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STMicroelectronics STTH802SFY
- Part No.:
- STTH802SFY
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
STTH802SFY.pdf
- Description:
- DIODE GEN PURP 200V 8A TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:18,465
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Product details
Overview
STTH802SFY from STMicroelectronics is an AEC-Q101-qualified ultrafast recovery silicon diode in PSMC (TO-277A) package, rated for 200 V repetitive peak reverse voltage and 8 A average forward current, with 17 ns typical reverse recovery time and 0.79 V typical forward voltage at 125 °C - deployed as freewheeling diode in automotive DC/DC converters.
For engineers reviewing the STTH802SFY datasheet, STTH802SFY pinout, STTH802SFY application, or STTH802SFY equivalent, key selection criteria include junction temperature capability up to 175 °C, wettable flanks for automated optical inspection, conduction loss performance at high ambient, and reverse recovery behavior under dIF/dt ≥200 A/µs in boost/snubber circuits.
Technical Context
This diode operates as a unidirectional power switching element with ultrafast soft recovery characteristics, optimized for high-frequency switching topologies where low trr and low Qrr minimize turn-off losses and EMI generation. Its 2.4 °C/W junction-to-case thermal resistance supports high-power density mounting on compact heatsinks.
The device maintains guaranteed VRRM across -40 °C to +175 °C and exhibits negligible switching losses due to low IRM (5.8–7.5 A) and Qrr (100 nC) at Tj = 125 °C, IF = 8 A, VR = 160 V, making it suitable for automotive-grade transient-tolerant power conversion stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - ensures reliable blocking during 160 V system transients in 12 V/48 V automotive architectures |
| IF(AV) | 8 A at Tc = 145 °C - enables continuous conduction mode operation in compact 1–3 kW DC/DC stages |
| trr (typ.) | 17 ns - reduces turn-off energy loss and voltage overshoot in >100 kHz switching applications |
| VF (typ.) | 0.79 V at Tj = 125 °C, IF = 8 A - lowers conduction loss to ~6.3 W at full load, improving thermal margin |
| Tj (max.) | 175 °C - allows direct integration into engine bay or powertrain control units without derating |
| Rth(j-c) | 2.4 °C/W - supports thermal design with minimal copper area under tab on FR4 PCB |
Pinout & Package
STTH802SFY uses the PSMC (TO-277A) surface-mount package: flat, dual-anode single-cathode configuration with wettable flanks and exposed thermal pad. Dimensions: 4.6 × 6.5 × 1.1 mm (L × W × H), weight 90 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 / Anode 2 | Parallel input terminals for forward current path | Dual-anode layout reduces effective series resistance and improves current sharing in high-pulse applications |
| Cathode | Common output terminal for forward conduction | Exposed metal tab serves as primary thermal and electrical return path; must be soldered to PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and chassis systems per stress test requirements including HTOL, TC, and UHAST |
| Wettable flanks | Side-wall plating enables automated optical inspection (AOI) of solder joint integrity without X-ray |
| ECOPACK®2 compliance | Lead-free, halogen-free, RoHS-compliant construction with no antimony or beryllium |
| Soft recovery (SFACTOR > 0.3) | Reduces EMI and voltage ringing during commutation, easing filter design in EMC-sensitive modules |
Applications
| DC/DC Converters | Reverse Polarity Protection |
|---|---|
Use Scenario: 48 V–12 V bidirectional buck-boost converter in mild-hybrid vehicle power distribution units. IC Role / Device Role / Timing Role: Freewheeling diode conducting during low-side switch off-time; handles 8 A continuous forward current with <17 ns recovery. Use Value: Enables >95% efficiency at 200 kHz switching while maintaining thermal stability up to 150 °C case temperature. | Use Scenario: Input protection circuit for ADAS domain controller powered from vehicle battery rail. IC Role / Device Role / Timing Role: Series-connected ultrafast diode blocking reverse voltage surges up to -200 V during jump-start or load-dump events. Use Value: Prevents damage to downstream SMPS ICs with zero forward voltage penalty (<0.8 V at 8 A, 125 °C). |
| Snubber Circuits | Boost Function |
