IDEC RU Series Catalog

RU

Relays & Sockets

RU Series Universal Relays

Key features:

• Full featured universal miniature relays

• Designed with environment taken into consideration

• Two terminal styles: plug-in and PCB mount

Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers

• Non-polarized LED indicator

• No internal wires, lead-free construction

• Cadmium-free contacts

• Mechanical ag indicator

• Manual latching lever with color coding for AC or DC coil

• Snap-on yellow marking plate; optional marking plates are available in four other colors

• Maximum contact ratings: 10A (RU2), 6A (RU4), 3A (RU42)

• UL Recognized, CSA Certied, EN Compliant

With Latching or Momentary Lever

Mechanical Indicator*

The contact position can be conrmed through
the ve small windows.

Marking Plate

Standard yellow marking plate is easily replaced
with optional marking plates in four colors for
easy identication of relays.

LED Indicator*

Non-polarized green LED indicator is standard
provision for plug-in terminal, latching lever
types

Standard (without lever)

AC/DC Color Marking

For identication of AC or DC coils.
AC coil: Yellow
DC coil: Blue

Mechanical Indicator*

Marking Plate

LED Indicator*

Non-polarized green LED indicator is standard
provision for plug-in terminal types.

*Not available on PCB type.

EN61810-1

AC Coil DC Coil

Latching and Momentary Lever

Using the lever, operation can be checked without energizing the coil.
The lever is color coded for AC and DC coils.

Latching Momentary

AC coil: Orange Red
DC coil: Green Blue

In Normal Operation

Note: Turn off the power to the relay coil when using the latching

lever. After checking the operation, return the latching lever
in the normal position.

Coil Voltage Tape Color

24V AC White
100 to 110V AC Clear
110 to 120V AC Blue
200 to 220V AC Black
220 to 240V AC Red
24V DC Green
6V DC
12V DC
48V DC
110V DC

Voltage marking on
yellow tape

890

1705151135

•

Relays & Sockets

RU

Part Number Selection

Part Number

Contact Model Standard With Latching Lever With Momentary Lever

DPDT (10A)

4PDT (6A)

4PDT Bifurcated (3A)

1. Plug-in terminal models have an LED indicator and a mechanical indicator as standard.

2. PCB models do not have an LED indicator or a mechanical indicator.

Standard

With RC (AC coil only)

With diode (DC coil only)

PCB

Standard

With RC (AC coil only)

With diode (DC coil only)

PCB

Standard

With RC (AC coil only)

With diode (DC coil only)

PCB

RU2S-C-0 RU2S-0 RU2S-M-0

0 RU2S-R-0 RU2S-MR-0

RU2S-CR-

RU2S-CD-

0 RU2S-D-0 RU2S-MD-0

0

RU2V-NF-

RU4S-C-0 RU4S-0 RU4S-M-0

0 RU4S-R-0 RU4S-MR-0

RU4S-CR-

RU4S-CD-

0 RU4S-D-0 RU4S-MD-0

0

RU4V-NF-

RU42S-C-0 RU42S-0 RU42S-M-0

RU42S-CR-

RU42S-CD-

RU42V-NF-

0 RU42S-R-0 RU42S-MR-0

0 RU42S-D-0 RU42S-MD-0

0

— —

— —

— —

Ordering Information

When ordering, specify the Part No. and coil voltage code:
(example) RU2S-C A110

Part No. Coil Voltage Code

Switches & Pilot Lights Signaling Lights Relays & Sockets Timers Contactors Terminal Blocks Circuit Breakers

Coil Voltage Code

(Standard Stock in bold)

A24, A110, A220
D6, D12, D24, D48, D110

A110, A220

D6, D12, D24, D48, D110

A24, A110, A220
D6, D12, D24, D48, D110

A24, A110, A220
D6, D12, D24, D48, D110

A110, A220

D6, D12, D24, D48, D110
A24, A110, A220

D6, D12, D24, D48, D110
A24, A110, A220

D6, D12, D24, D48, D110

A110, A220

D6, D12, D24, D48, D110

A24, A110, A220
D6, D12, D24, D48, D110

Coil Voltage Table

Coil Voltage Code A24 A110 A220 D6 D12 D24 D48 D110
Coil Rating 24V AC 110-120V AC 220-240V AC 6V DC 12V DC 24V DC 48V DC 110V DC

