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Siemens Molded Case Circuit Breaker: 90 A Amps, 42kA at 480V AC, Fixed, Load Side Lug - ED-Frame Siemens Molded Case Circuit Breakers
SiemensED-Frame Siemens Molded Case Circuit Breakers

Siemens Molded Case Circuit Breaker: 90 A Amps, 42kA at 480V AC, Fixed, Load Side Lug

The SIEMENS ED-Frame Molded Case Circuit Breaker (SKU 3CMP9) is a 90 A rated device from the HED4 series. It features a fixed instantaneous trip, a maximum AIR rating of 42kA at 480V AC, and accepts any phase…

SKU 3G-OTH-22306

Brand
Siemens
Item
Molded Case Circuit Breaker: 90 A Amps, 42kA at 480V AC, Fixed, Load Side Lug
Category
ED-Frame Siemens Molded Case Circuit Breakers
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Technical Specifications

Siemens
Manufacturer Part Number
HED42B090
Series
HED4
Type
42kA at 480V AC, Fixed, Load Side Lug, Any, HED4
Max. AIR Rating
42kA at 480V AC
Phase Connection
Any
Instantaneous Trip
Fixed
Terminal Connection
Load Side Lug
View Full Spec Sheet

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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS ED-Frame Molded Case Circuit Breaker (SKU 3CMP9) is a 90 A rated device from the HED4 series. It features a fixed instantaneous trip, a maximum AIR rating of 42kA at 480V AC, and accepts any phase connection. The breaker includes load-side lug terminals for wiring.

Frequently Asked Questions

What is the SIEMENS HED42B090 molded case circuit breaker used for?

The SIEMENS HED42B090 is an ED-frame molded case circuit breaker used for overcurrent protection in industrial and commercial electrical distribution systems. It is rated 90 A with a 42kA interrupting capacity at 480V AC, making it suitable for branch circuit protection in panelboards and switchboards.

What are the specifications of the SIEMENS HED42B090 circuit breaker?

The SIEMENS HED42B090 is a 90 A molded case circuit breaker from the HED4 series. It has a maximum AIR rating of 42kA at 480V AC, fixed instantaneous trip, load-side lug terminals, and accepts any phase connection. The manufacturer part number is HED42B090.

Where to buy the SIEMENS HED42B090 circuit breaker worldwide?

You can source the SIEMENS HED42B090 circuit breaker through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this Siemens HED4 series breaker.

How to select the correct SIEMENS molded case circuit breaker for an application?

To select the correct Siemens molded case circuit breaker, match the continuous current rating (e.g., 90 A for the HED42B090) to your load, verify the interrupting capacity (42kA at 480V AC) exceeds available fault current, and confirm terminal type (load-side lug) and phase connection (any) suit your wiring.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens ed-frame siemens molded case circuit breakers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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