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

STMicroelectronics STTH810DI

Name: STTH810DI
Brand: STMicroelectronics
SKU: STTH810DI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH810DI

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-220-2

Datasheet:: STTH810DI.pdf

Description:: DIODE GEN PURP 1KV 8A TO220Ins

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Product details

Overview

STTH810DI from STMicroelectronics is an ultrafast recovery, high-voltage silicon rectifier diode in insulated TO-220 package, rated for 1000 V repetitive peak reverse voltage, 8 A average forward current at T_c = 105 °C, and 47 ns typical reverse recovery time (t_rr) at 125 °C. It delivers low conduction loss (V_F = 1.30 V typ. @ 8 A, 150 °C) and soft recovery behavior (S factor = 2), making it suitable for freewheeling and snubber circuits in industrial switch-mode power supplies.

For engineers reviewing the STTH810DI datasheet, STTH810DI pinout, STTH810DI application, or STTH810DI equivalent, this device is selected for high-reliability rectification where thermal robustness (T_j = 175 °C max), electrical isolation (2500 V_RMS), and fast, soft switching are critical - especially in motor drive DC bus clamping and auxiliary power supply demagnetization paths.

Technical Context

This diode employs a platinum-doped lifetime-controlled silicon structure to achieve ultrafast, soft reverse recovery with minimal tail current and low IRM (12–16 A peak reverse recovery current under harsh dI/dt = −200 A/µs conditions). Its design targets high-frequency operation up to several hundred kHz while maintaining low thermal impedance (R_th(j-c) = 4.1 °C/W) and stable leakage (<20 µA @ 125 °C).

The TO-220Ins package provides reinforced electrical insulation (2500 V_RMS, 7 pF capacitance) without requiring additional insulating hardware, enabling direct mounting to grounded heatsinks in high-voltage systems. Junction temperature derating is explicitly defined across 25–175 °C, supporting operation in thermally demanding industrial environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - Withstands repetitive reverse voltage up to 1 kV in DC bus clamp or output rectifier positions.
I_F(AV)	8 A @ T_c = 105 °C - Sustains continuous forward current in thermally constrained industrial PCB layouts.
t_rr (typ)	47 ns @ I_F = 8 A, dI/dt = −200 A/µs, V_R = 600 V, T_j = 125 °C - Enables efficient high-frequency switching with reduced EMI and switching loss.
V_F (typ)	1.30 V @ 8 A, 150 °C - Low forward drop minimizes conduction loss and thermal stress in high-duty-cycle applications.
R_th(j-c)	4.1 °C/W - Efficient heat transfer from junction to case supports reliable operation with standard heatsinking.
S factor	2 - Soft recovery reduces voltage overshoot and ringing during turn-off, easing snubber design.
I_R	<20 µA @ 125 °C - Low leakage preserves thermal stability and prevents runaway in parallel configurations.

Pinout & Package

STTH810DI uses the TO-220Ins package: insulated plastic housing with electrically isolated metal tab (2500 V_RMS isolation, 7 pF capacitance), 3-pin configuration, and recommended mounting torque of 0.55 N·m.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current entry point	Connected to high-side switching node (e.g., MOSFET drain) in freewheeling path; requires low-inductance layout.
Cathode (Lead 2)	Forward current exit point	Typically tied to DC bus or ground return; carries full load current and must handle pulsed I_FRM = 100 A.
Isolated Tab (Metal Backside)	Thermal interface / mechanical anchor	Electrically isolated from both terminals; mounts directly to heatsink without mica washer or sil-pad.

Key Features

Feature	Design Value
Ultrafast soft recovery	t_rr = 47 ns with S factor = 2 ensures low EMI and reduced voltage overshoot during turn-off.
High junction temperature rating	T_j(max) = 175 °C enables operation in sealed enclosures or high-ambient industrial environments.
Reinforced electrical insulation	2500 V_RMS isolation between tab and terminals eliminates need for insulating hardware in HV designs.
Low leakage current	<20 µA @ 125 °C improves thermal margin and reliability in parallel-connected or high-temperature deployments.
Platinum-doped silicon die	Ensures consistent t_rr, V_F, and IR reproducibility across production lots and temperature range.

Applications

Industrial SMPS Output Rectification

Motor Drive Freewheeling Diode

Use Scenario: Secondary-side rectification in 1–3 kW telecom or industrial AC/DC converters operating at 100–300 kHz.

IC Role / Device Role / Timing Role: High-voltage output rectifier handling 8 A DC with 1000 V reverse blocking.

Use Value: Ultrafast t_rr and soft recovery minimize switching losses and reduce snubber component count versus standard fast recovery diodes.

Use Scenario: Clamp/freewheel path across IGBT or MOSFET in 3-phase inverter stages for HVAC compressors or servo drives.

IC Role / Device Role / Timing Role: Freewheeling diode conducting inductive kickback during PWM off-time; exposed to high dI/dt (>200 A/µs).