Sockets

Relays

RU2S (DPDT) SU2S-11L SM2S-05 SM2S-05C

RU4S (4PDT)
RU42S (4PDT)

Spring Clamp

DIN Rail Mount

SU4S-11L SY4S-05 SY4S-05C

Standard DIN

Rail Mount

Finger-safe DIN

Rail Mount

Panel Mount PCB Mount

SM2S-61

SY4S-51

SM2S-62
SY4S-61

SY4S-62

1705151135

891

RU

Hold Down Springs & Clips

Appearance Item Relay

For DIN
Mount Socket

Relays & Sockets

For Through
Panel & PCB
Mount Socket

Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers

Pullover Wire
Spring

Leaf Spring
(side latch)

Leaf Spring
(top latch)

RU2S/RU4S/
RU42S

RU2S/RU4S/
RU42S

RU2S/RU4S/
RU42S

SY4S-02F1 SY4S-51F1

SFA-202* SFA-302*

SFA-101* SFA-301*

Accessories

Name Part Number Color Code *

Marking Plate RU9Z-P* A (orange), G (green), S (blue), W (white), Y (yellow)

Specify a color code when ordering. The marking plate can be removed from the relay by inserting

a at screwdriver under the marking plate.

Specications

Model (Contact) RU2 (DPDT) RU4 (4PDT) RU42 (4PDT-bifurcated)

Contact Material Silver alloy Silver (gold clad) Silver-nickel (gold clad)

Contact Resistance

Minimum
Applicable Load

Operating Time

Release Time
Power Consumption AC: 1.1 to 1.4VA (50 Hz), 0.9 to 1.2VA (60 Hz) DC: 0.9 to 1.0W
Insulation Resistance 100MΩ minimum (500V DC megger)

Dielectric Strength

Operating Frequency

Vibration Resistance

Shock Resistance

Mechanical Life

Electrical Life

Operating
Temperature 5

Operating Humidity 5 to 85% RH (no condensation)
Weight Approx. 35g

1. Measured using 5V DC, 1A voltage drop method

2. Measured at operating frequency of 120 operations/min (failure rate level P, reference value)

3. Measured at the rated voltage (at 20°C), excluding contact bouncing;
Release time of AC relays with RC: 25 ms maximum
Release time of DC relays with diode: 40 ms maximum

1

2

3

3

24V DC, 5 mA

(reference value)

50 mΩ maximum

1V DC, 1 mA 1V DC, 0.1 mA

20 ms maximum
20 ms maximum

Between contact and coil: 2500V AC, 1 minute

Between contacts of different poles:

2500V AC, 1 minute 2000V AC, 1 minute

Between contacts of the same pole: 1000V AC, 1 minute

Electrical: 1800 operations/h maximum

Mechanical: 18,000 operations/h maximum

Damage limits: 10 to 55 Hz, amplitude 0.5 mm

Operating extremes: 10 to 55 Hz, amplitude 0.5 mm

2

Damage limits: 1000 m/s

(100G)

Operating extremes: 150 m/s2 (15G)

AC: 50,000,000 operations

DC: 100,000,000 operations

4

See table on page 894

50,000,000 operations

PCB model: –55 to +70°C (no freezing)

Blade model: –55 to +60°C (no freezing)

Note: Order 2 pieces for each relay

4. Contact Load and Electrical Life (at ambient temperature 20°C)

5. Measured at the rated voltage.

892

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Relays & Sockets

RU

Accessories

Item Appearance Use with Part No. Remarks

Aluminum
DIN Rail
(1 meter length)

DIN Rail End
Stop

Replacement
Hold-Down
Spring Anchor

All DIN rail sockets BNDN1000

DIN rail BNL5 9.1 mm wide.

