PCH-1/2-R Equivalent & Substitute Parts Reference

Part Overview

The PCH-1/2-R is a board mount fuse manufactured by Eaton - Electronics Division, part of the PC-Tron® series. This component is a 500 mA, 250 V AC / 450 V DC fast blow fuse designed for through-hole radial mounting in a box package configuration. The part is currently active in production with 848 pieces in stock. Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative sourcing is required.

Substiute Parts

PCH-1/2-R

Eaton - Electronics DivisionIn Stock: 911PCH-1/2-R Datasheet

Current PartRFQ

BK/PCB-1/2-R

Eaton - Electronics DivisionIn Stock: 3814BK/PCB-1/2-R Datasheet

Parametric EquivalentRFQ

BK/PCC-1/2-R

Eaton - Electronics DivisionIn Stock: 3753BK/PCC-1/2-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCH-1/2-R are identified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Critical Electrical Parameters:

• Current Rating: 500 mA (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)
• Breaking Capacity @ Rated Voltage: 50A AC, 5.9kA DC (exact match required)
• Melting I²t: 0.006 (exact match required)

Critical Mechanical Parameters:

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

Compliance Parameters:

• Approval Agency: CSA, UL (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)
• Manufacturer: Eaton - Electronics Division (same manufacturer)
• Series: PC-Tron® (same series)

All substitute parts listed below meet these criteria without exception.

Parameter Comparison

Engineering Selection Recommendations

All three part numbers—PCH-1/2-R, BK/PCB-1/2-R, and BK/PCC-1/2-R—are functionally equivalent and interchangeable for applications requiring a 500 mA, 250 V AC / 450 V DC board mount fuse with fast blow response characteristics. Each part is manufactured by Eaton - Electronics Division, carries active product status, and holds CSA and UL approvals. All parts comply with ROHS3 requirements.

Selection between these part numbers should be based on inventory availability and procurement lead times. BK/PCB-1/2-R and BK/PCC-1/2-R currently maintain higher inventory levels (3783 and 3680 pieces respectively) compared to PCH-1/2-R (848 pieces), making them suitable alternatives when supply chain optimization is a consideration.

All parts are suitable for direct substitution in through-hole radial mounting applications where the specified electrical and mechanical parameters are required.

Frequently Asked Questions (FAQ)

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

A: Yes. BK/PCB-1/2-R is a parametric equivalent with identical electrical ratings (500 mA, 250 V AC, 450 V DC), response time (fast blow), breaking capacity, mechanical dimensions, and mounting configuration. Both parts are manufactured by Eaton - Electronics Division and hold the same approvals.

Q: Are there any differences in performance between PCH-1/2-R and BK/PCC-1/2-R?

A: No. BK/PCC-1/2-R matches all critical electrical and mechanical parameters of PCH-1/2-R, including current rating, voltage ratings, response time, breaking capacity, melting I²t value, physical dimensions, and compliance certifications.

Q: What determines whether a part can substitute for PCH-1/2-R?

A: Substitution eligibility is determined by exact equivalence in the following parameters: 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), fuse type (board mount, cartridge style excluded), mounting type (through hole), package configuration (radial, box), physical dimensions (0.350" L x 0.184" W x 0.345" H), and approval agencies (CSA, UL).

Q: Can these fuses be used in applications with different voltage ratings?

A: No. These fuses are rated for 250 V AC and 450 V DC. They must not be used in applications exceeding these voltage specifications.

Q: Are all three part numbers compliant with current environmental regulations?

A: Yes. PCH-1/2-R, BK/PCB-1/2-R, and BK/PCC-1/2-R are all ROHS3 compliant. BK/PCB-1/2-R and BK/PCC-1/2-R are additionally documented as REACH Unaffected.

Q: What is the significance of the "fast blow" response time?

A: Fast blow indicates the fuse will open quickly when current exceeds the rated 500 mA threshold. This characteristic is consistent across all three equivalent part numbers and is essential for applications requiring rapid circuit protection.

Q: Are these parts suitable for surface mount applications?

A: No. All three parts are through-hole mounted components with radial, box package configuration. They are not suitable for surface mount applications.