R4 Ultra Miniature SMD Reed Sensor

R4-S SMD Reed Sensor
R4-S Reed Sensor PCB Layout drawing
R4-F SMD Reed Sensor
R4-F Reed Sensor PCB Layout drawing
R4 Reed Sensor Packing Tape

Features

Normally Open contact. Two sensitivity bands. Molded with internal blades parallel to SMD feet. Packed in Tapes for automatic assembly.

Benefits

Omni-polar. Does not require power for operation. Ruthenium Sputtered Contact. RoHS Compliant. Not ESD Sensitive.

📝Description

The R4 ultra miniature SMD reed sensors are specially engineered for precise signal switching applications, offering a significant size advantage over standard SMD reed sensors. Their design includes molded flattened leads, which effectively prevent shock transfer during the SMD formation process. This feature ensures the integrity and longevity of the device.

These sensors support various activating distances depending on the type of magnet and the AT band employed. Each unit undergoes rigorous testing to ensure quality, including Operate AT, Release AT, Static Contact Resistance, and Variable Contact Resistance tests, all conducted to 100% accuracy before the sensors are packed for distribution.

The R4 Ultra miniature reed sensor operates as an omni-polar device, meaning it can be activated by either a north pole or a south pole magnet, or even both simultaneously. To optimize its performance, selecting the appropriate AT band, magnet strength, and operating axis is crucial, as this combination determines the precise number of operates and releases achievable from the sensor.

For easy reference, all dimensions provided are in millimeters (mm), ensuring compatibility with various design specifications and applications. Whether used in consumer electronics, automotive systems, or industrial controls, the R4 ultra miniature reed sensor’s compact size and versatile functionality make it an ideal choice for applications where space and reliability are paramount.

Actuation Distances for R4 Ultra Miniature Reed Sensors

Operate and release distances for the R4 ultra-miniature reed sensor in the two lead formations and two standard AT bands when actuated Continue reading ->

Sep 3, 2024

Magnets for Actuating Reed Switches and Reed Sensors

Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized Continue reading ->

Sep 3, 2024

⚡️Electrical

Contact Form		A
Contact Rating (max)	W/VA	10.0
Switching Current (max)	A	0.5
Carry Current (max)	A	0.5
DC Switching Voltage (max)	V_DC	100
Breakdown Voltage (min)	V_DC	150
Contact Resistance (max)	mΩ	200
Insulation Resistance (min)	Ω	10⁹
Capacitance (typ)	pF	0.2

📊Miscellaneous

Operate Time (max)	ms	0.35
Bounce Time (max)	ms	0.30
Release Time (max)	ms	0.10
Resonance Frequency (typ)	Hz	<2000
Operating Frequency (max)	Hz	500
Operating Temperature Range	°C	-40 to +140
Shock Resistance (½Sin wave for 11ms)	G	30
Vibration Resistance (10-2000 Hz)	G	20

⚙️Ordering Code

R4-(Formation Code)-(Operate Band Code)

Formation Code	Lead Type
S	Gull-wing SMD
F	Low Profile SMD

Operate Band Code
1	AT	10-15
2	AT	15-20

Examples: R4-S-1 denotes R4 Reed Sensor with Gull-wing SMD formed leads in 10-15 Operate band (AT). R4-F-2 denotes R4 Reed Sensor with Low Profile SMD formed leads, in 15-20 Operate Band (AT).

Other Special Configurations: Lower Static Contact Resistance, Dynamic Contact Resistance Limit, Higher Insulation Resistance, Special Release Limits, Gold plated leads.

🛠️Usage Notes

Here are some of the recommended usage notes to ensure maximum durability of this product. The complete usage notes are available here.

Ampere Turn Selection for your Application

Selecting the appropriate Ampere Turn (AT) or magnetic sensitivity for a Reed Switch, Reed Sensor, or Magnet Sensor is crucial in any Continue reading ->

Jul 24, 2024

Handling of Reed Switches

Handling of Reed Switches Reed Switches, Reed Sensors, and Magnet Sensors are delicate devices prone to developing micro cracks in Continue reading ->

Jun 17, 2024

Reflow Soldering of Reed Switches

Reflow Soldering is a sophisticated process used in electronics manufacturing to solder components onto printed circuit boards (PCBs). It Continue reading ->

Jun 17, 2024

Soldering of Reed Switches

Soldering Reed Switches and Reed Sensors requires meticulous handling to safeguard these delicate components against inadvertent damage. Continue reading ->

Jun 17, 2024

Ferro-magnetic Parts

Reed Switches utilize a nickel-iron alloy, sputter coated with additional Ruthenium to render it ferromagnetic while maintaining low Continue reading ->

Jun 17, 2024

Protection Circuits for Reed Switches

It is assumed that the ideal reed switch load is a Resistive Load, but it is almost impossible to reduce any load to purely resistive. Continue reading ->

Jun 17, 2024

🧰Applications

Although we can never restrict the use of a reed sensor to a particular field, the following is a list of some of the applications that the R4 ultra miniature Reed Sensor is known to perform well.