2900350

Power Relay, DPDT, 72 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: Lead (04-Feb-2026)
Coil Type: -
Coil Voltage: 72VDC
Product Range: PLC-INTERFACE Series
Relay Mounting: DIN Rail
Coil Resistance: -
Contact Current: 50mA
Relay Terminals: Quick Connect
Contact Material: Silver Nickel
Contact Voltage VAC: 30V
Contact Voltage VDC: 36V
Contact Configuration: DPDT

Delivery and price
Units per pack	10
Price	64.9 €
Current stock	10+
Lead time	30 days

Datasheet

https://www.phoenixcontact.com/in/products/2900350 

## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

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 for railway applications, consisting of basic terminal block with push-in connection and plugin miniature relay with multi-layer gold contact, range: 0.7 x UN to 1.25 x UN, temperature class TX: -40°C to +70°C, 2 PDTs, input voltage 72 V DC 

## Your advantages 

- Optimum relay operation thanks to wide-range electronics 

- Safe isolation according to DIN EN 50178 between coil and contact 

- Vibration and shock resistance according to EN 50155 

- Certified according to EN 50155 

- Spring-cage and Push-in connection technology 

Input voltage range of 0.7 to 1.25 x UN (1.4 x UN briefly) 

Temperature range from -40°C to +70°C (+85°C briefly) 

a H Key Commercial Data Packing unit ~~eee~~ 10 pc GTIN ~~eT Pee~~ GTIN 4046356510080 Weight per Piece (excluding packing) 60.490 g Custom tariff number 85364900 ~~—————————————————— [0~~ Country of origin ~~Psee~~ Germany 

## Technical data 

## Note 

EMC: class A product, see manufacturer's declaration in the download Utilization restriction area 

## Dimensions 

|Width|14 mm|14 mm|
|---|---|---|
|Height|80 mm|80 mm|
|Depth|94 mm|94 mm|



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## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

## Technical data 

## Ambient conditions 

Ambient temperature (operation) -40 °C ... 70 °C (Temperature class TX) Ambient temperature (storage/transport) -40 °C ... 85 °C Coil side Nominal input voltage UN 72 V DC Typical input current at UN 6 mA Typical response time 5 ms Typical release time 11 ms Coil voltage 48 V DC Protective circuit Bridge rectifier Bridge rectifier Free-wheeling diode Damping diode Surge protection RCZ filter Wide-range electronics Operating voltage display Yellow LED Power dissipation for nominal condition 0.43 W ~~_~~ Contact side Contact type 2 PDT Type of switch contact Single contact Contact material AgNi, hard gold-plated Maximum switching voltage 30 V AC 36 V DC Minimum switching voltage 100 mV (at 10 mA) Min. switching current 1 mA (at 24 V) Maximum inrush current 50 mA Limiting continuous current 50 mA Interrupting rating (ohmic load) max. 1.2 W (at 24 V DC) ~~—i-~~ Contact side (with destroyed gold layer) Note the following values are applicable if a gold layer is destroyed 250 V AC/DC (Separating plate PLC-ATP must be installed for voltages Maximum switching voltage larger than 250 V (L1, L2, L3) between identical terminal blocks in adjacent modules.) Minimum switching voltage 12 V AC/DC Limiting continuous current 6 A Maximum inrush current 15 A (300 ms) Min. switching current 10 mA Interrupting rating (ohmic load) max. 140 W (at 24 V DC) 100 W (at 48 V DC) 60 W (at 60 V DC) 44 W (at 110 V DC) 60 W (at 220 V DC) ~~=~~ 12/28/2018   Page 2 / 11 

https://www.phoenixcontact.com/in/products/2900350 

## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

## Technical data 

|Contact side (with destroyed gold layer)|
|---|
|1500 VA (for 250 V AC)<br>Switching capacity<br>2 A (at 24 V, DC13)<br>0.2 A (at 110 V, DC13)<br>0.2 A (at 250 V, DC13)<br>2 A (at 24 V, AC15)<br>2 A (at 120 V, AC15)<br>2 A (at 250 V, AC15)<br>~~SS~~|
|Connection data input side|
|Connection name<br>Coil side<br>Connection method<br>Push-in connection<br>Stripping length<br>8 mm<br>Conductor cross section solid<br>0.14 mm² ... 2.5 mm²<br>Conductor cross section flexible<br>0.14 mm² ... 2.5 mm²<br>0.2 mm² ... 2.5 mm² ()<br>2x 0.5 mm² ... 1 mm² ()<br>Conductor cross section AWG<br>26 ... 14<br>~~SSS~~|
|Connection data output side|
|Connection name<br>Contact side<br>Connection method<br>Push-in connection<br>Stripping length<br>8 mm<br>Conductor cross section solid<br>0.14 mm² ... 2.5 mm²<br>Conductor cross section flexible<br>0.14 mm² ... 2.5 mm²<br>0.2 mm² ... 2.5 mm² ()<br>2x 0.5 mm² ... 1 mm² ()<br>Conductor cross section AWG<br>26 ... 14<br>~~SSS~~|
|General|
|Test voltage relay winding/relay contact<br>5 kVrms(50 Hz, 1 min.)<br>Test voltage PDT/PDT<br>2.5 kVrms(50 Hz, 1 min.)<br>Operating mode<br>100% operating factor<br>Degree of protection<br>RT III (Relay)<br>IP20 (Relay base)<br>Mechanical service life<br>approx. 3x 10<br>7cycles<br>Mounting position<br>any<br>Assembly instructions<br>In rows with zero spacing<br>~~aa~~|
|Standards and Regulations|
|Connection in acc. with standard<br>CUL<br>Standards/regulations<br>EN 50155 (VDE 0115 part 200)<br>EN 50178<br>EN 61373<br>~~==>~~|



