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STMicroelectronics STTH802D
- Part No.:
- STTH802D
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
STTH802D.pdf
- Description:
- DIODE GEN PURP 200V 8A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:13
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Product details
Overview
STTH802D from STMicroelectronics is an ultrafast recovery silicon diode in TO-220AC package, rated for 200 V repetitive peak reverse voltage and 8 A average forward current at 145 °C case temperature. It delivers low conduction losses (VF typ. 0.95 V @ 25 °C, 8 A), negligible switching losses, and fast reverse recovery time (trr typ. 17 ns @ 125 °C, dIF/dt = −100 A/µs), making it suitable for high-frequency freewheeling and polarity protection in low-voltage inverters.
For engineers reviewing the STTH802D datasheet, STTH802D pinout, STTH802D application, or STTH802D equivalent, key selection criteria include junction-to-case thermal resistance (3.2 °C/W), insulated mounting capability, 175 °C maximum junction temperature, and compatibility with high-dI/dt switching waveforms in SMPS base-drive circuits.
Technical Context
This diode employs ST's planar platinum-doped technology to achieve precise carrier lifetime control, enabling stable ultrafast recovery performance across temperature and load conditions. Its low forward voltage drop and minimal reverse recovery charge (Qrr typ. ~35 nC @ IF = 8 A, VR = 160 V, Tj = 125 °C) reduce power dissipation in hard-switched topologies.
The device operates reliably up to 175 °C junction temperature and supports surge currents up to 100 A (10 ms sine half-cycle). Its TO-220AC package provides direct heatsink mounting with 0.55 N·m recommended torque and 2000 VRMS insulation rating when used with insulating hardware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Withstands repetitive reverse voltages up to 200 V without breakdown, suitable for 12–48 V DC bus systems with margin. |
| IF(AV) | 8 A @ TC = 145 °C - Sustains continuous forward current of 8 A with proper heatsinking at case temperature ≤145 °C. |
| VF (typ.) | 0.95 V @ 25 °C, 8 A - Low conduction loss reduces I²R heating and improves efficiency in high-current freewheel paths. |
| trr (typ.) | 17 ns @ Tj = 125 °C, dIF/dt = −100 A/µs - Enables operation in >100 kHz switching converters with minimal switching loss and EMI. |
| Rth(j-c) | 3.2 °C/W - Enables predictable thermal design: ΔTjc = 3.2 × Pdiss, critical for sizing external heatsinks. |
| Tj (max.) | 175 °C - Supports extended operation in thermally constrained industrial and automotive under-hood environments. |
| IRM (typ.) | 5.5 A @ Tj = 125 °C - Peak reverse recovery current remains bounded, reducing stress on driving transistors and snubber components. |
Pinout & Package
TO-220AC package: 3-pin through-hole outline with isolated tab (electrically connected to cathode), designed for mechanical mounting to heatsinks using insulating hardware. Tab serves as cathode terminal; anode and cathode pins are on leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Tab (Metal Surface) | Cathode | Primary heat path and electrical cathode connection; requires insulating washer when mounted to grounded heatsink. |
| Lead 1 (Left) | Anode | Input terminal for forward current flow; soldered to PCB or busbar in high-current paths. |
| Lead 2 (Right) | Cathode | Secondary cathode connection for low-inductance return routing; redundant to tab but used in non-isolated layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery | trr ≤ 30 ns across full operating range ensures minimal turn-off loss in high-frequency SMPS and motor drives. |
| High junction temperature rating | 175 °C max Tj allows reliable operation in sealed enclosures or near heat-generating components without derating. |
| Low VF and Qrr trade-off | Optimized Pt doping yields 0.95 V VF and ~35 nC Qrr - balances conduction and switching loss better than standard fast recovery diodes. |
| ECOPACK®2 compliance | Meets RoHS and halogen-free requirements for DPAK/D²PAK variants; TO-220AC version complies per ST's environmental program. |
Applications
| DC-DC Converter Freewheeling | Solar Microinverter Output Stage |
|---|---|
Use Scenario: Used as freewheeling diode in synchronous buck converter output stage operating at 200–500 kHz. IC Role / Device Role: Provides low-loss current recirculation path during high-side switch off-time. Use Value: 17 ns trr and 0.95 V VF minimize energy loss per cycle, improving converter efficiency by ≥0.4% at 8 A load vs. standard FRD. | Use Scenario: Mounted on heatsink in microinverter AC output H-bridge leg for unidirectional current clamping. IC Role / Device Role: Polarity protection and reactive current handling during grid-synchronization transitions. Use Value: 100 A IFSM withstands inverter startup surges; 175 °C Tj rating supports operation in compact, passively cooled enclosures. |
| Automotive HVAC Blower Driver | Industrial PLC Output Module |
