STMicroelectronics STTH1506DPI

Overview

STTH1506DPI from STMicroelectronics is a 600 V, 15 A hyperfast tandem boost diode composed of two series-connected 300 V dice in an insulated DOP3I package, optimized for continuous-conduction-mode (CCM) PFC stages and hard-switching converters where high dIF/dt (>200 A/µs) and low Qrr (80 nC) are critical. It delivers 16 ns typical reverse recovery time at 25°C and 4.8 A peak reverse recovery current at 125°C under 400 V VR.

For engineers reviewing the STTH1506DPI datasheet, STTH1506DPI pinout, STTH1506DPI application, or STTH1506DPI equivalent, key selection criteria include its dual-die thermal symmetry, 2500 VRMS insulation enabling shared heatsinking with MOSFETs, softness factor (S = 0.4), and conduction loss equation (P = 1.7 × IF(AV) + 0.047 × IF²(RMS)).

Technical Context

The STTH1506DPI implements a tandem architecture with two matched 300 V silicon diode dice in series to achieve 600 V VRRM while maintaining ultrafast recovery (trr = 16 ns typ.) and low Qrr (80 nC). Its internal ceramic insulation ensures equal thermal conditions across both dice and enables 2500 VRMS isolation between anode/cathode and case.

Designed explicitly for high-dIF/dt operation (up to −200 A/µs), it suppresses MOSFET switching losses in boost PFC and LLC resonant converters by minimizing reverse recovery charge injection and peak IRM (4.8–6.0 A at 125°C), with soft recovery (S = 0.4) reducing EMI generation during turn-off.

Key Specifications

Pinout & Package

The STTH1506DPI is housed in the insulated DOP3I package (20.4–21.1 mm × 15.1–15.5 mm × 14.35–15.60 mm), featuring electrically isolated anode and cathode terminals bonded to a common metal baseplate rated for 2500 VRMS isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hyperfast boost diode applications.

Compared with STTH1606DI, the STTH1506DPI trades 1 A IF(AV) for lower Qrr and tighter thermal matching; versus MUR1560CT, it delivers superior dIF/dt immunity and integrated isolation-critical for compact, high-efficiency PFC designs.

Availability

STTH1506DPI is available at Aetrix Electronics and suitable for industrial CCM PFC boost converters, server PSU front-end rectification, motor drive DC bus clamping, and EV onboard charger boost stages requiring stable component supply and long-term lifecycle support.

Supply support for STTH1506DPI 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 STTH series targets high-efficiency AC/DC conversion, specifically engineered for ultrafast recovery, low Qrr, and thermal robustness in continuous-conduction-mode PFC and high-frequency switching power supplies.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The STTH1506DPI has a maximum operating junction temperature (Tj) of +150°C, validated across all electrical parameters including VF, trr, and Qrr. Operation above this limit risks irreversible degradation of the tandem die structure and increased leakage current, per absolute ratings table on page 2 of the official datasheet.

Can STTH1506DPI be mounted directly on the same heatsink as a high-side MOSFET?

Yes-the DOP3I package provides 2500 VRMS isolation between anode/cathode terminals and the metal baseplate, allowing direct mechanical mounting on the same heatsink as a 600 V MOSFET without additional insulating hardware or creepage concerns, as confirmed in the "Insulation" section of the product description.

How does the tandem die architecture improve reliability versus single-die 600 V diodes?

The tandem architecture uses two matched 300 V dice in series, ensuring inherent voltage sharing without external resistors. This eliminates single-point failure modes and prevents thermal runaway under uneven stress, as verified by static/dynamic equilibrium design and thermal symmetry data in the "Major Products Characteristics" section.

Is the 16 ns reverse recovery time measured under standard JEDEC conditions?

No-the 16 ns trr is specified at IF = 0.5 A, Irr = 0.25 A, IR = 1 A, and Tj = 25°C (page 2), not JEDEC's standard IF = 1 A, VR = 30 V, dIF/dt = −100 A/µs. For design-critical evaluation, use the dIF/dt-dependent curves in Figures 4–6, where trr rises to ~25 ns at −200 A/µs and 125°C.