Horseshoe clip for DIN rail
sockets

Y778-011

The BNDN1000 is designed to accommodate DIN mount sockets.
Made of durable extruded aluminum, the BNDN1000 measures 0.413
(10.5mm) in height and 1.37 (35mm) in width (DIN standard). Standard
length is 39” (1,000mm).

For use on DIN rail mount socket when using pullover wire hold down
spring. 2 pieces included with each socket.

Coil Ratings

Rated Voltage (V)

AC

(50/60 Hz)

DC

1. The rated current includes the current of the LED indicator.

24 A24 49.3 42.5 164

220-240 A220 4.2-5.0 3.6-4.2 18,230

6 D6 155 40
12 D12 80 160
24 D24 44.7 605
48 D48 18 2,560

110 D110 8.9 12,100

Coil

Voltage

Code

Rated Current (mA)

±15% (at 20°C)

50 Hz 60 Hz

Coil Resistance (Ω)

±10% (at 20°C)

Maximum Continuous

Applied Voltage

110% 80% maximum 30% minimum110-120 A110 8.4-10.0 7.1-8.2 4,550

110% 80% maximum 10% minimum

Switches & Pilot Lights Signaling Lights Relays & Sockets Timers Contactors Terminal Blocks Circuit Breakers

Operating Characteristics (values at 20°C)

Pickup Voltage Dropout Voltage

Surge Suppressor Ratings

Model Ratings

AC Coil With RC

DC Coil With Diode

RC series circuit
R: 20 kΩ, C: 0.033 µF

Diode reverse voltage: 1000V
Diode forward current: 1A

Contact Ratings

Maximum Contact Capacity

Contact

DPDT 10A

4PDT 6A

4PDT

bifurcated

Continuous

Current

3A

1. On 4PDT relays, the maximum allowable total current of neighboring two poles is 6A. At the rated
load, make sure that the total current of neighboring two poles does not exceed 6A (3A + 3A = 6A).

2. Inductive load for the rated load — cos ø = 0.3, L/R = 7 ms

Allowable Contact Power

Resistive Load Inductive Load Res. Load Ind. Load
2500VA AC 1250VA AC 250 AC 10A 5A
300W DC 150W DC 30 DC 10A 5A
1500VA AC 600VA AC 250 AC 6A 0.8A
180W DC 90W DC 30 DC 6A 1.5A
750VA AC 200VA AC 250 AC 3A 0.8A
90W DC 45W DC 30 DC 3A 1.5A

Voltage

(V)

Rated Load

UL and c-UL Ratings

Voltage

250V AC 10A — 3A — 6A — — 1/10HP —

30V DC 10A 6A 3A — — — — — —

CSA Ratings

Voltage

250V AC 3A

30V DC 3A

Resistive General Use Horse Power Rating

RU2 RU4 RU42 RU2 RU4 RU42 RU2 RU4 RU42

TÜV Ratings

Resistive

RU42

Voltage

250V AC 10A 6A 3A 5A 0.8A 0.8A

30V DC 10A 6A 3A 5A 1.5A 1.5A

Resistive Inductive

RU2 RU4 RU42 RU2 RU4 RU42

1705151135

893

RU

250V AC

Load Current (A)

(¥ 10,000 operations)

250V AC

Load Current (A)

(¥ 10,000 operations)

250V AC

Load Current (A)

(¥ 10,000 operations)

250V AC/30V DC

Load Current (A)

(¥ 10,000 operations)

Load Current (A)

(¥ 10,000 operations)

250V AC

Load Current (A)

(¥ 10,000 operations)

250V AC

AC resistive

Load Voltage (V)

Load Current (A)

Relays & Sockets

Socket Specications

Sockets Terminal Electrical Rating Wire Size Torque

SU2S-11L Spring clamp terminals 250V/10A 24-16 AWG —
SU4S-11L Spring clamp terminals 250V/6A (using RU4), 10A (using RU2) 24-16 AWG —

