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STMicroelectronics STTH806G
- Part No.:
- STTH806G
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STTH806G.pdf
- Description:
- DIODE GEN PURP 600V 8A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:9,125
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Product details
Overview
STTH806G from STMicroelectronics is an ultrafast 600 V, 8 A high-voltage rectifier diode in TO-220AC insulated package, optimized for switching power supplies and industrial AC/DC converters. It delivers 1.1 V typical forward voltage at 150 °C, 35 ns max reverse recovery time, and 2500 VRMS insulation rating for enhanced safety in isolated topologies.
For engineers reviewing the STTH806G datasheet, STTH806G pinout, STTH806G application, or STTH806G equivalent, key selection criteria include its low trr (35 ns), low thermal resistance (4 °C/W junction-to-case), high Tj rating (175 °C), and insulated package suitability for Class I safety-critical designs.
Technical Context
The STTH806G employs ST's Turbo 2 silicon technology to achieve soft-recovery characteristics with S-factor >1.0 across dIF/dt up to 500 A/µs, minimizing EMI in high-frequency SMPS. Its low IR (20 µA at 150 °C) and stable VF over temperature reduce conduction loss drift in thermally demanding environments.
Designed for hard-switched PFC and output rectification stages, it supports peak surge currents up to 90 A (10 ms sinusoidal) and operates reliably at junction temperatures up to 175 °C, enabling compact heatsink designs in 1–3 kW industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - Withstands repetitive reverse voltage in boost PFC and flyback primary-side rectification without breakdown. |
| IF(AV) | 8 A at Tc = 120 °C - Sustains continuous DC output current in 500–1000 W offline SMPS with standard heatsinking. |
| trr (max) | 35 ns - Enables operation at ≥100 kHz switching frequencies while limiting switching losses and ringing. |
| VF (typ) | 1.10 V at IF = 8 A, Tj = 150 °C - Reduces conduction loss to ~8.8 W per diode in high-temp operation. |
| Rth(j-c) | 4 °C/W - Allows direct mounting to heatsink with predictable thermal rise; enables <100 °C junction rise at 8 A. |
| Isolation | 2500 VRMS - Meets reinforced insulation requirements for EN 60950-1/EN 62368-1 in secondary-side isolation barriers. |
| CJ (typ) | 7 pF at VR = 30 V - Minimizes capacitive coupling noise in gate-drive or feedback paths near high-dv/dt nodes. |
Pinout & Package
TO-220AC Insulated package with electrically isolated metal tab (no internal connection to cathode/anode). Mounting hole accepts M3 screw; recommended torque: 0.80 Nm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to AC input or transformer secondary; carries full load current during forward conduction. |
| Cathode (Lead 2) | Output current exit point | Connected to bulk capacitor or output rail; defines reference node for voltage clamping and snubber design. |
| Tab (isolated) | Thermal interface only | Electrically floating metal surface for heatsink attachment; no circuit connection-enables safe mounting to chassis ground. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast soft recovery | trr ≤ 35 ns with S-factor >1.0 ensures low EMI and reduced voltage overshoot during turn-off in hard-switched converters. |
| High-temperature operation | Rated for 175 °C junction temperature enables reliable performance in sealed enclosures or high-ambient industrial environments. |
| Low thermal resistance | Rth(j-c) = 4 °C/W allows efficient heat transfer to external heatsink without thermal derating below 8 A at Tc = 120 °C. |
| Reinforced insulation | 2500 VRMS isolation withstand meets basic/reinforced insulation requirements for medical and industrial safety standards. |
| ECOPACK® compliance | Lead-free second-level interconnect and RoHS-compliant packaging support environmentally regulated production programs. |
Applications
| Server PSU Rectification | Industrial Motor Drive Power Stage |
|---|---|
Use Scenario: High-efficiency 80 PLUS Titanium server power supplies requiring low-loss output rectification at 100–300 kHz. IC Role / Device Role / Timing Role: Ultrafast high-voltage rectifier in synchronous or quasi-resonant LLC secondary-side full-wave configuration. Use Value: 35 ns trr and 1.1 V VF minimize switching and conduction losses, improving efficiency by ≥0.3% at full load versus standard fast recovery diodes. | Use Scenario: DC bus pre-charge and auxiliary supply rectification in 3-phase inverters for HVAC and pump drives. IC Role / Device Role / Timing Role: Isolated bridge rectifier feeding control logic and gate driver rails in grounded-chassis motor drive cabinets. Use Value: 2500 VRMS insulation eliminates need for additional creepage/clearance barriers, reducing PCB area and BOM count. |
