Free Shipping Over $99
Eaton / Cutler-Hammer HLB3100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
HLB3100
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HLB3100
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Eaton / Cutler-Hammer HLB3100 - 100A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Similar Items
175A 3 Pole Molded Case Circuit Breaker
200A 3 Pole Molded Case Circuit Breaker
Description
Engineered for demanding industrial environments, this 100A MCCB provides essential long-time and instantaneous protection for commercial electrical systems. Featuring a standard bolt-on configuration, it installs seamlessly into legacy Westinghouse panelboards. For modern upgrades, this L-frame model can be substituted with the newer HKD3100. With a 65 kAIC rating at 240V, it handles fault currents safely. The interchangeable trip unit allows users to customize the protection curve.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HLB3100-R |
| Series | HLB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Frame Type | HLB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Motor Control Centers, Switchboards |
| Wire Gauge | 4 AWG - 4/0 AWG |
| Max Wire | 4/0 AWG |
| 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, Lug Kits, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | IEC 157-1, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Interchangeable Trip Unit |
Product FAQs
6 answersWhat equipment is the Eaton HLB3100 compatible with?
The HLB3100 is designed for installation in legacy Westinghouse panelboards, motor control centers, and switchboards that accept L-Frame Mark 75 series breakers.
What is the modern replacement for the legacy HLB3100?
For modern panel upgrades, this legacy L-frame breaker is commonly substituted with the newer Eaton Series C HKD3100 or KD3100. Verify your panel mounting hardware requirements before upgrading.
Does the HLB3100 require specific mounting hardware?
Yes. As a bolt-on molded case circuit breaker, it requires the appropriate busbar connectors and mounting brackets specific to your Westinghouse or Eaton panelboard chassis.
Can the HLB3100 be used in DC electrical systems?
Yes. In addition to standard AC voltages, this thermal-magnetic breaker is rated for 250VDC applications, providing a 22kA interrupting capacity for DC systems.
What type of protection does the LI trip function provide on the HLB3100?
The LI designation indicates the trip unit provides Long-Time protection against sustained overloads and Instantaneous protection against severe short circuits.
Is the trip unit on the HLB3100 fully adjustable?
The HLB3100 features a thermal-magnetic trip unit with a fixed thermal element for standard overload protection and an adjustable magnetic element to fine-tune the short-circuit response.
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.