Equivalent & Substitute Parts for S505-5-R Ceramic Fuse

Part Overview

The S505-5-R is a 5 A, 250 V AC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse cartridge operates in the 5mm x 20mm package format and requires a compatible fuse holder for installation. The part maintains Active product status with 660 units in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and design compatibility across multiple manufacturers while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Response Time	Slow Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	1.5 kA
Mounting Type	Requires Holder
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the S505-5-R is determined by strict equivalence across the following critical parameters: current rating (5 A), AC voltage rating (250 V), fuse type (cartridge ceramic), response time (slow blow), and physical package dimensions (5mm x 20mm). All substitute parts listed maintain these core specifications. Substitutes are grouped into two categories:

Direct Manufacturer Equivalents (Eaton - Electronics Division): Parts BK/S505-5-R and BK1/S505-5-R are functionally identical variants within the same manufacturer's S505 series, differing only in RoHS compliance designation and internal part numbering.

Parametric Equivalents (Cross-Manufacturer): Parts from Littelfuse Inc., SCHURTER Inc., and Bel Fuse Inc. meet all electrical and mechanical requirements. These parts are interchangeable based on matching current rating, voltage rating, fuse type, response time, package dimensions, and breaking capacity. Minor variations in melting I²t values and DC cold resistance do not affect substitution eligibility within the specified parameter set.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Fuse Type	Response Time	Package	Breaking Capacity (kA)	Melting I²t	RoHS Status	Inventory (Pcs)
S505-5-R	Eaton - Electronics Division	5	250	Cartridge, Ceramic	Slow Blow	5mm x 20mm	1.5	71.3	RoHS Compliant	660
BK/S505-5-R	Eaton - Electronics Division	5	250	Cartridge, Ceramic	Slow Blow	5mm x 20mm	1.5	71.3	ROHS3 Compliant	1122
BK1/S505-5-R	Eaton - Electronics Division	5	250	Cartridge, Ceramic	Slow Blow	5mm x 20mm	1.5	71.3	ROHS3 Compliant	1674
0215005.MXP	Littelfuse Inc.	5	250	Cartridge, Ceramic	Slow Blow	5mm x 20mm	1.5	66.095	ROHS3 Compliant	43653
0215005.HXP	Littelfuse Inc.	5	250	Cartridge, Ceramic	Slow Blow	5mm x 20mm	1.5	66.095	ROHS3 Compliant	3215
0215005.TXP	Littelfuse Inc.	5	250	Cartridge, Ceramic	Slow Blow	5mm x 20mm	1.5	66.095	ROHS3 Compliant	933
0215005.VXP	Littelfuse Inc.	5	250	Cartridge, Ceramic	Slow Blow	5mm x 20mm	1.5	66.095	ROHS3 Compliant	1020
0659C5000-12	Bel Fuse Inc.	5	250	Cartridge, Ceramic	Slow Blow	5mm x 20mm	1.5	92.5	ROHS3 Compliant	2358
0001.2511	SCHURTER Inc.	5	250	Cartridge, Ceramic	Slow Blow	5mm x 20mm	1.5	97.5	ROHS3 Compliant	6382
0001.2711.11	SCHURTER Inc.	5	250	Cartridge, Ceramic	Slow Blow	5mm x 20mm	1.5	97.5	ROHS3 Compliant	10645

Engineering Selection Recommendations

Eaton Direct Equivalents (BK/S505-5-R, BK1/S505-5-R): These parts are recommended as primary substitutes due to identical manufacturer origin and electrical characteristics. Both maintain Active product status and offer higher inventory availability (1122 and 1674 units respectively) compared to the main part. BK1/S505-5-R provides the largest stock position within the Eaton product line.

Littelfuse 215 Series (0215005.MXP, 0215005.HXP, 0215005.TXP, 0215005.VXP): All four variants meet complete electrical and mechanical equivalence. The 0215005.MXP variant offers the highest inventory level (43,653 units) and represents the most readily available cross-manufacturer substitute. All Littelfuse variants carry identical approval certifications including CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE, with operating temperature range of -55°C to 125°C.

SCHURTER SPT Series (0001.2511, 0001.2711.11): Both SCHURTER parts provide parametric equivalence with enhanced DC voltage rating (150 V DC) beyond the AC-only specification of the main part. The 0001.2711.11 variant (SMD-SPT series) offers the highest inventory availability among SCHURTER options (10,645 units). Both maintain Active product status and carry CCC, cURus, and VDE certifications.

Bel Fuse 0659C Series (0659C5000-12): This part meets all core electrical and mechanical requirements with 2,358 units in inventory. It carries CCC, cURus, PSE, and VDE certifications and operates across -55°C to 125°C temperature range.

All substitute parts are RoHS3 compliant and REACH unaffected, supporting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute S505-5-R with BK/S505-5-R or BK1/S505-5-R?

A: Yes. Both BK/S505-5-R and BK1/S505-5-R are direct Eaton equivalents with identical electrical specifications (5 A, 250 V AC, slow-blow ceramic cartridge, 5mm x 20mm package). The primary difference is RoHS compliance designation. Both are fully interchangeable in applications requiring the S505-5-R.

Q: What is the difference between Littelfuse 0215005.MXP, 0215005.HXP, 0215005.TXP, and 0215005.VXP?

A: All four Littelfuse variants are parametrically equivalent to S505-5-R with identical current rating (5 A), voltage rating (250 V AC), fuse type (ceramic cartridge), response time (slow blow), and package dimensions (5mm x 20mm). The letter designations (MXP, HXP, TXP, VXP) represent internal Littelfuse product variants. Selection among these four should be based on inventory availability and procurement lead time.

Q: Can SCHURTER 0001.2511 or 0001.2711.11 be used as direct replacements?

A: Yes. Both SCHURTER parts meet all electrical and mechanical requirements of S505-5-R. Additionally, both provide DC voltage rating (150 V DC) which exceeds the AC-only specification of the main part, offering enhanced capability for mixed AC/DC applications. Physical package dimensions (5mm x 20mm) and all electrical parameters are identical.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status. The main part S505-5-R is RoHS Compliant. All substitutes meet current RoHS3 requirements and are REACH unaffected.

Q: Which substitute part has the highest inventory availability?

A: Littelfuse 0215005.MXP offers the highest inventory level with 43,653 units in stock, followed by SCHURTER 0001.2711.11 with 10,645 units. These options provide optimal supply chain flexibility for high-volume procurement.

Q: Do all substitute parts require the same fuse holder as S505-5-R?

A: Yes. All substitute parts maintain the 5mm x 20mm cartridge package format and require a compatible 5mm x 20mm fuse holder. No holder modifications or upgrades are necessary when substituting between listed parts.

Q: What approval certifications do the substitute parts carry?

A: Eaton variants (BK/S505-5-R, BK1/S505-5-R) carry BSI, CCC/CQC, CSA, cULus, IMQ, KC, PSE/JET, SEMKO, and VDE certifications. Littelfuse variants carry CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE certifications. SCHURTER variants carry CCC, cURus, KC, PSE/JET, and VDE certifications. Bel Fuse 0659C5000-12 carries CCC, cURus, PSE, and VDE certifications. All meet international safety standards.

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