Reed Sensors
Firecracker > 59025
59025 Firecracker Reed Sensor + 57025 Actuator
Description
The 59025 Firecracker Reed Sensor is a small cylindrical reed sensor, 25.4mm (L)
x 6.22mm (Dia.) (1.00” x 0.245”), with a choice of normally open, normally closed
or change-over contacts. It is capable of switching up to 265Vac/300Vdc
at 10VA. The 59025 Firecracker Reed Sensor is available with a range of
sensitivity and cable length options. It functions best with the 57025 actuator.
Note: The 57025 Actuator is sold separately.
Features
• Magnetically-operated proximity
sensor
• Hermetically sealed contacts
• Operates through non-ferrous
materials such as wood, plastic
or aluminum
• Customer-defined sensitivity option
• Custom cable length and connector
options available
Agency Approvals
Agency
Agency File Number
E61760
Note: Contact Littelfuse for specific agency approval ratings.
Benefits
• Fits nicely into small confined
spaces
• Quick and easy to install
• 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 logic level loads
Dimensions
Dimensions in mm (inch)
A
A
B
C
Applications
• Position and limit sensing
• Security
• Level sensing
• Linear actuators
A
Nom.
57025 Actuator
59025 Sensor
B
Nom.
25.40 (1.000)
25.40 (1.000)
C
Nom.
--
Cable Length ±
10.00 (.393)
6.22 (.245)
6.22 (.245
© 2015 Littelfuse
Revised: 10/29/15
Specifications are subject to change without notice.
littelfuse.com
Reed Sensors
Firecracker > 59025
59025 Firecracker Reed Sensor + 57025 Actuator
Electrical Ratings
Contact Type
Switch Type
Contact Rating
Voltage
4
1
Normally Open
1
VA/Watt - max.
Switching
2
Normally Open
HighVoltage
2
10
300
265
400
0.4
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
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. 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
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
7.9 (.311)
--
7.2 (.283)
7.2 (.283)
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)
--
--
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
Black
Blue
White
Sensor
Actuator
1
3
4
D
© 2015 Littelfuse
Revised: 10/29/15
Specifications are subject to change without notice.
Black
Black
littelfuse.com
Firecracker > 59025
Reed Sensors
59025 Firecracker Reed Sensor + 57025 Actuator
Cable Length Specification
Cable Type: 24 AWG 7/32 PVC 105°C UL1430/UL1569
Select Option
02
Cable Length
mm (inch)
300 (11.81)
Part Numbering System
Sensor:
59025 - X - X - XX - X
Series
Termination Specification
Termination Options
Select
Option
A
F
E
Description
(Two-wire versions illustrated)
Tinned leads (6.4±0.76)mm
Untinned leads (6.4±0.76)mm
JST type XHP 2.5mm pitch
Switch Type
1, 2, 3, or 4
Sensitivity
S, T, U or V
Cable Length
02
Termination
A, F or E
,
Actuator:
57025 - 000
Series
Standard Actuator
000
Note: The 57025 Actuator is sold separately.
Packaging
Packaging Option
Bulk
Packaging Specification
Bulk
Quantity
500
Quantity & Packaging Code
N/A
Taping Width
N/A
© 2015 Littelfuse
Revised: 10/29/15
Specifications are subject to change without notice.
littelfuse.com
Embedded System
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