RA4825HA12

SSR-INDUSTRIAL MT. SSR ZERO SW 480V

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
Manufacturer: CARLO GAVAZZI / PARTNER STOCK
Product type:
SVHC: No SVHC (07-Nov-2024)
Product Range: RA48 Series
Delivery and price
Units per pack	3
Price	87.3 €
Current stock	25+
Lead time	30 days
Datasheet
## **Solid State Relays Industrial, 1-Phase ZS, Standard Range Types RA 24.. .. 06/RA 44.. .. 08/RA 48.. .. 12** 

- **AC Solid State Relay** 

- **Zero switching** 

- **Direct copper bonding technology** 

- **Rated operational current: 25, 50 and 90 AACrms** 

- **Blocking 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** 

- **Isolation: OPTO (input-output) 4000 VACrms** 

## **Product Descri tion p** 

## **Orderin Ke g y** 

## **RA 24 25 LA 06** 

The zero switching relay with tive, inductive and capacitive **Solid State Relay** antiparallel thyristor output is loads. The zero switching re- **Switching mode** the most widely used induslay switches ON when the **Rated operational voltage** trial SSR due to its multiple sine curve just crosses zero **Rated operational current** application possibilities. The and switches OFF when the **Control voltage** relay can be used for resiscurrent crosses zero. **Blocking voltage** 

## **T e Selection yp** 

|**Switching mode**|**Rated operational**|**Rated operational**|**Control voltage**|**Control voltage**|**Blocking voltage**|
|---|---|---|---|---|---|
||**voltage**|**current**||||
|A: Zero switching|24: 230 VACrms|25: 25 AACrms|-D:|3 to 32 VDC|06: 650 Vp|
||44: 400 VACrms|50: 50 AACrms|LA: 10 to 90 VAC/DC|LA: 10 to 90 VAC/DC|08: 850 Vp|
||48: 480 VACrms|90: 90 AACrms|HA: 90 to 280 VAC/DC|HA: 90 to 280 VAC/DC|12: 1200 Vp|



## **Selection Guide** 

|**Rated opera-**|**Blocking**|**Control voltage**|**Rated operational current**|**Rated operational current**||
|---|---|---|---|---|---|
|**tional voltage**|**voltage**||**25 AACrms**|**50 AACrms**|**90 AACrms**|
|||3 to 32 VDC|**RA 2425 -D 06**|**RA 2450 -D 06**|**RA 2490 -D 06**|
|230 VACrms|650 Vp|10 to 90 VAC/DC|**RA 2425 LA 06**|**RA 2450 LA 06**|**RA 2490 LA 06**|
|||90 to 280 VAC/DC|**RA 2425 HA 06**|**RA 2450 HA 06**|**RA 2490 HA 06**|
|||3 to 32 VDC|**RA 4425 -D 08**|**RA 4450 -D 08**|**RA 4490 -D 08**|
|400 VACrms|850 Vp|10 to 90 VAC/DC|**RA 4425 LA 08**|**RA 4450 LA 08**|**RA 4490 LA 08**|
|||90 to 280 VAC/DC|**RA 4425 HA 08**|**RA 4450 HA 08**|**RA 4490 HA 08**|
|||3 to 32 VDC|**RA 4825 -D 12**|**RA 4850 -D 12**|**RA 4890 -D 12**|
|480 VACrms|1200 Vp|10 to 90 VAC/DC|**RA 4825 LA 12**|**RA 4850 LA 12**|**RA 4890 LA 12**|
|||90 to 280 VAC/DC|**RA 4825 HA 12**|**RA 4850 HA 12**|**RA 4890 HA 12**|



**1** 

Specifications are subject to change without notice (28.04.2015) 

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

## **General S ecifications p** 

||**RA 24.. .. 06**||**RA 44.. .. 08**||**RA 48.. .. 12**|
|---|---|---|---|---|---|
|Operational voltage range|24 to 280 VACrms||42 to 480 VACrms||42 to 530 VACrms|
|Blockingvoltage|≥650 Vp||≥850 Vp||≥1200 Vp|
|Zero voltage turn-on|≤20 V||≤40 V||≤40 V|
|Operational frequencyrange|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|



