Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers
RH4BSH4B-05SH4B-05CSH4B-51SH4B-62
Hold Down Springs & Clips
AppearanceItemRelay
RH1BSY2S-02F1
Pullover Wire Spring
RH2BSY4S-02F1
RH3BSH3B-05F1
RH4BSH4B-02F1
For DIN
Mount Socket
2
2
2
2
For Through Panel &
PCB Mount Socket
SY4S-51F1
1. DIN Rail mount socket
comes with two
horseshoe clips. Do
not use unless you
plan to insert pullover
wire spring. Replacement horseshoe
clip part number is
Y778-011.
2. Must use horseshoe clip when
mounting in DIN mount socket.
Replacement horseshoe clip
part number is Y778-011.
3. Two required per relay.
Leaf Spring (side latch)RH1B, RH2B, RH3B, RH4BSFA-202
Leaf Spring (top latch)RH1B, RH2B, RH3B, RH4BSFA-101
240V AC10A10A—7.5A7A7A7A5A1/3 HP
120V AC10A10A10A10A7.5A7.5A—7.5A1/6 HP
30V DC10A10A10A10A7A7.5A———
250V, 10AMaximum up to 2–#12AWG
250V, 10AMaximum up to 2–#12AWG
ResistiveGeneral Use
RH1RH2RH3RH4RH1RH2RH3RH4RH1, 2, 3
5.5-9in•lbs
9-11.5in•lbs
5.5-9in•lbs
9-11.5in•lbs
Horsepower
Rating
Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers
Accessories
ItemAppearanceUse withPart No.Remarks
Aluminum
DIN Rail
(1 meter length)
DIN Rail End
Stop
Replacement
Hold-Down
Spring Anchor
All DIN rail socketsBNDN1000
DIN railBNL59.1 mm wide.
DIN mount sockets and hold
down springs.
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.
Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers
Operating Time
Release Time
Power Consumption
(approx.)
Insulation Resistance100MΩ minimum (500V DC megger)
Dielectric Strength
Operating Frequency
Vibration Resistance
Shock Resistance
Mechanical Life50,000,000 operations minimum
Electrical Life
Operating
Temperature
Operating Humidity45 to 85% RH (no condensation)
Weight (approx.)SPDT: 24g, DPDT: 37g, 3PDT: 50g, 4PDT: 74g
Note: Above values are initial values.
1. Measured using 5V DC, 1A voltage drop method
2. Measured at the rated voltage (at 20°C), excluding contact bouncing
Release time of relays with diode: 40 ms maximum
3. Relays with indicator or diode: 1000V AC, 1 minute
4. For use under different temperature conditions, refer to Continuous Load Current vs. Operating Temperature Curve. The operating
temperature range of relays with indicator or diode is –25 to +40°C.
Total length from panel surface including relay socket
SH1B-05: 61.5 (63.5
35.6 max.
ø2.6 hole
)
max., SH1B-51: 39.6
Dimensions in the ( )
include a hold-down spring.
4.7
0.5
5.4
6.4
(
)
41.6
1
5
9
13
14
14
max.
27.5
Total length from panel surface including relay socket
SH2B-05: 61.5 (63.5
35.6 max.
ø2.6 hole
)
max., SH2B-51: 39.6
Dimensions in the ( )
include a hold-down spring.
4.7
0.5
6.4
(
14
58
9 12
13 14
21
41.6
)
max.
27.5
Total length from panel surface including relay socket
SH3B-05: 61.5 (63.5
35.6 max.
ø2.6 hole
)
max., SH3B-51: 39.6
Dimensions in the ( )
include a hold-down spring.
4.70.5
6.431
(
)
41.6
2
4
1
8
5
6
9
11
10
14
13
max.
Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers
27.5
RH4B-U/RH4B-UL/RH4B-UD/RH4B-ULD RH1B-UTRH2B-UT
Total length from panel surface including relay socket
SH4B-05: 61.5 (63.5
)
max., SH4B-51: 39.6
Dimensions in the ( )
include a hold-down spring.
(
)
41.6
4.70.5
ø2.6 hole
12 34
7865
9 10 11 12
1314
35.6 max.
6.441
max.
