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Siemens HGB3B045B Molded Case Circuit Breaker
- 45A
- 3 Pole
- Bolt-On
Siemens
HGB3B045B
Molded Case Circuit Breaker
Brand
Siemens
SKU
HGB3B045B
Quantity
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Siemens HGB3B045B - 45A 3 Pole Molded Case Circuit Breaker
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Description
Providing reliable circuit protection, the Siemens HGB3B045B is a 3-pole, 45A molded case circuit breaker. It incorporates a trip-free mechanism and common trip functionality for commercial systems. This bolt-on device integrates into Siemens P1 through P5 panelboards. It is replaced by the 3VA5145-6ED31-0AA0 breaker when utilizing the required mounting kit. Rated for 100 kAIC at 240VAC and 35 kAIC at 480Y/277VAC, it delivers high interrupting capacity. The breaker is HACR and HID rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HGB3B045B |
| Series | HGB |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 35kA @ 480Y/277VAC, 14kA @ 600Y/347VAC, 42kA @ 125/250VDC |
| Frame Type | HGB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 8-1/0 AWG (Cu), 8-2/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, High Interrupting Capacity, HID Rated, Common Trip, Trip-Free Mechanism, Non-Interchangeable Trip |
Product FAQs
6 answersWhich Siemens panelboards are compatible with the HGB3B045B circuit breaker?
The HGB3B045B is a bolt-on molded case circuit breaker designed for use in Siemens P1, P2, P3, P4, and P5 panelboards.
What is the difference between Siemens NGB, HGB, and LGB circuit breakers?
These prefixes indicate the interrupting capacity of the Sentron GB frame. NGB is the standard rating (25kA at 480V), HGB is the high interrupting rating (35kA at 480V), and LGB is the extra-high interrupting rating (65kA at 480V). The HGB3B045B specifically provides 35kAIC at 480Y/277V AC.
What wire sizes are accepted by the standard lugs on the HGB3B045B?
The standard factory lugs (catalog number 3TC1GG20) accept #8 to 1/0 AWG copper (Cu) conductors and #8 to 2/0 AWG aluminum (Al) conductors.
Is the Siemens HGB3B045B rated for DC voltage applications?
Yes, this thermal-magnetic breaker is rated for DC applications up to 125/250V DC, providing an interrupting capacity of 42kAIC at that voltage.
Can the HGB3B045B be mounted on a standard DIN rail?
No, the HGB3B045B is specifically configured with a bolt-on line end for panelboard mounting. For DIN rail or base mounting without adapters, the Siemens GG or xGB2 frame breakers are required.
Does the HGB3B045B provide GFCI or AFCI protection?
No, this is a standard thermal-magnetic circuit breaker with fixed long-time and instantaneous (LI) trip functions. It does not provide ground fault or arc fault protection.
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