MK2PN-I-DC110 Equivalent & Substitute Parts

Part Overview

The MK2PN-I-DC110 is a general purpose relay manufactured by Omron Automation and Safety, featuring a DPDT (2 Form C) contact configuration with 10A contact rating and 110VDC coil voltage. This socketable, 8-pin octal relay includes lighted and mechanical indicators for operational status monitoring. The product is currently obsolete, making equivalent substitute parts necessary for system maintenance, repair, and legacy equipment support where direct replacement is required.

Substiute Parts

MK2PN-I-DC110

Omron Automation and SafetyIn Stock: 722MK2PN-I-DC110 Datasheet

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KRPA-11DG-110

TE Connectivity Potter & Brumfield RelaysIn Stock: 1209KRPA-11DG-110 Datasheet

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KRPA-11DN-110

TE Connectivity Potter & Brumfield RelaysIn Stock: 938KRPA-11DN-110 Datasheet

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MT228115

TE Connectivity Potter & Brumfield RelaysIn Stock: 1007MT228115 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MK2PN-I-DC110 are identified based on the following critical parameters that must align for functional equivalence:

Primary Matching Criteria:

• Coil voltage: 110VDC (primary electrical requirement)
• Contact form: DPDT (2 Form C) (switching topology requirement)
• Contact rating: 10A minimum (current handling capacity)
• Mounting type: Socketable (mechanical interface requirement)
• Termination style: Plug In, 8 Pin (Octal) (socket compatibility requirement)
• Coil type: Non Latching (operational behavior requirement)

Secondary Compatibility Factors:

• Switching voltage rating (must meet or exceed application requirements)
• Operating temperature range (must encompass application environment)
• Contact material composition (affects reliability in specific environments)

The substitute parts listed below satisfy all primary matching criteria, ensuring direct functional replacement capability in applications designed for the MK2PN-I-DC110.

Parameter Comparison

Engineering Selection Recommendations

KRPA-11DG-110 and KRPA-11DN-110 (TE Connectivity Potter & Brumfield)

These relays provide the most direct functional equivalence to the MK2PN-I-DC110. Both maintain 110VDC coil voltage, DPDT contact configuration, 10A contact rating, and 8-pin octal socketable mounting. Both are currently in active product status with ROHS3 compliance (KRPA-11DG-110) or RoHS non-compliant status (KRPA-11DN-110). The KRPA-11DN-110 includes a lighted indicator feature matching the original design. Operating temperature range extends to -45°C ~ 70°C, providing broader environmental coverage than the original specification. Switching voltage rating of 240VAC is slightly lower than the original 250VAC specification but remains suitable for most legacy applications.

MT228115 (TE Connectivity Potter & Brumfield)

This relay shares the DPDT contact form, 10A rating, and 8-pin octal socketable mounting. However, the coil operates on 115VAC rather than 110VDC, representing a different electrical domain. This part is suitable only for applications where AC coil operation is acceptable or where the original system can accommodate AC-to-DC conversion. The product is obsolete, similar to the original MK2PN-I-DC110. Switching voltage rating of 400VAC exceeds the original specification. ROHS3 compliance status aligns with modern regulatory requirements.

Recommendation Priority:

For direct replacement in 110VDC systems, select KRPA-11DG-110 or KRPA-11DN-110 based on feature requirements (lighted indicator presence). For systems requiring AC coil operation or where voltage conversion is implemented, MT228115 provides an alternative. Verify coil resistance and must-operate voltage compatibility with existing circuit designs before final selection.

Frequently Asked Questions (FAQ)

Q: Can KRPA-11DG-110 or KRPA-11DN-110 directly replace MK2PN-I-DC110 in existing sockets?

A: Yes. Both relays share identical mounting type (socketable), termination style (8-pin octal plug-in), and contact configuration (DPDT). Physical and electrical socket compatibility is maintained. Verify that the circuit design accommodates the slightly lower coil current (11.5 mA vs. 15.1 mA) and higher coil resistance (10 kOhms vs. 7.3 kOhms).

Q: What is the key difference between KRPA-11DG-110 and KRPA-11DN-110?

A: Both relays are electrically identical with matching coil voltage, contact rating, and operating characteristics. The primary difference is the presence of a lighted indicator in KRPA-11DN-110, which matches the original MK2PN-I-DC110 feature set. KRPA-11DG-110 lacks this indicator feature. RoHS compliance status also differs: KRPA-11DG-110 is ROHS3 compliant, while KRPA-11DN-110 is RoHS non-compliant.

Q: Why is MT228115 listed as a substitute if it uses 115VAC instead of 110VDC?

A: MT228115 is listed based on the provided substitute data but operates in a different electrical domain (AC vs. DC). It is suitable only for applications where the system has been modified to accept AC coil operation or where AC-to-DC conversion is implemented. For standard 110VDC applications, KRPA-11DG-110 or KRPA-11DN-110 are the appropriate selections.

Q: Are there temperature range considerations when substituting these relays?

A: The original MK2PN-I-DC110 operates within -10°C ~ 40°C. Both KRPA-11DG-110 and KRPA-11DN-110 extend this range to -45°C ~ 70°C, providing enhanced environmental capability. MT228115 operates within -40°C ~ 50°C. Verify that the substitute relay's operating temperature range encompasses the actual application environment.

Q: What contact material differences exist, and do they affect substitution?

A: The original MK2PN-I-DC110 uses Silver (Ag) contact material. KRPA-11DG-110 and KRPA-11DN-110 use Silver Cadmium Oxide (AgCdO), while MT228115 uses Silver Nickel (AgNi). These materials have different electrical and environmental characteristics. For applications with specific contact material requirements (such as low-level signal switching or high-reliability environments), verify material compatibility before substitution.

Q: Is the lower switching voltage rating of KRPA-11DG-110 and KRPA-11DN-110 (240VAC vs. 250VAC) a concern?

A: The 240VAC maximum switching voltage of KRPA-11DG-110 and KRPA-11DN-110 is slightly lower than the original 250VAC specification. For applications switching at or below 240VAC, this presents no limitation. For applications requiring 250VAC switching capability, verify that actual circuit voltages remain within the substitute relay's rating, or consider MT228115 with its 400VAC maximum rating.

Q: What is the inventory status for these substitute parts?

A: KRPA-11DG-110 has 1149 pieces in stock, KRPA-11DN-110 has 856 pieces in stock, and MT228115 has 981 pieces in stock. All substitute parts are available in quantity for immediate procurement.