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2910508
Power Relay, DPDT, 24 VAC/VDC, 50 mA, PLC-INTERFACE Series, DIN Rail
⚠️ 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: Hexahydromethylphthalic anhydride [1], Hexahydro-4-methylphthalic anhydride [2], Hexahydro-1-methylphthalic anhydride[3] (25-Jun-2025)
- Coil Type: -
- Coil Voltage: 24VAC/VDC
- Product Range: PLC-INTERFACE Series
- Relay Mounting: DIN Rail
- Coil Resistance: -
- Contact Current: 50mA
- Relay Terminals: Screw
- Contact Material: Silver Nickel
- Contact Voltage VAC: 30V
- Contact Voltage VDC: 36V
- Contact Configuration: DPDT
| Delivery and price | |
|---|---|
| Units per pack | 10 |
| Price | 24.49 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 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) PLC-INTERFACE, consisting of a relay base and pluggable multilayer gold contact relay with manual operation, integrated status LED, Screw connection, 2 PDT, Input voltage: 24 V AC/DC ## Key Commercial Data |Packing unit|1 pc|1 pc||||||||||| |---|---|---|---|---|---|---|---|---|---|---|---|---| |||||||||||||| |GTIN||||||||||||| |||||||||||||| |GTIN|4055626486635|||||||||||| |Weight per Piece (excluding packing)|80.000 g||||80.000 g|||||||| |Custom tariff number|85364190|||||||||||| |Country of origin|Germany|||||||||||| ## Technical data ## Note |Utilization restriction|EMC: class A product, see manufacturer's declaration in the download| |---|---| ||area| |Dimensions|| |Width|14 mm| |Height|80 mm| |Depth|104 mm| |Ambient conditions|| |Ambient temperature (operation)|-20 °C ... 60 °C| |Ambient temperature (storage/transport)|-20 °C ... 85 °C| |Maximum altitude|≤ 2000 m| |Degree of protection|RT II (Relay)| 10/22/2019 Page 1 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Technical data ## Ambient conditions IP20 (Relay base) ≥ IP54 (Installation location) **==> picture [542 x 522] intentionally omitted <==** **----- Start of picture text -----**<br> ||| |---|---| |Coil side| |Nominal input voltage UN|24 V AC/DC| |Typical input current at UN|18 mA| |Typical response time|3 ms ... 15 ms| |Typical release time range|3 ms ... 15 ms| |Coil voltage|24 V DC| |Protective circuit|Bridge rectifier Bridge rectifier| |Operating voltage display|Yellow LED| |pg| |Contact side| |Contact type|2 PDT| |Type of switch contact|Single contact| |Contact material|AgNi + Au| |Maximum switching voltage|30 V AC| |36 V DC| |Minimum switching voltage|12 V (1 mA)| |Min. switching current|1 mA (12 V)| |Maximum inrush current|50 mA| |Limiting continuous current|50 mA| |Contact side (with destroyed gold layer)| |Note|the following values are applicable if a gold layer is destroyed| |Maximum switching voltage|250 V AC/DC| |Minimum switching voltage|12 V| |Limiting continuous current|6 A| |Maximum inrush current|12 A (20 ms)| |Min. switching current|10 mA| |Interrupting rating (ohmic load) max.|192 W (24 V DC)| |62 W (48 V DC)| |42 W (60 V DC)| |55 W (110 V DC)| |66 W (220 V DC)| |2000 VA (250 V AC)| |Switching capacity|1 A (24 V, DC13)| |1.5 A (230 V, AC15)| |___| |10/22/2019 Page 2 / 16| **----- End of picture text -----**<br> https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Technical data General Test voltage relay winding/relay contact 4 kV AC (50 Hz, 1 min.) Test voltage PDT/PDT 2.5 kV AC (50 Hz, 1 min.) Operating mode 100% operating factor Mechanical service life 5x 106 cycles Mounting position any Assembly instructions In rows with zero spacing ~~=~~ Connection data Connection name Coil side Connection method Screw connection Stripping length 8 mm Screw thread M3 Conductor cross section solid 0.14 mm² ... 2.5 mm² Conductor cross section flexible 0.14 mm² ... 2.5 mm² 0.2 mm² ... 2.5 mm² (Single ferrule) 2x 0.5 mm² ... 1.5 mm² (TWIN ferrule) Conductor cross section AWG 26 ... 14 ~~==~~ Connection data 2 Connection name Contact side Connection method Screw connection Stripping length 8 mm Screw thread M3 Conductor cross section solid 0.14 mm² ... 2.5 mm² Conductor cross section flexible 0.14 mm² ... 2.5 mm² 0.2 mm² ... 2.5 mm² (Single ferrule) 2x 0.5 mm² ... 1.5 mm² (TWIN ferrule) Conductor cross section AWG 26 ... 