Specifications are subject to change without notice.
littelfuse.com
Reed Sensors
Flange Mounting Sensor > 59140
59140 Miniature Flange Mount Sensor + 57140 Actuator
Electrical Ratings
Contact Type
Switch Type
Contact Rating
Voltage
4
1
Normally
Open
1
VA/Watt - max.
Switching
2
Normally Open
High Voltage
2
10
300
265
400
.40
0.30
1.4
0.2
10
10
0.2
-20 to +105
Change
Over
3
5
175
120
200
0.25
0.18
1.5
0.2
10
9
0.3
-40 to +105
Normally
Closed
4
5
175
120
200
0.25
0.18
1.5
0.2
10
9
0.3
-40 to +105
10
200
140
250
0.5
0.35
1.2
0.2
10
10
0.3
-40 to +105
Breakdown
4
3
Vdc - max.
Vac - max.
Vdc - min.
Adc - max.
Aac - max.
Adc - max.
Ω - max.
Ω - min.
pF - typ.
°C
Current
Switching
Carry
5
2
Resistance
Contact, Initial
Insulation
Contact
Operating
Capacitance
Temperature
Product Characteristics
Operate Time
Release Time
Shock
7
7
6
6
ms - max.
ms - max.
11ms 1⁄2 sine
50-2000 Hz
G - max.
G - max.
1.0
1.0
100
30
1.0
1.0
100
30
3.0
3.0
50
30
3.0
3.0
50
30
Vibration
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 57140 Actuator)
Select Option
Switch Type
S
T
Pull-In AT
Range
U
Activate Distance
mm (inch)
Average
Pull-In AT
Range
V
Activate Distance
mm (inch)
Average
Distance Pull-In AT Activate Distance
Pull-In AT Activate (inch)
mm
mm (inch)
Range
Range
Average
Average
1
2
3
4
Normally Open
High Voltage
Change Over
Normally Closed
12-18
--
15-20
15-20
10.4 (.410)
--
11.6 (.457)
11.6 (.457)
17-23
17-23
20-25
20-25
8.4 (.330)
8.4 (.330)
10.6 (.417)
10.6 (.417)
22-28
22-28
25-30
25-30
D
7.2 (.283)
7.2 (.283)
10.0 (.394)
10.0 (.394)
27-33
27-33
--
--
6.3 (.248)
6.3 (.248)
--
--
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.
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