Vishay General Semiconductor - Diodes Division MUR2020CT

Overview

MUR2020CT from Vishay is a dual common-cathode ultrafast rectifier with 2 × 10 A average forward current per leg, 200 V peak repetitive reverse voltage, and 25 ns typical reverse recovery time at TJ = 25 °C; it serves as output rectifier in high-frequency SMPS and freewheeling diode in low-voltage motor drives.

For engineers reviewing the MUR2020CT datasheet, MUR2020CT pinout, MUR2020CT application, or MUR2020CT equivalent, key selection criteria include trr ≤ 35 ns at 125 °C, VF ≤ 1.05 V at 16 A/125 °C, RthJC = 1.25 °C/W (total device), and TO-220AB package thermal performance for industrial power conversion designs.

Technical Context

The MUR2020CT integrates two independent ultrafast rectifying elements in a single TO-220AB package with shared cathode terminal, enabling synchronous dual-leg rectification without cross-conduction risk. Its platinum-doped silicon die achieves controlled carrier lifetime for optimized trade-off between forward voltage drop and recovery speed.

Designed for hard-switched topologies operating up to 20 kHz, the device delivers low Qrr (25 nC typ. at 25 °C) and minimal IRRM (1.9 A typ. at 25 °C), reducing snubber losses and EMI generation in DC–DC converters and UPS systems.

Key Specifications

Pinout & Package

Package: TO-220AB, 3-terminal, insulated tab, center-cathode configuration with anode terminals on pins 1 and 2, common cathode on pin 3 (base tab electrically connected to cathode).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast rectifier applications.

Compared with STTH20L06TV1 and IXYS MURB2020CT, the MUR2020CT offers lowest VF in its 200 V class and optimal trr/VF balance for 100–300 kHz SMPS, while maintaining compatibility with standard TO-220AB mounting hardware and thermal interface practices.

Availability

MUR2020CT is available at Aetrix Electronics and suitable for industrial power supplies, uninterruptible power systems, and motor drive inverters requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for MUR2020CT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with leadership in power rectifiers, MOSFETs, and precision resistors.

The MUR series was developed by Vishay High Power Products to address demand for ultrafast, low-loss rectification in high-frequency industrial and telecom power conversion, emphasizing ruggedness, thermal stability, and manufacturability.

FAQ

What is the maximum junction temperature rating for the MUR2020CT?

The MUR2020CT has a maximum operating junction temperature of 175 °C, verified per Vishay Document Number 94079. This rating enables reliable operation in sealed industrial enclosures or high-ambient environments when mounted on a heatsink with RthJC = 1.25 °C/W. Derating curves in Figure 5 confirm usable current capacity up to 15 A average per leg at TC = 145 °C. The MUR2020CT maintains specified electrical parameters within this range.

Does the MUR2020CT have a center-tapped cathode configuration?

Yes, the MUR2020CT uses a center-tapped cathode configuration: pins 1 and 2 are independent anodes, and pin 3 (the metal tab) is the common cathode. This layout is explicitly defined in the "PRODUCT SUMMARY" section and confirmed in the pin diagram on page 1 of the Vishay datasheet (Document Number 94079). The MUR2020CT is not a dual-diode-isolated package - the cathodes are internally bonded and electrically common.

What is the typical reverse recovery charge (Qrr) of the MUR2020CT at 125 °C?

The typical reverse recovery charge (Qrr) of the MUR2020CT is 78 nC at TJ = 125 °C, as specified in the "DYNAMIC RECOVERY CHARACTERISTICS" table on page 2 of the Vishay datasheet (Document Number 94079). This value is measured under IF = 10 A, dIF/dt = 200 A/µs, and VR = 160 V conditions. The MUR2020CT's Qrr increases predictably with temperature, supporting accurate loss modeling across its full operating range.

Is the MUR2020CT RoHS compliant?

Yes, the MUR2020CTPbF variant is RoHS compliant per EU Directive 2002/95/EC, with applicable exemptions for lead in high-melting-temperature solder alloys. This compliance is stated in the "FEATURES" section and confirmed in the "ORDERING INFORMATION TABLE" where "PbF" denotes lead-free terminations. The MUR2020CTPbF marking appears on the device body per Vishay document 95225, and the MUR2020CT is supplied exclusively in PbF form.

What thermal resistance does the MUR2020CT exhibit from junction to case?

The MUR2020CT exhibits a total device thermal resistance of RthJC = 1.25 °C/W from junction to case, as published in the "THERMAL – MECHANICAL SPECIFICATIONS" table on page 2 of the Vishay datasheet (Document Number 94079). This value applies to the entire dual-diode structure and assumes proper mounting torque (6–12 kgf·cm) and greased interface. Per-leg RthJC is 2.5 °C/W, confirming symmetrical thermal distribution across both legs of the MUR2020CT.