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

Taiwan Semiconductor Corporation 1N4937G B0G

Name: 1N4937G B0G
Brand: Taiwan Semiconductor Corporation
SKU: 1N4937G B0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4937G B0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: 1N4937G B0G.pdf

Description:: DIODE GEN PURP 600V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:5,281

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Product details

Overview

1N4937G from Taiwan Semiconductor is a single-die fast recovery rectifier diode in DO-204AL (DO-41) package, rated for 1 A average forward current, 600 V repetitive peak reverse voltage, and 200 ns reverse recovery time, used in high-efficiency DC-DC converters and switching inverters.

For engineers reviewing the 1N4937G datasheet, 1N4937G pinout, 1N4937G application, or 1N4937G equivalent, key selection criteria include its 600 V V_RRM, 30 A I_FSM, 1.2 V V_F at 1 A, 150 °C maximum junction temperature, and AEC-Q101 qualification availability in H-suffix variants.

Technical Context

This device operates as a unidirectional power rectifier with fast recovery characteristics optimized for high-frequency switching topologies. Its 200 ns trr and low 1.2 V forward voltage enable reduced conduction and switching losses in SMPS designs.

The DO-204AL package supports through-hole mounting with pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance, and features a cathode band polarity indicator.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - maximum non-repetitive reverse blocking capability without breakdown
I_F	1 A - continuous average forward current rating at 75 °C ambient
I_FSM	30 A - surge withstand for 8.3 ms half-sine, enabling robust start-up and fault handling
V_F	1.2 V @ 1 A, 25 °C - low conduction loss improving system efficiency
t_rr	200 ns - fast recovery minimizes reverse recovery charge and switching losses
T_J max	150 °C - thermal limit defining safe operating junction temperature range
R_θJA	65 °C/W - thermal resistance from junction to ambient, guiding heatsinking requirements

Pinout & Package

Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with cathode band marking. Lead finish: pure tin, J-STD-002 compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry terminal	Connected to lower-potential side of source; enables current flow when biased positive relative to cathode
Cathode	Forward current exit terminal	Marked by band; connected to higher-potential side of load; defines polarity-sensitive rectification direction

Key Features

Feature	Design Value
Fast recovery time	200 ns trr ensures minimal switching loss in 50–500 kHz SMPS applications
Low forward voltage	1.2 V V_F at 1 A reduces conduction loss and thermal stress under full load
High surge capability	30 A I_FSM supports transient overloads without failure during power-up or line surges
AEC-Q101 qualified option	H-suffix variants meet automotive-grade reliability and stress test requirements
Halogen-free construction	Complies with IEC 61249-2-21, supporting RoHS-compliant and environmentally regulated designs

Applications

DC-DC Converters	Switching Inverters
Use Scenario: Isolated flyback and forward converter secondary-side rectification in telecom and industrial power supplies. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 200 ns t_rr and 1.2 V V_F reduce switching losses and improve efficiency at 100–300 kHz operation.	Use Scenario: Output stage rectification in solar microinverters and UPS systems. IC Role / Device Role / Timing Role: Unidirectional current path enabling DC bus reconstruction after H-bridge AC inversion. Use Value: 600 V V_RRM and 30 A I_FSM support 400 V DC-link operation with margin for transients.
Automotive DC-DC Modules	Industrial SMPS
Use Scenario: 12 V/24 V to 5 V/3.3 V step-down conversion in engine control units and ADAS domain controllers. IC Role / Device Role / Timing Role: Secondary-side freewheeling and rectification diode in synchronous or quasi-resonant topologies. Use Value: AEC-Q101-qualified H-variants ensure reliability under automotive thermal cycling and vibration stress.	Use Scenario: General-purpose rectification in programmable logic controller (PLC) power stages and motor drive auxiliary supplies. IC Role / Device Role / Timing Role: Input bridge or output freewheeling diode in fixed-frequency hard-switched converters. Use Value: 150 °C T_J max and 65 °C/W R_θJA allow operation in enclosed, convection-cooled enclosures up to 85 °C ambient.

DC-DC Converters

Switching Inverters

Use Scenario: Isolated flyback and forward converter secondary-side rectification in telecom and industrial power supplies.

IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 200 ns t_rr and 1.2 V V_F reduce switching losses and improve efficiency at 100–300 kHz operation.

Use Scenario: Output stage rectification in solar microinverters and UPS systems.

IC Role / Device Role / Timing Role: Unidirectional current path enabling DC bus reconstruction after H-bridge AC inversion.

Use Value: 600 V V_RRM and 30 A I_FSM support 400 V DC-link operation with margin for transients.

Automotive DC-DC Modules

Industrial SMPS

Use Scenario: 12 V/24 V to 5 V/3.3 V step-down conversion in engine control units and ADAS domain controllers.