| Telecom Rectifier Modules | Renewable Energy Inverter Auxiliary Supply |
Use Scenario: -48 V telecom rectifier modules operating continuously at 60–70 °C ambient with high reliability demands. IC Role / Device Role / Timing Role: Input-stage rectifier converting AC mains to intermediate DC bus before active PFC stage. Use Value: 20 µA IR at 150 °C prevents thermal runaway under sustained overload, extending field lifetime beyond 10 years. | Use Scenario: Auxiliary 12 V/24 V supply in solar string inverters exposed to outdoor temperature cycling (-40 to +85 °C). IC Role / Device Role / Timing Role: High-reliability rectifier in transformer-isolated flyback converter powering MCU, sensors, and communication ICs. Use Value: 175 °C Tj rating ensures stable operation during summer peak ambient, avoiding thermal shutdown or parameter drift. |
Availability
STTH806G is available at Aetrix Electronics and suitable for server power supplies, industrial motor drives, telecom rectifier modules, and renewable energy inverter auxiliary supplies requiring stable component supply and long-term industrial lifecycle support.
Supply support for STTH806G 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The STTH806G belongs to ST's Turbo 2 ultrafast diode product line, engineered specifically for high-efficiency, high-reliability AC/DC and DC/DC conversion in industrial and telecom infrastructure applications.
FAQ
What is the maximum allowable case temperature for continuous operation?
The STTH806G supports continuous operation at Tc = 120 °C when delivering its rated IF(AV) = 8 A. This is specified in Table 1 of the datasheet and validated under δ = 0.5 duty cycle conditions. Exceeding this temperature requires derating per the thermal curves in Figure 3.
Does the insulated TO-220AC package require a thermal pad or insulator between tab and heatsink?
No-the TO-220AC Ins package features an electrically isolated metal tab with integrated insulation rated for 2500 VRMS. Direct metal-to-metal mounting to the heatsink is permitted and recommended; no additional insulator or thermal pad is required for electrical isolation.
How does STTH806G compare to standard FR107 or UF4007 diodes in SMPS designs?
Compared to FR107 (trr ≈ 500 ns) or UF4007 (trr ≈ 75 ns), the STTH806G offers 35 ns trr and soft recovery, reducing switching losses by >60% and eliminating snubber circuits in 100–300 kHz designs. Its 600 V rating and 175 °C Tj also exceed both legacy parts.
Can STTH806G be used in parallel configurations for higher current handling?
Parallel operation is not recommended due to mismatch in VF temperature coefficients and dynamic recovery behavior. The datasheet specifies single-device ratings only; for >8 A applications, use higher-current alternatives like STTH1206D or implement interleaved topology instead.
STTH806G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 600 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1.85 V @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 55 ns
- Current - Reverse Leakage @ Vr:
- 8 µA @ 600 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
- Operating Temperature - Junction:
- 175°C (Max)
STTH806G FAQ
1.How can I place an order for STTH806G through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH806G 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 STTH806G reliable?
The price and inventory of STTH806G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH806G is usually 5 days.
3.What payment methods are accepted for STTH806G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH806G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH806G?
STTH806G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH806G 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 STTH806G?
For technical support, including STTH806G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH806G requirements.
6.How does Aetrix verify that STTH806G is sourced from the original manufacturer or authorized distributors?
All STTH806G 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 STTH806G meets industry standards.
7.What is the process for return or replacement of STTH806G?
All STTH806G units undergo pre-shipment inspection (PSI). If there is an issue with STTH806G, 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 STTH806G part is unused and in its original packaging.
Return procedure for STTH806G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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