Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Siemens B345H Molded Case Circuit Breaker
- 45A
- 3 Pole
- Bolt-On
Siemens
B345H
Molded Case Circuit Breaker
Brand
Siemens
SKU
B345H
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens B345H - 45A 3 Pole Molded Case Circuit Breaker
New
Quantity
Similar Items
40A 3 Pole Molded Case Circuit Breaker
40A 3 Pole Molded Case Circuit Breaker
70A 3 Pole Molded Case Circuit Breaker
Description
Designed for systems requiring higher interrupting capacity, this 45A BLH-type molded case circuit breaker delivers 22kAIC protection at 240VAC. It mounts securely into Siemens P1, P2, P3, P4, and P5 panelboards, utilizing a bolt-on connection for maximum stability in commercial environments. The thermal-magnetic trip unit provides precise long-time and instantaneous overcurrent protection. It is HACR rated and serves as an excellent substitute for QOB345VH and THHQB32045 breakers.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B345H |
| Series | BLH |
| Amperage | 45A |
| 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 | 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
4 answersWhat is the difference between Siemens BL and BLH series breakers?
The difference lies in their short circuit interrupting capacity. The standard BL series is rated for 10kAIC, while the BLH series provides a higher 22kAIC rating at 240VAC for commercial systems with higher available fault currents.
Is the Siemens B345H a direct replacement for the ITE B345H?
Yes. Siemens acquired ITE, and the current Siemens B345H serves as the exact replacement for the legacy ITE model. It maintains the same bolt-on mounting style and physical footprint.
Can the Siemens B345H be reverse fed?
Yes. According to Siemens specifications, this breaker is suitable for reverse feed applications under UL 489 because the thermal magnetic trip unit is fixed and not removable.
Which panelboards accept the B345H circuit breaker?
The B345H is a bolt-on breaker designed for Siemens P1, P2, P3, P4, and P5 series commercial panelboards. Because it requires a bolted bus connection, it cannot be installed in standard plug-on residential load centers.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.