DIN Rail Mount
Sockets

Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers

SM2S-05 M3 screw with captive wire clamp 300V, 10A Maximum up to 2–#14AWG 5.5 - 9in•lbs
SM2S-05C M3 screw with captive wire clamp, ngersafe 300V, 10A Maximum up to 2–#14AWG 5.5 - 9in•lbs
SY4S-05 M3 screw with captive wire clamp 300V, 7A (using RU4), 10A (using RU2) Maximum up to 2–#14AWG 5.5 - 9in•lbs
SY4S-05C M3 screw with captive wire clamp, ngersafe 300V, 7A (using RU4), 10A (using RU2) Maximum up to 2–#14AWG 5.5 - 9in•lbs

Through Panel
Mount Socket

PCB Mount Socket

SY4S-51 Solder 300V, 7A — —

SY4S-61 PCB mount 300V, 7A — —
SY4S-62 PCB mount 250V, 7A — —

Electrical Life Curves

RU2 (Resistive Load) RU4 (Resistive Load) RU42 (Resistive Load)

30V DC
110V DC

30V DC
110V DC

100

10

1

6 3 10.50.1

0.02 6310.50.1

1000

100

30V DC
110V DC

10

1

10 5 10.50.1

1000

100

10

1

RU2 (Inductive Load) RU4 (Inductive Load) RU42 (Inductive Load)

1000

100

10

1

110V DC

AC: cos ø = 0.3
DC: L/R = 7 ms

0.1 0.5 1 5 10

100

10

1

AC: cos ø = 0.3
DC: L/R = 7 ms

0.1 0.50.02

30V DC
110V DC

100

10

1

AC: cos ø = 0.3
DC: L/R = 7 ms

0.1 0.50.02

30V DC
110V DC

Maximum Switching Current

RU2 RU4 RU42 (Bifurcated)

10

5

1

0.1

894

DC resistive

DC inductive
L/R = 7 ms

10 30 100 250 500

AC inductive
(cos ø = 0.3)

1705151135

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Relays & Sockets

120

70

Ambient Temperature (C)

Temperature Rise (C)

070

120

Ambient Temperature (C)

Temperature Rise (C)

070

120

Ambient Temperature (C)

Temperature Rise (C)

070

120

Ambient Temperature (C)

Temperature Rise (C)

120

70

Ambient Temperature (C)

Temperature Rise (C)

120

70

Ambient Temperature (C)

Temperature Rise (C)

RU

Ambient Temperature vs. Temperature Rise Curves

RU2 (AC Coil, 50 Hz) RU2 (AC Coil, 60 Hz) RU2 (DC Coil)

110

100

90

80

70

60

50

40

30

20

10

Load current
10A ¥ 2 poles

Load current
5A ¥ 2 poles

No load current

6050403020100

110

100

90

80

70

60

50

40

30

20

10

Load current
10A ¥ 2 poles

Load current
5A ¥ 2 poles

No load current

010203040506

RU4/RU42 (AC Coil, 50 Hz) RU4/RU42 (AC Coil, 60 Hz) RU4/RU42 (DC Coil)

110

100

90

80

70

60

50

40

30

20

10

010203040506

Load current
3A ¥ 4 poles

Load current
6A ¥ 2 poles

No load current

110

100

90

80

70

60

50

40

30

20

10

Load current
3A ¥ 4 poles

Load current
6A ¥ 2 poles

No load current

6050403020100

110

100

90

80

70

60

50

40

30

20

10

110

100

90

80

70

60

50

40

30

20

10

Load current
10A ¥ 2 poles

Load current
5A ¥ 2 poles

010203040506

Load current
3A ¥ 4 poles

Load current
6A ¥ 2 poles

No load current

Switches & Pilot Lights Signaling Lights Relays & Sockets Timers Contactors Terminal Blocks Circuit Breakers

No load current

6050403020100

The above temperature rise curves show the characteristics when 100% the rated coil voltage is applied.
The heat resistance of the coil is 120°C. The slant dashed line indicates the allowable temperature rise for the coil at different ambient temperatures.
Load current 6A x 2 poles is for the RU4 models only.

