TS120

Telecom Overview

The TS120 is a multifunction telecom switch integrating a 350V, 120mA, 35Ω single-pole single-throw normally-open (SPST-NO) relay with an optocoupler in a compact package. It operates with a control voltage range of 900 mVDC to 1.4 VDC and supports a maximum input current of 50 mA. The device provides 3750 VRMS input-to-output isolation and functions within a temperature range of -40°C to +85°C. Packaged in an 8-pin SMD DIP configuration, it delivers 800 mW power dissipation without requiring snubbing circuits or generating electromagnetic interference.

Telecom Feature Summary

• Integrates a solid-state relay and optocoupler for high-reliability switching
• Provides 3750 VRMS electrical isolation between input and output
• Compatible with TTL and CMOS logic levels for low drive power requirements
• Eliminates moving parts to ensure arc-free operation without external snubbing

Telecom Applications

• Telecommunications switching and tip/ring circuit management
• Modem switching for portable devices such as laptops and notebooks
• Medical equipment patient-to-equipment isolation systems

Telecom Procurement Notes

Verify the specific suffix designation when ordering, as packaging formats vary. The standard TS120 typically utilizes tube packaging, while variants like TS120STR utilize cut tape or reels. Confirm the manufacturer source, as Clare Inc. designs are now produced under IXYS Integrated Circuits Division. Ensure the selected variant matches the required surface mount or through-hole assembly process for the target PCB design.

Telecom Selection Notes

Select this component for applications requiring robust isolation in space-constrained environments. The integrated optocoupler simplifies circuit design by combining control and switching functions. Verify that the load voltage does not exceed 350VDC and the current remains within the 120mA limit. Consider thermal management for the 800mW dissipation rating if operating at elevated ambient temperatures near the upper limit.

Telecom Part Context

This component belongs to the TS120 series of multifunction telecom switches manufactured by IXYS Integrated Circuits Division. The series includes variations such as TS120S and TS120STR, which share identical electrical characteristics but differ in packaging configurations. These devices are engineered specifically for telecommunications infrastructure and instrumentation where reliable, maintenance-free switching is critical.

Telecom Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.