14 ~~=~~ Standards and Regulations Designation Standards/regulations Standards/regulations EN 50178 ~~=~~ Rated insulation voltage 250 V AC Rated surge voltage 6 kV Insulation Basic insulation Pollution degree 2 Overvoltage category III UL, USA UL 508 UL 508 Recognized ~~==~~ 10/22/2019 Page 3 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Technical data |Technical data|| |---|---| |Standards and Regulations|| |UL, USA/Canada<br>cUL 508<br>cUL 508 Recognized<br>~~——————————————~~|| |Conformance/approvals|| |Designation|UL, USA| |Identification|UL 508| ||UL 508 Recognized| |Designation|UL, USA/Canada| |Identification|UL 508| UL 508 Recognized |~~SSS~~|Lead 7439-92-1<br>~~SSS~~| |---|---| |China RoHS<br>~~SSS~~|Environmentally Friendly Use Period = 50<br>~~SSS~~| |~~SSS~~|For details about hazardous substances go to tab “Downloads”, Category<br>“Manufacturer's declaration”<br>~~SSS~~| Drawings 10/22/2019 Page 4 / 16 https://www.phoenixcontact.com/us/products/2910508 Diagram ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 Curve A Maximum permissible continuous voltage Umax with limiting continuous current on the contact side (see relevant technical data) Curve B Minimum permissible operate voltage Uop after pre-excitation (see relevant technical data) 10/22/2019 Page 5 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 Diagram Interrupting rating 10/22/2019 Page 6 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 **==> picture [35 x 9] intentionally omitted <==** **----- Start of picture text -----**<br> Diagram<br>**----- End of picture text -----**<br> Electrical service life 10/22/2019 Page 7 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 **==> picture [35 x 9] intentionally omitted <==** **----- Start of picture text -----**<br> Diagram<br>**----- End of picture text -----**<br> Service life reduction factor Circuit diagram 10/22/2019 Page 8 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Articles in set Relay base - PLC-BSC- 24UC/21-21/H - 1012004 14 mm PLC basic terminal block without relay, for mounting on DIN rail NS 35/7,5, Screw connection, 2 PDT, Input voltage 24 V AC/DC Single relay - REL-MR- 24DC/21-21AU/MS - 2987985 Plug-in miniature relay, with multi-layer contact with hard gold coating, 2 PDTs, test button, mechanical switch position indicator, status LED, freewheeling diode, polarity A1+, A2-, input voltage 24 V DC ## Classifications ## eCl@ss |eCl@ss 5.0|eCl@ss 5.0|27371600| |---|---|---| |eCl@ss 5.1|eCl@ss 5.1|27371600| |eCl@ss 6.0|eCl@ss 6.0|27371600| |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|ETIM 2.0|EC001437| |---|---|---| |ETIM 3.0|ETIM 3.0|EC001437| |ETIM 4.0|ETIM 4.0|EC001437| |ETIM 5.0|ETIM 5.0|EC001437| |ETIM 6.0|ETIM 6.0|EC001437| |ETIM 7.0|ETIM 7.0|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| 10/22/2019 Page 9 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Approvals ## Approvals ## Approvals UL Listed / UL Recognized / cUL Recognized / cUL Listed / DNV GL / EAC / EAC / cULus Recognized / cULus Listed ## Ex Approvals Approval details UL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 172140 ~~oo~~ UL Recognized http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 238705 ~~oo~~ cUL Recognized http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 238705 ~~oo~~ cUL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 172140 ~~oo~~ DNV GL https://approvalfinder.dnvgl.com/ TAE0000196-02 ~~oo~~ EAC TR_TS_D_00573_c ~~oo~~ EAC TR_TS_S_00010_c ~~ee~~ 10/22/2019 Page 10 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Approvals > cULus Recognized cULus Listed ~~oo~~ Accessories Accessories Bridge Continuous plug-in bridge - FBST 500-PLC RD - 2966786 Continuous plug-in bridge, length: 500 mm, color: red Continuous plug-in bridge - FBST 500-PLC BU - 2966692 Continuous plug-in bridge, length: 500 mm, color: blue Continuous plug-in bridge - FBST 500-PLC GY - 2966838 Continuous plug-in bridge, length: 500 mm, color: gray 10/22/2019 Page 11 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Accessories Single plug-in bridge - FBST 6-PLC RD - 2966236 Single plug-in bridge, length: 6 mm, number of positions: 2, color: red Single plug-in bridge - FBST 6-PLC BU - 2966812 Single plug-in bridge, length: 6 mm, number of positions: 2, color: blue Single plug-in bridge - FBST 6-PLC GY - 2966825 Single plug-in bridge, length: 6 mm, number of positions: 2, color: gray Single plug-in bridge - FBST 8-PLC GY - 2967688 Single plug-in bridge, length: 8 mm, number of positions: 2, color: gray ~~a~~ Single plug-in bridge - FBST 14-PLC BK - 2967691 **==> picture [63 x 81] intentionally omitted <==** **----- Start of picture text -----**<br> DIN rail<br>a<br>**----- End of picture text -----**<br> Single plug-in bridge, length: 14 mm, number of positions: 2, color: black 10/22/2019 Page 12 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Accessories