59135-1-S-02-A

Proximity Reed Sensor, 23 mm, 1NO, Flange Mount, 59135 Series

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Manufacturer: LITTELFUSE
Product type: Reed Proximity Sensors
Sensing Range Max:19mm; Sensor Mounting:-; Operating Temperature Min:-40°C; Operating Temperature Max:105°C; Supply Current:500mA; Product Range:59135 Series; Breakover Voltage Min:25
Sensor Type: Reed Switch
Product Range: 59135 Series
Supply Current: 500mA
Sensor Mounting: Flange
Sensing Range Max: 23mm
Sensing Distance Max: 19mm
Operating Temperature Max: 150°C
Operating Temperature Min: -40°C

Delivery and price
Units per pack	100
Price	3.37 €
Current stock	10+
Lead time	30 days

Datasheet

Reed Sensors **Datasheet** 

**59135 High Temperature Flange Mount Sensor** Flange Mounting Sensor 

## **Description** 

The 59135 is a high temperature flange mounting reed sensor 28.57mm x 19.05mm x 6.35mm (1.125” x 0.750” x 0.250”) with a choice of normally open, normally closed or change-over contacts. The case design enables mounting with M3 screw with washer at 1 Nm torque maximum or adhesive mounting.  It is rated for operation up to 150°C and capable of switching up to 265Vac/300Vdc at 10VA. 

The 59135 series is well suited for use in a wide range of industrial, appliances, or IoT proximity sensing applications. 

**Note** : The 59135 series functions best with the matching actuator 57135-000. 

## **Features and Benefits** 

## **Additional Information** 

“e | & **Resources Accessories Samples Dimensions** Dimensions in mm (inch) 

Tolerances are +/- 0.25 (0.010) unless otherwise noted. 

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Actuator Drawing 1<br>**----- End of picture text -----**<br>


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(sold separately)<br>28.57<br>(1.125)<br>—<br>10.31 9.53<br>(.406) (.375) 19.05<br>(.75)<br>15.88 3.18x7.82<br>(.625) (.125x.308 LG.) 3.43 (.135)<br>SLOT 2<br>6.35 (.250)<br>Drawing 2<br>Sensor<br>28.57<br>(1.125) 6.35<br>(.250)<br>Pa<br>9.53<br>3.18x7.82 (.125x.308 LG.) (.562)14.28 (.375) 19.05(.75)<br>SLOT 2 oo<br>3.96x8.71 (.156x.343 LG.)<br>= |<br>o 15.88 y 6.35 (.250) + 5 (.135)3.43<br>(.625)<br>Table 1<br>Schematics Switch Type<br>RedRed 1 and 2<br>— Red<br>BlueWhite 3<br>RedRed 4<br>**----- End of picture text -----**<br>


- Non-contact switching ■ No leakage current in ‘open’ solution for wet & harsh state−ideal for battery environments powered IoT applications 

- ■ Rated up to 150C operating ■ Can operate through temperature non-ferrous materials (for 

- ■ Housing design for optimum example, wood, plastic or adjustability aluminium) 

- Available in select ■ Helps implement efficient sensitivities (operating proximity/access and energy distances) management systems 

- Standard Teflon insulated ■ Compact size and easy cable configurations; installation and effective customization options concealment in many available applications 

- ■ Thermoset overmold material ■ UL Recognized per UL 508 and CSA C22.2 No. 14. 

- Hermetically sealed, IP67 rated; UL and REACH compliant 

## **Applications** 

- Security and access control ■ Major appliances 

- ■ Factory automation ■ Small appliances ■ Process equipment ■ Proximity and limit sensing **Table 2** 

- **Agency Approvals** 

- **Agency Agency File Number** E61760 

- ~~clus~~ 

- **Note:** Contact Littelfuse for specific agency approval ratings. 

© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 04/04/22 

**1** 

Reed Sensors **Datasheet** 

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**59135 High Temperature Flange Mount Sensor** Flange Mounting Sensor 

