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RZ3A40A25
Solid State Relay, 3PST-NO, 25 A, 440 VAC, Panel Mount, Screw, Zero Crossing
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- Manufacturer: CARLO GAVAZZI
- Product type:
- SVHC: No SVHC (21-Jan-2025)
- Load Current: 25A
- Product Range: RZ3A Series
- Relay Mounting: Panel Mount
- Switching Mode: Zero Crossing
- Relay Terminals: Screw
- Control Voltage Max: 50VDC
- Control Voltage Min: 24VDC
- Contact Configuration: 3PST-NO
- Operating Voltage Max: 440VAC
- Operating Voltage Min: 24VAC
| Delivery and price | |
|---|---|
| Units per pack | 2 |
| Price | 188.64 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
**RZ3A** ## **RZ3A** ## **3-phase solid state relays** ## • • > ## **Main features** - Zero cross switching 3-phase solid state relay - Ratings up to 690 VAC, 75 AAC - High blocking voltage - DC or AC control voltage - Integrated over voltage protection - Over-temperature protection option with alarm output - LED indication of control input and over-temperature alarm status - UL certified motor ratings ## **Description** The **RZ3A** is a 3-phase, 3-pole switching solid state relay suitable for various industrial loads such as heating elements, motors and transformers. The series covers a range of load currents, up to 75 AAC. The maximum current rating depends on the size of the heatsink to which the solid state relay is mounted. The output is protected against over voltages by means of an integrated varistor. Control ON indication is provided through a green LED. The **RZ3A..P** optionally provides integrated over temperature protection that will protect the solid state relay output against damage from overheating. In case of overheating, an LED indication and alarm output is activated for remote signaling. Specifications are at a surrounding temperature of 25°C unless otherwise specified. ## **Applications** Plastic extrusion machines, thermoforming machines, blow moulding machines, coffee machines, electrical ovens, vending machines, reflow ovens, dryers, climatic chambers, air handling units, plastic sealing machines, shrink tunnels, etc. ## **Main functions** - 3-pole switching AC solid state relay - Rated operational current: 3x 25 AAC, 55 AAC or 75 AAC - Voltage ratings: 400 VAC, 480 VAC, 600 VAC or 690 VAC - 4-32 VDC or 24-275 VAC control voltage **1** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** **References Order code** > **RZ3A** C OOOO Enter the code option instead of . Refer to the selection guide section for valid part numbers. **Code Option Description Notes RZ -** Solid State Relay **3 -** Number of poles **A -** Switching mode: zero cross switching **40** Rated operational voltage: 400 VACrms **48** Rated operational voltage: 480 VACrms **60** Rated operational voltage: 600 VACrms **69** Rated operational voltage: 690 VACrms Available only with 75 A version **D** Control voltage: 4 - 32 VDC **A** Control voltage: 24 - 275 VAC / 24 - 50 VDC Not available with 480 VAC version **25** Rated operational current: 3 x 25 AACrms **55** Rated operational current: 3 x 55 AACrms **75** Rated operational current: 3 x 75 AACrms Not available with 480 and 690 VAC **P** Over-temperature protection and alarm output