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Vishay General Semiconductor - Diodes Division FESB8HTHE3_A/I
- Part No.:
- FESB8HTHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
FESB8HTHE3_A/I.pdf
- Description:
- DIODE GEN PURP 500V 8A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,387
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Product details
Overview
FESB8HTHE3_A/I from Vishay General Semiconductor is an ultrafast plastic rectifier diode in TO-263AB (D²PAK) package, rated for 500 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 high-frequency switching power supplies and DC-DC converters.
For engineers reviewing the FESB8HTHE3_A/I datasheet, FESB8HTHE3_A/I pinout, FESB8HTHE3_A/I application, or FESB8HTHE3_A/I equivalent, key selection criteria include its 500 V blocking capability, low 0.95 V forward voltage at 8.0 A, 125 A surge rating, 150 °C max junction temperature, and RoHS-compliant, consumer-grade (E3 suffix) construction with JESD201 Class 1A whisker resistance.
Technical Context
This device is a single-die, glass-passivated planar junction silicon rectifier optimized for high-speed switching. Its 35 ns trr and low stored charge enable minimal switching losses in hard-switched topologies operating up to several hundred kHz.
Thermally, it features a typical junction-to-case thermal resistance (RθJC) of 2.2 °C/W when mounted on a heatsink via the exposed cathode tab (Pin 2), supporting continuous 8.0 A conduction at TC = 100 °C without derating beyond standard curves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 500 V - Sustains 500 V repetitive reverse voltage; suitable for 375 V DC bus applications with 25 % margin. |
| IF(AV) | 8.0 A at TC = 100 °C - Continuous forward current rating under heatsink-cooled conditions. |
| trr | 35 ns - Ultrafast recovery enables high-frequency operation with low turn-off loss in SMPS. |
| VF | 0.95 V at IF = 8.0 A - Low conduction loss improves system efficiency and reduces thermal load. |
| IFSM | 125 A - Withstands 8.3 ms half-sine surge; supports inrush and fault-current handling in power stages. |
| TJ max. | 150 °C - Enables reliable operation in industrial ambient environments with proper thermal design. |
| RθJC | 2.2 °C/W - Confirmed for TO-263AB package; defines minimum heatsink requirement for thermal management. |
Pinout & Package
Package: TO-263AB (D²PAK), surface-mount, with isolated mounting tab (cathode). Matte tin-plated terminals, UL 94V-0 epoxy, MSL Level 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Input terminal for forward current flow; connects to switching node or transformer secondary. |
| Pin 2 / Tab | Cathode | Output terminal and thermally conductive heatsink interface; electrically isolated from PCB ground unless explicitly connected. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives. |
| Ultrafast 35 ns recovery | Reduces switching loss and EMI generation in 100–500 kHz SMPS designs. |
| Low 0.95 V forward drop at 8 A | Lowers conduction loss by ~15 % compared to standard fast rectifiers with VF ≥ 1.1 V. |
| JESD201 Class 1A whisker resistance | Validated for consumer-grade applications where tin whisker growth must be mitigated. |
| RoHS-compliant, UL 94V-0 epoxy | Meets environmental compliance and flammability safety requirements for end equipment. |
Applications
| AC-DC Power Adapters | DC-DC Buck Converters |
|---|---|
Use Scenario: Secondary-side rectification in 65–100 W offline flyback adapters powering laptops and monitors. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer AC to regulated DC; operates synchronously with MOSFET switching edge. Use Value: 35 ns trr minimizes reverse recovery ringing and improves light-load efficiency over standard FRDs. |
Use Scenario: Freewheeling path in 12 V input, 3.3/5 V output buck converters for FPGA or microprocessor core rails. IC Role / Device Role / Timing Role: Unidirectional current path during low-side switch off-time; handles peak inductor current up to 8 A. Use Value: 0.95 V VF reduces conduction loss by >0.5 W vs. 1.2 V alternatives at full load, easing thermal design. |
| Industrial Motor Drives | LED Driver Power Stages |
Use Scenario: Snubber and clamp rectification in 24–48 V H-bridge gate driver auxiliary supplies. IC Role / Device Role / Timing Role: Fast recovery clamp diode absorbing inductive kickback energy during MOSFET commutation. Use Value: 125 A IFSM withstands repeated transient surges without degradation in motor control feedback loops. |
Use Scenario: Constant-current output rectification in isolated LED drivers for street lighting (50–150 W). IC Role / Device Role / Timing Role: High-reliability output rectifier operating continuously at elevated ambient temperatures (>70 °C). Use Value: 150 °C TJ max and 2.2 °C/W RθJC support stable operation in sealed, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06D | Same VRRM (600 V), higher VF (1.7 V @ 8 A), slower trr (60 ns), TO-220AC package. | Requires heatsink mounting and layout revision; better suited for lower-frequency (<100 kHz), higher-voltage margin designs. | Select when 600 V rating is mandatory and thermal budget allows higher VF penalty. |
| ON Semi MUR860CT | Dual common-cathode configuration, 600 V, 8 A per diode, 60 ns trr, TO-220AB package. | Not single-diode; requires dual-output or center-tapped transformer topology; not pin-compatible. | Choose only for dual-channel rectification needs; not a direct functional substitute for FESB8HTHE3_A/I's single-anode/single-cathode topology. |
Compared with STTH8R06D and MUR860CT, FESB8HTHE3_A/I delivers superior high-frequency efficiency due to its 35 ns trr and 0.95 V VF, while its TO-263AB footprint enables compact, surface-mount power stage layouts without through-hole assembly.
