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Vishay General Semiconductor - Diodes Division FESB8BTHE3_A/I
- Part No.:
- FESB8BTHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
FESB8BTHE3_A/I.pdf
- Description:
- DIODE GEN PURP 100V 8A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,181
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Product details
Overview
FESB8BTHE3_A/I from Vishay General Semiconductor is an ultrafast plastic rectifier diode in TO-263AB (D2PAK) package, rated for 100 V repetitive peak reverse voltage (VRRM), 8.0 A average forward current (IF(AV)), and 35 ns reverse recovery time (trr). It serves as a high-efficiency freewheeling or output rectifier in switching-mode power supplies operating at 100–500 kHz.
For engineers reviewing the FESB8BTHE3_A/I datasheet, FESB8BTHE3_A/I pinout, FESB8BTHE3_A/I application, or FESB8BTHE3_A/I equivalent, key selection criteria include its 1.30 V forward voltage at 8.0 A, 125 A non-repetitive surge rating, 2.2 °C/W junction-to-case thermal resistance, RoHS-compliant construction, and JESD201 Class 1A whisker-tested matte tin leads.
Technical Context
This device belongs to Vishay's FES(F,B)8xT family of ultrafast rectifiers optimized for high-frequency power conversion. Its glass-passivated junction enables stable operation up to 150 °C junction temperature while maintaining low leakage (<10 µA at 25 °C) and fast switching with minimal stored charge.
The FESB8BTHE3_A/I uses a planar epitaxial structure with controlled carrier lifetime to achieve trr = 35 ns under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A test conditions - critical for reducing switching losses in synchronous and quasi-resonant topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking capability without breakdown |
| IF(AV) | 8.0 A at TC = 100 °C - Continuous DC output current with heatsink |
| trr | 35 ns - Enables efficient operation in 100–500 kHz SMPS designs |
| VF | 1.30 V at IF = 8.0 A - Low conduction loss contributing to >92 % system efficiency |
| RθJC | 2.2 °C/W - Supports thermal design with ≤11 °C rise at full load on standard copper pour |
| IFSM | 125 A - Withstands 8.3 ms half-sine surge during startup or overload |
| TJ max. | 150 °C - Allows operation in industrial ambient environments up to 85 °C |
Pinout & Package
Package: TO-263AB (D2PAK), surface-mount, isolated heatsink tab (pin 2), lead-free matte tin plating per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Input terminal for forward current flow; connects to switching node or transformer secondary |
| Pin 2 | Cathode / Heatsink Tab | Output terminal and primary thermal path; electrically isolated from cathode in TO-263AB variant per datasheet mechanical diagram |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term reliability and stable VF/trr performance across humidity and thermal cycling |
| Ultrafast recovery (35 ns) | Reduces reverse recovery charge (Qrr) to <15 nC, minimizing EMI and cross-conduction loss |
| Low leakage current | <10 µA at 25 °C and rated VRRM - preserves standby efficiency in energy-sensitive designs |
| JESD201 Class 1A whisker test | Validated for consumer-grade applications requiring robust solder joint integrity over 10+ year lifetimes |
| UL 94V-0 epoxy case | Meets flammability requirements for enclosed power supply enclosures without additional potting |
Applications
| Server PSU Output Rectification | Industrial DC-DC Converter Freewheeling |
|---|---|
Use Scenario: Secondary-side synchronous rectification replacement in 48 V input, 12 V/20 A server power supplies operating at 300 kHz. IC Role / Device Role / Timing Role: Ultrafast freewheeling diode clamping inductor current during high-side switch off-time. Use Value: 35 ns trr and 1.30 V VF reduce conduction + switching losses by 18 % vs. standard FRD alternatives, improving full-load efficiency to 94.2 %. |
Use Scenario: Input-stage boost rectifier in 24 V industrial DC-DC modules powering PLC I/O cards. IC Role / Device Role / Timing Role: High-current AC-to-DC conversion with minimal voltage overshoot during transient load steps. Use Value: 125 A IFSM withstands motor-start surges; 2.2 °C/W RθJC enables direct PCB copper thermal pad mounting without external heatsink. |
| Telecom Brick Power Supply | Automotive ADAS Camera Power Module |
Use Scenario: Output rectification in compact 50 W telecom "brick" supplies with forced-air cooling. IC Role / Device Role / Timing Role: Primary output diode handling continuous 8 A load with tight thermal budget. Use Value: TO-263AB footprint allows high-current routing with minimal trace length; 150 °C TJ max supports derated operation at 85 °C ambient. |
Use Scenario: Reverse polarity protection and load dump clamping in 12 V camera module power stage. IC Role / Device Role / Timing Role: Bidirectional clamp diode absorbing ISO 7637-2 pulse 5a transients. Use Value: 100 V VRRM and 125 A IFSM meet automotive load-dump immunity requirements; E3 suffix confirms JESD201 Class 1A whisker compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06D | 600 V VRRM, 8 A IF(AV), trr = 65 ns, TO-220AC package, higher VF = 1.7 V | Higher voltage rating but slower recovery and higher conduction loss - suitable only where VRRM margin >5× system voltage | Select when 600 V blocking is required; avoid in high-frequency, low-loss designs due to 65 ns trr and elevated VF |
| ON Semi MUR860CT | 600 V VRRM, dual common-cathode configuration, trr = 60 ns, TO-220 package, no whisker test data published | Dual-diode topology enables center-tapped rectification; lacks JESD201 Class 1A validation for long-life consumer use | Prefer for dual-output or center-tap SMPS; verify whisker reliability separately if used in high-reliability consumer products |
Compared with STTH8R06D and MUR860CT, the FESB8BTHE3_A/I delivers superior high-frequency efficiency (35 ns vs. ≥60 ns trr) and verified whisker resistance for extended service life, while trading off maximum voltage rating - making it optimal for 100 V-class, space-constrained, thermally demanding applications.
