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

Taiwan Semiconductor Corporation 1N4936G

Name: 1N4936G
Brand: Taiwan Semiconductor Corporation
SKU: 1N4936G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4936G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: 1N4936G.pdf

Description:: DIODE GEN PURP 400V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:9,500

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Product details

Overview

1N4936G from Taiwan Semiconductor is a single-die fast recovery rectifier diode rated for 1 A average forward current, 400 V repetitive peak reverse voltage (V_RRM), and 200 ns reverse recovery time (t_rr), used in switching-mode power supplies and DC-DC converters where low conduction loss and rapid turn-off are required.

For engineers reviewing the 1N4936G datasheet, 1N4936G pinout, 1N4936G application, or 1N4936G equivalent, key selection criteria include its DO-41 package compatibility, 1.2 V max forward voltage at 1 A, 30 A surge capability, AEC-Q101 qualification option, and thermal resistance of 65 °C/W.

Technical Context

The 1N4936G operates as a unidirectional silicon junction rectifier with fast recovery characteristics enabled by optimized carrier lifetime control. Its 400 V V_RRM rating supports medium-voltage SMPS front-end and output rectification, while the 200 ns t_rr minimizes switching losses in 50–200 kHz converters.

Thermally, it sustains operation up to +150 °C junction temperature with 65 °C/W R_θJA, and exhibits low leakage-5 µA max at 25 °C and 150 µA at 125 °C under rated reverse voltage-ensuring stable performance across automotive and industrial ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum non-repetitive reverse blocking voltage; defines usable input/output voltage range in flyback, boost, and buck converters
I_F	1 A - Continuous average forward current; sets maximum steady-state power delivery capability without derating
t_rr	200 ns - Measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables efficient operation in high-frequency switching topologies
V_F max	1.2 V @ 1 A, 25 °C - Directly determines conduction loss (P_cond ≈ 1.2 W at full load); impacts thermal design and efficiency
I_FSM	30 A - Non-repetitive surge current (8.3 ms half-sine); supports inrush and transient overload tolerance in power supplies
R_θJA	65 °C/W - Junction-to-ambient thermal resistance in free-air; defines minimum heatsinking requirement for 1 A continuous operation

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking. Leads are pure tin-plated and solderable per J-STD-002; meets UL 94V-0 and JESD201 Class 2 whisker requirements.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Forward current entry point	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) in half-wave or full-wave rectifier configurations
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to output filter capacitor or positive rail; polarity marking prevents reverse-bias installation error

Key Features

Feature	Design Value
Fast recovery (t_rr ≤ 200 ns)	Reduces switching losses and EMI generation in 50–200 kHz SMPS designs compared to standard rectifiers
Low V_F (max 1.2 V @ 1 A)	Lowers conduction loss by ~15–20% versus legacy 1N400x series, improving efficiency in low-voltage output stages
AEC-Q101 qualified version available	Validated for automotive under-hood applications including engine control modules and body electronics power rails
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and global environmental regulations for industrial and consumer end equipment

Applications

AC-DC Adapter Power Supply	Automotive Body Control Module (BCM)
Use Scenario: Secondary-side rectification in 12–24 V output flyback adapters powering IoT gateways and smart home hubs. IC Role / Device Role / Timing Role: Fast recovery rectifier converting high-frequency transformer output to regulated DC; replaces slower 1N4007 in efficiency-critical designs. Use Value: 200 ns t_rr reduces switching node ringing and improves light-load efficiency by minimizing reverse recovery charge loss.	Use Scenario: Input rectification for 12 V battery-supplied BCMs managing door locks, lighting, and window motors. IC Role / Device Role / Timing Role: Polarity protection and AC ripple suppression on main power rail; selected for AEC-Q101-compliant variant. Use Value: 30 A I_FSM withstands jump-start surges; 150 °C T_J_MAX ensures reliability in under-dash thermal environments.
Industrial DC-DC Converter	LED Driver Secondary Rectification
Use Scenario: Output rectification in isolated 48 V input, 5/12 V output DC-DC modules for PLC I/O cards. IC Role / Device Role / Timing Role: Unidirectional current path with fast turn-off to minimize cross-conduction loss in synchronous rectifier-assisted topologies. Use Value: 65 °C/W R_θJA allows direct PCB mounting without heatsink in 1 A continuous designs, reducing BOM cost.	Use Scenario: Secondary-side rectification in constant-current LED drivers for commercial signage and street lighting. IC Role / Device Role / Timing Role: High-reliability rectifier handling 100% duty-cycle conduction with minimal thermal drift. Use Value: 5 µA max I_R at 25 °C ensures negligible leakage current in high-impedance current-sense feedback paths.

AC-DC Adapter Power Supply

Automotive Body Control Module (BCM)

Use Scenario: Secondary-side rectification in 12–24 V output flyback adapters powering IoT gateways and smart home hubs.

IC Role / Device Role / Timing Role: Fast recovery rectifier converting high-frequency transformer output to regulated DC; replaces slower 1N4007 in efficiency-critical designs.

