Basler Electric 9148100106 MOC3502 Solid State Relay

The Basler Electric 9148100106 is a solid‑state relay (SSR) based on the MOC3502 optocoupler design, providing DC switching capability for low‑power control circuits. It is rated for 250 VDC and 0.25 A continuous current, making it suitable for applications such as motor operator controls, solenoid drivers, and auxiliary contact interfaces. The SSR offers fast switching, high isolation, and long operational life compared to electromechanical relays.

Design and Construction

This relay is housed in a compact, industry‑standard package with screw‑terminal connections for easy wiring. It uses a photovoltaic or MOSFET output stage, providing silent, bounce‑free switching. The input side is optically isolated from the output, with a typical isolation voltage of 2500 V RMS, ensuring safety and noise immunity. The relay is designed for panel or DIN‑rail mounting and operates over a wide temperature range.

Performance Characteristics

Switching speed: turn‑on time < 100 µs, turn‑off time < 200 µs. Zero‑crossing or random‑turn‑on options are available depending on configuration. The relay has a low on‑resistance (typically < 10 ohms) to minimize power loss. It is immune to contact wear, arcing, and shock/vibration, providing high reliability in harsh industrial environments.

Technical Specifications

Input control voltage: 5‑24 VDC (or 120 VAC with rectifier). Output voltage: up to 250 VDC. Output current: 0.25 A continuous, 0.5 A peak. Load power: 62.5 W max. Isolation: 2500 V RMS. Operating temperature: –25°C to +70°C. Approvals: CE, UL recognized. Dimensions: 45 mm x 15 mm x 30 mm (typical).

Applications

This solid‑state relay is commonly used in Basler Electric motor operator controls for circuit breakers and tap changers, as well as in PLC output modules, alarm annunciators, and low‑power DC loads. It is also used in battery charging systems and solar panel switching where fast, reliable DC switching is required.

Installation and Usage

Connect the input control signal to the appropriate terminals, observing polarity for DC inputs. Connect the load to the output terminals. Ensure that the load current does not exceed the rated value and that adequate heat sinking is provided if operating near maximum ratings. The relay requires no maintenance and has a virtually unlimited switching life under rated conditions.

Reliability and Quality

Basler Electric ensures that each 9148100106 relay undergoes rigorous testing for electrical parameters, isolation, and thermal performance. The use of optical isolation and solid‑state technology eliminates mechanical failure modes, offering a long service life and consistent performance.

Conclusion

The Basler Electric 9148100106 MOC3502 solid‑state relay is a compact, durable, and efficient solution for DC switching in control and automation systems. Its high isolation, fast response, and maintenance‑free operation make it a superior choice for demanding applications.