Equivalent & Substitute Parts for AP/ETF-1.6 Board Mount Fuse

Part Overview

The AP/ETF-1.6 is a 1.6 A, 277 V AC board mount fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement. The fuse features a radial, can-style vertical package with slow-blow response characteristics and is approved by SEMKO and UL agencies. Due to its obsolete status, equivalent alternatives from active product lines are required for new designs and replacement applications.

Substiute Parts

AP/ETF-1.6

Eaton - Electronics DivisionIn Stock: 932AP/ETF-1.6 Datasheet

Current PartRFQ

SR-5-1.6A-AP

Eaton - Electronics DivisionIn Stock: 3050SR-5-1.6A-AP Datasheet

SimilarRFQ

0034.6817

SCHURTER Inc.In Stock: 9590034.6817 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP/ETF-1.6 is based on the following critical parameters:

Current Rating: All substitute parts must provide 1.6 A protection to maintain circuit design integrity.

Voltage Rating - AC: The main part is rated for 277 V AC. Substitute parts must have AC voltage ratings equal to or greater than 277 V to ensure safe operation in the original application.

Response Time: Slow-blow characteristic must be maintained to preserve inrush current tolerance in the protected circuit.

Mounting Type and Package: Through-hole radial, can-style vertical mounting is required for PCB compatibility.

Approval Agencies: Substitutes should carry relevant safety certifications (UL, SEMKO, cULus, VDE, etc.) appropriate to the application region.

Two substitute parts have been identified from the active product portfolio:

1. SR-5-1.6A-AP (Eaton - Electronics Division): Active status, 1.6 A, 250 V AC rating
2. 0034.6817 (SCHURTER Inc.): Active status, 1.6 A, 250 V AC / 125 V DC rating

Parameter Comparison

Engineering Selection Recommendations

Voltage Rating Consideration: The main part AP/ETF-1.6 is rated for 277 V AC, while both substitute parts are rated for 250 V AC. For applications operating at or near 277 V AC, the voltage margin is reduced with substitute parts. Applications operating at 250 V AC or below are fully compatible with either substitute.

Breaking Capacity: The main part has a breaking capacity of 100 A at rated voltage, while both substitutes have 35 A AC breaking capacity. Applications with fault currents exceeding 35 A require evaluation of circuit protection adequacy.

Temperature Range: The main part operates from -55°C to 125°C. SR-5-1.6A-AP has a reduced range (-40°C to 85°C), which may not be suitable for extreme temperature environments. Part 0034.6817 matches the original temperature range (-55°C to 125°C).

Product Status and Compliance: Both substitute parts are active products with current manufacturing support. SR-5-1.6A-AP carries RoHS compliance. Part 0034.6817 carries ROHS3 compliance and REACH unaffected status, providing enhanced environmental compliance for regulated markets.

Approval Agencies: Both substitutes carry broader agency approvals (CCC, cULus, KC-MARK, PSE, SEMKO, VDE) compared to the original part (SEMKO, UL), supporting global market applications.

Physical Dimensions: Both substitute parts have slightly larger diameters (0.335" vs. 0.329") and heights (0.319" to 0.335" vs. 0.303"). PCB layout verification is required to confirm footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can SR-5-1.6A-AP be used as a direct replacement for AP/ETF-1.6 in a 277 V AC circuit?

A: SR-5-1.6A-AP is rated for 250 V AC, which is below the original 277 V AC rating. Use in 277 V AC circuits is not recommended without circuit voltage verification and risk assessment. For circuits operating at 250 V AC or lower, this part is suitable.

Q: What is the difference between SR-5-1.6A-AP and 0034.6817?

A: Both parts share the same 1.6 A current rating and 250 V AC voltage rating. Key differences include: 0034.6817 provides dual voltage rating (250 V AC / 125 V DC), operates across the full temperature range (-55°C to 125°C) matching the original part, carries higher melting I²t (30 vs. 24), and includes ROHS3 and REACH compliance. SR-5-1.6A-AP has a reduced operating temperature range (-40°C to 85°C) and RoHS compliance.

Q: Will the physical size difference affect PCB assembly?

A: Both substitute parts have slightly larger diameters and heights than the original AP/ETF-1.6. Verify that the PCB footprint and surrounding component placement accommodate the larger dimensions (0.335" Dia x 0.319" to 0.335" H vs. 0.329" Dia x 0.303" H). Minor layout adjustments may be necessary.

Q: Are both substitute parts suitable for international markets?

A: Yes. SR-5-1.6A-AP carries CCC, cULus, KC-MARK, PSE, SEMKO, and VDE approvals. Part 0034.6817 carries CCC, cURus, KC, PSE/JET, and VDE approvals. Both support global regulatory requirements. Verify specific regional requirements for your application.

Q: What is the impact of the reduced breaking capacity (35 A vs. 100 A)?

A: Breaking capacity defines the maximum fault current the fuse can safely interrupt. If your circuit design includes fault currents exceeding 35 A, the substitute parts may not provide adequate protection. Conduct fault current analysis to confirm compatibility.

Q: Can 0034.6817 be used in DC applications?

A: Yes. Part 0034.6817 is rated for 125 V DC, making it suitable for dual AC/DC applications. The original AP/ETF-1.6 and SR-5-1.6A-AP do not specify DC ratings and are intended for AC applications.

Q: Which substitute part is recommended for new designs?

A: For new designs requiring full temperature range operation (-55°C to 125°C) and dual voltage capability, 0034.6817 is the preferred choice. For applications limited to -40°C to 85°C and AC-only operation at 250 V or below, SR-5-1.6A-AP is suitable. Verify voltage and temperature requirements against your specific application.