GSB634PB3

CIRCUIT BREAKERS MCB UL1077 B 4P 3A

⚠️ 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: Thermal Magnetic Circuit Breakers
SVHC: No SVHC (21-Jan-2025)
Delivery and price
Units per pack	15
Price	36.73 €
Current stock	10+
Lead time	30 days
Datasheet
**Supplementary Circuit Protectors Type GSB63** 

- l **Protection of circuits against short circuit and overload currents** 

- l **UL1077 supplementary protection** 

- l **1, 2, 3 and 4 pole arrangements** 

- l **13 amperage sizes up to 63Amps** 

- l **Icn of 5kA** 

- l **Bimetallic element for small overloads** 

- l **Magnetic element for short circuit protection** 

- l **B, C, D trip characteristics** 

- l **Full line of bus bars and connectors** 

- l **Auxiliary contact, alarm switch and shunt release accessories** 

## **Product Description** 

## **Ordering Key** 

## **GSB63 1P C 20** 

Competitive line of supra-protection in applications ple- or not required. GSB tions, with amperage rating pro-mentary circuit protecwhere branch circuit protors tectors are available in up to 63A and voltage up to 1, intended for over current tection is already provided 2, 3 and 4 pole configu480Y/277VAC. 

**Supplementary Protector Number of poles Tripping Characteristics Overload range** 

## **Selection Guide** _(Refer to page 2 for list of valid part numbers)_ 

**SCP Numbers of poles Tripping Characteristics Overload Range (amps) GSB63 Family 1P C – C curve 1, 2, 3, 4, 6, 10, 2P (standard) 16, 20, 25, 32, 40, 3P B – B curve 50, 63 4P D – D curve** 

1 

## **ElectricalGSB63** 

**==> picture [69 x 70] intentionally omitted <==**

## **Selection Guide** 

## C Curve 

|In||1-pole||2-pole||3-pole||4-pole|
|---|---|---|---|---|---|---|---|---|
|~~1~~||~~**GSB63 1P C1**~~||~~**GSB63 2P C1**~~||~~**GSB63 3P C1**~~||~~**GSB63 4P C1**~~|
|2||**GSB63 1P C2**||**GSB63 2P C2**||**GSB63 3P C2**||**GSB63 4P C2**|
|~~3~~||~~**GSB63 1P C3**~~||~~**GSB63 2P C3**~~||~~**GSB63 3P C3**~~||~~**GSB63 4P C3**~~|
|4||**GSB63 1P C4**||**GSB63 2P C4**||**GSB63 3P C4**||**GSB63 4P C4**|
|~~6~~||~~**GSB63 1P C6**~~||~~**GSB63 2P C6**~~||~~**GSB63 3P C6**~~||~~**GSB63 4P C6**~~|
|10||**GSB63 1P C10**||**GSB63 2P C10**||**GSB63 3P C10**||**GSB63 4P C10**|
|~~16~~||~~**GSB63 1P C16**~~||~~**GSB63 2P C16**~~||~~**GSB63 3P C16**~~||~~**GSB63 4P C16**~~|
|20||**GSB63 1P C20**||**GSB63 2P C20**||**GSB63 3P C20**||**GSB63 4P C20**|
|~~25~~||~~**GSB63 1P C25**~~||~~**GSB63 2P C25**~~||~~**GSB63 3P C25**~~||~~**GSB63 4P C25**~~|
|32||**GSB63 1P C32**||**GSB63 2P C32**||**GSB63 3P C32**||**GSB63 4P C32**|
|~~40~~||~~**GSB63 1P C40**~~||~~**GSB63 2P C40**~~||~~**GSB63 3P C40**~~||~~**GSB63 4P C40**~~|
|50||**GSB63 1P C50**||**GSB63 2P C50**||**GSB63 3P C50**||**GSB63 4P C50**|
|~~63~~||~~**GSB63 1P C63**~~||~~**GSB63 2P C63**~~||~~**GSB63 3P C63**~~||~~**GSB63 4P C63**~~|



