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Vishay General Semiconductor - Diodes Division FES8CT-E3/45
- Part No.:
- FES8CT-E3/45
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
FES8CT-E3/45.pdf
- Description:
- DIODE GEN PURP 150V 8A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:972
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Product details
Overview
FES8CT-E3/45 from Vishay General Semiconductor is an ultrafast plastic rectifier diode in TO-220AC package, rated for 150 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 output rectifier in switching-mode power supplies and DC-DC converters operating at frequencies up to several hundred kHz.
For engineers reviewing the FES8CT-E3/45 datasheet, FES8CT-E3/45 pinout, FES8CT-E3/45 application, or FES8CT-E3/45 equivalent, key selection criteria include its 150 V blocking rating, low 0.95 V forward voltage at 8 A, 125 A surge capability, thermal resistance of 2.2 °C/W (junction-to-case), and RoHS-compliant matte tin-plated leads solderable per J-STD-002.
Technical Context
The FES8CT-E3/45 employs a glass-passivated silicon junction optimized for ultrafast switching, achieving trr = 35 ns under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A test conditions. Its low leakage (10 µA at 25 °C, 500 µA at 100 °C) and high surge rating (125 A, 8.3 ms half-sine) support reliable operation in transient-prone power conversion stages.
Designed for mounting on heatsinks with ≤10 in-lbs torque, the TO-220AC package provides direct thermal path from junction to case (RθJC = 2.2 °C/W) and operates across -55 °C to +150 °C junction temperature range. The device meets MSL Level 1 and JESD201 Class 1A whisker testing for consumer-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - Maximum repetitive reverse voltage; defines safe DC blocking capability in rectifier position. |
| 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 (>100 kHz) with minimal switching loss. |
| VF | 0.95 V at 8.0 A - Low forward drop reduces conduction loss and improves system efficiency. |
| IFSM | 125 A - Peak non-repetitive surge current handling for startup or overload transients. |
| RθJC | 2.2 °C/W - Thermal resistance enables effective heatsinking; supports ~3.6 W dissipation at ΔT = 8 °C. |
| TJ max. | +150 °C - Maximum junction temperature allows operation in high-ambient industrial environments. |
Pinout & Package
TO-220AC package with 2-pin configuration: Pin 1 = Anode, Pin 2 = Cathode (marked with cathode band). Mounting tab (case) is electrically connected to cathode (Pin 2) and serves as primary thermal interface to heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Input terminal for forward current flow; connects to AC or switched node side of rectifier circuit. |
| Pin 2 / Tab | Cathode | Output terminal and electrically tied to metal tab; requires insulated mounting if heatsink is grounded. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and moisture resistance without hermetic sealing. |
| Ultrafast 35 ns recovery | Reduces reverse recovery charge (Qrr) and associated switching losses in SMPS designs. |
| Low 0.95 V forward voltage | Lowers conduction loss at full load, improving efficiency especially in 12–48 V output converters. |
| 125 A surge rating | Withstands inrush currents during cold start or short-circuit events without degradation. |
| RoHS-compliant & JESD201 Class 1A | Meets environmental compliance and mitigates tin whisker risk in consumer-grade applications. |
Applications
| Server Power Supply Rectification | Industrial DC-DC Converter Output Stage |
|---|---|
Use Scenario: High-density 48 V input, 12 V output server PSU with synchronous rectification backup. IC Role / Device Role / Timing Role: Primary output rectifier handling continuous 8 A load with fast transient response. Use Value: 35 ns trr minimizes cross-conduction loss when paired with MOSFET synchronous drivers. |
Use Scenario: Isolated 24 V to 5 V/3.3 V DC-DC module for PLC I/O modules. IC Role / Device Role / Timing Role: Freewheeling diode in flyback secondary-side rectification. Use Value: 150 V VRRM safely handles reflected voltage spikes up to 135 V during MOSFET turn-off. |
| Telecom Brick Power Module | LED Driver Secondary Rectification |
Use Scenario: 54 V input telecom power brick delivering 12 V/10 A with >90 % efficiency target. IC Role / Device Role / Timing Role: Output rectifier in forward converter topology operating at 250 kHz. Use Value: 0.95 V VF limits conduction loss to <1.2 W at full load, easing thermal design. |
Use Scenario: Constant-current LED driver for street lighting with 36 V nominal output. IC Role / Device Role / Timing Role: Secondary-side rectifier in quasi-resonant flyback stage. Use Value: 125 A IFSM withstands capacitor-charging surges during hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8L06W | 600 V VRRM, 8 A IF(AV), 60 ns trr, TO-220AC package, higher VF (1.7 V @ 8 A). | Better suited for higher-voltage PFC or boost stages; less efficient at 150 V-class outputs due to higher VF. | Select when system requires >300 V blocking or higher surge margin; avoid where low VF dominates efficiency. |
| ON Semi MUR860 | 600 V VRRM, 8 A IF(AV), 60 ns trr, TO-220AC, 1.75 V VF @ 8 A, higher RθJC (3.0 °C/W). | Targeted at universal-input offline SMPS; not optimized for low-VF mid-voltage rectification. | Prefer for 380 V DC bus applications; FES8CT-E3/45 offers 42 % lower conduction loss at 150 V systems. |
Compared with STTH8L06W and MUR860, the FES8CT-E3/45 delivers superior efficiency in 100–200 V output rectification due to its 0.95 V forward voltage and 35 ns recovery-enabling smaller heatsinks and higher power density where voltage stress permits.
