Equivalent & Substitute Parts for BK/PCB-3 Board Mount Fuse

Part Overview

The BK/PCB-3 is a 3 A, 250 V AC / 450 V DC board mount fuse manufactured by Eaton - Electronics Division as part of the PC-Tron® series. This component is classified as obsolete, with 1,042 pieces currently in stock. The fuse features fast blow response characteristics and is designed for through-hole radial mounting in a box package configuration.

Due to the obsolete product status of BK/PCB-3, equivalent substitute parts with active product status are available. These substitutes maintain identical electrical and mechanical specifications while offering improved availability and compliance with current regulatory standards.

Key Parameters

Parameter	Specification
Current Rating	3 A
Voltage Rating - AC	250 V
Voltage Rating - DC	450 V
Response Time	Fast Blow
Mounting Type	Through Hole
Fuse Type	Board Mount (Cartridge Style Excluded)
Package / Case	Radial, Box
Breaking Capacity @ Rated Voltage	50 A AC, 4.4 kA DC
Melting I²t	0.75
Size / Dimension	0.350" L x 0.184" W x 0.345" H (8.89 mm x 4.67 mm x 8.76 mm)
Approval Agency	CSA, UL
Series	PC-Tron®

Substitute Part Grouping Explanation

Substitution of BK/PCB-3 with equivalent parts is based on strict parameter matching across all electrical and mechanical specifications. The following criteria determine substitutability:

Electrical Parameters (Must Match Exactly):

Current Rating: 3 A
Voltage Rating - AC: 250 V
Voltage Rating - DC: 450 V
Response Time: Fast Blow
Breaking Capacity @ Rated Voltage: 50 A AC, 4.4 kA DC
Melting I²t: 0.75

Mechanical Parameters (Must Match Exactly):

Mounting Type: Through Hole
Fuse Type: Board Mount (Cartridge Style Excluded)
Package / Case: Radial, Box
Size / Dimension: 0.350" L x 0.184" W x 0.345" H (8.89 mm x 4.67 mm x 8.76 mm)

Certification Requirements:

Approval Agency: CSA, UL

All substitute parts listed maintain these specifications without deviation. Substitutes differ only in product status (active versus obsolete) and regulatory compliance certifications (RoHS3 compliance and REACH status).

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage AC	Voltage DC	Response Time	Breaking Capacity AC	Breaking Capacity DC	Melting I²t	Package	Size (mm)	Product Status	RoHS Status
BK/PCB-3	Eaton - Electronics Division	3 A	250 V	450 V	Fast Blow	50 A	4.4 kA	0.75	Radial, Box	8.89 x 4.67 x 8.76	Obsolete	Non-compliant
BK/PCB-3-R	Eaton - Electronics Division	3 A	250 V	450 V	Fast Blow	50 A	4.4 kA	0.75	Radial, Box	8.89 x 4.67 x 8.76	Active	ROHS3 Compliant
PCB-3-R	Eaton - Electronics Division	3 A	250 V	450 V	Fast Blow	50 A	4.4 kA	0.75	Radial, Box	8.89 x 4.67 x 8.76	Active	ROHS3 Compliant
BK/PCC-3-R	Eaton - Electronics Division	3 A	250 V	450 V	Fast Blow	50 A	4.4 kA	0.75	Radial, Box	8.89 x 4.67 x 8.76	Active	ROHS3 Compliant
BK/PCF-3-R	Eaton - Electronics Division	3 A	250 V	450 V	Fast Blow	50 A	4.4 kA	0.75	Radial, Box	8.89 x 4.67 x 8.76	Active	ROHS3 Compliant
BK/PCH-3-R	Eaton - Electronics Division	3 A	250 V	450 V	Fast Blow	50 A	4.4 kA	0.75	Radial, Box	8.89 x 4.67 x 8.76	Active	ROHS3 Compliant
PCC-3-R	Eaton - Electronics Division	3 A	250 V	450 V	Fast Blow	50 A	4.4 kA	0.75	Radial, Box	8.89 x 4.67 x 8.76	Active	ROHS3 Compliant
PCF-3-R	Eaton - Electronics Division	3 A	250 V	450 V	Fast Blow	50 A	4.4 kA	0.75	Radial, Box	8.89 x 4.67 x 8.76	Active	ROHS3 Compliant
PCH-3-R	Eaton - Electronics Division	3 A	250 V	450 V	Fast Blow	50 A	4.4 kA	0.75	Radial, Box	8.89 x 4.67 x 8.76	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: BK/PCB-3-R

BK/PCB-3-R is the direct equivalent to BK/PCB-3 with active product status. This part maintains identical electrical and mechanical specifications while offering ROHS3 compliance and REACH unaffected status. Inventory availability is 20,099 pieces, providing reliable supply continuity.

