MK2P-S DC125 Equivalent & Substitute Parts

Part Overview

The MK2P-S DC125 is a general purpose relay manufactured by Omron Automation and Safety, featuring a DPDT (2 Form C) contact configuration with 10A contact rating and 125VDC coil voltage. This socketable, 8-pin octal relay includes mechanical indicator and test button features, designed for general purpose switching applications.

The MK2P-S DC125 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system functionality, ensure continued availability for maintenance and replacement, and support long-term product support strategies where original components are no longer in production.

Substiute Parts

MK2P-S DC125

Omron Automation and SafetyIn Stock: 925MK2P-S DC125 Datasheet

Current PartRFQ

KRPA-11DG-125

TE Connectivity Potter & Brumfield RelaysIn Stock: 1416KRPA-11DG-125 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MK2P-S DC125 is based on the following critical parameters that must match or exceed the original specification:

Essential Matching Parameters:

• Contact form: DPDT (2 Form C)
• Contact rating: 10 A minimum
• Coil voltage: 125VDC
• Termination style: Plug In, 8 Pin (Octal)
• Mounting type: Socketable
• Coil type: Non Latching

The KRPA-11DG-125 manufactured by TE Connectivity Potter & Brumfield Relays satisfies all essential matching parameters. Both relays share identical contact configuration, current rating, coil voltage, and octal socketable termination, enabling direct functional substitution in applications requiring general purpose DPDT switching at 125VDC.

Parameter Comparison

Engineering Selection Recommendations

The KRPA-11DG-125 is the qualified substitute for the obsolete MK2P-S DC125 based on the following engineering criteria:

Functional Compatibility: Both relays provide identical DPDT contact configuration, 10A contact rating, 125VDC coil voltage, and 8-pin octal socketable termination. Direct socket replacement is feasible without circuit redesign.

Product Status: The MK2P-S DC125 is obsolete with no continued manufacturing. The KRPA-11DG-125 is active in production, ensuring long-term availability for replacement and maintenance applications.

Compliance Considerations: The MK2P-S DC125 is REACH Unaffected. The KRPA-11DG-125 is REACH Affected and RoHS non-compliant. Applications subject to REACH or RoHS requirements must evaluate regulatory implications before substitution.

Performance Characteristics: The KRPA-11DG-125 operates across a wider temperature range (-45°C to 70°C versus -10°C to 40°C) and requires lower coil current (9.6 mA versus 12 mA), offering improved efficiency in temperature-variable environments. The AgCdO contact material in the KRPA-11DG-125 provides enhanced arc suppression compared to silver contacts.

Application Constraints: The KRPA-11DG-125 maximum AC switching voltage is 240VAC, which is lower than the MK2P-S DC125 specification of 250VAC. Applications requiring 250VAC switching must confirm compatibility with the 240VAC rating.

Frequently Asked Questions (FAQ)

Q: Can the KRPA-11DG-125 directly replace the MK2P-S DC125 in existing sockets?

A: Yes. Both relays share identical 8-pin octal socketable termination and DPDT contact configuration. Physical and electrical socket compatibility is confirmed. No socket modification is required.

Q: What are the key differences between these two relays?

A: The primary differences are contact material (silver versus silver cadmium oxide), maximum AC switching voltage (240VAC versus 250VAC), operating temperature range (-45°C to 70°C versus -10°C to 40°C), and coil current draw (9.6 mA versus 12 mA). The KRPA-11DG-125 is in active production while the MK2P-S DC125 is obsolete.

Q: Are there compliance or regulatory differences between these parts?

A: Yes. The MK2P-S DC125 is REACH Unaffected. The KRPA-11DG-125 is REACH Affected and RoHS non-compliant. Applications subject to REACH or RoHS regulations must evaluate substitution against applicable requirements.

Q: Does the lower coil current of the KRPA-11DG-125 affect circuit design?

A: The KRPA-11DG-125 requires 9.6 mA coil current compared to 12 mA for the MK2P-S DC125. This lower current draw reduces power consumption and heat generation. Existing drive circuits designed for 12 mA will operate the KRPA-11DG-125 within specification without modification.

Q: What is the significance of the different contact materials?

A: The MK2P-S DC125 uses silver (Ag) contacts. The KRPA-11DG-125 uses silver cadmium oxide (AgCdO) contacts. AgCdO provides superior arc suppression and contact erosion resistance in high-current or high-frequency switching applications. Both materials are suitable for general purpose relay applications.

Q: Is the KRPA-11DG-125 available in the same packaging as the MK2P-S DC125?

A: The KRPA-11DG-125 is supplied in tray packaging. Original packaging information for the MK2P-S DC125 is not specified in available data. Confirm packaging requirements for your procurement and assembly processes.

Q: Can the KRPA-11DG-125 operate reliably at the full 250VAC switching voltage specified for the MK2P-S DC125?

A: The KRPA-11DG-125 is rated for 240VAC maximum switching voltage. Applications requiring 250VAC switching should confirm that 240VAC rating is acceptable for the intended use case. DC switching voltage rating for the KRPA-11DG-125 is not specified in available data.