Procurement managers rarely finalize OPT-5DC-24DC-2 without reviewing SMPS Phoenix, Phoenix 2982100 and Phoenixcontact Phoenix Contact Industrial Ethernet Switches, ensuring that the chosen component meets budget, compliance, and delivery conditions.
Phoenix OPT- 5DC/ 24DC/ 2 Solid State Relay
The Phoenix OPT- 5DC/ 24DC/ 2 Solid State Relay (Part No: 2967989 ) offers a 4 V DC ... 6 V DC input voltage range, 3 V DC ... 33 V DC output voltage range, 3 A (see derating curve) limiting continuous current, RT III Degree of protection. Manufactured by Phoenix under the Phoenix Solid State Relay category, this model belongs to the Phoenix OPT Series.

| Brand | Phoenix Contact |
| Product Type | Single Solid State Relay |
| Model Number | OPT- 5DC/ 24DC/ 2 |
Phoenix OPT- 5DC/ 24DC/ 2 Solid State Relay – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Solid State Relay |
| Insulation | Basic insulation |
| Overvoltage category | III |
| Maximum power dissipation for nominal condition | 0.05 W |
| Test voltage (Input/output) | 2.5 kV (50 Hz, 1 min., input/output) |
| Nominal input voltage UN | 5 V DC |
| Input voltage range in reference to UN | 0.8 ... 1.2 |
| Input voltage range | 4 V DC ... 6 V DC |
| Typical input current at UN | 9 mA |
| Typical response time | 20 µs (at UN) |
| Typical turn-off time | 300 µs (at UN) |
| Transmission frequency | 300 Hz |
| Contact switching type | 1 N/O contact |
| Design of digital output | electronic |
| Output voltage range | 3 V DC ... 33 V DC |
| Limiting continuous current | 3 A (see derating curve) |
| Maximum inrush current | 15 A (10 ms) |
| Voltage drop at max. limiting continuous current | ≤ 150 mV |
| Output circuit | 2-conductor, floating |
| Protective circuit | Reverse polarity protection |
| Width | 5 mm |
| Height | 28 mm |
| Depth | 15 mm |
| Color | black (RAL 9005) |
| Degree of protection | RT III |
| Ambient temperature (operation) | -25 °C ... 60 °C |
| Ambient temperature (storage/transport) | -25 °C ... 70 °C |
| Identification | ISA-S71.04. G3 Harsh Group |
| Standards/regulations | IEC 60664 |
| Mounting position | any |
The Phoenix OPT-5DC/24DC/2 (Part No. 2967989) is a Single Solid-state Relay built for reliable DC load switching in space-constrained automation panels. It operates with a 5 V DC input (range: 4–6 V DC), consumes only 9 mA of current, and supports an output voltage range of 3–33 V DC. With a limiting continuous current of 3 A and a 15 A inrush current capability, it ensures stable switching for pulse-based and resistive circuits. Its 300 Hz switching frequency and compact 5 mm-wide housing make it a practical choice for modern, high-density installations.
This relay includes reverse polarity protection, floating 2-conductor output, and meets IEC 60664 and ISA-S71.04 G3 Harsh Group standards. The housing is rated RT III, offering protection in humid, chemically exposed, or vibration-prone environments. With a 20 µs response time and 300 µs turn-off delay, the relay is suited for PLC control signals, test systems, and signal conditioning circuits in OEM automation. Its compact size, high-speed switching, and long service life make it a preferred relay for engineers working on modern control systems. This performance and reliability are why many industrial buyers continue to select the Phoenix OPT-5DC/24DC/2.
To view more advanced solid-state relay solutions, visit our Phoenix Relay category. For a complete range of automation components from the brand, check the Phoenix Contact section on IndMALL.







