Product Overview
The Littelfuse 59143 Series Miniature Flange Mount Sensor is a two-wire, normally open reed sensor designed for proximity sensing in industrial, appliance, and IoT applications. Its compact size (23.00 mm x 14.00 mm x 6.00 mm) and flange mount design allow for easy installation with M3 screws or adhesive mounting. The hermetically sealed, IP67-rated housing makes it suitable for wet and harsh environments, offering non-contact switching with no leakage current in the 'open' state, ideal for battery-powered IoT devices. It can switch up to 265Vac/300Vdc at 10VA and operate through non-ferrous materials. The sensor is UL Recognized per UL 508 and CSA C22.2 No. 14. It functions best 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 (E61760), CSA C22.2 No. 14
- Certifications: REACH compliant
- Ingress Protection: IP67 rated
- Actuator Compatibility: 57143-000 (sold separately)
- Actuator Material: 20% GF P.B.T
- Actuator Color: White
- Actuator Sealing: Epoxy
Technical Specifications
| Specification | Value | Notes |
|---|---|---|
| Dimensions (Sensor) | 23.00 x 14.00 x 6.00 mm (0.906 x 0.551 x 0.236) | (Excluding Encapsulant) |
| Switch Type | Normally Open | |
| Contact Rating (max.) | 10 VA/Watt | Product of switching voltage and current should not exceed wattage rating. |
| Switching Voltage (max.) | 265 Vac / 300 Vdc | |
| 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 | Including bounce. |
| Release Time (max.) | 1.0 ms | |
| Shock Rating (max.) | 100 G | 11ms sine. |
| Vibration Rating (max.) | 30 G | 502000 Hz. |
| Mounting Torque (max.) | 1 Nm | For M3 screw with washer. |
| Cable Type | 24 AWG 7/32 PVC 105C UL1430/UL1569 | |
| Cable Length Option 02 | 300 mm (11.81 inches) | +/-10.00 mm tolerance. Cable Color: White. |
| Cable Length Option 05 | 1000 mm (39.37 inches) | +/-10.00 mm tolerance. Cable Color: White. |
| Termination Option A | Tinned leads (6.40.76)mm | |
| Sensitivity Option S (Switch Type 1) | Pull-In AT Range: 1218 AT, Activation Distance: 916 mm, Deactivation Distance: 1017 mm | Using 57140 Actuator. |
| Sensitivity Option T (Switch Type 1) | Pull-In AT Range: 1723 AT, Activation Distance: 715 mm, Deactivation Distance: 917 mm | Using 57140 Actuator. |
| Part Numbering System - Series | 59143 | |
| Part Numbering System - Switch Type | 1 | (Normally Open) |
| Part Numbering System - Sensitivity | S, T | |
| Part Numbering System - Termination | A | |
| Part Numbering System - Cable Length | 02, 05 | |
| Actuator Part Number | 57143-000 | Standard Actuator |
2411261537_Littelfuse-59143-1-T-02-A_C20349236.pdf
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