Equivalent & Substitute Parts for BK/PCH-4-SD

Part Overview

The BK/PCH-4-SD is a 4 A, 450 V DC board mount fuse manufactured by Eaton - Electronics Division, part of the PC-Tron® series. This through-hole radial fuse features fast-blow response characteristics and is designed for applications requiring high voltage DC protection. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing procurement and design requirements.

Substiute Parts

BK/PCH-4-SD

Eaton - Electronics DivisionIn Stock: 999BK/PCH-4-SD Datasheet

Current PartRFQ

BK/PCB-4-R

Eaton - Electronics DivisionIn Stock: 5168BK/PCB-4-R Datasheet

Parametric EquivalentRFQ

7100.1171.13

SCHURTER Inc.In Stock: 9667100.1171.13 Datasheet

SimilarRFQ

80814000000

Littelfuse Inc.In Stock: 98780814000000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/PCH-4-SD are classified into two categories based on electrical parameter alignment:

Parametric Equivalent: BK/PCB-4-R matches all critical electrical and mechanical parameters of the main part, including 4 A current rating, 450 V DC voltage rating, fast-blow response, 2.5 kA breaking capacity, and identical physical dimensions. This part is manufactured by the same supplier (Eaton - Electronics Division) and maintains active product status with RoHS3 compliance.

Similar Substitutes: Parts 7100.1171.13 (SCHURTER Inc.) and 80814000000 (Littelfuse Inc.) share the 4 A current rating, fast-blow response, through-hole radial mounting, and board mount configuration. However, these parts operate at reduced voltage ratings (250 V AC/DC) compared to the main part's 450 V DC specification. These substitutes are suitable only for applications where the lower voltage rating is acceptable within the circuit design constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - BK/PCB-4-R: This part is the direct parametric equivalent and is the recommended replacement for the obsolete BK/PCH-4-SD. It maintains identical electrical specifications (4 A, 450 V DC), mechanical dimensions, breaking capacity, and approval certifications (CSA, UL). The BK/PCB-4-R is manufactured by Eaton - Electronics Division and holds active product status with ROHS3 compliance, making it suitable for new designs and legacy system replacements without circuit modification.

Secondary Selection - 80814000000 (Littelfuse TE5® 808 Series): This substitute is applicable only when circuit voltage requirements permit operation at 250 V DC maximum. The part maintains the 4 A current rating, fast-blow response, through-hole radial configuration, and board mount design. The 80814000000 offers higher breaking capacity (10 kA DC) and extended operating temperature range (-40°C to 125°C) compared to the main part. ROHS3 compliance and cULus certification support modern procurement standards.

Tertiary Selection - 7100.1171.13 (SCHURTER FRT 250F Series): This substitute applies to applications operating at 250 V AC/DC maximum. The part shares the 4 A current rating and fast-blow response but features different physical dimensions (11.50mm x 5.00mm x 8.00mm) requiring PCB layout verification. ROHS3 compliance and cURus certification are provided. This option is suitable only when voltage derating is acceptable and board space accommodates the larger footprint.

Frequently Asked Questions (FAQ)

Q: Can BK/PCB-4-R be used as a direct replacement for BK/PCH-4-SD?

A: Yes. BK/PCB-4-R is a parametric equivalent with identical electrical ratings (4 A, 450 V DC), response time (fast-blow), breaking capacity (2.5 kA), physical dimensions, and approval certifications. The only difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modification is required.

Q: What is the key difference between the main part and the similar substitutes?

A: The primary difference is voltage rating. BK/PCH-4-SD operates at 450 V DC, while 7100.1171.13 and 80814000000 operate at 250 V DC maximum. Both similar substitutes are suitable only for circuits designed for 250 V DC operation or lower. Current rating (4 A) and response time (fast-blow) remain consistent across all parts.

Q: Can 7100.1171.13 or 80814000000 be used in a 450 V DC circuit?

A: No. Using a 250 V DC rated fuse in a 450 V DC circuit violates the voltage rating specification and creates a safety hazard. The fuse may fail to operate correctly or experience premature degradation. These substitutes are only applicable when the circuit voltage is 250 V DC or lower.

Q: Are there physical dimension differences that affect PCB compatibility?

A: Yes. BK/PCB-4-R maintains the same dimensions as BK/PCH-4-SD (0.350" L x 0.184" W x 0.345" H). However, 7100.1171.13 is larger (0.453" L x 0.197" W x 0.315" H), requiring PCB layout verification. 80814000000 dimensions are nearly identical to the main part (0.350" L x 0.183" W x 0.350" H) with negligible differences.

Q: What compliance certifications apply to each substitute?

A: BK/PCB-4-R carries CSA and UL certifications matching the main part. 7100.1171.13 holds cURus certification. 80814000000 holds cULus certification. All three substitutes are ROHS3 compliant and REACH unaffected. Verify that the selected certification aligns with your application's regulatory requirements.

Q: What is the difference in breaking capacity between parts?

A: BK/PCH-4-SD and BK/PCB-4-R both provide 2.5 kA breaking capacity at rated voltage. 7100.1171.13 provides 63 A breaking capacity. 80814000000 provides 100 A AC and 10 kA DC breaking capacity. Higher breaking capacity indicates greater fault current handling capability but applies only within the respective voltage ratings.

Q: Is RoHS compliance a factor in selecting a substitute?

A: Yes. BK/PCH-4-SD is RoHS non-compliant, while all substitutes (BK/PCB-4-R, 7100.1171.13, 80814000000) are ROHS3 compliant. For new designs and procurement in regulated markets, ROHS3 compliance is mandatory. BK/PCB-4-R is the preferred choice for RoHS-compliant applications requiring 450 V DC operation.

Q: What packaging options are available?

A: BK/PCH-4-SD is supplied in Box packaging. BK/PCB-4-R is supplied in Bulk packaging. 7100.1171.13 is supplied in Bulk packaging. 80814000000 is supplied in Cut Tape (CT) packaging. Packaging selection affects procurement quantity and handling procedures but does not impact electrical or mechanical performance.