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

STMicroelectronics STTH810D

Name: STTH810D
Brand: STMicroelectronics
SKU: STTH810D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH810D

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-220-2

Datasheet:: STTH810D.pdf

Description:: DIODE GEN PURP 1KV 8A TO220AC

Quantity:: RFQ Add To RFQ list

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Inventory:570

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Product details

Overview

STTH810D from STMicroelectronics is an ultrafast recovery, high-voltage silicon rectifier diode in TO-220AC package, rated for 1000 V repetitive peak reverse voltage, 8 A average forward current at Tc = 130 °C, and 47 ns typical reverse recovery time at 125 °C with dIF/dt = –200 A/µs. It serves as a primary freewheeling or output rectifier in industrial switch-mode power supplies and motor drive snubber circuits.

For engineers reviewing the STTH810D datasheet, STTH810D pinout, STTH810D application, or STTH810D equivalent, key selection criteria include soft recovery behavior (S factor = 2), low conduction loss (VF = 1.30 V typ. @ 150 °C), thermal robustness (Tj max = 175 °C), and insulation-free mounting compatibility with standard TO-220 heatsinks.

Technical Context

This diode employs optimized epitaxial silicon design to achieve ultrafast, soft reverse recovery-critical for minimizing EMI and voltage overshoot in high-frequency hard-switched converters. Its dynamic performance is characterized by low IRM (12–16 A) and controlled Qrr under high dIF/dt conditions (–200 A/µs), enabling reliable operation in 50–100 kHz PFC and DC-DC stages.

Thermal design is supported by a low junction-to-case thermal resistance of 2.5 °C/W (TO-220AC), allowing sustained 8 A conduction at 130 °C case temperature. The device maintains stable VF (1.3–1.7 V) and trr (47–65 ns) across –65 to +175 °C operating range, ensuring predictable behavior in wide-temperature industrial environments.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	1000 V - Withstands 1 kV repetitive reverse voltage without breakdown; suitable for 800 V DC bus applications with safety margin.
IF(AV)	8 A @ Tc = 130 °C - Sustains continuous 8 A forward current when mounted on heatsink maintaining 130 °C case temperature.
trr (typ)	47 ns @ Tj = 125 °C, dIF/dt = –200 A/µs - Enables efficient operation in 50–100 kHz switching topologies with minimal switching loss.
VF (typ)	1.30 V @ Tj = 150 °C, IF = 8 A - Low forward drop reduces conduction loss and thermal stress in high-current rectification paths.
S factor	2 - Soft recovery minimizes voltage ringing and EMI during turn-off; avoids destructive oscillations in inductive loads.
Rth(j-c)	2.5 °C/W - Enables direct thermal coupling to heatsink; supports compact thermal design without forced air cooling.
IR (max)	20 µA @ Tj = 125 °C, VR = VRRM - Low leakage preserves efficiency and prevents thermal runaway in high-temperature operation.

Pinout & Package

STTH810D uses the standard TO-220AC package (non-insulated, single-tab metal case). Mounting requires mechanical torque of 0.55 Nm (max 0.7 Nm); tab is electrically connected to cathode.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current entry terminal	Connected to AC input or switching node; must withstand full reverse voltage when off.
Cathode (Tab & Lead 2)	Forward current exit / common return	Electrically tied to metal tab; requires insulating washer only if heatsink is grounded or shared with other potentials.

Key Features

Feature	Design Value
Ultrafast soft recovery	trr = 47 ns with S factor = 2 ensures low EMI and reduced snubber losses in hard-switched converters.
High junction temperature rating	Tj(max) = 175 °C enables reliable operation in sealed enclosures or high-ambient industrial environments.
Low conduction loss	VF = 1.30 V @ 150 °C reduces I²R heating and improves system efficiency at full load.
Robust surge capability	IFSM = 60 A (10 ms sinusoidal) supports motor startup surges and transient overloads without degradation.
ECOPACK® compliance	Lead-free second-level interconnect meets RoHS and JEDEC JESD97 marking requirements for green manufacturing.

Applications

Industrial SMPS Rectification

Motor Drive Freewheeling

Use Scenario: Output rectification in 3 kW telecom or server PSUs operating at 70–100 kHz with 400–800 V DC bus.

IC Role / Device Role / Timing Role: High-voltage output diode handling continuous 8 A DC current and fast turn-off during PWM dead-time.

Use Value: 47 ns trr and soft recovery reduce voltage spikes across MOSFETs, lowering snubber component stress and improving overall efficiency by ~0.4%.

Use Scenario: Freewheeling path in 3-phase IGBT-based VFDs driving HVAC compressors or pumps.