## **In ut S ecifications p p** 

||**RA .... -D ..**||**RA .... LA ..**||**RA .... HA ..**|
|---|---|---|---|---|---|
|Control voltage range|3 to 32 VDC||10 to 90 VAC/DC||90 to 280 VAC/DC|
|Pick-upvoltage|≤<br>3 VDC||≤<br>10 VAC/DC||≤<br>90 VAC/DC|
|Drop-out voltage|≥1 VDC||≥1 VAC/DC||≥10 VAC/DC|
|Reverse voltage|≤<br>32 VDC|||||
|Input impedance|1.5 kΩ||5.4 kΩ||44 kΩ|
|Response timepick-up|≤<br>1/2 cycle||≤1 cycle||≤1 cycle|
|Controlpulse width|≥0.5ms||≥0.5 ms||≥0.5 ms|
|Response time drop-out|≤1/2 cycle||≤1/2 cycle||≤1/2 cycle|



## **Out ut S ecifications p p** 

||**RA..25 .. ..**||**RA ..50 .. ..**||**RA ..90 .. ..**|
|---|---|---|---|---|---|
|Rated operational current AC 51|25 Arms||50 Arms||90 Arms|
|AC 53a|5 Arms||15 Arms||20 Arms|
|Minimum operational current|150 mArms||250 mArms||400 mArms|
|Rep. overload current t=1 s|≤55 Arms||≤<br>125 Arms||≤150 Arms|
|Non-rep. surge current t=10 ms|325 Ap||600 Ap||1150 Ap|
|Off-state leakage current||||||
|@rated voltage and frequency|≤3 mArms||≤3 mArms||≤3 mArms|
|I2t for fusingt=10 ms|≤525 A2s||≤1800 A2s||≤6600 A2s|
|On-state voltage drop||||||
|@rated current|≤1.6 Vrms||≤1.6 Vrms||≤1.6 Vrms|
|Critical dV/dt commutating|≥500 V/µs||≥500 V/µs||≥500 V/µs|
|Critical dV/dt off-state|≥500 V/µs||≥500 V/µs||≥500 V/µs|



## **Thermal S ecifications p** 

||**RA ..10 .. ..**|**RA ..10 .. ..**||**RA ..25 .. ..**||**RA ..50 .. ..**|**RA ..50 .. ..**||**RA ..90 .. ..**|**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|-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||≤<br>1.25 K/W||≤|0.65 K/W||≤|0.3 K/W|
|Rthjunction to ambient|≤|12.5 K/W||≤<br>12 K/W||≤|12 K/W||≤|12 K/W|



**2** 

Specifications are subject to change without notice (28.04.2015) 

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

## **Isolation** 

|**Isolation**||
|---|---|
|Rated isolation voltage||
|Input to output|≥4000 VACrms|
|Rated isolation voltage<br>Output to case<br>Insulation resistance|≥4000 VACrms|
|Input to output|≥1010 W|
|Insulation resistance||
|Ouput to case|≥1010 W|
|Insulation capacitance||
|Input to output|≤<br>8pF|
|Insulation capacitance||
|Output to case|≤<br>100 pF|



## **Wiring Diagram** 

**==> picture [216 x 15] intentionally omitted <==**

**----- Start of picture text -----**<br>
Control<br>Line/load<br>input<br>**----- End of picture text -----**<br>


## **Dimensions** 

**==> picture [142 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
44.5 **<br>(qT<br>28<br>2XM5<br>O) a<br>** = ± 0.4 mm **<br>*** = ± 0.5 mm n ei Ge son<br>*** ***<br>*** ***<br>**----- End of picture text -----**<br>


## **Accessories** 

For further information refer to "General Accessories". 