Use Value: Low IRM (12–16 A) and soft recovery suppress voltage spikes, protecting switching devices without oversized snubbers.

Snubber Network Diode

Bootstrap Supply Demagnetization

Use Scenario: RCD snubber in flyback or forward converter primary side, absorbing leakage energy during MOSFET turn-off.

IC Role / Device Role / Timing Role: Fast-turn-on, fast-turn-off diode conducting short, high-peak current pulses (t_p < 100 ns).

Use Value: 47 ns t_rr and low Q_rr ensure rapid charge removal from snubber capacitor, improving energy recycling efficiency.

Use Scenario: Demagnetization path for bootstrap inductor in high-side gate driver ICs used with N-channel MOSFETs in half-bridge topologies.

IC Role / Device Role / Timing Role: Provides controlled discharge path for bootstrap capacitor after high-side switch turn-on, preventing overvoltage.

Use Value: Low V_F (1.30 V) and soft recovery prevent oscillation and ensure clean bootstrap capacitor reset under varying load conditions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH8R06D	V_RRM = 600 V, t_rr = 35 ns (typ), TO-220AC (non-insulated)	Lacks 2500 V_RMS isolation; unsuitable where tab-to-heatsink isolation is required.	Select when system voltage ≤600 V and mechanical isolation is handled externally.
IXYS MUR8100E	V_RRM = 1000 V, t_rr = 60 ns (typ), TO-220AC, no insulation rating specified	No certified 2500 V_RMS isolation; higher t_rr increases switching loss at >200 kHz.	Acceptable for non-isolated, cost-sensitive designs where 13 ns slower recovery is tolerable.

Compared with STTH8R06D and MUR8100E, STTH810DI uniquely combines 1000 V rating, sub-50 ns t_rr, soft recovery, and certified 2500 V_RMS isolation - making it the only choice for insulated, high-reliability 1 kV freewheeling in industrial inverters and medical-grade PSUs.

Availability

STTH810DI is available at Aetrix Electronics and suitable for industrial power supplies, motor control inverters, and high-reliability auxiliary power modules requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for STTH810DI 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.

STTH810DI belongs to ST's STTH ultrafast diode product line, engineered specifically for high-efficiency, high-reliability rectification and freewheeling in industrial switch-mode power conversion and motor control systems.

FAQ

What is the maximum allowable mounting torque for the STTH810DI TO-220Ins package?

The recommended torque value for STTH810DI's mounting screw is 0.55 N·m, with a maximum allowable torque of 0.7 N·m. Exceeding 0.7 N·m risks cracking the insulated housing or deforming the lead frame, compromising both electrical isolation and thermal performance. Torque must be applied using a calibrated tool on a flat, rigid heatsink surface.

Can STTH810DI be used in parallel configurations?

Yes, STTH810DI supports parallel operation due to its low and tightly controlled forward voltage drop (V_F = 1.30–1.70 V across temperature and current) and low leakage (<20 µA @ 125 °C), which minimizes current imbalance. However, matched layout symmetry, identical heatsinking, and external ballasting resistors (0.01–0.02 Ω) are required to ensure thermal and dynamic current sharing.

Does STTH810DI meet RoHS and REACH requirements?

Yes, STTH810DI is manufactured in ST's ECOPACK®-compliant process with lead-free second-level interconnects and conforms to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The inner box label and package marking indicate compliance per JEDEC Standard JESD97, including maximum soldering temperature ratings.

How does the softness factor (S = 2) impact circuit design?

A softness factor of 2 indicates controlled, gradual current decay during reverse recovery - reducing di/dt-induced voltage overshoot and electromagnetic interference. This allows smaller snubber capacitors and lower gate resistor values in adjacent MOSFETs, simplifying layout and improving overall system efficiency compared to hard-recovery diodes (S < 1.5).

STTH810DI Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-2

Packaging:: Tube

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 V

Current - Average Rectified (Io):: 8A

Voltage - Forward (Vf) (Max) @ If:: 2 V @ 8 A

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

Reverse Recovery Time (trr):: 85 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 1000 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220Ins

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

STTH810DI FAQ

1.How can I place an order for STTH810DI through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH810DI 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 STTH810DI reliable?

The price and inventory of STTH810DI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH810DI is usually 5 days.

3.What payment methods are accepted for STTH810DI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH810DI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH810DI?

STTH810DI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH810DI 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 STTH810DI?

For technical support, including STTH810DI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH810DI requirements.

6.How does Aetrix verify that STTH810DI is sourced from the original manufacturer or authorized distributors?

All STTH810DI 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 STTH810DI meets industry standards.

7.What is the process for return or replacement of STTH810DI?

All STTH810DI units undergo pre-shipment inspection (PSI). If there is an issue with STTH810DI, 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 STTH810DI part is unused and in its original packaging.

Return procedure for STTH810DI:

1.Submit a request within 90 days.

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

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