1705151135

895

RU

Over 24V AC/DC coil

(1)12 (4)42

Over 24V DC coil

(4)42(1)12

Over 24V AC/DC coil

(4)42(3)32(2)22(1)12

Over 24V DC coil

(1)12 (2)22 (3)32 (4)42

Latching
Lever
AC: Orange
DC: Green

Marking Plate (yellow)

LED Indicator
(green)

Marking Plate
Removal Slot

Mechanical Indicator Window

Marking Plate (yellow)

Marking Plate
Removal Slot

Color Marking
A

C: Yellow

DC: Blue

Relays & Sockets

Internal Connection (View from Bottom)

RU2S-* Standard RU2S-*R with RC RU2S-*D With Diode RU2V-NF-*

(4)42(1)12

(8)44(5)14

(12)41(9)11

(14)A2

Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers

(5)14 (8)44

(9)11 (12)41

(13)A1

(14)A2

(13)A1

(8)44(5)14

(12)41(9)11

(14)A2

(13)A1

(13)A1

(4)42(1)12

(8)44(5)14

(12)41(9)11

(14)A2

24V AC/DC coil or less

(4)42(1)12

(8)44(5)14

(12)41(9)11

(13)A1

(14)A2

24V DC coil or less

(1)12 (4)42

(5)14 (8)44

(9)11 (12)41

(13)A1

(14)A2

RU4S-*/RU42S-* Standard RU4S-*R/RU42S-*R With RC RU4S-*D/RU42S-*D With Diode RU4V-NF-*/RU42V-NF-*

(4)42(3)32(2)22(1)12

(8)44(7)34(6)24(5)14

(12)41(11)31(10)21(9)11

(13)A1

(14)A2

24V AC/DC coil or less

(1)12 (2)22 (3)32 (4)42

(5)14 (6)24 (7)34 (8)44

(9)11 (10)21 (11)31 (12)41

(13)A1

(14)A2

(13)A1

(8)44(7)34(6)24(5)14

(12)41(11)31(10)21(9)11

(14)A2

(5)14 (6)24 (7)34 (8)44

(9)11 (10)21 (11)31 (12)41

(13)A1

(14)A2

24V DC coil or less

(4)42(3)32(2)22(1)12

(8)44(7)34(6)24(5)14

(12)41(11)31(10)21(9)11

(13)A1

(14)A2

(13)A1

Dimensions (mm)

(4)42(3)32(2)22(1)12

(8)44(7)34(6)24(5)14

(12)41(11)31(10)21(9)11

(14)A2

RU2S RU2V

35.06.4

2.6

0.5

ø1.2 ¥ 2.2 Hole

21.0

14

58912

13 14

27.5

Marking plate removal slot is provided only on one side.
Insert a at screwdriver into the slot to remove the marking

plate.

0.5

21.0

27.5

Mounting Hole Layout

7.0

12.74.1

8-ø1 Holes

6.4

35.0

13.2

0.8

2.6

4.0

13.2

All dimensions in mm.

0.5

896

1705151135

•

Relays & Sockets

Latching
Lever
AC: Orange
DC: Green

LED Indicator
(green)

Marking Plate
Removal Slot

Mechanical Indicator Window

Marking Plate (yellow)

Marking Plate (yellow)

Marking Plate
Removal Slot

Color Marking
A

C: Yellow

DC: Blue

31

80

38.3

31

80

cannot be used.

623 0.7

31.5

Terminal Arrangement

30

RU

Dimensions con’t (mm)

RU4S/RU42S RU4V/RU42V

35.0

0.5

1211109

ø1.2 × 2.2 Hole

1413

8

4321

765

21.0

27.5

Marking plate removal slot is provided only on one side.
Insert a at screwdriver into the slot to remove the marking

plate.

6.4

2.6

Mounting Hole Layout

0.5

21.0

27.5

7.0

4.1 12.7

14-ø1 Holes

6.4

35.0

4.0

4.4

0.5

3-4.4

0.8

2.6

13.2

All dimensions in mm.

Switches & Pilot Lights Signaling Lights Relays & Sockets Timers Contactors Terminal Blocks Circuit Breakers

Spring Clamp DIN Rail Mount Sockets

SU2S-11L SU4S-11L

28.8

4.4

Standard DIN Rail Mount Sockets

SM2S-05 SY4S-05

30

6

M3 Terminal
Screw

4.2

26

32

38.3

4.8 min.