versions ~~1~~ D **Selection guide RZ3** ~~>~~ |**Rated operational**<br>**voltage**|**Control voltage**|**Maximum rated operational current**|**Maximum rated operational current**|**Maximum rated operational current**| |---|---|---|---|---| |||**3 x 25 AAC**|**3 x 55 AAC**|**3 x 75 AAC**| |400 VACrms|4-32 VDC|**RZ3A40D25**|**RZ3A40D55**|**RZ3A40D75**| ||24-275 VAC / 24-50 VDC|**RZ3A40A25**|**RZ3A40A55**|**RZ3A40A75**| |480 VACrms|4-32 VDC|**RZ3A48D25**|**RZ3A48D55**|**RZ3A48D75**| |600 VACrms|4-32 VDC|**RZ3A60D25**|**RZ3A60D55**|**RZ3A60D75**| ||24-275 VAC / 24-50 VDC|**RZ3A60A25**|**RZ3A60A55**|**RZ3A60A75**| |690 VACrms|4-32 VDC|**-**|**-**|**RZ3A69D75**| ||24-275 VAC / 24-50 VDC|**-**|**-**|**RZ3A69A75**| ## **Selection guide RZ3..P (with over-temperature protection and alarm output)** ~~>~~ |**Rated operational**<br>**voltage**|**Control voltage**|**Maximum rated operational current**|**Maximum rated operational current**|**Maximum rated operational current**| |---|---|---|---|---| |||**3 x 25 AAC**|**3 x 55 AAC**|**3 x 75 AAC**| |400 VACrms|4-32 VDC|**RZ3A40D25P**|**RZ3A40D55P**|**RZ3A40D75P**| ||24-275 VAC / 24-50 VDC|**-**|**RZ3A40A55P**|**RZ3A40A75P**| |600 VACrms|4-32 VDC|**RZ3A60D25P**|**RZ3A60D55P**|**RZ3A60D75P**| ||24-275 VAC / 24-50 VDC|**-**|**RZ3A60A55P**|**RZ3A60A75P**| **2** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** ## **Carlo Gavazzi compatible components** |**Purpose**|**Component name/code**|**Notes**| |---|---|---| |Heatsinks|RHS|Heatsinks and fans| |Thermalpad|RZHT|Packing qty. 10pcs.| ## **Further reading** |**Information**|**Where to find it**| |---|---| |Online heatsink selector tool|**Where to find it**<br>https://www.gavazziautomation.com/en-global/products/solid-state-relays/heat-<br>sink-selector-tool| **3** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **==> picture [38 x 11] intentionally omitted <==** **----- Start of picture text -----**<br> RZ3A<br>**----- End of picture text -----**<br> **==> picture [37 x 37] intentionally omitted <==** **==> picture [467 x 306] intentionally omitted <==** **----- Start of picture text -----**<br> Structure<br>1/L1 2/L2 3/L3<br>B1, B2<br>LED<br>LED<br>2/T1<br>4/T2<br>A1, A2<br>6/T3<br>**----- End of picture text -----**<br> **==> picture [484 x 139] intentionally omitted <==** **----- Start of picture text -----**<br> Element Component Function<br>1/L1, 3/L2, 5/L3 Power connection Mains connection<br>2/T1, 4/T2, 6/T3 Power connection Load connection<br>A1, A2 Control connection Terminals for control voltage<br>Terminals for over-temperature alarm connection (applicable only to<br>B1, B2 Alarm connections “P” suffix option)<br>Green LED Control indicator Indicates presence of control voltage<br>Over-temperature alarm Indicates presence of an over-temperaure condition (applicable only<br>Red LED<br>indicator to “P” suffix option)<br>**----- End of picture text -----**<br> **4** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** ## **Features** ## **General** |**General**<br>>|| |---|---| |**Material**<br>Nor|Noryl,black| |**Potting compound**<br>Pol|Polyurethane| |**Weight**<br>A|Approx. 