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2987943
Power Relay, DPDT, 24 VDC, 1.5 A, REL-MR Series, Through Hole, Non Latching
⚠️ 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: Non Latching
- Coil Voltage: 24VDC
- Product Range: REL-MR Series
- Relay Mounting: Through Hole
- Coil Resistance: -
- Contact Current: 1.5A
- Relay Terminals: Solder
- Contact Material: Silver Nickel
- Contact Voltage VAC: 250V
- Contact Voltage VDC: 250V
- Contact Configuration: DPDT
| Delivery and price | |
|---|---|
| Units per pack | 50 |
| Price | 5.02 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
## REL-MR- 24DC/21-21/MS - Single relay 2987943 https://www.phoenixcontact.com/gb/products/2987943 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 documentation. Our general terms of use for downloads are valid. Plug-in miniature relay, with power contact, 2 changeover contacts, test button, mechanical switching position indicator, status LED, freewheeling diode, polarity A1+, A2, input voltage 24 V DC ## Your advantages - - - - - With detectable manual operation - DC types with integrated freewheeling diode - Integrated status LED - Mechanical switch position indicator ## Commercial data |Item number|2987943| |---|---| |Packing unit|10 pc| |Minimum order quantity|10 pc| |Sales key|CK6937| |Product key|CK6937| |Catalog page|Page 292 (C-5-2019)| |GTIN|4046356480659| |Weight per piece (including packing)|19.576 g| |Weight per piece (excluding packing)|18.64 g| |Customs tariff number|85364190| |Country of origin|CN| Oct 24, 2024, 7:09 AM Page 1 (11) ## REL-MR- 24DC/21-21/MS - Single relay 2987943 https://www.phoenixcontact.com/gb/products/2987943 ## Technical data ## Product properties |oduct properties|| |---|---| |Product type|Single relay| |Mechanical service life|5x 106cycles| |Data management status|| |Date of last data management|20.06.2024| |Article revision|02| ## Electrical properties |ectrical properties|| |---|---| |Service life electrical|see diagram| |Maximum power dissipation for nominal condition|0.43 W| |Test voltage (Winding/contact)|5 kV AC (50 Hz, 1 min., winding/contact)| |Test voltage (Contact/contact)|5 kV AC (50 Hz, 1 min., contact/contact)| |Test voltage (Changeover contact/changeover contact)|5 kV AC (50 Hz, 1 min., changeover contact/changeover contact)| ## Input data ## Coil side |Coil side|| |---|---| |Nominal input voltage UN|24 V DC| |Input voltage range|19.2 V DC ... 52.8 V DC| |Input voltage range in reference to UN|see diagram| |Drive and function|monostable| |Drive (polarity)|non-polarized| |Typical input current at UN|18 mA| |Typical response time|9 ms| |Typical release time|6 ms| ## Output data ## Switching Contact switching type 2 changeover contacts Type of switch contact Single contact Contact material AgNi Maximum switching voltage 250 V AC/DC Minimum switching voltage 12 V (at 10 mA) Limiting continuous current 8 A Maximum inrush current 16 A (20 ms) Min. switching current 10 mA (at 12 V) Interrupting rating (ohmic load) max. 2000 VA (for 250 V AC) Switching capacity 1 A (at 24 V, DC13) 1.5 A (at 24 V, AC15) 1.5 A (at 120 V, AC15) 1.5 A (at 240 V, AC15) Oct 24, 2024, 7:09 AM Page 2 (11) ## REL-MR- 24DC/21-21/MS - Single relay ## 2987943 https://www.phoenixcontact.com/gb/products/2987943 **==> picture [365 x 54] intentionally omitted <==** **----- Start of picture text -----**<br> ||| |---|---| |Motor load according to UL 508|1/4 HP, 120 V AC (N/O contact)| |1/2 HP, 240 V AC (N/O contact)| |1/4 HP, 120 V AC (N/C contact)| |1/3 HP, 240 V AC (N/C contact)| **----- End of picture text -----**<br> ## Connection data Connection method Plug / solder connection ## Dimensions **==> picture [283 x 118] intentionally omitted <==** **----- Start of picture text -----**<br> ||| |---|---| |Dimensional drawing| |Width|12.7 mm| |Height|29 mm| |Depth|25 mm| **----- End of picture text -----**<br> ## Environmental and real-life conditions **==> picture [316 x 39] intentionally omitted <==** **----- Start of picture text -----**<br> ||| |---|---| |Ambient conditions| |Ambient temperature (operation)|-40 °C ... 70 °C| |Ambient temperature (storage/transport)|-40 °C ... 