## B Curve 

|In||1-pole||2-pole||3-pole||4-pole|
|---|---|---|---|---|---|---|---|---|
|~~1~~||~~**GSB631PB1**~~||~~**GSB632PB1**~~||~~**GSB633PB1**~~||~~**GSB634PB1**~~|
|2||**GSB631PB2**||**GSB632PB2**||**GSB633PB2**||**GSB634PB2**|
|~~3~~||~~**GSB631PB3**~~||~~**GSB632PB3**~~||~~**GSB633PB3**~~||~~**GSB634PB3**~~|
|4||**GSB631PB4**||**GSB632PB4**||**GSB633PB4**||**GSB634PB4**|
|~~6~~||~~**GSB631PB6**~~||~~**GSB632PB6**~~||~~**GSB633PB6**~~||~~**GSB634PB6**~~|
|10||**GSB631PB10**||**GSB632PB10**||**GSB633PB10**||**GSB634PB10**|
|~~16~~||~~**GSB631PB16**~~||~~**GSB632PB16**~~||~~**GSB633PB16**~~||~~**GSB634PB16**~~|
|20||**GSB631PB20**||**GSB632PB20**||**GSB633PB20**||**GSB634PB20**|
|~~25~~||~~**GSB631PB25**~~||~~**GSB632PB25**~~||~~**GSB633PB25**~~||~~**GSB634PB25**~~|
|32||**GSB631PB32**||**GSB632PB32**||**GSB633PB32**||**GSB634PB32**|
|~~40~~||~~**GSB631PB40**~~||~~**GSB632PB40**~~||~~**GSB633PB40**~~||~~**GSB634PB40**~~|
|50||**GSB631PB50**||**GSB632PB50**||**GSB633PB50**||**GSB634PB50**|
|~~63~~||~~**GSB631PB63**~~||~~**GSB632PB63**~~||~~**GSB633PB63**~~||~~**GSB634PB63**~~|



|D Curve|D Curve||||||||
|---|---|---|---|---|---|---|---|---|
|In||1-pole||2-pole||3-pole||4-pole|
|~~**1**~~||~~**GSB631PD1**~~||~~**GSB632PD1**~~||~~**GSB633PD1**~~||~~**GSB634PD1**~~|
|**2**||**GSB631PD2**||**GSB632PD2**||**GSB633PD2**||**GSB634PD2**|
|~~**3**~~||~~**GSB631PD3**~~||~~**GSB632PD3**~~||~~**GSB633PD3**~~||~~**GSB634PD3**~~|
|**4**||**GSB631PD4**||**GSB632PD4**||**GSB633PD4**||**GSB634PD4**|
|~~**6**~~||~~**GSB631PD6**~~||~~**GSB632PD6**~~||~~**GSB633PD6**~~||~~**GSB634PD6**~~|
|**10**||**GSB631PD10**||**GSB632PD10**||**GSB633PD10**||**GSB634PD10**|
|~~**16**~~||~~**GSB631PD16**~~||~~**GSB632PD16**~~||~~**GSB633PD16**~~||~~**GSB634PD16**~~|
|**20**||**GSB631PD20**||**GSB632PD20**||**GSB633PD20**||**GSB634PD20**|
|~~**25**~~||~~**GSB631PD25**~~||~~**GSB632PD25**~~||~~**GSB633PD25**~~||~~**GSB634PD25**~~|
|**32**||**GSB631PD32**||**GSB632PD32**||**GSB633PD32**||**GSB634PD32**|
|~~**40**~~||~~**GSB631PD40**~~||~~**GSB632PD40**~~||~~**GSB633PD40**~~||~~**GSB634PD40**~~|
|**50**||**GSB631PD50**||**GSB632PD50**||**GSB633PD50**||**GSB634PD50**|
|~~**63**~~||~~**GSB631PD63**~~||~~**GSB632PD63**~~||~~**GSB633PD63**~~||~~**GSB634PD63**~~|



