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

STMicroelectronics STTH802B

Name: STTH802B
Brand: STMicroelectronics
SKU: STTH802B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH802B

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: STTH802B.pdf

Description:: DIODE GEN PURP 200V 8A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STTH802B from STMicroelectronics is an ultrafast recovery silicon diode optimized for high-frequency switching applications including freewheeling, polarity protection, and base drive circuits in low-voltage inverters. It features 200 V repetitive peak reverse voltage (V_RRM), 8 A average forward current (I_F(AV)), 17 ns typical reverse recovery time (t_rr), 0.95 V typical forward voltage at 8 A and 25 °C, and a maximum junction temperature of 175 °C.

For engineers reviewing the STTH802B datasheet, STTH802B pinout, STTH802B application, or STTH802B equivalent, key selection criteria include ultrafast t_rr performance under high dI/dt conditions, thermal robustness in TO-220FPAC/DPAK packages, conduction loss modeling via P = 0.73 × I_F(AV) + 0.021 × I_F(RMS)², and ECOPACK®2 compliance for industrial-grade reliability.

Technical Context

This diode employs ST's 200 V planar platinum-doped technology to achieve negligible switching losses and low forward/reverse recovery times. Its dynamic behavior is characterized by t_rr = 17 ns (at I_F = 1 A, dI/dt = −100 A/µs, V_R = 30 V) and I_RM = 5.5–7.0 A (at I_F = 8 A, dI/dt = −200 A/µs, V_R = 160 V, T_j = 125 °C).

Thermal design is enabled by R_th(j–c) = 3.2 °C/W (TO-220AC/DPAK/D²PAK) or 5.5 °C/W (TO-220FPAC), supporting high-power-density layouts. The insulated TO-220FPAC variant provides 2000 V_RMS isolation, while all variants meet UL 94 V0 epoxy flammability rating.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse blocking voltage without breakdown; enables use in 100–150 V DC bus systems with safety margin.
I_F(AV)	8 A at T_C = 145 °C (TO-220AC/DPAK/D²PAK) - Continuous forward current capability under heatsink-limited thermal conditions.
t_rr (typ.)	17 ns - Ultrafast recovery minimizes switching loss and EMI in >100 kHz SMPS and motor drive freewheel paths.
V_F (typ.)	0.95 V at I_F = 8 A, T_j = 25 °C - Low conduction loss directly reduces power dissipation and thermal load in high-current paths.
T_j(max)	175 °C - High junction temperature rating supports operation in compact enclosures or elevated ambient environments up to 125 °C.
R_th(j–c)	3.2 °C/W (DPAK) - Enables efficient heat transfer to PCB copper or heatsink; critical for sustained 8 A operation without derating.
I_FSM	100 A (10 ms sine) - Withstands short-circuit or startup surge currents in inverter half-bridges and DC–DC converters.

Pinout & Package

STTH802B is supplied in DPAK (TO-252) surface-mount package with three terminals: Anode (A), Cathode (K), and exposed thermal pad (Tab). The Tab is electrically connected to the cathode and must be soldered to a large copper pour for thermal and electrical integrity.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to positive side of source/load; polarity-sensitive for rectification and freewheeling direction.
Cathode (K) / Tab	Forward current exit & thermal path	Electrically tied to cathode; requires low-impedance PCB copper connection for both current return and heat dissipation.

Key Features

Feature	Design Value
Ultrafast t_rr = 17 ns	Reduces turn-off energy loss and voltage overshoot during hard-switching in 100–500 kHz DC–DC topologies.
Low V_F = 0.95 V @ 8 A	Lowers conduction loss to ~7.6 W at full load, easing thermal management vs. standard fast diodes (V_F > 1.1 V).
ECOPACK®2 compliance	Meets RoHS, halogen-free, and lead-free assembly requirements for industrial and automotive-qualified production.
Insulated TO-220FPAC option	2000 V_RMS isolation eliminates need for additional insulating hardware in high-side gate drive or isolated DC–DC designs.
R_th(j–c) = 3.2 °C/W (DPAK)	Enables 8 A continuous operation with ≤40 °C temperature rise above case when mounted on ≥25 cm² 2-oz copper.

Applications

Motor Drive Freewheeling

Solar Microinverter Output Rectification

Use Scenario: Bidirectional current path across IGBTs in 3-phase BLDC or PMSM motor drives operating at 20–100 kHz PWM frequency.

IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current recirculation during IGBT off-time; t_rr < 25 ns prevents reverse recovery snap-off and shoot-through risk.

Use Value: 17 ns t_rr and 0.95 V V_F reduce total switching+conduction loss by ~35% versus standard fast diodes, improving inverter efficiency from 96.2% to 97.1% at 5 kW.

Use Scenario: Output stage of transformerless solar microinverters converting 40–60 V DC to 230 V AC, requiring high-reliability, low-leakage rectification.

IC Role / Device Role / Timing Role: Synchronous rectifier replacement in high-frequency LLC or SiC-based output stage; handles bidirectional reverse-biased stress up to 200 V.

