PCF-2-1/2-R Equivalent & Substitute Parts

Part Overview

The PCF-2-1/2-R is a 2.5 A board mount fuse rated for 250 V AC and 450 V DC operation, manufactured by Eaton - Electronics Division as part of the PC-Tron® series. This component is classified as obsolete, with 670 pieces currently in stock. Due to its obsolete status, equivalent substitute parts from active product lines are necessary for new designs and ongoing system maintenance. Substitute components maintain identical electrical and mechanical specifications while offering improved availability and active manufacturer support.

Key Parameters

Parameter	Value
Current Rating	2.5 A
Voltage Rating - AC	250 V
Voltage Rating - DC	450 V
Fuse Type	Board Mount (Cartridge Style Excluded)
Mounting Type	Through Hole
Response Time	Fast Blow
Package / Case	Radial, Box
Size / Dimension	0.350" L x 0.184" W x 0.345" H (8.89mm x 4.67mm x 8.76mm)
Breaking Capacity @ Rated Voltage	50A AC, 5.9kA DC
Melting I²t	0.3
Approval Agency	CSA, UL
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PCF-2-1/2-R is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

Current Rating: 2.5 A (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Voltage Rating - DC: 450 V (exact match required)
Response Time: Fast Blow (exact match required)

Mechanical Specifications:

Mounting Type: Through Hole (exact match required)
Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
Package / Case: Radial, Box (exact match required)
Physical Dimensions: 0.350" L x 0.184" W x 0.345" H (exact match required)

Compliance & Certification:

Approval Agency: CSA, UL (minimum requirement)
RoHS Status: ROHS3 Compliant (exact match required)

Substitute parts are grouped into two categories: Eaton - Electronics Division PC-Tron® series equivalents (active product status) and Littelfuse Inc. TE5® 808 series direct equivalents (alternative manufacturer with enhanced specifications).

Parameter Comparison

Part Number	Manufacturer	Product Status	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Response Time	Mounting Type	Breaking Capacity AC	Breaking Capacity DC	Melting I²t	Approval Agency	Inventory (Pcs)
PCF-2-1/2-R	Eaton - Electronics Division	Obsolete	2.5	250	450	Fast Blow	Through Hole	50A	5.9kA	0.3	CSA, UL	670
BK/PCB-2-1/2-R	Eaton - Electronics Division	Active	2.5	250	450	Fast Blow	Through Hole	50A	5.9kA	0.3	CSA, UL	10134
BK/PCC-2-1/2-R	Eaton - Electronics Division	Active	2.5	250	450	Fast Blow	Through Hole	50A	5.9kA	0.3	CSA, UL	4389
BK/PCH-2-1/2-R	Eaton - Electronics Division	Active	2.5	250	450	Fast Blow	Through Hole	50A	5.9kA	0.3	CSA, UL	953
PCB-2-1/2-R	Eaton - Electronics Division	Active	2.5	250	450	Fast Blow	Through Hole	50A	5.9kA	0.3	CSA, UL	1160
PCC-2-1/2-R	Eaton - Electronics Division	Active	2.5	250	450	Fast Blow	Through Hole	50A	5.9kA	0.3	CSA, UL	836
PCH-2-1/2-R	Eaton - Electronics Division	Active	2.5	250	450	Fast Blow	Through Hole	50A	5.9kA	0.3	CSA, UL	1149
80812500075	Littelfuse Inc.	Active	2.5	250	450	Fast Blow	Through Hole	100A	10kA	0.0898	cULus	893
80812500440	Littelfuse Inc.	Active	2.5	250	450	Fast Blow	Through Hole	100A	10kA	0.0898	cULus	743

Engineering Selection Recommendations

Eaton - Electronics Division PC-Tron® Series (Parametric Equivalents):

The following part numbers are direct parametric equivalents from Eaton's active product line: BK/PCB-2-1/2-R, BK/PCC-2-1/2-R, BK/PCH-2-1/2-R, PCB-2-1/2-R, PCC-2-1/2-R, and PCH-2-1/2-R. These components maintain identical electrical specifications, mechanical dimensions, and approval certifications (CSA, UL) as the obsolete PCF-2-1/2-R. Selection among these variants is determined by packaging requirements and inventory availability. BK/PCB-2-1/2-R offers the highest inventory level (10134 pieces) and is recommended for applications requiring immediate availability.

