Siemens HB3B090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Siemens
HB3B090
Molded Case Circuit Breaker
Brand
Siemens
SKU
HB3B090
Quantity
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Siemens HB3B090 - 90A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial and industrial applications, the HB3B090 provides reliable thermal-magnetic protection for 90A circuits. This three-pole bolt-on breaker installs into Siemens and legacy ITE Series 1-5 panelboards, ensuring seamless integration with existing infrastructure. Featuring a robust 65kAIC rating at 240VAC, it handles high fault currents while maintaining HACR compliance for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Series | HBQ |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC |
| Frame Type | BQ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens/ITE Legacy Panelboards (Series 1-5) |
| Wire Gauge | 8-1 AWG (Cu), 6-1/0 AWG (Al) |
| Max Wire | 1 AWG (Cu), 1/0 AWG (Al) |
| Min Wire | 8 AWG (Cu), 6 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 |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards accept the HB3B090 circuit breaker?
This bolt-on breaker is designed for direct installation into Siemens and legacy ITE Series 1 through 5 panelboards, securing directly to the bus for a reliable connection.
How does the HB3B090 differ from the B390 and B390H?
While all three are 90A, 3-pole breakers, they offer different interrupting capacities. The standard B390 is rated for 10kAIC, the B390H for 22kAIC, and the HB3B090 provides the highest fault protection at 65kAIC.
Is the HB3B090 suitable for reverse feed applications?
Yes. Because it is built with a non-interchangeable thermal-magnetic trip unit, it is approved for reverse feed installations under UL 489 guidelines.
Does this breaker carry an HACR rating?
Yes, the HB3B090 is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment requiring group motor protection.
What type of wire can be used with the HB3B090 terminals?
The standard factory lugs are rated for both copper and aluminum conductors. They accept 8 to 1 AWG copper wire or 6 to 1/0 AWG aluminum wire.
Are the trip settings on the HB3B090 adjustable?
No, this breaker features fixed thermal and fixed magnetic trip settings for both long-time and instantaneous overcurrent protection.
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