380g| |**Touchprotection**<br>IP10|IP10| |**Overvoltage category**<br>III|III,6 kV(1.2/50μs)rated impulse withstand voltage| |**Rated isolation voltage**<br>Input to output: 4000 VACrms<br>Out|Input to output: 4000 VACrms<br>Output to case: 4000 VACrms| |**Base plate**<br>25, 55 A: aluminum, nickel-plated<br>75 A: co|25, 55 A: aluminum, nickel-plated<br>75 A: copper,nickel-plated| ## **Dimensions** **==> picture [361 x 362] intentionally omitted <==** **----- Start of picture text -----**<br> 73 .5 mm 4 x M 4 6 x M 5<br>| a A<br>oir Vis ec ee e<br>12 mm 5.3 mm<br>Volee| A1 A2 O duet<br>oOo * ©<br>Heatsink<br>ie) Compound<br>je) i (|<br>ie) | @<br>| ®@<br>fT B1 | Of B2 Oo Un (~All<br>47.6 mm<br>a<br>4 1 mm<br>L3 T3<br>92 mm L2 T2<br>1 03 mm<br>L1 T1<br>**----- End of picture text -----**<br> Control On LED Over-temperature Alarm Trip LED (suffix “P” option) Tolerances +/- 0.5 mm. **5** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** **==> picture [37 x 37] intentionally omitted <==** ## **Performance** ## **Output specifications** **==> picture [483 x 153] intentionally omitted <==** **----- Start of picture text -----**<br> RZ3A..25.. RZ3A..55.. RZ3A..75..<br>Max. operational current ¹: AC-51 25 AAC 55 AAC 75 AAC<br>Max. operational current ¹: AC-53a 6 AAC 12 AAC 19 AAC<br>Minimum operational current 150 mArms 250 mArms 400 mArms<br>Operational frequency range 45 to 65 Hz<br>Rep. overload current t = 1 s 37 Arms < 125 Arms < 150 Arms<br>Leakage current @ rated voltage < 3 mArms<br>Non-repetitive surge current (ITSM), t = 10 ms 325 Ap 600 Ap 1150 Ap<br>I [2] t for fusing (t = 10 ms), minimum 525 A [2] s 1800 A [2] s 6600 A [2] s<br>Power factor >0.5 at rated voltage<br>Critical dV/dt off state min. ≥ 500 V/μs<br>**----- End of picture text -----**<br> ## **Output voltage specifications** **==> picture [483 x 59] intentionally omitted <==** **----- Start of picture text -----**<br> RZ3A40.. RZ3A48.. RZ3A60.. RZ3A69..<br>Operational voltage range 24 - 440 VAC 42 - 530 VAC 42 - 660 VAC 42 - 750 VAC<br>Blocking voltage 800 Vp 1200 Vp 1600 Vp 1600 Vp<br>Output protection [2] Integrated varistor<br>**----- End of picture text -----**<br> ## **Motor ratings: HP (UL508) / kW (EN/IEC 60947-4-2) @ 40°C** **==> picture [483 x 56] intentionally omitted <==** **----- Start of picture text -----**<br> 120 VAC 240 VAC 400 VAC 480 VAC 600 VAC<br>RZ3A..25 0.75 HP / 0.56 kW 1.5 HP / 1.1 kW 3 HP / 2.2 kW 3 HP / 2.2 kW 5 HP / 3.7 kW<br>RZ3A..55 1.5 HP / 1.1 kW 3 HP / 2.2 kW 5 HP / 3.7 kW 7.5 HP / 5.5 kW 10 HP / 7.5 kW<br>RZ3A..75 3 HP / 2.2 kW 5 HP / 3.7 kW 10 HP / 7.5 kW 10 HP / 7.5 kW 15 HP / 11 kW<br>**----- End of picture text -----**<br> ## **Inputs** **==> picture [483 x 94] intentionally omitted <==** **----- Start of picture text -----**<br> RZ3A..D.. RZ3A..A..<br>Control voltage range 4 - 32 VDC 24 - 275 VAC / 24 - 50 VDC<br>Pick-up voltage 3.8 VDC 18 VAC / 20 VDC<br>Drop-out voltage 1.2 VDC 9 VAC / DC<br>Input current ≤ 23 mA ≤ 15 mA<br>Response time pick-up (50 Hz) 10 ms 20 ms<br>Response time drop-out (50 Hz) 10 ms 30 ms<br>**----- End of picture text -----**<br> ## **Alarm output specifications** |**Collector - emitter voltage**|35 VDC| |---|---| |**Emitter - collector voltage**|6 VDC| |**Collector current**|50 mA| |**Delay time on reset**|20 ms| 1. Refer to Heatsink selection section 2. 