Carlo Gavazzi RA2A Catalog Page

Specifications are subject to change without notice (30.09.2005) 1

• 2-Pole AC Solid State Relay

• Zero switching

• For resistive and inductive AC loads

• Direct copper bonding (DCB) technology

• LED indication

• Rated operational current: 2 x 25 and 2 x 40AACrms

• Rated operational voltage: 230 - 600VACrms

• Input range: 4.5 - 32VDC

• Non-repetitive peak voltage: Up to 1200Vp

• Opto-isolation: 4000VACrms

Product Description

This 2-pole industrial relay
minimises the space require­ments in a control cabinet
without compromising perfor­mance. By applying an input
voltage on control A, the corre­sponding output semicondcu­tor is activated at the first zero
crossing of the line

Solid State Relay
Number of poles
Zero switching
Rated operational voltage
Control voltage
Rated operational current
Load type

Ordering Key

Solid State Relays

Type Selection

Switching mode Rated operational Rated operational Control Non-rep. Load

voltage current voltage voltage type

A: Zero switching 23: 230VACrms 25: 2 x 25AACrms D: 4.5 - 32VDC 23: 650V

p

M: Inductive

40: 400VACrms 40: 2 x 40AACrms 40: 850V

p

48: 480VACrms 48: 1200V

p

60: 600VACrms 60: 1200V

p

Selection Guide

Rated operational Non-rep. voltage Control voltage Rated operational current
voltage 2 x 25AACrms 2 x 40AACrms

230VACrms 650V

p

4.5 - 32VDC RA2A23D25 RA2A23D40

RA2A23D25M RA2A23D40M

400VACrms 850V

p

4.5 - 32VDC RA2A40D25 RA2A40D40

RA2A40D25M RA2A40D40M

480VACrms 1200V

p

4.5 - 32VDC RA2A48D25 RA2A48D40

RA2A48D25M RA2A48D40M

600VACrms 1200V

p

4.5 - 32VDC RA2A60D25 RA2A60D40

RA2A60D25M RA2A60D40M

Industrial, 2-Pole ZS
Type RA2A

voltage.The same applies to
control B. LEDs indicate the
control status of each pole.
The optimised design is free of
moulding mass to reduce inter­nal mechanical stress.
The RA2A..M types have been
specially customised for
demanding inductive loads.

RA 2 A 48 D 25 M

Input Specifications

Control voltage range 4.5 - 32VDC
Pick-up voltage 4.25VDC
Drop-out voltage 2VDC
Input current per pole

@ max. input voltage ≤10mA
Response time pick-up ≤10ms

@ 50 Hz
Response time drop-out ≤10ms

@ 50 Hz

Weight Approx. 85g
Housing material Noryl GFN 1, black
Base plate

25, 40A Aluminium, nickel-plated
40A (M type) Copper, nickel-plated

FASTONTerminal size 6.3mm

Housing Specifications

2 Specifications are subject to change without notice (30.09.2005)

RA2A

Output Specifications

RA2A...25 RA2A...40 RA2A..D25M RA2A..D40M

Rated operational current AC 51 2 x 25AACrms 2 x 40AACrms 2 x 25AACrms 2 x 40AACrms

AC 53a - - 2 x 5AACrms 2 x 15AACrms
Minimum operational current 150mA 150mA 150mA 150mA
Non-rep. surge current t=10 ms 300A

p

390A

p

300A

p

580A

p

Off-state leakage current < 3mA < 3mA < 3mA < 3mA
I2t for fusing t=1-10 ms 450A2s 760A2s 450A2s 1680A2s
On-state voltage drop

@ rated current ≤ 1.6Vrms ≤ 1.6Vrms ≤ 1.6Vrms ≤ 1.6Vrms
Critical dV/dt off-state min. 500V/µs 500V/µs 500V/µs 500V/µs
Zero crossing detection Yes Yes Yes Yes

RA2A23... RA2A40... RA2A48... RA2A60...

Operational voltage range 24 to 265VACrms 42 to 440VACrms 42 to 530VACrms 42 to 660VACrms
Non-rep. peak voltage 650V

p

850V

p

1200V

p

1200V

p

Rated insulation
input -output/output - heatsink 4kV 4kV 4kV 4kV

Operational frequency range 45 to 65Hz 45 to 65Hz 45 to 65Hz 45 to 65Hz
LED ON indication (x2) Yes (green) Yes (green) Yes (green) Yes (green)
Power factor

RA2A ≥ 0.95 @ 230VAC ≥ 0.95 @ 400VAC ≥ 0.95 @ 480VAC ≥ 0.95 @ 600VAC

RA2A..M ≥ 0.50 @ 230VAC ≥ 0.50 @ 400VAC ≥ 0.50 @ 480VAC ≥ 0.50 @ 600VAC
Zero voltage turn-on < 15V < 15V < 15V < 15V
Approvals UL, cUL, CSA UL, cUL, CSA UL, cUL, CSA UL, cUL, CSA
CE-marking Yes Yes Yes Yes
Conformance VDE VDE VDE VDE

