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2909642
Power Relay, SPDT, 24 VDC, 3 A, REL-MR Series, Through Hole
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: PHOENIX CONTACT
- Product type: Power Relays
- SVHC: No SVHC (04-Feb-2026)
- Coil Type: -
- Coil Voltage: 24VDC
- Product Range: REL-MR Series
- Relay Mounting: Through Hole
- Coil Resistance: 3.39kohm
- Contact Current: 3A
- Relay Terminals: Solder
- Contact Material: Silver Tin Oxide
- Contact Voltage VAC: 250V
- Contact Voltage VDC: 250V
- Contact Configuration: SPDT
| Delivery and price | |
|---|---|
| Units per pack | 50 |
| Price | 7.6 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
https://www.phoenixcontact.com/us/products/2909642 ## Single relay - REL-MR- 24DC/21/MS - 2909642 Please be informed that the data shown in this PDF Document is generated from our Online Catalog. Please find the complete data in the user's documentation. Our General Terms of Use for Downloads are valid (http://phoenixcontact.com/download) ~~=~~ Plug-in miniature power relay, with power contact, 1 changeover contact, manual operation, 24 V DC input voltage Key Commercial Data ~~a~~ Packing unit 1 GTIN 4°055626°377674 ~~Pe LL a~~ GTIN 4055626377674 ~~a~~ Custom tariff number 85364190 ## Technical data ## Dimensions |Width|5 mm| |---|---| |Height|28 mm| |Depth|16 mm| |Ambient conditions|| |Ambient temperature (operation)|-40 °C ... 85 °C| |Ambient temperature (storage/transport)|-40 °C ... 85 °C| |Coil side|| |Nominal input voltage UN|24 V DC| |Input voltage range in reference to UN|see diagram| |Typical input current at UN|7 mA| |Typical response time|5 ms| |Typical release time|2.5 ms| Ambient conditions ## Coil side 07/18/2017 Page 1 / 9 https://www.phoenixcontact.com/us/products/2909642 ## Single relay - REL-MR- 24DC/21/MS - 2909642 ## Technical data ## Coil side |Coil resistance|3390 Ω ±10 % (at 20 °C)| |---|---| |Power dissipation for nominal condition|0.17 W| |Contact side|| |Contact type|1 PDT| |Type of switch contact|Single contact| |Contact material|AgSnO| |Maximum switching voltage|250 V AC/DC| |Minimum switching voltage|5 V (at 100 mA)| |Min. switching current|10 mA (at 12 V)| |Maximum inrush current|10 A (4 s)| |Limiting continuous current|6 A| |Interrupting rating (ohmic load) max.|140 W (at 24 V DC)| ||20 W (at 48 V DC)| ||18 W (at 60 V DC)| ||23 W (at 110 V DC)| ||40 W (at 220 V DC)| ||1500 VA (for 250 V AC)| |Switching capacity in acc. with DIN VDE 0660/IEC 60947|2 A (at 24 V, DC13)| ||0.2 A (at 110 V, DC13)| ||0.1 A (at 220 V, DC13)| ||3 A (at 24 V, AC15)| ||3 A (at 120 V, AC15)| 3 A (at 230 V, AC15) General Test voltage relay winding/relay contact 4 kV AC (50 Hz, 1 min.) Operating mode 100% operating factor Degree of protection RT II (flux-proof) Mechanical service life 1 x 107 cycles Mounting position any Assembly instructions In rows with zero spacing ~~—~~ Standards and Regulations Standards/regulations IEC 60664 EN 50178 EN 61810-1 Degree of pollution 3 Overvoltage category III ~~SSS~~ 07/18/2017 Page 2 / 9 https://www.phoenixcontact.com/us/products/2909642 ## Single relay - REL-MR- 24DC/21/MS - 2909642 ## Technical data ## Environmental Product Compliance |China RoHS|Environmentally Friendly Use Period = 50| |---|---| ||For details about hazardous substances go to tab “Downloads”, Category<br>“Manufacturer's declaration”| ## Drawings **==> picture [35 x 9] intentionally omitted <==** **----- Start of picture text -----**<br> Diagram<br>**----- End of picture text -----**<br> ## Drilling diagram **==> picture [212 x 101] intentionally omitted <==** **----- Start of picture text -----**<br> A 1 A 1,3 1,9<br>TTT ET<br>SCHEELEHA HH<br>Preity tt te ett ry<br>a = pitch division 1.25 mm and 1.27 mm<br>1,2<br>**----- End of picture text -----**<br> Interrupting rating **==> picture [417 x 156] intentionally omitted <==** **----- Start of picture text -----**<br> Diagram Circuit diagram<br>U<br>UN 3<br>ANT) 2,5 Rane :<br>A<br>2 TPNHBnse son ene ee<br> 4 |<br>1,5 TTT !