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

Diodes Incorporated 1N4936-T

Name: 1N4936-T
Brand: Diodes Incorporated
SKU: 1N4936-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4936-T

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

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

Datasheet:: 1N4936-T.pdf

Description:: DIODE GEN PURP 400V 1A DO41

Quantity:: RFQ Add To RFQ list

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Inventory:47,585

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Product details

Overview

1N4936-T from Diodes Incorporated is a 1.0A fast recovery rectifier diode in DO-41 package, rated for 400V peak repetitive reverse voltage (V_RRM), 1.2V forward voltage drop at 1.0A (V_FM), and 200ns reverse recovery time (t_RR), used in AC/DC input stage rectification of offline power supplies and DC-DC converter front-ends.

For engineers reviewing the 1N4936-T datasheet, 1N4936-T pinout, 1N4936-T application, or 1N4936-T equivalent, key selection criteria include V_RRM margin for line surge, t_RR impact on switching loss in high-frequency converters, thermal derating above +75°C ambient, and DO-41 lead-form compatibility with through-hole PCB layouts.

Technical Context

This device employs a diffused junction structure to achieve fast recovery characteristics while maintaining low forward conduction loss. Its 200ns t_RR enables efficient operation in 20–100 kHz SMPS topologies where reverse recovery charge (Q_rr) must be minimized to reduce switching losses and EMI.

The 1.0A average rectified current rating is specified at +75°C case temperature with 9.5mm lead length, and thermal resistance (R_θJA) is 100°C/W - indicating direct PCB copper area and lead length are critical for sustained power handling. Reverse leakage remains ≤5.0μA at 400V and +25°C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Withstands peak line voltage up to 283V RMS (e.g., 230VAC + 20% surge) without breakdown.
I_O	1.0 A @ T_A = +75°C - Sustained DC output current capability under standard mounting conditions.
V_FM	1.2 V @ I_F = 1.0A - Contributes ~1.2W conduction loss per diode in full-wave bridge at full load.
t_RR	200 ns - Limits reverse recovery current spike and associated switching loss in 50–100 kHz converters.
I_FSM	30 A (8.3ms half-sine) - Survives cold-start inrush and lightning-induced surges in AC input stages.
R_θJA	100 °C/W - Requires ≥1 cm² copper pour and short leads to maintain junction temp <150°C at full load.

Pinout & Package

DO-41 molded plastic package with axial leads; cathode identified by band marking; polarity-sensitive mounting; RoHS-compliant bright tin plating; UL 94V-0 flammability rating.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to AC source or transformer secondary; must withstand full surge current path.
Cathode	Forward current exit point	Marked with band; connects to bulk capacitor positive or downstream switch node; carries full rectified current.

Key Features

Feature	Design Value
Fast recovery (200 ns)	Reduces switching loss and EMI generation in high-frequency SMPS versus general-purpose rectifiers (e.g., 1N4007).
Low V_F (1.2 V)	Minimizes conduction loss in 1A-class input rectifiers, improving efficiency over higher-V_F alternatives.
30A surge rating	Supports robust cold-start and transient immunity in unregulated AC/DC inputs without external fusing.
DO-41 axial package	Enables manual or automated through-hole assembly; compatible with legacy board designs and repair workflows.

Applications

AC/DC Adapter Input Rectification

Industrial DC Power Supply Front-End

Use Scenario: 230VAC-to-12VDC wall adapter with bridge rectifier and bulk capacitor.

IC Role / Device Role / Timing Role: Discrete rectifier in single-phase full-wave bridge configuration.

Use Value: 400V V_RRM provides 43% margin over 230VAC peak (325V), ensuring reliability during brownouts and surges.

Use Scenario: 115/230VAC industrial control power supply feeding PLC I/O modules.

IC Role / Device Role / Timing Role: Primary-side rectifier in non-isolated buck-derived topology.

Use Value: 200ns t_RR limits reverse recovery energy dissipation, reducing heatsink requirements in enclosed enclosures.