Littelfuse Inc. TE5® 808 Series (Direct Equivalents):

Part numbers 80812500075 and 80812500440 are direct manufacturer equivalents from Littelfuse Inc. These components meet all electrical and mechanical requirements with enhanced breaking capacity specifications (100A AC, 10kA DC versus 50A AC, 5.9kA DC) and improved melting I²t characteristics (0.0898 versus 0.3). Both parts carry cULus certification and are suitable for applications requiring higher fault current protection margins. Operating temperature range is specified as -40°C to 125°C.

Selection Criteria:

For applications requiring manufacturer continuity within the Eaton ecosystem, select from the PC-Tron® series equivalents. For applications benefiting from enhanced fault current protection and broader temperature operating range, select from the Littelfuse TE5® 808 series. All substitute parts are ROHS3 compliant and carry appropriate regulatory approvals for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can BK/PCB-2-1/2-R be used as a direct replacement for PCF-2-1/2-R?

A: Yes. BK/PCB-2-1/2-R is a parametric equivalent with identical electrical ratings (2.5 A, 250 V AC, 450 V DC), mechanical dimensions (0.350" L x 0.184" W x 0.345" H), mounting type (Through Hole), and approval certifications (CSA, UL). The primary difference is product status (Active versus Obsolete) and packaging designation (Bulk).

Q: What is the difference between the Eaton PC-Tron® variants (BK/PCB-2-1/2-R, BK/PCC-2-1/2-R, BK/PCH-2-1/2-R, PCB-2-1/2-R, PCC-2-1/2-R, PCH-2-1/2-R)?

A: All six Eaton variants are parametric equivalents with identical electrical and mechanical specifications. Differences are limited to packaging designation (Bulk versus Box) and internal product line classification. Selection is based on inventory availability and procurement requirements rather than technical performance.

Q: How do Littelfuse 80812500075 and 80812500440 differ from the Eaton equivalents?

A: Both Littelfuse parts maintain identical current ratings (2.5 A), voltage ratings (250 V AC, 450 V DC), and physical dimensions. Key differences include enhanced breaking capacity (100A AC, 10kA DC versus 50A AC, 5.9kA DC), improved melting I²t (0.0898 versus 0.3), specified operating temperature range (-40°C to 125°C), and cULus certification. These enhancements provide superior fault current protection without affecting normal operation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (Eaton PC-Tron® series and Littelfuse TE5® 808 series) are ROHS3 compliant.

Q: What approval certifications are required for substitution?

A: The PCF-2-1/2-R carries CSA and UL certifications. Eaton PC-Tron® equivalents maintain identical CSA and UL certifications. Littelfuse TE5® 808 parts carry cULus certification, which encompasses both UL and CSA standards. All substitute parts meet or exceed the original certification requirements.

Q: Can I use 80812500075 or 80812500440 in a design originally specified for PCF-2-1/2-R?

A: Yes. Both Littelfuse parts are direct equivalents with identical electrical and mechanical specifications. The enhanced breaking capacity and improved melting I²t characteristics provide additional protection margins without affecting circuit operation. Regulatory certifications (cULus) are equivalent to or exceed the original CSA and UL requirements.

Q: What is the significance of the melting I²t parameter?

A: Melting I²t defines the thermal energy required to melt the fuse element. The PCF-2-1/2-R and Eaton equivalents specify 0.3, while Littelfuse parts specify 0.0898. Lower melting I²t values indicate faster response to overcurrent conditions. Littelfuse parts provide faster protection without affecting normal circuit operation at rated current.

Q: Are there any dimensional differences between substitute parts?

A: Eaton PC-Tron® equivalents maintain identical dimensions (0.350" L x 0.184" W x 0.345" H). Littelfuse TE5® 808 parts specify 0.350" L x 0.183" W x 0.350" H, representing negligible variations (0.001" width difference, 0.005" height difference) that do not affect board mount compatibility or through-hole installation.

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