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

Diodes Incorporated 1N4003-B

Name: 1N4003-B
Brand: Diodes Incorporated
SKU: 1N4003-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4003-B

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

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

Datasheet:: 1N4003-B.pdf

Description:: DIODE GEN PURP 200V 1A DO41

Quantity:: RFQ Add To RFQ list

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Inventory:2,094

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Product details

Overview

1N4003-B 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 is widely used in AC/DC power supplies, DC power adapters, and input rectification stages of industrial control power circuits.

For engineers reviewing the 1N4003-B datasheet, 1N4003-B pinout, 1N4003-B application, or 1N4003-B equivalent, key selection considerations include its 200 V blocking rating, thermal resistance (100 K/W), junction capacitance (15 pF), operating temperature range (–65°C to +150°C), and DO-41 mechanical compatibility with legacy through-hole PCB layouts.

Technical Context

The 1N4003-B employs a diffused PN junction optimized for high surge tolerance and stable DC blocking under 60 Hz half-wave rectification. Its 1.0 V forward voltage at 1.0 A enables efficient power conversion in low-to-medium voltage supplies, while the 5.0 µA reverse leakage at 25°C ensures minimal standby loss in off-state conditions.

Designed for resistive or inductive loads, it requires 20% current derating for capacitive loads. The device operates across –65°C to +150°C, with thermal resistance of 100 K/W (junction-to-ambient) 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 the diode blocks without breakdown; defines usable AC input range in bridge or half-wave rectifiers.
I_O	1.0 A @ T_A = +75°C - Continuous DC output current capability under standard heatsinking; sets minimum trace width and thermal pad requirements.
I_FSM	30 A (8.3 ms half-sine) - Surge withstand capacity during power-up or line transients; supports robustness in unregulated AC mains inputs.
V_F	1.0 V @ I_F = 1.0 A - Forward conduction loss at rated current; directly determines power dissipation (1.0 W) and thermal design margin.
I_R	5.0 µA @ 25°C - Reverse leakage at rated DC blocking voltage; critical for low-power standby circuits and high-impedance bias networks.
C_j	15 pF @ 4.0 V, 1 MHz - Junction capacitance affecting high-frequency noise coupling and EMI filter design in switching supply front-ends.
R_θJA	100 K/W - Thermal resistance defining junction temperature rise per watt; used to calculate max ambient temperature for safe operation.

Pinout & Package

Package: DO-41 molded plastic case (UL 94V-0), axial leads with cathode band marking. Weight: ~0.30 g. Moisture sensitivity level: Level 1 per J-STD-020D.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry terminal	Connected to AC source or transformer secondary; polarity must align with circuit's forward-bias requirement.
Cathode	Forward current exit terminal	Marked by band; connects to positive rail in half-wave rectifier; determines output polarity in unregulated DC supplies.

Key Features

Feature	Design Value
Diffused junction construction	Enables uniform electric field distribution and consistent reverse breakdown behavior across production lots.
30 A surge rating (8.3 ms)	Supports reliable operation during cold-start inrush and lightning-induced line surges without degradation.
Low 5.0 µA reverse leakage	Minimizes quiescent current in battery-backed or energy-harvesting systems where standby loss is critical.
DO-41 axial package	Ensures mechanical compatibility with legacy through-hole footprints and automated insertion equipment.
RoHS-compliant bright tin plating	Guarantees solderability per MIL-STD-202 Method 208 and eliminates lead-based contamination in final assemblies.

Applications

AC/DC Wall Adapters

Industrial Control Power Supplies

Use Scenario: Rectifying 12–24 VAC transformer outputs into unregulated DC for logic rails and relay drivers.

IC Role / Device Role / Timing Role: Primary input rectifier in single-phase half-wave or full-wave bridge configurations.

Use Value: 1.0 V forward drop limits heat generation at 1 A load; 200 V rating accommodates 170 V peak from 120 VAC mains with safety margin.

Use Scenario: Converting 24 VAC control power to DC for PLC I/O modules and sensor excitation circuits.

