SCHURTER 7100.1021.13 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The SCHURTER 7100.1021.13 is a 4 A, 250 V AC/DC board mount fuse with slow blow response characteristics, designed for through-hole radial mounting in radial box package configuration. This component is classified as Active product status with full ROHS3 compliance and cURus approval certification. Substitute parts are identified when equivalent electrical ratings, mechanical mounting compatibility, and regulatory compliance parameters align with the original specification.

Substiute Parts

7100.1021.13

SCHURTER Inc.In Stock: 11287100.1021.13 Datasheet

Current PartRFQ

7100.1121.13

SCHURTER Inc.In Stock: 9647100.1121.13 Datasheet

Parametric EquivalentRFQ

37211250001

Littelfuse Inc.In Stock: 2112637211250001 Datasheet

DirectRFQ

39214000000

Littelfuse Inc.In Stock: 34970339214000000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SCHURTER 7100.1021.13 are classified based on strict alignment of the following critical parameters:

Primary Equivalence Criteria:

• Current Rating: 4 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Mounting Type: Through Hole (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
• Response Time: Slow Blow (exact match required)
• RoHS Status: ROHS3 Compliant (minimum requirement)

Parametric Equivalent Classification: Part 7100.1121.13 (SCHURTER Inc.) meets all primary equivalence criteria with identical electrical ratings, mounting configuration, and regulatory compliance. This part represents a direct parametric equivalent within the same manufacturer series (FRT 250T).

Direct Manufacturer Equivalent Classification: Part 39214000000 (Littelfuse Inc., TE5® 392 series) matches all primary equivalence criteria. Differences in breaking capacity (40 A vs. 50 A), melting I²t (100 vs. 25), and operating temperature maximum (125°C vs. 85°C) represent enhanced performance characteristics that do not prevent substitution when the original specification requirements are met.

Non-Equivalent Part: Part 37211250001 (Littelfuse Inc., TR5® 372 series) does not qualify as a substitute due to current rating mismatch (1.25 A vs. 4 A required). This part is included in the source data but fails the primary equivalence criterion.

Parameter Comparison

Engineering Selection Recommendations

SCHURTER 7100.1121.13 is the primary substitute option. Both parts are manufactured by SCHURTER Inc., belong to the identical FRT 250T series, and demonstrate complete parametric equivalence across all electrical and mechanical specifications. Both parts maintain Active product status and ROHS3 compliance. Selection between 7100.1021.13 and 7100.1121.13 may be determined by inventory availability and lead time considerations, as no technical differentiation exists.

Littelfuse 39214000000 qualifies as a direct manufacturer equivalent substitute. This part maintains all required electrical ratings (4 A, 250 V AC, slow blow response) and mounting configuration (through-hole, board mount, radial box package). The Littelfuse part provides enhanced regulatory certifications (CQC, cULus, KC, PSE/JET, SEMKO, VDE vs. cURus only) and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). The higher melting I²t value (100 vs. 25) and lower breaking capacity (40 A vs. 50 A) represent performance characteristic differences that do not prevent substitution when the original circuit design requirements are satisfied. Active product status and ROHS3 compliance are maintained.

Frequently Asked Questions (FAQ)

Q: Can SCHURTER 7100.1121.13 be used as a direct replacement for SCHURTER 7100.1021.13?

A: Yes. Both parts are parametrically equivalent with identical current rating (4 A), voltage rating (250 V AC), response time (slow blow), mounting type (through hole), package configuration (radial box), operating temperature range (-40°C to 85°C), and regulatory compliance (ROHS3, cURus). No circuit redesign or board layout modification is required.

Q: Is Littelfuse 39214000000 compatible with applications designed for SCHURTER 7100.1021.13?

A: Yes, when the original circuit design requirements are met. The Littelfuse part maintains the required 4 A current rating, 250 V AC voltage rating, slow blow response, and through-hole board mount configuration. The extended operating temperature range (-40°C to 125°C) and enhanced regulatory certifications (CQC, cULus, KC, PSE/JET, SEMKO, VDE) provide additional compliance flexibility. The higher melting I²t (100 vs. 25) and lower breaking capacity (40 A vs. 50 A) must be evaluated against specific circuit protection requirements.

Q: Why is Littelfuse 37211250001 not listed as a substitute?

A: The Littelfuse 37211250001 has a current rating of 1.25 A, which does not match the required 4 A specification. Fuse current rating is a critical parameter that cannot be altered without changing circuit protection characteristics. This part is not suitable for applications requiring 4 A protection.

Q: What are the key parameters that determine fuse substitutability?

A: Current rating, voltage rating, response time (fast blow vs. slow blow), mounting type, and package configuration are the primary parameters that determine substitutability. All substitute parts listed maintain exact equivalence in these parameters. Secondary parameters such as breaking capacity, melting I²t, and operating temperature range may vary but do not prevent substitution when circuit design requirements are satisfied.

Q: Are all listed substitute parts in active production?

A: Yes. SCHURTER 7100.1021.13, SCHURTER 7100.1121.13, and Littelfuse 39214000000 all maintain Active product status. All parts are ROHS3 compliant and available in current inventory.