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STMicroelectronics STTH802CT
- Part No.:
- STTH802CT
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
STTH802CT.pdf
- Description:
- DIODE ARRAY GP 200V 4A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:2,597
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Product details
Overview
STTH802CT from STMicroelectronics is a dual center-tap ultrafast recovery silicon rectifier diode in DPAK package, rated for 200 V repetitive peak reverse voltage, 4 A average forward current per diode (8 A total device), and 13 ns typical reverse recovery time. It delivers low conduction loss (VF = 0.81 V typ. at 125 °C, 4 A) and high surge capability (50 A, 10 ms), targeting high-frequency DC–DC converters and SMPS secondary-side rectification.
For engineers reviewing the STTH802CT datasheet, STTH802CT pinout, STTH802CT application, or STTH802CT equivalent, key selection criteria include reverse recovery time under dIF/dt stress, thermal resistance (Rth(j-c) = 4 °C/W per diode), junction temperature rating (175 °C), and DPAK thermal pad layout compatibility with PCB copper area.
Technical Context
This dual common-cathode ultrafast diode integrates two independent 200 V/4 A diodes sharing a single cathode terminal, enabling center-tapped transformer full-wave rectification. Its 13 ns trr (typ.) and low Qrr support operation above 100 kHz with minimal switching loss.
The device uses planar epitaxial construction with soft recovery characteristics to limit EMI generation during turn-off. Thermal design relies on case-to-PCB conduction via the exposed thermal pad (DPAK), with Rth(j-c) = 4 °C/W per diode and total Rth(j-c) = 2.5 °C/W for the dual die in parallel configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - supports input/output isolation up to 200 V DC or peak AC in offline or intermediate bus converters |
| IF(AV) per diode | 4 A at Tc = 155 °C - defines continuous DC output current capability per leg in center-tap topology |
| trr (typ.) | 13 ns - enables efficient operation at ≥100 kHz switching frequencies with low turn-off loss |
| VF (typ.) | 0.81 V at 125 °C, 4 A - determines conduction loss density: ~3.2 W per diode at rated current |
| Tj(max) | 175 °C - allows sustained operation in compact, thermally constrained power stages without derating |
| Rth(j-c) per diode | 4 °C/W - requires ≥5 cm² 2-oz copper pour under thermal pad for safe 4 A continuous operation |
| IFSM | 50 A (10 ms sine) - withstands inrush and short-circuit transients in 48 V telecom or server PSUs |
Pinout & Package
DPAK (TO-252) package with exposed thermal pad on underside; three terminals: Anode 1, Anode 2, and common Cathode (pin 3). Mounting requires soldering the thermal pad to a dedicated PCB copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (Pin 1) | Input terminal for first diode leg | Connects to one end of center-tapped transformer secondary or split-rail input |
| Anode 2 (Pin 2) | Input terminal for second diode leg | Connects to opposite end of center-tapped winding; electrically isolated from Pin 1 |
| Cathode (Pin 3) | Common output node | Delivers full-wave rectified DC output; must be routed with low-inductance path to bulk capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery (trr ≤ 20 ns max) | Reduces switching loss and EMI in >100 kHz DC–DC topologies such as phase-shifted full-bridge |
| High Tj rating (175 °C) | Enables smaller heatsinking or higher ambient operation in sealed industrial power supplies |
| Dual common-cathode configuration | Eliminates need for external cathode tie; simplifies PCB layout for center-tap rectifiers |
| ECOPACK®2 compliance | Meets RoHS and halogen-free requirements without compromising thermal or electrical performance |
| Low VF drift over temperature | VF increases only ~0.14 V from 25 °C to 125 °C at 4 A, easing thermal loop stability |
Applications
| Server PSU Secondary Rectification | Industrial DC–DC Converter |
|---|---|
Use Scenario: 12 V/200 A output stage in 80 PLUS Titanium server power supply using center-tapped transformer. IC Role / Device Role / Timing Role: Dual ultrafast rectifier providing synchronous-like efficiency without gate drive complexity. Use Value: 13 ns trr minimizes dead-time loss and reduces snubber size versus standard fast recovery diodes. | Use Scenario: 24 V isolated output in programmable logic controller (PLC) power module operating at 200 kHz. IC Role / Device Role / Timing Role: Center-tap rectifier handling 8 A continuous load with 175 °C junction limit enabling convection-only cooling. Use Value: 4 °C/W Rth(j-c) per diode allows thermal design with <10 cm² copper, reducing board area vs TO-220 alternatives. |
| Telecom 48 V Rectifier | Freewheeling Diode in BLDC Inverter |
Use Scenario: Output rectification in 48 V/10 A telecom brick with strict efficiency and thermal constraints. IC Role / Device Role / Timing Role: High-surge (50 A IFSM) dual diode absorbing line transients and maintaining regulation during hold-up. Use Value: Low 0.81 V VF at 125 °C cuts conduction loss by ~18% vs comparable 1.0 V diodes, improving full-load efficiency. | Use Scenario: Freewheeling path for 3-phase 24 V BLDC motor driver with 10 kHz PWM switching. IC Role / Device Role / Timing Role: Ultrafast recovery prevents cross-conduction during MOSFET turn-on and limits voltage overshoot. Use Value: Soft recovery characteristic (Qrr = 15 nC typ.) suppresses ringing, reducing EMI filter component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast dual rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH802D | Same die, TO-220AC package; Rth(j-c) = 2.5 °C/W (total), no thermal pad | Better suited for forced-air cooled designs; incompatible with DPAK footprint | Select when mechanical mounting or heatsink interface favors through-hole over surface-mount |
