Diodes Incorporated 1N4002L-T

Overview

1N4002L-T from Diodes Incorporated is a general-purpose silicon rectifier diode in DO-41 package, rated for 100 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 modules.

For engineers reviewing the 1N4002L-T datasheet, 1N4002L-T pinout, 1N4002L-T application, or 1N4002L-T equivalent, key selection considerations include its 100 V blocking rating, thermal resistance (100 K/W), junction capacitance (15 pF), surge capability (30 A), and RoHS-compliant bright tin-plated leads - all critical for legacy power supply redesigns and cost-sensitive industrial replacements.

Technical Context

This axial-leaded rectifier operates in single-phase, half-wave configurations with resistive or inductive loads at 60 Hz. Its diffused PN junction enables stable conduction under repeated thermal cycling, while the molded plastic DO-41 case (UL 94V-0) ensures mechanical robustness and flame resistance in enclosed power enclosures.

Rated for operation from –65°C to +150°C, it delivers consistent forward characteristics (V_F ≤ 1.0 V @ I_F = 1.0 A) and minimal reverse leakage (I_R ≤ 5.0 µA @ 25°C, ≤ 50 µA @ 100°C), supporting reliable performance in ambient-temperature-variable environments such as HVAC controllers and LED driver housings.

Key Specifications

Pinout & Package

DO-41 molded plastic package with axial leads; cathode identified by a band on the body. Leads are bright tin-plated, solderable per MIL-STD-202 Method 208, and rated for moisture sensitivity Level 1 (J-STD-020D).

Key Features

Applications

Equivalent & Alternatives

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

Compared with the 1N4002L-T, the 1N4002FS offers marginally lower conduction loss, while the 1N4002-E3/54 adds automotive qualification and tighter leakage control - neither is pin-compatible in marking or tape-and-reel orientation, requiring layout or reel-handling verification.

Availability

1N4002L-T is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial motor control inputs, and LED driver power stages requiring stable component supply and long-lifecycle support.

Supply support for 1N4002L-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The 1N400x series belongs to Diodes' general-purpose rectifier product line, engineered for cost-effective, high-reliability AC-to-DC conversion in legacy and maintenance-focused power applications.

FAQ

Is the 1N4002L-T suitable for use in new designs?

No - Diodes Incorporated explicitly marks this part as "NOT RECOMMENDED FOR NEW DESIGN" in its official datasheet (DS28002 Rev. 9-3). It remains viable for repair, replacement, and legacy system continuity, but newer alternatives like the S1A-S1M series offer superior efficiency, smaller footprint, and extended temperature performance.

What does the 'L-T' suffix indicate in 1N4002L-T?

The 'L' denotes lead-free (RoHS-compliant) finish, and 'T' specifies tape-and-reel packaging: 5,000 units per 13-inch reel. This differs from the 'B' suffix (1,000 units in bulk), and both share identical electrical and thermal specifications per the datasheet.

Can the 1N4002L-T replace a 1N4001 in an existing circuit?

Yes - the 1N4002L-T has identical package, pinout, forward characteristics, and surge rating as the 1N4001, with only a higher reverse voltage rating (100 V vs. 50 V). It is a safe, functionally upward-compatible replacement where the original design margin exceeds 50 V.

How does the DO-41 package affect thermal performance in PCB layouts?

With R_θJA = 100 K/W, the DO-41 package relies on copper pour and lead length for heat dissipation. For 1 A continuous operation, minimum 25 mm² of 1 oz. copper connected to both leads reduces junction temperature rise by ~15°C versus isolated pads - verified in Diodes' thermal characterization data.