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

Vishay General Semiconductor - Diodes Division 1N4937E-E3/53

Name: 1N4937E-E3/53
Brand: Vishay General Semiconductor - Diodes Division
SKU: 1N4937E-E3/53
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4937E-E3/53

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: 1N4937E-E3/53.pdf

Description:: DIODE GEN PURP 600V 1A DO204AL

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Product details

Overview

1N4937E-E3/53 from Vishay General Semiconductor is a fast-switching plastic rectifier diode with 600 V maximum repetitive peak reverse voltage, 1.0 A average forward rectified current, 200 ns reverse recovery time, 1.2 V forward voltage at 1.0 A, and DO-41 package; used in high-efficiency power supply rectification and freewheeling applications.

For engineers reviewing the 1N4937E-E3/53 datasheet, 1N4937E-E3/53 pinout, 1N4937E-E3/53 application, or 1N4937E-E3/53 equivalent, key selection criteria include V_RRM = 600 V, I_F(AV) = 1.0 A, t_rr = 200 ns, low leakage (I_R = 5.0 μA @ 25 °C), and DO-41 mechanical compatibility for through-hole power conversion designs.

Technical Context

This device is a single-junction, silicon planar epitaxial fast recovery rectifier optimized for switching-mode power supplies and DC-DC converters where rapid turn-off minimizes switching losses. Its 200 ns reverse recovery time and 1.2 V forward voltage reflect a balanced trade-off between conduction and switching performance.

The DO-41 package supports 30 A non-repetitive surge current (I_FSM) and operates from –50 °C to +150 °C junction temperature, with thermal resistance R_θJA = 55 °C/W and R_θJL = 25 °C/W under standard PCB mounting conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - blocks up to 600 V repetitive reverse voltage, suitable for 400 V AC input rectification with safety margin
I_F(AV)	1.0 A - continuous forward current rating at 75 °C with 0.375" lead length, defines steady-state power handling
t_rr	200 ns - measured at I_F = 1.0 A, V_R = 30 V, dI/dt = 50 A/μs, enables operation up to ~500 kHz switching frequencies
V_F	1.2 V - forward voltage drop at 1.0 A, directly determines conduction loss and thermal dissipation
I_R	5.0 μA @ 25 °C - low reverse leakage ensures minimal standby power loss in high-impedance circuits
T_J max.	+150 °C - maximum junction temperature allows reliable operation in enclosed or high-ambient environments
C_J	12 pF @ 4.0 V, 1 MHz - junction capacitance impacts high-frequency noise and snubber design

Pinout & Package

Package: DO-41 (DO-204AL), molded epoxy body with matte tin-plated leads; polarity indicated by cathode band; RoHS-compliant (suffix E3), commercial grade.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of load or source during conduction; must handle full I_F(AV) and I_FSM
Cathode	Forward current exit / reverse blocking terminal	Marked with color band; carries return current and sustains full V_RRM during off-state

Key Features

Feature	Design Value
Fast switching	200 ns t_rr enables efficient operation in SMPS and DC-DC converters above 100 kHz
Low forward voltage	1.2 V V_F at 1.0 A reduces conduction losses and thermal stress vs. standard rectifiers
High surge capability	30 A I_FSM withstands inrush and transient overloads without failure
Low leakage	5.0 μA I_R at 25 °C maintains efficiency in standby and high-impedance bias networks
UL 94 V-0 molding	Epoxy case meets flammability standard for safety-critical power equipment

Applications

AC/DC Power Supply Rectification	Inverter Freewheeling Diode
Use Scenario: Input stage rectification in offline switch-mode power supplies converting 230 V AC to DC bus. IC Role / Device Role / Timing Role: Fast recovery rectifier conducting during positive half-cycle, blocking during negative half-cycle. Use Value: 600 V V_RRM provides 2× safety margin over 325 V peak AC line; 200 ns t_rr limits switching loss at 65–100 kHz operation.	Use Scenario: Clamp path for inductive load current decay in motor drive inverters. IC Role / Device Role / Timing Role: Freewheeling path for back-EMF energy during MOSFET/IGBT turn-off. Use Value: 30 A I_FSM handles motor startup surges; low V_F minimizes clamp power dissipation during extended decay periods.
DC-DC Converter Output Rectification	Telecom Power Shelf Protection
Use Scenario: Secondary-side rectification in isolated flyback or forward converters for 12 V/24 V outputs. IC Role / Device Role / Timing Role: Synchronous or asynchronous rectifier delivering regulated DC output. Use Value: 1.2 V V_F balances efficiency and cost vs. Schottky alternatives; DO-41 footprint simplifies layout and rework.	Use Scenario: Reverse polarity and overvoltage protection in telecom power distribution units. IC Role / Device Role / Timing Role: Series-blocking diode preventing battery or backup supply backfeed. Use Value: 5.0 μA I_R ensures negligible standby drain; 150 °C T_J max supports operation in sealed, fanless enclosures.

AC/DC Power Supply Rectification

Inverter Freewheeling Diode

Use Scenario: Input stage rectification in offline switch-mode power supplies converting 230 V AC to DC bus.

IC Role / Device Role / Timing Role: Fast recovery rectifier conducting during positive half-cycle, blocking during negative half-cycle.

Use Value: 600 V V_RRM provides 2× safety margin over 325 V peak AC line; 200 ns t_rr limits switching loss at 65–100 kHz operation.

Use Scenario: Clamp path for inductive load current decay in motor drive inverters.

IC Role / Device Role / Timing Role: Freewheeling path for back-EMF energy during MOSFET/IGBT turn-off.

