Equivalent & Substitute Parts for 125NHG02B

Part Overview

The 125NHG02B is a square fuse manufactured by Eaton - Bussmann Electrical Division, rated for 125A at 500 VAC / 250 VDC with fast-blow response characteristics. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing maintenance and replacement applications in electrical and industrial systems. The part features VDE approval, indicating compliance with European electrical safety standards, and is RoHS compliant.

Substiute Parts

125NHG02B

Eaton - Bussmann Electrical DivisionIn Stock: 1294125NHG02B Datasheet

Current PartRFQ

125NHG01B

Eaton - Bussmann Electrical DivisionIn Stock: 957125NHG01B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 125NHG02B is determined by electrical and mechanical compatibility across the following critical parameters:

• Current Rating: 125A (exact match required)
• Voltage Rating: 500 VAC / 250 VDC (exact match required)
• Fuse Type: Square (exact match required)
• Response Time: Fast Blow (exact match required)
• Class: NH (exact match required)
• Breaking Capacity: 120kA (exact match required)
• Melting I²t: 25000 (exact match required)

The 125NHG01B meets all electrical substitution criteria. Physical dimensions differ between the two parts, which affects mounting compatibility based on holder specifications. The 125NHG01B is currently in active product status, whereas the 125NHG02B is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The 125NHG01B is electrically and functionally equivalent to the 125NHG02B across all critical electrical parameters. The primary distinction is product status: the 125NHG02B is obsolete while the 125NHG01B is active, making the latter the appropriate selection for new applications and ongoing replacements.

Both parts carry VDE approval and meet RoHS compliance requirements. The 125NHG01B demonstrates enhanced compliance with ROHS3 standards. Physical dimensions differ between the two parts; verification of holder compatibility with the specific mounting application is necessary prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the 125NHG01B directly replace the 125NHG02B in existing installations?

A: Electrical substitution is valid based on identical current rating, voltage rating, response time, breaking capacity, and melting I²t values. Physical dimension differences require confirmation that the fuse holder accommodates the 125NHG01B dimensions (75.00mm x 30.00mm x 50.00mm).

Q: What is the significance of the dimension difference between these two parts?

A: The 125NHG02B measures 75.00mm x 52.00mm x 55.00mm while the 125NHG01B measures 75.00mm x 30.00mm x 50.00mm. The length remains constant; width and height are reduced in the substitute part. Holder compatibility must be verified for the specific application.

Q: Are there compliance differences between the two parts?

A: Both parts are RoHS compliant. The 125NHG01B carries ROHS3 certification, representing a more current compliance standard. Both parts maintain VDE approval.

Q: Why is the 125NHG02B listed as obsolete?

A: Product obsolescence indicates the part is no longer manufactured. The 125NHG01B, as an active product from the same manufacturer with identical electrical specifications, serves as the current equivalent for procurement and replacement purposes.