General Specifications

Functional Diagram

Dimensions

All dimensions in mm

Specifications are subject to change without notice (30.09.2005) 3

0.68 0.56 0.44 0.32 0.19 0.07 82

0.87 0.73 0.59 0.45 0.31 0.17 72

1.10 0.94 0.78 0.62 0.45 0.29 62

1.41 1.22 1.03 0.83 0.64 0.45 52

1.8 1.6 1.36 1.13 0.90 0.67 43

2.3 2.0 1.7 1.4 1.1 0.86 35

3.0 2.6 2.2 1.9 1.5 1.11 27
4 4 3 2.6 2.0 1.5 20
6 6 5 4 3 2.4 13

13 12 10 8 7 5 6
20 30 40 50 60 70

RA2A

Heatsink Dimensions

(load current versus ambient temperature)

RA 2....25/25M

T

A

Ambient temp. [°C]

50
45
40
35
30
25
20
15
10
5

Power
dissipation [W]

Thermal resistance
[K/W]

Load
current [A]

1.11 0.94 0.78 0.62 0.46 0.29 62

1.36 1.17 0.99 0.80 0.61 0.43 54

1.68 1.47 1.25 1.03 0.81 0.60 46

2.06 1.80 1.54 1.29 1.03 0.77 39

2.5 2.2 1.87 1.56 1.25 0.94 32

3.1 2.7 2.3 1.9 1.6 1.17 26

4.0 3.5 3.0 2.5 2.0 1.52 20
6 5 4 3.5 2.8 2.1 14

987643.39

18 16 14 12 9 7 4
20 30 40 50 60 70

RA 2....40

T

A

Ambient temp. [°C]

80
72
64
56
48
40
32
24
16
8

Power
dissipation [W]

Thermal resistance
[K/W]

Load
current [A]

Carlo Gavazzi Heatsink Thermal ...for power

(see Accessories) resistance... dissipation

No heatsink required --- N/A

RHS 300 5.00K/W > 0 W

RHS 100 3.00K/W > 25 W
RHS 45C 2.70K/W > 60 W
RHS 45B 2.00K/W > 60 W
RHS 90A 1.35K/W > 60 W

RHS 45A plus fan 1.25K/W > 0 W

RHS 45B plus fan 1.20K/W > 0 W

RHS 112A 1.10K/W > 100 W

RHS 301 0.80K/W > 70 W

RHS 90A plus fan 0.45K/W > 0 W

RHS 112A plus fan 0.40K/W > 0 W

RHS 301 plus fan 0.25K/W > 0 W

Consult your distribution > 0.25K/W N/A

Infinite heatsink - No solution

--- N/A

Heatsink Selection

RA 2....40M

T

A

Ambient temp. [°C]

100
90
80
70
60
50
40
30
20
10
5

Power
dissipation [W]

Thermal resistance
[K/W]

Load
current [A]

0.41 0.32 0.23 0.13 0.04 - 108

0.55 0.44 0.34 0.23 0.13 0.02 95

0.72 0.60 0.48 0.35 0.23 0.11 82

0.95 0.80 0.66 0.52 0.37 0.23 70

1.25 1.08 0.90 0.73 0.56 0.39 58

1.7 1.5 1.25 1.04 0.83 0.61 47

2.2 1.9 1.6 1.4 1.1 0.82 36
3 2.7 2.3 1.9 1.5 1.14 26
5 4 4 2.9 2.3 1.8 17

10 9 7 6 5 3.6 8
20 17 15 12 10 7 4
20 30 40 50 60 70

Accessories

Heatsinks
DIN rail adapter
Varistors
Fuses

For further information refer
to "General Accessories".

Rated insulation voltage ≥ 4000VACrms

Input to output

Rated insulation voltage ≥ 4000VACrms

Output to case

Insulation

Note: Add the currents of both poles and compare with datasheets for proper heatsink.
Each pole can handle up to the maximum current specified. Example: Each pole of the RA2A23D25 can handle a maximum of 25 A.

4 Specifications are subject to change without notice (30.09.2005)

RA2A

Applications

Heat flow

Heatsink
temperature

R

th

j-c

R

th

c-s

Rths-a

Junction
temperature

Case
temperature

Ambient
temperature

This relay is designed for use
in applications in which it is
exposed to high surge condi­tions. Care must be taken to
ensure proper heatsinking
when the relay is to be used at
high sustained currents. Ade­quate electrical connection
between relay terminals and
cable must be ensured.

Thermal characteristics

The thermal design of Solid
State Relays is very important.

R

th

c-s = case to heatsink

R

th

s-a = heatsink to ambient

Thermal resistance:
R

th

j-c = junction to case

It is essential that the user
makes sure that cooling is ad­equate and that the maximum
junction temperature of the
relay is not exceeded.

If the heatsink is placed in a
small closed room, control panel
or the like, the power dissipation
can cause the ambient tem­perature to rise. The heatsink
is to be calculated on the basis
of the ambient temperature and
the increase in temperature.

Thermal Specifications

RA2A...25. RA2A...40 RA2A...40M

Operating temperature -20° to 70°C -20° to 70°C -20° to 70°C
Storage temperature -20° to 80°C -20° to 80°C -20° to 80°C
Junction temperature ≤ 125°C ≤ 125°C ≤125°C
R

th

junction to case
1 pole 1K/W 1K/W 0.92K/W
2 pole 0.5K/W 0.5K/W 0.46K/W

R

th

junction to ambient ≤ 20K/W ≤ 20K/W ≤ 20K/W

Applications

A single two pole relay in a three phase application.
Star and Delta (Economy switch)

A two pole relay and a single pole relay connected on a
three phase application. Delta, star and star with a neu­tral point.