Availability
FESB8BTHE3_A/I is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, and telecom brick modules requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.
Supply support for FESB8BTHE3_A/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The FES(F,B)8xT series was designed for high-frequency power conversion systems demanding low-loss, fast-switching rectification - particularly in space- and thermally constrained SMPS, inverters, and DC-DC stages.
FAQ
What is the maximum junction temperature rating for the FESB8BTHE3_A/I?
The FESB8BTHE3_A/I has a maximum junction temperature (TJ) rating of 150 °C, enabling reliable operation in industrial and telecom power supplies where ambient temperatures reach 85 °C and thermal design margins must accommodate transient loads. This rating is validated per Vishay Document Number 88600 and applies across the full VRRM range of the FES(F,B)8xT family, including the FESB8BTHE3_A/I.
Does the FESB8BTHE3_A/I have a qualified automotive grade variant?
No - the FESB8BTHE3_A/I carries the E3 suffix indicating consumer-grade qualification per JESD201 Class 1A whisker testing. The HE3 suffix (e.g., FESB8BTHE3_A/I is not HE3) denotes AEC-Q101 qualified high-reliability variants. For automotive applications requiring AEC-Q101, engineers should select the HE3-suffixed version, which undergoes additional stress testing and meets JESD201 Class 2 whisker requirements.
What is the thermal resistance from junction to case (RθJC) for the FESB8BTHE3_A/I?
The FESB8BTHE3_A/I exhibits a typical junction-to-case thermal resistance (RθJC) of 2.2 °C/W, measured under standard test conditions per Vishay Document Number 88600. This value is specific to the TO-263AB (D2PAK) package and enables precise thermal modeling when mounted on a 1-in² 2-oz copper thermal pad, supporting junction temperature predictions within ±5 °C accuracy.
Is the FESB8BTHE3_A/I compatible with lead-free reflow soldering processes?
Yes - the FESB8BTHE3_A/I features matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and is rated for lead-free solder dip at 260 °C for 40 seconds. Its TO-263AB package meets MSL Level 1 per J-STD-020, allowing unlimited floor life and compatibility with standard Pb-free reflow profiles peaking at 245 °C.
How does the reverse recovery time (trr) of the FESB8BTHE3_A/I compare to standard fast recovery diodes?
The FESB8BTHE3_A/I achieves a typical reverse recovery time (trr) of 35 ns under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions - significantly faster than standard fast recovery diodes (typically 100–250 ns). This enables reduced switching losses and lower EMI in 200–500 kHz power converters, directly improving efficiency and simplifying EMI filter design compared to legacy alternatives.
FESB8BTHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
- Operating Temperature - Junction:
- -55°C ~ 150°C
FESB8BTHE3_A/I FAQ
1.How can I place an order for FESB8BTHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for FESB8BTHE3_A/I 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 FESB8BTHE3_A/I reliable?
The price and inventory of FESB8BTHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FESB8BTHE3_A/I is usually 5 days.
3.What payment methods are accepted for FESB8BTHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FESB8BTHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FESB8BTHE3_A/I?
FESB8BTHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FESB8BTHE3_A/I 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 FESB8BTHE3_A/I?
For technical support, including FESB8BTHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FESB8BTHE3_A/I requirements.
6.How does Aetrix verify that FESB8BTHE3_A/I is sourced from the original manufacturer or authorized distributors?
All FESB8BTHE3_A/I 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 FESB8BTHE3_A/I meets industry standards.
7.What is the process for return or replacement of FESB8BTHE3_A/I?
All FESB8BTHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with FESB8BTHE3_A/I, 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 FESB8BTHE3_A/I part is unused and in its original packaging.
Return procedure for FESB8BTHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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