Equivalent & Substitute Parts for S501-250-R Ceramic Fuse Cartridge

Part Overview

The S501-250-R is a ceramic fuse cartridge manufactured by Eaton - Electronics Division, rated at 250 mA, 250 V AC/DC with fast-blow response characteristics. This component is designed for circuits requiring overcurrent protection in a 5mm x 20mm form factor and requires a compatible fuse holder for installation. The part maintains active product status with 687 units in current inventory. Substitute parts are identified based on matching electrical ratings, mechanical dimensions, response time characteristics, and approval agency certifications.

Substiute Parts

S501-250-R

Eaton - Electronics DivisionIn Stock: 789S501-250-R Datasheet

Current PartRFQ

BK/GDA-250MA

Eaton - Electronics DivisionIn Stock: 866BK/GDA-250MA Datasheet

Parametric EquivalentRFQ

0216.250MXP

Littelfuse Inc.In Stock: 21620216.250MXP Datasheet

DirectRFQ

0216.250HXP

Littelfuse Inc.In Stock: 11760216.250HXP Datasheet

Parametric EquivalentRFQ

FCD-250MA

OptiFuseIn Stock: 6811FCD-250MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the S501-250-R is determined by strict equivalence across the following parameters: current rating (250 mA), AC voltage rating (250 V), fuse type (cartridge ceramic), response time (fast blow), mechanical package (5mm x 20mm), and breaking capacity (1.5 kA). All identified substitute parts match these core electrical and mechanical specifications. Differences in secondary parameters such as DC cold resistance, melting I²t values, operating temperature ranges, and approval agency certifications do not disqualify substitution but are documented for engineering reference. Parts are grouped as parametric equivalents when all primary electrical and mechanical criteria align.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts—BK/GDA-250MA, 0216.250MXP, 0216.250HXP, and FCD-250MA—are functionally equivalent to the S501-250-R based on matching electrical ratings, mechanical dimensions, and response characteristics. All parts maintain active product status and are RoHS compliant. Selection among these substitutes may be based on approval agency certifications relevant to the application. The S501-250-R and BK/GDA-250MA are both Eaton products with overlapping certification profiles (BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE). The Littelfuse parts (0216.250MXP and 0216.250HXP) provide extended operating temperature specifications (-55°C ~ 125°C) and certifications including CE and UR. The FCD-250MA from OptiFuse explicitly specifies 250 V DC rating and IEC 60127 certification. Inventory availability varies: FCD-250MA has the highest stock level at 6768 units, followed by 0216.250MXP at 2076 units.

Frequently Asked Questions (FAQ)

Q: Can BK/GDA-250MA directly replace S501-250-R in existing circuits?

A: Yes. Both parts share identical current rating (250 mA), AC voltage rating (250 V), fuse type (cartridge ceramic), response time (fast blow), mechanical package (5mm x 20mm), and breaking capacity (1.5 kA). Both require a compatible fuse holder. DC cold resistance is identical at 4.4 Ohms, and melting I²t values match at 0.027.

Q: What are the differences between Littelfuse 0216.250MXP and 0216.250HXP?

A: Both parts are electrically and mechanically identical with matching current ratings, voltage ratings, response times, and package dimensions. Both specify operating temperature range of -55°C ~ 125°C and DC cold resistance of 2.35 Ohms. Both are ROHS3 compliant with identical approval agencies (CCC, CE, CSA, SEMKO, UR, VDE).

Q: Why does FCD-250MA have a lower melting I²t value (0.004) compared to S501-250-R (0.027)?

A: Melting I²t is a characteristic of the specific fuse element design and does not disqualify substitution when all primary electrical and mechanical parameters match. The FCD-250MA maintains the same current rating, voltage rating, response time, and package dimensions as the S501-250-R.

Q: Does the extended operating temperature range of Littelfuse parts affect substitution suitability?

A: No. The extended operating temperature range (-55°C ~ 125°C) specified for Littelfuse and OptiFuse parts represents an additional capability and does not prevent substitution. The S501-250-R does not specify an operating temperature range, indicating it is suitable for standard industrial conditions.

Q: Are all substitute parts RoHS compliant?

A: Yes. All identified substitutes are RoHS compliant. The S501-250-R, 0216.250MXP, 0216.250HXP, and FCD-250MA are ROHS3 compliant. The BK/GDA-250MA is RoHS compliant.

Q: Which substitute part has the best availability?

A: FCD-250MA from OptiFuse has the highest inventory level at 6768 units in stock, followed by 0216.250MXP at 2076 units.