Features
Normally Open contact.
Two sensitivity bands.
Molded with internal blades parallel to SMD feet.
Packed in Tapes for automatic assembly.
📝 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.
⚡️ Electrical
| Parameters | Unit | Values |
| 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) | VDC | 100 |
| Breakdown Voltage (min) | VDC | 150 |
| Contact Resistance (max) | mΩ | 200 |
| Insulation Resistance (min) | Ω | 109 |
| Capacitance (typ) | pF | 0.2 |
📊 Miscellaneous
| Parameters | Unit | Values |
| 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.
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🛠️ Usage Notes
Here are some of the recommended usage notes to ensure maximum durability of this product. The complete usage notes are available here.
🧰 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.