690 VAC version is CE marked only and does not have an integrated varistor **6** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** **==> picture [40 x 40] intentionally omitted <==** ## **Over-temperature protection (option: ...P)** **==> picture [406 x 181] intentionally omitted <==** **----- Start of picture text -----**<br> SSR Input* 20ms<br>Green LED<br>SSR Output<br>Over-temperature Over-temperature<br>sensing detection<br>Red LED Over-temperature protection is ON<br>SSR output disabled<br>Closed<br>Alarm status<br>Open<br>**----- End of picture text -----**<br> - After over-temperature condition is removed, SSR can be reset by switching OFF the control input for more than 20 ms and switching back ON: this will switch ON the SSR output. ## **Output power dissipation** **==> picture [483 x 250] intentionally omitted <==** **----- Start of picture text -----**<br> 80<br>70<br>60<br>50<br>40 RZ3..25<br>RZ3..55<br>RZ3..75<br>30<br>20<br>10<br>0<br>0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75<br>Load current per pole (AAC)<br>Power dissipation (W)<br>**----- End of picture text -----**<br> ## **Thermal data** **==> picture [484 x 72] intentionally omitted <==** **----- Start of picture text -----**<br> RZ3..25.. RZ3..55 RZ3..75<br>Max. junction temperature 125°C 125°C 125°C<br>Junction to case thermal resistance, Rthjc 0.250°C/W 0.167°C/W 0.117°C/W<br>Case to heatsink thermal resistance, Rthcs [3] 0.067°C/W 0.067°C/W 0.033°C/W<br>Case to heatsink thermal resistance (RZ..HT), Rthcs_HT [4] 0.133°C/W 0.133°C/W 0.067°C/W<br>**----- End of picture text -----**<br> 3. Thermal resistance case to heatsink values are applicable upon application of a fine layer of silicon based thermal paste HTS02S from Electrolube between SSR and heatsink. 4. Thermal resistance case to heatsink values are applicable for the RZHT thermal pad **7** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** **==> picture [37 x 37] intentionally omitted <==** ## **Heatsink selection** ## Thermal resistance [°C/W] of RZ3..25 ## Thermal resistance [°C/W] of RZ3..55 **==> picture [483 x 217] intentionally omitted <==** **----- Start of picture text -----**<br> Surrounding ambient temperature [°C] Surrounding ambient temperature [°C]<br>Load current Load current<br>per pole [A] 20 30 40 50 60 70 80 per pole [A] 20 30 40 50 60 70 80<br>25.0 1.02 0.81 0.61 0.43 0.26 0.10 - 55.0 0.25 0.18 0.12 0.05 - - -<br>22.5 1.29 1.03 0.79 0.57 0.37 0.18 - 50.0 0.35 0.26 0.19 0.11 0.04 - -<br>45.0 0.47 0.37 0.28 0.19 0.10 0.02 -<br>20.0 1.66 1.32 1.02 0.75 0.50 0.28 0.07<br>40.0 0.63 0.51 0.40 0.29 0.19 0.09 -<br>17.5 2.10 1.69 1.33 1.00 0.69 0.41 0.16<br>35.0 0.87 0.71 0.57 0.43 0.30 0.18 0.06<br>15.0 2.73 2.16 1.68 1.26 0.89 0.56 0.26 30.0 1.16 0.97 0.80 0.63 0.47 0.31 0.16<br>12.5 3.84 2.96 2.24 1.64 1.14 0.70 0.33 25.0 1.54 1.28 1.04 0.82 0.61 0.42 0.24<br>20.0 2.23 1.81 1.45 1.12 0.83 0.56 0.32<br>10.0 6.30 4.55 3.28 2.32 1.56 0.94 0.43<br>15.0 3.79 2.96 2.28 1.72 1.24 0.82 0.46<br>7.5 16.05 9.35 5.92 3.83 2.42 1.40 0.62<br>10.0 10.84 7.17 4.92 3.39 2.29 1.44 0.78<br>5.0 nh nh nh 9.91 5.02 2.54 1.03<br>5.0 nh nh nh nh 9.91 4.54 2.02<br>2.5 nh nh nh nh nh 10.66 2.73 2.5 nh nh nh nh nh nh 7.27<br>**----- End of picture text -----**<br> ## Thermal resistance [°C/W] of RZ3..75 **==> picture [235 x 261] intentionally omitted <==** **----- Start of picture text -----**<br> Surrounding ambient temperature [°C]<br>Load current<br>per pole [A] 20 30 40 5t0 60 70 80<br>75.0 0.28 0.23 0.17 0.12 0.07 0.03 -<br>70.0 0.33 0.27 0.21 0.16 0.10 0.05 -<br>65.0 0.39 0.33 0.26 0.20 0.14 0.08 0.02<br>60.0 0.47 0.39 0.32 0.25 0.18 0.11 0.05<br>55.0 0.56 0.47 0.39 0.31 0.23 0.15 0.08<br>50.0 0.68 0.57 0.48 0.38 0.29 0.20 0.12<br>45.0 0.79 0.67 0.56 0.46 0.36 0.26 0.17<br>40.0 0.93 0.79 0.66 0.54 0.42 0.30 0.20<br>35.0 1.13 0.95 0.79 0.64 0.50 0.36 0.23<br>30.0 1.42 1.19 0.98 0.78 0.61 0.44 0.28<br>25.0 1.88 1.56 1.27 1.01 0.77 0.55 0.35<br>20.0 2.74 2.22 1.77 1.38 1.04 0.74 0.46<br>15.0 4.88 3.74 2.85 2.14 1.56 1.08 0.67<br>10.0 18.94 10.67 6.76 4.49 2.99 1.93 1.13<br>5.0 nh nh nh nh nh 7.25 3.21<br>**----- End of picture text -----**<br> - ‘nh’ means no heatsink necessary. The SSR should still be tightened to a surface to ensure optimal thermal dissipation. - : not possible or not recommended **8** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** ## **Compatibility and conformance** **Approvals[5]** ~~ssCEA AVG~~ LVD: EN 60947-4-2, EN 60947-4-3 EMCD: EN 60947-4-2, EN 60947-4-3 **Standard compliance** cURus: UL508, UL60947-4-2 (E172877), NMFT2, NMFT8 CSA: C22.2 No. 14, C22.2 No. 60947-4-2 (204075) **UL short circuit current rating** 65k Arms (refer to short circuit current section, Type 1 – UL508) ~~a~~ 5. UR, cUR and CSA not applicable for RZ3A69.. CSA approval for 75 A models (RZ3A..75.) is limited to 65 A @ 40°C. |**Electromagnetic compatibility (EMC) - immunity**|**Electromagnetic compatibility (EMC) - immunity**| |---|---| |**Electrostatic discharge (ESD)**|EN 61000-4-2<br>8 kV air discharge,4 kV contact(PC2)| |**Radiated radio frequency**|EN 61000-4-3<br>10 V/m, from 80 MHz to 1 GHz (PC1)<br>10 V/m, from 1.4 to 2 GHz (PC1)<br>3 V/m,from 2 to 2.7 GHz(PC1)| |**Electrical fast transient (burst)**|EN 61000-4-4<br>Output: 2 kV, 5 kHz (PC1)<br>Input: 1 kV,5 kHz(PC1)| |**Conducted radio frequency**|EN 61000-4-6<br>10V/m,from 0.15 to 80 MHz(PC1)| |**Electrical surge**|EN 61000-4-5<br>Output, line to line: 1 kV (PC1)<br>Output, line to earth: 2 kV (PC1)<br>Input,line to earth: 1 kV(PC1)| |**Voltage dips**|EN 61000-4-11<br>0% for 0.5, 1 cycle (PC2)<br>40% for 10 cycles (PC2)<br>70% for 25 cycles(PC2)| |**Voltage Interruptions**|EN 61000-4-11<br>0% for 5000ms(PC2)| ||| |**Electromagnetic compatibility (EMC) - emissions**<br>**Radio interference field emis-**<br>**sion(radiated)**<br>EN 55011<br>Class A: from 30 to 1000 MHz|| |**Radio interference voltage**<br>**emissions (conducted)**|From 0.15 to 30 MHz<br>EN 55011<br>Class A(industrial)with filters| ## Note: - Performance Criteria 1 (PC1): no degradation of performance or loss of function is allowed when the product is operated as intended. - Performance Criteria 2 (PC2): during the test, degradation of performance or partial loss of function is allowed. However when the test is complete the product should return operating as intended by itself. - Performance Criteria 3 (PC3): temporary loss of function is allowed, provided the function can be restored by manual operation of the controls. - Control input lines must be installed together