Siemens / ITE KL3B400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE KL3B400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for heavy-duty applications, the Siemens KL3B400 serves as a 3-pole, 400A molded case circuit breaker. It delivers robust thermal-magnetic protection with an interchangeable trip unit, making it ideal for industrial power systems. This bolt-on breaker is an exact replacement for legacy ITE panelboards, including the CDP-7 and FC-I. Using this match avoids the complex retrofit kits required for the newer JXD63B400 model. It delivers a 42 kAIC rating at 240VAC and is HACR rated.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | KL3B400-R |
| Series | KL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Legacy ITE Panelboards (e.g., CDP-6, CDP-7, FC-I, SB-1) |
| Wire Gauge | 1/0 AWG - 500 kcmil (Al/Cu) |
| 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
Product FAQs
5 answersWhich panelboards are compatible with the KL3B400 circuit breaker?
This bolt-on breaker is designed for legacy ITE and Siemens panelboards, including the CDP-6, CDP-7, FC-I, and SB-1 series. Using this exact match avoids the need for complex retrofit kits required by newer frame types.
How does the trip unit function on the KL3B400?
It features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection. The adjustable magnetic trip allows for coordination with downstream devices or motor inrush currents.
What wire sizes are accepted by the lugs on the KL3B400?
The standard lugs accept aluminum or copper wire ranging from 1/0 AWG to 500 kcmil. Always refer to the manufacturer label on the breaker or lug for specific torque requirements during installation.
Is the KL3B400 a direct replacement for older ITE K-frame breakers?
Yes, the KL3B400 is an exact drop-in replacement for older ITE and Siemens KL-frame 400A breakers. Installing this model allows you to maintain existing switchgear without modifying the primary bus or installing intermediary contacts.
Can the KL3B400 be used in DC power applications?
Yes, this breaker carries a 250VDC rating with a 10kA interrupting capacity, making it suitable for industrial DC drives, battery backups, and specific solar applications that fall within its voltage and amperage limits.
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