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Siemens HED43B045L Molded Case Circuit Breaker
- 45A
- 3 Pole
- Unit Mount
Siemens
HED43B045L
Molded Case Circuit Breaker
Brand
Siemens
SKU
HED43B045L
Quantity
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Siemens HED43B045L - 45A 3 Pole Molded Case Circuit Breaker
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Description
Part of the Sentron ED frame family, this 45A three-pole breaker provides robust long-time and instantaneous trip functions. It serves commercial and industrial power distribution systems requiring high interrupting capacity. The unit mount configuration includes line and load lugs for installation into Siemens enclosures and switchboards. For modern upgrades, it transitions to the 3VA5145-6EC31-6AA0 series. Rated for 100kAIC at 240VAC, it features a non-interchangeable trip unit.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HED43B045L |
| Series | HED4 |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 42kA @ 480VAC, 30kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Enclosures, Switchboards, Motor Control Centers |
| Wire Gauge | 10 AWG - 1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 10 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Line and Load Lugs (LN1E100) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Reverse Feed, Non-Interchangeable Trip, Current Limiting |
Product FAQs
8 answersHow is the HED43B045L breaker mounted in an enclosure?
This is a unit mount, feed-thru circuit breaker. It is designed to be bolted directly to the backpan or mounting plate of compatible Siemens enclosures, switchboards, or motor control centers, rather than plugging onto a busbar.
What wire sizes are compatible with the lugs on this breaker?
The included lugs accept wire sizes ranging from 10 AWG to 1/0 AWG. They are rated for use with both copper (Cu) and aluminum (Al) conductors.
Which equipment is this ED frame breaker designed for?
The HED43B045L is compatible with Siemens switchboards, motor control centers, and individual enclosures configured for Sentron ED frame unit mount breakers.
Can this breaker be used in DC applications?
Yes, this thermal magnetic breaker is rated for up to 250VDC with a maximum interrupting capacity of 30kA at that voltage.
What does the L suffix indicate in the HED43B045L catalog number?
The L suffix indicates that the breaker is supplied with factory-installed line and load side lugs.
Are the trip settings adjustable on this Sentron breaker?
No, this breaker features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous (LI) trip functions cannot be adjusted in the field.
What type of protection does the LI trip function provide?
The LI designation stands for Long-Time and Instantaneous protection. The long-time function protects against sustained overloads, while the instantaneous function trips the breaker immediately during a short circuit.
Is the HED43B045L interchangeable with standard plug-in breakers?
No, this is a feed-thru, unit mount breaker. It cannot be installed in standard load centers that require plug-on or bolt-on bus connections.
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