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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

STMicroelectronics STTH806TTI

Name: STTH806TTI
Brand: STMicroelectronics
SKU: STTH806TTI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH806TTI

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-220-3

Datasheet:: STTH806TTI.pdf

Description:: DIODE ARRAY GP 600V 8A TO220AB

Quantity:: RFQ Add To RFQ list

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Inventory:136

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Product details

Overview

STTH806TTI from STMicroelectronics is an insulated ultra-fast 600 V tandem diode composed of two 300 V dice in series, designed specifically as a boost diode in continuous-conduction-mode (CCM) power factor correction (PFC) circuits operating under hard-switching conditions. It delivers 8 A average forward current, 14 A RMS forward current, and ultra-low reverse recovery time (13 ns at 25°C), enabling reduced MOSFET switching losses and smaller heatsink sizing.

For engineers reviewing the STTH806TTI datasheet, STTH806TTI pinout, STTH806TTI application, or STTH806TTI equivalent, key selection criteria include its 2.6 V max forward voltage at 125°C, 4–5.5 A peak reverse recovery current under high dIF/dt (−200 A/µs), softness factor of 0.4, 2500 V_RMS insulation rating, and TO-220AB insulated package for flexible thermal management.

Technical Context

The STTH806TTI implements a tandem die architecture-two monolithic 300 V diodes connected in series-to achieve 600 V blocking capability without external voltage-balancing networks. Its ultra-fast recovery (trr = 13 ns typ. at 25°C) and low stored charge (Qrr < 20 nC at IF = 8 A, dIF/dt = −200 A/µs) minimize turn-off losses and EMI generation in high-frequency PFC stages.

It features a soft recovery characteristic (Sfactor = 0.4) and low transient forward voltage overshoot (VFP = 7 V at dIF/dt = 100 A/µs), reducing voltage stress on associated MOSFETs. The internal ceramic insulation enables direct mounting to common or isolated heatsinks while maintaining 2500 V_RMS isolation between case and terminals.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - Enables use in universal-input (90–265 V_AC) CCM PFC front-ends with margin against line surges.
I_F(AV)	8 A - Supports continuous conduction mode operation up to ~500 W output in single-phase PFC designs.
t_rr	13 ns (typ., 25°C) - Reduces switching loss and dv/dt-induced gate ringing in fast-switching GaN/SiC-compatible topologies.
V_F (max)	2.6 V @ T_j = 125°C, I_F = 8 A - Limits conduction loss to ≤27 W total dissipation at T_c = 80°C.
R_th(j-c)	2.6 °C/W (total) - Allows thermal design with standard TO-220 heatsinks; per-diode R_th(j-c) = 5 °C/W.
Insulation	2500 V_RMS, 7 pF - Permits safe mounting on shared chassis grounds without creepage/clearance compromises.
Sfactor	0.4 - Suppresses voltage spikes during recovery, lowering snubber requirements and MOSFET V_DS stress.

Pinout & Package

STTH806TTI uses an insulated TO-220AB package with three terminals: Anode (pin 1), Cathode (pin 2), and electrically isolated metal tab (pin 3). The tab serves as a thermally conductive but electrically floating heat transfer surface, rated for 2500 V_RMS isolation from both terminals.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Input terminal for forward current flow	Connected to PFC inductor node; withstands full 600 V reverse bias during switch-off.
Cathode (Pin 2)	Output terminal for forward current flow	Connected to bulk capacitor positive rail; carries full load current with minimal VF-related loss.
Metal Tab	Electrically isolated thermal interface	Mounts directly to heatsink without insulator washer; enables compact layout and simplified thermal path.

Key Features

Feature	Design Value
Tandem die architecture	Two matched 300 V dice in series eliminate need for external voltage balancing in 600 V PFC applications.
Ultra-fast soft recovery	13 ns trr + 0.4 Sfactor reduces EMI and MOSFET voltage overshoot during hard commutation.
Insulated TO-220AB package	2500 V_RMS isolation allows direct heatsink mounting without thermal pad or insulating hardware.
High dI_F/dt capability	Rated for −200 A/µs (125°C); maintains stable recovery behavior in >100 kHz PFC controllers.
Low thermal resistance	2.6 °C/W junction-to-case enables 27 W conduction power dissipation at 80°C case temperature.

Applications

Server Power Supply PFC Stage

Industrial Motor Drive Input Rectifier

Use Scenario: 1U/2U server PSU with active CCM PFC stage delivering 800–1200 W at 96% efficiency.

IC Role / Device Role / Timing Role: Boost diode in interleaved or single-phase PFC converter; handles high dI_F/dt during MOSFET turn-on.

Use Value: Low Qrr and soft recovery reduce MOSFET switching loss by ≥15% vs. standard ultrafast diodes, enabling smaller heatsinks and higher power density.

Use Scenario: 3 kW AC drive input stage with universal AC input (380–480 V_AC) and regenerative braking.

IC Role / Device Role / Timing Role: Fast-recovery boost diode in auxiliary PFC or DC-link pre-charge circuit; operates under high ambient temperature (T_a ≤ 70°C).

Use Value: 150°C max junction temperature and 2.6 °C/W R_th(j-c) support reliable operation without forced air cooling in enclosed cabinets.