27.5
ø2.6 hole
38
43.2
3.5
14.535.6 max.6.4
4.7
0.5
4.7
1
5
9
5.9
27.5
13
14
6.6
5.42
38
43.2
3.5
RH3B-UTRH4B-UT
3.5
38
43.2
21.5
31.535.6 max.6.4
1010
4.7
ø2.6 hole
0.5
4.7
1 2 4
9 10 12
13
865
28
38
44
14
5.9
2
7.25
2
35.6 max.6.4
42 max.
ø2.6 hole
101010
4.7
0.5
4.7
7.25
5.9
3.5
1 2 3 4
9 10 11
13
28
41.5
7 865
28
12
14
10
ø2.6 hole
21.5
2
35.6 max.6.4
4.7
0.54.7
1 4
5 8
5.9
9 12
27.5
14
13
7.25
800-262-IDEC (4332) • USA & Canada
779
RH
Relays & Sockets
Dimensions con’t (mm)
RH1V2-U/RH1V2-UDRH2V2-U/RH2V2-UL/RH2V2-UD
35.6 max.
0.5
2
0.5
2
4.6
20.5
3-ø2.4 holes
4.7
7.15
12.5
6.6
4.4
Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers
35.6 max.
2
1.5
0.5
1
5
9
0.5
4.6
27.5
13
14
14
2-ø2 holes
RH3V2-U/RH3V2-UL/RH3V2-DRH4V2-U/RH4V2-UL/RH4V2-UD
11-ø2.4 holes
1010
4.7
8-ø2.4 holes
0.5
1 4
5 8
9
27.5
12
14
13
5
21
14-ø2.4 holes
7.8
30
10
7.25
13.154.7
10
14.2
4.7
1 2 4
0.52
14
13
865
9 10 11
27.5
7.8
310.5
13.15
7.25
35.6 max.4.6
Standard DIN Rail Mount Sockets
SH1B-05SH2B-05
17
8
M3.5 Terminal
Screw
4.2
672.5
M3 Terminal
Screw
16
20
31.5
DIN Rail
18
(BNDN)
47
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
16
5.5 min.
4.4 max.
14.5
25
7.9 max.
(For terminals 1, 5, and 9)
4 max.
ø3.6 min.
5.9 max.
(For terminals 13 and 14)
4.8 min.
Terminal Arrangement
5
1
14
13
9
(
)
Top View
ø3.2 min.
672.5
SH3B-05SH4B-05
32
8
M3.5 Terminal
Screw
4.2
672.5
36
40
31.5
DIN Rail
18
(BNDN)
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
47
36
4.4 max.5.5 min.
14.5
25
7.9 max.
ø3.6 min.
Terminal Arrangement
5
8
6
2
1
4
141013
12
9
(
)
Top View
672.5
0.541
35.6 max.4.6
22
8
M3.5 Terminal
Screw
4.2
26
30
42
8
M3.5 Terminal
Screw
4.2
46
50
47
1 2 3 4
9 10 11 12
13
31.5
18
14.5
25
47
31.5
25
7 865
18
14.5
14
DIN Rail
(BNDN)
4.4 max.
7.9 max.
27.5
DIN Rail
(BNDN)
7.8
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
26
5.5 min.
ø3.6 min.
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
46
4.4 max.5.5 min.
7.9 max.
ø3.6 min.
13.15
7.25
Terminal Arrangement
8
5
1
4
14
13
12
9
(
)
Top View
Terminal Arrangement
5
8
1
47362
14
13
12 11
9
10
(
)
Top View
780
www.IDEC.com
Relays & Sockets
1.7
69
36
RH
Dimensions con’t (mm)
Finger-safe DIN Rail Mount Sockets
SH1B-05CSH2B-05C
17
M3.5 Terminal
7
Screw
5
ø
4.2
M3 Terminal
Screw
16
20
SH3B-05CSH4B-05C
32
M3.5 Terminal
7
Screw
ø
5
4.2
69
36
1.7
40
36
25
DIN Rail
(BNDN)
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
48
18.7
29.5
16
Ring terminals
cannot be used.
Terminal Arrangement
5
1
14
13
9
(
)
Top View
1.769
36
DIN Rail
25
(
)
BNDN
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
49
18.7
29.5
36
Ring terminals
cannot be used.
