Siemens HL2B450 Molded Case Circuit Breaker
- 450A
- 2 Pole
- Bolt-On
Quantity
Siemens HL2B450 - 450A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for heavy-duty commercial environments, this 450A L-Frame breaker delivers robust overcurrent protection across 240V, 480V, and 600V systems. The device bolts into compatible Siemens Sentron panelboards and motor control centers. Equipped with adjustable magnetic trip functions and a 65kAIC rating at 480VAC, it handles significant fault currents safely. Facility managers should note this legacy component crosses over to the newer HLD62B450 for future system upgrades.Specifications
| Brand | Siemens |
|---|---|
| Series | HL |
| Amperage | 450A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 30kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | (2) 3/0 AWG - 500 kcmil (Cu/Al) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 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, Motor Operator, Rotary Handle, Padlock Attachment |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40°C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
7 answersWhat equipment is compatible with the Siemens HL2B450?
This bolt-on L-frame breaker is designed for installation in Siemens Sentron panelboards, switchboards, and motor control centers.
How does the trip unit on the HL2B450 operate?
It utilizes a thermal magnetic trip unit with a fixed thermal element for overload protection and an adjustable magnetic element. The adjustable magnetic trip allows electricians to tune the instantaneous response to accommodate specific inrush currents.
What are the conductor size requirements for the HL2B450 lugs?
The breaker terminals accept two 3/0 AWG to 500 kcmil copper or aluminum conductors per phase.
Is the HL2B450 rated for DC voltage systems?
Yes, in addition to its AC ratings, this breaker is rated for use in 250VDC applications with a 30kAIC interrupting capacity.
Is the HL2B450 a current production or legacy breaker?
The HL2B450 is a legacy Siemens Sentron L-frame molded case circuit breaker. It serves as a direct replacement for existing L-frame breakers in older Sentron gear without requiring panel modifications.
What distinguishes the HL2B450 from standard L-frame breakers?
The HL prefix indicates a high interrupting capacity version of the standard L-frame. It provides elevated fault protection, including 100kAIC at 240VAC and 65kAIC at 480VAC, compared to standard models.
What circuit protection functions does the HL2B450 provide?
It includes Long-Time and Instantaneous (LI) trip functions. The long-time function protects against sustained overloads, while the instantaneous function clears sudden short circuits.
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