Use Scenario: Freewheeling path in 24 V brushed DC motor driver with PWM frequency up to 25 kHz. IC Role / Device Role: Suppresses inductive kickback from motor windings during PWM turn-off. Use Value: 3.2 °C/W Rth(j-c) enables direct bolt-down heatsinking; 200 V VRRM provides margin against 48 V system transients. | Use Scenario: Reverse-polarity protection diode on 24 V DC output terminals of programmable logic controller modules. IC Role / Device Role: Prevents damage from accidental reverse wiring during field installation or maintenance. Use Value: TO-220AC mechanical robustness and 8 A IF(AV) support sustained 5 A output loads with safety margin and long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06D | 600 V VRRM, same TO-220AC package, higher VF (1.25 V typ.), slower trr (35 ns typ.) | Designed for higher bus voltage systems (e.g., 380 V PFC); less efficient at 24–48 V due to higher conduction loss | Select only if 600 V blocking is required; avoid for 200 V-class designs where STTH802D's lower VF and faster trr improve efficiency |
| IXYS MUR820 | Same 200 V/8 A rating, TO-220AC, trr = 35 ns (typ.), VF = 0.93 V (typ.), Rth(j-c) = 3.0 °C/W | Higher trr increases switching loss in >100 kHz designs; slightly better thermal resistance but inferior dynamic performance | Acceptable for <100 kHz applications; STTH802D preferred where dI/dt exceeds 50 A/µs or layout EMI sensitivity is high |
Compared with STTH8R06D and MUR820, STTH802D offers the lowest combined conduction–switching loss profile in 200 V, high-dI/dt applications-critical for compact, high-efficiency power stages where thermal headroom and EMI are constrained.
Availability
STTH802D is available at Aetrix Electronics and suitable for DC-DC converter freewheeling, automotive HVAC blower drivers, and industrial PLC output modules requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for STTH802D 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The STTH series targets high-efficiency power conversion with ultrafast recovery diodes optimized for SMPS, motor drives, and renewable energy inverters-emphasizing low Qrr/VF trade-offs and rugged thermal performance.
FAQ
Is STTH802D electrically isolated in TO-220AC package?
No-the TO-220AC variant has an electrically active tab connected to the cathode. Isolation requires use of insulating hardware (e.g., mica washer + nylon screw) between tab and heatsink. For fully insulated mounting, STTH802FP (TO-220FPAC) is specified with 2000 VRMS isolation.
What is the maximum allowable dI/dt for STTH802D in hard-switching applications?
Test data shows stable operation up to −100 A/µs (trr = 17 ns typ. at Tj = 125 °C). At −200 A/µs, trr increases to ~22 ns and IRM rises to 7.0 A-still within safe operating area if heatsink and layout limit Tj ≤ 150 °C.
Can STTH802D replace standard FRD (e.g., BYV26E) in existing 100 kHz flyback designs?
Yes-its lower VF (0.95 V vs. 1.15 V) and faster trr (17 ns vs. 50 ns) reduce both conduction and switching losses. Ensure PCB footprint matches TO-220AC pin spacing (2.54 mm lead pitch) and verify thermal interface meets 3.2 °C/W requirement.
Does STTH802D require snubber circuitry in 200 kHz half-bridge configurations?
Not typically-its low Qrr (~35 nC) and controlled IRM suppress voltage overshoot effectively. Snubbers may still be needed for layout-induced ringing, but STTH802D eliminates the need for RC snubbers solely to manage diode recovery stress.
STTH802D 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):
- 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:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- 175°C (Max)
STTH802D FAQ
1.How can I place an order for STTH802D through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH802D 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 STTH802D reliable?
The price and inventory of STTH802D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH802D is usually 5 days.
3.What payment methods are accepted for STTH802D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH802D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH802D?
STTH802D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH802D 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 STTH802D?
For technical support, including STTH802D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH802D requirements.
6.How does Aetrix verify that STTH802D is sourced from the original manufacturer or authorized distributors?
All STTH802D 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 STTH802D meets industry standards.
7.What is the process for return or replacement of STTH802D?
All STTH802D units undergo pre-shipment inspection (PSI). If there is an issue with STTH802D, 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 STTH802D part is unused and in its original packaging.
Return procedure for STTH802D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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