# Power Relay, SPDT, 24 VDC, 50 mA, PLC-INTERFACE Series, DIN Rail

![Product image](https://novapart.co/image/farnell:3252402/)

**URL**: https://novapart.co/products/2900321/power-relay-spdt-24-vdc-50-ma-plc-interface-series
**SKU**: 2900321
**Manufacturer**: PHOENIX CONTACT
**Category**: Switches & Relays || Relays || Power Relays
**Price**: €39.1800
**Stock**: 10+
**Lead Time**: 36 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | Lead (04-Feb-2026) |
| Coil Type | - |
| Coil Voltage | 24VDC |
| Product Range | PLC-INTERFACE Series |
| Relay Mounting | DIN Rail |
| Coil Resistance | - |
| Contact Current | 50mA |
| Relay Terminals | Quick Connect |
| Contact Material | Silver Tin Oxide |
| Contact Voltage Vac | 30V |
| Contact Voltage Vdc | 36V |
| Contact Configuration | SPDT |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3252402/)

https://www.phoenixcontact.com/us/products/2900321 

## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

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 plug-in 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, 1 PDT, input voltage 24 V DC 

The illustration shows the version PLC-RSP-24UC/21/RW 

## Product Features 

Optimum relay operation thanks to wide-range electronics 

Certified according to EN 50155 

Vibration and shock resistance according to EN 50155 

Safe isolation according to DIN EN 50178 between coil and contact 

Spring-cage and Push-in connection technology 

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

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

## Key commercial data 

|Temperature range from -40°C to +70°C (+85°C briefly)<br>Input voltage range of 0.7 to 1.25 x UN (1.4 x UN briefly)<br>Key commercial data<br>@A",||
|---|---|
|Packing unit|1 pc|
|Weight per Piece (excluding packing)|33.74 GRM|
|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<br>6.2 mm<br>Height<br>80 mm<br>~~,-!_——~~||



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## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

## Technical data 

## Dimensions 

|Ambient temperature (operation)<br>Ambient temperature (storage/transport)<br>Coil side<br>~~ee~~|-40 °C ... 70 °C (Temperature class TX)<br>-40 °C ... 85 °C<br>~~ee~~|
|---|---|
|Nominal input voltage UN|24 V DC|
|Input voltage range in reference to UN|0.7 ... 1.25|
|Typical input current at UN|9 mA|
|Typical response time|4 ms|
|Typical release time|4 ms|
|Operating voltage display|Yellow LED|
|Protective circuit|Bridge rectifier Bridge rectifier|
||Free-wheeling diode Damping diode|
||Surge protection|
||RCZ filter|
||Wide-range electronics|



## Contact side 

|Contact side|Free-wheeling diode Damping diode<br>Surge protection<br>RCZ filter<br>Wide-range electronics|
|---|---|
|Contact type|1 PDT|
|Contact material|AgSnO, hard gold-plated|
|Maximum switching voltage|30 V AC|
||36 V DC|
|Minimum switching voltage|100 mV (at 10 mA)|
|Maximum inrush current|50 mA|
|Min. switching current|1 mA (at 24 V)|
|Limiting continuous current|50 mA|
|Interrupting rating (ohmic load) max.|1.2 W (at 24 V DC)|
|Switching capacity in acc. with DIN VDE 0660/IEC 60947|1 A (24 V (DC13))|
||0.2 A (110 V (DC13))|
||0.1 A (220 V (DC13))|
||3 A (24 V (AC15))|
||3 A (120 V (AC15))|
||3 A (230 V (AC 15))|
|Note|the following values are applicable if a gold layer is destroyed|
|Maximum switching voltage|250 V AC/DC (Separating plate PLC-ATP must be installed for voltages<br>larger than 250 V (L1, L2, L3) between identical terminal blocks in adjacent<br>modules.)|



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https://www.phoenixcontact.com/us/products/2900321 

## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

## Technical data 

## Contact side 

|Contact side||
|---|---|
|Minimum switching voltage|12 V AC/DC|
|Limiting continuous current|6 A|
|Min. switching current|10 mA|
|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|0.1 A (at 220 V, DC13)<br>3 A (at 24 V, AC15)<br>3 A (at 120 V, AC15)<br>3 A (at 230 V, AC15)|
|---|---|
|Test voltage relay winding/relay contact|4 kVrms(50 Hz, 1 min.)|
|Operating mode|100% operating factor|
|Degree of protection|RT III (Relay)|
||IP20 (Relay socket)|
|Mechanical service life|Approx. 2 x 10<br>7cycles|
|Inflammability class according to UL 94|V0|
|Standards/regulations|EN 50155 (VDE 0115 part 200)|
||EN 50178|
||IEC 62103|
||EN 61373|
||EN 50121|
|Rated surge voltage / insulation|6 kV|
|Rated insulation voltage|250 V AC|
|Pollution degree|2|
|Surge voltage category|III|
|Mounting position|any|
|Assembly instructions|In rows with zero spacing|



## Connection data 

|Connection method|Push-in connection|
|---|---|
|Stripping length|8 mm|



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## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

## Technical data 

|Technical data||
|---|---|
|Connection data||
|Conductor cross section stranded min.<br>0.14 mm²<br>Conductor cross section stranded max.<br>2.5 mm²<br>Conductor cross section solid min.<br>0.14 mm²<br>Conductor cross section solid max.<br>2.5 mm²<br>Conductor cross section AWG/kcmil max<br>14<br>Conductor cross section AWG/kcmil min.<br>26<br>~~SSS~~||
|Classifications||
|eCl@ss<br>eCl@ss 4.0<br>27371001<br>eCl@ss 4.1<br>27371001<br>eCl@ss 5.0<br>27371001<br>eCl@ss 5.1<br>27371001<br>eCl@ss 6.0<br>27371001<br>eCl@ss 7.0<br>27371001<br>eCl@ss 8.0<br>27371001<br>~~ee~~||
|ETIM||
|ETIM 4.0|EC000196|
|ETIM 5.0|EC000196|
|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>39121515<br>~~—~~||
|Approvals||
|Approvals||



## Approvals 

UL Listed / cUL Listed / UL Recognized / cUL Recognized / GL / cUL Listed / cULus Recognized / cULus Listed / cULus Listed / cULus Listed / null / null / null / null 

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https://www.phoenixcontact.com/us/products/2900321 

## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

## Approvals 

Ex Approvals 

Approvals submitted 

## Approval details 

UL Listed 

cUL Listed UL Recognized 

cUL Recognized 

GL ~~PT~~ cUL Listed cULus Recognized cULus Listed 

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## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

Approvals 

cULus Listed 

cULus Listed ~~CT~~ 

~~CO CT CT~~ 

## 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 

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https://www.phoenixcontact.com/us/products/2900321 

## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

## Accessories 

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 

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

Single plug-in bridge, Length: 8 mm, Number of positions: 2, Color: gray 

Labeled terminal marker 

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https://www.phoenixcontact.com/us/products/2900321 

## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

## Accessories 

Zack marker strip - ZB 6,LGS:FORTL.ZAHLEN - 1051016 

Zack marker strip, Strip, white, labeled, can be labeled with: Plotter, Printed horizontally: Consecutive numbers 1 - 10, 11 - 20, etc. up to 491 - 500, Mounting type: Snap into tall marker groove, for terminal block width: 6.2 mm, Lettering field: 6.15 x 10.5 mm 

## Mounting rail 

DIN rail, unperforated - NS 35/ 7,5 V2A UNPERF 2000MM - 0801377 

DIN rail, unperforated, Width: 35 mm, Height: 7.5 mm, Length: 2000 mm, Color: silver 

