Equivalent & Substitute Parts for MK2P-S-AC12

Part Overview

The Omron MK2P-S-AC12 is a general purpose relay with DPDT (2 Form C) contact configuration, rated for 10A at 12VAC coil voltage. This socketable, 8-pin octal relay features a mechanical indicator and test button, designed for non-latching applications with switching capability up to 250VAC/250VDC. The MK2P-S-AC12 is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs requiring compatible functionality.

Substiute Parts

MK2P-S-AC12

Omron Automation and SafetyIn Stock: 685MK2P-S-AC12 Datasheet

Current PartRFQ

KRPA-11AG-12

TE Connectivity Potter & Brumfield RelaysIn Stock: 1118KRPA-11AG-12 Datasheet

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KRPA-11AG-120

TE Connectivity Potter & Brumfield RelaysIn Stock: 1446KRPA-11AG-120 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MK2P-S-AC12 is determined by the following critical parameters:

Primary Matching Criteria:

• Contact form: DPDT (2 Form C)
• Contact rating: 10A minimum
• Mounting type: Socketable
• Termination style: 8-pin octal plug-in
• Coil type: Non-latching
• Relay type: General purpose

Coil Voltage Consideration: The MK2P-S-AC12 operates at 12VAC. Substitute parts must match this coil voltage specification to ensure direct compatibility in existing circuits without modification.

Switching Voltage: The main part supports 250VAC/250VDC maximum switching voltage. Substitute parts must meet or exceed this specification to maintain circuit protection and operational safety.

Two substitute parts are identified:

1. KRPA-11AG-12 (TE Connectivity Potter & Brumfield): Matches 12VAC coil voltage, DPDT contact form, 10A rating, and 8-pin octal termination. Switching voltage rated at 240VAC maximum. Product status is obsolete.

2. KRPA-11AG-120 (TE Connectivity Potter & Brumfield): Differs in coil voltage (120VAC instead of 12VAC), making it unsuitable as a direct substitute without circuit redesign. Included for reference only.

Parameter Comparison

Engineering Selection Recommendations

KRPA-11AG-12 as Direct Substitute: The KRPA-11AG-12 is the appropriate substitute for the MK2P-S-AC12 in applications requiring identical coil voltage (12VAC). Both parts share matching contact form, current rating, mounting configuration, and termination style. The KRPA-11AG-12 is ROHS3 compliant and operates across an extended temperature range (-45°C to 55°C versus -10°C to 40°C), providing improved environmental tolerance. The switching voltage specification of 240VAC is slightly lower than the original 250VAC/250VDC rating; verify this meets application requirements. Both parts are obsolete; inventory availability should be confirmed before design commitment.

KRPA-11AG-120 Not Recommended for Direct Substitution: The KRPA-11AG-120 operates at 120VAC coil voltage and is not a direct substitute for the 12VAC MK2P-S-AC12. This part is active in production status and ROHS3 compliant, but circuit redesign would be required to accommodate the different coil voltage. Consider this part only if system voltage conversion is feasible.

Frequently Asked Questions (FAQ)

Q: Can KRPA-11AG-12 replace MK2P-S-AC12 without circuit modification? A: Yes. Both relays operate at 12VAC coil voltage with identical DPDT contact form, 10A rating, and 8-pin octal termination. Direct socket substitution is possible.

Q: What is the difference in switching voltage between MK2P-S-AC12 and KRPA-11AG-12? A: The MK2P-S-AC12 supports 250VAC/250VDC maximum switching voltage, while KRPA-11AG-12 is rated for 240VAC maximum. Verify that your application does not exceed 240VAC switching requirements.

Q: Why is KRPA-11AG-120 listed if it cannot substitute directly? A: KRPA-11AG-120 is included for reference as an active production alternative from the same manufacturer family. It requires circuit redesign due to 120VAC coil voltage and is not suitable for direct socket replacement.

Q: Are there temperature operating range differences? A: Yes. MK2P-S-AC12 operates from -10°C to 40°C, while KRPA-11AG-12 operates from -45°C to 55°C. The substitute part provides extended environmental tolerance.

Q: What is the contact material difference? A: MK2P-S-AC12 uses silver (Ag) contacts, while KRPA-11AG-12 uses silver cadmium oxide (AgCdO). Both are suitable for general purpose relay applications; verify compatibility with your specific load characteristics.

Q: Are both parts obsolete? A: MK2P-S-AC12 and KRPA-11AG-12 are both classified as obsolete. Confirm inventory availability before committing to either part for new designs. KRPA-11AG-120 is active in production.