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2908821
Power Relay, SPDT, 12 VDC, 6 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: 12VDC
- Product Range: REL-MR Series
- Relay Mounting: Through Hole
- Coil Resistance: 360ohm
- Contact Current: 6A
- Relay Terminals: Solder
- Contact Material: Silver Nickel
- Contact Voltage VAC: 250V
- Contact Voltage VDC: 250V
- Contact Configuration: SPDT
| Delivery and price | |
|---|---|
| Units per pack | 5 |
| Price | 8.16 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
https://www.phoenixcontact.com/us/products/2908821
## Single relay - REL-MR-12DC/21HC/EX - 2908821
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 for high continuous currents, 1 changeover contact, 12 V DC input voltage for use in Zone 2 applications
## Why buy this product
Switching current of up to 16 A RT III-proof (wash-proof)
## Key Commercial Data
|Packing unit|1 STK|1 STK|1 STK|1 STK|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Minimum order quantity|10 STK|10 STK|||||||||||
||||||||||||||
|GTIN|||||||||||||
||||||||||||||
|GTIN|4055626345154||||||||||||
|Weight per Piece (excluding packing)|16.000 g||||16.000 g||||||||
|Custom tariff number|85364190||||||||||||
|Country of origin|Austria||||||||||||
## Technical data
## Dimensions
|Width|12.7 mm|
|---|---|
|Height|29 mm|
|Depth|15.7 mm|
|Ambient conditions||
|Ambient temperature (operation)|-40 °C ... 85 °C|
|Ambient temperature (storage/transport)|-40 °C ... 85 °C|
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## Single relay - REL-MR-12DC/21HC/EX - 2908821
## Technical data
## Coil side
|Coil side||
|---|---|
|Nominal input voltage UN|12 V DC|
|Input voltage range in reference to UN|see diagram|
|Typical input current at UN|33 mA|
|Typical response time|7 ms|
|Typical release time|3 ms|
|Coil resistance|360 Ω ±10 % (at 20 °C)|
|Power dissipation for nominal condition|0.4 W|
|Contact side||
|Contact type<br>1 PDT<br>Type of switch contact<br>Single contact<br>Contact material<br>AgNi<br>Maximum switching voltage<br>250 V AC/DC<br>Minimum switching voltage<br>12 V (at 10 mA)<br>Min. switching current<br>10 mA (at 12 V)<br>Maximum inrush current<br>50 A (20 ms)<br>Limiting continuous current<br>16 A<br>Interrupting rating (ohmic load) max.<br>384 W (at 24 V DC)<br>58 W (at 48 V DC)<br>48 W (at 60 V DC)<br>50 W (at 110 V DC)<br>80 W (at 220 V DC)<br>4000 VA (for 250 V AC)<br>Switching capacity in acc. with DIN VDE 0660/IEC 60947<br>2 A (at 24 V, DC13)<br>0.2 A (at 110 V, DC13)<br>0.2 A (at 250 V, DC13)<br>6 A (at 24 V, AC15)<br>6 A (at 120 V, AC15)<br>6 A (at 250 V, AC15)<br>General<br>Test voltage relay winding/relay contact<br>5 kV AC (50 Hz, 1 min.)<br>Operating mode<br>100% operating factor<br>Degree of protection<br>RT III (wash-proof)<br>Mechanical service life<br>3 x 10<br>7cycles<br>Mounting position<br>any<br>Assembly instructions<br>Can be aligned without spacing (> 70 °C ≥ 2.5 mm)<br>Standards and Regulations~~=~~<br>~~re~~||
||08/21/2017 Page 2 / 7|
https://www.phoenixcontact.com/us/products/2908821
## Single relay - REL-MR-12DC/21HC/EX - 2908821
## Technical data
## Standards and Regulations
|Standards/regulations|IEC 60664|
|---|---|
||EN 50178|
||EN 61810-1|
|Degree of pollution|3|
|Overvoltage category|III|
## 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 [135 x 24] intentionally omitted <==**
**----- Start of picture text -----**<br>
Drilling diagram<br>1,3 5 5 1,28<br>**----- End of picture text -----**<br>
## Diagram
**==> picture [176 x 105] intentionally omitted <==**
**----- Start of picture text -----**<br>
2,8<br>2,6<br>2,4 a a eeee<br>2,2<br>2 2 Li|CSREES| {| | [| | | ft ft<br>1<br>1,8<br>a<br>3 Bo 1,61,4 2 ><br>2 1,2 = P | |wy<br>a 0,81 Eeeee 2 1<br>0,6 ee ee ee ee |<br>0 10 20 30 40 50 60 70 80 90 100<br>N<br>**----- End of picture text -----**<br>
a = pitch division 2.5 mm
**==> picture [7 x 14] intentionally omitted <==**
**----- Start of picture text -----**<br>
1<br>2<br>**----- End of picture text -----**<br>
Operating voltage range
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https://www.phoenixcontact.com/us/products/2908821
