Littelfuse 021501.6TXP Ceramic Fuse 1.6A 250VAC 5x20mm - Equivalent & Substitute Parts

Part Overview

The Littelfuse 021501.6TXP is an active ceramic cartridge fuse rated for 1.6A at 250VAC with slow-blow response characteristics. This component is designed for applications requiring overcurrent protection in AC/DC circuits with a 5mm x 20mm form factor. Substitute parts are necessary when the primary part is unavailable, when alternative certifications are required for specific markets, or when application-specific performance parameters necessitate alternative designs.

Substiute Parts

021501.6TXP

Littelfuse Inc.In Stock: 849021501.6TXP Datasheet

Current PartRFQ

021501.6HXP

Littelfuse Inc.In Stock: 2257021501.6HXP Datasheet

Parametric EquivalentRFQ

0034.2518

SCHURTER Inc.In Stock: 13850034.2518 Datasheet

MFR RecommendedRFQ

5HT 1.6-R

Bel Fuse Inc.In Stock: 16085HT 1.6-R Datasheet

MFR RecommendedRFQ

BK/S505-1.6-R

Eaton - Electronics DivisionIn Stock: 989BK/S505-1.6-R Datasheet

MFR RecommendedRFQ

0001.2506

SCHURTER Inc.In Stock: 17080001.2506 Datasheet

Parametric EquivalentRFQ

0659C1600-12

Bel Fuse Inc.In Stock: 45150659C1600-12 Datasheet

Parametric EquivalentRFQ

TCC-1.6A

OptiFuseIn Stock: 1500TCC-1.6A Datasheet

Parametric EquivalentRFQ

TCD-1.6A

OptiFuseIn Stock: 2065TCD-1.6A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (1.6A), AC voltage rating (250V), fuse type (cartridge ceramic), package dimensions (5mm x 20mm), and response time classification (slow blow). Parts are grouped into two categories:

Parametric Equivalents maintain identical electrical and mechanical specifications as the main part, differing only in manufacturer, series designation, or minor performance metrics such as melting I²t or DC cold resistance.

Manufacturer Recommended Equivalents meet the core electrical requirements but may include variations in DC voltage rating, response time classification, breaking capacity, or operating temperature range. These parts are suitable for substitution when application requirements permit such variations.

Parameter Comparison

Engineering Selection Recommendations

Direct Parametric Equivalents (021501.6HXP, 5HT 1.6-R, 0659C1600-12, TCD-1.6A) are suitable for direct substitution where the primary part is unavailable. These parts maintain identical current rating, AC voltage rating, response time, and package dimensions. Selection among these equivalents may be based on inventory availability, lead time, or regional certification requirements.

Manufacturer Recommended Equivalents with Variations require application-level assessment:

The SCHURTER 0034.2518 features medium-blow response versus slow-blow, reduced breaking capacity (1.0kA versus 1.5kA), and narrower operating temperature range (-40°C to 85°C). This part is suitable only for applications where medium-blow response is acceptable and operating conditions remain within the specified temperature range.

The SCHURTER 0001.2506 provides enhanced DC voltage rating (300V) while maintaining slow-blow response and 1.5kA breaking capacity. This part is suitable for applications requiring higher DC voltage protection.

The OptiFuse TCC-1.6A features significantly reduced breaking capacity (0.1kA) and should be selected only when application requirements explicitly permit this limitation.

The Eaton BK/S505-1.6-R maintains full electrical equivalence with the primary part and offers comprehensive international certifications (BSI, CCC/CQC, CSA, cULus, IMQ, KC, PSE/JET, SEMKO, VDE).

Frequently Asked Questions (FAQ)

Q: Can I substitute 021501.6HXP for 021501.6TXP without circuit modification?

A: Yes. Both parts are Littelfuse ceramic cartridge fuses with identical current rating (1.6A), AC voltage rating (250V), response time (slow blow), package dimensions (5mm x 20mm), and operating temperature range (-55°C to 125°C). No circuit modification is required.

Q: What is the difference between slow-blow and medium-blow response in the SCHURTER 0034.2518?

A: Response time classification determines the fuse's tolerance to inrush current. Slow-blow fuses tolerate temporary overcurrent conditions before opening, while medium-blow fuses open more rapidly. The SCHURTER 0034.2518 (medium-blow) will interrupt circuits faster than the primary part (slow-blow). Substitution is appropriate only when the application circuit design accommodates medium-blow response characteristics.

Q: Why does the SCHURTER 0001.2506 have a higher DC voltage rating (300V) than the primary part?

A: The 0001.2506 is designed for applications requiring protection in both AC and DC circuits with higher DC voltage levels. The 250V AC rating remains identical to the primary part. This part is suitable for substitution in applications where DC voltage protection up to 300V is beneficial or required.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts are RoHS compliant. The primary part and most substitutes carry ROHS3 Compliant status. The Eaton BK/S505-1.6-R carries RoHS Compliant status. Both designations indicate compliance with RoHS requirements.

Q: What certifications should I verify when selecting a substitute part?

A: Verify that the selected substitute part carries certifications required for your target market or application. The primary part carries CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE approvals. The Eaton BK/S505-1.6-R offers the broadest certification coverage (BSI, CCC/CQC, CSA, cULus, IMQ, KC, PSE/JET, SEMKO, VDE). Other substitutes carry varying certification subsets. Confirm certification