Siemens / ITE K3B100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE K3B100 - 100A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy K-frame lineup, the Siemens K3B100 provides 100A of reliable power distribution for commercial and industrial facilities. This 3-pole, 600VAC molded case circuit breaker features a robust bolt-on mounting design. It installs into Siemens P4 and P5 panelboards as well as compatible switchboards. As an exact replacement for older ITE systems, it eliminates the need for retrofitting. The unit features interchangeable trip units and delivers a 25kAIC rating at 240VAC.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | K3B100-R |
| Series | K3B |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 14kA @ 600VAC |
| Frame Type | K |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4, P5 Panelboards, Switchboards |
| Wire Gauge | 4 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 4 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, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit, Trip-Free Mechanism |
Product FAQs
5 answersWhich panelboards accept the K3B100 circuit breaker?
The K3B100 is a bolt-on breaker designed specifically for commercial and industrial distribution. It mounts directly into Siemens P4 and P5 panelboards, as well as compatible Siemens switchboards.
Can I adjust the trip settings on the K3B100?
Yes, the magnetic instantaneous trip function is adjustable, allowing you to modify the short-circuit response. However, the thermal overload protection remains fixed.
Are the standard lugs on the K3B100 rated for aluminum wire?
Yes, the included lugs are dual-rated for both aluminum and copper conductors, accommodating wire sizes from 4 AWG up to 350 kcmil.
Are ITE and Siemens K3B100 breakers interchangeable?
Yes. Siemens acquired ITE and continued manufacturing the same legacy K-frame designs. A K3B100 branded as ITE is functionally identical to one branded as Siemens and will fit the same panelboard spaces.
What does the LI trip function code mean for this breaker?
The LI designation specifies that the thermal magnetic trip unit provides Long-Time (L) protection against sustained overloads and Instantaneous (I) protection against short circuits.
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.