Availability
FES8CT-E3/45 is available at Aetrix Electronics and suitable for switching-mode power supplies, DC-DC converters, and industrial motor drive auxiliary supplies requiring stable component supply and consistent parametric performance across production lots.
Supply support for FES8CT-E3/45 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 was engineered for high-frequency power conversion, targeting cost-sensitive yet performance-driven applications in computing, telecom, and industrial power where ultrafast recovery and low VF directly impact thermal and efficiency targets.
FAQ
What is the maximum junction temperature rating for the FES8CT-E3/45?
The FES8CT-E3/45 has a maximum junction temperature (TJ) of +150 °C, verified per Vishay Document Number 88600. This rating allows sustained operation in high-ambient environments such as enclosed industrial enclosures or telecom equipment chassis, provided thermal design maintains junction temperature below this limit using the specified TO-220AC heatsink interface.
Is the FES8CT-E3/45 pin-compatible with other devices in the FES(F,B)8xT series?
Yes-the FES8CT-E3/45 shares identical TO-220AC mechanical dimensions and pinout (Anode = Pin 1, Cathode = Pin 2/tab) with all FES8xT variants (e.g., FES8AT, FES8BT). Voltage ratings differ across the series, but PCB layout and mounting remain unchanged, enabling design reuse across 50–600 V blocking requirements.
Does the FES8CT-E3/45 meet automotive qualification standards?
No-the FES8CT-E3/45 carries the E3 suffix indicating consumer-grade qualification per JESD201 Class 1A whisker testing. For automotive use, Vishay specifies the HE3 suffix (e.g., FES8CT-HE3/45), which is AEC-Q101 qualified and meets JESD201 Class 2. The FES8CT-E3/45 is not approved for automotive applications.
What is the typical junction capacitance of the FES8CT-E3/45?
The FES8CT-E3/45 exhibits a typical junction capacitance (CJ) of 85 pF at 4.0 V and 1 MHz, as measured per Vishay's electrical characteristics table. This value influences high-frequency noise coupling and snubber design in fast-switching topologies, particularly in QR flyback or active clamp forward converters.
Can the FES8CT-E3/45 be used without a heatsink?
Only at very low duty cycles or derated current: with RθJC = 2.2 °C/W and no heatsink, ambient-to-junction thermal resistance exceeds 60 °C/W. At 8 A and 0.95 V VF, power dissipation is ~7.6 W-raising junction temperature by >450 °C above ambient. A heatsink is mandatory for continuous operation; minimum recommended thermal resistance is ≤8 °C/W for safe TJ < 125 °C at 25 °C ambient.
FES8CT-E3/45 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 150 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 @ 150 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
FES8CT-E3/45 FAQ
1.How can I place an order for FES8CT-E3/45 through Aetrix?
Please submit a Request for Quotation (RFQ) for FES8CT-E3/45 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 FES8CT-E3/45 reliable?
The price and inventory of FES8CT-E3/45 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FES8CT-E3/45 is usually 5 days.
3.What payment methods are accepted for FES8CT-E3/45?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FES8CT-E3/45 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FES8CT-E3/45?
FES8CT-E3/45 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FES8CT-E3/45 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 FES8CT-E3/45?
For technical support, including FES8CT-E3/45 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FES8CT-E3/45 requirements.
6.How does Aetrix verify that FES8CT-E3/45 is sourced from the original manufacturer or authorized distributors?
All FES8CT-E3/45 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 FES8CT-E3/45 meets industry standards.
7.What is the process for return or replacement of FES8CT-E3/45?
All FES8CT-E3/45 units undergo pre-shipment inspection (PSI). If there is an issue with FES8CT-E3/45, 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 FES8CT-E3/45 part is unused and in its original packaging.
Return procedure for FES8CT-E3/45:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FES8CT-E3/45 Tags
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