Protection cover Heatsinks DIN rail adapter Varistors Fuses 

## **Functional Diagram** 

**==> picture [209 x 114] intentionally omitted <==**

**----- Start of picture text -----**<br>
Mains input/load output<br>@<br>@—+ if<br>Control was a (<br>input<br>Ves Dr :<br>L-/L o- ° eK<br>°<br>@)<br>Load output/mains input<br>**----- End of picture text -----**<br>


## **Housin S ecifications g p** 

~~ee~~ Weight Approx. 110 g ~~=— rc —~~ Housing material Noryl GFN 1, black Base plate 25, 50 A Aluminium, nickel-plated 90 A Copper, nickel-plated ~~_/~~ Potting compound Polyurethane ~~es~~ — — — — — hhhlhlhlhlhlhlhlh)hlCCC—(i‘“CSOSC‘*@ Relay Mounting screws M5 Mounting torque ≤ 1.5 Nm Control terminal Mounting screws M3 x 6 Mounting torque ≤ 0.5 Nm Power terminal ~~ooo~~ Mounting screws M5 x 6 Mounting torque ≤ 2.4 Nm 

All dimensions in mm 

**3** 

Specifications are subject to change without notice (28.04.2015) 

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

## **Heatsink Dimensions (load current versus ambient temperature)** 

## **RA ..25 .. ..** 

## **RA ..50 .. ..** 

|Power<br>dissipation [W]<br>Load<br>current [A]<br>Thermal resistance<br>[K/W]|Power<br>dissipation [W]<br>Load<br>current [A]<br>Thermal resistance<br>[K/W]|dissipation [W]|Power<br>dissipation [W]<br>Thermal resistance<br>[K/W]<br>Load<br>current [A]|Power<br>dissipation [W]<br>Thermal resistance<br>[K/W]<br>Load<br>current [A]|dissipation [W]|
|---|---|---|---|---|---|
|||||||
|**25**<br>**22.5**<br>**20**<br>**17.5**<br>**15**<br>**12.5**<br>**10**<br>**7.5**<br>**5**<br>**2.5**|**2**<br>**1.7**<br>**1.4**<br>**1**<br>**0.71**<br>**0.40**<br>**32**<br>**2.5**<br>**2.1**<br>**1.8**<br>**1.4**<br>**1**<br>**0.66**<br>**27**<br>**3.1**<br>**2.7**<br>**2.3**<br>**1.9**<br>**1.4**<br>**1**<br>**23**<br>**4.**<br>**3.5**<br>**3**<br>**2.5**<br>**2**<br>**1.4**<br>**20**<br>**4.9**<br>**4.3**<br>**3.7**<br>**3.1**<br>**2.5**<br>**1.9**<br>**16**<br>**6.2**<br>**5.4**<br>**4.6**<br>**3.9**<br>**3.1**<br>**2.3**<br>**13**<br>**8.1**<br>**7.1**<br>**6.1**<br>**5.1**<br>**4**<br>**3**<br>**10**<br>**11.3**<br>**9.9**<br>**8.5**<br>**7.1**<br>**5.6**<br>**4.2**<br>**7**<br>**-**<br>**15.6**<br>**13.3**<br>**11.1**<br>**8.9**<br>**6.7**<br>**5**<br>**-**<br>**-**<br>**-**<br>**-**<br>**18.7**<br>**14**<br>**2**<br>~~po~~<br>~~ee~~<br>~~ee~~<br>~~TT~~ oT~~fT~~<br>ee<br>ee<br>ee<br>~~rT TO~~<br>~~rT~~<br>~~ee eee~~<br>~~ee~~<br>rTFO||**50**<br>**45**<br>**40**<br>**35**<br>**30**<br>**25**<br>**20**<br>**15**<br>**10**<br>**5**|**0.92**<br>**0.76**<br>**0.60**<br>**0.45**<br>**0.29**<br>**-**<br>**63**<br>**1.2**<br>**0.99**<br>**0.80**<br>**0.62**<br>**0.44**<br>**0.26**<br>**55**<br>**1.5**<br>**1.3**<br>**1.1**<br>**0.85**<br>**0.63**<br>**0.42**<br>**47**<br>**1.9**<br>**1.6**<br>**1.4**<br>**1.1**<br>**0.89**<br>**0.63**<br>**40**<br>**2.4**<br>**2.1**<br>**1.8**<br>**1.5**<br>**1.2**<br>**0.91**<br>**33**<br>**3**<br>**2.7**<br>**2.3**<br>**1.9**<br>**1.5**<br>**1.1**<br>**26**<br>**3.9**<br>**3.5**<br>**3**<br>**2.5**<br>**2**<br>**1.5**<br>**20**<br>**5.5**<br>**4.8**<br>**4.1**<br>**3.4**<br>**2.7**<br>**2.1**<br>**15**<br>**8.6**<br>**7.5**<br>**6.4**<br>**5.4**<br>**4.3**<br>**3.2**<br>**9**<br>**17.9**<br>**15.6**<br>**13.4**<br>**11.2**<br>**8,9**<br>**6.7**<br>**4**<br>~~**a**~~<br>Pf<br>|ET<br>Pf<br>|<br>tT<br>ee<br>ee<br>~~P|~~<br>~~tl ht~~<br>~~P|~~<br>|<br>tT<br>PF TE<br>PT<br>ETET<br>PFoT<br>ETTET||
||**20**<br>**30**<br>**40**<br>**50**<br>**60**<br>**70**|**TA**||**20**<br>**30**<br>**40**<br>**50**<br>**60**<br>**70**|**TA**|
||Ambient temp. [|Ambient temp. [°C]||Ambient temp. [|Ambient temp. [°C]|



