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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

STMicroelectronics STTH806G-TR

Name: STTH806G-TR
Brand: STMicroelectronics
SKU: STTH806G-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH806G-TR

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: STTH806G-TR.pdf

Description:: DIODE GEN PURP 600V 8A D2PAK

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Product details

Overview

STTH806G-TR from STMicroelectronics is an ultrafast 600 V, 8 A high-voltage rectifier diode in D2PAK (TO-263) package with insulated case, optimized for switching power supplies and industrial AC/DC converters. It delivers 35 ns reverse recovery time, 1.1 V typical forward voltage at 150 °C, and 4.5–6.5 A peak reverse recovery current under 100 A/µs dI/dt.

For engineers reviewing the STTH806G-TR datasheet, STTH806G-TR pinout, STTH806G-TR application, or STTH806G-TR equivalent, this device is selected for high-efficiency flyback and PFC stages where low conduction loss, fast soft recovery, and thermal robustness up to 175 °C junction temperature are critical.

Technical Context

The STTH806G-TR employs ST's Turbo 2 silicon technology to achieve ultrafast soft recovery with controlled reverse recovery charge (Q_rr) and low IRM, minimizing EMI and voltage overshoot in hard-switched topologies. Its insulated D2PAK package provides 2500 V_RMS isolation between tab and die, enabling direct heatsink mounting without insulating washers.

Thermal performance is defined by R_th(j-c) = 2.5 °C/W (junction-to-case), supporting 8 A average forward current at T_c = 140 °C. Dynamic parameters-including t_rr, I_RM, and softness factor-are characterized across dI/dt (50–500 A/µs) and junction temperature (25–125 °C), ensuring predictable behavior in variable-load industrial systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - Withstands repetitive reverse voltage up to 600 V, suitable for 400 V DC bus applications with safety margin.
I_F(AV)	8 A at T_c = 140 °C - Sustains continuous forward current in thermally constrained PCB-mounted designs.
t_rr (max)	35 ns at T_j = 25 °C - Enables high-frequency operation (>100 kHz) with minimal switching loss and reduced snubber requirements.
V_F (typ)	1.1 V at I_F = 8 A, T_j = 150 °C - Low conduction loss improves efficiency in high-temperature PFC and output rectification stages.
R_th(j-c)	2.5 °C/W - Allows direct thermal coupling to heatsink; enables compact thermal design with ≤20 W dissipation at ΔT = 50 °C.
C_iss	7 pF typical - Low package capacitance minimizes capacitive coupling noise and improves EMI performance in high-dV/dt environments.
T_j(max)	175 °C - Supports operation in harsh industrial ambient conditions without derating below full current rating.

Pinout & Package

D2PAK (TO-263) surface-mount package with isolated metal tab (2500 V_RMS insulation), epoxy body compliant with UL94 V0, and recommended torque of 0.80 Nm for mounting screw.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 2)	Forward current entry point	Connected to input AC or switching node; carries full load current during conduction phase.
Cathode (Lead 3)	Forward current exit point	Connected to output rail or ground return; must handle high dI/dt transients without ringing.
Isolated Tab (Case)	Thermal path / electrical isolation barrier	Electrically isolated from die; serves as primary heatsink interface without requiring mica washer or silicone pad.

Key Features

Feature	Design Value
Ultrafast soft recovery	t_rr = 35 ns with softness factor >1.0 at 125 °C ensures low EMI and reduced voltage overshoot in flyback snubbers.
Low thermal resistance	R_th(j-c) = 2.5 °C/W enables 8 A operation with <50 °C rise above heatsink, reducing need for oversized thermal pads.
High-voltage isolation	2500 V_RMS insulation between tab and die eliminates external isolation hardware in DIN-rail mounted PSUs.
Robust surge capability	I_FSM = 90 A (10 ms sine) supports inrush current handling in industrial motor drives and UPS systems.
ECOPACK® compliance	Lead-free second-level interconnect meets JEDEC JESD97; compatible with standard Pb-free reflow profiles (peak 260 °C).

Applications

AC/DC Front-End Rectification

Active PFC Output Diode

Use Scenario: Single-phase 400 V AC input rectification feeding boost PFC stage in industrial SMPS.

IC Role / Device Role / Timing Role: High-voltage output rectifier conducting during PFC switch-off intervals; handles 100 kHz switching transitions.

Use Value: 35 ns t_rr and soft recovery minimize reverse recovery losses and reduce MOSFET voltage stress during turn-on.

Use Scenario: Output diode in continuous-conduction-mode (CCM) boost PFC converter operating at 65–100 kHz.

IC Role / Device Role / Timing Role: Unidirectional current path delivering boosted DC to bulk capacitor; subjected to high dI/dt (>100 A/µs).

Use Value: 6.5 A I_RM and low Q_rr prevent excessive voltage spikes across boost switch, improving reliability.

