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

Diodes Incorporated 1N4935L-T

Name: 1N4935L-T
Brand: Diodes Incorporated
SKU: 1N4935L-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4935L-T

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

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

Datasheet:: 1N4935L-T.pdf

Description:: DIODE GEN PURP 200V 1A DO41

Quantity:: RFQ Add To RFQ list

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Inventory:7,431

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Product details

Overview

1N4935L-T from Diodes Incorporated is a 1.0A fast recovery rectifier diode in DO-41 package, rated for 200V 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.

For engineers reviewing the 1N4935L-T datasheet, 1N4935L-T pinout, 1N4935L-T application, or 1N4935L-T equivalent, key selection criteria include V_RRM, I_O, t_RR, thermal resistance (R_θJA = 100°C/W), and surge rating (I_FSM = 30A), especially for cost-sensitive 5–25W flyback and bridge rectifier designs.

Technical Context

This device employs a diffused junction structure to achieve fast switching with low forward conduction loss and controlled minority carrier lifetime, enabling efficient operation at 50/60Hz and moderate-frequency SMPS input stages. Its 200ns t_RR minimizes switching losses during commutation while maintaining low IRM (5.0µA @ 25°C) and stable capacitance (15pF @ 4V).

The DO-41 package supports through-hole mounting with 9.5mm lead length for thermal derating compliance; R_θJA = 100°C/W reflects standard PCB layout assumptions, and the 30A non-repetitive surge rating accommodates line-voltage transients in unregulated AC inputs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum peak reverse voltage sustainable without breakdown; sets minimum insulation margin for 120/230VAC input bridges.
I_O	1.0 A @ T_A = +75°C - Continuous average forward current capability under defined ambient and lead-length conditions.
V_FM	1.2 V @ I_F = 1.0A - Forward conduction loss directly impacts efficiency and thermal rise in rectifier path.
t_RR	200 ns - Reverse recovery time determines switching loss and EMI generation during diode turn-off.
I_FSM	30 A (8.3ms half-sine) - Peak surge withstand capability for cold-start inrush and lightning-induced line surges.
R_θJA	100 °C/W - Junction-to-ambient thermal resistance defines temperature rise per watt dissipated on standard PCB layout.
I_RM	5.0 µA @ 25°C - Low leakage ensures minimal standby power loss and stable DC bus hold-up.

Pinout & Package

DO-41 molded plastic package with axial leads; cathode identified by band marking; polarity-critical for correct rectifier orientation in circuit. Mounting position unrestricted; RoHS-compliant bright tin plating ensures solderability per MIL-STD-202 Method 208.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to AC source or transformer secondary; must handle full surge and RMS current.
Cathode	Forward current exit / reverse blocking terminal	Marked with band; connects to positive DC rail; sustains full V_RRM during off-state.

Key Features

Feature	Design Value
Fast recovery (200ns)	Reduces switching loss and high-frequency ringing in 50/60Hz and quasi-resonant rectifier applications.
Low V_F (1.2V @ 1A)	Lowers conduction loss and thermal stress compared to standard recovery diodes, easing heatsinking in compact adapters.
30A surge rating	Withstands repeated cold-start inrush without degradation, eliminating need for external NTC or fusing in basic designs.
DO-41 mechanical robustness	UL 94V-0 rated plastic case provides flame resistance and mechanical stability for automated through-hole assembly.
RoHS-compliant finish	Bright tin plating ensures reliable solder joint formation and long-term intermetallic integrity in lead-free reflow processes.

Applications

AC/DC Wall Adapters

Industrial Control Power Supplies

Use Scenario: 5–15W universal-input (90–264VAC) offline flyback converters powering IoT sensors and PLC I/O modules.

IC Role / Device Role / Timing Role: Primary-side bridge or single-phase rectifier converting AC mains to bulk DC; operates at line frequency with no timing function.

Use Value: 1.2V V_F limits conduction loss to <1.2W at 1A, enabling thermally constrained PCB layouts without forced air cooling.

Use Scenario: 12–24V DC power rails derived from 230VAC distribution panels in factory automation cabinets.

IC Role / Device Role / Timing Role: Input rectifier in unregulated linear or buck-derived auxiliary supplies; no control or timing role.