Use Value: 6 µA max reverse leakage at 25 °C and 200 V ensures minimal no-load power loss; ECOPACK®2 compliance supports 25-year field life in outdoor PV environments.

Industrial DC–DC Converter Clamping

Automotive On-Board Charger (OBC) Polarity Protection

Use Scenario: Clamp diode across MOSFETs in 48 V–12 V buck converters for telecom and server power supplies operating at 300–600 kHz.

IC Role / Device Role / Timing Role: Snubber diode absorbing inductive kickback energy; low t_fr (150 ns) and V_FP (1.5 V) limit voltage spikes during fast turn-on.

Use Value: 150 ns forward recovery time prevents temporary open-circuit condition during transient load steps, maintaining stable regulation under 10 A/µs slew rates.

Use Scenario: Reverse-polarity protection in 6.6 kW OBC input stage, where battery connection errors must be blocked without fuse blow or system shutdown.

IC Role / Device Role / Timing Role: Series-blocking diode in high-current DC input path; rated for 100 A non-repetitive surge to survive jump-start events.

Use Value: 100 A I_FSM withstands 10 ms automotive jump-start surges; 175 °C T_j(max) ensures functionality in engine-bay ambient up to 125 °C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH8R06D	600 V V_RRM, 8 A I_F(AV), t_rr = 35 ns (typ.), VF = 1.7 V (typ. @ 8 A)	Higher voltage rating suits 300–400 V DC link applications but increases conduction loss and EMI in 200 V systems.	Select only if system requires >200 V reverse blocking; avoid for 100–200 V bus due to higher V_F and slower t_rr.
VS-8EWH06FN-M3	600 V V_RRM, 8 A I_F(AV), t_rr = 25 ns (typ.), VF = 1.45 V (typ. @ 8 A), TO-252AA package	Same DPAK footprint but higher V_F and t_rr; not ECOPACK®2 compliant; lacks 175 °C rating.	Acceptable for cost-sensitive 600 V designs where 175 °C operation or RoHS/halogen-free compliance is not required.

Compared with STTH8R06D and VS-8EWH06FN-M3, STTH802B delivers optimal balance of ultrafast recovery (17 ns), low conduction loss (0.95 V), and industrial-grade thermal/eco-compliance - making it the preferred choice for 200 V, high-efficiency, high-reliability switching applications.

Availability

STTH802B is available at Aetrix Electronics and suitable for motor drive freewheeling, solar microinverter rectification, and industrial DC–DC converter clamping requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STTH802B 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, MCU, and sensor solutions for industrial, automotive, and consumer markets.

STTH802B belongs to ST's ultrafast recovery diode product line, engineered specifically for high-frequency switching efficiency and thermal resilience in power conversion systems operating up to 500 kHz.

FAQ

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

The STTH802B DPAK variant supports I_F(AV) = 8 A at T_C = 145 °C, confirmed in Table 2 of the datasheet. This requires a minimum 25 cm² 2-ounce copper pour with thermal vias to maintain case temperature ≤145 °C under full load. Derating is necessary above this temperature.

Does STTH802B have a built-in thermal protection mechanism?

No, STTH802B is a passive discrete diode without integrated thermal sensing or shutdown circuitry. System-level thermal protection must be implemented externally using thermistors or controller-based junction temperature estimation based on R_th(j–c) = 3.2 °C/W and measured case temperature.

Can STTH802B replace a Schottky diode in a 200 V application?

No - STTH802B is a PN junction ultrafast diode, not a Schottky. While it matches 200 V V_RRM, its 0.95 V V_F is higher than typical Schottky diodes (<0.5 V), and it exhibits reverse recovery charge (Q_rr), unlike zero-Q_rr Schottkys. Use only where PN diode characteristics are acceptable.

Is the DPAK variant (STTH802B-TR) pin-compatible with STTH802D (TO-220AC)?

No - STTH802B-TR uses DPAK (TO-252) surface-mount packaging with Anode/Cathode/Tab layout, while STTH802D uses through-hole TO-220AC with Anode/Tab/Cathode pinout. Mechanical and thermal mounting differ significantly; PCB redesign is required for substitution.

STTH802B Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tube

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 8A

Voltage - Forward (Vf) (Max) @ If:: 1.05 V @ 8 A

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

Reverse Recovery Time (trr):: 30 ns

Current - Reverse Leakage @ Vr:: 6 µA @ 200 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

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

STTH802B FAQ

1.How can I place an order for STTH802B through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH802B 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 STTH802B reliable?

The price and inventory of STTH802B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH802B is usually 5 days.

3.What payment methods are accepted for STTH802B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH802B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH802B?

STTH802B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH802B 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 STTH802B?

For technical support, including STTH802B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH802B requirements.

6.How does Aetrix verify that STTH802B is sourced from the original manufacturer or authorized distributors?

All STTH802B 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 STTH802B meets industry standards.

7.What is the process for return or replacement of STTH802B?

All STTH802B units undergo pre-shipment inspection (PSI). If there is an issue with STTH802B, 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 STTH802B part is unused and in its original packaging.

Return procedure for STTH802B:

1.Submit a request within 90 days.

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

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