littelfuse.com© 2019 Littelfuse Revised: 02/08/19
Specifications are subject to change without notice.
Reed Sensors
Flange Mounting Sensor > 59145
D
Sensor
Actuator
59145 Flange Mount Sensor + 57145 Actuator
Electrical Ratings
Contact Type Normally
Open Normally Open
High Voltage Change
Over Normally
Closed
Switch Type 1 2 3 4
Contact Rating 1VA/Watt - max. 10 10 5 5
Voltage 4Switching 2
Breakdown 3
Vdc - max.
Vac - max.
Vdc - min.
200
140
250
300
265
400
175
120
200
175
120
200
Current 4Switching 2
Carry
Adc - max.
Aac - max.
Adc - max.
0.5
0.35
1.2
0.4
0.30
1.4
0.25
0.18
1.5
0.25
0.18
1.5
Resistance 5Contact, Initial
Insulation Ω - max.
Ω - min. 0.2
1010 0.2
1010 0.2
1090.2
109
Capacitance Contact pF - typ. 0.3 0.2 0.3 0.3
Temperature Operating °C -40 to +105 -20 to +105 -40 to +105 -40 to +105
Product Characteristics
Operate Time 6ms - max. 1.0 1.0 3.0 3.0
Release Time 6ms - max. 1.0 1.0 3.0 3.0
Shock 711ms ½ sine G - max. 100 100 50 50
Vibration 750-2000 Hz G - max. 30 30 30 30
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 11.81mm 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.
Sensitivity Options (Using 57145 Actuator)
Select Option S T U V
Switch Type
Pull-In
AT Range
Activate Distance – D
mm (inch)
Average
Pull-In
AT Range
Activate Distance – D
mm (inch)
Average
Pull-In
AT Range
Activate Distance – D
mm (inch)
Average
Pull-In
AT Range
Activate Distance – D
mm (inch)
Average
1Normally Open 12-18 13.5 (.531) 17-23 11.2 (.441) 22-28 9.8 (.385) 27-33 9.0 (.357)
2High Voltage -- -- 17-23 11.2 (.441) 22-28 9.8 (.385) 27-33 9.0 (.357)
3Change Over 15-20 11.0 (.433) 20-25 9.2 (.362) 25-30 8.5 (.335) -- --
4Normally
Closed 15-20 11.0 (.433) 20-25 9.2 (.362) 25-30 8.5 (.335) -- --
Note:
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.