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

Diotec Semiconductor 1N4003

Name: 1N4003
Brand: Diotec Semiconductor
SKU: 1N4003
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4003

Manufacturer:: Diotec Semiconductor

Category:: Single Diodes

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

Datasheet:: 1N4003.pdf

Description:: DIODE GEN PURP 200V 1A DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:11,047

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Product details

Overview

1N4003 from Diodes Incorporated is a general-purpose silicon rectifier diode in DO-41 package, rated for 200 V peak repetitive reverse voltage, 1.0 A average forward current, and 30 A non-repetitive surge current. It features low forward voltage drop (1.0 V at 1.0 A), low reverse leakage (5.0 µA at 25°C), and operates from –65°C to +150°C - commonly used in AC/DC power supplies, battery chargers, and DC motor control circuits.

For engineers reviewing the 1N4003 datasheet, 1N4003 pinout, 1N4003 application, or 1N4003 equivalent, key selection considerations include its 200 V blocking rating, thermal resistance (100 K/W), junction capacitance (15 pF), surge capability (30 A), and DO-41 mechanical compatibility with legacy through-hole PCB layouts.

Technical Context

This diode uses a diffused PN junction optimized for high-current rectification in single-phase, half-wave 60 Hz applications with resistive or inductive loads. Its design accommodates capacitive-load derating (–20% current) and maintains stable reverse leakage up to 100°C (50 µA).

The device exhibits typical junction capacitance of 15 pF at 4.0 V reverse bias and 1 MHz, supporting moderate-speed switching in line-frequency power conversion. Thermal performance is defined by R_θJA = 100 K/W under standard lead-mount conditions (9.5 mm from case).

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum peak reverse voltage before breakdown; defines safe AC input handling up to ~141 V RMS.
I_O	1.0 A @ T_A = +75°C - Continuous DC output current limit under standard heatsinking conditions.
V_F	1.0 V @ I_F = 1.0 A - Forward conduction loss directly impacts power dissipation (1.0 W at full load).
I_FSM	30 A (8.3 ms half-sine) - Withstands brief inrush surges common during transformer energization or capacitor charging.
I_R	5.0 µA @ 25°C - Low reverse leakage preserves efficiency in high-impedance hold-up or sensing paths.
C_j	15 pF @ 4.0 V, 1 MHz - Limits high-frequency noise coupling and affects snubber design in switching-derived supplies.
R_θJA	100 K/W - Junction-to-ambient thermal resistance determines required board copper area or heatsink for thermal management.

Pinout & Package

Package: DO-41 molded plastic case with cathode band marking; lead finish is bright tin, solderable per MIL-STD-202 Method 208; UL 94V-0 flammability rating; weight ≈ 0.30 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connects to AC source or transformer secondary side; polarity-sensitive for rectification direction.
Cathode (marked with band)	Forward current exit / reverse blocking terminal	Connects to load or filter capacitor; band identifies cathode for correct orientation on PCB.

Key Features

Feature	Design Value
Diffused junction construction	Enables robust surge tolerance (30 A) and stable long-term reliability under thermal cycling.
Low forward voltage (1.0 V)	Reduces conduction loss and self-heating at 1 A, easing thermal design in compact enclosures.
DO-41 mechanical standardization	Ensures direct replacement in legacy through-hole designs without footprint modification.
RoHS-compliant bright tin plating	Supports lead-free reflow and hand-soldering while meeting environmental compliance requirements.

Applications

AC/DC Wall Adapter Power Supply

Battery Charger Input Stage

Use Scenario: Converts 120 VAC mains to unregulated DC using transformer + bridge or half-wave rectification.

IC Role / Device Role / Timing Role: Rectifier diode conducting only positive half-cycles to charge bulk capacitor.

Use Value: 200 V V_RRM safely handles 120 VAC peaks (±170 V); 1.0 A rating supports up to 12 W output.

Use Scenario: Rectifies transformer output feeding linear regulator or constant-current charging circuit for NiMH/Li-ion packs.

IC Role / Device Role / Timing Role: Unidirectional current path enabling DC bus formation prior to regulation or filtering.

Use Value: Low 5.0 µA reverse leakage prevents battery self-discharge during standby; DO-41 fits compact charger PCBs.

DC Motor Polarity Protection

Industrial Control Signal Conditioning

Use Scenario: Placed in series with brushed DC motor supply to block reverse EMF during sudden stop or direction reversal.

