Equivalent & Substitute Parts for BK/ATM-4

Part Overview

The BK/ATM-4 is a 4A automotive blade fuse rated for 32V DC operation, manufactured by Eaton - Bussmann Electrical Division. This fast-blow fuse is designed for automotive applications requiring a miniature blade form factor with 1kA breaking capacity. The part is active in production with ROHS3 compliance and REACH unaffected status. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for this critical automotive protection component.

Substiute Parts

BK/ATM-4

Eaton - Bussmann Electrical DivisionIn Stock: 1175BK/ATM-4 Datasheet

Current PartRFQ

ATM-4

Eaton - Bussmann Electrical DivisionIn Stock: 1061ATM-4 Datasheet

Parametric EquivalentRFQ

BK/ATM-4

Eaton - Bussmann Electrical DivisionIn Stock: 1175BK/ATM-4 Datasheet

Parametric EquivalentRFQ

0297004.L

Littelfuse Inc.In Stock: 14410297004.L Datasheet

DirectRFQ

0297004.U

Littelfuse Inc.In Stock: 24050297004.U Datasheet

DirectRFQ

0297004.WXNV

Littelfuse Inc.In Stock: 1776470297004.WXNV Datasheet

DirectRFQ

0297004.WXT

Littelfuse Inc.In Stock: 33170297004.WXT Datasheet

DirectRFQ

0997004.WXN

Littelfuse Inc.In Stock: 33710997004.WXN Datasheet

DirectRFQ

0MIN004.V

Littelfuse Inc.In Stock: 9710MIN004.V Datasheet

DirectRFQ

0MIN004.VP

LittelfuseIn Stock: 11790MIN004.VP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/ATM-4 is determined by strict alignment of the following electrical and mechanical parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating - DC: 32 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: Blade, Miniature (exact match required)
• Breaking Capacity @ Rated Voltage: 1kA (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Physical Dimensions: 0.429" to 0.430" L x 0.150" W x 0.346" to 0.347" H (within tolerance)

Parts meeting all these criteria are classified as direct equivalents. Parts with voltage ratings exceeding 32V DC or differing response time characteristics are listed separately as non-equivalent alternatives and are not suitable for direct substitution in 32V DC circuits.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Full Substitution): Parts ATM-4, 0297004.L, 0297004.U, and 0297004.WXNV meet all electrical and mechanical parameters of the BK/ATM-4. These parts are suitable for direct substitution in 32V DC automotive circuits. All are active products with ROHS3 compliance. Selection among these equivalents may be based on availability, lead time, and approval agency certifications (UL, UR, SAE) as specified in procurement requirements.

Conditional Alternatives (Not Direct Substitutes): Part 0297004.WXT matches all parameters except response time specification is not provided in the data. Part 0997004.WXN is rated for 58V DC and is not suitable for 32V DC circuits. Parts 0MIN004.V and 0MIN004.VP are rated for both 32V AC and 32V DC operation and differ in breaking capacity specification; these are not direct equivalents for DC-only applications.

Compliance Considerations: All recommended direct equivalents maintain ROHS3 compliance and REACH unaffected status consistent with the BK/ATM-4. Approval agency certifications vary by part number; verify SAE, UL, or UR certification requirements against application specifications before final selection.

Frequently Asked Questions (FAQ)

Q: Can 0297004.L be used as a direct replacement for BK/ATM-4? A: Yes. The 0297004.L meets all critical parameters: 4A current rating, 32V DC voltage rating, fast-blow response, miniature blade package, and 1kA breaking capacity. Physical dimensions are within tolerance (10.90mm vs. 10.92mm length). Both are ROHS3 compliant and active products.

Q: Why is 0997004.WXN listed but not recommended as a substitute? A: The 0997004.WXN is rated for 58V DC, not 32V DC. While it shares the same current rating and package form factor, the higher voltage rating makes it unsuitable for direct substitution in 32V DC circuits. Using an over-rated fuse in a lower-voltage application does not provide equivalent protection.

Q: What is the difference between 0297004.WXNV and 0297004.WXT? A: Both parts are Littelfuse MINI® 297 series fuses with 4A, 32V DC ratings and miniature blade packages. The primary difference is DC cold resistance specification: 0297004.WXNV specifies 0.02348 Ohms while 0297004.WXT specifies 23.48 Ohms. This significant difference in resistance affects electrical characteristics and may impact circuit performance. Verify resistance requirements for your application before selection.

Q: Are 0MIN004.V and 0MIN004.VP suitable replacements? A: These parts are rated for both 32V AC and 32V DC operation, whereas the BK/ATM-4 is specified for DC operation only. Additionally, breaking capacity is not specified for these parts. They are not direct equivalents and should not be used as substitutes without verification that AC/DC dual-rating and unspecified breaking capacity meet application requirements.

Q: Does packaging format affect substitution eligibility? A: Yes. The BK/ATM-4 is supplied in bulk packaging. Part 0MIN004.VP is supplied as a 5-pack card. While electrically equivalent to 0MIN004.V, the different packaging format may affect procurement, storage, and assembly processes. Verify packaging compatibility with your supply chain requirements.

Q: What certifications should I verify before selecting a substitute? A: The BK/ATM-4 does not specify approval agency certifications. However, substitute parts carry different certifications: 0297004.L and 0297004.U carry UL and SAE certifications; 0297004.WXNV carries no specified approval agency; 0297004.WXT carries UR certification. Confirm that the selected substitute's certifications align with your application's regulatory and safety requirements.