Product Overview
The Littelfuse 59143 Series Miniature Flange Mount Sensor is a two-wire, normally open reed sensor designed for a wide range of industrial, appliance, and IoT proximity sensing applications. Its compact size (23.00 mm x 14.00 mm x 6.00 mm) and non-contact switching capability make it ideal for wet and harsh environments. The sensor offers hermetic sealing (IP67 rated), UL and REACH compliance, and the ability to switch up to 265Vac/300Vdc at 10VA. It functions effectively through non-ferrous materials and is well-suited for implementing efficient proximity, access, and energy management systems. The 59143 series is designed to work with the matching 57143-000 actuator (sold separately).
Product Attributes
- Brand: Littelfuse
- Series: 59143
- Housing Material: 20% GF P.B.T
- Housing Color: White
- Sealing: Epoxy
- Agency Approvals: UL Recognized per UL 508 and CSA C22.2 No. 14, REACH compliant
- Ingress Protection: IP67 rated
- Mounting: Flange mount with M3 screw (1 Nm torque max) or adhesive mounting
- Wire Exit: Right-hand side
Technical Specifications
| Specification | Details |
|---|---|
| Sensor Dimensions (Typ.) | 3.20x3.81 mm slot (0.126x0.150 in) / 23.00 x 14.00 x 6.00 mm (0.906 x 0.551 x 0.236 in) |
| Switch Type | Normally Open |
| Contact Rating (max.) | 10 VA/Watt |
| Switching Voltage (max.) | 265 Vac / 300 Vdc |
| Breakdown Voltage (min.) | 200 Vdc / 140 Vac |
| Switching Current (max.) | 0.5 Adc / 0.35 Aac |
| Carry Current (max.) | 1.2 Adc |
| Contact Resistance (Initial, max.) | 0.2 (for 300 mm wire length) |
| Insulation Resistance (min.) | 1010 |
| Contact Capacitance (typ.) | 0.3 pF |
| Operating Temperature | -40 to +105 C |
| Operate Time (max.) | 1.0 ms |
| Release Time (max.) | 1.0 ms |
| Shock Rating (max.) | 100 G (11ms 12 sine) |
| Vibration Rating (max.) | 30 G (502000 Hz) |
| Sensitivity Options (with 57140 Actuator) | Option S: Pull-In AT Range 1218, Activation Distance 916 mm, Deactivation Distance 1017 mm Option T: Pull-In AT Range 1723, Activation Distance 715 mm, Deactivation Distance 917 mm |
| Cable Length Options | 02: 300 +/-10.00 mm (11.81 +/- 0.394 in), White 05: 1000+/-10.00 mm (39.37+/- 0.394 in), White |
| Termination Options | A: Tinned leads (6.40.76)mm |
| Actuator (sold separately) | 57143-000 |
| Part Numbering System Example | 59143-X-X-XX-X (Series-Switch Type-Sensitivity-Termination-Cable Length) |
Applications
- Security and access control
- Factory automation
- Process equipment
- Major appliances
- Small appliances
- Proximity and limit sensing
- IoT proximity sensing
2411261537_Littelfuse-59143-1-S-02-A_C20349235.pdf
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