Part numbers in bold font indicate stock item 

Specifications are subject to change without notice  — September- 2020 

2 

## **ElectricalGSB63** 

## **Electrical Specifications** 

|**Rated Current**|**1, 2, 3, 4, 6, 10, 16, 20, 25,**<br>**32, 40, 50, 63 A**|
|---|---|
|**Poles**|**1, 2, 3 or 4 pole**|
|**Rated Voltage**|**single phase   277 VAC**|
||**three phase     480Y/277VAC**|
|**Insulation Voltgae**|**500 VAC**|
|**Rated Frequency**|**50/60 Hz**|
|**Rated Breaking capacity**|**5,000 A**|
|**Rated Impulse Withstand**<br>**Voltage (1.2/50)**|**4,000 V**|
|**Dielectric Test Voltage for**<br>**1 minute**|**2,000 V**|
|**Pollution Degree**|**2**|
|**Power loss per pole**<br> 1, 2, 3, 4, 5, 6, 10 A<br>13, 16, 20, 25, 32 A<br>40, 50, 63 A|**2 W**|
||**3.5 W**|
||**5 W**|
|**Thermo—magnetic release**<br>**characteristics**|**B, C (standard), D**|
|**Electrical life**|**4,000 cycles**|



**==> picture [69 x 70] intentionally omitted <==**

## **Mechanical Specifications** 

||**Mechanical life**|**20,000 cycles**|
|---|---|---|
||**Contact Position Indicator**|**Yes**|
||**Protection Degree**<br>**Reference Temperature**<br>**Operation Temperature**|**IP20**<br>**30°C**<br>**-35°C ~ +70°C (see table on**|
||**Range**|**page 3 for derating)**|
||**Terminal Connection Type**|**Copper/U-type busbar/Pin-**|
|||**type busbar**|
||**Wire Size Range**|**18-4 AWG**|
||**Busbar size range**|**18-8 AWG**|
||**Maximum tightening torque**|**22 In-lbs. (N*m 2)**|
||**Mounting**|**Vertical on DIN rail EN 60715**|
|||**(35mm)**|
||**Connection**|**Line-in on top, line-out on**|
|||**bottom**|



3 

## **GSB63 Technical Specifications** 

## **Temperature Derating** 

The maximum permissible current in a supplementary protector depends on the ambient temperature and spacing between devices (see next paragraph). Ambient temperature is the temperature inside the enclosure or switch-board in which circuit breaker is installed. The reference temperature for nominal current rating is 30°C. 

