59166-1-U-00-D
Reed Switch, SPST-NO, 5.1 mm, SMD, -40°C to 125°C, 59166 Series
- Manufacturer: LITTELFUSE
- Product type: Reed Proximity Sensors
- SVHC: To Be Advised
- Sensor Type: Reed
- Product Range: 59166 Series
- Supply Current: -
- Sensor Mounting: SMD
- Sensing Range Max: 5.1mm
- Sensing Distance Max: 5.1mm
- Operating Temperature Max: 125°C
- Operating Temperature Min: -40°C
| Delivery and price | |
|---|---|
| Units per pack | 100 |
| Price | 0.597 € |
| Current stock | 1000+ |
| Lead time | 30 days |
Reed Switches **Datasheet**
**59166 Series** Miniature Overmolded Reed Switch
## **Description**
The 59166 is a miniature overmolded reed switch 16.00mm x 2.40mm x 2.40mm (0.630” x 0.094” x 0.094”) with Gull Wing leads. It has normally open contact, capable of switching up to 200Vdc at 10W. **Note:** The 57045 Actuator is sold separately.
## **Features & Benefits**
- Suitable for pick and place
- Two-part magnetically operated proximity switch
- No standby power requirement
- Gull Wing Leads
- Operates through non-ferrous materials such as wood, plastic or aluminium
- Tape and reel option
- Solder reflow capable
- Thermoset overmolded material
- material ■ Hermetically sealed,
- **Additional Information** magnetically operated ■ RoHS Compliant contacts continue to operate
- ■ ATEX certified for use long after optical and other in European explosive technologies fail due to atmospheres: II 3 G Ex contamination nC IIC Gc
- “eo Bo: ■ Certified for use in North American Hazardous
- **Resources Accessories Samples** Locations: Class I, Division 2 and Zone 2
- **Agency Approvals**
## **Additional Information**
## **Applications**
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Agency Agency File Number<br>E61760<br>E471070<br>DEMKO 14 ATEX 1393U<br> II 3 G Ex nC IIC Gc<br>€) &<br>**----- End of picture text -----**<br>
- Position and Limit Sensing ■ Automotive Electronics
- Security System Switch
- Anti-Tamper Detection
- Door and Window Proximity ■ Small Appliances Sensing
**Note:** Contact Littelfuse for specific agency approval ratings.
- Metering
**Dimensions** Dimensions in mm (inch)
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2x 0.89<br>(0.035)<br>2x 0.89<br>16.00 MAX. (0.035)<br>e (0.630) w =<br>2.51<br>=! (0.099) @t<br>(0.768)19.51 Po (0.094)2.40 S 2.51 e<br>(0.099)<br>**----- End of picture text -----**<br>
**Soldering Footprint** Dimensions in mm (inch)
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2.00<br>1.50 (0.079)<br>(0.059)<br>20.20<br>o=<br>(0.795)<br>**----- End of picture text -----**<br>
© 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 05/23/23
**1**
Reed Switches **Datasheet**
**59166 Series** Miniature Overmolded Reed Switch
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## **Electrical Ratings**
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Contact Type Normally Open<br>Switch Type 1<br>Contact Rating [1] VA/Watt - max. 10<br>Switching [2] Vdc - max. 200<br>Voltage [3] Vac - max. 140<br>Breakdown [4] Vdc - min. 250<br>Switching [2] Adc - max. 0.5<br>Current [3] Aac - max. 0.35<br>Carry Adc - max. 0.8<br>Contact, Initial Ω - max. 0.2<br>Resistance<br>Insulation Ω - min. 10 [10]<br>Capacitance Contact pF - typ. 0.3<br>Temperature Operating °C -40 to +125<br>Product Characteristics<br>Operate Time [5] ms - max. 1.0<br>Release Time [5] ms - max. 1.0<br>Shock [6] 11ms 1⁄2 sine G - max. 100<br>Vibration [6] 50-2000 Hz G - max. 30<br>**----- End of picture text -----**<br>
## **Notes:**
1. Contact rating - Product of the switching voltage and current should never exceed the wattage rating. Contact Littelfuse for additional load/life information.
