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2702523
Safety Relay, 24 VDC, SPST-NO, SPST-NC, PSRmini Series, DIN Rail, 3 A, Spring Cage
⚠️ 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: 3A
- Relay Terminals: Spring Cage
- Contact Material: Silver Nickel
- Contact Configuration: SPST-NO, SPST-NC
- Contact Voltage AC Nom: 250V
- Contact Voltage DC Nom: 125V
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 313.56 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
https://www.phoenixcontact.com/gb/products/2702523 ## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523 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) Coupling relay for electrical isolation and power adaptation for SIL 3 F&G applications, low demand, load diagnostics in the Off and On state for open circuit and short circuit, 1 enabling current path, test pulse filter, pluggable Push-in terminal block, width: 17.5 mm The figure shows a version with a screw connection ## Your advantages Suitable for low-demand applications up to SIL 3 according to IEC 61508, IEC 61511, and EN 50156 - Earth leakage monitoring - Configurable Off and On state diagnostics - Active error acknowledgment via A1 at DO - Integrated DCS test pulse filter - 1 enabling current path, 1 signaling current path - Time saving push-in connection, tools not required Potentials can be easily looped through – ideal for BUS applications - Intuitive use through colour coded actuation lever Can be combined with the MSTB 2,5 range Quick and convenient testing using integrated test option Key Commercial Data ~~Ge~~ Packing unit 1 pc GTIN 4°055626°283371 ~~fe UNNNT~~ GTIN 4055626283371 ~~a G~~ Weight per Piece (excluding packing) 147.480 g ~~Ge GO~~ Custom tariff number 85364190 ~~Ce~~ Country of origin Germany ## Technical data Note 12/30/2019 Page 1 / 6 https://www.phoenixcontact.com/gb/products/2702523 ## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523 ## Technical data |Technical data|| |---|---| |Note|| |Utilization restriction<br>EMC: class A product, see manufacturer's declaration in the download<br>area<br>~~ee~~|| |Dimensions|| |Width<br>17.5 mm<br>Height<br>117.4 mm<br>Depth<br>114.5 mm<br>~~———~~|| |Ambient conditions|| |Ambient temperature (operation)|-25 °C ... 60 °C (observe derating)| |Ambient temperature (storage/transport)|-40 °C ... 65 °C| |Max. permissible relative humidity (operation)|75 % (on average, 85% infrequently, non-condensing)| |Max. permissible humidity (storage/transport)|75 % (on average, 85% infrequently, non-condensing)| |Air pressure (operation)|79 kPa ... 106 kPa| |Air pressure (storage/transport)|79 kPa ... 106 kPa| |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. 75 mA| |Power consumption at US|typ. 2 W (at US/UD; On state)| |Inrush current|max. 100 mA| |Filter time|2 ms (at A1-A2 in the event of voltage dips at Us)| ||max. 2 ms (at A1-A2; low test pulse width)| ||≥ 100 ms (at A1-A2; low test pulse rate)| ||max. 17 ms (at A1-A2; high test pulse width)| ||≥ 800 ms (at A1-A2; high test pulse rate)| |Diagnostic supply voltage UD|24 V DC -20 % / +25 %| |Input current at UD|35 mA (at UD= 24 V)| ||45 mA (at UD= 19 V)| ||25 mA (at UD= 30 V)| |Inrush current at UD|1.5 A (Δt < 10 µs)| |Power consumption at UD|typ. 0.9 W (at UD; Off state)| |Protective circuit|Surge protection 36 V suppressor diode (A1-A2)33 V suppressor diode<br>(24V-GND)| ||Polarity reversal protection for rated control circuit supply voltage and| ||diagnostic supply voltage| |Digital inputs|| |Description of the input<br>Test point for proof test<br>Number of inputs<br>3<br>Inrush current<br>typ. 200 mA<br>~~_———~~|| 12/30/2019 Page 2 / 6 https://www.phoenixcontact.com/gb/products/2702523 ## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523 ## Technical data ## Digital inputs Current consumption typ. 20 mA (Input TP1) typ. 20 mA (Input TP2) typ. 30 mA (Input TP3) Type of protection Surge protection Protective circuit/component 36 V suppressor diode 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 AgNi, gold-flashed, Ag alloy Switching voltage min. 16 V AC/DC max. 250 V AC max. 125 V DC Limiting continuous current 3 A (Observe derating, load type, and on-load voltage) Inrush current min. 50 mA max. 5 A (Δt 1 s) Sq. Total current 9 A2 (observe derating) Switching capacity min. 1 W Switching frequency max. 0.5 Hz Diagnostic threshold 7 Ω ... 