RA4810LA12 - Carlo Gavazzi Group

2-60 Specifications are subject to change without notice (30.09.2005)

•AC Solid State Relay

•Zero switching

•Direct copper bonding technology

•Rated operational current: 10, 25, 50 and 90 AACrms

•Non-repetitive voltage: Up to 1200 Vp

•Rated operational voltage: Up to 480 VACrms

•3 input ranges: 3 to 32 VDC, 10 to 90 VAC/DC and

90 to 280 VAC/DC

•Insulation: OPTO (input-output) 4000 VACrms

Product Description

The zero switching relay with

antiparallel thyristor output is

the most widely used indus-

trial SSR due to its multiple

application possibilities. The

relay can be used for resis-

Solid State Relay

Switching mode

Rated operational voltage

Rated operational current

Control voltage

Non-rep. peak voltage

Ordering Key

Solid State Relays

tive, inductive and capacitive

loads. The zero switching re-

lay switches ON when the

sine curve just crosses zero

and switches OFF when the

current cr osses zer o.

Type Selection

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

voltage current

A: Zero switching 24: 230 VACrms 10: 10 AACrms -D: 3 to 32 VDC 06: 650 Vp

44: 400 VACrms 25: 25 AACrms LA: 10 to 90 VAC/DC 08: 850 Vp

48: 480 VACrms 50: 50 AACrms HA: 90 to 280 VAC/DC 12: 1200 Vp

90: 90 AACrms

Selection Guide

Rated opera- Non-rep. Control voltage Rated operational current

tional voltage voltage 10 AACrms 25 AACrms 50 AACrms 90 AACrms

3 to 32 VDC RA 2410 -D 06 RA 2425 -D 06 RA 2450 -D 06 RA 2490 -D 06

230 VACrms 650 Vp10 to 90 VAC/DC RA 2410 LA 06 RA 2425 LA 06 RA 2450 LA 06 RA 2490 LA 06

90 to 280 VAC/DC RA 2410 HA 06 RA 2425 HA 06 RA 2450 HA 06 RA 2490 HA 06

3 to 32 VDC RA 4410 -D 08 RA 4425 -D 08 RA 4450 -D 08 RA 4490 -D 08

400 VACrms 850 Vp10 to 90 VAC/DC RA 4410 LA 08 RA 4425 LA 08 RA 4450 LA 08 RA 4490 LA 08

90 to 280 VAC/DC RA 4410 HA 08 RA 4425 HA 08 RA 4450 HA 08 RA 4490 HA 08

3 to 32 VDC RA 4810 -D 12 RA 4825 -D 12 RA 4850 -D 12 RA 4890 -D 12

480 VACrms 1200 Vp10 to 90 VAC/DC RA 4810 LA 12 RA 4825 LA 12 RA 4850 LA 12 RA 4890 LA 12

90 to 280 VAC/DC RA 4810 HA 12 RA 4825 HA 12 RA 4850 HA 12 RA 4890 HA 12

Industrial, 1-Phase ZS, Standard Range

Types RA 24.. .. 06/RA 44.. .. 08/RA 48.. .. 12

RA 24 10 LA 06

Specifications are subject to change without notice (30.09.2005) 2-61

RA 24.. .. 06, RA 44.. .. 08, RA 48.. .. 12

RA 24.. .. 06 RA 44.. .. 08 RA 48.. .. 12

Operational voltage range 24 to 280 VACrms 42 to 480 VACrms 42 to 530 VACrms

Non-rep. peak voltage ≥650 Vp≥850 Vp≥1200 Vp

Zero voltage turn-on ≤20 V ≤40 V ≤40 V

Operational frequency range 45 to 65 Hz 45 to 65 Hz 45 to 65 Hz

Power factor ≥0.5 @ 230 VACrms ≥ 0.5 @ 400 VACrms ≥ 0.5 @ 480 VACrms

Approvals UL, CSA UL, CSA UL, CSA

General Specifications

RA .... -D .. RA .... LA .. RA .... HA ..

Control voltage range 3 to 32 VDC 10 to 90 VAC/DC 90 to 280 VAC/DC

Pick-up voltage ≤3 VDC ≤10 VAC/DC ≤90 VAC/DC

Drop-out voltage ≥1 VDC ≥1 VAC/DC ≥10 VAC/DC

Reverse voltage ≤32 VDC

Input impedance 1.5 kΩ5.4 kΩ44 kΩ

Response time pick-up ≤1/2 cycle ≤1 cycle ≤1 cycle

Control pulse width ≥0.5 ms ≥0.5 ms ≥0.5 ms

Response time drop-out ≤1/2 cycle ≤1/2 cycle ≤1/2 cycle

Input Specifications

Output Specifications

RA ..10 .. .. RA ..25 .. .. RA ..50 .. .. RA ..90 .. ..

