2824255
Relay Accessory, Relay Plug, ST-REL3 Series
- Manufacturer: PHOENIX CONTACT
- Product type: Other Relay Accessories
- SVHC: Lead (04-Feb-2026)
- For Use With: -
- Product Range: ST-REL3 Series
- Accessory Type: Relay Plug
| Delivery and price | |
|---|---|
| Units per pack | 10 |
| Price | 86.43 € |
| Current stock | 10+ |
| Lead time | 30 days |
https://www.phoenixcontact.com/gb/products/2824255 ## Relay connectors - ST-REL3-SG-B 24/21/P - 2824255 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) Relay plug, fitted with latching miniature switching relay, contacts (AgSnO): small to large loads, 1 PDT, 24 V DC input voltage, with protection against polarity reversal and freewheeling diode, positive switching The figure shows version ST-REL3SG-B 24/21/M ## Key Commercial Data ~~eG~~ Packing unit 10 pc GTIN ~~AOE~~ GTIN 4017918077631 ~~**a** Qe~~ Weight per Piece (excluding packing) 34.130 g Custom tariff number 85364190 ~~a a~~ Country of origin Germany ~~a~~ Note ~~GO~~ Made to Order (non-returnable) ## Technical data Note |Note|Note| |---|---| |Utilization restriction<br>EMC: class A product, see manufacturer's declaration in the download<br>area<br>~~es~~|| |Dimensions|| |Width|20.8 mm| |Height|33 mm| |Depth|66.5 mm| |Ambient conditions|| |Ambient temperature (operation)|-40 °C ... 50 °C| |Ambient temperature (storage/transport)|-40 °C ... 70 °C| |Coil side|| |Nominal input voltage UN<br>24 V DC<br>~~a~~|| 02/27/2020 Page 1 / 5 https://www.phoenixcontact.com/gb/products/2824255 ## Relay connectors - ST-REL3-SG-B 24/21/P - 2824255 ## Technical data ## Coil side Input voltage range in reference to UN 0.8 ... 1.1 Typical input current at UN typ. 8 mA Typical response time 5 ms Typical release time 5 ms Coil voltage 24 V DC Protective circuit Free-wheeling diode Damping diode Reverse polarity protection Polarity protection diode Pulse time range 30 ms ... 5 s Power dissipation for nominal condition 0.19 W Contact side Contact type Single contact, 1-PDT Type of switch contact Single contact Contact material AgSnO Maximum switching voltage 250 V AC/DC Minimum switching voltage 5 V (At 5 V) 24 V (at 24 V) Min. switching current 1 mA (at 24 V) 100 mA (At 5 V) Maximum inrush current 8 A Limiting continuous current 6 A Interrupting rating (ohmic load) max. 144 W (at 24 V DC) 43 W (at 48 V DC) 42 W (at 60 V DC) 55 W (at 110 V DC) 100 W (at 220 V DC) 1500 VA (for 250 V AC) General Test voltage relay winding/relay contact 2 kVrms (50 Hz, 1 min.) Operating mode 100% operating factor Mechanical service life approx. 107 cycles Mounting position any Assembly instructions In rows with zero spacing Standards and Regulations Standards/regulations IEC 60664 IEC 60664A DIN VDE 0110 DIN VDE 0109-11, draft DIN EN 50178/VDE 0160 (in relevant parts) ~~[==]~~ Rated insulation voltage 250 V AC ~~Se~~ 02/27/2020 Page 2 / 5 https://www.phoenixcontact.com/gb/products/2824255 ## Relay connectors - ST-REL3-SG-B 24/21/P - 2824255 ## Technical data |Standards and Regulations| |---| |Rated surge voltage<br>2.5 kV<br>Pollution degree<br>2<br>Overvoltage category<br>II<br>Designation<br>Air clearances and creepage distances between the power circuits<br>Standards/regulations<br>DIN EN 50178<br>Insulation<br>Basic insulation<br>~~ee~~| |Environmental Product Compliance| |Lead 7439-92-1<br>China RoHS<br>Environmentally Friendly Use Period = 50<br>For details about hazardous substances go to tab “Downloads”,<br>Category “Manufacturer's declaration”<br>~~————~~| |Classifications| |eCl@ss<br>eCl@ss 4.0<br>27371100<br>eCl@ss 4.1<br>27371100<br>eCl@ss 5.0<br>27371600<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>~~==~~| |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>ETIM 7.0<br>EC001437<br>~~a~~| |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>UNSPSC 18.0<br>39122334<br>UNSPSC 19.0<br>39122334<br>UNSPSC 20.0<br>39122334<br>~~a~~| |02/27/2020 Page 3 / 5| https://www.phoenixcontact.com/gb/products/2824255 ## Relay connectors - ST-REL3-SG-B 24/21/P - 2824255 ## Classifications ## UNSPSC UNSPSC 21.0 39122334 ## Approvals ## Approvals Approvals EAC / EAC Ex Approvals ## Approval details EAC TR_TS_D_00573_c RU*CEAC DE.*08.B.00010 ## Accessories ## Additional products Basic terminal block - URELG 3-PMTK - 2820709 Basic termination blocks with test connection on both sides and knife disconnection for NS 32 and NS 35/7.5 DIN rail, with end cover, for ST-REL..., ST-OV... and ST-OE... plugs, 3-pos. ## Basic terminal block - UDK-RELG 3 - 2777043 Basic termination blocks with test connection on both sides and double connections with the same potential for NS 32 and NS 35/7.5 DIN rail, with end cover, for ST-REL..., ST-OV... and ST-OE... plugs, 3-pos. 02/27/2020 Page 4 / 5 https://www.phoenixcontact.com/gb/products/2824255 ## Relay connectors - ST-REL3-SG-B 24/21/P - 2824255 ## Accessories Basic terminal block - URELG 3 - 2820136 Basic termination blocks with screw connection for NS 32 and NS 35/7.5 DIN rail, with end cover, for ST-REL..., STOV... and ST-OE... plugs, 3-pos. ## Basic terminal block - ZFK-RELG 3 - 2829917 Basic termination blocks with spring-cage connection for NS 35/7.5 DIN rail, with end cover, for ST-REL..., ST-OV... and ST-OE... plugs, 3-pos. Phoenix Contact 2020 © - all rights reserved http://www.phoenixcontact.com 02/27/2020 Page 5 / 5
Updated at June 7, 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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