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STMicroelectronics STTH8ST06DI
- Part No.:
- STTH8ST06DI
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-2 Insulated, TO-220AC
- Datasheet:
-
STTH8ST06DI.pdf
- Description:
- DIODE GP 600V 8A TO220AC INS
- Quantity:
- Payment:
- Shipping:
Inventory:710
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Product details
Overview
STTH8ST06DI from STMicroelectronics is a 600 V tandem extra-fast recovery diode in an insulated TO-220AC package, featuring two 300 V diodes in series with matched thermal and dynamic characteristics. It delivers typ. 13 ns reverse recovery time (trr), 2.5 V forward voltage (VF) at 8 A and 150 °C, and 40 A repetitive peak forward current (IFRM), optimized for continuous conduction mode (CCM) PFC boost stages in industrial power supplies.
For engineers reviewing the STTH8ST06DI datasheet, STTH8ST06DI pinout, STTH8ST06DI application, or STTH8ST06DI equivalent, key selection criteria include trr vs. dIF/dt performance, QRR minimization under high-voltage hard-switching conditions, VF/QRR trade-off versus SiC Schottky alternatives, and thermal equilibrium between internal tandem diodes in insulated packages.
Technical Context
This device implements ST's Turbo 2 600 V technology with tandem die architecture-two monolithic 300 V junctions in series-ensuring static and dynamic voltage balance across both segments. Its design guarantees equal thermal conditions and intrinsic voltage sharing without external balancing components.
It operates with ultra-low switching losses due to minimized QRR (4 nC typ. at 25 °C, 20 nC at 125 °C) and soft reverse recovery (SFACTOR = 0.9 typ.), enabling efficient operation in high-frequency hard-switched PFC converters where di/dt exceeds 200 A/µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V repetitive peak reverse voltage - supports 400 V DC bus designs with 50% safety margin |
| IF(AV) | 8 A average forward current at Tc = 80 °C - defines continuous conduction capability in boost diode position |
| trr (typ) | 13 ns at IF = 8 A, VR = 400 V, dIF/dt = −200 A/µs - enables >100 kHz PFC operation with low EMI |
| QRR (typ) | 4 nC at 25 °C, 20 nC at 125 °C - directly reduces turn-on loss in downstream switches |
| VF (typ) | 2.5 V at IF = 8 A, Tj = 150 °C - balances conduction loss against silicon carbide cost premium |
| Rth(j-c) | 2.9 °C/W - enables 35 W max dissipation at ΔT = 100 °C case-to-junction rise |
| IRM (typ) | 2 A peak reverse recovery current - constrains snubber sizing and EMI filter requirements |
Pinout & Package
STTH8ST06DI uses an insulated TO-220AC package with creepage/clearance compliant to 2500 VRMS isolation rating. The device has two terminals: Anode (A) and Cathode (K), with the metal tab electrically isolated and thermally conductive.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Input terminal for forward conduction path | Connected to PFC inductor output; must withstand full 600 V blocking during off-state |
| Cathode (K) | Output terminal for forward conduction path | Connected to bulk capacitor positive rail; carries full load current with minimal VF drop |
| Metal tab | Thermal interface / isolated heat sink mount | Electrically isolated per UL94 V0 epoxy; enables direct mounting to grounded heatsink without insulation pad |
Key Features
| Feature | Design Value |
|---|---|
| Tandem diode architecture | Two matched 300 V junctions in series ensure intrinsic voltage division and eliminate external balancing networks |
| Insulated TO-220AC package | 2500 VRMS isolation enables safe use in grounded-heatsink topologies without additional insulation |
| Ultra-low QRR | 4–20 nC over temperature range reduces MOSFET turn-on loss and improves system efficiency in CCM PFC |
| Soft recovery (SFACTOR = 0.9) | Minimizes voltage overshoot and EMI generation during reverse recovery in high-dI/dt circuits |
| Turbo 2 600 V process | Optimized carrier lifetime control achieves best-in-class VF/trr trade-off for silicon-based 600 V rectifiers |
Applications
| Industrial AC-DC Power Supplies | Server & Telecom Rectification |
|---|---|
Use Scenario: 3.5 kW CCM boost PFC stage operating at 70 kHz with 400 V DC bus. IC Role / Device Role / Timing Role: Primary boost rectifier handling full line-frequency averaged current and high-frequency switching stress. Use Value: 13 ns trr and soft recovery reduce MOSFET switching loss by ~18% vs. standard ultrafast diodes, lowering thermal load on primary switch. | Use Scenario: High-density 1U server PSU with constrained airflow and strict EMI limits. IC Role / Device Role / Timing Role: Output rectifier in active clamp forward or LLC secondary side, requiring low QRR and low IR. Use Value: 200 µA max IR at 125 °C ensures stable no-load regulation; 2.9 °C/W Rth(j-c) supports 35 W dissipation with 100 °C ΔT. |
| Uninterruptible Power Systems (UPS) | Motor Drive Input Rectification |
