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Siemens Q21525CTNC - 15/25A Triplex Miniature Circuit Breaker

Brand Siemens
SKU Q21525CTNC

Siemens Q21525CTNC - 15/25A Triplex Miniature Circuit Breaker

Brand Siemens
SKU Q21525CTNC
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Siemens Q21525CTNC - 15/25A Triplex Miniature Circuit Breaker

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$98.60 In stock

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DescriptionSpecificationsSuperClubWarranties
Description
Built to maximize circuit density, this 15/25A triplex breaker combines three independent circuits into a standard two-pole space. It is specifically designed for residential power distribution where adding a subpanel is not feasible. The Non-CTL plug-on design lacks a rejection clip, allowing it to fit into older Siemens, ITE, and Gould load centers. It acts as an exact substitute for the MP21525NH breaker.

Specifications

Brand Siemens
Series Q
Amperage 15/25A
Voltage 120/240VAC
Poles 4
Phase 1
AIC Rating 10kA @ 120/240VAC
Special Classification Triplex
Mounting Style Plug-On
Terminal Type Lugs
For Use With Siemens Load Centers (Non-CTL), Older ITE/Gould Panels
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed
Wire Gauge 14-6 AWG (Cu), 12-6 AWG (Al)
Max Wire 6 AWG
Min Wire 14 AWG
Available Options Padlock Attachment
Standards CSA C22.2 No. 5, HACR, SWD, UL 489
Approval CSA, UL
Temp Rating 40C
Construction Features HACR Rated, Common Trip, Insta-Wire

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Warranties

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When shopping with SuperBreakers, you’ll have peace of mind knowing that every single item you purchase includes a 60 day warranty, free of charge. Why such confidence? Because only the highest quality electrical parts have a place on our shelves, and we stand by every single one we sell.

If anything goes wrong with your item that is not a result of misuse or normal wear and tear, we’ll gladly replace it at no cost to you.

Click here to read our full warranty details

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.

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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.

5.0
Rated 5.0 out of 5 stars
Based on 43 reviews
Total 5 star reviews: 42 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Reviews Summary
Customers say these circuit breakers arrive quickly and match their specifications perfectly. Many reviews mention success finding hard-to-locate specialty breakers through this supplier. Common feedback includes praise for the accurate product descriptions, reliable shipping, and competitive pricing. While some note occasional stock limitations, users consistently report the breakers fit and function as intended.
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43 reviews
  • GS
    George S.
    Verified Buyer
    Reviewing
    Siemens Q2150B - 150A 2 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/4/26
    Great service

    Every time I call or go online you have the parts I'm looking for.

    Was this helpful?
  • CC
    Curt C.
    Verified Buyer
    Reviewing
    Siemens Q2125 - 125A 2 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    1/23/26
    Q2125

    Brand New Shipped and delivered in 3 days!

    Was this helpful?
  • JF
    James F.
    Verified Buyer
    Reviewing
    Siemens Q2150B - 150A 2 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    12/20/25
    Circuit breaker life saver!!

    Super breakers have always came in clutch when we’re in need of any parts!! And always quick to respond when in need of helpful answers. Thank you!

    Was this helpful?
  • JC
    Joselito C.
    Verified Buyer
    Reviewing
    Siemens Q2100 - 100A 2 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    11/6/25
    Im dine

    Im done

    Was this helpful?
  • AG
    alejandro g.
    Verified Buyer
    Reviewing
    Siemens Q2100 - 100A 2 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    10/31/25
    Great price and great service

    Breakers work great

    Was this helpful?

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