RZ3A60D40

Solid State Relay, 3PST-NO, 40 A, 660 VAC, Panel Mount, Screw, Zero Crossing

⚠️ 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
Product type:
Contact Configuration:3PST-NO; Load Current:40A; Operating Voltage Max:660VAC; Relay Mounting:Panel; Relay Terminals:Screw; Switching Mode:Zero Crossing; Operating Voltage Min:42VAC; Control Voltage Min
SVHC: No SVHC (21-Jan-2025)
Load Current: 40A
Product Range: RZ3A Series
Relay Mounting: Panel Mount
Switching Mode: Zero Crossing
Relay Terminals: Screw
Control Voltage Max: 32VDC
Control Voltage Min: 4VDC
Contact Configuration: 3PST-NO
Operating Voltage Max: 660VAC
Operating Voltage Min: 42VAC

Delivery and price
Units per pack	1
Price	170.5 €
Current stock	10+
Lead time	30 days

Datasheet

## **Solid State Relays Industrial, 3-Phase ZS Type RZ3A** 

- **3-phase Solid State Relay** 

- **Zero switching** 

- **Rated operational current: 3 x 25, 40, 55 or 75 A** 

- **Rated operational voltage: Up to 600 VAC** 

- **Control voltage 5 VDC, 4-32 VDC or 20-275 VAC/DC** 

- **Integral snubber networks** 

- **Over-temperature protection option with alarm output** 

- **IP 10 back-of-hand protection** 

- **LED indication of control input and over-temperature alarm status** 

**Product Descriptionptiontion** 

**Product Descriptionptiontion Ordering Key RZ 3 A 60 D 75  P** A Solid State Relay family AC- or DC-controlled versions **Solid State Relay** designed to switch various are available. Built-in LED sta- **Number of poles** loads such as heating eletus indication for applied con- **Switching mode** ments, motors and transformtrol voltage and over-tempera- **Rated opertional voltage** ers. The relay is capable  of ture alarm (optional). A version **Control voltage** ~~a~~ switching high voltages up to that can be controlled with 5 **Rated opertional current** 600 VACrms. VDC @ 15 mA (max) is also **Options** available (LD). 

For higher reliability and load cycle capability three semiThe series covers a range of conductor power units are solload currents up to 75 AACrms. dered directly on to the direct copper bonded (DCB) substrate. 

## **Type Selection** 

|**Switching**|**Rated operational**|**Rated operational**|**Control**|**Option**|
|---|---|---|---|---|
|**mode**|**voltage**|**current**|**voltage**||
|A: Zero Switching|40: 400 VACrms|25: 25 AACrms|LD: 5 VDC|P: Over-|
||60: 600 VACrms|40: 40 AACrms|D: 4-32 VDC|temperature|
|||55: 55 AACrms|A: 24-275 VAC/24-50 VDC|protection and|
|||75: 75 AACrms||alarm output|
|||||(available only for A and D input)|



## **Selection Guide** 

|**Rated operational**|**Control**|**Rated operational current**|**Rated operational current**|||
|---|---|---|---|---|---|
|**voltage**|**voltage**|**25 A**|**40 A**|**55 A**|**75 A**|
|400 VACrms|5 VDC|**RZ3A40LD25**|**RZ3A40LD40**|**RZ3A40LD55**|**RZ3A40LD75**|
||4-32 VDC|**RZ3A40D25**|**RZ3A40D40**|**RZ3A40D55**|**RZ3A40D75**|
||24-275 VAC/24-50 VDC|**RZ3A40A25**|**RZ3A40A40**|**RZ3A40A55**|**RZ3A40A75**|
|600 VACrms|5 VDC|**RZ3A60LD25**|**RZ3A60LD40**|**RZ3A60LD55**|**RZ3A60LD75**|
||4-32 VDC|**RZ3A60D25**|**RZ3A60D40**|**RZ3A60D55**|**RZ3A60D75**|
||24-275 VAC/24-50 VDC|**RZ3A60A25**|**RZ3A60A40**|**RZ3A60A55**|**RZ3A60A75**|



