Image not available
Illustrative purposes only
2904954
Safety Relay, 24 VDC, SPST-NO, PSRmini Series, DIN Rail, 6 A, Screw
⚠️ 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: Safety Relays
- SVHC: Lead (04-Feb-2026)
- IP Rating: IP20, IP54
- Coil Voltage: 24VDC
- Product Range: PSRmini Series
- Relay Mounting: DIN Rail
- Contact Current: 6A
- Relay Terminals: Screw
- Contact Material: Silver Tin Oxide
- Contact Configuration: SPST-NO
- Contact Voltage AC Nom: 250V
- Contact Voltage DC Nom: 250V
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 135.79 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
https://www.phoenixcontact.com/pi/products/2904954 ## Safety relays - PSR-MS40-1NO-1DO-24DC-SC - 2904954 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) Safety relay for emergency stop and safety doors up to SILCL 3, Cat. 4, PL e, 1 or 2-channel operation, automatic start, 1 enabling current path, US = 24 V DC, fixed screw terminal block ## Your advantages Up to Cat.4/PL e according to ISO 13849-1, SILCL 3 according to IEC 62061 Low housing width of just 6.8 mm - Two-channel control - 1 enabling current path, 1 digital signal output Automatic activation ## Key Commercial Data Packing unit 1 pc ~~a Ge~~ GTIN 4046356905039AIM ~~Pe UCI eG~~ GTIN 4046356905039 ## Technical data ## Note EMC: class A product, see manufacturer's declaration in the download Utilization restriction area ## Dimensions |Width|6.8 mm| |---|---| |Height|93.1 mm| |Depth|102.5 mm| |Ambient conditions|| |Ambient temperature (operation)|-40 °C ... 60 °C (observe derating)| |Ambient temperature (storage/transport)|-40 °C ... 85 °C| |Max. permissible relative humidity (operation)|75 % (on average, 85% infrequently, non-condensing)| 05/16/2019 Page 1 / 6 https://www.phoenixcontact.com/pi/products/2904954 ## Safety relays - PSR-MS40-1NO-1DO-24DC-SC - 2904954 ## Technical data ## Ambient conditions Max. permissible humidity (storage/transport) 75 % (on average, 85% infrequently, non-condensing) Maximum altitude ≤ 2000 m (Above sea level) Power supply Rated control circuit supply voltage US 24 V DC -15 % / +10 % 20.4 V DC ... 26.4 V DC Rated control supply current IS typ. 42 mA Power consumption at US typ. 1 W Inrush current 4.5 A (Δt < 120 µs at Us) Filter time 1 ms (at A1 in the event of voltage dips at Us) Protective circuit Surge protection Suppressor diode Protection against polarity reversal for rated control circuit supply voltage ~~===~~ Digital inputs Input voltage range "0" signal 0 V DC ... 5 V DC (for safe Off; at S12) Input current range "0" signal 0 mA ... 2 mA (for safe Off; at S12) Inrush current < 20 mA (with Us/Ix to S12) < 10 mA (with Us/Ix at the start circuit) < 5 mA (with Us/Ix to S22/Us) > -15 mA (with Us/Ix to S22/0V) Current consumption < 5 mA (with Us/Ix to S12) < 5 mA (with Us/Ix to S22/Us) < 10 mA (with Us/Ix at the start circuit) > -5 mA (with Us/Ix to S22/0V) Filter time max. 1.5 ms (at S12, S22; test pulse width) min. 7.5 ms (at S12, S22; test pulse rate) Test pulse rate = 5 x Test pulse width Voltage at input/start and feedback circuit 24 V DC -15 % / +10 % Max. permissible overall conductor resistance 150 Ω ~~=~~ Relay outputs: enabling current path Output name Enabling current path Output description safety-related N/O contacts Number of outputs 1 (undelayed) Contact type 1 enabling current path Contact material AgSnO2 Switching voltage min. 12 V AC/DC max. 250 V AC/DC (Observe the load curve) Limiting continuous current 6 A (observe derating) Inrush current min. 3 mA max. 6 A ~~-_~~ 05/16/2019 Page 2 / 6 https://www.phoenixcontact.com/pi/products/2904954 ## Safety relays - PSR-MS40-1NO-1DO-24DC-SC - 2904954 |Technical data|| |---|---| |Relay outputs: enabling current path|| |Sq. Total current<br>36 A<br>2(observe derating)<br>Switching capacity<br>min. 60 mW<br>Switching frequency<br>max. 0.5 Hz<br>Mechanical service life<br>10x 10<br>6cycles<br>Output fuse<br>6 A gL/gG (N/O contact)<br>4 A gL/gG (for low-demand applications)<br>~~aa~~|| |Alarm outputs|| |Output description<br>non-safety-related<br>Number of outputs<br>1 (digital, PNP)<br>Voltage<br>22 V DC (Us- 2 V)<br>Current<br>max. 100 mA<br>Maximum inrush current<br>500 mA (Δt = 1 ms at Us)<br>Short-circuit protection<br>no<br>~~aaa~~|| |Times|| |Typical pickup time at US|< 250 ms (when controlled via A1)| |Typical response time at US|< 175 ms| |Typical release time at US|< 20 ms (when controlled via A1 or S12 and S22.)