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STMicroelectronics STTH806DIRG
- Part No.:
- STTH806DIRG
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-2 Insulated, TO-220AC
- Datasheet:
-
STTH806DIRG.pdf
- Description:
- DIODE GP 600V 8A TO220AC INS
- Quantity:
- Payment:
- Shipping:
Inventory:1,454
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Product details
Overview
STTH806DIRG from STMicroelectronics is a 600 V, 8 A ultrafast high-voltage rectifier diode in an insulated TO-220AC package, featuring 35 ns reverse recovery time, 1.1 V typical forward voltage at 150 °C, and 2500 VRMS insulation rating. It is engineered for high-efficiency switching power supplies and industrial AC/DC converters where low conduction and switching losses are critical.
For engineers reviewing the STTH806DIRG datasheet, STTH806DIRG pinout, STTH806DIRG application, or STTH806DIRG equivalent, key selection criteria include its 600 V repetitive peak reverse voltage, 35 ns trr at 25 °C, 4.0 °C/W junction-to-case thermal resistance, insulated package safety compliance, and suitability for high-frequency flyback and PFC stages.
Technical Context
The STTH806DIRG employs ST's Turbo 2 silicon technology to achieve ultrafast soft-recovery behavior with controlled reverse recovery current (IRM ≤ 6.5 A) and low stored charge (Qrr typ. < 35 nC). Its design targets minimal voltage overshoot and EMI generation during turn-off in hard-switched topologies.
Operating up to 175 °C junction temperature and rated for 90 A non-repetitive surge current, it supports robust thermal management via direct heatsink mounting through its insulated tab - eliminating need for additional insulating washers while maintaining 2500 VRMS isolation between case and cathode/anode terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - Withstands repetitive reverse voltages up to 600 V, enabling use in 400 V AC-input PFC and offline SMPS designs. |
| IF(AV) | 8 A at Tc = 120 °C - Sustains average forward current of 8 A with proper heatsinking, matching mid-power adapter and industrial PSU requirements. |
| trr (max) | 35 ns at IF = 0.5 A, VR = 30 V - Enables operation at switching frequencies >100 kHz with low turn-off loss and reduced snubber stress. |
| VF (typ) | 1.10 V at IF = 8 A, Tj = 150 °C - Delivers low conduction loss under full-load thermal conditions, improving system efficiency. |
| Rth(j-c) | 4.0 °C/W - Thermal resistance from junction to insulated case enables predictable thermal design without dielectric interface compromises. |
| Isolation | 2500 VRMS - Certified reinforced insulation allows safe mounting on grounded heatsinks in Class I equipment without extra barriers. |
| CJ (typ) | 7 pF at VR = 30 V - Low junction capacitance minimizes capacitive coupling noise and improves high-frequency rectification fidelity. |
Pinout & Package
STTH806DIRG uses an insulated TO-220AC package (package code: TO-220AC Ins), with metal tab electrically isolated from both anode and cathode terminals. Mounting torque: 0.80 Nm (max 1.0 Nm). Epoxy meets UL94 V0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input terminal for forward conduction path | Connected to AC or switching node side; must withstand full reverse voltage when off. |
| Cathode (Lead 2) | Output terminal for forward conduction path | Drives DC bus or output capacitor; carries full load current and defines reference potential. |
| Insulated Tab | Thermal interface only - no electrical connection | Enables direct mounting to grounded heatsink while maintaining 2500 VRMS isolation between circuit and chassis. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast soft recovery | trr ≤ 35 ns with softness factor ≥ 1.2 - Reduces voltage ringing and EMI in hard-switched converters without snubber tuning. |
| Low thermal resistance (insulated) | Rth(j-c) = 4.0 °C/W - Achieves comparable thermal performance to non-insulated TO-220AC despite isolation barrier. |
| High surge capability | IFS M = 90 A (10 ms sine) - Survives inrush and transient overloads common in industrial motor drives and UPS systems. |
| High-temperature operation | Tj(max) = 175 °C - Supports compact, sealed, or high-ambient designs without derating penalties below 125 °C ambient. |
| ECOPACK® compliant | Lead-free second-level interconnect - Meets RoHS and JEDEC JESD97 marking standards for environmental compliance and traceability. |
Applications
| Industrial AC/DC Power Supplies | Server & Telecom Rectification |
|---|---|
Use Scenario: High-density 1U server PSUs converting 230 V AC to +12 V/48 V DC using active clamp flyback or LLC resonant topologies. IC Role / Device Role / Timing Role: Output rectifier handling 8 A continuous current at >100 kHz switching frequency with minimal voltage overshoot. Use Value: 35 ns trr and soft recovery reduce secondary-side RCD snubber losses by ~30% versus standard fast recovery diodes. | Use Scenario: Telecom rectifier modules feeding -48 V DC distribution buses in central offices with strict EMI limits. IC Role / Device Role / Timing Role: Primary-side boost diode in PFC stage operating at 65–100 kHz with 400 V DC link. Use Value: 600 V VRRM and 1.1 V VF at 150 °C enable >95% PFC efficiency at full load without forced air cooling. |
| Motor Drive Inverter Front-End | Renewable Energy Inverters |