## **Options** 

Protection: Over-temperature protection and alarm output: add suffix P to include over-temperature protection and alarm output. Example: RZ3A60D75P 

**1** 

Specifications are subject to change without notice (30.08.2002) 

**RZ3A** 

## **General Specifications** 

||**RZ3A40..**||**RZ3A60..**|
|---|---|---|---|
|Operational voltage ranges|24-440 VAC||42-660 VAC|
|Non-rep.peak voltage|850 Vp||1200 Vp|
|Operational frequencyrange|45 to 65 Hz||45 to 65 Hz|
|Overvoltage category|III||III|
|Pollution degree|3||2|
|Approvals*|UL,CSA||UL,CSA|
|CE-marking|Yes||Yes|



*Approvals pending 

## **Input Specifications** 

||**RZ3A..LD..**||**RZ3A..D..**||**RZ3A..A..**|
|---|---|---|---|---|---|
|Control voltage range|5 VDC||4-32 VDC||24-50 VDC/24-275VAC|
|Pick-up voltage|4.5 VDC||3.8 VDC||18 VAC/20 VDC|
|Drop-out voltage|1.2 VDC||1.2 VDC||9 VAC|
|Input current|≤15 mA||≤23 mA||≤15 mA|
|Response time pick-up||||||
|Power output=50 Hz|10 ms||10 ms||20 ms|
|Response time drop-out||||||
|Power output = 50 Hz|10 ms||10 ms||30 ms|
|All data at 25°C||||||



## **Output Specifications** 

|Rated operational current|**RZ3A..25..**|**RZ3A..40..**|**RZ3A..55..**<br>**RZ3A..75..**|
|---|---|---|---|
|AC51 @ Ta=25°C|25 Arms|40 Arms|55 Arms<br>75 Arms|
|AC53a@Ta=25°C|5 Arms|8 Arms|15 Arms<br>20 Arms|
|Minimum operational current|150 mArms|150 mArms|150 mArms<br>150 mArms|
|Rep. overload current t=1 s|37 Arms|60 Arms|< 125 Arms<br>< 150 Arms|
|Non-rep. surge currentt = 10 ms|230 Ap|300 Ap|600 Ap<br>1000 Ap|
|Off-state leakage current|< 3 mArms|< 3 mArms|< 3 mArms<br>< 3 mArms|
|I2t for fusingt = 10 ms|265 A2s|450 A2s|1800 A2s<br>6600 A2s|
|Critical dI/dt@50 Hz|≥100 A/µs|≥100 A/µs|≥100 A/µs<br>≥100 A/µs|
|On-state voltage drop|≤1.6 Vrms|≤1.6 Vrms|≤1.6 Vrms<br>≤1.6 Vrms|
|Critical dV/dt off-state|≥500 V/µs|≥500 V/µs|≥500 V/µs<br>≥500 V/µs|



## **Alarm Output Specifications** 

## **Thermal Specifications** 

|Collector - emitter voltage|35 Vdc|
|---|---|
|Emitter - collector voltage|6 Vdc|
|Collector current|50 mA|
|Delay time on reset|20 mS|



|Operatingtemperature|-30° to +80°C(-22° to +158° F)|
|---|---|
|Storage temperature|-40° to +100°C(-40° to + 212° F)|
|Junction temperature|≤+125°C (+ 257˚F)|



## **Insulation** 

Rated insulation voltage Input to output ≥ 4000 VACrms Output to case ≥ 4000 VACrms 

**2** 

Specifications are subject to change without notice (30.08.2002) 

