Littelfuse 23016300021 Ceramic Fuse 6.3A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 23016300021 is a ceramic cartridge fuse rated at 6.3A 250VAC with fast-blow response characteristics. This component is designed for circuit protection in AC/DC applications requiring a 5mm x 20mm form factor. The part maintains active product status and is available in original stock inventory. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling component sourcing flexibility while maintaining circuit protection integrity.

Substiute Parts

23016300021

Littelfuse Inc.In Stock: 89823016300021 Datasheet

Current PartRFQ

23016300021P

Littelfuse Inc.In Stock: 136023016300021P Datasheet

Parametric EquivalentRFQ

0034.0909

SCHURTER Inc.In Stock: 10520034.0909 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of electrical and mechanical parameters. The primary criteria for equivalency are: current rating (6.3A), voltage rating (250VAC), fuse type (cartridge ceramic), package dimensions (5x20mm), and response characteristic (fast blow). Parts meeting these core parameters are classified as direct substitutes. Secondary parameters including breaking capacity, melting I²t, operating temperature range, and compliance certifications are documented to support engineering selection but do not disqualify substitution based on the allowed parameter set for this product category.

Parameter Comparison

Engineering Selection Recommendations

All three parts meet the core electrical and mechanical substitution criteria: 6.3A current rating, 250VAC voltage rating, ceramic cartridge construction, and 5x20mm package dimensions with fast-blow response.

Littelfuse 23016300021P is a parametric equivalent manufactured by Littelfuse Inc. with identical electrical specifications to the main part number. This variant achieves ROHS3 compliance, addressing regulatory requirements where RoHS certification is mandated. Selection of 23016300021P is appropriate when RoHS3 compliance is a design requirement.

SCHURTER 0034.0909 is a direct manufacturer substitute from SCHURTER Inc. meeting all core substitution parameters. This part demonstrates enhanced breaking capacity (1.5kA versus 1kA) and extended operating temperature range (-40°C to 85°C versus -25°C to 70°C). SCHURTER 0034.0909 is suitable for applications requiring higher fault current handling or operation in extended temperature environments. ROHS3 compliance and REACH unaffected status are documented.

Selection between these parts is determined by compliance requirements, thermal operating conditions, and fault current specifications of the target application circuit.

Frequently Asked Questions (FAQ)

Q: Can SCHURTER 0034.0909 be used as a direct replacement for Littelfuse 23016300021?

A: Yes. Both parts share identical current rating (6.3A), voltage rating (250VAC), fuse type (ceramic cartridge), package dimensions (5x20mm), and response characteristic (fast blow). The SCHURTER part provides higher breaking capacity and wider operating temperature range, making it suitable for equivalent or more demanding circuit protection applications.

Q: What is the difference between Littelfuse 23016300021 and 23016300021P?

A: Both parts are manufactured by Littelfuse Inc. with identical electrical and mechanical specifications. The primary difference is RoHS compliance status: 23016300021 is RoHS non-compliant, while 23016300021P achieves ROHS3 compliance. Selection depends on regulatory requirements of the target application or end market.

Q: Are all three parts compatible with the same fuse holder?

A: Yes. All three parts conform to the 5mm x 20mm package standard and require a compatible cartridge fuse holder. Physical dimensions are equivalent within tolerance, ensuring mechanical compatibility in standard 5x20mm fuse holder installations.

Q: Does the higher breaking capacity of SCHURTER 0034.0909 affect circuit protection performance?

A: No. Breaking capacity defines the maximum fault current the fuse can safely interrupt without rupture or hazard. Higher breaking capacity (1.5kA) does not alter the fuse's response to normal or overload currents. The 6.3A current rating and fast-blow response remain the primary protection characteristics.

Q: What is the significance of the melting I²t parameter difference?

A: Melting I²t quantifies the thermal energy required to melt the fuse element. SCHURTER 0034.0909 (5.95) has slightly higher melting I²t compared to Littelfuse parts (5). This minor difference reflects manufacturing tolerance and material characteristics but does not disqualify substitution for applications designed around the 6.3A rating.