Circuit Breaker 203-2-1-62-103-4-2-1 Equivalent & Substitute Parts

Part Overview

The Sensata-Airpax 203-2-1-62-103-4-2-1 is a magnetic circuit breaker rated for 10A at 250V AC / 32V DC with rocker panel mount actuation and neon illumination. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent substitute parts is necessary for maintenance, repair, and legacy system support where original inventory is depleted or unavailable.

Substiute Parts

203-2-1-62-103-4-2-1

Sensata-AirpaxIn Stock: 682203-2-1-62-103-4-2-1 Datasheet

Current PartRFQ

203-2-1-62-103-4-1-1

Sensata Technologies – AirpaxIn Stock: 1194203-2-1-62-103-4-1-1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 203-2-1-62-103-4-2-1 is determined by strict equivalence across the following critical parameters:

• Current Rating: 10A (exact match required)
• Voltage Rating: 250V AC and 32V DC (both must be met or exceeded)
• Breaker Type: Magnetic (functional requirement)
• Mounting Type: Panel Mount (mechanical requirement)
• Actuator Type: Rocker (interface requirement)
• Number of Poles: 1 (circuit configuration)
• Illumination: Neon at 120V nominal (operational feature)
• Approval Agency: UL1077 certification (regulatory requirement)
• Base Product Number: 203-2-1-62 (platform compatibility)

The identified substitute maintains identical electrical and mechanical specifications, ensuring direct functional replacement without circuit redesign or mechanical modification.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 203-2-1-62-103-4-1-1 is a direct parametric equivalent to the main part number 203-2-1-62-103-4-2-1. Both components share identical electrical ratings, mechanical interfaces, and regulatory certifications. Selection between these parts should be based on availability and inventory status. Both parts carry "Not For New Designs" status, indicating they are legacy components suitable only for replacement and maintenance applications. RoHS compliance and UL1077 certification are maintained across both variants, ensuring regulatory continuity in existing installations.

Frequently Asked Questions (FAQ)

Q: Can the substitute part 203-2-1-62-103-4-1-1 be used as a direct replacement for 203-2-1-62-103-4-2-1?

A: Yes. Both parts are parametrically equivalent across all critical specifications: 10A current rating, 250V AC / 32V DC voltage ratings, magnetic breaker type, rocker actuation, panel mount configuration, neon illumination at 120V, and UL1077 certification. No circuit modification or mechanical adaptation is required.

Q: What is the difference between these two part numbers?

A: The provided data indicates both parts are functionally identical. The difference in part number suffix reflects internal manufacturer designation but does not affect electrical or mechanical performance.

Q: Are both parts suitable for new designs?

A: No. Both the main part and substitute are marked "Not For New Designs." These are legacy components intended for maintenance and repair of existing systems only.

Q: What certifications apply to these circuit breakers?

A: Both parts are certified to UL1077 and are RoHS compliant, meeting current regulatory requirements for electronic component manufacturing and environmental standards.

Q: Does the neon illumination voltage requirement affect substitution?

A: No. Both parts require 120V nominal illumination voltage. If your system provides this voltage, illumination will function identically on either part.

Q: Can these parts be used in applications requiring higher current ratings?

A: No. Both parts are rated for 10A maximum. Using them in higher current applications will result in nuisance trips or component failure.