RPM31BD Equivalent & Substitute Parts

Part Overview

The RPM31BD is a Harmony series general purpose relay manufactured by Schneider Electric. This socketable, plug-in relay features a 3PDT (3 Form C) contact configuration with a 24VDC coil and 15 A contact rating. The part is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified to provide procurement flexibility, support supply chain continuity, and accommodate specific packaging or inventory requirements while maintaining identical electrical and mechanical performance characteristics.

Substiute Parts

RPM31BD

Schneider ElectricIn Stock: 860RPM31BD Datasheet

Current PartRFQ

RPM33BD

Schneider ElectricIn Stock: 1221RPM33BD Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RPM31BD are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

• Manufacturer: Schneider Electric
• Series: Harmony
• Relay Type: General Purpose
• Contact Form: 3PDT (3 Form C)
• Coil Voltage: 24VDC
• Contact Rating (Current): 15 A
• Switching Voltage: 250VAC, 28VDC - Max
• Coil Current: 75 mA
• Coil Type: Non Latching
• Contact Material: Silver Nickel (AgNi)
• Coil Resistance: 320 Ohms
• Operating Temperature Range: -40°C ~ 55°C
• Must Operate Voltage: 19.2 VDC
• Must Release Voltage: 2.4 VDC
• Operate Time: 20 ms
• Release Time: 20 ms
• Mounting Type: Socketable
• Termination Style: Plug In
• RoHS Status: ROHS3 Compliant

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes. Variations in packaging configuration do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both RPM31BD and RPM33BD are Active product status components manufactured by Schneider Electric within the Harmony relay series. Both parts are RoHS3 compliant and carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Selection between RPM31BD and RPM33BD is determined by packaging requirements and inventory availability. The RPM31BD is supplied in standard packaging configuration, while RPM33BD is supplied in Box packaging. From an electrical and mechanical standpoint, both parts are functionally identical and interchangeable in circuit applications.

Compliance certifications (RoHS3, EAR99 ECCN classification, HTSUS code 8536.41.0050) are equivalent across both part numbers, supporting their use in regulated applications without additional qualification.

Frequently Asked Questions (FAQ)

Q: Are RPM31BD and RPM33BD electrically identical?

A: Yes. Both parts share identical electrical specifications including 24VDC coil voltage, 15 A contact rating, 3PDT contact form, 320 Ohm coil resistance, and all timing and voltage threshold parameters.

Q: What is the difference between RPM31BD and RPM33BD?

A: The primary difference is packaging configuration. RPM31BD uses standard packaging, while RPM33BD is supplied in Box packaging. All electrical and mechanical characteristics are identical.

Q: Can RPM33BD replace RPM31BD in an existing circuit?

A: Yes. RPM33BD is a direct parametric equivalent and can replace RPM31BD without circuit modification or re-qualification.

Q: Are both parts RoHS compliant?

A: Yes. Both RPM31BD and RPM33BD are RoHS3 compliant.

Q: What is the moisture sensitivity level for these relays?

A: Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Do these relays require a socket for installation?

A: Yes. Both RPM31BD and RPM33BD are socketable relays with plug-in termination style and must be installed in a compatible relay socket.

Q: What is the operating temperature range for these relays?

A: Both parts operate across the temperature range of -40°C to 55°C.

Q: Can these relays be used in 250VAC applications?

A: Yes. Both relays support switching voltage up to 250VAC maximum, in addition to 28VDC maximum.