IC Role / Device Role / Timing Role: Secondary-side freewheeling and rectification diode in synchronous or quasi-resonant topologies.

Use Value: AEC-Q101-qualified H-variants ensure reliability under automotive thermal cycling and vibration stress.

Use Scenario: General-purpose rectification in programmable logic controller (PLC) power stages and motor drive auxiliary supplies.

IC Role / Device Role / Timing Role: Input bridge or output freewheeling diode in fixed-frequency hard-switched converters.

Use Value: 150 °C T_J max and 65 °C/W R_θJA allow operation in enclosed, convection-cooled enclosures up to 85 °C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	Same 1 A / 600 V rating; 1.3 V V_F (max), 150 ns t_rr; TO-220AC package	Higher thermal mass but requires PCB footprint change and heatsink mounting	Preferred where lower t_rr and higher surge margin justify SMT-to-through-hole redesign
ON Semiconductor MUR160	1 A / 600 V; 1.7 V V_F (max), 75 ns t_rr; DO-41 package, same pinout	Lower V_F not achieved; faster t_rr improves high-frequency efficiency but increases EMI sensitivity	Drop-in replacement only if layout allows tighter EMI filtering; verify snubber design compatibility

Compared with STTH1R06 and MUR160, the 1N4937G offers balanced performance with industry-standard DO-41 footprint, lower V_F than MUR160, and simpler thermal management than STTH1R06-making it optimal for cost-sensitive, space-constrained industrial and automotive auxiliary supplies.

Availability

1N4937G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and automotive power modules requiring stable component supply across production lifecycles.

Supply support for 1N4937G 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and automotive markets since 1979.

The 1N493xG series is part of TSC's general-purpose fast recovery rectifier product line, engineered for high-reliability, high-efficiency AC/DC and DC/DC power conversion in cost-sensitive, thermally demanding environments.

FAQ

What is the maximum repetitive peak reverse voltage rating for the 1N4937G?

The 1N4937G has a maximum repetitive peak reverse voltage (V_RRM) of 600 V. This rating defines the highest instantaneous reverse voltage the diode can block repeatedly without avalanche breakdown under normal operating conditions. It is the highest voltage grade in the 1N4933G–1N4937G family and is confirmed in the Absolute Maximum Ratings table on page 1 of the official TSC datasheet revision I2104.

Does the 1N4937G have AEC-Q101 qualification?

The base 1N4937G is not AEC-Q101 qualified; however, the variant 1N4937GH is explicitly listed in the Ordering Information section as AEC-Q101 qualified. The "H" suffix denotes automotive-grade testing per AEC-Q101, including stress tests for temperature cycling, humidity, and mechanical shock. Always specify the "H" suffix when automotive qualification is required for the 1N4937G.

What is the forward voltage drop of the 1N4937G at rated current?

The 1N4937G exhibits a maximum forward voltage (V_F) of 1.2 V at 1 A forward current and 25 °C junction temperature, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the conduction loss under typical operating conditions, directly impacting power efficiency and thermal design in the 1N4937G application circuit.

What package type does the 1N4937G use, and what are its key mechanical features?

The 1N4937G uses the DO-204AL (DO-41) axial-leaded package. Key mechanical features include pure tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 rated epoxy molding compound, cathode band polarity marking, and JESD 201 Class 2 whisker resistance. Its weight is approximately 0.330 g, and it is designed for through-hole assembly in high-reliability power applications.

How does the reverse recovery time of the 1N4937G affect its suitability for high-frequency switching?

The 1N4937G has a maximum reverse recovery time (t_rr) of 200 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This fast recovery enables efficient operation in switching power supplies up to ~300 kHz, reducing switching losses and minimizing voltage spikes during turn-off-critical for stable, high-efficiency performance in the 1N4937G application in DC-DC converters and inverters.

1N4937G B0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

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

Packaging:: Bulk

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:: 10pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

Operating Temperature - Junction:: -55°C ~ 150°C

1N4937G B0G FAQ

1.How can I place an order for 1N4937G B0G through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4937G B0G 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 1N4937G B0G reliable?

The price and inventory of 1N4937G B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4937G B0G is usually 5 days.

3.What payment methods are accepted for 1N4937G B0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4937G B0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4937G B0G?

1N4937G B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4937G B0G 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 1N4937G B0G?

For technical support, including 1N4937G B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4937G B0G requirements.

6.How does Aetrix verify that 1N4937G B0G is sourced from the original manufacturer or authorized distributors?

All 1N4937G B0G 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 1N4937G B0G meets industry standards.

7.What is the process for return or replacement of 1N4937G B0G?

All 1N4937G B0G units undergo pre-shipment inspection (PSI). If there is an issue with 1N4937G B0G, 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 1N4937G B0G part is unused and in its original packaging.

Return procedure for 1N4937G B0G:

1.Submit a request within 90 days.

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

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