2. When switching inductive and/or capacitive loads, the effects of transient voltages and/or currents should be considered. Refer to Application Notes AN108A and AN107 for details.
3. Electrical Load Life Expectancy - Contact Littelfuse with voltage, current values along with type of load.
4. Breakdown Voltage - per MIL-STD-202, Method 301.
5. Operate (including bounce)/Release Time - per EIA/NARM RS-421-A, diode suppressed coil (Coil II).
6. Shock and Vibration - per EIA/NARM RS-421-A and MIL-STD-202.
## **Sensitivity Options (Using 57045 Actuator)**
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Select Option S T U<br>Activate Distance, D Activate Distance, D Activate Distance, D<br>Pull-In AT Pull-In AT Pull-In AT<br>Switch Type mm (inch) mm (inch) mm (inch)<br>Range Range Range<br>Average Average Average<br>1 Normally Open 10-15 7.4 (.292) 15-20 6.1 (.240) 20-25 5.1 (.201)<br>**----- End of picture text -----**<br>
**Note:**
1. Pull-In AT Range: These AT values are the before molding and modification AT of the 59166.
2. The activation distance is average value post modification for the Gull wing option C or D.
## **Termination Specification**
|**Termination Options**|**Termination Options**|
|---|---|
|**Select Option**|**Description**|
|C|Gull Wing bulk packed|
|D|Gull Wing tape and reel|
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Switch Actuator<br>D<br>**----- End of picture text -----**<br>
© 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 05/23/23
**2**
Reed Switches **Datasheet**
**59166 Series** Miniature Overmolded Reed Switch
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Part Numbering System<br>**----- End of picture text -----**<br>
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Switch: 59166 - 1 - X - 00 - X Actuator: 57045 - 000<br>Series Series<br>Switch Type Standard Actuator<br>000<br>Sensitivity Note: The 57045 Actuator is sold separately.<br>S, T, or U<br>Termination and<br>Packaging<br>C, or D<br>Product Marking<br>59166-1-X-00-X XXXX<br>Part Number<br>Date Code<br>(YYWW)<br>**----- End of picture text -----**<br>
|**Packaging**|**Packaging**|**Packaging**|**Packaging**|**Packaging**|
|---|---|---|---|---|
|**Packaging Option**|**Packaging Specification**|**Quantity**|**Quantity and Packaging Code**|**Taping Width**|
|Bulk|Bulk|1500|B|N/A|
|Tape and Reel|EIA-RS-481-1|1500|R|32.00/(1.260)|
**Disclaimer Notice** - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 05/23/23
**3**
Updated at April 27, 2026
Founded in 1927 and headquartered in Chicago, Illinois, Littelfuse is a premier global manufacturer of circuit protection, power control, and sensing technologies. Widely recognized for pioneering the first small, fast-acting protective fuse, the company has grown into an industry leader whose highly reliable components are essential to modern industrial, transportation, and consumer electronics applications worldwide. At the core of the Littelfuse portfolio is an expansive and industry-leading range of circuit protection solutions. This encompasses a massive selection of traditional fuses, fuse holders, and resettable PTC thermistor fuses designed to safely interrupt overcurrent conditions. To defend against electrical overstress, Littelfuse also provides advanced transient voltage suppression (TVS) technologies, including thousands of specialized TVS diodes, TVS varistors, and gas discharge tubes (GDTs) that ensure robust defense against voltage spikes and environmental hazards. Beyond its foundational protection components, Littelfuse manufactures a diverse array of discrete semiconductors, sensors, and switching devices. Engineers rely on their high-performance thyristors, including TRIACs and SCRs, alongside power-efficient Schottky diodes and MOSFETs for demanding power control applications. Complemented by precision proximity sensors and highly reliable reed and solid-state relays, Littelfuse delivers the critical building blocks required for secure, efficient, and complete system design.
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