|**Ambient Temp > -35°C**|**Ambient Temp > -35°C**|**-30°C**|**-20°C**|**-10°C**|**0°C**|**10°C**|**20°C**|**30°C**|**40°C**|**50°C**|**60°C**|**70°C**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**Rated Current**|||||||||||||
|~~1A~~|~~1.30~~|~~1.26~~|~~1.23~~|~~1.19~~|~~1.15~~|~~1.11~~|~~1.05~~|~~1.00~~|~~0.96~~|~~0.93~~|~~0.88~~|~~0.83~~|
|2A|2.60|2.52|2.46|2.38|2.28|2.20|2.08|2.00|1.92|1.86|1.76|1.66|
|~~3A~~|~~3.90~~|~~3.78~~|~~3.69~~|~~3.57~~|~~3.42~~|~~3.30~~|~~3.12~~|~~3.00~~|~~2.88~~|~~2.79~~|~~2.64~~|~~2.49~~|
|4A|5.20|5.04|4.92|4.76|4.56|4.40|4.16|4.00|3.84|3.76|3.52|3.32|
|~~6A~~|~~7.80~~|~~7.56~~|~~7.38~~|~~7.14~~|~~6.84~~|~~6.60~~|~~6.24~~|~~6.00~~|~~5.76~~|~~5.64~~|~~5.28~~|~~4.98~~|
|10A|13.20|12.76|12.50|12.00|11.50|11.10|10.60|10.00|9.60|9.30|8.90|8.40|
|~~16A~~|~~21.12~~|~~20.48~~|~~20.00~~|~~19.20~~|~~18.40~~|~~17.76~~|~~16.96~~|~~16.00~~|~~15.36~~|~~14.88~~|~~14.24~~|~~13.44~~|
|20A|26.40|25.60|25.00|24.00|23.00|22.20|21.20|20.00|19.20|18.60|17.80|16.80|
|~~25A~~|~~33.00~~|~~32.00~~|~~31.25~~|~~30.00~~|~~28.75~~|~~27.75~~|~~26.50~~|~~25.00~~|~~24.00~~|~~23.25~~|~~22.25~~|~~21.00~~|
|32A|42.56|1.28|40.00|38.72|37.12|35.52|33.92|32.00|30.72|29.76|28.16|26.88|
|~~40A~~|~~53.20~~|~~51.20~~|~~50.00~~|~~48.00~~|~~46.40~~|~~44.80~~|~~42.40~~|~~40.00~~|~~38.40~~|~~37.20~~|~~35.60~~|~~33.60~~|
|50A|67.00|65.50|63.00|60.50|58.00|56.00|53.00|50.00|48.00|46.50|44.00|41.50|
|~~63A~~|~~83.79~~|~~81.90~~|~~80.01~~|~~76.86~~|~~73.71~~|~~70.56~~|~~66.78~~|~~63.00~~|~~60.48~~|~~58.90~~|~~55.44~~|~~52.29~~|



## **Curve Profiles** 

4 

## **GSB63 Technical Specifications** 

## **Accessories** 

**==> picture [69 x 70] intentionally omitted <==**

|**Accessories**|||
|---|---|---|
|**Auxiliary Contact**|||
|**General**|**Ordering key:**|**GSBXF9**|



Indication of the position of the device’s contacts. To be mounted on the left side of the UL1077 supplementary protector, thanks to the special pin. 

## **Technical data** 

|Voltage<br>~~AC415 50/60HZ~~<br>Rated values<br>AC240 50/60HZ<br>~~DC130~~<br>DC48<br>~~DC24~~<br>|Current<br>~~3A~~<br>6A<br>~~1A~~<br>2A<br>~~6A~~<br>1 N/O + 1 N/C<br>~~V~~<br>~~4000~~<br>kV<br>2<br>~~V~~<br>~~500~~<br>2<br>~~6,050~~<br>10,000<br>~~IP20~~<br> <br>°C<br>-5...+40<br>~~°C~~<br>~~-25...+70~~<br>Cable<br>mm²<br>2.5<br>AWG<br>18 ~ 14<br>N·m<br>0.8<br>In-Ibs.<br>7<br>~~nly~~|
|---|---|
|Electrical features<br>Confgurations<br>~~Rated impulse withstand voltage (1.2/50)Uimp~~<br>DielectricTestvoltage at ind. Freq. for 1min<br>~~Insulation voltage Ui~~<br>Pollution degree||
|~~Electrical life~~<br>Mechanical life<br>Mechanical features<br>~~Protection degree~~<br>Ambient temperature (with daily average≤35°C)<br>~~Storage temperature~~||
|Installation<br>Terminal connection type T<br>Tightening torque<br>~~Terminal size top/bottom for cable~~||
|Approvals<br>~~CE o~~||