**RZ3A** 

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

## **RZ ..25** 

## **RZ ..40** 

|**25.0**<br>**22.5**<br>**20.0**<br>**17.5**<br>**15.0**<br>**12.5**<br>**10.0**<br>**7.5**<br>**5.0**<br>**2.5**|||||||||**92**<br>**80**<br>**68**<br>**58**<br>**47**<br>**38**<br>**29**<br>**21**<br>**13**<br>**6**|
|---|---|---|---|---|---|---|---|---|---|
||**0.44**|**0.34**|**0.23**||**0.12**|**0.01**|**--**|**--**||
||**0.62**<br>**0.84**|**0.49**<br>**0.69**|**0.37**<br>**0.54**||**0.24**<br>**0.40**|**0.12**<br>**0.25**|**--**<br>**0.10**|**--**<br>**--**||
||**1.12**<br>**1.51**<br>**2.06**|**0.95**<br>**1.30**<br>**1.80**|**0.78**<br>**1.09**<br>**1.54**||**0.60**<br>**0.88**<br>**1.27**|**0.43**<br>**0.67**<br>**1.01**|**0.25**<br>**0.46**<br>**0.75**|**0.08**<br>**0.25**<br>**0.48**||
||**2.75**<br>**3.83**<br>**6.01**|**2.40**<br>**3.35**<br>**5.26**|**2.06**<br>**2.87**<br>**4.51**||**1.72**<br>**2.39**<br>**3.76**|**1.37**<br>**1.91**<br>**3.01**|**1.03**<br>**1.43**<br>**2.25**|**0.69**<br>**0.96**<br>**1.50**||
||**12.62 **|**11.04**|**11.04 9.46**||**7.89**|**6.31**|**4.73**|**3.15**||



|**40.0**<br>**36.0**<br>**32.0**<br>**28.0**<br>**24.0**<br>**20.0**<br>**16.0**<br>**12.0**<br>**8.0**<br>**4.0**|||||||||**101**<br>**91**<br>**80**<br>**70**<br>**60**<br>**49**<br>**39**<br>**29**<br>**19**<br>**10**|
|---|---|---|---|---|---|---|---|---|---|
||**0.54**|**0.44**|**0.34**||**0.24**|**0.14**|**0.04**|**--**||
||**0.66**<br>**0.81**|**0.55**<br>**0.68**|**0.44**<br>**0.56**||**0.33**<br>**0.43**|**0.22**<br>**0.31**|**0.11**<br>**0.18**|**--**<br>**0.06**||
||**1.00**<br>**1.26**<br>**1.62**|**0.86**<br>**1.09**<br>**1.42**|**0.72**<br>**0.93**<br>**1.21**||**0.57**<br>**0.76**<br>**1.01**|**0.43**<br>**0.59**<br>**0.81**|**0.29**<br>**0.42**<br>**0.61**|**0.14**<br>**0.25**<br>**0.41**||
||**2.03**<br>**2.72**<br>**4.11**|**1.78**<br>**2.38**<br>**3.59**|**1.52**<br>**2.04**<br>**3.08**||**1.27**<br>**1.70**<br>**2.57**|**1.02**<br>**1.36**<br>**2.05**|**0.76**<br>**1.02**<br>**1.54**|**0.64**<br>**1.03**<br>**1.81**||
||**8.26**|**7.22**|**6.19**||**5.16**|**4.13**|**3.10**|**4.14**||