Rated operational current AC 51 16 Arms 25 Arms 50 Arms 90 Arms

A C 53a 3 Arms 5 Arms 15 Arms 20 Arms

Minimum operational current 20 mArms 20 mArms 20 mArms 20 mArms

Rep. overload current t=1 s ≤35 Arms ≤55 Arms ≤125 Arms ≤150 Arms

Non-rep. surge current t=10 ms 160 Ap300 Ap580 Ap1150 Ap

Off-state leakage current

@ rated voltage and frequency ≤2.5 mArms ≤3 mArms ≤3 mArms ≤3 mArms

I2t for fusing t=1-10 ms ≤130 A2s≤450 A2s≤1680 A2s≤6600 A2s

Critical dI/dt ≥50 A/µs ≥50 A/µs ≥50 A/µs ≥100 A/µs

On-state voltage drop

@ rated current ≤1.6 Vrms ≤1.6 Vrms ≤1.6 Vrms ≤1.6 Vrms

Critical dV/dt commutating ≥500 V/µs ≥500 V/µs ≥500 V/µs ≥500 V/µs

Critical dV/dt off-state ≥500 V/µs ≥500 V/µs ≥500 V/µs ≥500 V/µs

RA ..10 .. .. RA ..25 .. .. RA ..50 .. .. RA ..90 .. ..

Operating temperature -20°to +70°C -20°to +70°C -20°to +70°C -20°to +70°C

(-4° to +158°F) (-4° to +158°F) (-4° to +158°F) (-4° to +158°F)

Storage temperature -40°to +100°C -40°to +100°C -40°to +100°C -40°to +100°C

(-40° to +212°F) (-40° to +212°F) (-40° to +212°F) (-40° to +212°F)

Junction temperature ≤125°C (≤257°F) ≤125°C (≤257°F) ≤125°C (≤257°F) ≤125°C (≤257°F)

Rth junction to case ≤2.0 K/W ≤1.25 K/W ≤0.65 K/W ≤0.3 K/W

Rth junction to ambient ≤12.5 K/W ≤12 K/W ≤12 K/W ≤12 K/W

Thermal Specifications

2-62 Specifications are subject to change without notice (30.09.2005)

RA 24.. .. 06, RA 44.. .. 08, RA 48.. .. 12

Rated insulation voltage

Input to output ≥4000 VACrms

Rated insulation voltage

Output to case ≥4000 VACrms

Insulation resistance

Input to output ≥1010 Ω

Insulation resistance

Ouput to case ≥1010 Ω

Insulation capacitance

Input to output ≤8 pF

Insulation capacitance

Output to case ≤100 pF

Insulation

Wiring Diagram Functional Diagram

Control

input

Mains input/load output

Control

input Line/load

All dimensions in mm

Dimensions

Load output/mains input

Weight Approx. 110 g

Housing material Noryl GFN 1, black

Base plate 10, 25, 50 A Aluminium, nickel-plated

90 A Copper, nickel-plated

Potting compound Polyurethane

Relay

Mounting screws M5

Mounting torque ≤1.5 Nm

Control terminal

Mounting screws M3 x 6

Mounting torque ≤0.5 Nm

Power terminal

Mounting screws M5 x 6

Mounting torque ≤2.4 Nm

Housing Specifications

** = ±0.4 mm

***= ±0.5 mm **

***

*** ***

***

Accessories

Protection cover

Heatsinks

DIN rail adapter

Varistors

Fuses

For further information refer

to "General Accessories".

Specifications are subject to change without notice (30.09.2005) 2-63

RA 24.. .. 06, RA 44.. .. 08, RA 48.. .. 12

Heatsink Dimensions (load current versus ambient temperature)

Load

current [A] Thermal resistance

[K/W]

Ambient temp. [°C]

Power

dissipation [W] Power

dissipation [W]

2 1.7 1.4 1 0.71 0.40 32

2.5 2.1 1.8 1.4 1 0.66 27

3.1 2.7 2.3 1.9 1.4 1 23

4. 3.5 3 2.5 2 1.4 20

4.9 4.3 3.7 3.1 2.5 1.9 16

6.2 5.4 4.6 3.9 3.1 2.3 13

8.1 7.1 6.1 5.1 4 3 10

11.3 9.9 8.5 7.1 5.6 4.2 7

- 15.6 13.3 11.1 8.9 6.7 5

- - - - 18.7 14 2

20 30 40 50 60 70

22.5

17.5

12.5

7.5

2.5

Ambient temp. [°C]

Load

current [A]

RA ..50 .. ..

