Product Overview
The Littelfuse 59140 is a miniature flange mount reed sensor designed for position and limit sensing applications. Occupying minimal board space (3.22cm), it offers a choice of contact types including normally open, normally open high voltage, normally closed, and changeover. Its robust case design allows for screw or adhesive mounting, and it is capable of switching up to 265Vac/300Vdc at 10VA. The sensor functions best with the matching 57140 actuator. Key benefits include hermetically sealed contacts that resist contamination, no standby power requirement, and the ability to operate through non-ferrous materials. It is ideal for security systems, linear actuators, and door switches.
Product Attributes
- Brand: Littelfuse
- Series: 59140 (Sensor), 57140 (Actuator)
- Certifications: E61760 (Reed Sensors)
Technical Specifications
| Specification | Details |
|---|---|
| Sensor Model | 59140 |
| Actuator Model | 57140-000 |
| Mounting Type | Flange Mount |
| Board Space Occupied | 3.22cm (0.500) |
| Contact Types Available | Normally Open, Normally Open High Voltage, Normally Closed, Changeover |
| Maximum Switching Voltage | 265Vac / 300Vdc |
| Maximum Switching Power | 10VA |
| Wire Exit Options | Top right hand side (standard), Left hand exit (59141 Series) |
| Operating Temperature Range | -40 to +105 C (Standard), -20 to +105 C (Normally Open High Voltage) |
| Shock Rating | 100 G max. (11ms sine) for NO, NO HV, Change Over; 50 G max. (11ms sine) for NC |
| Vibration Rating | 30 G max. (50-2000 Hz) |
| Cable Length (Standard) | 300 10mm (11.81 0.394 inches) |
| Cable Type (Standard) | 24 AWG 7/32 PVC 105C UL1430/UL1569 |
| Termination Options | Tinned leads (6.40.76)mm, Untinned leads (6.40.76)mm, JST type XHP 2.5mm pitch |
| Contact Rating (max.) | 10 VA/Watt (NO, NO HV); 5 VA/Watt (Change Over, NC) |
| Switching Current (max.) | 0.5 Adc / 0.40 Aac (NO); 0.35 Adc / 0.30 Aac (NO HV); 0.25 Adc / 0.25 Aac (Change Over, NC) |
| Carry Current (max.) | 1.2 Adc (NO); 1.4 Adc (NO HV); 1.5 Adc (Change Over, NC) |
| Contact Resistance (Initial max.) | 0.2 |
| Insulation Resistance (min.) | 1010 (NO, NO HV, NC); 109 (Change Over) |
| Contact Capacitance (typ.) | 0.3 pF (NO, Change Over, NC); 0.2 pF (NO HV) |
| Operate Time (max.) | 1.0 ms (NO, NO HV); 3.0 ms (Change Over, NC) |
| Release Time (max.) | 1.0 ms (NO, NO HV); 3.0 ms (Change Over, NC) |
| Sensitivity Options (Pull-In AT Range) | S (12-18 AT), T (17-23 AT), U (22-28 AT), V (27-33 AT) |
| Activate Distance (Average) | See table in source document for specific options (e.g., 10.4 mm for Option S, Switch Type 1) |
| Packaging Options | Bulk (500 quantity) |
| Part Numbering System | 59140 - [Switch Type] - [Sensitivity] - [Termination] - [Cable Length] |
2504101957_Littelfuse-59140-010_C142941.pdf
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