## **RA ..90 .. ..** 

|**90**<br>**80**<br>**70**<br>**60**<br>**50**<br>**40**<br>**30**<br>**20**<br>**10**|||||||**97**<br>**84**<br>**71**<br>**59**<br>**47**<br>**36**<br>**26**<br>**17**<br>**8**<br>~~ee~~<br>lt<br>Tt<br>ee|
|---|---|---|---|---|---|---|---|
||**0.63**<br>~~ee~~<br>P||**0.53**<br>~~ee~~<br>P|<br>tf|**0.42**<br>~~ee~~<br>tf<br>||**0.32**<br>~~ee~~<br>|<br>tl|**-**<br>~~ee~~<br>tllt|**-**<br>~~ee~~<br>lt||
||**0.81**<br>~~ee~~<br>P|<br>Pt|**0.69**<br>~~ee~~<br>P|<br>tf<br>Pt|**0.57**<br>~~ee~~<br>tf<br>||**0.45**<br>~~ee~~<br>|<br>tl|**0.33**<br>~~ee~~<br>tllt|**-**<br>~~ee~~<br>lt||
||**1**<br>P|<br>Pt<br>P||**0.89**<br>P|<br>tf<br>Pt<br>P|<br>||**0.75**<br>tf<br>|<br>|<br>||**0.61**<br>|<br>tl<br>|Tt|**0.47**<br>tllt<br>Tt|**0.33**<br>lt<br>Tt||
||**1.3**<br>Pt<br>P|<br>Pot|**1.2**<br>Pt<br>P|<br>|<br>Pot|**1**<br>|<br>|<br>ee|**0.83**<br>|Tt<br>ee|**0.66**<br>Tt<br>ee|**0.49**<br>Tt<br>ee||
||**1.7**<br>P|<br>ee<br>Pot|**1.5**<br>P|<br>|<br>ee<br>Pot|**1.3**<br>|<br>|<br>ee<br>ee|**1.1**<br>|Tt<br>ee<br>ee|**0.85**<br>Tt<br>ee<br>ee|**0.64**<br>Tt<br>ee<br>ee||
||**2.2**<br>ee<br>Pot<br>P||**1.9**<br>ee<br>Pot<br>|<br>P||**1.7**<br>ee<br>ee<br>|tT|**1.4**<br>ee<br>ee<br>tT|**1.1**<br>ee<br>ee<br>tT|**0.83**<br>ee<br>ee<br>tT||
||**3.1**<br>Pot<br>P|<br>Pot|**2.7**<br>Pot<br>|<br>P|<br>|<br>Pot|**2.3**<br>ee <br>|tT<br>|t|**1.9**<br> ee <br>tT<br>t|**1.5**<br> ee<br>tT<br>tT|**1.2**<br>ee<br>tT<br>T||
||**4.8**<br>P|<br>Pot<br>PF<br>||**4.2**<br>|<br>P|<br>|<br>Pot<br>|<br>|<br>tT|**3.6**<br>|tT<br>|t<br>|<br>|<br>tT<br>t|**3**<br>tT<br>t<br>|**T**<br>t<br>tT|**2.4**<br>tT<br>tT<br>**T**~~t~~<br>tT|**1.8**<br>tT<br>T<br>~~t~~||
||**10**<br>Pot<br>PF<br>||**8.8**<br>|<br>Pot<br>|<br>|<br>tT|**7.5**<br>|t<br>|<br>|<br>tT<br>t|**6.3**<br>t<br>|**T**<br>t<br>tT|**5**<br>tT<br>**T**~~t~~<br>tT|**3.8**<br>T<br>~~t~~||



