littelfuse.com

© 2015 Littelfuse

Revised: 11/02/15

Specifications are subject to change without notice.

59040 Press-Fit Firecracker Reed Sensor + 57040 Actuator

Description

The 59040 Press-Fit Firecracker Reed Sensor is a small, cylindrical reed sensor

31.0mm (L) x 10.7mm (Dia.) (1.22” x 0.420”) with a choice of normally open,

normally closed or change-over contacts. It is capable of switching up to 300Vdc

at 10W and available with a range of sensitivity, cable length and connector

options. It is well suited for position and limit sensing, security, level sensing and

linear actuator applications. It functions best with the 57040 actuator.

Reed Sensors

Features

• Magnetically-operated proximity

sensor

• Cylindrical capsule with retaining

ribs

• Operates through non-ferrous

materials such as wood, plastic or

aluminum

• Hermetically sealed contacts

• Options of normally open, normally

closed or single-pole-double-throw

• Customer-defined sensitivity

• Custom cable length and connector

options available

Benefits

• Ribs on capsule compress when

inserted into a mounting hole and

provide retaining force, allowing

simple and secure press-fit

installation

• Quick and easy press-fit installation

that requires no screws, brackets,

nor glue.

• Well suited for usage in high-

moisture and contaminated

environments

• Non-contact solution, aesthetically

more appealing than push-button or

lever mechanical-type switches

• Ideal for battery-powered

applications as the contacts do not

draw power when in the non-

activated state

• Reed contacts last for millions of

operating cycles under micro-

controller voltage and current logic-

level loads

Applications

• Position and limit sensing

• Security

• Level sensing

• Linear actuators

Dimensions

Dimensions in mm (inch)

Sensor

Actuator

Firecracker > 59040

Note: The 57040 Actuator is sold separately.

Notes:

1. The 59040 Sensor and 57040 Actuator are designed to fit into a drill size hole of 9.5mm

(0.374") diameter.

2. Not recommended to be mounted within ferrous metal materials, these activate distance

will decrease significantly.

8.46±0.25

(.333±.01)

Actuator

Sensor

10.70 ±0.25

(.42±.01)

10.70 ±0.25

(.42 ±.01)

31.00±0.25

(1.22±.01)

300

(11.81)

8.46±0.25

(.333±.01)

31.00±0.25

(1.22±.01)