SCHURTER 2020.0004 Fuse Cartridge 1A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The SCHURTER 2020.0004 is a 1A 250VAC slow blow fuse cartridge in 5x20mm form factor, designed for telecom applications. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and component procurement. The cartridge requires a compatible fuse holder for installation and operates across a temperature range of -40°C to 85°C with a breaking capacity of 1.5kA at rated voltage.

Substiute Parts

2020.0004

SCHURTER Inc.In Stock: 8592020.0004 Datasheet

Current PartRFQ

BK/S505-1-R

Eaton - Electronics DivisionIn Stock: 1388BK/S505-1-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCHURTER 2020.0004 is determined by strict alignment of the following electrical and mechanical parameters:

• Current Rating: 1A (exact match required)
• Voltage Rating (AC): 250VAC (exact match required)
• Package / Case: 5x20mm (exact match required)
• Fuse Type: Cartridge (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Breaking Capacity @ Rated Voltage: 1.5kA (exact match required)

The Eaton Electronics Division BK/S505-1-R meets all substitution criteria and is classified as an active product, providing a direct functional equivalent for the obsolete SCHURTER component.

Parameter Comparison

Engineering Selection Recommendations

The Eaton Electronics Division BK/S505-1-R is the qualified substitute for the obsolete SCHURTER 2020.0004. Selection rationale is based on:

• Exact electrical parameter alignment: 1A current rating, 250VAC voltage rating, 1.5kA breaking capacity, and slow blow response time
• Identical mechanical form factor: 5x20mm cartridge package with holder-based mounting
• Active product status: The Eaton component is currently in production, ensuring availability for procurement and long-term supply chain continuity
• Regulatory compliance: Both components maintain ROHS3 compliance, REACH unaffected status, and identical tariff classification (HTSUS 8536.10.0040)
• Certification coverage: The Eaton substitute carries broader approval agency recognition (BSI, CCC/CQC, CSA, cULus, IMQ, KC, PSE/JET, SEMKO, VDE) compared to the original component (CSA, UR, VDE)

The ceramic construction of the Eaton component and marginally higher melting I²t value (1.28 versus 1.1) do not affect functional equivalence within the specified electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can the Eaton BK/S505-1-R be used as a direct replacement for the SCHURTER 2020.0004?

A: Yes. Both components share identical current rating (1A), voltage rating (250VAC), package dimensions (5x20mm), response time (slow blow), and breaking capacity (1.5kA). The Eaton component is mechanically and electrically interchangeable within any circuit designed for the SCHURTER part.

Q: What is the significance of the ceramic construction in the Eaton substitute?

A: Ceramic construction is a material specification that does not alter the electrical performance or substitution eligibility. Both cartridge types meet the same current, voltage, and breaking capacity requirements and function identically in holder-based fuse applications.

Q: Are there any compliance or certification differences between the two parts?

A: Both components are ROHS3 compliant and REACH unaffected. The Eaton substitute carries additional approval agency certifications (BSI, CCC/CQC, IMQ, KC, PSE/JET, SEMKO) beyond the original SCHURTER certifications (CSA, UR, VDE). This broader certification coverage does not restrict compatibility and may provide additional regulatory flexibility in certain markets.

Q: Does the difference in melting I²t values affect substitution?

A: No. The melting I²t parameter describes thermal energy absorption characteristics but does not change the fuse's response to the specified 1A current rating or its 1.5kA breaking capacity. Both values fall within acceptable ranges for slow blow cartridge fuses in this category.

Q: What holder compatibility should be verified?

A: Both the SCHURTER 2020.0004 and Eaton BK/S505-1-R require a compatible 5x20mm fuse holder. Verify that the existing holder is rated for 250VAC and 1A minimum. The identical 5x20mm form factor ensures mechanical fit in any standard holder designed for this package size.