STMicroelectronics STTH20LCD06CG-TR

Overview

STTH20LCD06CG-TR from STMicroelectronics is a dual common-cathode ultrafast high-voltage rectifier diode in D2PAK surface-mount package, rated for 600 V repetitive peak reverse voltage, 20 A total average forward current (10 A per diode), and 50 ns maximum reverse recovery time at 25 °C. It employs Turbo2 technology to minimize conduction and switching losses in interleaved PFC stages of high-efficiency SMPS.

For engineers reviewing the STTH20LCD06CG-TR datasheet, STTH20LCD06CG-TR pinout, STTH20LCD06CG-TR application, or STTH20LCD06CG-TR equivalent, key selection criteria include reverse recovery softness (SFACTOR > 2.5 at 125 °C), low thermal resistance (Rth(j-c) = 3.5 °C/W), and validated performance under high dIF/dt (up to 500 A/µs) in continuous conduction mode PFC designs.

Technical Context

This dual-diode rectifier integrates two independent ultrafast junctions sharing a common cathode terminal, enabling synchronous operation in bridge or center-tap configurations. Its Turbo2 process delivers low QRR (typ. 180 nC at 125 °C) and controlled IRM (2.8 A max at 125 °C), critical for reducing EMI and snubber stress in 65–300 kHz PFC converters.

The device operates up to 175 °C junction temperature with guaranteed trr ≤ 50 ns across full temperature range, and exhibits soft reverse recovery (SFACTOR ≥ 2.5) to suppress voltage overshoot during turn-off-essential for reliability in high-dV/dt environments like server PSU front-ends.

Key Specifications

Pinout & Package

D2PAK (TO-263AB) surface-mount package with isolated tab (electrically connected to cathode), optimized for high-current PCB thermal conduction. Dimensions: 9.15 mm × 10.2 mm × 4.5 mm (L × W × H); weight: 1.48 g; ECOPACK® compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH20LCD06CT and MUR2060CT, STTH20LCD06CG-TR offers superior thermal performance (3.5 °C/W vs. 4.0 °C/W), tighter trr control (50 ns vs. 60 ns), and lower VF (1.25 V vs. 1.75 V), making it optimal for high-density, high-efficiency PFC modules requiring automated SMT assembly and strict thermal budgets.

Availability

STTH20LCD06CG-TR is available at Aetrix Electronics and suitable for server power supply front-ends, industrial UPS rectifier stages, and EV onboard charger PFC modules requiring stable component supply, full traceability, and long-lifecycle support.

Supply support for STTH20LCD06CG-TR 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.

This device belongs to ST's Turbo2 ultrafast diode product line, engineered specifically for high-frequency, high-efficiency switching power supplies with interleaved PFC architectures and stringent EMI constraints.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STTH20LCD06CG-TR supports continuous operation with case temperature (Tc) up to 105 °C when mounted on ≥10 cm² of 2 oz copper with thermal vias. At this Tc, each diode delivers 10 A average forward current with junction temperature held at ≤175 °C using its 3.5 °C/W thermal resistance.

Does this part require a heatsink in typical 2 kW PFC applications?

No external heatsink is required if the D2PAK tab is soldered directly to ≥25 cm² of 2 oz copper on an FR4 PCB with ≥8 thermal vias (0.3 mm diameter). Under those conditions, thermal simulation shows junction temperature remains ≤145 °C at 20 A total IF(AV) and 50 °C ambient.

How does the soft recovery characteristic affect EMI filter design?

With SFACTOR ≥ 2.5, the diode produces minimal high-frequency ringing during turn-off, reducing peak-to-peak noise above 30 MHz by ≥15 dB compared to standard fast recovery diodes. This allows smaller Y-capacitors and fewer ferrite beads in the EMI filter, cutting BOM cost by ~$0.35 per unit in Class B designs.

Can STTH20LCD06CG-TR replace STTH12S06 in existing designs?

No-STTH12S06 is a single-diode 12 A device in TO-220 package with trr = 65 ns and VF = 1.7 V. STTH20LCD06CG-TR has double the current rating, dual-anode topology, 15 ns faster recovery, and 0.45 V lower VF, but requires PCB layout revision for D2PAK footprint and common-cathode routing.