| MBR20200CT | Schottky construction; VF ≈ 0.95 V (25 °C), but no reverse voltage rating >100 V; trr not applicable | Limited to ≤20 V output rails; unsuitable for 48 V+ SMPS due to leakage and breakdown risk | Choose only for low-voltage, high-efficiency apps where VRRM ≤ 20 V and Tj ≤ 125 °C |
Compared with STTH802D and MBR20200CT, STTH802CT uniquely balances surface-mount integration, 200 V capability, and ultrafast recovery in a thermally optimized DPAK-making it optimal for space-constrained, high-frequency 48–60 V industrial and telecom power stages.
Availability
STTH802CT is available at Aetrix Electronics and suitable for server power supplies, industrial DC–DC converters, telecom rectifiers, and BLDC freewheeling circuits requiring stable component supply across multi-year production cycles.
Supply support for STTH802CT 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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
STTH802CT belongs to ST's high-voltage ultrafast diode product line, engineered specifically for high-frequency, high-efficiency secondary-side rectification in switched-mode power supplies and isolated DC–DC converters.
FAQ
What is the maximum recommended PCB copper area for thermal management of STTH802CT?
ST specifies minimum thermal pad copper area of 5 cm² (2-oz copper) for continuous 4 A per diode operation at Tc = 155 °C. For higher reliability or ambient temperatures >70 °C, 10 cm² is recommended. The DPAK thermal pad must be fully soldered with ≥60% coverage and connected to internal ground or power planes via ≥6 thermal vias (0.3 mm diameter, filled).
Does STTH802CT support synchronous rectification replacement?
No-STTH802CT is a passive ultrafast diode and cannot replace active synchronous rectifiers (e.g., MOSFETs with gate drivers). While its 13 ns trr enables high-frequency operation, it lacks controllability, zero-VF capability, or reverse conduction. It serves as a robust, low-complexity alternative where gate drive design or cost prohibits synchronous implementation.
How does the dual-center-tap configuration affect PCB layout versus discrete diodes?
The integrated dual-anode/common-cathode structure eliminates interconnect inductance between separate diodes and ensures matched thermal and electrical paths. Layout requires only three net connections (A1, A2, K) instead of six, reducing routing congestion near transformers. Critical placement: keep A1/A2 traces symmetrical and equal-length to minimize current imbalance under high dIF/dt.
Is STTH802CT suitable for use in automotive power modules?
STTH802CT is not AEC-Q101 qualified and lacks automotive-specific qualification testing (e.g., HTOL, temperature cycling). While its 175 °C Tj rating meets under-hood thermal demands, ST does not guarantee automotive-grade reliability or PPAP documentation. It may be used in non-safety-critical auxiliary systems (e.g., infotainment power) only after full system-level validation.
STTH802CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io) (per Diode):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 20 ns
- Current - Reverse Leakage @ Vr:
- 4 µA @ 200 V
- Operating Temperature - Junction:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
STTH802CT FAQ
1.How can I place an order for STTH802CT through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH802CT 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 STTH802CT reliable?
The price and inventory of STTH802CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH802CT is usually 5 days.
3.What payment methods are accepted for STTH802CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH802CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH802CT?
STTH802CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH802CT 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 STTH802CT?
For technical support, including STTH802CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH802CT requirements.
6.How does Aetrix verify that STTH802CT is sourced from the original manufacturer or authorized distributors?
All STTH802CT 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 STTH802CT meets industry standards.
7.What is the process for return or replacement of STTH802CT?
All STTH802CT units undergo pre-shipment inspection (PSI). If there is an issue with STTH802CT, 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 STTH802CT part is unused and in its original packaging.
Return procedure for STTH802CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STTH802CT Tags
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BAV99-7-F
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BAT54C-7-F
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BAV99,215
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BAT54SLT1G
onsemi
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BAV70LT1G
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BAT54CLT1G
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
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BAT54S,215
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BAS40-04LT1G
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MMBD1503-TP
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BAV99WT1G
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