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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Vishay General Semiconductor - Diodes Division 40EPF10

Name: 40EPF10
Brand: Vishay General Semiconductor - Diodes Division
SKU: 40EPF10
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 40EPF10

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Diodes

Package:: TO-247-2

Datasheet:: 40EPF10.pdf

Description:: DIODE GP 1KV 40A TO247AC

Quantity:: RFQ Add To RFQ list

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Inventory:7,505

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Product details

Overview

40EPF10 from Vishay is a fast soft recovery high-voltage rectifier diode in TO-247AC (modified) package, rated for 1000 V reverse voltage (V_RRM), 40 A average forward current (I_F(AV)), and 95 ns reverse recovery time (t_rr) at 1 A/–100 A/µs. It delivers low forward voltage drop (1.25 V @ 20 A, T_J = 25°C) and operates from –40°C to +150°C junction temperature, optimized for EMI-sensitive input rectification and freewheeling in industrial converters.

For engineers reviewing the 40EPF10 datasheet, 40EPF10 pinout, 40EPF10 application, or 40EPF10 equivalent, key selection criteria include its soft-recovery behavior, 0.6 °C/W thermal resistance (R_thJC), 475 A non-repetitive surge rating (I_FSM), and QUIETIR-series EMI suppression capability in high-di/dt switching environments.

Technical Context

The 40EPF10 employs planar passivated silicon with glass-protected junctions to ensure stable operation under severe thermal cycling and power stress. Its fast soft recovery profile minimizes voltage overshoot and ringing during commutation, reducing conducted EMI without requiring snubbers.

Designed for high-efficiency DC-link and freewheeling paths, it supports 180° sinusoidal conduction at T_C = 105°C and withstands 10 ms sine-wave surges up to 475 A with no voltage reapplied. The device exhibits 0.94 V threshold voltage (V_F(TO)) and 6.82 mΩ forward slope resistance (r_t), enabling predictable conduction loss modeling.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - Maximum repetitive peak reverse voltage; defines safe blocking capability in 800 V DC-link applications.
I_F(AV)	40 A @ T_C = 105°C, 180° half-sine - Continuous output rectification capacity with standard heatsinking.
t_rr	95 ns @ 1 A, –100 A/µs - Soft recovery reduces EMI generation during turn-off in choppers and inverters.
V_F	1.25 V @ 20 A, T_J = 25°C - Low conduction loss enables higher efficiency vs. standard recovery diodes.
R_thJC	0.6 °C/W - Enables direct mounting to heatsink for thermal management in high-power industrial modules.
I_FSM	475 A @ 10 ms sine pulse, no voltage reapplied - Robust surge handling for motor drive startup transients.
Q_rr	1.8 µC @ 25°C - Low recovered charge limits switching losses and di/dt-induced voltage spikes.

Pinout & Package

Package: TO-247AC (Modified), 3-terminal through-hole case with isolated base (pin 2), anode (pin 1), and cathode (pin 3). Mounting torque: 6–12 kg·cm (5–10 lbf·in); thermal resistance from case to heatsink (R_thCS) is 0.2 °C/W with smooth, greased surface.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Forward current entry point; connects to AC or switched node in bridge/freewheeling configuration.
2	Base / Case	Electrically isolated metal tab; serves as mechanical mounting interface and thermal path to heatsink.
3	Cathode	Forward current exit point; ties to DC bus or load return; polarity-marked on package body.

Key Features

Feature	Design Value
Fast soft recovery	95 ns t_rr with low snap factor (0.5) suppresses high-frequency ringing and EMI in high-di/dt circuits.
Glass passivated junction	Ensures long-term reliability under repeated thermal cycling from –40°C to +150°C junction range.
QUIETIR series optimization	Engineered specifically for conducted EMI reduction in input rectifiers where EMC compliance is critical.
High I_FSM/I_F(AV) ratio	475 A surge vs. 40 A average rating supports robustness against line surges and motor inrush currents.

