59025 Series Datasheet by Littelfuse Inc.

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littelfuse.com© 2019 Littelfuse Revised: 02/08/19
Specifications are subject to change without notice.
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.
Agency Approvals
Agency Agency File Number
E61760
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
• RoHS compliant
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
Applications
• Position and limit sensing
• Security
Level sensing
• Linear actuators
Dimensions
Dimensions in mm (inch)
A
Nom. B
Nom. C
Nom.
57025 Actuator 6.22 (.245) 25.40 (1.000) --
59025 Sensor 6.22 (.245 25.40 (1.000) Cable Length ±
10.00 (.393)
Note: The 57025 Actuator is sold separately.
Note: Contact Littelfuse for specific agency approval ratings.
A
A
B C
% Litteltuse" Wu.» mm \ Mum's mm
littelfuse.com© 2019 Littelfuse Revised: 02/08/19
Specifications are subject to change without notice.
Reed Sensors
Firecracker > 59025
59025 Firecracker Reed Sensor + 57025 Actuator
Electrical Ratings
Contact Type Normally Open Normally Open
HighVoltage 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 1⁄2 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. 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
Schematics Switch Type
1
3
4
Black
Black
Black
Blue
White
Black
Black
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.
D
Sensor Actuator
Sensitivity Options (Using 57025 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 7.9 (.311) 17-23 6.2 (.244) 22-28 4.9 (.193) 27-33 4.2 (.165)
2High Voltage -- -- 17-23 6.2 (.244) 22-28 4.9 (.193) 27-33 4.2 (.165)
3Change Over 15-20 7.2 (.283) 20-25 5.7 (.224) 25-30 4.7 (.185) -- --
4Normally Closed 15-20 7.2 (.283) 20-25 5.7 (.224) 25-30 4.7 (.185) -- --
% Litteltus Exp-vlb-ADDIM \ 59025-X X XX X Egl 57025 000
littelfuse.com© 2019 Littelfuse Revised: 02/08/19
Specifications are subject to change without notice.
Reed Sensors
Firecracker > 59025
Packaging
Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width
Bulk Bulk 500 N/A N/A
Part Numbering System
59025 - X - X - XX - X
Series
Switch Type
1, 2, 3, or 4
Sensitivity
S, T, U or V
Termination
A, F, or E
Cable Length
02
57025 - 000
Sensor:
Actuator:
Series
Standard Actuator
000
59025 Firecracker Reed Sensor + 57025 Actuator
Cable Length Specification
Cable Type: 24 AWG 7/32 PVC 105°C UL1430/UL1569
Select Option Cable Length
mm (inch)
02 300 (11.81)
Termination Specification
Termination Options
Select
Option Description
(Two-wire versions illustrated)
ATinned leads (6.4±0.76)mm
FUntinned leads (6.4±0.76)mm
EJST type XHP 2.5mm pitch
Note: The 57025 Actuator is sold separately.
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
Read complete Disclaimer Notice at http://www.littelfuse.com/disclaimer-electronics.

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