104-PR3-3A Circuit Breaker Thermal Equivalent & Substitute Parts

Part Overview

The 104-PR3-3A is a thermal circuit breaker manufactured by E-T-A, rated for 3A at 240V AC and 48V DC with push-to-reset actuation. This single-pole through-hole component is designed for overcurrent protection in low-voltage applications. The part maintains Active product status with full compliance to international safety standards including CE, CSA C22.2 No 235, GB 17701, IEC 60934, and UL1077. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same series and specifications.

Substiute Parts

104-PR3-3A

E-T-AIn Stock: 1040104-PR3-3A Datasheet

Current PartRFQ

104-PR-3A

E-T-AIn Stock: 993104-PR-3A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 104-PR3-3A is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part 104-PR-3A maintains identical specifications for current rating (3A), AC voltage (240V), DC voltage (48V), breaker type (Thermal), actuator mechanism (Push to Reset), pole configuration (1), and mounting method (Through Hole). Both parts belong to the E-T-A 104 series and carry the same regulatory approvals. Substitution is valid only when all parameters listed in the Key Parameters table remain unchanged.

Parameter Comparison

Engineering Selection Recommendations

Both the 104-PR3-3A and 104-PR-3A are Active products with identical electrical ratings and mechanical configurations. Selection between these parts is based on availability and inventory status. The 104-PR3-3A maintains 974 pieces in stock, while the 104-PR-3A has 952 pieces available. Both parts carry full compliance to CE, CSA C22.2 No 235, GB 17701, IEC 60934, and UL1077 standards, with ROHS3 compliance and REACH unaffected status. Either part is suitable for direct substitution in applications requiring 3A thermal circuit protection at 240V AC or 48V DC with push-to-reset functionality.

Frequently Asked Questions (FAQ)

Q: Can the 104-PR-3A replace the 104-PR3-3A in existing designs? A: Yes. Both parts are electrically and mechanically equivalent with identical current ratings (3A), voltage ratings (240V AC, 48V DC), breaker type (Thermal), actuator mechanism (Push to Reset), and through-hole mounting. No design modifications are required.

Q: Are there differences in regulatory compliance between these parts? A: No. Both parts carry identical approvals: CE, CSA C22.2 No 235, GB 17701, IEC 60934, and UL1077. Both are ROHS3 compliant and REACH unaffected.

Q: What determines if a part can substitute for the 104-PR3-3A? A: Substitution requires equivalence across all parameters: 3A current rating, 240V AC voltage, 48V DC voltage, Thermal breaker type, Push to Reset actuation, single pole configuration, and through-hole mounting. Any deviation in these specifications disqualifies a part from substitution.

Q: Are packaging considerations relevant for substitution? A: Both parts are supplied in Bulk packaging. Packaging format does not affect electrical or mechanical compatibility for through-hole mounted components.