Phoenix Contact REL-MR-60DC/21/MS General Purpose Relay SPDT Equivalent & Substitute Parts

Part Overview

The Phoenix Contact REL-MR-60DC/21/MS is a general purpose relay with SPDT (1 Form C) contact configuration, designed for 60VDC coil operation in through-hole mounting applications. This relay is classified as Active product status and is suitable for industrial control circuits requiring reliable switching at 6A contact rating. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory optimization, or supply chain continuity while maintaining identical functional performance in the target application.

Substiute Parts

2909643

Phoenix ContactIn Stock: 10052909643 Datasheet

Current PartRFQ

2961118

Phoenix ContactIn Stock: 157202961118 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Phoenix Contact REL-MR-60DC/21/MS are identified based on strict electrical and mechanical parameter equivalence. The substitution criteria are defined by the following key parameters:

Electrical Parameters:

• Coil voltage: 60VDC
• Contact form: SPDT (1 Form C)
• Contact rating: 6 A
• Switching voltage: 250VAC, 250VDC maximum
• Coil current: 3 mA
• Coil resistance: 20.5 kOhms
• Coil type: Non Latching

Mechanical Parameters:

• Mounting type: Through Hole
• Termination style: PC Pin
• Contact material: Silver Tin Oxide (AgSnO)

Performance Parameters:

• Operate time: 5 ms
• Release time: 2.5 ms
• Operating temperature range: -40°C ~ 85°C

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes. No parameter deviation is permitted for substitution classification.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: REL-MR-60DC/21/MS (2909643)

The REL-MR-60DC/21/MS maintains Active product status and is available in bulk packaging with 986 pieces in current inventory. This part is classified under ECCN EAR99 and HTSUS 8536.41.0020.

Substitute Part: 2961118

Phoenix Contact part number 2961118 is a parametric equivalent offering identical electrical, mechanical, and performance characteristics. This substitute is also Active product status with significantly higher inventory availability (15,611 pieces). The substitute part carries additional compliance certifications: RoHS3 Compliant, REACH Unaffected status, and Moisture Sensitivity Level (MSL) 1 (Unlimited). Both parts share identical ECCN and HTSUS classifications.

Selection between the primary part and substitute should be based on inventory availability, supply chain lead times, and compliance documentation requirements specific to the end application. Both parts are functionally interchangeable in circuits designed for the REL-MR series 60VDC SPDT relay specification.

Frequently Asked Questions (FAQ)

Q: Can part number 2961118 be used as a direct replacement for 2909643 in existing designs?

A: Yes. Part 2961118 is a parametric equivalent with identical coil voltage (60VDC), contact form (SPDT), current rating (6A), switching voltage (250VAC/250VDC), coil current (3mA), timing characteristics (5ms operate, 2.5ms release), and operating temperature range (-40°C to 85°C). Both parts use identical mounting (through-hole), termination (PC pin), and contact material (Silver Tin Oxide). No circuit modifications are required.

Q: What are the key parameters that define substitution eligibility for this relay?

A: Substitution eligibility is strictly determined by: coil voltage (60VDC), contact configuration (SPDT 1 Form C), contact current rating (6A), switching voltage limits (250VAC/250VDC maximum), coil current (3mA), coil resistance (20.5kOhms), non-latching coil type, through-hole mounting, PC pin termination, Silver Tin Oxide contact material, and timing specifications (5ms operate/2.5ms release). Any deviation in these parameters disqualifies a part from substitution classification.

Q: Are there compliance or certification differences between the primary part and substitute?

A: The substitute part 2961118 includes additional compliance documentation: RoHS3 Compliant certification, REACH Unaffected status, and Moisture Sensitivity Level (MSL) 1 designation. Both parts share identical ECCN (EAR99) and HTSUS (8536.41.0020) classifications. Applications requiring specific compliance certifications should reference the substitute part documentation.

Q: What is the inventory status difference between these parts?

A: The primary part 2909643 has 986 pieces available in bulk packaging. The substitute part 2961118 has 15,611 pieces available in bulk packaging. Higher inventory availability for the substitute may provide supply chain advantages for high-volume applications or extended lead-time scenarios.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the primary part and substitute operate across the identical temperature range of -40°C to 85°C, ensuring equivalent thermal performance in industrial control applications.