Telecom Rectifier Module

Renewable Energy Inverter Front-End

Use Scenario: -48 V telecom rectifier with high-efficiency PFC stage meeting Level VI efficiency standards.

IC Role / Device Role / Timing Role: Primary boost diode in critical conduction mode (CrCM) or transition mode (TM) PFC controller.

Use Value: 7 pF isolation capacitance minimizes leakage current into chassis ground, supporting strict safety compliance (IEC 62368-1).

Use Scenario: 5 kW string inverter with dual-stage topology: front-end PFC + isolated DC/DC conversion.

IC Role / Device Role / Timing Role: High-voltage boost diode in unidirectional PFC stage handling 600 V DC-link and rapid load transients.

Use Value: Matched die pairing ensures balanced voltage sharing across 600 V blocking, eliminating need for external balancing resistors or capacitors.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast insulated boost diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH8R06DJF	Same 600 V V_RRM, 8 A I_F(AV), but non-insulated TO-220FP package; R_th(j-c) = 3.5 °C/W; no 2500 V_RMS isolation.	Requires insulating washer and thermal pad; unsuitable where chassis-grounded heatsinking is mandatory.	Select when cost sensitivity outweighs isolation requirement and PCB layout permits insulated mounting.
IXYS MUR860E	600 V V_RRM, 8 A I_F(AV), non-tandem construction; trr = 35 ns (typ.), Sfactor ≈ 0.25; TO-220AC package.	Higher recovery loss and harder switching increase MOSFET stress; not optimized for high-dI_F/dt PFC.	Select only for lower-frequency (<65 kHz) or discontinuous-mode PFC where softness and speed are less critical.

Compared with STTH8R06DJF and IXYS MUR860E, the STTH806TTI uniquely combines tandem die voltage balancing, 2500 V_RMS insulation, and sub-15 ns trr-making it the only choice for high-density, high-reliability CCM PFC designs requiring zero external balancing and direct heatsink mounting.

Availability

STTH806TTI is available at Aetrix Electronics and suitable for server power supplies, industrial motor drives, telecom rectifiers, and renewable energy inverters requiring stable component supply and long-term lifecycle support.

Supply support for STTH806TTI 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, specializing in power management, analog, microcontrollers, and automotive ICs.

The TURBOSWITCH™ "H" family-including STTH806TTI-is engineered for ultra-fast, soft-recovery performance in high-efficiency AC/DC front-ends, particularly CCM PFC stages demanding minimal MOSFET stress and compact thermal solutions.

FAQ

What is the maximum recommended case temperature for continuous operation?

The STTH806TTI is rated for 150°C maximum junction temperature. With a total junction-to-case thermal resistance of 2.6 °C/W, continuous operation at 8 A average current requires case temperature ≤80°C to maintain safe thermal margin-verified by the 27 W conduction power dissipation rating at T_c = 80°C.

Does the STTH806TTI require external voltage balancing components?

No. Its tandem die architecture integrates two matched 300 V diodes in series, ensuring inherent voltage sharing across the 600 V blocking rating. STMicroelectronics specifies this eliminates the need for external balancing resistors or capacitors in typical PFC applications, as confirmed in the device description and major product characteristics section.

How does the softness factor of 0.4 impact system-level design?

A softness factor of 0.4 indicates controlled, gradual current decay during reverse recovery-reducing high-frequency ringing and electromagnetic interference. This lowers peak voltage overshoot on the switching MOSFET, decreasing snubber component size and count, and improving overall system reliability in high-dI_F/dt PFC converters.

Can the insulated tab be connected to system ground?

Yes-the metal tab is electrically isolated (2500 V_RMS) and may be safely bolted to a grounded heatsink or chassis without risk of short circuit. This simplifies mechanical assembly and improves thermal coupling, unlike non-insulated TO-220 variants that require mica washers or silicone pads for isolation.

STTH806TTI Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: TURBOSWITCH™

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Diode Configuration:: 1 Pair Series Connection

Technology:: Standard

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

Current - Average Rectified (Io) (per Diode):: 8A

Voltage - Forward (Vf) (Max) @ If:: 3.6 V @ 8 A

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

Reverse Recovery Time (trr):: 30 ns

Current - Reverse Leakage @ Vr:: 10 µA @ 600 V

Operating Temperature - Junction:: 150°C (Max)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB Insulated

STTH806TTI FAQ

1.How can I place an order for STTH806TTI through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH806TTI 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 STTH806TTI reliable?

The price and inventory of STTH806TTI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH806TTI is usually 5 days.

3.What payment methods are accepted for STTH806TTI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH806TTI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH806TTI?

STTH806TTI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH806TTI 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 STTH806TTI?

For technical support, including STTH806TTI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH806TTI requirements.

6.How does Aetrix verify that STTH806TTI is sourced from the original manufacturer or authorized distributors?

All STTH806TTI 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 STTH806TTI meets industry standards.

7.What is the process for return or replacement of STTH806TTI?

All STTH806TTI units undergo pre-shipment inspection (PSI). If there is an issue with STTH806TTI, 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 STTH806TTI part is unused and in its original packaging.

Return procedure for STTH806TTI:

1.Submit a request within 90 days.

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

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