BAF-4 Equivalent & Substitute Parts Reference

Part Overview

The BAF-4 is a 4A 250VAC fast-blow cartridge fuse manufactured by Eaton - Bussmann Electrical Division. This midget fuse (5AG, 10mm x 38mm) is designed for electrical and industrial applications requiring holder-mounted protection. The part maintains active product status with 820 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary BAF-4 becomes unavailable or when supply chain optimization is required.

Substiute Parts

BAF-4

Eaton - Bussmann Electrical DivisionIn Stock: 896BAF-4 Datasheet

Current PartRFQ

0BLF004.T

Littelfuse Inc.In Stock: 8110BLF004.T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The BAF-4 substitute relationship is established with the 0BLF004.T (Littelfuse Inc.) based on the following critical parameters:

• Current Rating: Both parts rated at 4A
• Voltage Rating: Both rated at 250VAC
• Fuse Type: Both are cartridge fuses with fast-blow response
• Package Classification: Both conform to 5AG midget standard
• Physical Dimensions: Both measure 0.406" Dia x 1.500" L (10.30mm x 38.10mm)
• Mounting Configuration: Both require holder installation
• Application Domain: Both suitable for electrical and industrial applications

These parameters define the substitution scope. The 0BLF004.T functions as a direct electrical and mechanical equivalent within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

Both the BAF-4 and 0BLF004.T maintain active product status and carry relevant regulatory certifications. The BAF-4 holds CE, CSA, and UL approvals. The 0BLF004.T carries CSA and UR certifications. Selection between these parts should be based on:

• Regulatory Requirements: Verify that the required certification (CE, CSA, UL, or UR) is present in the target application's compliance framework
• RoHS Compliance: The 0BLF004.T is ROHS3 compliant, while the BAF-4 is non-compliant; applications subject to RoHS directives must use the Littelfuse substitute
• Breaking Capacity: The 0BLF004.T provides 10kA breaking capacity versus 200A for the BAF-4; applications requiring higher fault current handling benefit from the Littelfuse part
• Inventory Availability: BAF-4 has 820 units in stock; 0BLF004.T has 763 units available

Both parts are mechanically and electrically interchangeable within the specified 4A 250VAC fast-blow cartridge fuse category.

Frequently Asked Questions (FAQ)

Q: Can the 0BLF004.T directly replace the BAF-4 in existing installations?

A: Yes, within the scope of the specified electrical parameters (4A, 250VAC, fast-blow response) and mechanical compatibility (5AG midget cartridge, holder-mounted). Verify that regulatory certifications required by your application are present in the substitute part.

Q: What is the significance of the different breaking capacities (200A vs. 10kA)?

A: Breaking capacity defines the maximum fault current the fuse can safely interrupt. The 0BLF004.T's 10kA rating provides higher fault current handling capability. Selection depends on the maximum prospective short-circuit current in the protected circuit.

Q: Are there dimensional differences between these parts?

A: Both parts conform to the 5AG midget standard with nominal dimensions of 0.406" Dia x 1.500" L. The 0BLF004.T measures 10.31mm diameter versus 10.30mm for the BAF-4; this 0.01mm difference is within standard manufacturing tolerance and does not affect holder compatibility.

Q: Which part should be selected for RoHS-regulated applications?

A: The 0BLF004.T is ROHS3 compliant and must be used in applications subject to RoHS directives. The BAF-4 is non-compliant and unsuitable for such environments.

Q: Do both parts require the same holder type?

A: Yes. Both are cartridge fuses requiring a 5AG midget fuse holder. Existing holder installations are compatible with either part.