Secondary Recommendations: PCB-3-R, BK/PCC-3-R, BK/PCF-3-R, BK/PCH-3-R, PCC-3-R, PCF-3-R, PCH-3-R

All remaining substitute parts are parametrically equivalent to BK/PCB-3 and maintain active product status with ROHS3 compliance. Selection among these alternatives may be based on packaging requirements (bulk packaging available for all) and inventory availability:

BK/PCB-3-R: 20,099 pieces
BK/PCC-3-R: 2,551 pieces
BK/PCF-3-R: 811 pieces
BK/PCH-3-R: 1,690 pieces
PCB-3-R: 878 pieces
PCC-3-R: 931 pieces
PCF-3-R: 757 pieces
PCH-3-R: 942 pieces

All substitute parts carry CSA and UL approval certifications identical to the original BK/PCB-3 specification.

Frequently Asked Questions (FAQ)

Q: Can BK/PCB-3-R be used as a direct replacement for BK/PCB-3?

A: Yes. BK/PCB-3-R is electrically and mechanically identical to BK/PCB-3. Both parts share the same 3 A current rating, 250 V AC / 450 V DC voltage ratings, fast blow response, 50 A AC / 4.4 kA DC breaking capacity, and 0.350" L x 0.184" W x 0.345" H physical dimensions. The primary difference is product status: BK/PCB-3 is obsolete while BK/PCB-3-R is active with ROHS3 compliance.

Q: What is the difference between BK/PCB-3-R and PCB-3-R?

A: Both parts are parametrically equivalent with identical electrical and mechanical specifications. The designation difference reflects internal Eaton product line categorization. Both are active products with ROHS3 compliance and CSA/UL certification. Selection may be based on inventory availability or specific procurement requirements.

Q: Are all substitute parts certified by CSA and UL?

A: Yes. All substitute parts listed—BK/PCB-3-R, PCB-3-R, BK/PCC-3-R, BK/PCF-3-R, BK/PCH-3-R, PCC-3-R, PCF-3-R, and PCH-3-R—carry CSA and UL approval certifications matching the original BK/PCB-3 specification.

Q: What does ROHS3 compliance mean for these fuses?

A: ROHS3 compliance indicates that the substitute parts meet the Restriction of Hazardous Substances Directive requirements. The original BK/PCB-3 is listed as RoHS non-compliant, while all active substitute parts are ROHS3 compliant, making them suitable for applications requiring regulatory compliance with current environmental standards.

Q: Can I mix BK/PCB-3 and substitute parts in the same circuit board?

A: All substitute parts maintain identical electrical parameters (3 A, 250 V AC, 450 V DC, fast blow, 0.75 melting I²t) and mechanical dimensions (0.350" L x 0.184" W x 0.345" H). They are interchangeable in through-hole radial mounting applications. However, design documentation should be updated to reflect the active part number used.

Q: Which substitute part should I choose if multiple are available?

A: BK/PCB-3-R is the recommended primary choice due to highest inventory availability (20,099 pieces) and direct designation alignment with the original part. Alternative substitutes (PCB-3-R, BK/PCC-3-R, BK/PCF-3-R, BK/PCH-3-R, PCC-3-R, PCF-3-R, PCH-3-R) are functionally equivalent and may be selected based on specific procurement, packaging, or supply chain requirements.

Q: Are the physical dimensions identical across all substitute parts?

A: Yes. All substitute parts share the identical physical dimension specification of 0.350" L x 0.184" W x 0.345" H (8.89 mm x 4.67 mm x 8.76 mm) in radial, box package configuration. Through-hole mounting compatibility is maintained across all parts.

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