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Siemens B390H Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Siemens
B390H
Molded Case Circuit Breaker
Brand
Siemens
SKU
B390H
Quantity
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Siemens B390H - 90A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Siemens B390H - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B390H |
| Series | BLH |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| 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, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
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Siemens B390H - 90A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B390H-R |
| Series | BLH |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| 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, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
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Description
Built for commercial power distribution, the Siemens B390H is a 3-pole, 90-amp molded case circuit breaker. It utilizes a fixed thermal-magnetic trip mechanism to deliver precise long-time and instantaneous (LI) overcurrent protection. Designed for seamless integration, this BLH-type breaker installs into Siemens P1, P2, P3, P4, and P5 panelboards. It features a 22kAIC interrupt rating at 240VAC, standard lug terminals, and carries a HACR rating for heating and cooling applications.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B390H-R |
| Series | BLH |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| 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, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
6 answersWhich panelboards are compatible with the B390H circuit breaker?
This breaker is engineered for bolt-on installation in Siemens P1, P2, P3, P4, and P5 commercial panelboards. It occupies three pole spaces and mounts directly to the panel bus.
Can the B390H replace a standard B390 circuit breaker?
Yes. The B390H shares the same physical footprint and bolt-on mounting as the standard B390, but it provides a higher interrupting rating. It can safely replace a B390 in applications where a 22kAIC or lower fault current rating is required.
What does the H suffix indicate on the B390H catalog number?
The H designates this as a high-interrupting circuit breaker within the Siemens BL family. While standard BL breakers are rated for 10kAIC, the BLH series provides a 22kAIC interrupting capacity at 240VAC.
Is it safe to install the B390H in a panelboard from another manufacturer?
No. The B390H is UL listed exclusively for use in compatible Siemens panelboards. Installing it in a panel from a different manufacturer violates the UL listing and creates a severe safety hazard due to improper busbar connections.
Does the B390H provide ground fault or arc fault protection?
No. This is a standard thermal-magnetic circuit breaker providing long-time and instantaneous overcurrent and short-circuit protection. It does not include GFCI or AFCI circuitry.
Is the B390H rated for heating, air conditioning, and refrigeration equipment?
Yes. The B390H carries a HACR rating, making it suitable for branch circuit protection of heating, air conditioning, and refrigeration equipment that requires this specific UL certification.
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