IC Role / Device Role / Timing Role: Reverse-polarity clamp protecting driver ICs and power rails from inductive kickback.

Use Value: 30 A I_FSM absorbs short-duration flyback energy without failure; 100°C-rated IR ensures stability in hot enclosures.

Use Scenario: Used in analog input protection networks to shunt overvoltage transients on sensor lines (e.g., 4–20 mA loop interfaces).

IC Role / Device Role / Timing Role: Clamping diode limiting input voltage swing to safe levels for ADC front-end or op-amp inputs.

Use Value: 15 pF C_j minimizes signal distortion at <1 MHz; low leakage avoids DC offset errors in precision measurement paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4003-T from Diodes Inc.	Tape-and-reel packaging (5K/reel), same electrical specs and DO-41 package.	Optimized for automated SMT-compatible through-hole placement; requires reel feeder setup.	Select for high-volume production where pick-and-place efficiency outweighs bulk-handling convenience.
S1M (DO-204AL)	Same 1.0 A / 1000 V rating but smaller SMD package (SMA), lower R_θJA (70 K/W), higher I_FSM (50 A).	Enables surface-mount layout, improved thermal performance, and higher surge margin.	Choose when upgrading from through-hole to SMT or requiring enhanced surge immunity beyond 30 A.

Compared with the 1N4003, the 1N4003-T offers identical performance in tape-and-reel form for automation, while the S1M provides superior thermal and surge capability in a smaller footprint - making it suitable for space-constrained or higher-reliability industrial designs.

Availability

1N4003 is available at Aetrix Electronics and suitable for AC/DC power supplies, battery chargers, and DC motor control circuits requiring stable component supply across prototyping, pilot production, and long-lifecycle industrial programs.

Supply support for 1N4003 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 1N400x series belongs to Diodes' general-purpose rectifier product line, designed for cost-effective, robust line-frequency AC/DC conversion in consumer, industrial, and automotive auxiliary systems.

FAQ

What is the maximum operating temperature for the 1N4003?

The 1N4003 has a specified operating and storage temperature range of –65°C to +150°C. Its maximum junction temperature is +150°C, and thermal derating begins above +75°C ambient - where average forward current must be reduced per the published derating curve (Figure 1 in DS28002).

Can the 1N4003 be used in a full-wave bridge configuration?

Yes - four 1N4003 diodes can be configured as a discrete full-wave bridge rectifier. Each diode blocks up to 200 V peak reverse voltage, supporting input voltages up to ~140 V RMS. Ensure adequate spacing and thermal relief on PCB due to cumulative power dissipation (up to 4 × 1.0 W).

Is the 1N4003 RoHS compliant?

Yes, the 1N4003 carries a lead-free finish and is RoHS compliant per EU Directive 2002/95/EC, with all applicable exemptions applied. The terminals are bright tin-plated and solderable per MIL-STD-202, Method 208.

How does the 1N4003 differ from the 1N4007?

The 1N4003 and 1N4007 share identical forward characteristics (1.0 A, 1.0 V, 30 A surge), but differ in peak reverse voltage: 1N4003 is rated for 200 V, while 1N4007 is rated for 1000 V. Substituting one for the other requires verifying that the reverse voltage stress in the application remains within the lower-rated device's limit.

1N4003 Specifications

Product attributes: Attribute value

Manufacturer:: Diotec Semiconductor

Series:: -

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

Packaging:: Cut Tape (CT)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 1 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 1.5 µs

Current - Reverse Leakage @ Vr:: 5 µA @ 200 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

Operating Temperature - Junction:: -50°C ~ 175°C

1N4003 FAQ

1.How can I place an order for 1N4003 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4003 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 1N4003 reliable?

The price and inventory of 1N4003 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4003 is usually 5 days.

3.What payment methods are accepted for 1N4003?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4003 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4003?

1N4003 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4003 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 1N4003?

For technical support, including 1N4003 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4003 requirements.

6.How does Aetrix verify that 1N4003 is sourced from the original manufacturer or authorized distributors?

All 1N4003 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 1N4003 meets industry standards.

7.What is the process for return or replacement of 1N4003?

All 1N4003 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4003, 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 1N4003 part is unused and in its original packaging.

Return procedure for 1N4003:

1.Submit a request within 90 days.

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

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