Ambient temp. [°C]

Power

dissipation [W]

Thermal resistance

[K/W]

Load

current [A]

Thermal resistance

[K/W]

2.7 2.2 1.8 1.3 0.87 0.41 22

3.1 2.6 2.1 1.7 1.2 0.65 20

3.7 3,1 2.6 2 1.5 0.92 18

4.3 3.7 3.1 2.5 1.9 1.2 16

5 4.3 3.7 3 2.3 1.6 15

5.9 5.1 4.4 3.6 2.8 2.1 13

6.9 6 5.2 4.3 3.5 2.6 12

7.9 6.9 5.9 4.9 4 3 10

10.8 9.5 8.1 6.8 5.4 4.1 7

- 14.2 12.2 10.2 8.1 6.1 5

- - - - 14.6 10.9 3

------1

20 30 40 50 60 70

0.92 0.76 0.60 0.45 0.29 - 63

1.2 0.99 0.80 0.62 0.44 0.26 55

1.5 1.3 1.1 0.85 0.63 0.42 47

1.9 1.6 1.4 1.1 0.89 0.63 40

2.4 2.1 1.8 1.5 1.2 0.91 33

3 2.7 2.3 1.9 1.5 1.1 26

3.9 3.5 3 2.5 2 1.5 20

5.5 4.8 4.1 3.4 2.7 2.1 15

8.6 7.5 6.4 5.4 4.3 3.2 9

17.9 15.6 13.4 11.2 8,9 6.7 4

20 30 40 50 60 70

Thermal resistance

[K/W]

Load

current [A] Power

dissipation [W]

RA ..90 .. ..

Ambient temp. [°C]

0.63 0.53 0.42 0.32 - - 97

0.81 0.69 0.57 0.45 0.33 - 84

1 0.89 0.75 0.61 0.47 0.33 71

1.3 1.2 1 0.83 0.66 0.49 59

1.7 1.5 1.3 1.1 0.85 0.64 47

2.2 1.9 1.7 1.4 1.1 0.83 36

3.1 2.7 2.3 1.9 1.5 1.2 26

4.8 4.2 3.6 3 2.4 1.8 17

10 8.8 7.5 6.3 5 3.8 8

20 30 40 50 60 70

Carlo Gavazzi Heatsink

(see Accessories)

No heatsink required

RHS 100 Assy

RHS 301 Assy

RHS 301 F Assy

Consult your distributor

Heatsink Selection

Thermal resistance

Rth s-a > 12.5 K/W

3.0 K/W

0.8 K/W

0.25 K/W

< 0.25 K/W

Compare the value found in the current versus temperature

chart with the standard heatsink values and select the heat-

sink with the next lower value.

RA ..10 .. .. RA ..25 .. ..

2-64 Specifications are subject to change without notice (30.09.2005)

Applications

Thermal characteristics

The thermal design of Solid

State Relays is very impor-

tant. It is essential that the user

makes sure that cooling is ad-

equate and that the maximum

junction temperature of the re-

lay is not exceeded.

This relay is designed for use

in applications in which it is

exposed to high surge condi-

tions. Care must be taken to

ensure proper heatsinking

when the relay is to be used at

high sustained currents. Ade-

quate electrical connection

between relay terminals and

cable must be ensured.

RA 24.. .. 06, RA 44.. .. 08, RA 48.. .. 12

Heat flow

Heatsink

temperature

Rth j-c Rth c-s Rth s-a

Junction

temperature Case

temperature Ambient

temperature

Thermal resistance:

Rth j-c = junction to case

Direct bonding

In the design of the output

power semiconductor direct

bonding of the copper layer

and the ceramic substrate has

been applied. This is to en-

sure uninhibited heat transfer

and high thermal fatigue

strength.

The relay has been designed

for applications requiring lar-

ge numbers of load cycles.

Power dissipation

The power dissipation for in-

termittent use is calculated ac-

cording to the following for-

mula:

ton toff

OFF

Irms = ION2x tON

tON + tOFF

Ex: RA 24 50 -D 06:

Load current = 45 A

tON = 30 s

tOFF = 15 s

Irms =452x 30

30 + 15

The rms current will be

36.7 A.

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 cal-

culated on the basis of the

ambient temperature and the

increase in temperature.

Rth c-s = case to heatsink

Rth s-a = heatsink to ambient