104-PR2-3A Circuit Breaker Thermal Equivalent & Substitute Parts

Part Overview

The 104-PR2-3A 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 1084 units currently in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product series, ensuring functional interchangeability without design modification.

Substiute Parts

104-PR2-3A

E-T-AIn Stock: 1153104-PR2-3A Datasheet

Current PartRFQ

104-PR-3A

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 104-PR-3A qualifies as a parametric equivalent to the 104-PR2-3A based on identical electrical and mechanical specifications. Substitution is valid when the following parameters match exactly:

• Current Rating: 3A
• Voltage Rating - AC: 240V
• Voltage Rating - DC: 48V
• Breaker Type: Thermal
• Actuator Type: Push to Reset
• Mounting Type: Through Hole
• Number of Poles: 1
• Series: 104
• Manufacturer: E-T-A

Both parts share identical approval certifications (CE, CSA C22.2 No 235, GB 17701, IEC 60934, UL1077) and RoHS3 compliance status, confirming functional and regulatory equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both the 104-PR2-3A and 104-PR-3A are Active products with identical electrical ratings, mechanical configurations, and regulatory certifications. Selection between these parts is determined by availability and supply chain requirements. The 104-PR2-3A maintains higher inventory (1084 units) compared to the 104-PR-3A (952 units). Both parts satisfy CE, CSA C22.2 No 235, GB 17701, IEC 60934, and UL1077 compliance requirements. ROHS3 compliance and REACH Unaffected status are maintained across both variants. Direct substitution is valid without circuit redesign or performance impact.

Frequently Asked Questions (FAQ)

Q: Can the 104-PR-3A replace the 104-PR2-3A in existing designs?

A: Yes. Both parts are identical in current rating (3A), voltage ratings (240V AC / 48V DC), breaker type (thermal), actuator mechanism (push to reset), mounting configuration (through hole), and pole count (1). All regulatory certifications and compliance statuses match.

Q: Are there any differences in approval certifications between these parts?

A: No. Both parts carry identical approvals: CE, CSA C22.2 No 235, GB 17701, IEC 60934, and UL1077. RoHS3 compliance and REACH Unaffected status are equivalent.

Q: What is the primary reason to consider the substitute part?

A: Inventory availability. The 104-PR-3A provides an alternative source when the 104-PR2-3A stock is depleted, with 952 units currently available versus 1084 units of the main part number.

Q: Do these parts require different PCB footprints or mounting procedures?

A: No. Both parts use identical through-hole mounting configuration and are mechanically interchangeable without layout modifications.

Q: Are both parts currently in production?

A: Yes. Both the 104-PR2-3A and 104-PR-3A maintain Active product status, confirming ongoing manufacturing and support.