<br>A2 A1 12 11 14<br>1 TCT TINT OO<br>B<br>TUTTE<br>0,5 MeeeTT TI |<br>0 10 20 30 40 50 60 70 80 90 100<br>TU [°C]<br>**----- End of picture text -----**<br> ## Classifications ## eCl@ss |eCl@ss 5.0|eCl@ss 5.0|27371601| |---|---|---| |eCl@ss 5.1|eCl@ss 5.1|27371601| |eCl@ss 6.0|eCl@ss 6.0|27371601| |eCl@ss 7.0|eCl@ss 7.0|27371601| |eCl@ss 8.0|eCl@ss 8.0|27371601| 07/18/2017 Page 3 / 9 https://www.phoenixcontact.com/us/products/2909642 ## Single relay - REL-MR- 24DC/21/MS - 2909642 ## Classifications ## eCl@ss |eCl@ss 9.0|27371601| |---|---| |ETIM|| |ETIM 2.0|EC001437| |ETIM 3.0|EC001437| |ETIM 4.0|EC001437| |ETIM 5.0|EC001437| |ETIM 6.0|EC001437| ## UNSPSC |UNSPSC 6.01|UNSPSC 6.01|30211916| |---|---|---| |UNSPSC 7.0901|UNSPSC 7.0901|39121515| |UNSPSC 11|UNSPSC 11|39121515| |UNSPSC 12.01|UNSPSC 12.01|39121515| |UNSPSC 13.2|UNSPSC 13.2|39122334| ## Approvals ## Approvals ## Approvals UL Recognized / cUL Recognized / cULus Recognized Ex Approvals Approval details > UL Recognized http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 228652 ~~oo~~ > cUL Recognized http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 228652 ~~ee~~ 07/18/2017 Page 4 / 9 https://www.phoenixcontact.com/us/products/2909642 ## Single relay - REL-MR- 24DC/21/MS - 2909642 Approvals > cULus Recognized http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm ~~es~~ Accessories Additional products Relay socket - PLC-BPT- 24DC/21 - 2900445 6.2 mm PLC basic terminal block with push-in connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 24 V DC Relay socket - PLC-BSP- 24DC/21 - 2967219 6.2 mm PLC basic terminal block with spring-cage connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 24 V DC ~~eo~~ Relay socket - PLC-BSC- 24DC/21 - 2966016 6.2 mm PLC basic terminal block with screw connection, without relays or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 24 V DC ~~eo~~ Relay socket - PLC-BPT- 24UC/21 - 2900446 6.2 mm PLC basic terminal block with push-in connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 24 V AC/DC 07/18/2017 Page 5 / 9 https://www.phoenixcontact.com/us/products/2909642 ## Single relay - REL-MR- 24DC/21/MS - 2909642 ## Accessories Relay socket - PLC-BSP- 24UC/21 - 2967222 6.2 mm PLC basic terminal block with spring-cage connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 24 V AC/DC ~~So~~ Relay socket - PLC-BSC- 24UC/21 - 2966029 6.2 mm PLC basic terminal block with screw connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 24 V AC/DC ~~So~~ Basic terminal block - PLC-BSC- 36DC/21 - 2966964 Basic terminal block Relay socket - PLC-BPT- 48DC/21 - 2900447 6.2 mm PLC basic terminal block with push-in connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 48 V DC Relay socket - PLC-BSP- 48DC/21 - 2967329 6.2 mm PLC basic terminal block with spring-cage connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 48 V DC ~~eo~~ 07/18/2017 Page 6 / 9 https://www.phoenixcontact.com/us/products/2909642 ## Single relay - REL-MR- 24DC/21/MS - 2909642 ## Accessories Relay socket - PLC-BSC- 48DC/21 - 2966090 6.2 mm PLC basic terminal block with screw connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 48 V DC ~~eo~~ Relay socket - PLC-BPT- 24DC/ 1/SEN - 2900262 6.2 mm PLC basic terminal block for input functions with push-in connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, with sensor supply voltage distribution (BB), 1 N/O contact, input voltage 24 V DC Relay socket - PLC-BSP- 24DC/ 1/SEN - 2967206 6.2 mm