## **RZ ..75** 

## **RZ ..55** 

|**RZ ..55**||||**RZ ..75**||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|Load<br>current [A]<br>Thermal<br>resistance [K/W]|||Power<br>dissipation [W]|Load<br>current [A]|Thermal<br>resistance [K/W]||||||Power<br>dissipation [W]|
|||||||||||||
|**55.0**<br>**0.29**<br>**0.23**<br>**0.17**<br>**0.11**<br>**50.0**<br>**0.36**<br>**0.29**<br>**0.22**<br>**0.16**<br>**45.0**<br>**0.44**<br>**0.36**<br>**0.29**<br>**0.21**<br>**40.0**<br>**0.54**<br>**0.46**<br>**0.37**<br>**0.29**<br>**35.0**<br>**0.67**<br>**0.58**<br>**0.48**<br>**0.38**<br>**30.0**<br>**0.85**<br>**0.74**<br>**0.62**<br>**0.51**<br>**25.0**<br>**1.10**<br>**0.96**<br>**0.82**<br>**0.68**<br>**20.0**<br>**1.38**<br>**1.21**<br>**1.04**<br>**0.87**<br>**15.0**<br>**1.85**<br>**1.62**<br>**1.39**<br>**1.16**<br>**10.0**<br>**2.80**<br>**2.45**<br>**2.10**<br>**1.75**<br>**5.0**<br>**5.62**<br>**4.92**<br>**4.21**<br>**3.51**<br>**2.5**<br>**11.26**<br>**9.85**<br>**8.45**<br>**7.04**<br>**20**<br>**30**<br>**40**<br>**50**<br>**Carlo Gavazzi Heatsink**<br>(see Accessories)<br>**Heatsink Selection**|**0.05**<br>**--**<br>**0.09**<br>**0.02**<br>**0.14**<br>**0.06**<br>**0.20**<br>**0.12**<br>**0.28**<br>**0.19**<br>**0.39**<br>**0.28**<br>**0.55**<br>**0.41**<br>**0.69**<br>**0.52**<br>**0.93**<br>**0.70**<br>**1.40**<br>**1.05**<br>**2.81**<br>**2.11**<br>**5.63**<br>**4.22**<br>**60**<br>**70**<br>**Thermal resistance**||**--**<br>**164**<br>**--**<br>**148**<br>**--**<br>**133**<br>**0.03 118**<br>**0.09 103**<br>**0.16**<br>**87**<br>**0.27**<br>**73**<br>**0.35**<br>**58**<br>**0.46**<br>**43**<br>**0.70**<br>**29**<br>**1.40**<br>**14**<br>**2.82**<br>**7**<br>**80**<br>Ambient temp [°C]<br>**TA**<br>**Thermal resistance**|**75.0**<br>**0.27**<br>**0.22**<br>**0.17**<br>**0.12**<br>**0.07**<br>**0.02**<br>**--**<br>**201**<br>**70.0**<br>**0.32**<br>**0.27**<br>**0.21**<br>**0.16**<br>**0.10**<br>**0.05**<br>**--**<br>**184**<br>**65.0**<br>**0.38**<br>**0.32**<br>**0.26**<br>**0.20**<br>**0.14**<br>**0.08**<br>**0.02 167**<br>**60.0**<br>**0.44**<br>**0.38**<br>**0.31**<br>**0.25**<br>**0.18**<br>**0.11**<br>**0.05 151**<br>**55.0**<br>**0.52**<br>**0.45**<br>**0.38**<br>**0.30**<br>**0.23**<br>**0.16**<br>**0.08 136**<br>**50.0**<br>**0.62**<br>**0.54**<br>**0.45**<br>**0.37**<br>**0.29**<br>**0.21**<br>**0.12 121**<br>**45.0**<br>**0.74**<br>**0.64**<br>**0.55**<br>**0.46**<br>**0.36**<br>**0.27**<br>**0.17 106**<br>**40.0**<br>**0.87**<br>**0.76**<br>**0.65**<br>**0.54**<br>**0.43**<br>**0.32**<br>**0.22**<br>**92**<br>**35.0**<br>**1.01**<br>**0.89**<br>**0.76**<br>**0.63**<br>**0.51**<br>**0.38**<br>**0.25**<br>**79**<br>**30.0**<br>**1.21**<br>**1.06**<br>**0.91**<br>**0.76**<br>**0.60**<br>**0.45**<br>**0.30**<br>**66**<br>**25.0**<br>**1.49**<br>**1.30**<br>**1.11**<br>**0.93**<br>**0.74**<br>**0.56**<br>**0.37**<br>**54**<br>**20.0**<br>**1.90**<br>**1.67**<br>**1.43**<br>**1.19**<br>**0.95**<br>**0.71**<br>**0.48**<br>**42**<br>**15.0**<br>**2.60**<br>**2.28**<br>**1.95**<br>**1.63**<br>**1.30**<br>**0.98**<br>**0.65**<br>**31**<br>**10.0**<br>**4.01**<br>**3.51**<br>**3.01**<br>**2.51**<br>**2.01**<br>**1.50**<br>**1.00**<br>**20**<br>**5.0**<br>**8.24**<br>**7.21**<br>**6.18**<br>**5.15**<br>**4.12**<br>**3.09**<br>**2.06**<br>**10**<br>**20**<br>**30**<br>**40**<br>**50**<br>**60**<br>**70**<br>**80**<br>Ambient temp [°C]<br>**TA**<br>Baa||||||||
|No heatsink required<br>RHS 300 Assy or backplate<br>RHS 112 Assy<br>RHS 301 Assy<br>RHS 112 F Assy<br>RHS 301 F Assy<br>Consult your distributor|**Rth s-a**||> 8.0<br>K/W<br>5.0<br>K/W<br>1.1<br>K/W<br>0.8 K/W<br>0.4<br>K/W<br>0.25 K/W<br>< 0.25 K/W|||||||||



