# Relay Accessory, Relay Plug, ST-REL3 Series
**URL**: https://novapart.co/products/2824255/relay-accessory-plug-st-rel3-series
**SKU**: 2824255
**Manufacturer**: PHOENIX CONTACT
**Category**: Switches & Relays || Relays || Relay Accessories || Other Relay Accessories
**Price**: €86.4300
**Stock**: 10+
**Lead Time**: 134 days (indicative)
## Specifications
| Parameter | Value |
|---|---|
| Svhc | Lead (04-Feb-2026) |
| For Use With | - |
| Product Range | ST-REL3 Series |
| Accessory Type | Relay Plug |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3293353/)
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
EMC: class A product, see manufacturer's declaration in the download
area
~~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
24 V DC
~~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
2.5 kV
Pollution degree
2
Overvoltage category
II
Designation
Air clearances and creepage distances between the power circuits
Standards/regulations
DIN EN 50178
Insulation
Basic insulation
~~ee~~|
|Environmental Product Compliance|
|Lead 7439-92-1
China RoHS
Environmentally Friendly Use Period = 50
For details about hazardous substances go to tab “Downloads”,
Category “Manufacturer's declaration”
~~————~~|
|Classifications|
|eCl@ss
eCl@ss 4.0
27371100
eCl@ss 4.1
27371100
eCl@ss 5.0
27371600
eCl@ss 5.1
27371600
eCl@ss 6.0
27371600
eCl@ss 7.0
27371601
eCl@ss 8.0
27371601
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
ETIM 7.0
EC001437
~~a~~|
|UNSPSC
UNSPSC 6.01
30211916
UNSPSC 7.0901
39121515
UNSPSC 11
39121515
UNSPSC 12.01
39121515
UNSPSC 13.2
39122334
UNSPSC 18.0
39122334
UNSPSC 19.0
39122334
UNSPSC 20.0
39122334
~~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
## Links
- [View this product on Novapart](https://novapart.co/products/2824255/relay-accessory-plug-st-rel3-series)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/phoenix-contact/st-rel3-sg-b-24-21-p/relay-plug/dp/3293353)
---
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