159CMQ135

Overview

The SMC Diode Solutions 159CMQ135 is a Schottky rectifier in the 159CMQ series, housed in a TO-249(9 pin) package. It features a peak repetitive reverse voltage of 135 V and an average rectified forward current of 75 A per leg (150 A per device). The device supports junction temperatures from -55 °C to +175 °C with a typical thermal resistance of 0.50 °C/W per package. Key electrical characteristics include a maximum forward voltage drop of 1.05 V at 80 A and 25 °C, and a peak one-cycle non-repetitive surge current of 864 A.

Feature Summary

• Center tap module design with isolated heatsink for high frequency and high current PC board mounting
• Low forward voltage drop and high purity, high temperature epoxy encapsulation for enhanced mechanical strength
• Guard ring structure providing enhanced ruggedness and long term reliability
• Nickel plated base plate and terminals with Pb-Free construction

Applications

• Switching power supply
• Converters
• Free-Wheeling diodes
• Reverse battery protection

Procurement Notes

Verify the specific part number suffix against the manufacturer's latest datasheet N1182 Rev. A to ensure compatibility with required voltage ratings and packaging specifications. Confirm that the TO-249(9 pin) form factor matches the target PCB layout and thermal management requirements. Ensure compliance with RoHS standards as the device is explicitly identified as Pb-Free. Cross-reference ordering information to validate shipping quantities and traceability to wafer lots if required by quality protocols.

Selection Notes

Select this component for applications requiring high current handling up to 150 A per device and operation at elevated junction temperatures up to 175 °C. The low forward voltage drop contributes to improved efficiency in switching power supplies and converters. Consider the center tap configuration and multiple leads per terminal when designing for high-frequency performance. Ensure adequate heat sinking capability given the thermal resistance specifications to maintain reliable operation under continuous load conditions.

Part Context

This device belongs to the 159CMQ series of Schottky rectifiers manufactured by SMC Diode Solutions. The series includes variants such as the 159CMQ150, which shares similar structural and thermal characteristics but differs in reverse voltage rating. These components are designed for robust industrial and commercial power electronics applications, emphasizing durability through high-temperature epoxy encapsulation and nickel-plated terminals for corrosion resistance.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs by matching key parameters such as reverse voltage, forward current, and package dimensions before considering alternative sources.

FAQ

What is the maximum operating junction temperature for the 159CMQ135?

The maximum operating junction temperature is +175 °C.

How is the thermal resistance specified for this device?

The typical thermal resistance from junction to case is 1.0 °C/W per leg and 0.50 °C/W per package under DC operation.

What is the peak one-cycle non-repetitive surge current rating?

The peak one-cycle non-repetitive surge current is 864 A for an 8.3 ms half sine pulse.