ø3.2 min.

Terminal Arrangement

12 11 10 9

5678

4321

1314

(

)

Top View

Terminal Arrangement

78

432

14

12 1110

(

Top View

56

1

13

9

)

Terminal Arrangement

912

2-ø3.2
Mounting Holes

24.0

37.5

Ring terminals
cannot be used.

18

DIN Rail
(BNDN)

45

18.5

25

2-ø4.2 Mounting Holes
(or M4 Tapped Holes)

26

4 max.

5.9 max.

4.8 min.

ø3.2 min.

8 5

14 13

(

Top View

8

4

14

12

(

Top View

14

28.8

)

5

1

13

9

)

4.4

6

M3 Terminal
Screw

623 0.7

4.2

26

37.5

32

31.5
DIN Rail

18

(BNDN)

45

18.5

25

24.0

4 max.

5.9 max.

2-ø3.2
Mounting Holes

Ring terminals

2-ø4.2 Mounting Holes
(or M4 Tapped Holes)

26

1705151135

897

RU

30

64

1.6

Terminal Arrangement

30

64

1.6

35.5

31

13.2

13.2

Relays & Sockets

Dimensions con’t (mm)

Finger-safe DIN Rail Mount Sockets

SM2S-05C SY4S-05C

35.5

46

2

29

Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers

6

M3 Terminal
Screw

ø

5.5

4.2

26

PCB Mount Sockets

SM2S-61 SM2S-62

25.4

27

21.2

3

0.3

11

15

1.5

SY4S-61 SY4S-62

Terminal Arrangement

31

27

1.5

21.2

25.4

3

0.3

11

15

DIN Rail
(BNDN)

25

18

Ring terminals

18.2

cannot be used.

Terminal Arrangement

1
5

12

9

13 14

(Bottom View)

* 19.2 min. when using
hold-down springs

3

462

1
5

8

7

12

9

11

10

13

14

(Bottom View)

* 19.2 min. when using
hold-down springs

2-ø4.2 Mounting Holes

(or M4 Tapped Holes)

26

4
8

16.8

14.2 min.*

16.8

14.2 min.*

10.4

8

5

1

4

13

14

12

9

(

)

Top View

13.2

4.1

10.4

1.4

8.8

4.1

1.4

4.4

ø2 holes

9-

(Tolerance 0.1)

13.8 min.

ø2 holes

15-

(Tolerance 0.1)

13.8 min.

9

M3 Terminal

6

Screw

ø

5.5

4.2

46

26

2

DIN Rail

25

(BNDN)

18

18.2

29

2-ø4.2 Mounting Holes

(or M4 Tapped Holes)

26

Ring terminals
cannot be used.

Terminal Arrangement

56

78

432

1

13

14

12 11 10

9

(

)

Top View

13.2

Terminal Arrangement

4

1
5

29

9

21.2

1.5

29

21.2

1.5

3

3

0.3

11

15

Terminal Arrangement

0.3

11

15

9

13

(Bottom View)

3

1
5

7

9

11

10

13

(Bottom View)

8

12

14

462

8

12

14

*

17.2 min. when using a hold-down spring.

13.2 min. when using a hold-down spring for

* *

the relay with check button

4.1

10.4

16.8

1.4

12.2 min.*

*

17.2 min. when using a hold-down spring.

13.2 min. when using a hold-down spring for

**

the relay with check button.

8.8

4.4

4.1

10.4

16.8

1.4

12.2 min.*

8.2 min.**

9

9-ø2 holes

(Tolerance 0.1)

8.2 min.**

9

15-ø2 holes

(Tolerance 0.1)

Through Panel Mount Socket

SY4S-51

Panel Thickness:
1 to 2

31

27

21.2

3

0.3

11

18.7

2.4

898

25.4

Terminal Arrangement

3

2

1
5

7

846

12

10

11

9

13

14

(Bottom View)

[27 (N–1) + 21.4]

0

+0.2

25.6

5.4 min.*

* 10.4 min. when using hold-down springs

+0.5

0

N: No. of sockets mounted

1705151135