Weidmüller 7940116421 Circuit Breaker - Equivalent & Substitute Parts

Part Overview

The Weidmüller 7940116421 is a single-pole thermal magnetic circuit breaker rated for 300mA at 250V AC and 80V DC, designed for DIN rail mounting with push-to-reset actuation. This component is classified as Active product status with full compliance to CSA C22.2 No 235, UL1077, and VDE standards. Substitute parts are identified when inventory constraints, supply chain disruptions, or project requirements necessitate alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

7940116421

WeidmüllerIn Stock: 8337940116421 Datasheet

Current PartRFQ

7940102288

WeidmüllerIn Stock: 7877940102288 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Weidmüller 7940116421 is determined by strict equivalence across the following critical parameters:

• Current Rating: 300mA (exact match required)
• Voltage Rating AC: 250V (exact match required)
• Voltage Rating DC: 80V (exact match required)
• Breaker Type: Thermal Magnetic (exact match required)
• Mounting Type: DIN Rail (exact match required)
• Number of Poles: 1 (exact match required)
• Actuator Type: Push to Reset (exact match required)
• Approval Agencies: CSA C22.2 No 235, UL1077, VDE (exact match required)

Only parts meeting all specified parameters are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The Weidmüller 7940102288 is a direct parametric equivalent to the 7940116421. Both components are Active status products manufactured by Weidmüller within the CB4200 series and carry identical electrical ratings, mechanical specifications, and regulatory certifications. Selection between these parts is based on inventory availability and supply chain considerations rather than technical differentiation. Both parts maintain RoHS compliance and satisfy CSA C22.2 No 235, UL1077, and VDE approval requirements.

Frequently Asked Questions (FAQ)

Q: Can the 7940102288 be used as a direct replacement for the 7940116421?

A: Yes. Both parts are parametric equivalents with identical current ratings (300mA), voltage ratings (250V AC / 80V DC), breaker type (thermal magnetic), mounting configuration (DIN rail), pole count (1), and actuator type (push to reset). Regulatory certifications and RoHS compliance are identical.

Q: Are there any differences in packaging or physical dimensions between these parts?

A: Both parts are supplied in bulk packaging. No dimensional or physical differences are specified in the provided technical parameters.

Q: Do both parts carry the same regulatory approvals?

A: Yes. Both the 7940116421 and 7940102288 are certified to CSA C22.2 No 235, UL1077, and VDE standards.

Q: What is the inventory status for each part?

A: The 7940116421 has 785 pieces in stock. The 7940102288 has 753 pieces in stock. Both are listed as new original inventory.

Q: Are there any environmental or compliance differences between these substitutes?

A: No. Both parts are RoHS compliant, REACH unaffected, and classified under identical ECCN (EAR99) and HTSUS (8538.90.8120) codes.