to maintain products' susceptability to Radio Frequency interference. Use of AC solid state relays may, according to the application and the load current, cause conducted radio interferences. Use of mains filters may be necessary for cases where the user must meet E.M.C requirements. The capacitor values given inside the filtering specification tables should be taken only as indications, the filter attenuation will depend on the final application. **9** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** **==> picture [37 x 37] intentionally omitted <==** ## **Environmental specifications** |**Operating temperature**|-30° to +80°C(-22° to +176° F)| |---|---| |**Storage temperature**|-40° to +100°C(-40° to + 212° F)| |**Pollution degree**|3| |**EU RoHS compliant**|Yes| |**China RoHS**|25| The declaration in this section is prepared in compliance with People’s Republic of China Electronic Industry Standard SJ/ T11364-2014: Marking for the Restricted Use of Hazardous Substances in Electronic and Electrical Products. ||**Toxic or Harardous Substances and Elements**|**Toxic or Harardous Substances and Elements**|**Toxic or Harardous Substances and Elements**|**Toxic or Harardous Substances and Elements**|**Toxic or Harardous Substances and Elements**|**Toxic or Harardous Substances and Elements**| |---|---|---|---|---|---|---| |**Part Name**|Lead<br>(Pb)|Mercury<br>(Hg)|Cadmium<br>(Cd)|Hexavalent<br>Chromium<br>(Cr(Vl))|Polybrominat-<br>ed biphenyls<br>(PBB)|Polybromi-<br>nated diphenyl<br>ethers (PBDE)| |**Power Unit**<br>**Assembly**|x|O|O|O|O|O| |O: Indicates that said hazardous substance contained in homogeneous materials fot this part are below the limit<br>requirement of GB/T 26572.<br>X: Indicates that said hazardous substance contained in one of the homogeneous materials used for this part is above<br>the limit requirement of GB/T 26572.||||||| ## 这份申明根据中华人民共和国电子工业标准 SJ/T11364-2014：标注在电子电气产品中限定使用的有害物质 ||有毒或有害物质与元素|有毒或有害物质与元素|有毒或有害物质与元素|有毒或有害物质与元素|有毒或有害物质与元素|有毒或有害物质与元素| |---|---|---|---|---|---|---| |零件名称|铅<br>(Pb)|汞<br>(Hg)|镉<br>(Cd)|六价铬<br>(Cr(Vl))|多溴化联苯<br>(PBB)|多溴联苯醚<br>(PBDE)| |功率单元|x|O|O|O|O|O| |O:此零件所有材料中含有的该有害物低于GB/T 26572的限定。<br>X: 此零件某种材料中含有的该有害物高于GB/T 26572的限定。||||||| > Carlo Gavazzi LTD **10** 05/01/2026 RZ3A DS ENG **RZ3A** **==> picture [40 x 40] intentionally omitted <==** ## **Short circuit protection** ## **Protection Co-ordination, Type 1 vs Type 2:** Type 1 protection implies that after a short circuit, the device under test will no longer be in a functioning state. In type 2 co-ordination the device under test will still be functional after the short circuit. In both cases, however the short circuit has to be interrupted. The fuse between enclosure and supply shall not open. The door or cover of the enclosure shall not be blown open. There shall be no damage to conductors or terminals and the condcutors shall not separate from terminals. There shall be no breakage or cracking of insulating bases to the extent that the integrity of the mounting of live parts is impaired. Discharge of parts or any risk of fire shall not occur. The product variants listed in the table hereunder are suitable for use on a circuit capable of delivering not more than 65,000 Arms Symmetrical Amperes 600 