APL1-1-53-503 Equivalent & Substitute Parts

Part Overview

The APL1-1-53-503 is a single-pole circuit breaker with magnetic-hydraulic delay protection, rated for 50A at 277V AC and 65V DC. Manufactured by Sensata-Airpax, this lever-actuated panel mount breaker is classified as obsolete. Due to its discontinued status, identifying equivalent substitute parts is essential for system maintenance, repair, and component replacement in existing installations.

Substiute Parts

APL1-1-53-503

Sensata-AirpaxIn Stock: 1008APL1-1-53-503 Datasheet

Current PartRFQ

W91-X112-50

TE Connectivity Potter & Brumfield RelaysIn Stock: 1009W91-X112-50 Datasheet

MFR RecommendedRFQ

W91-X112-50

TE Connectivity Potter & Brumfield RelaysIn Stock: 1009W91-X112-50 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the APL1-1-53-503 is determined by the following critical parameters:

• Breaker Type: Magnetic (Hydraulic Delay) protection mechanism
• Current Rating: 50A
• Voltage Rating - AC: 277V minimum
• Mounting Type: Panel Mount
• Actuator Type: Lever
• Number of Poles: Single-pole (1P)

The substitute part W91-X112-50 meets all these core electrical and mechanical requirements, establishing functional equivalence for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The W91-X112-50 manufactured by TE Connectivity Potter & Brumfield Relays is the qualified substitute for APL1-1-53-503. This substitution is supported by:

• Identical electrical specifications: 50A current rating, 277V AC voltage rating, and magnetic-hydraulic delay protection
• Matching mechanical configuration: lever actuator, single-pole design, and panel mount form factor
• Active product status ensuring ongoing availability and supply chain continuity
• Equivalent export classification (EAR99) and tariff coding (HTSUS 8536.20.0020)

The primary distinction is the product lifecycle status: the original APL1-1-53-503 is obsolete, while W91-X112-50 remains in active production. This transition from Sensata-Airpax to TE Connectivity represents a standard industry substitution path for discontinued circuit breaker models.

Frequently Asked Questions (FAQ)

Q: Can W91-X112-50 directly replace APL1-1-53-503 in existing installations?

A: Yes. Both parts share identical current rating (50A), AC voltage rating (277V), breaker type (magnetic-hydraulic delay), mounting configuration (panel mount), and actuator design (lever). The mechanical and electrical interfaces are equivalent.

Q: What is the significance of the product status change from Obsolete to Active?

A: The APL1-1-53-503 is no longer manufactured by Sensata-Airpax. The W91-X112-50 is currently in production by TE Connectivity, ensuring availability for new orders and future replacements.

Q: Are there packaging differences between these parts?

A: The APL1-1-53-503 is listed with packaging designation "-" (not specified), while W91-X112-50 is supplied in Bulk packaging. Packaging format does not affect electrical or mechanical compatibility.

Q: Do compliance certifications differ between the two parts?

A: Both parts share the same ECCN classification (EAR99) and HTSUS tariff code (8536.20.0020). The W91-X112-50 is RoHS non-compliant, consistent with the design generation of this circuit breaker family.

Q: Is the DC voltage rating difference significant?

A: The APL1-1-53-503 specifies 65V DC rating, while W91-X112-50 does not list a separate DC rating in the provided data. For applications requiring DC operation, verify the W91-X112-50 DC capability against your system requirements before implementation.