## Single relay - REL-MR-12DC/21HC/EX - 2908821
**==> picture [174 x 331] intentionally omitted <==**
**----- Start of picture text -----**<br>
Diagram<br>20<br>——EEE—EEE<br>10 Nees | 1<br>===BN 5 642<br>3 2<br>eeeeet 2eee 0,50,31 Nee<br>0,2<br> a<br>0,1<br>10 ee 20 30 50 e 70 100 e 200 300<br>Switching voltage [V] —— —<br>1<br>2 a ohne lead<br>3 DC, L/R = 40 ms<br>Diagram<br>1<br>0,9 ee eee<br>tf 0,8 | J oAT |<br>0,7<br>0,6<br>s 0,5 {| | | | | | \<br>0,4<br>0,3 1 | 0,9 ft 0,8 | 0,7 | 0,6 ft 0,5 | 0,4 tT 0,3 tS 0,2<br>COS ( —— ><br>**----- End of picture text -----**<br>
Interrupting rating
**==> picture [170 x 154] intentionally omitted <==**
**----- Start of picture text -----**<br>
Diagram<br>107 Wo<br>= cascscascascasce<br>106 PRNSSS SSS SSSEEESSSSSSe=<br>a S>__ | + I re<br>1<br>2 ee<br>105 FREERPOP BSSERECT<br>SSS<br>=<br>BERREEEEEEEEEEE<br>1040 PDEE 1 2 3 4 EET 5 6 TEP 7 8 9 10 11 12 Pr 13 ee 14 15 16<br>Switching current [A] ——- ><br>1 250 V AC, ohmic load (DC coils)<br>2 250 V AC, ohmic load (AC coils)<br>Cycles<br>**----- End of picture text -----**<br>
Electrical service life
Dimensional drawing
**==> picture [165 x 73] intentionally omitted <==**
**----- Start of picture text -----**<br>
29 12,7<br>15,7<br>3,6<br>**----- End of picture text -----**<br>
Service life reduction factor with various cos phi
Circuit diagram
**==> picture [246 x 47] intentionally omitted <==**
**----- Start of picture text -----**<br>
| A1<br>||<br>| A2 |<br>||<br>= Se ee<br>12 11 14<br>**----- End of picture text -----**<br>
## Classifications
## eCl@ss
eCl@ss 5.0 27371601
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https://www.phoenixcontact.com/us/products/2908821
## Single relay - REL-MR-12DC/21HC/EX - 2908821
## Classifications
## eCl@ss
|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|
|eCl@ss 9.0|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 13.2|39122334|
## UNSPSC
## 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~~
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https://www.phoenixcontact.com/us/products/2908821
## Single relay - REL-MR-12DC/21HC/EX - 2908821
Approvals
> cULus Recognized http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm ~~OO~~ Accessories Additional products
Relay base - PLC-BPT- 12DC/21HC - 2900253
14 mm PLC basic terminal block for high continuous currents with push-in connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 12 V DC ~~eo~~ Relay base - PLC-BSP- 12DC/21HC - 2912332 14 mm PLC basic terminal block for high continuous currents with spring-cage connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 12 V DC ~~eo~~ Relay base - PLC-BSC- 12DC/21HC - 2967769 14 mm PLC basic terminal block for high continuous currents with screw connection, without relay or solid-state relay, for mounting on DIN rail NS 35/7,5, 1 PDT, input voltage 12 V DC ~~eo~~ Relay base - PR1-BSC2/2X21 - 2833518 Relay base PR1..., for miniature power relay or miniature switching relay with 1 or 2 PDT or solid-state relay of same construction, 2/2 level design, screw connections, connection facility for input/interference suppression modules
08/21/2017 Page 6 / 7
https://www.phoenixcontact.com/us/products/2908821
## Single relay - REL-MR-12DC/21HC/EX - 2908821
## Accessories
Relay base - PR1-BSC3/2X21 - 2833521
Relay base PR1..., for miniature power relay or miniature switching relay with 1 or 2 PDT or solid-state relay of same construction, 1/3 level design, screw connections, connection facility for input/interference suppression modules ~~ne~~ Relay base - PR1-BSP3/2X21 - 2833534 Relay base PR1..., for miniature power relay or miniature switching relay with 1 or 2 PDT or solid-state relay of same construction, 1/3 level design, spring-cage connections, connection facility for input/interference suppression modules ~~fe~~
Relay base - RIF-1-BPT/2X21 - 2900931
RIF-1... relay base, for miniature power relay with 1 or 2 PDTs or solid-state relays of the same design, push-in connection, plug-in option for input/suppressor modules, for mounting on NS 35/7,5
Relay base - RIF-1-BSC/2X21 - 2900930 RIF-1... relay base, for miniature power relay with 1 or 2 changeover contacts or identical solid-state relays, screw connection, plug-in option for input/interference suppression modules, for mounting on NS 35/7,5 ~~Se~~ Phoenix Contact 2017 © - all rights reserved http://www.phoenixcontact.com
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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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