DIN rail, unperforated - NS 35/ 7,5 V2A UNPERF 2000MM - 0801377 DIN rail, unperforated, Standard profile, width: 35 mm, height: 7.5 mm, acc. to EN 60715, material: Stainless steel V2A, uncoated, length: 2000 mm, color: silver DIN rail perforated - NS 35/ 7,5 PERF 2000MM - 0801733 DIN rail perforated, Standard profile, width: 35 mm, height: 7.5 mm, acc. to EN 60715, material: Steel, galvanized, passivated with a thick layer, length: 2000 mm, color: silver DIN rail, unperforated - NS 35/ 7,5 CU UNPERF 2000MM - 0801762 DIN rail, unperforated, Standard profile, width: 35 mm, height: 7.5 mm, acc. to EN 60715, material: Copper, uncoated, length: 2000 mm, color: copper-colored DIN rail, unperforated - NS 35/15 UNPERF 2000MM - 1201714 DIN rail, unperforated, Standard profile, width: 35 mm, height: 15 mm, similar to EN 60715, material: Steel, galvanized, passivated with a thick layer, length: 2000 mm, color: silver DIN rail, unperforated - NS 35/15 CU UNPERF 2000MM - 1201895 DIN rail, unperforated, Standard profile, width: 35 mm, height: 15 mm, similar to EN 60715, material: Copper, uncoated, length: 2000 mm, color: copper-colored 10/22/2019 Page 13 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Accessories DIN rail, unperforated - NS 35/15-2,3 UNPERF 2000MM - 1201798 DIN rail, unperforated, Standard profile 2.3 mm, width: 35 mm, height: 15 mm, acc. to EN 60715, material: Steel, galvanized, passivated with a thick layer, length: 2000 mm, color: silver DIN rail, unperforated - NS 35/15 AL UNPERF 2000MM - 1201756 DIN rail, unperforated, Standard profile, width: 35 mm, height: 15 mm, similar to EN 60715, material: Aluminum, uncoated, length: 2000 mm, color: silver ~~So~~ DIN rail perforated - NS 35/15 PERF 2000MM - 1201730 DIN rail perforated, Standard profile, width: 35 mm, height: 15 mm, similar to EN 60715, material: Steel, galvanized, passivated with a thick layer, length: 2000 mm, color: silver DIN rail, unperforated - NS 35/ 7,5 UNPERF 2000MM - 0801681 DIN rail, unperforated, Standard profile, width: 35 mm, height: 7.5 mm, acc. to EN 60715, material: Steel, galvanized, passivated with a thick layer, length: 2000 mm, color: silver ## Labeled terminal marker Zack marker strip - ZB10,LGS:FORTL.ZAHLEN - 1053014 Zack marker strip, Strip, white, labeled, can be labeled with: CMS-P1-PLOTTER, printed horizontally: consecutive numbers 1 ... 10, 11 ... 20, etc. up to 991 ... 1000, mounting type: snap into tall marker groove, for terminal block width: 10.2 mm, lettering field size: 10.15 x 10.5 mm, Number of individual labels: 10 10/22/2019 Page 14 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Accessories ## Partition plate Separating plate - PLC-ATP BK - 2966841 Separating plate, 2 mm thick, required at the start and end of a PLC terminal strip. Furthermore, it is used for: visual separation of groups, safe isolation of different voltages of neighboring PLC relays in acc. with DIN VDE 0106-101, isolation ## Power module Power terminal block - PLC-ESK GY - 2966508 Power terminal block, for the input of up to four potentials, for mounting on NS 35/7.5 ## Screwdriver tools Screwdriver - SZF 1-0,6X3,5 - 1204517 Actuation tool, for ST terminal blocks, also suitable for use as a bladed screwdriver, size: 0.6 x 3.5 x 100 mm, 2- component grip, with non-slip grip ## Terminal marking Zack marker strip - ZB10/WH-100:UNBEDRUCKT - 5060883 Zack marker strip, Strip, white, unlabeled, can be labeled with: CMS-P1-PLOTTER, PLOTMARK, mounting type: snap into tall marker groove, for terminal block width: 10.2 mm, lettering field size: 10.15 x 10.5 mm, Number of individual labels: 1000 10/22/2019 Page 15 / 16 https://www.phoenixcontact.com/us/products/2910508 ## Relay Module - PLC-RSC- 24UC/21-21AU/MS - 2910508 ## Accessories Zack marker strip - ZB 10:UNBEDRUCKT - 1053001 Zack marker strip, Strip, white, unlabeled, can be labeled with: PLOTMARK, CMS-P1-PLOTTER, mounting type: snap into tall marker groove, for terminal block width: 10.2 mm, lettering field size: 10.5 x 10.15 mm, Number of individual labels: 10 ## Spare parts Single relay - REL-MR- 24DC/21-21AU/MS - 2987985 Plug-in miniature relay, with multi-layer contact with hard gold coating, 2 PDTs, test button, mechanical switch position indicator, status LED, freewheeling diode, polarity A1+, A2-, input voltage 24 V DC Phoenix Contact 2019 © - all rights reserved http://www.phoenixcontact.com 10/22/2019 Page 16 / 16
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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