|||||||||**164**<br>**148**<br>**133**<br> **118**<br> **103**<br>**87**<br>**73**<br>**58**<br>**43**<br>**29**<br>**14**<br>**7**|
|---|---|---|---|---|---|---|---|---|
|**0.29**|**0.23**|**0.17**||**0.11**|**0.05**|**--**|**--**||
|**0.36**<br>**0.44**|**0.29**<br>**0.36**|**0.22**<br>**0.29**||**0.16**<br>**0.21**|**0.09**<br>**0.14**|**0.02**<br>**0.06**|**--**<br>**--**||
|**0.54**<br>**0.67**<br>**0.85**|**0.46**<br>**0.58**<br>**0.74**|**0.37**<br>**0.48**<br>**0.62**||**0.29**<br>**0.38**<br>**0.51**|**0.20**<br>**0.28**<br>**0.39**|**0.12**<br>**0.19**<br>**0.28**|**0.03 **<br>**0.09 **<br>**0.16**||
|**1.10**<br>**1.38**<br>**1.85**|**0.96**<br>**1.21**<br>**1.62**|**0.82**<br>**1.04**<br>**1.39**||**0.68**<br>**0.87**<br>**1.16**|**0.55**<br>**0.69**<br>**0.93**|**0.41**<br>**0.52**<br>**0.70**|**0.27**<br>**0.35**<br>**0.46**||
|**2.80**<br>**5.62**<br>**11.26**|**2.45**<br>**4.92**<br>**9.85**|**2.10**<br>**4.21**<br>**8.45**||**1.75**<br>**3.51**<br>**7.04**|**1.40**<br>**2.81**<br>**5.63**|**1.05**<br>**2.11**<br>**4.22**|**0.70**<br>**1.40**<br>**2.82**||



## **Heatsink Selection** 

**3** 

Specifications are subject to change without notice (30.08.2002) 