**4** 

Specifications are subject to change without notice (28.04.2015) 

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

## **Heatsink Selection** 

## **Orderin Ke g y** 

## **RHS..** 

- Heatsinks and fans 

- 5.40[o] C/W to 0.12[o] C/W thermal resistance 

- DIN, panel or thru wall mounting 

- Single or multiple SSR mounting 

## **Heatsink Range Overview:** 

http://www.productselection.net/PDF/UK/ssr_accessories.pdf 

## **Heatsink Selector Tool:** 

http://www.productselection.net/heatsink/heatsinkselector.php?LANG=UK 

**A lications pp** 

This relay is designed for use tant. It is essential that the user **Direct bonding** inexposedapplicationsto highinsurgewhichcondi-it is makesequate sureand thatthat thecoolingmaximumis adpowerIn the designsemiconductorof the outputdirect Irms = ItONON[2] + tx OFFtON tions. ~~a~~ Care must be taken to junction temperature of the rebonding of the copper layer ensure proper heatsinking lay is not exceeded. and the ceramic substrate has when the relay is to be used at been applied. This is to enhigh sustained currents. AdeIf the heatsink is placed in a sure uninhibited heat transfer Ex: RA 24 50 -D 06: quate electrical connection small closed room, control and high thermal fatigue Load current = 45 A between relay terminals and panel or the like, the power strength. tON = 30 s cable must be ensured. dissipation can cause the t OFF = 15 s ambient temperature to rise. The relay has been designed The heatsink is to be calfor applications requiring lar- **Thermal characteristics** culated on the basis of the ge numbers of load cycles. StateThe thermalRelays designis veryofimpor-Solid ambientincrease in temperature.temperature and the Irmsrms = 45[[2]] x 30 

45[[2]] x 30 Irmsrms = 30 + 15 ~~=~~ 

## **Power dissipation** 

The power dissipation for intermittent use is calculated according to the following formula: 

**==> picture [310 x 90] intentionally omitted <==**

**----- Start of picture text -----**<br>
Heat flow<br>cording to the<br>mula:<br>Rth j-c Rth c-s Rth s-a<br>ON<br>OFF<br>Junctiontemperature Casetemperature Heatsinktemperature Ambienttemperature ton toff<br>**----- End of picture text -----**<br>


The rms current will be 36.7 A. 

Thermal resistance: Rth j-c = junction to case 

Rth c-s = case to heatsink 

Rth s-a = heatsink to ambient 

**5** 

Specifications are subject to change without notice (28.04.2015)
Updated at June 10, 2026
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