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Siemens 3VA5145-6ED21-0AA0 Molded Case Circuit Breaker

  • 45A
  • 2 Pole
  • Panel Mount
Siemens 3VA5145-6ED21-0AA0
Molded Case Circuit Breaker
Brand Siemens
SKU 3VA5145-6ED21-0AA0
Select Item Condition
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  • 45A
  • 2 Pole
  • Panel Mount

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Siemens 3VA5145-6ED21-0AA0 - 45A 2 Pole Molded Case Circuit Breaker

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$652.50 In Stock

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Description SpecificationsProduct FAQs SuperClub Warranties Shipping Reviews 4.8 (9)

Description

Designed for versatile industrial applications, the Siemens 3VA5145-6ED21-0AA0 is a 2-pole molded case circuit breaker from the SENTRON 3VA5 family. This panel mount MCCB installs into Siemens P1, P2, and P3 panelboards. It serves as a drop-in replacement for the discontinued HED42B045, making it ideal for upgrading legacy systems. The breaker utilizes a TM210 thermal-magnetic trip unit with fixed settings. It delivers a Class H breaking capacity of 65kA at 480V and is HID rated.

Specifications

Key specifications
Brand Siemens
Series 3VA5
Amperage 45A
Poles 2
Mounting Style Panel Mount
Voltage 240VAC, 480VAC, 600Y/347VAC, 250VDC
Phase 1
AIC Rating 150kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 100kA @ 250VDC
Fit and installation
Frame Type 3VA51
Terminal Type Lugs
For Use With Siemens P1, P2, P3 Panelboards, Switchboards
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Fixed Magnetic
Standards and features
Available Options Auxiliary Switch, Alarm Switch, Shunt Trip, Undervoltage Release, Motor Operator, Padlock Attachment, Handle Tie, DIN Rail Adapter, Lug Kits
Accessories None (Nut Keeper Included)
Standards IEC 60947-2, UL 489, HACR, HID
Approval ABS, CE, CSA, EAC, IEC, UL, VDE
Temp Rating -25C to 70C
Construction Features HACR Rated, Reverse Feed, HID Rated

Product FAQs

7 answers
What panelboards are compatible with the Siemens 3VA5145-6ED21-0AA0?

This breaker is designed for use in Siemens P1, P2, and P3 panelboards, as well as compatible Siemens switchboards.

What does the Class H breaking capacity mean for this breaker?

The H designation in the 3VA5 series indicates a high interrupting capacity. For this 45A breaker, it provides up to 65kAIC at 480VAC and 150kAIC at 240VAC, making it suitable for commercial and industrial systems with high fault-current requirements.

What is the physical footprint of this 2-pole breaker?

As part of the Siemens 3VA51 frame family (125A maximum frame size), this 2-pole configuration measures approximately 2 inches wide, 5.5 inches high, and 3.7 inches deep.

What type of trip unit is installed in the 3VA5145-6ED21-0AA0?

It features a TM210 thermal-magnetic trip unit with fixed long-time (thermal) and fixed instantaneous (magnetic) protection functions, commonly referred to as FTFM.

Can this breaker replace older Siemens ED-frame breakers?

Yes, the 3VA51 frame is the modern replacement for legacy Siemens ED-frame circuit breakers, such as the ED42B045 or ED62B045. However, you may need a specific mounting kit or strap kit when retrofitting it into older panelboards.

What type of connection does this breaker use?

The 3VA5145-6ED21-0AA0 features a bolt-on connection for secure mounting in panelboards and switchboards. It accepts standard Siemens 3VA51 lug terminals for wire connections.

Is this breaker suitable for DC voltage applications?

Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for up to 250VDC with an interrupting capacity of 100kAIC, making it versatile for both AC and DC systems.

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Reviews

4.8
Rated 4.8 out of 5 stars
Based on 9 reviews
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9 reviews
  • MR
    Mark R.
    Verified Buyer
    Reviewing
    Siemens 3VA5290-5EC31-0AA0 - 90A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    11/6/26
    Breaker from SuperBreakers

    SuperBreakers had what I needed and got it to me very Fast.

    Was this helpful?
  • EA
    Edward A.
    Verified Buyer
    Reviewing
    Siemens 3VA5112-5EC31-0AA0 - 125A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    9/11/26
    Quick Shipping

    Instock and quick free shipping over a $100

    Was this helpful?
  • JF
    Justin F.
    Verified Buyer
    Reviewing
    Siemens 3VA5450-5EC31-0AA0 - 500A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    9/2/26
    SIEMENS BREAKER WAS SENT NEXT DAY...

    ORDER CAME WHEN IT WAS PROMISSED AND WAS CORRECT... HAPPY CUSTOMER.

    THANK YOU,

    JUSTIN

    Was this helpful?
  • GM
    Gary M.
    Verified Buyer
    Reviewing
    Siemens 3VA5112-4EC31-0AA0 - 125A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 4 out of 5 stars
    6/19/26
    Hard to find Siemens breaker

    Great product at a fair price

    Was this helpful?
  • RJ
    Rene J.
    Verified Buyer
    Reviewing
    Siemens 3VA5212-6EF31-0AA0 - 125A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 4 out of 5 stars
    4/13/26
    Siemens 3VA5212-6EF31-0AA0 

    Item arrived quickly and in perfect condition

    Was this helpful?