59040 Datasheet, PDF (2/3 Pages) Littelfuse – Press-Fit Firecracker Reed Sensor

Reed Sensors
Firecracker > 59040
59040 Press-Fit Firecracker Reed Sensor + 57040 Actuator
Electrical Ratings
Contact Type
Switch Type
Contact Rating ¹
Voltage ⁴
Current ⁴
Resistance ⁵
Capacitance
Temperature
Switching ²
Breakdown ³
Switching ²
Carry
Contact, Initial
Insulation
Contact
Operating
VA/Watt - max.
Vdc - max.
Vac - max.
Vdc - min.
Adc - max.
Aac - max.
Adc - max.
Ω - max.
Ω - min.
pF - typ.
°C
Normally Open
1
10
200
140
250
0.5
0.35
1.2
0.2
10¹⁰
0.3
-40 to +105
Change Over
3
5
175
120
200
0.25
1.0
1.5
0.2
10⁹
0.3
-40 to +105
Normally Closed
4
5
175
120
200
0.25
1.0
1.5
0.2
10⁹
0.3
-40 to +105
Product Characteristics
Operate Time ⁶
ms - max.
1.0
3.0
3.0
Release Time ⁶
ms - max.
1.0
3.0
3.0
Shock ⁷
11ms 1⁄2 sine
G - max.
100
50
50
Vibration ⁷
50-2000 Hz
G - max.
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. Leakage current is less than 0.1mA for 60 seconds.
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.
9. Custom sensitivity options and a normally open high-voltage switch option are available.
Sensitivity Options (Using 57040 Actuator)
Select Option
S
T
U
Switch Type
Activate Distance
Activate Distance
Activate Distance
Pull-In AT Range
mm (inch)
Pull-In AT Range
mm (inch)
Pull-In AT Range
mm (inch)
Average
Average
Average
1
Normally Open
12-18
25.0 (.984)
17-23
21.2 (.834)
22-28
17.9 (.705)
3
Change Over
15-20
21.0 (.836)
20-25
18.4 (.725)
25-30
17.0 (.670)
4
Normally Closed
15-20
21.0 (.836)
20-25
18.4 (.725)
25-30
17.0 (.670)
Note:
1. Pull-In AT Range: These AT values are the bare reed switch AT before modification.
2. The activate distance is an average value for the final sensor assembly.
3. Not recommended to be mounted within/near ferrous metal materials; if doing so, these
activate distances will decrease significantly.
Schematics
Switch Type
Actuator
Sensor
D
Black
1
Black
Black
Blue
3
White
Black
4
Black
© 2015 Littelfuse
Revised: 11/02/15
Specifications are subject to change without notice.
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