STMicroelectronics STTH2002D

Overview

STTH2002D from STMicroelectronics is an ultrafast recovery silicon rectifier diode in TO-220AC package, rated for 20 A average forward current and 200 V repetitive peak reverse voltage, with typical reverse recovery time of 16 ns and forward voltage drop of 0.86 V at 20 A and 150 °C - optimized for high-frequency switch-mode power supplies and DC-DC converters.

For engineers reviewing the STTH2002D datasheet, STTH2002D pinout, STTH2002D application, or STTH2002D equivalent, key selection criteria include ultrafast trr (16 ns typ.), low thermal resistance (2.4 °C/W junction-to-case), insulated mounting capability, and ECOPACK®2 compliance for industrial power conversion designs.

Technical Context

This single-anode, single-cathode ultrafast diode uses planar passivated silicon technology to achieve low conduction losses (VF ≤ 1.10 V at 20 A, 25 °C) and minimal switching losses via controlled minority-carrier lifetime. Its 175 °C maximum junction temperature supports high-power density layouts without derating in constrained thermal environments.

The device operates with low reverse leakage (<10 µA at 25 °C, <100 µA at 125 °C) and exhibits stable dynamic performance across temperature: trr increases only modestly from 16 ns (25 °C) to ~33 ns (125 °C) under identical test conditions (IF = 1 A, dIF/dt = −200 A/µs, VR = 30 V).

Key Specifications

Pinout & Package

STTH2002D is housed in a TO-220AC package with isolated tab (non-insulated variant), featuring three terminals: Anode (pin 1), Cathode (pin 2), and electrically isolated metal tab (pin 3, thermally connected to cathode but electrically floating). Mounting torque must not exceed 0.70 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2002DI, STTH2002D offers lower thermal resistance and reduced cost where isolation is unnecessary; versus MUR2020CT, it delivers superior high-frequency efficiency and simpler layout due to single-diode topology and faster recovery.

Availability

STTH2002D is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, and solar microinverters requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STTH2002D 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

STTH2002D belongs to ST's high-voltage ultrafast diode product line, engineered specifically for high-efficiency, high-frequency power conversion in compact, thermally demanding applications.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STTH2002D is rated for IF(AV) = 20 A at TC = 120 °C in TO-220AC package. Exceeding this temperature requires derating per Figure 1 in the datasheet; sustained operation above 125 °C case temperature risks exceeding the 175 °C maximum junction temperature under full load.

Can STTH2002D be used in parallel configurations?

Yes, but only with matched VF characteristics and symmetrical PCB layout. The device's positive temperature coefficient of VF (decreasing VF with rising Tj) supports inherent current sharing; however, thermal coupling between paralleled units must be balanced to avoid current hogging.

Is the TO-220AC tab electrically connected to any internal terminal?

In STTH2002D (non-insulated TO-220AC), the metal tab is electrically connected to the cathode. This is confirmed in the pinout diagram (Figure 13) and package mechanical data - no internal isolation exists between tab and cathode in this variant.

Does STTH2002D require a snubber circuit in 200 kHz SMPS designs?

A snubber is typically unnecessary due to its 16 ns trr and low Qrr (≈12 nC at 125 °C, 20 A). However, layout parasitics (e.g., >50 nH stray inductance) may induce ringing; empirical validation with oscilloscope probing at the diode terminals is recommended before final design freeze.