Reed Sensors
Firecracker > 59025
59025 Firecracker Reed Sensor + 57025 Actuator
Electrical Ratings
Normally Open
HighVoltage
Contact Type
Normally Open
Change Over Normally Closed
Switch Type
1
2
3
5
4
5
Contact Rating 1
VA/Watt - max.
10
10
Switching 2
Vdc - max.
Vac - max.
Vdc - min.
200
140
250
300
265
400
175
120
200
175
120
200
Voltage 4
Breakdown 3
Switching 2
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
Current 4
Carry
Contact, Initial
Insulation
Ω - max.
Ω - min.
0.2
0.2
0.2
109
0.2
109
Resistance 5
1010
1010
Capacitance
Temperature
Contact
pF - typ.
°C
0.3
0.2
0.3
0.3
Operating
-40 to +105
-20 to +105
-40 to +105
-40 to +105
Product Characteristics
Operate Time 6
Release Time 6
Shock 7
ms - max.
ms - max.
G - max.
G - max.
1.0
1.0
100
30
3.0
3.0
50
3.0
3.0
50
11ms ꢀ sine
50-2000 Hz
Vibration 7
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 sensitivities and a high voltage switch are options
Sensitivity Options (Using 57025 Actuator)
Select Option
S
T
U
V
Activate Distance
mm (inch)
Activate Distance
mm (inch)
Activate Distance
mm (inch)
Activate Distance
mm (inch)
Pull-In AT
Range
Pull-In AT
Range
Pull-In AT
Range
Pull-In AT
Range
Switch Type
Average
Average
Average
Average
1
2
Normally Open
High Voltage
Change Over
12-18
--
7.9 (.311)
--
17-23
17-23
20-25
20-25
6.2 (.244)
6.2 (.244)
5.7 (.224)
5.7 (.224)
22-28
22-28
25-30
25-30
4.9 (.193)
4.9 (.193)
4.7 (.185)
4.7 (.185)
27-33
27-33
--
4.2 (.165)
4.2 (.165)
3
15-20
7.2 (.283)
7.2 (.283)
--
--
4
Normally Closed 15-20
--
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.
Schematics
Switch Type
Black
Black
Sensor
Actuator
1
3
4
Black
Blue
White
Black
Black
D
© 2015 Littelfuse
Revised: 10/29/15
littelfuse.com
Specifications are subject to change without notice.
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