BK/S506-V-250-R Equivalent & Substitute Parts

Part Overview

The BK/S506-V-250-R is a 250 mA, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This through-hole component features a 5mm x 20mm axial package and is designed for circuit protection applications requiring controlled response characteristics. The part is currently active in production with 775 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications where the primary part number may be unavailable or where alternative qualified sources are required.

Substiute Parts

BK/S506-V-250-R

Eaton - Electronics DivisionIn Stock: 862BK/S506-V-250-R Datasheet

Current PartRFQ

0034.3111.PT

SCHURTER Inc.In Stock: 18610034.3111.PT Datasheet

DirectRFQ

5STP 250-R

Bel Fuse Inc.In Stock: 13475STP 250-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/S506-V-250-R are qualified based on strict electrical and mechanical parameter matching:

Electrical Parameters (Critical):

• Current Rating: 250 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)

Mechanical Parameters (Critical):

• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (all substitutes meet this requirement)

All identified substitute parts meet these criteria and are therefore electrically and mechanically interchangeable with the main part number in applications designed for the BK/S506-V-250-R specification.

Parameter Comparison

Engineering Selection Recommendations

All three parts—BK/S506-V-250-R, 0034.3111.PT, and 5STP 250-R—are active products with current manufacturing status and full RoHS3 compliance. Selection among these substitutes is based on the following engineering considerations:

BK/S506-V-250-R (Eaton - Electronics Division):

• Approval agencies: BSI, CCC, CSA, IMQ, SEMKO, UR, VDE
• DC Cold Resistance: 0.64 Ohms
• Melting I²t: 0.265
• Current inventory: 775 units

0034.3111.PT (SCHURTER Inc.):

• Approval agencies: cURus
• Operating Temperature: -55°C ~ 125°C (specified)
• Melting I²t: 0.238
• Current inventory: 1780 units
• REACH Status: REACH Unaffected

5STP 250-R (Bel Fuse Inc.):

• Approval agencies: CCC, CE, CSA, cULus, IMQ, SEMKO, VDE
• Operating Temperature: -55°C ~ 125°C (specified)
• DC Cold Resistance: 1.9 Ohms
• Melting I²t: 0.26
• Current inventory: 1270 units
• REACH Status: REACH Unaffected

All parts meet the electrical and mechanical requirements for direct substitution. Selection should be based on application-specific certification requirements, thermal operating conditions, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Are these parts electrically interchangeable with the BK/S506-V-250-R?

A: Yes. The 0034.3111.PT and 5STP 250-R are electrically interchangeable. All three parts share identical current ratings (250 mA), voltage ratings (250 V AC), response characteristics (slow blow), and breaking capacity (35 A).

Q: Do these substitutes fit the same PCB footprint and through-hole spacing?

A: Yes. All three parts use the 5mm x 20mm axial package with through-hole mounting. Physical dimensions vary slightly (within 0.5mm tolerance across diameter and length), but all are compatible with standard 5x20mm fuse holders.

Q: What is the difference in melting I²t values among these parts?

A: Melting I²t values are 0.265 (Eaton), 0.238 (SCHURTER), and 0.26 (Bel Fuse). These minor variations reflect different glass and element compositions but do not affect functional interchangeability for the specified 250 mA, 250 V slow-blow application.

Q: Which part has the lowest DC cold resistance?

A: The BK/S506-V-250-R has a DC cold resistance of 0.64 Ohms. The 5STP 250-R has 1.9 Ohms. The 0034.3111.PT value is not specified in the provided data.

Q: Are all parts RoHS3 compliant?

A: Yes. All three parts are ROHS3 Compliant.

Q: What certifications does each part carry?

A: BK/S506-V-250-R carries BSI, CCC, CSA, IMQ, SEMKO, UR, and VDE approvals. 0034.3111.PT carries cURus approval. 5STP 250-R carries CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE approvals. Application requirements should determine which certification set is necessary.

Q: Which part has the highest current inventory?

A: SCHURTER 0034.3111.PT has 1780 units in stock, followed by Bel Fuse 5STP 250-R with 1270 units, and Eaton BK/S506-V-250-R with 775 units.