Use Value: 30A I_FSM tolerates repeated motor-start transients and contactor switching spikes without failure.

LED Driver Input Stages

Appliance Power Inputs

Use Scenario: Constant-voltage LED drivers for commercial lighting operating from 120/230VAC with passive PFC.

IC Role / Device Role / Timing Role: Half-wave or full-wave rectifier feeding bulk capacitor; zero timing dependency.

Use Value: 200ns t_RR suppresses high-frequency noise coupling into downstream PWM ICs, reducing EMI filter component count.

Use Scenario: Mains-powered home appliances (microwaves, washing machines) requiring robust, low-cost primary rectification.

IC Role / Device Role / Timing Role: Main AC input rectifier in transformerless or isolated SMPS front-end; no signal or timing function.

Use Value: DO-41 package enables automated insertion and wave soldering, supporting high-volume manufacturing with proven field reliability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
RS202M	V_RRM = 200V, I_O = 2.0A, t_RR = 500ns, DO-15 package	Higher current rating but slower recovery; larger footprint	Preferred where higher I_O margin is needed and EMI sensitivity is low.
1N4935G	Identical electrical specs; green (halogen-free) variant with same DO-41 package	No functional difference; meets stricter environmental compliance	Select when halogen-free certification is required for end-product regulatory submission.

Compared with RS202M, 1N4935L-T offers faster switching (200ns vs. 500ns) for lower EMI in compact designs, while 1N4935G provides identical performance with enhanced environmental compliance-neither is pin-compatible with SMD alternatives like ES1B.

Availability

1N4935L-T is available at Aetrix Electronics and suitable for AC/DC wall adapters, industrial control power supplies, and LED driver input stages requiring stable component supply and long-lifecycle support.

Supply support for 1N4935L-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, cost-optimized components for power management and signal conditioning.

The 1N4933–1N4937 series targets cost-sensitive, high-volume rectification applications where fast recovery, surge robustness, and DO-41 manufacturability are prioritized over ultra-low V_F or SMD integration.

FAQ

What is the maximum junction temperature for continuous operation?

The 1N4935L-T has an operating junction temperature range of –65°C to +150°C. For continuous operation at rated I_O = 1.0A, thermal design must ensure T_J stays within this limit using the specified R_θJA = 100°C/W and appropriate PCB copper area or airflow.

Is 1N4935L-T suitable for use in a full-wave bridge configuration?

Yes - four 1N4935L-T diodes can be assembled into a discrete full-wave bridge rectifier. Each device handles one quadrant with its 200V V_RRM and 30A I_FSM, making it appropriate for 120/230VAC inputs up to ~15W output power in unregulated designs.

How does the 200ns reverse recovery time affect EMI performance?

A 200ns t_RR reduces high-frequency spectral content during diode turn-off, lowering conducted and radiated EMI compared to standard recovery diodes (t_RR > 2µs). This allows simpler, lower-cost EMI filters in Class B consumer power supplies.

Can 1N4935L-T replace 1N4007 in existing designs?

Only if V_RRM ≥ 600V is not required. 1N4935L-T (200V) offers faster recovery and lower V_F than 1N4007 (1000V, 30µs t_RR), but cannot substitute in 230VAC designs needing ≥600V blocking. Use only where system peak reverse voltage remains ≤200V.

1N4935L-T Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 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 @ 200 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

1N4935L-T FAQ

1.How can I place an order for 1N4935L-T through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4935L-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 1N4935L-T reliable?

The price and inventory of 1N4935L-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4935L-T is usually 5 days.

3.What payment methods are accepted for 1N4935L-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4935L-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4935L-T?

1N4935L-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4935L-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 1N4935L-T?

For technical support, including 1N4935L-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4935L-T requirements.

6.How does Aetrix verify that 1N4935L-T is sourced from the original manufacturer or authorized distributors?

All 1N4935L-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 1N4935L-T meets industry standards.

7.What is the process for return or replacement of 1N4935L-T?

All 1N4935L-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N4935L-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 1N4935L-T part is unused and in its original packaging.

Return procedure for 1N4935L-T:

1.Submit a request within 90 days.

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

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