Terminal Arrangement
5
8
6
2
1
4
141013
12
9
(
)
Top View
1.769
22
26
30
7
42
46
50
M3.5 Terminal
Screw
ø5
4.2
7
Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers
25
DIN Rail
(
)
BNDN
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
49
18.7
29.5
When using
BAA/BAP: 33
25
ø5
4.2
49
18.7
29.5
26
Ring terminals
cannot be used.
DIN Rail
(BAA/BAP)
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
46
Ring type crimping
terminals cannot be used.
Terminal Arrangement
8
4
14
12
(
Top View
Terminal Arrangement
8
47362
14
12 11
10
(
Top View
5
1
13
9
)
5
1
13
9
)
Through Panel Mount Socket
SH1B-51SH2B-51
SH3B-51SH4B-51
800-262-IDEC (4332) • USA & Canada
781
RH
Relays & Sockets
Dimensions con’t (mm)
PCB Mount Sockets
SH1B-62SH2B-62
4.7
7.35
4.7
12.5
6.95
11.85
31 min.*
6.65
6.6
5.95
6.8
21.3
10 10
36 min.
18 min.
4.4
ø2 holes
2-
(Tolerance ±0.1)
11-
(Tolerance 0.1)
ø2.4 holes
ø2.4 holes
3-
* 36 min. when using
hold-down springs
Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers
31
18
12.2
Terminal Arrangement
1
5
25.4
0.3
3
11
15
2
1.5
9
13
14
(Bottom View)
SH3B-62SH4B-62
Terminal Arrangement
1
4
2
6
8
31
36
2
30.2
25.4
3
0.3
11
15
5
10
9
13
(Bottom View)
* 36 min. when using
hold-down springs
12
14
31 min.*
Terminal Arrangement
1
5
(Bottom View)
2
3
6
7
10
11
(Bottom View)
9412
13
12
8
14
4
8
14
* 34 min. when using
hold-down springs
29
21.2
2
31
45
2
39.2
3
11
15
25.4
0.3
Terminal Arrangement
1
5
9
25.4
0.3
13
* 36 min. when using
hold-down springs
3
11
15
6.85
4.7
12.5
31 min.*
2.85
5.65
4.7
12.5
6.6
29 min.*
45 min.
31.3
6.65
10 10 10
6.6
15.5
21.5 min.
10
8-ø2.4 holes
(Tolerance 0.1)
14-ø2.4 holes
(Tolerance 0.1)
782
www.IDEC.com
Relays & Sockets
Pulsation
)¥
Back emf
Operating Instructions
Operating Instructions
Driving Circuit for Relays
1. To ensure correct relay operation, apply rated voltage to the relay coil.
2. Input voltage for the DC coil:
A complete DC voltage is best for the coil power to make sure of stable relay
operation. When using a power supply containing a ripple voltage, suppress
the ripple factor within 5%. When power is supplied through a rectification
circuit, the relay operating characteristics, such as pickup voltage and dropout
voltage, depend on the ripple factor. Connect a smoothing capacitor for better
operating characteristics as shown below.
Smoothing
Capacitor
+
Relay
R
–
Emin Emax Emean
Ripple Factor (%
Emax = Maximum of pulsating current
Emin = Minimum of pulsating current
Emean = DC mean value
Emax –
Emean
3. Leakage current while relay is off:
When driving an element at the same time as the relay operation, special
consideration is needed for the circuit design. As shown in the incorrect
circuit below, leakage current (Io) flows through the relay coil while the relay
is off. Leakage current causes coil release failure or adversely affects the
vibration resistance and shock resistance. Design a circuit as shown in the
correct example.
Incorrect Correct
R
TE
Io
R
4. Surge suppression for transistor driving circuits:
When the relay coil is turned off, a high-voltage pulse is generated, causing a
transistor to deteriorate and sometimes to break. Be sure to connect a diode
to suppress the back electromotive force. Then, the coil release time becomes
slightly longer. To shorten the coil release time, connect a Zener diode
between the collector and emitter of the transistor. Select a Zener diode with
a Zener voltage slightly higher than the power voltage.
suppressing diode
+
Relay
R
–
Emin
DC
100%
Protection for Relay Contacts
1. The contact ratings show maximum values. Make sure that these values are
not exceeded. When an inrush current flows through the load, the contact
may become welded. If this is the case, connect a contact protection circuit,
such as a current limiting resistor.
