RM303012 General Purpose Relay 3PDT 10A 12VDC Equivalent & Substitute Parts

Part Overview

The RM303012 is a general purpose relay manufactured by TE Connectivity Potter & Brumfield Relays, featuring a 3PDT (3 Form C) contact configuration with a 12VDC coil and 10A contact rating. This relay is designed for chassis mount applications with quick connect termination. The RM303012 is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing system maintenance and new design implementations where this relay type is required.

Substiute Parts

RM303012

TE Connectivity Potter & Brumfield RelaysIn Stock: 987RM303012 Datasheet

Current PartRFQ

MJN3CF-DC12

Omron Automation and SafetyIn Stock: 815MJN3CF-DC12 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RM303012 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Coil Voltage: 12VDC
• Contact Form: 3PDT (3 Form C)
• Contact Rating (Current): 10 A
• Mounting Type: Chassis Mount
• Termination Style: Quick Connect - 0.187" (4.7mm)
• Coil Type: Non Latching
• Must Operate Voltage: 9 VDC minimum

Allowable Variation Parameters:

• Operating Temperature Range: Substitute must cover or exceed the minimum operating range
• Switching Voltage: Substitute may exceed the maximum switching voltage specification
• Coil Current: Minor variations acceptable within normal manufacturing tolerances
• Operate/Release Time: Variations acceptable provided switching characteristics remain within general purpose relay specifications
• Contact Material: Variations acceptable (Silver Cadmium Oxide to Silver Alloy)
• Product Status: Active status preferred for ongoing availability

The MJN3CF-DC12 meets all mandatory matching parameters and qualifies as a direct substitute for the RM303012.

Parameter Comparison

Engineering Selection Recommendations

The MJN3CF-DC12 manufactured by Omron Automation and Safety is a qualified substitute for the RM303012. Selection of the MJN3CF-DC12 is supported by the following factors:

Functional Equivalence: All mandatory electrical and mechanical parameters match exactly, including coil voltage, contact configuration, current rating, mounting type, and termination style.

Product Status Advantage: The MJN3CF-DC12 maintains active product status, ensuring continued availability and supply chain reliability compared to the obsolete RM303012.

Compliance and Certification: Both parts share identical ECCN (EAR99) and HTSUS (8536.41.0050) classifications. The MJN3CF-DC12 carries RoHS Compliant certification, providing additional environmental compliance assurance.

Performance Enhancement: The MJN3CF-DC12 provides extended operating temperature range (-45°C to 70°C versus -45°C to 60°C) and higher maximum switching voltage capability (600VAC/28VDC versus 440VAC), offering improved performance margins without compromising compatibility.

Moisture Sensitivity: Both parts share identical MSL rating of 1 (Unlimited), indicating equivalent moisture handling characteristics.

Frequently Asked Questions (FAQ)

Q: Can the MJN3CF-DC12 be used as a direct replacement for the RM303012 in existing applications?

A: Yes. The MJN3CF-DC12 meets all mandatory electrical and mechanical specifications for direct substitution. Identical coil voltage, contact configuration, current rating, mounting type, and termination style ensure functional compatibility in existing circuit designs and mechanical assemblies.

Q: What are the differences in coil current between these relays?

A: The RM303012 draws 109 mA while the MJN3CF-DC12 draws 100 mA. This 9 mA difference represents a compatible variation within normal manufacturing tolerances and does not affect circuit design or power supply requirements for general purpose relay applications.

Q: Does the longer operate time of the MJN3CF-DC12 (20 ms versus 15 ms) affect system performance?

A: The 5 ms difference in operate time is a compatible variation for general purpose relay applications. Both relays remain within typical switching time ranges for this relay category. Applications with critical timing requirements should evaluate specific system performance needs.

Q: Are there any compliance or certification differences between these parts?

A: Both parts share identical ECCN and HTSUS classifications. The MJN3CF-DC12 carries RoHS Compliant certification, providing additional environmental compliance assurance. Both parts maintain MSL rating of 1 (Unlimited).

Q: What is the significance of the extended temperature range on the MJN3CF-DC12?

A: The MJN3CF-DC12 operates to 70°C maximum versus 60°C for the RM303012. This extended range provides additional thermal margin for applications operating in elevated ambient conditions, though both relays cover the standard -45°C to 60°C industrial temperature range.

Q: Are the quick connect terminations identical between these relays?

A: Yes. Both relays use identical Quick Connect - 0.187" (4.7mm) termination style, ensuring mechanical and electrical compatibility with existing connector systems and wiring harnesses.

Q: What is the contact material difference and does it affect performance?

A: The RM303012 uses Silver Cadmium Oxide (AgCdO) while the MJN3CF-DC12 uses Silver Alloy. Both materials are standard for general purpose relay contact applications and provide equivalent performance for 10A switching at the specified voltage levels.