STMicroelectronics STTH1506TPI

Overview

STTH1506TPI from STMicroelectronics is a 600 V tandem hyperfast rectifier composed of two matched 300 V silicon diode dice in series, rated for 15 A average forward current and 26 A RMS, with 16 ns reverse recovery time at 25°C and 35 ns at 125°C under hard-switching conditions. It serves as a boost diode in continuous-conduction-mode (CCM) power factor correction circuits, enabling MOSFET downsizing and reduced heatsink requirements.

For engineers reviewing the STTH1506TPI datasheet, STTH1506TPI pinout, STTH1506TPI application, or STTH1506TPI equivalent, key selection criteria include its 600 V V_RRM, ultra-low trr (≤35 ns), softness factor (S = 0.4), 2.6 V max VF at 125°C, and ceramic-insulated TOP3I package enabling shared heatsink mounting with MOSFETs.

Technical Context

This tandem diode integrates two thermally balanced 300 V dice in series within a single insulated package, eliminating need for external voltage-balancing networks in PFC applications. Its hyperfast recovery (trr ≤35 ns at Tj = 125°C, dIF/dt = −200 A/µs) and low stored charge (Qrr typ. <100 nC) minimize switching losses and ringing in high-dIF/dt boost stages.

The device features 2500 V_RMS isolation between case and terminals, allowing direct mounting on the same heatsink as high-side MOSFETs without insulation pads. Junction-to-case thermal resistance is 1.6 °C/W total (2.9 °C/W per die + 0.3 °C/W coupling), supporting 50 W conduction loss dissipation at Tc = 70°C.

Key Specifications

Pinout & Package

STTH1506TPI uses the TOP3I package: insulated TO-220 variant with three leads, ceramic isolation layer, and metal tab electrically isolated from all terminals. Dimensions: 20.4–21.1 mm (L) × 15.1–15.5 mm (H) × 4.4–4.6 mm (A), weight 4.46 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1506TPI, STTH1606DIP trades integrated insulation for slightly higher thermal resistance, while MUR1560CT lacks tandem architecture-requiring external balancing and exhibiting slower recovery-making STTH1506TPI uniquely suited for compact, high-reliability CCM PFC designs.

Availability

STTH1506TPI is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, server & telecom rectification, and EV onboard charger PFC stages requiring stable component supply and long-term lifecycle support.

Supply support for STTH1506TPI 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The TURBOSWITCH "H" family-including STTH1506TPI-is engineered specifically for high-dIF/dt PFC and SMPS boost stages where ultrafast, soft recovery and thermal integration with MOSFETs are critical.

FAQ

Is STTH1506TPI pin-compatible with standard TO-220 diodes?

No. STTH1506TPI uses the insulated TOP3I package with three leads (Anode 1, Cathode, Common), differing from standard TO-220AC/AB pinouts. The Common terminal is internally connected and not externally accessible; external wiring must follow the tandem anode–cathode topology shown in the datasheet Figure 1.

What is the maximum allowable dIF/dt for reliable operation?

The device is characterized up to −200 A/µs at Tj = 125°C (IRM = 4.8–6.0 A). Operation beyond this requires validation per application; exceeding −250 A/µs risks increased EMI and potential IRM-induced MOSFET stress due to limited softness margin above S = 0.4.

Can STTH1506TPI be used in discontinuous conduction mode (DCM) PFC?

Yes, but not optimized for it. Its low Qrr and soft recovery provide benefit in DCM, yet its 15 A I_F(AV) rating and thermal design target CCM operation. For DCM, smaller diodes like STTH8R06D may offer better cost/performance trade-offs.

Does the 2500 V_RMS insulation rating apply to DC voltage?

No. The 2500 V_RMS rating is for AC hipot testing per IEC 60747-5-1. For DC isolation, STMicroelectronics specifies creepage/clearance per package drawing TOP3I (≥4.0 mm), supporting safe operation at ≤1000 V DC with appropriate PCB layout per IPC-2221.