Use Value: 30 A I_FSM handles motor startup surges; low V_F minimizes clamp power dissipation during extended decay periods.

DC-DC Converter Output Rectification

Telecom Power Shelf Protection

Use Scenario: Secondary-side rectification in isolated flyback or forward converters for 12 V/24 V outputs.

IC Role / Device Role / Timing Role: Synchronous or asynchronous rectifier delivering regulated DC output.

Use Value: 1.2 V V_F balances efficiency and cost vs. Schottky alternatives; DO-41 footprint simplifies layout and rework.

Use Scenario: Reverse polarity and overvoltage protection in telecom power distribution units.

IC Role / Device Role / Timing Role: Series-blocking diode preventing battery or backup supply backfeed.

Use Value: 5.0 μA I_R ensures negligible standby drain; 150 °C T_J max supports operation in sealed, fanless enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 600 V, I_F(AV) = 1.0 A, t_rr = 75 ns, VF = 1.3 V, DO-41	Shorter t_rr improves high-frequency efficiency but increases cost and EMI sensitivity	Select when operating >200 kHz or requiring lowest possible switching loss
1N5408G	V_RRM = 1000 V, I_F(AV) = 3.0 A, t_rr = 2000 ns, VF = 1.1 V, DO-201AD	Slower recovery limits use to ≤20 kHz; higher current and voltage rating suit linear supplies	Select for high-voltage, low-frequency rectification where surge robustness outweighs speed

Compared with STTH1R06 and 1N5408G, the 1N4937E-E3/53 delivers optimal balance of speed (200 ns), voltage rating (600 V), and cost for mid-frequency SMPS and industrial power conversion-without over-specifying t_rr or sacrificing DO-41 compatibility.

Availability

1N4937E-E3/53 is available at Aetrix Electronics and suitable for AC/DC power supply rectification, inverter freewheeling, and telecom power shelf protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for 1N4937E-E3/53 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 and performance across industrial, automotive, and computing markets.

The 1N493x family is designed specifically for cost-sensitive, high-volume fast rectification in consumer and telecom power systems where DO-41 compatibility, 1 A current handling, and sub-μs recovery are essential.

FAQ

What is the maximum junction temperature rating for the 1N4937E-E3/53?

The 1N4937E-E3/53 has a maximum junction temperature (T_J) of +150 °C, verified per Vishay Document Number 88508. This rating enables reliable operation in enclosed power supplies and industrial environments where ambient temperatures exceed 70 °C. Derating curves in the datasheet define safe current limits at elevated temperatures, and the device maintains specified electrical characteristics up to this limit.

Does the 1N4937E-E3/53 meet RoHS requirements?

Yes, the 1N4937E-E3/53 is RoHS-compliant, as confirmed by its "E3" suffix and documentation in Vishay's material categorization notice (www.vishay.com/doc?99912). The matte tin-plated leads and UL 94 V-0 epoxy molding compound comply with Directive 2011/65/EU, and no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances exceed threshold limits.

What is the reverse recovery time (t_rr) specification for the 1N4937E-E3/53?

The 1N4937E-E3/53 has a maximum reverse recovery time (t_rr) of 200 ns, measured under standardized conditions: I_F = 1.0 A, V_R = 30 V, dI/dt = 50 A/μs, and I_Rr = 10 % of I_Rm. This value is consistent across production lots and forms the basis for high-frequency rectifier selection in switch-mode power supplies operating up to 500 kHz.

How does the forward voltage (V_F) of the 1N4937E-E3/53 compare to other 1 A fast rectifiers?

The 1N4937E-E3/53 specifies a maximum forward voltage (V_F) of 1.2 V at 1.0 A and 25 °C, which is typical for silicon fast recovery diodes in this class. It is slightly higher than Schottky alternatives (e.g., 0.5 V) but offers superior reverse voltage capability (600 V vs. ≤100 V) and thermal stability-making it appropriate where high V_RRM and reliability outweigh ultra-low V_F.

What packaging options are available for the 1N4937E-E3/53?

The 1N4937E-E3/53 is supplied in tape-and-reel format (13" diameter paper tape, 5500 units per reel, package code "54") and ammo pack (3000 units, package code "73"), as documented in Vishay's ordering information table. Both variants use the same DO-41 package and RoHS-compliant construction; the choice depends on automated assembly requirements and production lot sizing.

1N4937E-E3/53 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Box (TB)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 600 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 1 A

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

Reverse Recovery Time (trr):: 200 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 600 V

Capacitance @ Vr, F:: 12pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

Operating Temperature - Junction:: -

1N4937E-E3/53 FAQ

1.How can I place an order for 1N4937E-E3/53 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4937E-E3/53 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 1N4937E-E3/53 reliable?

The price and inventory of 1N4937E-E3/53 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4937E-E3/53 is usually 5 days.

3.What payment methods are accepted for 1N4937E-E3/53?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4937E-E3/53 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4937E-E3/53?

1N4937E-E3/53 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4937E-E3/53 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 1N4937E-E3/53?

For technical support, including 1N4937E-E3/53 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4937E-E3/53 requirements.

6.How does Aetrix verify that 1N4937E-E3/53 is sourced from the original manufacturer or authorized distributors?

All 1N4937E-E3/53 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 1N4937E-E3/53 meets industry standards.

7.What is the process for return or replacement of 1N4937E-E3/53?

All 1N4937E-E3/53 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4937E-E3/53, 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 1N4937E-E3/53 part is unused and in its original packaging.

Return procedure for 1N4937E-E3/53:

1.Submit a request within 90 days.

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

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