Equivalent & Substitute Parts for 0216.125HXP

Part Overview

The Littelfuse 0216.125HXP is a ceramic cartridge fuse rated at 125 mA, 250 V AC/DC with a 5mm x 20mm form factor. This fast-blow fuse is designed for applications requiring overcurrent protection in compact spaces and is actively manufactured. Substitute parts are identified based on matching electrical ratings, mechanical dimensions, and approval certifications to ensure direct functional equivalence in circuit protection applications.

Substiute Parts

0216.125HXP

Littelfuse Inc.In Stock: 12320216.125HXP Datasheet

Current PartRFQ

BK/S501-125-R

Eaton - Electronics DivisionIn Stock: 1156BK/S501-125-R Datasheet

DirectRFQ

GDA-125MA

Eaton - Electronics DivisionIn Stock: 827GDA-125MA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0216.125HXP are qualified based on the following critical parameters:

• Current Rating: 125 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Package Dimensions: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity: 1.5 kA (exact match required)
• Mounting Configuration: Requires Holder (exact match required)

The identified substitutes—BK/S501-125-R (Eaton) and GDA-125MA (Eaton)—meet all critical electrical and mechanical parameters. Both parts are active products with current manufacturing status and maintain RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

All three parts—0216.125HXP, BK/S501-125-R, and GDA-125MA—are active products with equivalent electrical and mechanical specifications. Selection among these parts may be based on:

• Approval agency certifications: 0216.125HXP carries CCC, CE, CSA, SEMKO, UL, and VDE approvals. BK/S501-125-R carries CSA and cULus approvals. GDA-125MA carries CSA and UR approvals. Verify that the selected part meets the specific regulatory requirements of your application.
• Inventory availability and lead time considerations.
• DC cold resistance variations: 0216.125HXP specifies 3.675 Ohms, while BK/S501-125-R and GDA-125MA specify 12.3 Ohms. This difference may be relevant in applications with low-voltage DC circuits where resistance characteristics affect circuit behavior.
• Melting I²t characteristics: 0216.125HXP specifies 0.00546, while BK/S501-125-R and GDA-125MA specify 0.0037. These values define thermal energy dissipation during fuse operation and should be evaluated against circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can BK/S501-125-R and GDA-125MA be used interchangeably with 0216.125HXP?

A: Yes, all three parts share identical electrical ratings (125 mA, 250 V AC), fuse type (ceramic cartridge), package dimensions (5mm x 20mm), response time (fast blow), and breaking capacity (1.5 kA). They are mechanically and electrically interchangeable in applications where the specific approval certifications are acceptable.

Q: What are the differences in DC cold resistance between these parts?

A: The 0216.125HXP has a DC cold resistance of 3.675 Ohms, while BK/S501-125-R and GDA-125MA both measure 12.3 Ohms. In DC circuits with low voltage or high current sensitivity, this difference may affect circuit behavior and should be evaluated against circuit design specifications.

Q: Do all three parts require the same holder?

A: Yes, all three parts are 5mm x 20mm ceramic cartridge fuses that require a standard fuse holder designed for this form factor. No holder modifications are necessary when substituting between these parts.

Q: Which approvals should I prioritize for my application?

A: Select the part whose approval certifications match your application requirements. The 0216.125HXP offers the broadest certification coverage (CCC, CE, CSA, SEMKO, UL, VDE). BK/S501-125-R and GDA-125MA carry CSA certifications with additional regional approvals (cULus and UR, respectively). Consult your application's regulatory requirements to determine the appropriate part.

Q: Are there differences in melting I²t values?

A: Yes, the 0216.125HXP specifies a melting I²t of 0.00546, while BK/S501-125-R and GDA-125MA specify 0.0037. The melting I²t value defines the thermal energy required to melt the fuse element. Applications with specific thermal protection requirements should evaluate these differences against circuit protection curves.