| |Recovery time|< 500 ms| |General|| |Relay type<br>Electromechanical relay with forcibly guided contacts in accordance with<br>IEC/EN 61810-3 (EN 50205)<br>Nominal operating mode<br>100% operating factor<br>Net weight<br>69 g<br>Mounting position<br>vertical or horizontal<br>Mounting type<br>DIN rail mounting<br>Assembly instructions<br>See derating curve<br>Degree of protection<br>IP20<br>Min. degree of protection of inst. location<br>IP54<br>Housing material<br>PBT<br>Housing color<br>yellow<br>Operating voltage display<br>1 x green LED<br>Status display<br>2 x green LEDs<br>~~=~~|| |Connection data|| |Connection method|Screw connection| |pluggable|no| |Conductor cross section solid min.|0.2 mm²| |Conductor cross section solid max.|2.5 mm²| |Conductor cross section flexible min.|0.2 mm²| |Conductor cross section flexible max.|2.5 mm²| 05/16/2019 Page 3 / 6 https://www.phoenixcontact.com/pi/products/2904954 ## Safety relays - PSR-MS40-1NO-1DO-24DC-SC - 2904954 ## Technical data ## Connection data Conductor cross section AWG min. 26 Conductor cross section AWG max. 12 Stripping length 12 mm Screw thread M3 Safety-related characteristic data Stop category 0 Designation IEC 61508 - High demand Safety Integrity Level (SIL) 3 Designation IEC 61508 - Low demand Safety Integrity Level (SIL) 3 Designation EN ISO 13849 Performance level (PL) e (4 A DC13; 5 A AC15; 8760 switching cycles/year) Category 4 Designation EN 62061 Safety Integrity Level Claim Limit (SIL CL) 3 Standards and Regulations Designation Air clearances and creepage distances between the power circuits Standards/regulations DIN EN 50178 Rated insulation voltage 250 V AC 250 V AC Safe isolation, reinforced insulation 6 kV between input circuit and Rated surge voltage/insulation enabling current path Basic insulation 4 kV between all current paths and housing Degree of pollution 2 Overvoltage category III Shock 15g Vibration (operation) 10 Hz ... 150 Hz, 2g Conformance CE-compliant Environmental Product Compliance REACh SVHC Lead 7439-92-1 China RoHS Environmentally Friendly Use Period = 50 For details about hazardous substances go to tab “Downloads”, Category “Manufacturer's declaration” ~~==[=]~~ Drawings 05/16/2019 Page 4 / 6 https://www.phoenixcontact.com/pi/products/2904954 ## Safety relays - PSR-MS40-1NO-1DO-24DC-SC - 2904954 **==> picture [408 x 203] intentionally omitted <==** **----- Start of picture text -----**<br> Block diagram Block diagram<br>A1 S12 S22 S35 13 A1 PSR-MS40 S22 S35 13<br>PSR-MS40 IN K1 1<br>PWR K1/K2 2<br>K2<br>24V DC<br>K1<br>K2<br>A2 M1 14 K1 K2<br>7<br>oo 3 4 r 5 6<br>7<br>A2 S12 M1 14<br>Key:<br>1 = Input circuit<br>2 = Voltage limitation<br>3 = Control circuit channel 1<br>4 = Control circuit signal output<br>**----- End of picture text -----**<br> 5 = Control circuit channel 2 6 = Start channel 1 and 2 7 = Channel 1 K1, K2 = Force-guided elementary relays ## Circuit diagram **==> picture [15 x 4] intentionally omitted <==** **----- Start of picture text -----**<br> 24V DC<br>**----- End of picture text -----**<br> **==> picture [94 x 150] intentionally omitted <==** **----- Start of picture text -----**<br> L<br>K1<br>S1<br>K2<br>A1 S35( ) S12( ) S22( )<br>( ) ( ) ( )<br>PSR-MS40<br>( )<br>A2 M1( )<br>0V N<br>**----- End of picture text -----**<br> **==> picture [133 x 44] intentionally omitted <==** **----- Start of picture text -----**<br> A1 S35( ) S12( ) S22( ) 13 K1<br>PSR-MS40<br>A2 M1( ) 14 K2<br>M<br>K1<br>**----- End of picture text -----**<br> **==> picture [6 x 3] intentionally omitted <==** **----- Start of picture text -----**<br> K2<br>**----- End of picture text -----**<br> ## Approvals ## Approvals ## Approvals UL Listed / cUL Listed / Functional Safety / UL Listed / cUL Listed / Functional Safety / EAC / EAC Ex Approvals ## Approval details 05/16/2019 Page 5 / 6 https://www.phoenixcontact.com/pi/products/2904954 ## Safety relays - PSR-MS40-1NO-1DO-24DC-SC - 2904954 Approvals UL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324 ~~oo~~ cUL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324 Functional Safety 44-205-13755202 ~~ee~~ UL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324 ~~oo~~ cUL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324 Functional Safety 44-205-13755202 ~~ee~~ RU C- EAC DE.A*30.B.01082 ~~oo~~ RU C- EAC DE.A*30.B.01082 Phoenix Contact 2019 © - all rights reserved http://www.phoenixcontact.com PHOENIX CONTACT GmbH & Co. KG Flachsmarktstr. 8 32825 Blomberg Germany Tel. +49 5235 300 Fax +49 5235 3 41200 http://www.phoenixcontact.com 05/16/2019 Page 6 / 6
Updated at April 29, 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.
About Novapart
Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.
Learn more →Stock Shortage Specialist
When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.
Request a quote →Compliant Alternatives
We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.
BOM Analysis service →