TCMT1116

Overview

The TCMT1116 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It integrates a gallium arsenide infrared-emitting diode with a phototransistor in a half-pitch Mini-Flat 4-SOP package. Key electrical parameters include a collector-emitter breakdown voltage of 70 V, a maximum forward current of 50 mA, and an isolation voltage of 3750 Vrms. The device features a typical coupling capacitance of 0.3 pF and operates within an ambient temperature range of -40°C to +110°C.

Feature Summary

• Half-pitch Mini-Flat package design for low profile applications
• High AC isolation test voltage of 3750 Vrms
• Low coupling capacitance for high-speed signal integrity
• VDE approved and UL recognized for safety compliance

Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback circuits
• Signal isolation between microcontrollers and high-voltage interfaces
• Safety-critical communication channels

Procurement Notes

Verify the specific Current Transfer Ratio (CTR) group required for the application, as the series offers selected CTR bins. Confirm that the 4-SOP surface mount package aligns with PCB layout constraints. Ensure thermal management supports the specified operating temperature range during integration. Cross-reference agency approvals such as UL and VDE against local regulatory requirements before finalizing procurement.

Selection Notes

Select this component when a compact footprint and high isolation voltage are prioritized over through-hole alternatives. The low coupling capacitance makes it suitable for applications sensitive to capacitive coupling noise. Consider the CTR selection groups if precise gain control is necessary. Verify that the 50 mA maximum forward current meets the drive requirements of the input circuitry without exceeding limits.

Part Context

The TCMT1116 belongs to the TCMT111X series, which includes variants like the TCMT1118. These components share the same physical package and basic structural design but differ in their Current Transfer Ratio (CTR) specifications. The series is designed for general-purpose isolation tasks where space efficiency and safety certifications are critical factors in the design process.

Replacement Considerations

Direct substitutes within the same series may include the TCMT1118, provided the CTR specifications match the circuit requirements. Verify pinout compatibility and package dimensions when swapping between variants. Ensure that any replacement maintains the required isolation voltage and operating temperature range.