Switch-Mode Power Supply Flyback Diode

Industrial Motor Drive Snubber Diode

Use Scenario: Secondary-side rectifier in 20–60 W offline flyback adapter for PLC I/O modules.

IC Role / Device Role / Timing Role: Fast-recovery diode clamping transformer leakage energy and conducting output current.

Use Value: 1.1 V V_F at 150 °C reduces conduction loss by ~15% vs. standard FRD, improving light-load efficiency.

Use Scenario: Clamp diode in IGBT-based 3-phase inverter brake circuit for HVAC compressors.

IC Role / Device Role / Timing Role: Absorbs regenerative energy during rapid deceleration; exposed to repeated 400 V reverse transients.

Use Value: 600 V V_RRM with 175 °C T_j(max) ensures stable operation under sustained overload and ambient >85 °C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH8R06DJ-TR	D2PAK package, same 600 V/8 A rating, but non-insulated tab (R_th(j-c) = 2.5 °C/W, no isolation)	Requires insulating pad for heatsink mounting; unsuitable where creepage/clearance mandates isolation.	Select when board layout allows direct tab grounding and thermal performance is prioritized over isolation.
IXYS MUR860E-E3/45	600 V/8 A, TO-220AC package, t_rr = 50 ns (max), V_F = 1.75 V (typ) at 25 °C	Higher forward drop and slower recovery increase conduction + switching losses in high-frequency PFC.	Use only in lower-frequency (<50 kHz), cost-sensitive designs where thermal margin exceeds 30 °C.

Compared with STTH806G-TR, STTH8R06DJ-TR trades isolation for identical thermal performance in grounded-tab layouts, while IXYS MUR860E-E3/45 offers legacy compatibility but sacrifices 15 ns recovery speed and 0.65 V forward drop margin at elevated temperature.

Availability

STTH806G-TR is available at Aetrix Electronics and suitable for switching power supplies, industrial AC/DC converters, and motor drive snubber circuits requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for STTH806G-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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The STTH series belongs to ST's Turbo 2 ultrafast rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in industrial and telecom infrastructure where thermal resilience and EMI control are critical.

FAQ

What is the maximum allowable case temperature for continuous 8 A operation?

The STTH806G-TR supports I_F(AV) = 8 A at T_c = 140 °C per datasheet Table 1. Exceeding this requires linear derating: at T_c = 150 °C, max I_F(AV) drops to ~7.2 A. Thermal design must ensure case temperature remains ≤140 °C under worst-case airflow and ambient conditions.

Does the insulated tab require thermal compound when mounted to a heatsink?

Yes - although electrically isolated, the tab is the primary thermal path. ST recommends thermally conductive, electrically insulating compound (e.g., ceramic-filled grease or phase-change pad) to minimize R_th(c-hs). Mechanical mounting torque must be maintained at 0.80 Nm to ensure uniform contact pressure.

How does soft recovery behavior affect EMI in high-density power layouts?

With softness factor >1.0 across 25–125 °C, the STTH806G-TR limits di/dt during reverse recovery, reducing high-frequency current spikes that couple into adjacent traces. This lowers common-mode noise on input filters and eases EN55032 Class B compliance without additional ferrite beads or shielding.

Can STTH806G-TR replace STTH806D in existing TO-220AC designs?

No - STTH806G-TR uses D2PAK (TO-263) footprint and solder-reflow assembly, while STTH806D is through-hole TO-220AC. Pad layout, thermal vias, and mechanical mounting differ fundamentally. A redesign is required to migrate; thermal performance improves (R_th(j-c) 2.5 vs. 2.5 °C/W), but isolation rating remains identical.

STTH806G-TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 600 V

Current - Average Rectified (Io):: 8A

Voltage - Forward (Vf) (Max) @ If:: 1.85 V @ 8 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 55 ns

Current - Reverse Leakage @ Vr:: 8 µA @ 600 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

Operating Temperature - Junction:: 175°C (Max)

STTH806G-TR FAQ

1.How can I place an order for STTH806G-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH806G-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STTH806G-TR reliable?

The price and inventory of STTH806G-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH806G-TR is usually 5 days.

3.What payment methods are accepted for STTH806G-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH806G-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH806G-TR?

STTH806G-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH806G-TR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STTH806G-TR?

For technical support, including STTH806G-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH806G-TR requirements.

6.How does Aetrix verify that STTH806G-TR is sourced from the original manufacturer or authorized distributors?

All STTH806G-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STTH806G-TR meets industry standards.

7.What is the process for return or replacement of STTH806G-TR?

All STTH806G-TR units undergo pre-shipment inspection (PSI). If there is an issue with STTH806G-TR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STTH806G-TR part is unused and in its original packaging.

Return procedure for STTH806G-TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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