85 °C| **----- End of picture text -----**<br> ## Approvals **==> picture [366 x 37] intentionally omitted <==** **----- Start of picture text -----**<br> ||| |---|---| |Corrosive gas test| |Identification|ISA-S71.04. G3 Harsh Group| |EN 60068-2-60| **----- End of picture text -----**<br> ## Standards and regulations **==> picture [304 x 38] intentionally omitted <==** **----- Start of picture text -----**<br> ||| |---|---| |Standards/regulations|EN 61810-1| |VDE 0435-201| |EN 50178| **----- End of picture text -----**<br> Oct 24, 2024, 7:09 AM Page 3 (11) ## REL-MR- 24DC/21-21/MS - Single relay 2987943 https://www.phoenixcontact.com/gb/products/2987943 ## Drawings **==> picture [408 x 491] intentionally omitted <==** **----- Start of picture text -----**<br> Circuit diagram<br>A1 12 11 14<br>A2 22 21 24<br>Diagram<br>100<br>80<br>60<br>A B<br>40<br>20<br>0<br>-40 -20 0 20 40 60 80 100<br> [°C]<br>HR [%]<br>**----- End of picture text -----**<br> Permissible humidity for operation and storage. The maximum permissible ambient temperature as specified in the data sheet must be observed. Area A: Ice buildup at ambient temperatures ≤ 0°C must be prevented Area B: Condensation at ambient temperatures > 0°C must be prevented On 30 full days that are naturally distributed across an entire year, a humidity level of 95% is permissible at an ambient temperature ≤ 25°C. Oct 24, 2024, 7:09 AM Page 4 (11) ## REL-MR- 24DC/21-21/MS - Single relay 2987943 https://www.phoenixcontact.com/gb/products/2987943 **==> picture [406 x 590] intentionally omitted <==** **----- Start of picture text -----**<br> Dimensional drawing<br>29 12,7<br>Diagram<br>20<br>10<br>5<br>2<br>1<br>0,5<br>0,2<br>0,1<br>10 20 30 50 70 100 200 300 400500<br>Switching voltage [V]<br>AC, ohmic load<br>DC, ohmic load, contacts in series<br>DC, ohmic load<br>Switching current [A]<br>25<br>3,6<br>**----- End of picture text -----**<br> Interrupting rating Oct 24, 2024, 7:09 AM Page 5 (11) ## REL-MR- 24DC/21-21/MS - Single relay ## 2987943 https://www.phoenixcontact.com/gb/products/2987943 **==> picture [412 x 266] intentionally omitted <==** **----- Start of picture text -----**<br> Diagram<br>2,6<br>2,4<br>2,2<br>2<br>1,8<br>1,6<br>1,4<br>1,2<br>1<br>0,8<br>0,6<br>0 10 20 30 40 50 60 70 80 90 100<br>Ambient temperature [°C]<br>N<br>Coil voltage U/U<br>**----- End of picture text -----**<br> DC coils, 0 A contact current DC coils, 8 A contact current AC coils, 0 A contact current AC coils, 8 A contact current Operating voltage range Oct 24, 2024, 7:09 AM Page 6 (11) ## REL-MR- 24DC/21-21/MS - Single relay 2987943 https://www.phoenixcontact.com/gb/products/2987943 Diagram **==> picture [398 x 283] intentionally omitted <==** **----- Start of picture text -----**<br> 107<br>106<br>105<br>104<br>0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16<br>Switching current [A]<br>250 V AC, ohmic load<br>Cycles<br>**----- End of picture text -----**<br> Electrical service life Oct 24, 2024, 7:09 AM Page 7 (11) ## REL-MR- 24DC/21-21/MS - Single relay 2987943 https://www.phoenixcontact.com/gb/products/2987943 ## Diagram **==> picture [398 x 225] intentionally omitted <==** **----- Start of picture text -----**<br> 1<br>0,9<br>0,8<br>0,7<br>0,6<br>0,5<br>0,4<br>0,3<br>1 0,9 0,8 0,7 0,6 0,5 0,4 0,3 0,2<br>COS [�]<br>Reduction factor<br>**----- End of picture text -----**<br> Service life reduction factor with various cos phi Oct 24, 2024, 7:09 AM Page 8 (11) ## REL-MR- 24DC/21-21/MS - Single relay 2987943 https://www.phoenixcontact.com/gb/products/2987943 ## Approvals To download certificates, visit the product detail page: https://www.phoenixcontact.com/gb/products/2987943 cUL Recognized Approval ID: FILE E 195083 UL Recognized Approval ID: FILE E 195083 EAC Approval ID: RU*C-DE.*08.B.00010 VDE Zeichengenehmigung Approval ID: 40027210 cULus Recognized Oct 24, 2024, 7:09 AM Page 9 (11) ## REL-MR- 24DC/21-21/MS - Single relay 2987943 https://www.phoenixcontact.com/gb/products/2987943 ## Classifications ## ECLASS |CLASS|| |---|---| |ECLASS-11.0|27371601| |ECLASS-12.0|27371601| |ECLASS-13.0|27371601| ## ETIM ||ETIM 9.0|EC001437| |---|---|---| ||NSPSC|| ||UNSPSC 21.0|39122300| ## UNSPSC Oct 24, 2024, 7:09 AM Page 10 (11) ## REL-MR- 24DC/21-21/MS - Single relay 2987943 https://www.phoenixcontact.com/gb/products/2987943 ## Environmental product compliance |ironmental product compliance|| |---|---| |EU RoHS|| |Fulfills EU RoHS substance requirements|Yes| |Exemption|7(c)-I| |China RoHS|| |Environment friendly use period (EFUP)|EFUP-E| ||No hazardous substances above the limits| ## EU REACH SVHC REACH candidate substance (CAS No.) No substance above 0.1 wt% EF3.0 Climate Change CO2e kg 0.2 kg CO2e Phoenix Contact 2024 © - all rights reserved https://www.phoenixcontact.com PHOENIX CONTACT Ltd Halesfield 13, Telford Shropshire, TF7 4PG 01952 681700 info@phoenixcontact.co.uk Oct 24, 2024, 7:09 AM Page 11 (11)
Updated at June 5, 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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