5 

## **GSB63** 

## **Alarm Switch** 

## **General** 

## **Ordering key:** 

**==> picture [69 x 70] intentionally omitted <==**

## **GSBXF9J** 

Indication of the position of the device’s contacts only after the automatic release of the UL1077 supplementary protector, due to an overload or a short-circuit. To be mounted on the left side of the UL1077 device thanks to the special pin. **Technical data** 

||Voltage||Current||
|---|---|---|---|---|
||~~AC415 50/60HZ~~||~~3A~~||
|Rated value|AC240 50/60HZ<br>~~DC130~~||6A<br>~~1A~~||
||DC48||2A||
||~~DC24~~||~~6A~~||
||Confgurations||1 N/O + 1 N/C||
||~~Rated impulse withstand voltage (1.2/50)Uimp~~|~~V~~|~~4000~~||
|Electrical features|Dielectrictestvoltage at ind. Freq. for 1min|kV|2||
||~~Insulation voltage Ui~~|~~V~~|~~500~~||
||Pollution degree||2||
||~~Electrical life~~||~~6,050~~||
||Mechanical life||10,000||
|Mechanical features|~~Protection degree~~||~~IP20~~||
||Ambient temperature (with daily average≤35°C)|°C|-5...+40||
||~~Storage temperature~~|~~°C~~|~~-25...+70~~||
||Terminal connection type||Cable||
|Installation|~~Terminal size top/bottom for cable~~|mm²<br>AWG|2.5<br>18 ~ 14||
||Tightening torque|N·m<br>In-Ibs.|0.8<br>7||
|Approvals|~~CE only~~||||



6 

## **GSB63** 

## **Shunt realease** 

**==> picture [69 x 70] intentionally omitted <==**

## **General Ordering key: GSBS9** 

Remote opening of the device when a voltage is applied. To be mounted on the left side of the UL1077 supplementary protector, thanks to the special pin. **Technical data** 

|Standard||~~IEC/EN 60947-5-1~~|~~IEC/EN 60947-5-1~~|||
|---|---|---|---|---|---|
|Rated value||Voltage||24VDC||
|||~~Confgurations~~||~~1 N/O + 1 N/C~~||
|Electrical features||Rated impulse withstand voltage (1.2/50)Uimp<br>~~Dielectric TEST voltage at ind. Freq. for 1min~~|V<br>~~kV~~|4000<br>~~2~~||
|||Insulation voltage Ui|V|500||
|||~~Pollution degree~~||~~2~~||
|||Electrical life||4,000||
|||~~Mechanical life~~||~~4,000~~||
|Mechanical features||Protection degree||IP20||
|||~~Ambient temperature (with daily average≤35°C)~~|~~°C~~|~~-5...+70~~||
|||Storage temperature|°C|-25...+70||
|||Terminal connection type||Cable||
|Installation||~~Terminal size top/bottom for cable~~|mm²<br>AWG|2.5<br>18 ~ 14||
|||Tightening torque|N·m<br>In-Ibs.|0.8<br>7||
|Approvals||~~CE only~~||||