IC Role / Device Role / Timing Role: Clamp inductive kickback during IGBT turn-off; conducts flyback current for up to 10 ms per cycle.

Use Value: 60 A non-repetitive surge rating and 175 °C Tj support intermittent overload conditions without thermal derating.

Snubber Network Diode

Bootstrap Supply Rectifier

Use Scenario: RCD snubber in LLC resonant converter primary-side clamp circuit with 600 V peak voltage.

IC Role / Device Role / Timing Role: Fast, low-loss path for snubber capacitor discharge; operates at high dIF/dt (>100 A/µs).

Use Value: Low Qrr (1.2 µC typ.) and soft recovery minimize energy dissipation in snubber resistor, reducing thermal footprint by 30% vs. standard FRD.

Use Scenario: High-side gate driver bootstrap supply in half-bridge motor controllers using 12 V logic rails.

IC Role / Device Role / Timing Role: Unidirectional charging path for bootstrap capacitor; blocks reverse current during high-side FET conduction.

Use Value: 1.30 V VF at 150 °C ensures stable bootstrap voltage under elevated ambient, preventing gate drive dropout during thermal stress.

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	VRRM = 600 V, trr = 35 ns, VF = 1.25 V @ 150 °C	Limited to ≤600 V bus systems; faster recovery but lower voltage margin	Select when 600 V rating suffices and lowest possible trr is prioritized over voltage headroom.
IXYS MUR810E	VRRM = 1000 V, trr = 60 ns, VF = 1.35 V @ 125 °C, TO-220AC	Higher trr and VF at elevated temperature; no softness factor specified	Choose for legacy designs where MUR-series qualification is required; expect higher EMI and thermal margin reduction.

Compared with STTH8R06D and IXYS MUR810E, STTH810D uniquely balances 1000 V rating, 47 ns trr at 125 °C, and documented soft recovery (S = 2), making it optimal for new industrial power designs demanding both voltage margin and EMI control.

Availability

STTH810D is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, motor drive inverters, and snubber networks requiring stable component supply, long-lifecycle availability, and traceable sourcing.

Supply support for STTH810D 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.

STTH810D belongs to ST's Ultrafast Recovery Diode (URD) product line, engineered specifically for high-efficiency, high-reliability industrial power conversion where low switching loss, thermal resilience, and EMI control are critical.

FAQ

What is the maximum recommended mounting torque for STTH810D?

The STTH810D TO-220AC package specifies a recommended torque value of 0.55 Nm, with a maximum allowable torque of 0.7 Nm. Exceeding 0.7 Nm risks mechanical damage to the leadframe or internal bond wires, potentially causing premature failure under thermal cycling. Use calibrated torque screwdrivers for production assembly.

Does STTH810D require electrical isolation from the heatsink?

No - STTH810D uses the TO-220AC (non-insulated) package, meaning its metal tab is electrically connected to the cathode. Isolation is only needed if the heatsink is grounded or referenced to a different potential than the cathode net. For floating or shared-ground heatsinks, direct mounting is permitted and thermally optimal.

How does STTH810D's softness factor impact circuit reliability?

A softness factor (S) of 2 means the diode's reverse recovery current decays gradually rather than abruptly, suppressing high-frequency ringing and voltage overshoot across switching devices. This directly reduces stress on adjacent MOSFETs/IGBTs and lowers EMI filter requirements, enhancing long-term reliability in high-dI/dt applications like motor drives.

Can STTH810D replace STTH810DI in a design?

No - STTH810DI uses the insulated TO-220Ins package (2500 VRMS isolation, 7 pF capacitance), while STTH810D is non-insulated TO-220AC. Substitution requires verifying heatsink grounding, creepage/clearance compliance, and whether isolation is mandated by safety standards (e.g., IEC 62368-1). Electrical specs are identical, but mechanical and safety roles differ fundamentally.

STTH810D 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-220AC

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

STTH810D FAQ

1.How can I place an order for STTH810D through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH810D 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 STTH810D reliable?

The price and inventory of STTH810D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH810D is usually 5 days.

3.What payment methods are accepted for STTH810D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH810D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH810D?

STTH810D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH810D 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 STTH810D?

For technical support, including STTH810D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH810D requirements.

6.How does Aetrix verify that STTH810D is sourced from the original manufacturer or authorized distributors?

All STTH810D 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 STTH810D meets industry standards.

7.What is the process for return or replacement of STTH810D?

All STTH810D units undergo pre-shipment inspection (PSI). If there is an issue with STTH810D, 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 STTH810D part is unused and in its original packaging.

Return procedure for STTH810D:

1.Submit a request within 90 days.

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

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