**RZ3A** 

## **Functional Diagram** 

**==> picture [448 x 653] intentionally omitted <==**

**----- Start of picture text -----**<br>
(A1)<br>(A1)(~)(+) renseenceeceeeneennesnesentenstnnmennnennen Regulation ZC T1 (~)(+) —— Regulation git ZC “a T1Output A<br>Output A<br>a L1<br>i{| : zl ? L1 nee L .<br>T2<br>T2 Control ZC Output B<br>Control ZC Output B input<br>input AC/DC L2<br>AC/DC L2<br>T3<br>a ZC T3Output C (A2) ca Coola ZC ' Output C<br>(A2) el | (~) 4 F | L3<br>(~) L3 (-) ZC - Zero Crossing<br>(-) g ZC - Zero Crossing J $<br>(B2)<br>(+)<br>Alarm Over temp<br>Output circuit<br>(B2) Reel es<br>(-) | [fies] al<br>g Specifications  Specifications pecifications ecifications  Dimensions<br>Approx. 380 g<br>a Noryl ee ee ral -6xM5<br>Aluminum, nickel-plated<br>Copper, nickel-plated<br>g compound Polyurethane<br>M5<br>g torque ≤ 1.5 Nm<br>______—s ccc enerT | | ||)[For iOCCT tin<br>M3<br>≤ 0.5 Nm ao 7 G<br>Max. 2 x 2.5 mm [2] > @ — [ae (| Heglsink<br>Min. 2 x 1.0 mm [2]<br>= = = = = = ==— lh ae i [am Compound<br>M5 e) | ®<br>≤ 2.5 Nm<br>2 x 6 mm [2] (AWG8) i el| Ooae 4<br>Max.Min. 2 x 6 mm2 x 1 mm [2][2] |a76|<br>put Connectionut Connection<br>Vcc Vcc<br>To Over-temperature To Over-temperature<br>Protection circuit PULL UP Protection circuit<br>RES 1 6 B1 (+)<br>B1 (+)<br>Output 2 4<br>1 6 B2 (-)<br>Output<br>2 4 B2 (-) RESPULL UP<br>|e GND GND<br>Active Low Active High<br>On Alarm goes Low On Alarm goes High<br>**----- End of picture text -----**<br>


## **Housing Specifications  Specifications pecifications ecifications** 

|Weight<br>Approx. 380 gpprox. 380 grox. 380 gg<br>Material<br>Norylyll<br>Base plate<br>~~—T!|_.WJToT__~~<br>~~ee~~<br>~~a~~|
|---|
|25, 40, 55A<br>Aluminum, nickel-plated|
|75A<br>Copper, nickel-platedpper, nickel-plateder, nickel-plated, nickel-platednickel-platedplatedlated|
|Potting compoundcompoundpoundound<br>Polyurethaneyurethaneurethane<br>Relay<br>Mounting screws<br>M5<br>Mounting torquetorquequeue<br>≤1.5 Nm<br>Control terminal<br>Mounting screws<br>M3<br>Mounting torque<br>≤0.5 Nm<br>Wire size<br>Max.<br>2 x 2.5 mm[2]<br>Min.<br>2 x 1.0 mm[2]<br>Power terminal<br>Mounting screws<br>M5<br>Mounting torque<br>≤2.5 Nm<br>2 x 6 mm[2] (AWG8)<br>Wire size<br>Max.Min.<br>2 x 6 mm2 x 1 mm[2][2]<br>Min.<br>2 x 1 mm[2]<br>~~______—s ccc~~<br>~~ee~~<br>~~= = = = = = ==~~<br>~~= ==— ==—=— lh~~|



## **Alarm Output Connectionut Connection** 

**4** 

Specifications are subject to change without notice (30.08.2002)

Updated at June 10, 2026

Founded in Milan in 1931, Carlo Gavazzi is a globally recognized leader in the design and manufacture of high-quality automation components. For nearly a century, the company has driven technological innovation in the industrial and building automation markets. With ISO 9001-certified production facilities across Europe and Asia, Carlo Gavazzi delivers state-of-the-art solutions tailored for demanding applications, including HVAC, renewable energy, semiconductor manufacturing, and electric vehicle charging infrastructure. Our extensive portfolio of Carlo Gavazzi components focuses heavily on their industry-leading switching and sensing technologies. We carry a comprehensive selection of solid state relays, contactors, and power relays engineered for exceptional reliability and thermal performance. Alongside these robust switching solutions, our range features a wide array of precision sensors, with a strong emphasis on proximity switches and light sensors that are critical for automated manufacturing processes, mobile equipment, and access control systems. Beyond core sensing and switching, the Carlo Gavazzi lineup extends into essential power management, circuit protection, and control devices. This includes highly efficient AC/DC converters, thermal magnetic circuit breakers, and advanced panel instrumentation designed to monitor and optimize energy efficiency. From current sensing transformers to motor starters, engineers consistently trust Carlo Gavazzi to provide competitive, dependable, and forward-thinking components for their most complex automation challenges.

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