20 kΩ (configurable) Mechanical service life approx. 5x 107 cycles Relay outputs: return current/signaling current path Output name Signaling current path Output description non-safety-related N/C contact Number of outputs 1 (without delay, floating) Contact type 1 signaling current path Inrush current max. 800 mA (Δt 100 ms) Short-circuit protection no ~~a~~ Times Typical pickup time at US typ. 100 ms (when controlled via A1-A2) Typical release time at US typ. 30 ms (when controlled via A1-A2) Recovery time 1 s (when controlled via A1-A2) ~~——=~~ General Relay type Electromechanical relay Nominal operating mode 100% operating factor Net weight 147.48 g Mounting position vertical or horizontal ~~[=]~~ Mounting type DIN rail mounting ~~SSS~~ 12/30/2019 Page 3 / 6 https://www.phoenixcontact.com/gb/products/2702523 ## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523 Technical data General Assembly instructions See derating curve Degree of protection IP20 Min. degree of protection of inst. location IP54 Housing material Frianyl A 63 R V0 Housing color yellow Status display 1 x yellow LED, 1 x green LED, 1 x red LED ~~SSS~~ Connection capacity Connection method Push-in spring connection pluggable Yes Conductor cross section solid 0.2 mm² ... 1.5 mm² Conductor cross section flexible 0.2 mm² ... 1.5 mm² Conductor cross section AWG / kcmil 24 ... 16 Conductor cross section flexible, with ferrule without plastic sleeve 0.25 mm² ... 1.5 mm² (only together with CRIMPFOX 6) Conductor cross section, flexible, with ferrule, with plastic sleeve 0.25 mm² ... 1.5 mm² (only together with CRIMPFOX 6) Stripping length 8 mm Safety-related characteristic data Designation IEC 61508 - Low demand ~~= >=—~~ Safety Integrity Level (SIL) 3 Designation EN 50156-2 Safety Integrity Level (SIL) 3 (Reference IEC 61508) ~~=—SSS>>=~~ Standards and Regulations Designation Air clearances and creepage distances between the power circuits Standards/regulations DIN EN 50178 Rated insulation voltage 250 V AC Rated surge voltage/insulation Basic insulation 4 kV between all current paths and housing Safe isolation, 6 kV reinforced insulation from (A1/A2, 24V/0V, 21/22, and TP1/TP2/TP3) to the enabling current path (L, L', LO, LO', NI, NI', N,N') Degree of pollution 2 Overvoltage category III Shock 15g, 11 ms Vibration (operation) 10 Hz ... 150 Hz, 2g Conformance CE-compliant Environmental simulation test ISA-S71.04 (G3) 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” ~~==~~ 12/30/2019 Page 4 / 6 https://www.phoenixcontact.com/gb/products/2702523 ## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523 ## Drawings **==> picture [58 x 10] intentionally omitted <==** **----- Start of picture text -----**<br> Block diagram<br>**----- End of picture text -----**<br> ## Classifications ## eCl@ss |eCl@ss 5.1|eCl@ss 5.1|27371901| |---|---|---| |eCl@ss 6.0|eCl@ss 6.0|27371800| |eCl@ss 7.0|eCl@ss 7.0|27371819| |eCl@ss 8.0|eCl@ss 8.0|27371819| |eCl@ss 9.0|eCl@ss 9.0|27371819| ## ETIM |ETIM 5.0|ETIM 5.0|EC001449| |---|---|---| |ETIM 6.0|ETIM 6.0|EC001449| |ETIM 7.0|ETIM 7.0|EC001449| ## Approvals ## Approvals ## Approvals UL Listed / cUL Listed / cULus Listed Ex Approvals 12/30/2019 Page 5 / 6 https://www.phoenixcontact.com/gb/products/2702523 ## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523 ## Approvals Approval details **==> picture [525 x 149] intentionally omitted <==** **----- Start of picture text -----**<br> UL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324<br><br>oe<br>cUL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324<br><br>cULus Listed<br><br>**----- End of picture text -----**<br> Phoenix Contact 2019 © - all rights reserved http://www.phoenixcontact.com 12/30/2019 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.
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