Availability
FESB8HTHE3_A/I is available at Aetrix Electronics and suitable for high-frequency switching power supplies, DC-DC converters, and industrial motor drive auxiliary supplies requiring stable component supply and RoHS-compliant manufacturing.
Supply support for FESB8HTHE3_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 family targets cost-sensitive, high-volume power conversion applications demanding ultrafast recovery, low VF, and robust surge capability - especially in consumer and industrial SMPS designs.
FAQ
What is the maximum junction temperature rating for the FESB8HTHE3_A/I?
The FESB8HTHE3_A/I has a maximum junction temperature (TJ) of 150 °C, verified per Vishay Document Number 88600. This rating allows operation in demanding thermal environments when properly heatsinked via the cathode tab. Derating curves in the FESB8HTHE3_A/I datasheet define safe current limits versus case temperature, ensuring long-term reliability at elevated ambient conditions.
Is the FESB8HTHE3_A/I RoHS-compliant and lead-free?
Yes, the FESB8HTHE3_A/I is RoHS-compliant per Directive 2011/65/EU and WEEE 2002/96/EC, with matte tin-plated leads and lead-free solder compatibility confirmed in the official Vishay documentation. The "E3" suffix denotes consumer-grade qualification including JESD201 Class 1A whisker testing, and all materials meet Vishay's Material Category Policy for hazardous substance restrictions.
What is the reverse recovery time (trr) of the FESB8HTHE3_A/I, and under what conditions is it measured?
The FESB8HTHE3_A/I has a maximum reverse recovery time (trr) of 35 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per Vishay Document Number 88600. This ultrafast value is critical for minimizing switching losses in high-frequency power converters and distinguishes FESB8HTHE3_A/I from standard fast recovery diodes with trr > 50 ns.
Can the FESB8HTHE3_A/I be used as a direct replacement for the FES8HT-E3/45 in TO-220AC package?
No - the FESB8HTHE3_A/I uses TO-263AB (D²PAK) packaging with surface-mount cathode tab, whereas FES8HT-E3/45 is in through-hole TO-220AC. Though electrically identical in VRRM, IF(AV), and trr, the FESB8HTHE3_A/I requires PCB land pattern and thermal design changes. It is a functional alternative, not a pin-compatible drop-in replacement.
What is the thermal resistance from junction to case (RθJC) for the FESB8HTHE3_A/I?
The FESB8HTHE3_A/I has a typical junction-to-case thermal resistance (RθJC) of 2.2 °C/W, specified for the TO-263AB package in Vishay Document Number 88600. This value assumes proper mounting of the cathode tab to a heatsink or copper pour; actual thermal performance depends on interface material, clamping force, and PCB copper area.
FESB8HTHE3_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):
- 500 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 500 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
FESB8HTHE3_A/I FAQ
1.How can I place an order for FESB8HTHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for FESB8HTHE3_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 FESB8HTHE3_A/I reliable?
The price and inventory of FESB8HTHE3_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 FESB8HTHE3_A/I is usually 5 days.
3.What payment methods are accepted for FESB8HTHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FESB8HTHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FESB8HTHE3_A/I?
FESB8HTHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FESB8HTHE3_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 FESB8HTHE3_A/I?
For technical support, including FESB8HTHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FESB8HTHE3_A/I requirements.
6.How does Aetrix verify that FESB8HTHE3_A/I is sourced from the original manufacturer or authorized distributors?
All FESB8HTHE3_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 FESB8HTHE3_A/I meets industry standards.
7.What is the process for return or replacement of FESB8HTHE3_A/I?
All FESB8HTHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with FESB8HTHE3_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 FESB8HTHE3_A/I part is unused and in its original packaging.
Return procedure for FESB8HTHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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