Volts maximum when protected by fuses. Tests at 65,000 A were performed with Class J fuses, fast acting; please refer to the table below for maximum allowed ampere rating of the fuse. Use fuses only. Tests with Class J fuses are representative of Class CC fuses. |**Protection co-ordination Type 1 according to UL 508**|**Protection co-ordination Type 1 according to UL 508**|**Protection co-ordination Type 1 according to UL 508**|**Protection co-ordination Type 1 according to UL 508**|**Protection co-ordination Type 1 according to UL 508**| |---|---|---|---|---| |**Part No.**|**Prospective short**<br>**circuit current**<br>**[kArms]**|**Max fuse size [A]**|**Class**|**Voltage [VAC]**| |RZ3A..25|65|30|CC|600| |RZ3A..55||50<br>30|J<br>CC|| |RZ3A..75||70|J|| |**Protection co-ordination Type 2 with fuses**|**Protection co-ordination Type 2 with fuses**|**Protection co-ordination Type 2 with fuses**|**Protection co-ordination Type 2 with fuses**|**Protection co-ordination Type 2 with fuses**|**Protection co-ordination Type 2 with fuses**|**Protection co-ordination Type 2 with fuses**| |---|---|---|---|---|---|---| |**Part No.**|**Prospective**|**Ferraz Shawmut(Mersen)**||||| ||**short circuit**<br>**current [kArms]**|**Max fuse**<br>**size[A]**|**Part number**|**Fuse size**<br>**(mm)**|**Fuse holder type**|**Voltage**<br>**[VAC]**| |RZ3A..25|65|25<br>20|F1014581 - FR10GR69V20<br>E1014580 - FR10GR69V20|10.3 x 38<br>10.3 x 38|G1062790 - CUSCC3|400<br>600| |RZ3A..55||50<br>50|K1017207 - FR14GR69V50<br>C1018557 - FR22GR69V50|14 x 51<br>22 x 58|S331032 - CMS143<br>E331135 - CMS223|400<br>600| |RZ3A..75||63|D1018558 - FR22GR69V63|22 x 58|E331135 - CMS223|600| **11** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** **==> picture [37 x 37] intentionally omitted <==** **==> picture [483 x 49] intentionally omitted <==** **----- Start of picture text -----**<br> Protection co-ordination Type 2 with Minature Circuit Breakers (M.C.B.s)<br>Solid State Relay ABB Model no. for Z ABB Model no. for B Wire cross sectional Minimum length of<br>type - type M. C. B. (rated - type M. C. B. (rated area [mm [2] ] Cu wire conductor<br>current) current) [m] [6]<br>**----- End of picture text -----**<br> |**Protection co-ordination Type 2 with Minature Circuit Breakers(M.C.B.s)**|**Protection co-ordination Type 2 with Minature Circuit Breakers(M.C.B.s)**|**Protection co-ordination Type 2 with Minature Circuit Breakers(M.C.B.s)**|**Protection co-ordination Type 2 with Minature Circuit Breakers(M.C.B.s)**|**Protection co-ordination Type 2 with Minature Circuit Breakers(M.C.B.s)**| |---|---|---|---|---| |**Solid State Relay**<br>**type**|**ABB Model no. for Z**<br>**- type M. C. B. (rated**<br>**current)**|**ABB Model no. for B**<br>**- type M. C. B. (rated**<br>**current)**|**Wire cross sectional**<br>**area [mm2]**|**Minimum length of**<br>**Cu wire conductor**<br>**[m] 6**| |||||| |RZ3A..25|S203 - Z4 (4 A)<br>S203 - Z6 UC (6 A)|S203 - B2 (2 A)<br>S203 - B2 (2 A)|1.0<br>1.0<br>1.5|21.0<br>21.0<br>31.5| |RZ3A..55|S203 - Z10 (10 A)|S203 - B4 (4 A)|1.0<br>1.5<br>2.5|7.6<br>11.4<br>19.0| ||S203 - Z16 (16 A)|S203 - B6 (6 A)|1.0<br>1.5<br>2.5<br>4.0|5.2<br>7.8<br>13.0<br>20.8| ||S203 - Z20 (20 A)|S203 - B10 (10A)|1.5<br>2.5|12.6<br>21.0| ||S203 - Z25 (25 A)|S203 - B13 (13 A)|2.5<br>4.0|25.0<br>40.0| |RZ3A..75|S203 - Z20 (20 A)|S203 - B10 (10 A)|1.5<br>2.5<br>4.0|4.2<br>7.0<br>11.2| ||S203 - Z32 (32 A)|S203 - B16 (16 A)|2.5<br>4.0<br>6.0|13<br>20.8<br>31.2| 6. Between MCB and Load (including return path which goes back to the mains) Note: A prospective current of 6 kA and a 230 / 400 V power supply is assumed for the above suggested specifications. For cables with different cross section than those mentioned above please consult Carlo Gavazzi's Technical Support Group. **12** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** **==> picture [40 x 40] intentionally omitted <==** ## t **Connection Diagrams** **==> picture [438 x 273] intentionally omitted <==** **----- Start of picture text -----**<br> A1 (~) (+) Regulation T1<br>B1 A1<br>ZC Output A B2 A2<br>L1<br>T2<br>Control<br>B1 A1<br>Input ZC Output B<br>AC/DC<br>B2 A2<br>L2<br>T3<br>ZC Output C<br>A2 (~) (-) L3<br>B1 A1<br>B1 (+) B2 A2<br>Alarm Over Temp<br>Output Circuit<br>B2 (-)<br>Logic<br>Input<br>Note: B1 and B2 applicable only to RZ3A..P<br>**----- End of picture text -----**<br> **Fig. 1** _Terminal wiring_ **Fig. 2** _Common alarm wiring_ ## **Alarm output connection** **==> picture [169 x 114] intentionally omitted <==** **----- Start of picture text -----**<br> Active Low<br>VDC<br>B1<br>B2<br>RZ3A..<br>Logic Input<br>Alarm Output<br>**----- End of picture text -----**<br> **==> picture [53 x 109] intentionally omitted <==** **----- Start of picture text -----**<br> Active High<br>VDC<br>Logic Input<br>**----- End of picture text -----**<br> **13** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD **RZ3A** ## **Connection specifications** **==> picture [262 x 291] intentionally omitted <==** **----- Start of picture text -----**<br> ||| |---|---| |Mounting specifications (SSR to heatsink)| |Mounting screws|M5, not provided with SSR| |Mounting torque|1.5 Nm (13.3 lb-in)| |Power connections| |Cn| |Terminals|1/L1, 2/T1, 3/L2, 4/T2, 5/L3, 6/T3| |a| |Conductors|Use 75°C copper (Cu) conductors| |a| |Connection type|M5 screw with captivated washer| |ae| |Stripping length|12 mm| |a| |2x 1.0 - 6.0 mm²| |Rigid (solid & stranded)| |2x 18 - 8 AWG| |Flexible|2x 1.5 - 6.0 mm²| |(without end sleeve)|2x 18 - 8 AWG| |Torque specifications|Pozidriv bit 22.5 Nm| **----- End of picture text -----**<br> Note: when wiring 2 cables in a single terminal, both cables must be of the same thickness to ensure cable secureness. **==> picture [278 x 234] intentionally omitted <==** **----- Start of picture text -----**<br> ||| |---|---| |Control connections| |Cn| |Terminals|A1+, A2- / A1, A2| |ee| |Conductors|Use 60/75°C copper (Cu) conductors| |ee| |LEeSEEo|e| |Connection type|M4 screw with captivated washer| |ae| |Stripping length|8 mm| |ae| |2x 1 - 2.5 mm²| |Rigid (solid & stranded)| |2x 18 - 14 AWG| |Flexible|2x 1 - 2.5 mm²| |(without end sleeve)|2x 18 - 14 AWG| |Torque specification|Pozidriv bit 21.2 Nm| **----- End of picture text -----**<br> COPYRIGHT ©2026 Content subject to change. Download the PDF: https://gavazziautomation.com **14** 05/01/2026 RZ3A DS ENG Carlo Gavazzi LTD
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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