Applications

Industrial Motor Drives	Uninterruptible Power Supplies (UPS)
Use Scenario: Freewheeling path in IGBT-based three-phase inverter stages of HVAC and pump drives. IC Role / Device Role / Timing Role: Fast-recovery diode providing low-loss current recirculation during IGBT turn-off. Use Value: 95 ns t_rr and soft recovery minimize voltage overshoot across IGBTs, reducing snubber requirements and system cost.	Use Scenario: Input bridge rectification in double-conversion UPS systems with strict EN 55022 Class B EMI limits. IC Role / Device Role / Timing Role: High-voltage AC-to-DC conversion stage suppressing differential-mode noise via controlled recovery. Use Value: QUIETIR soft recovery cuts high-frequency conducted emissions below 30 MHz, easing filter design.
Solar Inverters	Welding Power Supplies
Use Scenario: DC-link clamping and boost-stage freewheeling in string inverters operating at 1000 V nominal bus. IC Role / Device Role / Timing Role: High-V_RRM rectifier handling bidirectional energy flow during MPPT transitions. Use Value: 1000 V V_RRM and 150°C max T_J support reliable operation in outdoor-rated enclosures with wide ambient swings.	Use Scenario: Output rectification in resonant DC welding supplies with high peak current demands. IC Role / Device Role / Timing Role: Primary DC output diode conducting 40 A average while surviving 475 A short-duration surges. Use Value: 475 A I_FSM and 0.6 °C/W R_thJC enable compact thermal design without forced air cooling.

Industrial Motor Drives

Uninterruptible Power Supplies (UPS)

Use Scenario: Freewheeling path in IGBT-based three-phase inverter stages of HVAC and pump drives.

IC Role / Device Role / Timing Role: Fast-recovery diode providing low-loss current recirculation during IGBT turn-off.

Use Value: 95 ns t_rr and soft recovery minimize voltage overshoot across IGBTs, reducing snubber requirements and system cost.

Use Scenario: Input bridge rectification in double-conversion UPS systems with strict EN 55022 Class B EMI limits.

IC Role / Device Role / Timing Role: High-voltage AC-to-DC conversion stage suppressing differential-mode noise via controlled recovery.

Use Value: QUIETIR soft recovery cuts high-frequency conducted emissions below 30 MHz, easing filter design.

Solar Inverters

Welding Power Supplies

Use Scenario: DC-link clamping and boost-stage freewheeling in string inverters operating at 1000 V nominal bus.

IC Role / Device Role / Timing Role: High-V_RRM rectifier handling bidirectional energy flow during MPPT transitions.

Use Value: 1000 V V_RRM and 150°C max T_J support reliable operation in outdoor-rated enclosures with wide ambient swings.

Use Scenario: Output rectification in resonant DC welding supplies with high peak current demands.

IC Role / Device Role / Timing Role: Primary DC output diode conducting 40 A average while surviving 475 A short-duration surges.

Use Value: 475 A I_FSM and 0.6 °C/W R_thJC enable compact thermal design without forced air cooling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH40RQ06D	600 V V_RRM, 40 A I_F(AV), 60 ns t_rr, TO-247 package - lower voltage rating, faster recovery.	Suitable for 400 V DC-link systems only; not interchangeable in 1000 V designs due to blocking limitation.	Select when lower V_RRM and ultra-fast recovery outweigh voltage headroom needs.
IXYS MBR40100CT	100 V V_RRM, 40 A I_F(AV), Schottky construction, 3-pin TO-247 - zero reverse recovery but limited voltage.	Only viable in low-voltage SMPS outputs; cannot replace 40EPF10 in HV input or freewheeling roles.	Choose for <100 V applications where zero Q_rr and low V_F are prioritized over blocking capability.

Compared with STTH40RQ06D and MBR40100CT, the 40EPF10 uniquely balances 1000 V blocking, soft recovery EMI control, and industrial-grade thermal robustness - making it irreplaceable in high-voltage, high-noise-margin rectification where both voltage headroom and clean switching are mandatory.

