STMicroelectronics STTH1L06A

Overview

STTH1L06A from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in SMA package, rated for 600 V repetitive peak reverse voltage, 1 A average forward current, and 80 ns maximum reverse recovery time. It serves as a boost diode in discontinuous/critical-mode PFC circuits and as a freewheeling diode in switch-mode power supplies.

For engineers reviewing the STTH1L06A datasheet, STTH1L06A pinout, STTH1L06A application, or STTH1L06A equivalent, key selection criteria include reverse recovery time (trr ≤ 80 ns), low thermal resistance (Rth(j-l) = 30 °C/W), soft recovery behavior, and suitability for high-frequency (>100 kHz) PFC stages requiring low conduction and switching losses.

Technical Context

This diode employs ST's Turbo 2 600 V technology to achieve ultrafast switching with low reverse recovery current and soft recovery characteristics-critical for minimizing EMI and voltage overshoot in high-dV/dt PFC and SMPS applications. Its junction-to-lead thermal resistance of 30 °C/W enables efficient heat dissipation in compact SMA layouts.

The device operates up to 175 °C junction temperature and exhibits a typical forward voltage drop of 0.85 V at 1 A and 150 °C, supporting stable performance in thermally constrained industrial power designs. Reverse leakage remains ≤75 µA at 600 V and 150 °C, ensuring reliability under high-voltage stress.

Key Specifications

Pinout & Package

The STTH1L06A is housed in an SMA (DO-214AC) surface-mount plastic package with cathode band marking on the body. Lead finish is matte tin, RoHS-compliant, and ECOPACK® certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06 and MBR160, the STTH1L06A uniquely balances 600 V capability, 80 ns speed, and SMA thermal performance-making it the only option among the three qualified for CrCM PFC in compact, high-efficiency 100–250 W industrial power supplies.

Availability

STTH1L06A is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, active PFC boost stages, LED driver power stages, and DC-DC converter output rectification requiring stable component supply and long-term lifecycle support.

Supply support for STTH1L06A 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STTH1L06A belongs to ST's Turbo 2 ultrafast rectifier product line-engineered specifically for high-frequency, high-efficiency power conversion in PFC and SMPS topologies where low trr, soft recovery, and thermal robustness are mandatory.

FAQ

What is the maximum junction temperature and how does it affect layout?

The STTH1L06A has a maximum junction temperature of 175 °C. This allows operation at case temperatures up to 135 °C in SMA configuration, provided the PCB includes ≥1 cm² of 35 µm copper per lead for thermal conduction. Layout must avoid thermal isolation-copper pours under both leads are essential to maintain R_th(j-a) ≤ 80 °C/W.

Is the STTH1L06A suitable for synchronous rectification replacement?

No-it is a unidirectional silicon PN junction rectifier, not a MOSFET-based synchronous device. While its 80 ns t_rr and low V_F reduce losses versus standard fast diodes, it cannot be actively controlled like a synchronous rectifier. It is best applied where simplicity, cost, and reliability outweigh marginal efficiency gains from synchronous schemes.

How does soft recovery benefit EMI performance?

Soft recovery (S-factor >1.0) limits the rate of current decay (di/dt) during turn-off, suppressing high-frequency current spikes that excite parasitic LC resonances. This directly reduces broadband conducted EMI-especially in the 30–100 MHz range-lowering filter component count and easing CISPR-22/EN55032 compliance in Class B power supplies.

Can STTH1L06A be used in place of STTH1L06U?

Yes-both share identical die and electrical specs, differing only in package: STTH1L06U uses SMB (DO-214AA), while STTH1L06A uses SMA (DO-214AC). The SMA offers lower R_th(j-l) (30 vs. 25 °C/W) and smaller footprint. Mechanical compatibility depends on PCB land pattern; thermal and electrical performance is equivalent when layout accounts for package-specific thermal paths.