Use Scenario: Double-conversion online UPS with bidirectional PFC and inverter stages. IC Role / Device Role / Timing Role: Bidirectional conduction path in IGBT-based input rectifier/inverter bridge. Use Value: Tandem symmetry ensures balanced voltage stress during regeneration; 55 A non-repetitive surge rating handles short-circuit transients. | Use Scenario: 15 kW HVAC inverter front-end with 3-phase 480 V AC input. IC Role / Device Role / Timing Role: Input bridge rectifier operating in discontinuous conduction mode with high dIF/dt. Use Value: 200 A/µs dIF/dt capability and 0.9 softness factor suppress voltage spikes across DC-link capacitors and reduce snubber losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage fast recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH12S06D | 12 A IF(AV), same VRRM and TO-220AC ins. package, 15 ns trr (typ), 2.7 V VF (typ) at 12 A | Higher current rating suits >5 kW PFC; slightly higher VF increases conduction loss at 8 A | Select when system requires ≥10 A average current headroom or future-proofing for power scaling |
| IXYS MUR860E | 8 A IF(AV), 600 V VRRM, TO-220AC (non-insulated), 35 ns trr (typ), 2.1 V VF (typ) at 8 A | Lacks internal insulation; requires external isolation for grounded heatsink use; slower recovery increases switching loss | Choose only if mechanical isolation is handled externally and trr >30 ns is acceptable for <50 kHz operation |
Compared with STTH12S06D, STTH8ST06DI offers lower conduction loss at 8 A and tighter thermal matching in tandem structure; versus MUR860E, it provides superior hard-switching performance and integrated isolation-critical for compact, high-reliability PFC designs.
Availability
STTH8ST06DI is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, server & telecom rectification, and uninterruptible power systems requiring stable component supply and long-term lifecycle support.
Supply support for STTH8ST06DI 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 automotive, industrial, and consumer markets.
STTH8ST06DI belongs to ST's Turbo 2 high-voltage fast recovery diode product line, engineered specifically for high-efficiency, high-frequency CCM PFC and industrial rectification where silicon cost-performance balance is critical.
FAQ
What is the maximum junction temperature and how does it affect reliability?
The STTH8ST06DI has a maximum junction temperature of 175 °C. Operation up to this limit is permitted but reduces long-term reliability; derating to ≤150 °C extends lifetime significantly. Thermal resistance (Rth(j-c) = 2.9 °C/W) allows calculation of required heatsink thermal resistance based on actual power dissipation and ambient conditions.
Is the TO-220AC ins. package compatible with standard TO-220 mounting hardware?
Yes-the STTH8ST06DI uses a standard TO-220AC outline with insulated tab, compatible with common mounting screws and torque specifications (recommended 0.55 N·m, max 0.7 N·m). The insulated tab eliminates need for mica washers or silicone pads when mounted to grounded heatsinks.
How does the tandem diode structure improve voltage sharing compared to discrete串联 diodes?
Unlike discrete series-connected diodes, the monolithic tandem structure ensures identical doping profiles, geometry, and thermal coupling-guaranteeing static and dynamic voltage balance without external resistors or capacitors. This eliminates mismatch-induced overstress and improves system robustness under transient conditions.
Can STTH8ST06DI replace SiC Schottky diodes in PFC applications?
It serves as a cost-effective alternative where trr ≤13 ns and QRR ≤20 nC meet system requirements, but cannot match SiC's zero reverse recovery or sub-1.5 V VF. Use STTH8ST06DI when total system cost, thermal design constraints, and EMI targets favor silicon with optimized recovery behavior over SiC's performance premium.
STTH8ST06DI 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:
- 3.4 V @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 17 ns
- Current - Reverse Leakage @ Vr:
- 6 µA @ 600 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC ins
- Operating Temperature - Junction:
- -40°C ~ 175°C
STTH8ST06DI FAQ
1.How can I place an order for STTH8ST06DI through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH8ST06DI 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 STTH8ST06DI reliable?
The price and inventory of STTH8ST06DI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH8ST06DI is usually 5 days.
3.What payment methods are accepted for STTH8ST06DI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH8ST06DI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH8ST06DI?
STTH8ST06DI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH8ST06DI 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 STTH8ST06DI?
For technical support, including STTH8ST06DI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH8ST06DI requirements.
6.How does Aetrix verify that STTH8ST06DI is sourced from the original manufacturer or authorized distributors?
All STTH8ST06DI 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 STTH8ST06DI meets industry standards.
7.What is the process for return or replacement of STTH8ST06DI?
All STTH8ST06DI units undergo pre-shipment inspection (PSI). If there is an issue with STTH8ST06DI, 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 STTH8ST06DI part is unused and in its original packaging.
Return procedure for STTH8ST06DI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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