Replacement circuit breakers

Modern replacement circuit breakers for legacy electrical panels

N-HTB manufactures newly built replacement circuit breakers for selected Federal Pacific, Zinsco and Pushmatic applications. Find the model, review the documentation and request availability in a few clear steps.

Complete covered circuit breakers: ETL Listed to UL 489
New—not refurbished
Made in Taiwan
10-year limited warranty

Browse Products Download Catalogs

3 product familiesFPE, Zinsco and Pushmatic

68 product modelsIn the online product directory

Made in TaiwanPrecision manufacturing

10-year warrantyLimited warranty support

Product families

Start with your existing panel family

Use the series filters to narrow the catalog, then match the model, amperage, pole count and voltage to your application.

26 active models

Federal Pacific (FPE)

Newly manufactured replacement models for selected Federal Pacific Electric and Stab-Lok panel applications.

View Federal Pacific models

29 active models

Zinsco

Replacement models for selected Zinsco panel applications, including ratings from 15 A through 125 A.

View Zinsco models

13 active models

Pushmatic

Replacement models for selected Pushmatic panel applications in common residential ratings.

View Pushmatic models

Connection quality

Why terminal construction matters

Heat at a loose, damaged or underspecified electrical connection can shorten equipment life and create a serious hazard. N-HTB uses newly manufactured, model-specific components designed for the intended replacement application.

Review the panel label and existing circuit breaker before ordering.
Match amperage, pole count, voltage and compatible series.
Use current product documents and a qualified electrician.

Comparison images are supporting product information. Results depend on test conditions and installation; refer to current listing records and technical documents for formal verification.

UL-recognized terminal component distinction: N-HTB’s output terminal components for its Federal Pacific (FPE), Zinsco and Pushmatic replacement circuit breaker families are UL Recognized under File E538985, category ZMMT2. This component recognition does not mean that the complete circuit breaker is UL Listed, and it does not replace or expand the complete circuit breaker's ETL Listing by Intertek.

Federal Pacific comparison terminal block from another source — **Federal Pacific comparison sample**Non-N-HTB terminal block shown after extended-load testing. Extended operation at full rated current may generate excessive heat at an improperly designed, damaged or inadequately secured output terminal connection, potentially increasing the risk of equipment damage or fire. Results depend on test and installation conditions.

N-HTB Federal Pacific replacement terminal block — **N-HTB Federal Pacific sample**N-HTB output terminal components are UL Recognized under File E538985, category ZMMT2. This recognition applies to the terminal component, not to the complete circuit breaker.

Pushmatic comparison terminal block from another source — **Pushmatic comparison sample**Non-N-HTB terminal block shown after extended-load testing. Extended operation at full rated current may generate excessive heat at an improperly designed, damaged or inadequately secured output terminal connection, potentially increasing the risk of equipment damage or fire. Results depend on test and installation conditions.

N-HTB Pushmatic replacement terminal block — **N-HTB Pushmatic sample**N-HTB output terminal components are UL Recognized under File E538985, category ZMMT2. This recognition applies to the terminal component, not to the complete circuit breaker.

Zinsco comparison terminal block from another source — **Zinsco comparison sample**Non-N-HTB terminal block shown after extended-load testing. Extended operation at full rated current may generate excessive heat at an improperly designed, damaged or inadequately secured output terminal connection, potentially increasing the risk of equipment damage or fire. Results depend on test and installation conditions.

N-HTB Zinsco replacement terminal block — **N-HTB Zinsco sample**N-HTB output terminal components are UL Recognized under File E538985, category ZMMT2. This recognition applies to the terminal component, not to the complete circuit breaker.

Clear product value

Built for a straightforward replacement decision

Newly manufactured

N-HTB circuit breakers are produced as new replacement products—not refurbished or reclaimed units.

Model-specific selection

Each product card clearly presents the model, SKU, amperage, pole count, voltage and intended panel family.

Documentation and support

Download product-family catalogs, request availability and contact the team before ordering a replacement.

Certification clarity

Two records, two different scopes

The complete circuit breaker ETL listing and the UL-recognized terminal component record should be read separately.

Complete circuit breaker

ETL Listed to UL 489

This statement applies to complete circuit breaker models included within the current Intertek listing scope. The ETL Listed Mark is a finished-product certification mark issued by Intertek, an OSHA-recognized Nationally Recognized Testing Laboratory.

Verify: Search the Intertek ETL Listed Products Directory by manufacturer or exact model. The official directory controls current status and model coverage.

Open Intertek ETL Directory

Output terminal component

UL Recognized Component, File E538985, category ZMMT2

This UL record applies to the equipment-wiring terminal component identified in the file. It is component recognition only and must not be read as a separate UL Listing for the complete circuit breaker.

Important: Component recognition does not replace, broaden or extend the ETL listing scope of the finished circuit breaker.

View UL File E538985

See verification steps and scope notes

Have the panel label or existing circuit breaker model?

Search the product directory by model or SKU, or send the details to N-HTB for product support.

Find a Model Ask for Support