Use Value: 200 ns t_rr reduces switching node ringing and improves light-load efficiency by minimizing reverse recovery charge loss.

Use Scenario: Input rectification for 12 V battery-supplied BCMs managing door locks, lighting, and window motors.

IC Role / Device Role / Timing Role: Polarity protection and AC ripple suppression on main power rail; selected for AEC-Q101-compliant variant.

Use Value: 30 A I_FSM withstands jump-start surges; 150 °C T_J_MAX ensures reliability in under-dash thermal environments.

Industrial DC-DC Converter

LED Driver Secondary Rectification

Use Scenario: Output rectification in isolated 48 V input, 5/12 V output DC-DC modules for PLC I/O cards.

IC Role / Device Role / Timing Role: Unidirectional current path with fast turn-off to minimize cross-conduction loss in synchronous rectifier-assisted topologies.

Use Value: 65 °C/W R_θJA allows direct PCB mounting without heatsink in 1 A continuous designs, reducing BOM cost.

Use Scenario: Secondary-side rectification in constant-current LED drivers for commercial signage and street lighting.

IC Role / Device Role / Timing Role: High-reliability rectifier handling 100% duty-cycle conduction with minimal thermal drift.

Use Value: 5 µA max I_R at 25 °C ensures negligible leakage current in high-impedance current-sense feedback paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R04	Same 1 A / 400 V rating; t_rr = 45 ns (faster), V_F = 1.3 V (higher), DO-41 package	Better suited for >300 kHz converters requiring ultra-fast recovery; higher V_F increases conduction loss	Select STTH1R04 when t_rr reduction outweighs V_F penalty; verify layout thermal margin due to higher dissipation
ON Semi MUR140	Same 1 A / 400 V; t_rr = 50 ns, V_F = 1.25 V, DO-41, AEC-Q101 qualified	Offers tighter t_rr spec and automotive qualification; slightly higher V_F than 1N4936G	Prefer MUR140 for new automotive designs requiring certified fast recovery; 1N4936G remains optimal for cost-sensitive industrial use

Compared with STTH1R04 and MUR140, the 1N4936G delivers balanced performance with lower V_F than both alternatives and sufficient t_rr for 100–200 kHz applications, making it ideal for cost-driven industrial and consumer power supplies where ultra-fast recovery is unnecessary.

Availability

1N4936G is available at Aetrix Electronics and suitable for AC-DC adapters, automotive body control modules, and industrial DC-DC converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant discrete rectification.

Supply support for 1N4936G 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, automotive, and consumer markets since 1979.

The 1N493xG series belongs to TSC's fast recovery rectifier product line, engineered for high-efficiency switching power conversion in cost-sensitive, thermally constrained applications where reliability and regulatory compliance are mandatory.

FAQ

What is the repetitive peak reverse voltage (V_RRM) of the 1N4936G?

The 1N4936G has a repetitive peak reverse voltage (V_RRM) of 400 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version I2104). This value defines the maximum allowable reverse-biased voltage the device can block repeatedly without breakdown, and is specific to the 1N4936G within the 1N4933G–1N4937G family.

Is the 1N4936G AEC-Q101 qualified?

The base 1N4936G is not automatically AEC-Q101 qualified; however, the AEC-Q101-compliant variant is designated as 1N4936GH (with "H" suffix) per the Ordering Information section. The 1N4936G itself meets all electrical and mechanical specs but requires the "H" suffix for automotive-grade qualification documentation and testing.

What is the forward voltage drop of the 1N4936G at rated current?

The 1N4936G has 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 worst-case conduction loss for thermal and efficiency calculations in the 1N4936G.

What package type does the 1N4936G use?

The 1N4936G uses the DO-204AL (DO-41) axial-leaded package, as explicitly stated in Mechanical Data, Absolute Maximum Ratings, and Ordering Information sections. It features pure tin-plated leads, UL 94V-0 molding compound, and cathode polarity indicated by a band-fully consistent across all 1N493xG variants.

What is the reverse recovery time (t_rr) specification for the 1N4936G?

The 1N4936G has a maximum reverse recovery time (t_rr) of 200 ns, tested under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions per the Electrical Specifications table. This parameter is identical across the entire 1N4933G–1N4937G family and directly impacts switching loss and EMI in high-frequency converter designs using the 1N4936G.

1N4936G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 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 @ 400 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

1N4936G FAQ

1.How can I place an order for 1N4936G through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4936G 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 1N4936G reliable?

The price and inventory of 1N4936G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4936G is usually 5 days.

3.What payment methods are accepted for 1N4936G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4936G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4936G?

1N4936G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4936G 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 1N4936G?

For technical support, including 1N4936G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4936G requirements.

6.How does Aetrix verify that 1N4936G is sourced from the original manufacturer or authorized distributors?

All 1N4936G 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 1N4936G meets industry standards.

7.What is the process for return or replacement of 1N4936G?

All 1N4936G units undergo pre-shipment inspection (PSI). If there is an issue with 1N4936G, 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 1N4936G part is unused and in its original packaging.

Return procedure for 1N4936G:

1.Submit a request within 90 days.

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

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