SS-5H-1.25A-AP Equivalent & Substitute Parts

Part Overview

The SS-5H-1.25A-AP is a board mount fuse manufactured by Eaton - Electronics Division, rated for 1.25 A at 300 V AC/DC with slow blow response characteristics. This through-hole radial fuse is designed for circuit protection in industrial and commercial applications requiring reliable overcurrent protection. The part is currently active in production and widely stocked. Substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when packaging requirements differ.

Substiute Parts

SS-5H-1.25A-AP

Eaton - Electronics DivisionIn Stock: 942SS-5H-1.25A-AP Datasheet

Current PartRFQ

SS-5H-1.25A-APH

Eaton - Electronics DivisionIn Stock: 2778SS-5H-1.25A-APH Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SS-5H-1.25A-AP are identified based on electrical and mechanical parameter equivalence. The primary substitution criterion is the matching of all critical electrical parameters: current rating (1.25 A), voltage rating (300 V AC), response time (Slow Blow), breaking capacity (100 A), and melting I²t value (12.75). Mechanical compatibility is ensured through identical mounting type (Through Hole), fuse type classification (Board Mount), package configuration (Radial, Box), and physical dimensions (0.335" L x 0.169" W x 0.329" H).

The substitute part SS-5H-1.25A-APH differs from the main part only in packaging format: it is supplied in Cut Tape (CT) rather than Tape & Box (TB). This packaging difference does not affect electrical performance, thermal characteristics, or mechanical fit. Both parts belong to the same SS-5H series, share identical approval certifications, and maintain the same operating temperature range and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both SS-5H-1.25A-AP and SS-5H-1.25A-APH are active production parts from Eaton - Electronics Division with identical electrical and mechanical specifications. Selection between these parts should be based on packaging and inventory requirements rather than technical performance.

The SS-5H-1.25A-AP in Tape & Box (TB) packaging is suitable for applications requiring boxed component delivery and is currently stocked at 883 pieces. The SS-5H-1.25A-APH in Cut Tape (CT) packaging is suitable for automated assembly processes and high-volume production runs, with significantly higher inventory availability at 2708 pieces.

Both parts carry comprehensive international approvals (CQC, cURus, KC, PSE, TUV, VDE) and maintain RoHS compliance. The identical DC cold resistance (57 Ohms), melting I²t (12.75), and breaking capacity (100 A) ensure equivalent circuit protection performance. Operating temperature range (-40°C to 125°C) and moisture sensitivity level (MSL 1 - Unlimited) are identical across both part numbers.

Frequently Asked Questions (FAQ)

Q: Can SS-5H-1.25A-APH be used as a direct replacement for SS-5H-1.25A-AP?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical current rating (1.25 A), voltage rating (300 V AC), response time (Slow Blow), breaking capacity (100 A), melting I²t (12.75), physical dimensions, and all approval certifications. The only difference is packaging format (Cut Tape versus Tape & Box).

Q: What is the difference between Tape & Box (TB) and Cut Tape (CT) packaging?

A: Tape & Box (TB) packaging supplies components on tape within a protective box, suitable for manual handling and smaller quantity orders. Cut Tape (CT) packaging supplies components on tape without the box, optimized for automated pick-and-place assembly equipment and high-volume manufacturing. Both formats contain the same component with identical specifications.

Q: Are the physical dimensions identical between these two part numbers?

A: Yes. Both SS-5H-1.25A-AP and SS-5H-1.25A-APH have identical dimensions of 0.335" L x 0.169" W x 0.329" H (8.50mm x 4.30mm x 8.35mm). They are both through-hole radial mount fuses with identical package configuration.

Q: Do both parts have the same approval certifications?

A: Yes. Both parts carry identical international approvals: CQC, cURus, KC, PSE, TUV, and VDE. Both are RoHS Compliant and have the same ECCN (EAR99) and HTSUS (8536.10.0040) classifications.

Q: What is the melting I²t value and why is it important?

A: The melting I²t value for both parts is 12.75. This parameter indicates the thermal energy required to melt the fuse element and is critical for ensuring the fuse operates within the intended time-current characteristic curve. Identical I²t values confirm equivalent protection performance.

Q: Can these fuses be used in both AC and DC circuits?

A: Yes. Both parts are rated for 300 V AC/DC operation, indicating they are suitable for use in alternating current and direct current applications within the specified voltage range.