Siemens CE3B045 Molded Case Circuit Breaker
- 45A
- 3 Pole
- Bolt-On
Quantity
Siemens CE3B045 - 45A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
The CE3B045 is a 3-pole, 45A molded case circuit breaker from Siemens' legacy Cordon family. Built for industrial applications, it utilizes thermal-magnetic trip technology for reliable overcurrent protection. This bolt-on MCCB mounts into Siemens P2, P3, and older ITE panelboards. As a discontinued CE-frame unit, it serves as a drop-in replacement for existing setups, though it is superseded by the CED63B045.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CE3B045-R |
| Series | CE |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 100kA @ 480VAC, 100kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P2, P3 Panelboards, Siemens/ITE Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG (Cu), 12 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Non-Interchangeable Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
| Special Features | Current Limiting (Integrally Fused) |
Product FAQs
5 answersWhat panelboards accept the CE3B045 circuit breaker?
This bolt-on C-frame breaker is designed for installation in Siemens P2 and P3 panelboards, as well as legacy Siemens and ITE panelboards configured for C-frame MCCBs.
What is the modern replacement for the legacy CE3B045?
The CE3B045 is a discontinued CE-frame unit from the legacy Cordon family. It is directly superseded by the Siemens CED63B045, which serves as the current active replacement.
Do I need additional hardware to mount the CE3B045 in a P2 or P3 panelboard?
Yes, if your panelboard does not already have the appropriate mounting provisions, you will need a compatible branch strap kit (such as the BBKB32 twin-mount kit) to install this C-frame breaker.
How does the current-limiting feature of the CE3B045 protect electrical systems?
As an integrally fused, current-limiting breaker, it clears high-level short circuits in a fraction of a cycle. This drastically reduces the peak let-through current and energy, protecting sensitive downstream equipment from severe thermal and mechanical damage.
Can I install the CE3B045 in a panelboard from a different manufacturer?
No. The CE3B045 is UL listed specifically for use in compatible Siemens and legacy ITE panelboards. Installing it in a panelboard from another brand violates its UL listing and creates a severe fire and safety hazard.
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