PLC basic terminal block for input functions with spring-cage connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, with sensor supply voltage distribution (BB), 1 N/O contact, input voltage 24 V DC ~~eo~~ Relay socket - PLC-BSC- 24DC/ 1/SEN - 2966061 6.2 mm PLC basic terminal block for input functions with screw connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, with sensor supply voltage distribution (BB), 1 N/O contact, input voltage 24 V DC ~~eo~~ Relay socket - PLC-BPT- 24UC/ 1/ACT - 2900450 6.2 mm PLC basic terminal block for output functions with push-in connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, with load return line connection (BB), 1 N/O contact, input voltage 24 V AC/DC 07/18/2017 Page 7 / 9 https://www.phoenixcontact.com/us/products/2909642 ## Single relay - REL-MR- 24DC/21/MS - 2909642 ## Accessories Relay socket - PLC-BSP- 24UC/ 1/ACT - 2982809 6.2 mm PLC basic terminal block for output functions with spring-cage connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, with load return line connection (BB), 1 N/O contact, input voltage 24 V AC/DC - Relay socket - PLC-BSC- 24UC/ 1/ACT - 2982799 6.2 mm PLC basic terminal block for output functions with screw connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, with load return line connection (BB), 1 N/O contact, input voltage 24 V AC/DC - Relay socket - PLC-BSC- 24DC/21/SO46 - 2980458 6.2 mm PLC basic terminal block with protection against interference currents and interference voltages on the control side, with screw connection, without relay or solid-state relay, for mounting on NS 35/7,5 DIN rail, with increased input current consumption, 1 PDT, 24 V DC input voltage ~~eo~~ Relay socket - RIF-0-BPT/21 - 2900958 RIF-0... relay base, for miniature power relay with 1 PDT or solid-state relays of the same design, push-in connection, for mounting on NS 35/7,5 ~~SO~~ Relay socket - RIF-0-BSC/21 - 2900957 RIF-0... relay base, for miniature power relay with 1 changeover contact or identical solid-state relays, screw connection, for mounting on NS 35/7,5 ~~a~~ 07/18/2017 Page 8 / 9 https://www.phoenixcontact.com/us/products/2909642 Phoenix Contact 2017 © - all rights reserved http://www.phoenixcontact.com 07/18/2017 Page 9 / 9
Updated at June 10, 2026
Phoenix Contact is a global leader in industrial connection technology, automation systems, and electronic interface solutions. With decades of engineering heritage originating in Germany, the company develops robust components designed to ensure reliable power, data, and signal transmission across demanding manufacturing and industrial environments. The cornerstone of the Phoenix Contact portfolio is its industry-leading selection of connection technologies. The range features an exceptional variety of terminal blocks, including pluggable headers and sockets, highly reliable wire-to-board solutions, and versatile DIN rail terminal blocks. These foundational connectivity components are supported by a comprehensive ecosystem of power distribution blocks, interface modules, marking systems, and accessories engineered for seamless control cabinet wiring. Beyond physical connectivity, Phoenix Contact provides critical components for advanced automation, control, and system protection. The wider offering encompasses a broad spectrum of process controllers, high-efficiency AC/DC converters, and a comprehensive suite of power, safety, and solid-state relays. From precision signal converters and electronic circuit breakers to fiber optic cable assemblies, Phoenix Contact equips engineers with the high-performance technologies required to build secure, highly efficient, and future-ready industrial systems.
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