Use Scenario: RCD snubber network across IGBTs in electric power steering motor inverter. IC Role / Device Role / Timing Role: Clamps voltage spikes during IGBT turn-off; recovers before next switching cycle at 10 kHz. Use Value: Limits peak voltage to <200 V with <35 ns trr, reducing snubber capacitor size by 40% vs. standard fast diodes. | Use Scenario: Boost diode in PFC front-end stage of onboard charger for BEV. IC Role / Device Role / Timing Role: Blocks reverse current during MOSFET on-time; conducts during off-time with minimal Qrr-induced losses. Use Value: Achieves 100 nC Qrr at 125 °C, cutting reverse recovery loss by 65% versus comparable 200 V Schottky alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MUR820E | Higher VF (0.95 V typ. @ 8 A, 25 °C); trr = 35 ns; TO-220AC package | Larger footprint, no wettable flanks, not AEC-Q101 qualified | Acceptable for non-automotive industrial DC/DC where thermal cycling reliability is less critical |
| Vishay VS-8EWH02FN-M3 | Same PSMC package; trr = 25 ns; VF = 0.82 V @ 125 °C; AEC-Q101 qualified | Slightly higher conduction loss; lower dIF/dt rating (150 A/µs vs. 200 A/µs) | Better fit for cost-sensitive automotive modules where 17 ns trr is not required |
Compared with MUR820E and VS-8EWH02FN-M3, STTH802SFY delivers the lowest combined conduction-recovery loss at high junction temperature and highest dIF/dt immunity - critical for 48 V system snubbers and high-frequency boost converters requiring PPAP documentation.
Availability
STTH802SFY is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse polarity protection circuits, and snubber networks requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for STTH802SFY 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.
STTH802SFY belongs to ST's automotive-qualified ultrafast diode product line, engineered specifically for high-reliability power conversion in electrified vehicle subsystems operating continuously at elevated junction temperatures.
FAQ
What is the maximum allowable case temperature for continuous operation?
The STTH802SFY is rated for 8 A average forward current at Tc = 145 °C per datasheet absolute ratings. Operation above this requires derating based on thermal resistance and PCB copper area; Rth(j-c) = 2.4 °C/W means 175 °C Tj corresponds to 137 °C Tc with 15 W dissipation.
Does STTH802SFY support automatic optical inspection (AOI)?
Yes - its PSMC (TO-277A) package features wettable flanks with IPC-compliant side-wall plating, enabling reliable solder-joint inspection using standard AOI systems without requiring X-ray verification.
How does STTH802SFY perform under high dIF/dt conditions?
At dIF/dt = –200 A/µs and Tj = 125 °C, STTH802SFY delivers IRM = 5.8–7.5 A and Qrr = 100 nC, with trr = 17 ns. Its soft recovery factor (SFACTOR > 0.3) suppresses voltage overshoot and EMI generation during rapid current reversal.
Is PPAP documentation available for STTH802SFY?
Yes - STTH802SFY is PPAP-capable per AIAG standards. Aetrix Electronics provides full PPAP Level 3 documentation packages upon request, including part submission warrant, design records, process flow diagrams, and test reports aligned with ST's automotive qualification data.
STTH802SFY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ECOPACK®2
- Package/Case:
- TO-277, 3-PowerDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 6 µA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
- Operating Temperature - Junction:
- -40°C ~ 175°C
STTH802SFY FAQ
1.How can I place an order for STTH802SFY through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH802SFY 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 STTH802SFY reliable?
The price and inventory of STTH802SFY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH802SFY is usually 5 days.
3.What payment methods are accepted for STTH802SFY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH802SFY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH802SFY?
STTH802SFY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH802SFY 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 STTH802SFY?
For technical support, including STTH802SFY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH802SFY requirements.
6.How does Aetrix verify that STTH802SFY is sourced from the original manufacturer or authorized distributors?
All STTH802SFY 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 STTH802SFY meets industry standards.
7.What is the process for return or replacement of STTH802SFY?
All STTH802SFY units undergo pre-shipment inspection (PSI). If there is an issue with STTH802SFY, 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 STTH802SFY part is unused and in its original packaging.
Return procedure for STTH802SFY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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