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Vishay General Semiconductor - Diodes Division FESB8FTHE3_A/P
- Part No.:
- FESB8FTHE3_A/P
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
FESB8FTHE3_A/P.pdf
- Description:
- DIODE GEN PURP 300V 8A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,322
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Product details
Overview
FESB8FTHE3_A/P from Vishay General Semiconductor is an ultrafast plastic rectifier diode in TO-263AB (D²PAK) package, rated for 300 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 FESB8FTHE3_A/P datasheet, FESB8FTHE3_A/P pinout, FESB8FTHE3_A/P application, or FESB8FTHE3_A/P equivalent, key selection criteria include its 35 ns trr, 0.95 V forward voltage at 8 A, 125 A non-repetitive surge rating, RoHS-compliant matte tin-plated terminals, and MSL Level 1 qualification for lead-free reflow.
Technical Context
This device belongs to the FES(F,B)8xT family of ultrafast rectifiers optimized for high-frequency switching applications. Its glass-passivated junction ensures stable leakage performance up to 100 °C, while the TO-263AB thermal resistance (RθJC = 2.2 °C/W) supports efficient heatsinking in compact power converters.
The FESB8FTHE3_A/P is specifically configured for 300 V blocking (FES8FT variant), with VF measured at 0.95 V under 8.0 A DC forward current and trr tested at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A - confirming suitability for synchronous rectification support and low-loss flyback/freewheeling roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - supports input/output rectification in 24–48 V DC-DC converters and 300 V AC-input SMPS front ends |
| IF(AV) | 8.0 A at TC = 100 °C - enables continuous conduction mode operation in 100–200 W power stages |
| trr | 35 ns - minimizes switching losses and EMI in 100–500 kHz hard-switched topologies |
| VF | 0.95 V @ 8.0 A - reduces conduction loss to ≤7.6 W, improving efficiency over standard fast rectifiers |
| IFSM | 125 A @ 8.3 ms - withstands inrush and transient surges without degradation in industrial power supplies |
| RθJC | 2.2 °C/W - allows direct PCB copper pour heatsinking, eliminating need for mechanical clips or thermal pads |
| Junction Temp | −55 °C to +150 °C - supports operation in automotive under-hood and industrial ambient environments |
Pinout & Package
Package: TO-263AB (D²PAK), surface-mount, isolated heatsink tab (pin 2), matte tin-plated leads compliant with J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Forward current entry | Connected to switching node (e.g., MOSFET drain) in freewheeling configuration |
| Pin 2 (Cathode) | Forward current exit / heatsink connection | Electrically tied to internal die cathode and exposed metal tab; must be connected to system ground or output rail |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of reverse leakage (<10 µA @ 25 °C, <500 µA @ 100 °C) across temperature and humidity stress |
| Ultrafast 35 ns recovery | Reduces turn-off energy loss by >40% vs. standard fast rectifiers (e.g., 100 ns types) in 200 kHz boost PFC stages |
| MSL Level 1 rating | Supports single-reflow lead-free assembly at 245 °C peak without popcorn or delamination risk |
| RoHS & WEEE compliant | Meets EU Directive 2011/65/EU with no exemptions required; suitable for consumer and industrial end equipment |
| E3 suffix (JESD201 Class 1A) | Validated whisker resistance for consumer-grade reliability in vibration-prone or thermally cycled applications |
Applications
| Server Power Supply Rectification | Industrial DC-DC Converter Output |
|---|---|
Use Scenario: Secondary-side rectification in 48 V input, 12 V/20 A isolated DC-DC modules for data center servers. IC Role / Device Role / Timing Role: Ultrafast freewheeling diode synchronized with primary-side MOSFET switching at 300 kHz. Use Value: 35 ns trr and 0.95 V VF reduce total rectifier loss to <8 W, enabling >94% full-load efficiency. |
Use Scenario: Output rectification in 24 V input, 5 V/15 A industrial buck-derived converter with wide ambient range (−40 to +85 °C). IC Role / Device Role / Timing Role: High-current, low-loss output diode handling continuous 8 A load with 125 A surge tolerance. Use Value: RθJC = 2.2 °C/W enables direct PCB copper heatsinking, eliminating discrete heatsinks and reducing BOM count. |
| Telecom AC-DC Front End | Motor Drive Freewheeling |
Use Scenario: Input bridge rectification in universal AC-input (90–264 VAC), 150 W telecom power supply. IC Role / Device Role / Timing Role: Fast recovery diode in full-wave bridge configuration operating at 50/60 Hz line frequency with high-frequency noise suppression. Use Value: 300 V VRRM provides 2× safety margin over 264 VAC RMS; low CJ (85 pF) limits capacitive coupling of EMI into control circuitry. |
Use Scenario: Freewheeling path for brushed DC motor drive H-bridge with 24 V bus and 8 A stall current. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback during PWM turn-off transitions. Use Value: 125 A IFSM safely handles repeated 10 ms stall surges; 150 °C TJ(max) supports operation in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay FESB8FT-E3/45 | Same die, identical electrical specs, but lacks "HE3" high-reliability suffix and AEC-Q101 qualification; E3 only (JESD201 Class 1A) | Suitable for commercial-grade systems where automotive qualification is not required | Select FESB8FTHE3_A/P when AEC-Q101 compliance and enhanced whisker resistance (Class 2) are mandatory |
| ON Semiconductor MUR830G | TO-220AC package, 300 V VRRM, 8 A IF(AV), 35 ns trr, but RθJC = 5.0 °C/W - higher thermal resistance than FESB8FTHE3_A/P's 2.2 °C/W | Requires mechanical heatsink mounting; not suitable for space-constrained SMT-only designs | Choose FESB8FTHE3_A/P for surface-mount, thermally optimized layouts; select MUR830G only if TO-220 footprint and legacy through-hole compatibility are required |
Compared with FESB8FT-E3/45, the FESB8FTHE3_A/P adds AEC-Q101 qualification and JESD201 Class 2 whisker resistance; versus MUR830G, it delivers 2.3× better thermal performance in a smaller SMT footprint - critical for high-power density 12 V/24 V industrial converters.
