KA-11AY-120 Equivalent & Substitute Parts

Part Overview

The KA-11AY-120 is a general purpose relay manufactured by TE Connectivity Potter & Brumfield Relays. This DPDT (2 Form C) relay operates at 120VAC with a 5A contact rating and features chassis mount construction with solder lug termination. The product is classified as obsolete, necessitating identification of active equivalent alternatives for continued system support and procurement.

Substiute Parts

KA-11AY-120

TE Connectivity Potter & Brumfield RelaysIn Stock: 1264KA-11AY-120 Datasheet

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KRPA-11AY-120

TE Connectivity Potter & Brumfield RelaysIn Stock: 1165KRPA-11AY-120 Datasheet

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KU-11A31-120

TE Connectivity Potter & Brumfield RelaysIn Stock: 959KU-11A31-120 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the KA-11AY-120 are qualified based on electrical and mechanical parameter alignment. All substitute candidates maintain identical specifications for coil voltage (120VAC), contact form (DPDT), contact rating (5A), switching voltage (240VAC maximum), coil current (17.5 mA), coil resistance (2.25 kOhms), must operate voltage (102VAC), contact material (silver), coil insulation (Class B), and relay type (general purpose). Substitutes are differentiated by mounting type and termination style, which determine physical integration into existing circuit designs. The KRPA-11AY-120 provides socketable mounting with octal plug-in termination, while the KU-11A31-120 maintains chassis mount construction with quick connect termination. Both substitute parts carry active product status and ROHS3 compliance, supporting long-term availability and regulatory conformance.

Parameter Comparison

Engineering Selection Recommendations

The KA-11AY-120 is obsolete and requires substitution for new procurement and system support. Both KRPA-11AY-120 and KU-11A31-120 are active products with ROHS3 compliance and equivalent electrical performance.

KRPA-11AY-120 Selection Criteria: This substitute is appropriate for applications where socketable mounting and octal plug-in termination are compatible with existing circuit board or panel designs. The KRPA-11AY-120 operates across a reduced temperature range (-45°C to 55°C) compared to the original part. This substitute is suitable for standard industrial environments within the specified temperature limits.

KU-11A31-120 Selection Criteria: This substitute maintains chassis mount construction and operating temperature range (-45°C to 70°C) identical to the original KA-11AY-120. The KU-11A31-120 differs in termination style, utilizing quick connect 0.187" (4.7mm) terminals instead of solder lugs. This substitute is appropriate for applications requiring direct thermal and mechanical compatibility with the original design while accommodating quick connect termination methods.

Both substitutes maintain identical electrical specifications: 120VAC coil voltage, DPDT contact form, 5A contact rating, 240VAC maximum switching voltage, 17.5 mA coil current, 2.25 kOhms coil resistance, 102VAC must operate voltage, silver contact material, and Class B coil insulation. Selection between substitutes depends on mounting type and termination style requirements of the target application.

Frequently Asked Questions (FAQ)

Q: Can the KRPA-11AY-120 replace the KA-11AY-120 in all applications?

A: The KRPA-11AY-120 provides electrical equivalence but differs in mounting type (socketable versus chassis mount) and termination style (octal plug-in versus solder lug). Substitution is valid only when the target application accommodates socketable mounting and octal termination. Additionally, the KRPA-11AY-120 operates to 55°C maximum, compared to 70°C for the original part.

Q: Can the KU-11A31-120 replace the KA-11AY-120 in all applications?

A: The KU-11A31-120 maintains chassis mount construction and identical operating temperature range (-45°C to 70°C). Substitution requires compatibility with quick connect 0.187" (4.7mm) termination instead of solder lugs. Electrical specifications are fully equivalent.

Q: What are the key electrical parameters that must match for substitution?

A: Critical matching parameters are coil voltage (120VAC), contact form (DPDT), contact rating (5A), switching voltage (240VAC maximum), coil current (17.5 mA), coil resistance (2.25 kOhms), must operate voltage (102VAC), contact material (silver), and coil insulation (Class B). All substitute parts meet these requirements.

Q: Are there temperature range differences between the substitutes?

A: The KA-11AY-120 and KU-11A31-120 both operate from -45°C to 70°C. The KRPA-11AY-120 operates from -45°C to 55°C, representing a reduced upper temperature limit. Applications requiring operation above 55°C must use the KU-11A31-120.

Q: What is the primary difference between the two substitute parts?

A: The KRPA-11AY-120 is socketable with octal plug-in termination, while the KU-11A31-120 is chassis mount with quick connect termination. Both are electrically equivalent to the original part. Selection depends on the physical mounting and termination requirements of the target circuit design.

Q: Are all three parts RoHS compliant?

A: Yes, the KA-11AY-120, KRPA-11AY-120, and KU-11A31-120 are all ROHS3 compliant.

Q: What is the product status of each part?

A: The KA-11AY-120 is obsolete. Both KRPA-11AY-120 and KU-11A31-120 are active products with ongoing availability.