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## **Table 3** 

## **Electrical Ratings** 

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Normally Open<br>Contact Type Normally Open Change Over Normally Closed<br>High Voltage<br>Switch Type 1 2 3 4<br>Contact Rating  [1] VA/Watt - max. 10 10 5 5<br>Switching  [2] Vdc - max. 200 300 175 175<br>Voltage  [4] Vac - max. 140 265 120 120<br>Breakdown  [3] Vdc - min. 250 400 200 200<br>Switching  [2] Adc - max. 0.5 0.4 0.25 0.25<br>Current  [4] Aac - max. 0.35 0.30 0.18 0.18<br>Carry Adc - max. 1.2 1.4 1.5 1.5<br>Contact, Initial  Ω - max. 0.2 0.2 0.2 0.2<br>Resistance  [5]<br>Insulation Ω - min. 10 [10] 10 [10] 10 [9] 10 [9]<br>Capacitance Contact pF - typ. 0.3 0.2 0.3 0.3<br>Temperature Operating °C -40 to +150 -20 to +150 -40 to +150 -40 to +150<br>Table 4<br>Product Characteristics<br>Operate Time  [6] ms - max. 1.0 1.0 3.0 3.0<br>Release Time  [6] ms - max. 1.0 1.0 3.0 3.0<br>Shock  [7] 11ms 1⁄2 sine G - max. 100 100 50 50<br>Vibration  [7] 50-2000 Hz G - max. 30 30 30 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. Breakdown Voltage - per MIL-STD-202, Method 301. 

4. Electrical Load Life Expectancy - Contact Littelfuse with voltage, current values along with type of load. 

5. This resistance value is for 300 mm wire length. Resistance changes when wire lengthens. 

6. Operate (including bounce)/Release Time - per EIA/NARM RS-421-A, diode suppressed coil (Coil II). 

7. Shock and Vibration - per EIA/NARM RS-421-A and MIL-STD-202. 

8. For custom modifications to the wire length or size, or adding a special connector, please contact Littelfuse. 

## **Table 5** 

## **Sensitivity Options (Using 57135 Actuator)** 

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Select Option S T U V<br>Pull-In  Activation  Pull-In  Activation  Pull-In  Activation  Pull-In  Activation<br>Deactivation  Deactivation  Deactivation  Deactivation<br>Switch Type AT  Distance  AT  Distance  AT  Distance  AT  Distance<br>Distance (mm) Distance (mm) Distance (mm) Distance (mm)<br>Range (mm) Range (mm) Range (mm) Range (mm)<br>1 Normally Open 12-18 11-23 13-25 17-23 10-22 12-24 22-28 8-20 10-22 27-33 6-18 9-21<br>2 High Voltage - - - 17-23 8-20 11-23 22-28 7-19 11-23 27-33 6-18 10-22<br>3 Change Over 15-20 9-21 11-23 20-25 6-18 9-21 25-30 5-17 8-20 - - -<br>4 Normally Closed 15-20 9-21 11-23 20-25 6-18 9-21 25-30 5-17 8-20 - - -<br>**----- End of picture text -----**<br>


## **Notes:** 

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D<br>Actuator Sensor<br>**----- End of picture text -----**<br>


1. Pull-In AT Range: These AT values are the bare reed switch AT before modification. 

2. The activation distance is average value on the final sensor assembly. 

© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 04/04/22 

**2** 

Reed Sensors **Datasheet** 

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**59135 High Temperature Flange Mount Sensor** Flange Mounting Sensor 

## **Part Numbering System** 

## **Table 6 Cable Length Specification** 

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Sensor: 59135- X - X - XX - X<br>Series<br>Switch Type<br>  1, 2, 3, or 4<br>Sensitivity<br>S, T, U, or V<br>Cable Length<br> 02, 05<br>Termination<br>A<br>Actuator: 57135 - 000<br>Series<br>Standard Actuator<br>000<br>**----- End of picture text -----**<br>


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Cable Type: 20 AWG 19/32 FEP UL1130/UL1332<br>Cable Length<br>Select Option<br>mm (inch)<br>02 300 +/-10.00 (11.81 +/- 0.394)<br>05 1000+/-10.00 (39.37+/- 0.394)<br>**----- End of picture text -----**<br>


## **Table 7** 

## **Termination Specification** 

**Termination Options Select Description Option (Two-wire versions illustrated)** A Tinned leads (6.4±0.76)mm 

## **Table 8** 

## **Material Specification** 

||**Housing Material**|**Color**|**Sealing**<br>**Component**|
|---|---|---|---|
|57135 Actuator|Thermoset Epoxy|Black|Epoxy|
|59135 Sensor|Thermoset Epoxy|Black|Epoxy|



## **Table 9** 

## **Packaging** 

|**Cable Length**|**Packaging Option**|**Quantity**|
|---|---|---|
|02|Bulk|500|
|05|Bulk|500|



**Note:** The 57135 Actuator is sold separately. 

**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/disclaimier-electronics. 

© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 04/04/22 

**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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