1N4007W Rectifier Diode

Updated: 2026-09-11

Overview

The 1N4007W is a widely used silicon rectifier diode belonging to the 1N400x series. It is designed for general-purpose rectification applications, converting alternating current (AC) to direct current (DC) in power supplies, adapters, and other electronic circuits. The 'W' suffix often indicates a specific manufacturer's variant, though electrical characteristics remain consistent with the standard 1N4007. This diode is known for its robustness, handling up to 1A of average forward current and withstanding peak reverse voltages of 1000V. Its DO-41 package makes it compatible with through-hole PCB designs, and its low forward voltage drop (typically 1.1V) ensures efficient operation.

Structure and Working Principle

The 1N4007W consists of a PN junction formed in a silicon semiconductor material, encapsulated in a DO-41 package with axial leads. When forward-biased (anode positive relative to cathode), it allows current flow with minimal resistance. In reverse bias, it blocks current until the breakdown voltage (1000V) is exceeded. This unidirectional current flow is fundamental to its rectification function. In AC circuits, it effectively 'chops off' the negative half-cycle, producing pulsating DC. Multiple diodes can be configured in bridge arrangements for full-wave rectification. The silicon construction provides thermal stability and reliability across a wide temperature range (-65°C to +175°C).

Key Features

The 1N4007W stands out for its high peak reverse voltage (PRV) rating of 1000V, making it suitable for line-voltage applications (e.g., 120V/240V AC mains). Its 1A continuous forward current rating supports moderate power requirements without requiring heatsinks in most cases. Additional features include a surge current capability of 30A (non-repetitive), ensuring tolerance to brief overloads. The low leakage current (<5µA at rated PRV) minimizes power loss in blocking mode. Electrically, it shares characteristics with the entire 1N400x series, allowing substitution with lower-voltage variants (e.g., 1N4001-1N4006) when appropriate.

Application Areas

Primary applications include power supply rectification in adapters, battery chargers, and DC power modules. It's commonly found in bridge rectifiers for converting household AC to DC in appliances like radios, TVs, and LED drivers. Industrial uses include freewheeling diodes for relay coils, snubber circuits, and reverse polarity protection in automotive/embedded systems. The 1000V rating makes it suitable for voltage-doubling circuits and offline power supplies. Hobbyists frequently use it in breadboard projects due to its through-hole packaging and forgiving specifications.

Maintenance and Precautions

While durable, the 1N4007W requires proper handling to avoid performance degradation. Avoid mechanical stress on leads during PCB insertion, as the glass-sealed package can crack. In high-current applications (>500mA), ensure adequate PCB trace width or use lead-forming to elevate the body for better airflow. For reliability, operate within the -65°C to +175°C junction temperature range. When used in parallel for higher current, include small balancing resistors (0.1-0.5Ω) to account for forward voltage variations. Never exceed the absolute maximum ratings, especially in surge conditions exceeding 30A peak.

B2B Procurement Guide

When sourcing 1N4007W diodes in bulk, verify manufacturer authenticity—common brands include Vishay, ON Semiconductor, and Diodes Inc. Key specifications to confirm: 1000V PRV, 1A IF(avg), and DO-41 packaging. Lead times typically range from 2-8 weeks for large orders (10,000+ units). Consider tape-and-reel packaging for automated assembly. Pricing fluctuates with silicon wafer market conditions; as of 2023, expect $0.07-$0.15/unit for 1k quantities. For stringent applications, request datasheets with detailed thermal characteristics and reliability metrics.