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Siemens B245H Molded Case Circuit Breaker
- 45A
- 2 Pole
- Bolt-On
Siemens
B245H
Molded Case Circuit Breaker
Brand
Siemens
SKU
B245H
Quantity
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Siemens B245H - 45A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens B245H - 45A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B245H |
| Series | BLH |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 240VAC, 22kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment, Handle Tie |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Sold out
Quantity
Siemens B245H - 45A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B245H-R |
| Series | BLH |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 240VAC, 22kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment, Handle Tie |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
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Description
Built for commercial power distribution, the Siemens B245H is a 2-pole, 45-amp molded case circuit breaker from the BLH series. It features a thermal-magnetic trip unit for reliable long-time and instantaneous (LI) protection. This bolt-on MCCB mounts securely into Siemens P1 through P5 panelboards. It accepts 8-6 AWG copper or 8-4 AWG aluminum wiring via standard lug terminals. Rated for 120/240VAC systems, it provides a 22kAIC interrupting capacity and is HACR rated for HVAC applications.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B245H |
| Series | BLH |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 240VAC, 22kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment, Handle Tie |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhich Siemens panelboards accept the B245H circuit breaker?
The B245H is a bolt-on breaker designed specifically for Siemens P1, P2, P3, P4, and P5 commercial panelboards. It will not fit in standard plug-on residential load centers.
What is the difference between the Siemens B245 and the B245H?
The B245H is the high-interrupting version of the standard B245. While the standard BL series B245 provides a 10kAIC rating, the BLH series B245H offers a 22kAIC interrupting rating at 120/240VAC for systems with higher available fault current.
Is the B245H suitable for HVAC equipment?
Yes, the B245H is HACR rated, meaning it is certified for use with heating, air conditioning, and refrigeration equipment that requires this specific overcurrent protection designation.
How are the line and load connections configured on the B245H?
The B245H uses a bolt-on connection for the line side, which mounts directly to the panelboard bus. The load side features standard mechanical lugs that accept 8 to 6 AWG copper or 8 to 4 AWG aluminum wire.
How does the thermal-magnetic trip unit in the B245H operate?
The fixed thermal-magnetic trip unit provides dual protection. The thermal element responds to sustained overloads with a long-time delay, while the magnetic element trips instantaneously to clear severe short circuits.
Can the B245H be used on a 277V or 480V system?
No, the B245H is rated for a maximum of 120/240VAC. It is not designed or rated for use on 277V or 480V electrical systems.
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