7 

## **GSB63 — Busbars and Connectors** 

|Acces-<br>sory|Poles|Pins|Part Number|Description|Combined<br>Amperage<br>Rating|Rated<br>voltage|Dimmentions [mm  / in]|Dimmentions [mm  / in]|Dimmentions [mm  / in]|Dimmentions [mm  / in]|
|---|---|---|---|---|---|---|---|---|---|---|
||||||||A|B|C|D|
|Busbar|1|6|GSBB1P06H|6 pins busbar 1<br>pole GSB|100A|600 VAC / 1000 VDC|89 / 3.5|17.8 / 0.70|5.5 / 0.22|16.7 / 0.66|
|||12|GSBB1P12H|12 pins busbar 1<br>pole GSB|100A||196 / 7.72|17.8 / 0.70|5.5 / 0.22|16.7 / 0.66|
|||18|GSBB1P18H|18 pins busbar 1<br>pole GSB|100A||303 / 11.92|17.8 / 0.70|5.5 / 0.22|16.7 / 0.66|
|||57|**GSBB1P57H**|cuttable 57 pins<br>busbar 1 pole GSB|100A||997 / 39.25|17.8 / 0.70|5.5 / 0.22|15.6 / 0.61|
|||37|GSBB1P37HS|cuttable 37 pins<br>busbar 1 pole<br>GSB+AUX|100A||972 / 38.27|17.8 / 0.70|5.5 / 0.22|15.6 / 0.61|
||2|6|GSBB2P06H|6 pins busbar 2<br>pole GSB|100A|600 VAC / 600 VDC|89 / 3.5|17.8 / 0.70|5.5 / 0.22|36.5 / 1.44|
|||12|GSBB2P12H|12 pins busbar 2<br>pole GSB|100A||196 / 7.72|17.8 / 0.70|5.5 / 0.22|36.5 / 1.44|
|||18|GSBB2P18H|18 pins busbar 2<br>pole GSB|100A||303 / 11.93|17.8 / 0.70|5.5 / 0.22|36.5 / 1.44|
|||56|**GSBB2P56H**|cuttable 57 pins<br>busbar 2 pole GSB|100A||979 / 38.54|17.8 / 0.70|5.5 / 0.22|36.5 / 1.44|
|||46|GSBB2P46HS|cuttable 37 pins<br>busbar 2 pole<br>GSB+AUX|100A||968 / 38.11|17.8 / 0.70|5.5 / 0.22|36.5 / 1.44|
||3|6|GSBB3P06H|6 pins busbar 3<br>pole GSB|100A||89 / 3.5|17.8 / 0.70|5.5 / 0.22|36.5 / 1.44|
|||12|GSBB3P12H|12 pins busbar 3<br>pole GSB|100A||196 / 7.72|17.8 / 0.70|5.5 / 0.22|36.5 / 1.44|
|||18|GSBB3P18H|18 pins busbar 3<br>pole GSB|100A||303 / 11.93|17.8 / 0.70|5.5 / 0.22|36.5 / 1.44|
|||57|**GSBB3P57H**|cuttable 57 pins<br>busbar 3 pole GSB|100A||997 / 39.25|17.8 / 0.70|5.5 / 0.22|36.5 / 1.44|
|||48|GSBB3P48HS|cuttable 37 pins<br>busbar 3 pole<br>GSB+AUX|100A||935 / 36.81|17.8 / 0.70|5.5 / 0.22|36.5 / 1.44|
|Feeder|1||**GSBBFEED1P**|Feeder terminal 1<br>pole GSB|115A|600 VAC / 600<br>VDC|Part number in**bold font**indicate stock items<br>Approvals - CE, cULus (UL508)||||
||2, 3||**GSBBFEED23P**|Feeder terminal 2<br>& 3 pole GSB|115A||||||
|Center<br>feeder|all||**GSBBCENFEED**|Center feeder<br>terminal|115A||||||
|End cap|1||**GSBBENDCAP1P**|End cover 1 pole<br>GSB|n / a|n / a|||||
||2, 3||**GSBBENDCAP23P**|End cover 2 & 3<br>pole GSB|||||||
|Pin cap|all||**GSBBPINCAP**|Protective pin cap|||||||



8 

## **GSB63 Technical Specifications** 

## **Dimensions** 

**==> picture [463 x 110] intentionally omitted <==**

**----- Start of picture text -----**<br>
i % re a = fae | = Sem = =<br>way ~'s @ ele eiuiele ee|<br>18 0 36 0 54 0 72 0<br> 49.5 ± 0.31 -0.43 -0.62 -1.2 -1.2<br>78 0<br>-1.2 1P 1P+N, 2P 3P 3P+N, 4P<br>0 -1.4<br>86<br> 45 ± 0.31  34.5 ± 0.5<br>**----- End of picture text -----**<br>


## **Agency Approvals** 

## **GSB Supplementary Protectors** 

**E365997** 

GSB Supplementary Protectors 

GSBB Busbars and Busbar Accessories e(U,)us **E483985** 

9
Updated at June 9, 2026
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