2. Contact protection circuit:
When switching an inductive load, arcing causes carbides to form on the
contacts, resulting in increased contact resistance. In consideration of contact
reliability, contact life, and noise suppression, use of a surge absorbing circuit
is recommended. Note that the release time of the load becomes slightly
longer. Check the operation using the actual load. Incorrect use of a contact
protection circuit will adversely affect switching characteristics. Four typical
examples of contact protection circuits are shown in the following table:
This protection circuit can be used when the load
impedance is smaller than the RC impedance in an
Power
CR
Ind. Load
RC
+
Power
Diode
–
Power
Varistor
D
Varistor
Ind. Load
Ind. Load
3. Do not use a contact protection circuit as shown below:
This protection circuit is very effective in arc suppression when
opening the contacts. But, the capacitor is charged while the
contacts are opened. When the contacts are closed, the capacitor
Load
is discharged through the contacts, increasing the possibility of
contact welding.
Power
C
AC load power circuit.
•R: Resistor of approximately the same resistance
value as the load
•C:0.1 to 1 µF
This protection circuit can be used for both AC and
DC load power circuits.
R: Resistor of approximately the same resistance
value as the load
C: 0.1 to 1 µF
This protection circuit can be used for DC load power
circuits. Use a diode with the following ratings.
Reverse withstand voltage: Power voltage of the
load circuit x 10
Forward current: More than the load current
This protection circuit can be used for both AC and
DC load power circuits.
For a best result, when using a power voltage of 24
to 48V AC/DC, connect a varistor across the load.
When using a power voltage of 100 to 240V AC/DC,
connect a varistor across the contacts.
Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers
Generally, switching a DC inductive load is more difficult than switching a DC
resistive load. Using an appropriate arc suppressor, however, will improve the
switching characteristics of a DC inductive load.
Soldering
1. When soldering the relay terminals, use a soldering iron of 30 to 60W, and
quickly complete soldering (within approximately 3 seconds).
2. Use a non-corrosive rosin flux.
800-262-IDEC (4332) • USA & Canada
Power
C
This protection circuit is very effective in arc suppression when
opening the contacts. But, when the contacts are closed, a current
Load
flows to charge the capacitor, causing contact welding.
817
Operating Instructions
Other Precautions
Relays & Sockets
Operating Instructions con’t
1. General notice:
To maintain the initial characteristics, do not drop or shock the relay.
The relay cover cannot be removed from the base during normal operation. To
Switches & Pilot LightsSignaling LightsRelays & SocketsTimersContactorsTerminal BlocksCircuit Breakers
maintain the initial characteristics, do not remove the relay cover.
Use the relay in environments free from condensation, dust, sulfur dioxide
(SO
), and hydrogen sulfide (H2S).
2
Make sure that the coil voltage does not exceed applicable coil voltage range.
Safety Precautions
• Turn off the power to the relay before starting installation, removal, wiring,
maintenance, and inspection of the relays. Failure to turn power off may
cause electrical shock or fire hazard.
• Observe specifications and rated values, otherwise electrical shock or fire
hazard may be caused.
• Use wires of the proper size to meet voltage and current requirements. Tighten the terminal screws on the relay socket to the proper tightening torque.
• Surge absorbing elements on AC relays with RC or DC relays with diode are
provided to absorb the back electromotive force generated by the coil. When
the relay is subject to an excessive external surge voltage, the surge absorbing element may be damaged. Add another surge absorbing provision to the
relay to prevent damage.
2. UL and CSA ratings may differ from product rated values determined by IDEC.
3. Do not use relays in the vicinity of strong magnetic field, as this may affect
relay operation.
Precautions for the RU Relays
• Before operating the latching lever of the RU relay, turn off the power to
the RU relay. After checking the circuit, return the latching lever to the original position.
• Do not use the latching lever as a switch. The durability of the latching lever
is a minimum of 100 operations.
• When using DC loads on 4PDT relays, apply a positive voltage to terminals of
neighboring poles and a negative voltage to the other terminals of neighboring poles to prevent the possibility of short circuits.
• DC relays with a diode have a polarity in the coil terminals. Apply the DC voltage to the correct terminals.
818
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