Use Scenario: Input rectification stage of 3-phase VFDs converting 400 V AC to 540 V DC bus, exposed to line transients and regenerative energy. IC Role / Device Role / Timing Role: Uncontrolled six-pulse bridge diode conducting 8 A average current with 90 A surge tolerance. Use Value: 2500 VRMS insulation eliminates need for isolating thermal pads, simplifying mechanical assembly and reducing thermal interface resistance by 15%. | Use Scenario: Grid-tied solar microinverters requiring high reliability under outdoor thermal cycling (-40 to +85 °C ambient). IC Role / Device Role / Timing Role: Boost stage freewheeling diode in DC/DC converter interfacing PV panel to H-bridge inverter. Use Value: 175 °C max junction temperature and low IR (≤200 µA at 150 °C) ensure stable operation across extended thermal cycles without leakage-induced drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06DJF | Same VRRM (600 V), lower IF(AV) (6 A), DPAK package, non-insulated tab | Requires external insulation for grounded heatsink mounting; limited to lower-current designs | Select when board space is constrained and thermal budget allows smaller package with added isolation hardware. |
| IXYS MUR860E | 600 V, 8 A, 35 ns trr, TO-220AC non-insulated, Rth(j-c) = 2.5 °C/W | No built-in isolation - mandates mica washer or silicone pad for chassis-grounded heatsinks | Choose for cost-sensitive industrial PSUs where isolation is managed externally and lower thermal resistance is prioritized. |
Compared with STTH8R06DJF and MUR860E, STTH806DIRG uniquely integrates 2500 VRMS insulation into the TO-220AC form factor - eliminating discrete isolation components while retaining 4.0 °C/W thermal resistance and full 8 A/600 V capability, making it optimal for safety-critical, space-constrained, and thermally demanding industrial rectification.
Availability
STTH806DIRG is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, telecom rectifier modules, and motor drive front-end rectification requiring stable component supply, long-lifecycle support, and certified insulation integrity.
Supply support for STTH806DIRG 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 automotive, industrial, and consumer markets.
The STTH series belongs to ST's high-voltage power diode product line, developed specifically for ultrafast, low-loss rectification in high-frequency switching power conversion systems - emphasizing reliability, thermal robustness, and safety-certified packaging.
FAQ
What is the maximum recommended mounting torque for STTH806DIRG?
The datasheet specifies a recommended torque value of 0.80 Nm with a maximum allowable torque of 1.0 Nm. Exceeding 1.0 Nm risks damaging the leadframe or compromising the internal insulation integrity of the TO-220AC Ins package. Consistent torque application ensures optimal thermal contact without mechanical stress-induced parameter shift.
Does STTH806DIRG require a thermal pad or insulator when mounted to a grounded heatsink?
No - the insulated TO-220AC package provides 2500 VRMS isolation between the metal tab and both anode and cathode terminals. This eliminates the need for mica washers, silicone pads, or other external insulators, simplifying assembly and improving thermal transfer efficiency compared to standard TO-220AC diodes.
How does STTH806DIRG's soft recovery behavior affect EMI in switch-mode designs?
With a typical softness factor ≥1.2 and controlled IRM ≤6.5 A, STTH806DIRG suppresses high-frequency voltage spikes during reverse recovery, reducing broadband conducted EMI by up to 10 dB in the 30–100 MHz range. This lowers filter component count and eases EMC certification in Class B industrial equipment.
Can STTH806DIRG replace STTH806D in existing designs without layout changes?
Yes - STTH806DIRG shares identical TO-220AC footprint and pinout with STTH806D, but features an insulated tab instead of a conductive one. No PCB layout change is needed; however, the insulated version allows direct mounting to grounded heatsinks without additional isolation hardware, improving thermal and safety margins.
STTH806DIRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-2 Insulated, TO-220AC
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- TO-220AC ins
- Operating Temperature - Junction:
- 175°C (Max)
STTH806DIRG FAQ
1.How can I place an order for STTH806DIRG through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH806DIRG 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 STTH806DIRG reliable?
The price and inventory of STTH806DIRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH806DIRG is usually 5 days.
3.What payment methods are accepted for STTH806DIRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH806DIRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH806DIRG?
STTH806DIRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH806DIRG 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 STTH806DIRG?
For technical support, including STTH806DIRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH806DIRG requirements.
6.How does Aetrix verify that STTH806DIRG is sourced from the original manufacturer or authorized distributors?
All STTH806DIRG 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 STTH806DIRG meets industry standards.
7.What is the process for return or replacement of STTH806DIRG?
All STTH806DIRG units undergo pre-shipment inspection (PSI). If there is an issue with STTH806DIRG, 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 STTH806DIRG part is unused and in its original packaging.
Return procedure for STTH806DIRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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