Availability
FESB8FTHE3_A/P is available at Aetrix Electronics and suitable for server power supply rectification, industrial DC-DC converter output stages, and telecom AC-DC front ends requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for FESB8FTHE3_A/P 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, thermal performance, and application-specific optimization.
The FES(F,B)8xT series was engineered for high-frequency power conversion - delivering ultrafast recovery, low forward drop, and robust surge capability in TO-220AC, ITO-220AC, and TO-263AB packages for SMPS, inverters, and motor drives.
FAQ
What is the maximum junction temperature rating for FESB8FTHE3_A/P?
The FESB8FTHE3_A/P has a maximum junction temperature (TJ(max)) of +150 °C, verified per Vishay Document Number 88600. This rating enables reliable operation in high-ambient environments such as enclosed industrial power supplies and automotive under-dash modules. Derating curves confirm 8.0 A IF(AV) is maintained up to TC = 100 °C, with thermal resistance RθJC = 2.2 °C/W ensuring safe thermal design margins when using appropriate PCB copper area.
Is FESB8FTHE3_A/P qualified for automotive applications?
Yes, the FESB8FTHE3_A/P carries the HE3 suffix, indicating it meets AEC-Q101 qualification for high-reliability automotive use and passes JESD201 Class 2 whisker testing. Unlike the standard E3 version, the HE3 grade is explicitly validated for under-hood and powertrain-related applications where extended temperature cycling and long-term metallurgical stability are required. Documentation is provided in Vishay's official AEC-Q101 test reports.
What does the "HE3" suffix mean in FESB8FTHE3_A/P?
The "HE3" suffix in FESB8FTHE3_A/P denotes high-reliability grade: "H" indicates AEC-Q101 qualification, "E3" confirms JESD201 Class 2 whisker resistance (superior to standard E3's Class 1A). This dual qualification ensures robustness against tin whisker growth and thermal-mechanical stress in mission-critical applications. The part remains RoHS-compliant and shares identical electrical specs with the E3 variant, differing only in process controls and screening.
Can FESB8FTHE3_A/P replace FES8FTHE3 in a TO-220AC layout?
No - FESB8FTHE3_A/P uses TO-263AB (D²PAK) packaging, while FES8FTHE3 uses TO-220AC. They share identical electrical characteristics (300 V VRRM, 35 ns trr, 0.95 V VF) but differ mechanically: TO-263AB has surface-mount pins and an isolated heatsink tab, whereas TO-220AC requires through-hole mounting and external heatsink attachment. PCB redesign is required; they are functionally equivalent but not pin-compatible.
What is the reverse recovery time test condition for FESB8FTHE3_A/P?
The reverse recovery time (trr) of 35 ns for FESB8FTHE3_A/P is measured under standardized conditions: IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A, per Vishay Document Number 88600. This reflects real-world switching behavior in hard-commutated circuits like flyback and forward converters. The value is guaranteed across temperature and is not extrapolated - it is directly measured on production lots using industry-standard double-pulse test setups.
FESB8FTHE3_A/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 300 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 300 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
FESB8FTHE3_A/P FAQ
1.How can I place an order for FESB8FTHE3_A/P through Aetrix?
Please submit a Request for Quotation (RFQ) for FESB8FTHE3_A/P 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 FESB8FTHE3_A/P reliable?
The price and inventory of FESB8FTHE3_A/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FESB8FTHE3_A/P is usually 5 days.
3.What payment methods are accepted for FESB8FTHE3_A/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FESB8FTHE3_A/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FESB8FTHE3_A/P?
FESB8FTHE3_A/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FESB8FTHE3_A/P 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 FESB8FTHE3_A/P?
For technical support, including FESB8FTHE3_A/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FESB8FTHE3_A/P requirements.
6.How does Aetrix verify that FESB8FTHE3_A/P is sourced from the original manufacturer or authorized distributors?
All FESB8FTHE3_A/P 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 FESB8FTHE3_A/P meets industry standards.
7.What is the process for return or replacement of FESB8FTHE3_A/P?
All FESB8FTHE3_A/P units undergo pre-shipment inspection (PSI). If there is an issue with FESB8FTHE3_A/P, 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 FESB8FTHE3_A/P part is unused and in its original packaging.
Return procedure for FESB8FTHE3_A/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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