Availability

40EPF10 is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and uninterruptible power supplies requiring stable component supply, long-lifecycle assurance, and traceable sourcing for production ramp-up.

Supply support for 40EPF10 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 Intertechnology is a global semiconductor and passive component manufacturer specializing in power semiconductors, resistors, capacitors, and sensors for industrial, automotive, and computing markets.

The 40EPF10 belongs to Vishay's QUIETIR HV fast soft recovery diode family, designed specifically for EMI-critical high-voltage rectification and freewheeling in industrial power conversion systems.

FAQ

What is the maximum junction temperature rating for the 40EPF10?

The 40EPF10 has a maximum junction temperature (T_J) rating of +150°C and a minimum of –40°C. This wide operating range supports deployment in harsh environments such as enclosed motor drives and outdoor solar inverters. Thermal design must maintain T_J ≤ 150°C using the specified R_thJC = 0.6 °C/W and appropriate heatsinking. The 40EPF10's glass passivation ensures stability across this full range.

Does the 40EPF10 have a pin-compatible replacement in the same TO-247AC (modified) package?

No documented pin-compatible replacement exists for the 40EPF10 within the same voltage class and soft-recovery profile. While other TO-247AC diodes share the 3-pin layout, the 40EPF10's specific QUIETIR soft recovery characteristics, 1000 V rating, and thermal performance are not replicated in drop-in alternatives. Substitution requires full circuit validation, especially for EMI and surge behavior.

What is the reverse recovery charge (Q_rr) of the 40EPF10, and why does it matter?

The 40EPF10 has a reverse recovery charge (Q_rr) of 1.8 µC at 25°C, measured under standard conditions. This value directly impacts switching losses and voltage overshoot during turn-off. Lower Q_rr reduces EMI and stress on switching devices like IGBTs - a key reason the 40EPF10 is selected for high-di/dt freewheeling paths where clean commutation is essential.

Can the 40EPF10 be used in avalanche mode?

No, the 40EPF10 is not rated or characterized for repetitive avalanche operation. Its absolute maximum ratings specify only non-repetitive surge current (I_FSM) and do not define avalanche energy (E_AS) or ruggedness. Operation beyond V_RRM risks irreversible junction damage. Designers must ensure voltage transients remain within the 1000 V V_RRM limit using appropriate clamping or snubbing.

How does the 40EPF10 differ from standard fast recovery diodes in terms of EMI performance?

The 40EPF10 features soft recovery - characterized by a low snap factor (0.5) and controlled tail current decay - which suppresses high-frequency ringing and dv/dt-induced noise. Standard fast recovery diodes often exhibit abrupt turn-off and higher EMI. This makes the 40EPF10 particularly effective in input rectifiers where conducted EMI must meet EN 55022 Class B limits without oversized filters.

40EPF10 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: TO-247-2

Packaging:: Tube

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 V

Current - Average Rectified (Io):: 40A

Voltage - Forward (Vf) (Max) @ If:: 1.4 V @ 40 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 450 ns

Current - Reverse Leakage @ Vr:: 100 µA @ 1000 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247AC Modified

Operating Temperature - Junction:: -40°C ~ 150°C

40EPF10 FAQ

1.How can I place an order for 40EPF10 through Aetrix?

Please submit a Request for Quotation (RFQ) for 40EPF10 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 40EPF10 reliable?

The price and inventory of 40EPF10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 40EPF10 is usually 5 days.

3.What payment methods are accepted for 40EPF10?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 40EPF10 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 40EPF10?

40EPF10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 40EPF10 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 40EPF10?

For technical support, including 40EPF10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 40EPF10 requirements.

6.How does Aetrix verify that 40EPF10 is sourced from the original manufacturer or authorized distributors?

All 40EPF10 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 40EPF10 meets industry standards.

7.What is the process for return or replacement of 40EPF10?

All 40EPF10 units undergo pre-shipment inspection (PSI). If there is an issue with 40EPF10, 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 40EPF10 part is unused and in its original packaging.

Return procedure for 40EPF10:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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