UPS Battery Charger Input Stage

LED Driver Auxiliary Supply Rectifier

Use Scenario: Online UPS with dual-input rectifier (utility + generator) feeding battery charging circuit.

IC Role / Device Role / Timing Role: Input rectifier handling bidirectional line transients and generator waveform distortion.

Use Value: 30A I_FSM withstands generator start-up surges and utility fault currents without degradation.

Use Scenario: Off-line LED driver with auxiliary 12V bias supply derived from main AC input.

IC Role / Device Role / Timing Role: Low-current rectifier for auxiliary rail powering control ICs and gate drivers.

Use Value: 5.0μA max IR at 400V ensures minimal standby leakage, supporting <100mW no-load consumption targets.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
RS1J-T	V_RRM = 600V, t_RR = 150ns, V_F = 1.3V @ 1A	Higher voltage margin and faster recovery, but slightly higher conduction loss	Preferred for 277VAC lighting systems or designs requiring tighter EMI control.
1N4937-T	V_RRM = 600V, identical t_RR, V_F, and package	Same thermal and switching behavior, only higher blocking voltage	Select when future-proofing against higher line voltages or extended surge requirements.

Compared with RS1J-T, 1N4936-T offers lower forward loss but slower recovery; compared with 1N4937-T, it trades 200V blocking headroom for cost and availability advantages in 230VAC systems.

Availability

1N4936-T is available at Aetrix Electronics and suitable for AC/DC adapters, industrial DC power supplies, UPS battery chargers, and LED driver auxiliary supplies requiring stable component supply and long-term manufacturability.

Supply support for 1N4936-T 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions.

The 1N4933–1N4937 series targets cost-sensitive, high-volume AC/DC front-end rectification, balancing speed, voltage rating, and thermal performance in legacy and new-design through-hole power supplies.

FAQ

What is the maximum operating temperature for 1N4936-T?

The 1N4936-T has an operating junction temperature range of –65°C to +150°C. Its average forward current rating drops linearly above +75°C ambient, reaching zero at approximately +150°C case temperature. Derating curves in the datasheet show usable current falls to ~0.6A at +100°C ambient under standard mounting.

Is 1N4936-T suitable for high-frequency switching applications above 100 kHz?

No - while its 200ns reverse recovery time supports operation up to ~100 kHz, significant Q_rr-related losses and EMI increase beyond that. For >100 kHz designs, ultrafast rectifiers like the RS1J-T (150ns) or Schottky diodes are recommended to minimize recovery-related dissipation and noise.

How does the DO-41 package affect thermal performance?

The DO-41 package has a junction-to-ambient thermal resistance of 100°C/W under standard test conditions (9.5mm lead length, free air). Effective thermal management requires PCB copper land connections, reduced lead length, and airflow - otherwise, junction temperature can exceed 150°C even at 0.7A continuous current.

Can 1N4936-T replace 1N4007 in existing designs?

Only if the design operates below 400V peak reverse voltage and benefits from faster recovery. The 1N4007 (1000V, 30μs t_RR) is slower and higher-V_F; substituting 1N4936-T improves efficiency and EMI but risks avalanche failure in 277VAC or surge-heavy environments due to lower V_RRM.

1N4936-T Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

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:: 15pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-41

Operating Temperature - Junction:: -65°C ~ 150°C

1N4936-T FAQ

1.How can I place an order for 1N4936-T through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4936-T 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 1N4936-T reliable?

The price and inventory of 1N4936-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4936-T is usually 5 days.

3.What payment methods are accepted for 1N4936-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4936-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4936-T?

1N4936-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4936-T 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 1N4936-T?

For technical support, including 1N4936-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4936-T requirements.

6.How does Aetrix verify that 1N4936-T is sourced from the original manufacturer or authorized distributors?

All 1N4936-T 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 1N4936-T meets industry standards.

7.What is the process for return or replacement of 1N4936-T?

All 1N4936-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N4936-T, 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 1N4936-T part is unused and in its original packaging.

Return procedure for 1N4936-T:

1.Submit a request within 90 days.

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

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