Siemens SKP3B120 Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Bolt-On
Quantity
Siemens SKP3B120 - 1200A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for heavy-duty industrial applications, the Siemens SKP3B120 is a 3-pole, 1200A molded case circuit breaker rated up to 600VAC. As part of the Sentron family, it provides reliable protection for high-demand electrical systems. This bolt-on MCCB installs into Siemens P4 and P5 panelboards, as well as SB1, SB2, and SB3 switchboards. For legacy upgrades, it is often replaced by the HND63B120. It features an adjustable magnetic trip and delivers a 65kAIC rating at 480VAC.Specifications
| Brand | Siemens |
|---|---|
| Part Number | SKP3B120 |
| Series | SKP |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC |
| Frame Type | SKP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4/P5 Panelboards, SB1/SB2/SB3 Switchboards |
| Wire Gauge | (4) 1/0 AWG-500 kcmil Cu/Al |
| Max Wire | 500 kcmil |
| Min Wire | 1/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release, Lug Kits, Motor Operator, Rotary Handle, Padlock Attachment |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40°C |
| Construction Features | HACR Rated, High Interrupting Capacity, Interchangeable Trip Unit, Common Trip |
Product FAQs
5 answersWhich Siemens panelboards and switchboards are compatible with the SKP3B120?
This breaker is designed for use in Siemens P4 and P5 panelboards, as well as SB1, SB2, and SB3 switchboards.
What wire sizes are accepted by the standard lugs on this breaker?
The standard lugs accept four wires per phase, ranging from 1/0 AWG to 500 kcmil copper or aluminum conductors.
How is the thermal magnetic trip unit configured on the SKP3B120?
This breaker features a fixed thermal and adjustable magnetic trip unit, providing long-time and instantaneous (LI) protection.
Can the instantaneous trip setting be adjusted?
Yes, the magnetic trip function is adjustable, allowing you to set the instantaneous trip threshold to match your specific system coordination requirements.
What frame family does this breaker belong to?
It is part of the Siemens Sentron series and falls under the SKP frame designation within the PD frame group.
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