IC Role / Device Role / Timing Role: Input-stage rectifier in DIN-rail mounted power modules with inductive load switching.

Use Value: 30 A surge rating withstands contactor coil de-energization spikes; –65°C to +150°C range supports wide ambient deployment.

LED Driver Input Stages

Legacy Embedded System Power Rails

Use Scenario: Rectifying low-voltage AC from electronic transformers feeding constant-current LED drivers.

IC Role / Device Role / Timing Role: Bridge rectifier leg in compact, cost-sensitive LED lighting power supplies.

Use Value: 15 pF junction capacitance reduces high-frequency noise coupling into sensitive current-regulation feedback paths.

Use Scenario: Providing unregulated +5 V or +12 V rails for microcontroller-based instrumentation with fixed-voltage regulators downstream.

IC Role / Device Role / Timing Role: Bulk rectifier preceding linear regulators in board-level power architecture.

Use Value: DO-41 footprint allows direct replacement in decades-old designs; RoHS compliance meets modern manufacturing requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar general-purpose rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4003-T	Same electrical specs; tape-and-reel packaging (5K/reel) vs. bulk (1K/bag).	Optimized for automated SMT placement with carrier tape; not suitable for manual prototyping or low-volume hand assembly.	Select for high-volume production requiring pick-and-place compatibility.
S1G	Same 200 V V_RRM, 1.0 A I_O, but in DO-204AL (SMA) surface-mount package; slightly lower I_FSM (30 A same, but shorter pulse spec).	Enables PCB space reduction and reflow assembly; lacks axial lead mechanical retention for high-vibration environments.	Choose when board area is constrained and vibration is not a concern.

Compared with 1N4003-T and S1G, the 1N4003-B offers optimal balance of legacy through-hole compatibility, bulk procurement flexibility, and proven reliability in serviceable power supplies-making it preferred for repair, retrofit, and low-to-mid volume industrial builds.

Availability

1N4003-B is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial control power supplies, and legacy embedded system power rails requiring stable component supply and long-term obsolescence resilience.

Supply support for 1N4003-B 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 specifically for cost-effective, robust AC-to-DC conversion in consumer, industrial, and infrastructure applications where proven performance and long-lifecycle support are essential.

FAQ

What is the maximum junction temperature for the 1N4003-B?

The 1N4003-B has a maximum junction temperature of +150°C, with an operating and storage temperature range from –65°C to +150°C. This allows use in high-ambient environments such as enclosed industrial enclosures or near heat-generating components, provided thermal design respects the 100 K/W junction-to-ambient resistance under specified mounting conditions.

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

Yes, the 1N4003-B is commonly used in discrete full-wave bridge rectifiers (four-diode configuration). Its 200 V V_RRM rating supports up to 141 V RMS input (200 V / √2), making it suitable for 120 VAC mains-derived bridges. Ensure all four diodes share matched forward voltage and thermal mounting to avoid current imbalance.

Is the 1N4003-B RoHS compliant?

Yes, the 1N4003-B features a lead-free finish and is RoHS compliant per EU Directive 2002/95/EC, with all applicable exemptions applied. Its bright tin-plated leads meet MIL-STD-202 Method 208 solderability requirements and are compatible with standard SnPb and lead-free reflow profiles.

How does the 1N4003-B differ from the 1N4007-B?

The 1N4003-B has a 200 V peak repetitive reverse voltage rating, while the 1N4007-B is rated for 1000 V. All other key parameters-including 1.0 A average forward current, 30 A surge rating, 1.0 V forward voltage, and DO-41 package-are identical. Select 1N4003-B only when 200 V blocking suffices, as higher-rated variants incur no performance benefit and may cost more.

1N4003-B Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Technology:: Standard

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

Current - Average Rectified (Io):: 1A

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

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

Reverse Recovery Time (trr):: -

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

1N4003-B FAQ

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

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

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

3.What payment methods are accepted for 1N4003-B?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4003-B?

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

Once your 1N4003-B 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-B?

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

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

All 1N4003-B 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-B meets industry standards.

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

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

Return procedure for 1N4003-B:

1.Submit a request within 90 days.

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

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