DIN rail perforated - NS 35/ 7,5 PERF 2000MM - 0801733 

DIN rail, material: steel galvanized and passivated with a thick layer, perforated, height 7.5 mm, width 35 mm, length: 2000 mm 

DIN rail, unperforated - NS 35/ 7,5 CU UNPERF 2000MM - 0801762 

DIN rail, material: Copper, unperforated, height 7.5 mm, width 35 mm, length: 2 m 

DIN rail, unperforated - NS 35/15 UNPERF 2000MM - 1201714 

DIN rail, material: Steel, unperforated, height 15 mm, width 35 mm, length: 2 m 

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## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

## Accessories 

DIN rail, unperforated - NS 35/15 CU UNPERF 2000MM - 1201895 

DIN rail, material: Copper, unperforated, 1.5 mm thick, height 15 mm, width 35 mm, length: 2 m 

DIN rail, unperforated - NS 35/15-2,3 UNPERF 2000MM - 1201798 

DIN rail, material: Steel, unperforated, 2.3 mm thick, height 15 mm, width 35 mm, length: 2 m 

DIN rail, unperforated - NS 35/15 AL UNPERF 2000MM - 1201756 

DIN rail, deep drawn, high profile, unperforated, 1.5 mm thick, material: aluminum, height 15 mm, width 35 mm, length 2000 mm 

DIN rail perforated - NS 35/15 PERF 2000MM - 1201730 

DIN rail, material: steel galvanized and passivated with a thick layer, perforated, height 15 mm, width 35 mm, length: 2000 mm 

DIN rail, unperforated - NS 35/ 7,5 UNPERF 2000MM - 0801681 

DIN rail, material: Steel, unperforated, height 7.5 mm, width 35 mm, length: 2 m 

Partition plate 

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https://www.phoenixcontact.com/us/products/2900321 

## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

## Accessories 

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 - ZB 6:UNBEDRUCKT - 1051003 

Zack marker strip, Strip, white, unlabeled, can be labeled with: Plotter, Mounting type: Snap into tall marker groove, for terminal block width: 6.2 mm, Lettering field: 6.15 x 10.5 mm 

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## Relay Module - PLC-RPT- 24UC/21AU/RW - 2900321 

## Accessories 

Zack marker strip - ZB 6/WH-100:UNBEDRUCKT - 5060935 

Zack marker strip, Strip, white, unlabeled, can be labeled with: Plotter, Mounting type: Snap into tall marker groove, for terminal block width: 6.2 mm, Lettering field: 6.15 x 10.5 mm 

## Drawings 

Diagram 

Diagram 

**==> picture [172 x 109] intentionally omitted <==**

**----- Start of picture text -----**<br>
106 1<br>eee Lt<br>a<br>105 Se<br>104 ee<br>0 2 4 6 8<br>Switching current [A] ———><br>1 250 V AC, ohmic load<br>Cycles<br>**----- End of picture text -----**<br>


**==> picture [175 x 120] intentionally omitted <==**

**----- Start of picture text -----**<br>
20<br>10 | | Ty<br>6<br>=== 4 ==<br>5 2 a a<br>2 1 LIN<br>0,5 1<br>0,3<br>oT 0,2<br>0,1 ee ee eeeee<br>10 20 30 50 Switching 70 100  voltage [V] 200 300<br>1 ohmic load<br>**----- End of picture text -----**<br>


Electrical service life 

DC interrupting rating 

Circuit diagram 

**==> picture [112 x 43] intentionally omitted <==**

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


Phoenix Contact 2014 © - all rights reserved http://www.phoenixcontact.com 

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## Links

- [View this product on Novapart](https://novapart.co/products/2900321/power-relay-spdt-24-vdc-50-ma-plc-interface-series)
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- [Supplier page](https://es.farnell.com/phoenix-contact/plc-rpt-24uc-21au-rw/power-rly-spdt-24vdc-0-05a-din/dp/3252402)
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