Choosing the right reed relay is crucial for ensuring the reliability and longevity of your electronic circuits. These compact, electromechanical switches are vital components in a wide array of applications, from test and measurement equipment to telecommunications systems. Understanding their specific characteristics and how they align with your project's demands can prevent costly failures and optimize performance.
- SPECIFICATIONS: 5V DC reed relay switch module with 450-550 ohm DC resistance, rated for 1A current, featuring normally open (NO) contact configuration
- PACKAGE CONTENTS: Set of 5 black SIP-1A05 relay switches, each with 4-pin configuration for versatile circuit integration
- COMPACT DESIGN: Space-efficient SIP (Single In-line Package) form factor makes these relays ideal for PCB mounting and electronic assemblies
- SWITCHING CAPABILITY: Reliable switching performance with normally open contacts, perfect for low-power signal switching applications
- INSTALLATION: Standard 4-pin configuration enables straightforward integration into existing circuits and control systems
- Model: SIP-1A05
- Origin: Chinese Mainland
- Power supply mode: DC 5V
- DC resistance: 450~550ohm
- Voltage: ≤ 36V
- ✪Length of glass: 14 mm；Diameter of glass: 2 mm
- ✪Maximum contact resistance: 100M；Minimum Insulation Resistance: 1010
- ✪Package included:6 X Reed Switch+6 X Magnetic chip
- Suitable for industrial control equipment circuits for controlling electromagnetic starters, contactors, relays and other circuits (there are only boxes in here, button switches are not included). Good for electronic projects, power supply units...
- Dimension:65mm*65mm*75mm
- ✪Package included:10 X 3 Pin Reed Switch
- ✪Length of glass: 14 mm；Diameter of glass: 2.5 mm; Total length: 52 mm
- ✪ Max. Contact Rating: 4W, Maximum switching voltage 60VDC/VAC,Working temperature: -20 degrees to 80 degrees
- ✪Max. Switch Current: 0.25A；Maximum load current: 0.5A
- ✪Maximum contact resistance: 115M；Minimum Insulation Resistance: 2x107/2x109
- Package Dimensions: 1.01 L x 0.39 H x 0.38 W (inches)
- Package Weight : 0.5 pounds
- Country of Origin : Taiwan, Province Of China
- Part number: BR-1050-VP
- ✪Package included: 10pcs 3 Pin Reed Switch+10pcs Magnet Piece
- ✪Diameter of glass: 2.5 mm; Length of glass: 14 mm; Total length: 52 mm.
- ✪ Max. Contact Rating: 4W, Maximum switching voltage 60VDC/VAC.Working temperature: -20 degrees to 80 degrees.
- ✪Maximum load current: 0.5A. Max. Switch Current: 0.25A
- ✪Minimum Insulation Resistance: 2x107/2x109 Maximum contact resistance: 115M
- Control voltage: 3-32VDC
- Contact form: SPST
- Size: 1.4"L x 0.3"W x 0.9"H
- Terminal type: Solder lead
- Reed Relays
- Application: Automotive
- Model: Relay Product Series: Others
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Last update on 2026-07-15 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Reed Relays
Understanding Contact Configuration and Switching Capabilities
Reed relays come in various contact forms, with the most common being Form A (normally open, SPST-NO) and Form C (single-pole double-throw, SPDT). Form A is ideal for simple on/off switching, while Form C offers more complex switching options. Consider the maximum voltage and current your application requires. Exceeding these limits can damage the relay or shorten its lifespan. Always select a relay with ratings comfortably above your expected peak loads to ensure robust operation and a safety margin.
Coil Voltage and Drive Requirements
The coil voltage is the voltage required to energize the relay's coil and close its contacts. Common coil voltages include 5V, 12V, and 24V DC. It's essential to match the relay's coil voltage to the control voltage available in your circuit. Also, consider the coil resistance and current draw. A lower coil resistance means higher current draw for a given voltage, which impacts the power supply requirements and the drive circuit design. Some relays include internal diodes for coil suppression, which is crucial for protecting driving transistors or microcontrollers from back-EMF spikes.
Package Type and Environmental Considerations
Reed relays are available in various package types, including through-hole (DIP, SIP) and surface-mount (SMD) designs. Your PCB layout and assembly method will dictate the appropriate package. Environmental factors like operating temperature range, shock, and vibration resistance are also important. For harsh environments, look for hermetically sealed or potted relays that offer enhanced protection against moisture and contaminants. Understanding the expected operating conditions will help in selecting a relay that can withstand the environment over its intended lifespan.
Key Performance Metrics and Longevity
Several performance metrics are critical when evaluating reed relays. Contact resistance, typically measured in milliohms, indicates the resistance across the closed contacts and affects power dissipation and signal integrity. A lower contact resistance is generally preferred, especially for low-level signal switching. Insulation resistance, measured in gigohms, indicates the resistance between the contacts and the coil, as well as between open contacts, ensuring proper isolation. The expected mechanical and electrical life cycles, often specified in millions or billions of operations, are crucial for applications requiring high reliability and longevity. Choose a relay with a life expectancy that significantly exceeds your application's projected usage.