Equivalent & Substitute Parts for BK/PCB-1/2-SD

Part Overview

The BK/PCB-1/2-SD is a 500 mA, 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, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement requirements. The fuse features fast blow response characteristics and is approved by CSA and UL agencies. Equivalent active alternatives are available within the PC-Tron® product family, all meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Current Rating	500 mA
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	50A AC, 5.9kA DC
Melting I²t	0.006
Size / Dimension	0.350" L x 0.184" W x 0.345" H (8.89mm x 4.67mm x 8.76mm)
Approval Agency	CSA, UL
Series	PC-Tron®

Substitute Part Grouping Explanation

Substitution of BK/PCB-1/2-SD is based on strict equivalence across all critical electrical and mechanical parameters. All substitute parts maintain identical specifications for current rating (500 mA), AC voltage rating (250 V), DC voltage rating (450 V), response time (Fast Blow), breaking capacity (50A AC, 5.9kA DC), melting I²t (0.006), physical dimensions (0.350" L x 0.184" W x 0.345" H), mounting type (Through Hole), fuse type (Board Mount), package configuration (Radial, Box), and approval certifications (CSA, UL).

The primary distinction between the obsolete BK/PCB-1/2-SD and its active equivalents is product status and packaging format. The main part is supplied in box packaging and is obsolete. All substitute parts are active and available in bulk packaging. Additionally, substitute parts comply with RoHS3 and REACH requirements, whereas the original part is RoHS non-compliant.

Parameter Comparison

Part Number	Manufacturer	Product Status	Current Rating	Voltage AC	Voltage DC	Response Time	Breaking Capacity AC	Breaking Capacity DC	Melting I²t	RoHS Status	Inventory (Pcs)
BK/PCB-1/2-SD	Eaton - Electronics Division	Obsolete	500 mA	250 V	450 V	Fast Blow	50A	5.9kA	0.006	RoHS non-compliant	956
BK/PCB-1/2-R	Eaton - Electronics Division	Active	500 mA	250 V	450 V	Fast Blow	50A	5.9kA	0.006	ROHS3 Compliant	3783
BK/PCC-1/2-R	Eaton - Electronics Division	Active	500 mA	250 V	450 V	Fast Blow	50A	5.9kA	0.006	ROHS3 Compliant	3680
BK/PCF-1/2-R	Eaton - Electronics Division	Active	500 mA	250 V	450 V	Fast Blow	50A	5.9kA	0.006	ROHS3 Compliant	890
BK/PCH-1/2-R	Eaton - Electronics Division	Active	500 mA	250 V	450 V	Fast Blow	50A	5.9kA	0.006	ROHS3 Compliant	1110
PCB-1/2-R	Eaton - Electronics Division	Active	500 mA	250 V	450 V	Fast Blow	50A	5.9kA	0.006	ROHS3 Compliant	1081
PCC-1/2-R	Eaton - Electronics Division	Active	500 mA	250 V	450 V	Fast Blow	50A	5.9kA	0.006	ROHS3 Compliant	782
PCF-1/2-R	Eaton - Electronics Division	Active	500 mA	250 V	450 V	Fast Blow	50A	5.9kA	0.006	ROHS3 Compliant	775
PCH-1/2-R	Eaton - Electronics Division	Active	500 mA	250 V	450 V	Fast Blow	50A	5.9kA	0.006	ROHS3 Compliant	848

Engineering Selection Recommendations

For applications currently using BK/PCB-1/2-SD, direct substitution with BK/PCB-1/2-R is the primary recommendation. This part maintains identical electrical and mechanical specifications while offering active product status and improved regulatory compliance (ROHS3 Compliant, REACH Unaffected). BK/PCB-1/2-R is available in bulk packaging with the highest inventory level (3783 pcs).

Alternative active equivalents within the PC-Tron® series—BK/PCC-1/2-R, BK/PCF-1/2-R, and BK/PCH-1/2-R—provide identical parametric performance and are suitable for direct substitution. These variants differ only in internal construction characteristics not specified in the provided parameters.

For applications without packaging format constraints, the non-prefixed variants PCB-1/2-R, PCC-1/2-R, PCF-1/2-R, and PCH-1/2-R are functionally equivalent and available in bulk packaging. All substitute parts carry CSA and UL approvals consistent with the original part.

Selection among active equivalents should be based on procurement availability, lead time, and internal design documentation requirements. All listed substitutes meet identical electrical performance criteria and physical mounting requirements.

Frequently Asked Questions (FAQ)

Q: Can BK/PCB-1/2-R directly replace BK/PCB-1/2-SD in existing designs?

A: Yes. BK/PCB-1/2-R is a direct equivalent with identical electrical ratings (500 mA, 250 V AC, 450 V DC), response time (Fast Blow), breaking capacity (50A AC, 5.9kA DC), physical dimensions (0.350" L x 0.184" W x 0.345" H), and mounting configuration (Through Hole, Radial, Box). The primary differences are product status (Active vs. Obsolete) and regulatory compliance (ROHS3 Compliant vs. RoHS non-compliant).

Q: What is the difference between BK/PCB-1/2-R, BK/PCC-1/2-R, BK/PCF-1/2-R, and BK/PCH-1/2-R?

A: All four parts share identical electrical and mechanical specifications. The letter designation (B, C, F, H) indicates internal construction variants within the PC-Tron® series. From an electrical and physical compatibility standpoint, they are fully interchangeable.

Q: Are the non-prefixed variants (PCB-1/2-R, PCC-1/2-R, PCF-1/2-R, PCH-1/2-R) equivalent to the BK-prefixed versions?

A: Yes. The non-prefixed variants maintain identical electrical ratings, response characteristics, breaking capacity, physical dimensions, and mounting type. The prefix designation does not affect functional equivalence for substitution purposes.

Q: What certifications apply to all substitute parts?

A: All substitute parts carry CSA and UL approvals. Additionally, all active equivalents comply with ROHS3 and REACH requirements, providing enhanced regulatory compliance compared to the obsolete BK/PCB-1/2-SD.

Q: Is there a preferred substitute part among the available options?

A: BK/PCB-1/2-R is the recommended primary substitute due to highest inventory availability (3783 pcs) and direct part number correspondence to the obsolete BK/PCB-1/2-SD. Alternative equivalents (BK/PCC-1/2-R, BK/PCF-1/2-R, BK/PCH-1/2-R) are equally suitable from an electrical and mechanical standpoint.

Q: Can these fuses be used in both AC and DC applications?

A: Yes. All parts are rated for 250 V AC and 450 V DC operation with Fast Blow response time and identical breaking capacity specifications for both AC (50A) and DC (5.9kA) conditions.

Q: What is the significance of the Melting I²t value of 0.006?

A: The Melting I²t of 0.006 is a thermal characteristic that defines the fuse's response to overcurrent conditions. All substitute parts maintain this identical value, ensuring consistent thermal protection performance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message