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https://www.phoenixcontact.com/in/products/2900350 

## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

## Technical data 

## Standards and Regulations 

||EN 50121|
|---|---|
|Rated insulation voltage|250 V AC|
|Rated surge voltage|6 kV|
|Insulation|Basic insulation|
|Degree of pollution|2|
|Overvoltage category|III|
|Flammability rating according to UL 94|V0|



## Environmental Product Compliance 

|China RoHS|Environmentally Friendly Use Period = 50|
|---|---|
||For details about hazardous substances go to tab “Downloads”,<br>Category “Manufacturer's declaration”|



## Drawings 

Diagram 

Diagram 

**==> picture [434 x 150] intentionally omitted <==**

**----- Start of picture text -----**<br>
107<br>20<br>10<br>2 6 Reelin— 106 ———Ai | | | | {| | {| |_|<br>4 1<br>NN 2 HH SSS 1<br>BSN SS<br>e  NIA 1 4 3 2 105 “NESS 2 PP<br>0,5<br>= T~ = a a A CC<br>0,3<br>0,2<br>0,1 ee DN 1040 | 1 | 2 | | 3 4 | 5 | 6 | | 7 ft 8 7 9 10<br>10 20 30 50 70 100 200 300<br>Switching voltage [V] Switching current [A] ——— ><br>1 AC, ohmic load 1 250 V AC, ohmic load (DC coils)<br>2 DC, ohmic load, contacts in series 2 250 V AC, ohmic load (AC coils)<br>3 DC, ohmic load<br>4 DC, L/R = 40 ms<br>Cycles<br>**----- End of picture text -----**<br>


Electrical service life 

Interrupting rating 

Circuit diagram 

**==> picture [148 x 83] intentionally omitted <==**

**----- Start of picture text -----**<br>
21<br>24<br>22<br>A2 O 11<br>A1 : 14<br>12<br>**----- End of picture text -----**<br>


## Classifications 

## eCl@ss 

eCl@ss 5.0 27371601 

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https://www.phoenixcontact.com/in/products/2900350 

## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

## Classifications 

|eCl@ss<br>eCl@ss 5.1<br>27371600<br>eCl@ss 6.0<br>27371600<br>eCl@ss 7.0<br>27371601<br>eCl@ss 8.0<br>27371601<br>eCl@ss 9.0<br>27371601<br>~~SSS~~|
|---|
|ETIM<br>ETIM 2.0<br>EC001437<br>ETIM 3.0<br>EC001437<br>ETIM 4.0<br>EC001437<br>ETIM 5.0<br>EC001437<br>ETIM 6.0<br>EC001437<br>~~SSS~~|
|UNSPSC<br>UNSPSC 6.01<br>30211916<br>UNSPSC 7.0901<br>39121515<br>UNSPSC 11<br>39121515<br>UNSPSC 12.01<br>39121515<br>UNSPSC 13.2<br>39122334<br>~~SSS~~|
|Approvals|



## Approvals 

## Approvals 

DNV GL / UL Listed / UL Recognized / cUL Recognized / cUL Listed / EAC / RC FRT / cULus Recognized / cULus Listed 

## Ex Approvals 

Approval details 

DNV GL http://exchange.dnv.com/tari/ TAE0000196-01  ~~oo~~ UL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 172140  ~~ee~~ 

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## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

Approvals 

> 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 cUL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 172140  ~~ee~~ RU C- EAC DE.A*30.B.01082  ~~oo~~ RC FRT B.00094  

> cULus Recognized  ~~ee~~ cULus Listed  ~~oo~~ Accessories Accessories 

## Bridge 

Continuous plug-in bridge - FBST 500-PLC RD - 2966786 

Continuous plug-in bridge, length: 500 mm, color: red 

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## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

## Accessories 

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 

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 

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https://www.phoenixcontact.com/in/products/2900350 

## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

## Accessories 

Single plug-in bridge - FBST 8-PLC GY - 2967688 

~~SB~~ Single plug-in bridge, length: 8 mm, number of positions: 2, color: gray Single plug-in bridge - FBST 14-PLC BK - 2967691 ~~Op~~ Single plug-in bridge, length: 14 mm, number of positions: 2, color: black DIN rail 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 

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## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

## Accessories 

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 

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 

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 

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https://www.phoenixcontact.com/in/products/2900350 

## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

## Accessories 

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 

## 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 

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https://www.phoenixcontact.com/in/products/2900350 

## Relay Module - PLC-RPT- 72UC/21-21AU/RW - 2900350 

## Accessories 

## 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 

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 

Marker for terminal blocks - UC-TM 12 - 0819194 

Marker for terminal blocks, Sheet, white, unlabeled, can be labeled with: BLUEMARK ID COLOR, BLUEMARK ID, BLUEMARK CLED, PLOTMARK, CMS-P1-PLOTTER, mounting type: snap into tall marker groove, for terminal block width: 12 mm, lettering field size: 11.45 x 10.5 mm 

## Marker for terminal blocks - UCT-TM 12 - 0829144 

Marker for terminal blocks, Sheet, white, unlabeled, can be labeled with: TOPMARK NEO, TOPMARK LASER, BLUEMARK ID COLOR, BLUEMARK ID, BLUEMARK CLED, THERMOMARK PRIME, THERMOMARK CARD 2.0, THERMOMARK CARD, mounting type: snap into tall marker groove, for terminal block width: 12 mm, lettering field size: 10.8 x 9.6 mm 

## Spare parts 

Single relay - REL-MR- 48DC/21-21AU - 2834847 

Plug-in miniature power relay, with multi-layer gold contact, 2 PDTs, input voltage 48 V DC 

Phoenix Contact 2018 © - 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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