Datasheet

Reed Sensors
Push Button Sensor > 59251
59251 Seating Occupancy Reed Switch Sensor
Description
The 59251 is a magnetically operated push button sensor with simple push fit
clip mounting. It has a large integral dome and it’s normally open contacts
actuate when the dome is depressed. It can switch up to 140Vac/200Vdc at
10W. The 59251 has a large integral dome for load distribution and neoprene
boot for environmental protection. It has choice of various cable lengths and
connector options.
Features
• Choice of cable length
• Choice of connector
• Large integral dome
• Magnetically operated
position sensor
• Simple push fit mounting
• Operates when plunger is
depressed
Dimensions
Dimensions in mm (inch)
Benefits
88.90 108.20
(3.500) (4.260)
Ø66.0
(2.600)
Ø8.13
(.320)
23.88
(.940)
• No standby power required
• Hermetically sealed, magnetically
operated contacts give excellent
life and reliabilty
Applications
2.75
(69.85)
24.38
(.960)
10.00
Cable Length Option±(.390)
• Robust construction makes this
sensor well suited to harsh
environments
• Integral neoprene boot provides
protection from severe
environments
6.35
(.250)
• Seat occupancy sensing
• Position and limit sensing
Activation (without boot)
Operate Distance d1 5.5mm (.217) max.
Release Distance d2 1.5mm (.059) min.
Release
Operate
16.00
(.630)
Rest Position
d1
d2
17.27
(.680)
© 2015 Littelfuse
Revised: 11/02/15
Specifications are subject to change without notice.
littelfuse.com
Reed Sensors
Push Button Sensor > 59251
59251 Seating Occupancy Reed Switch Sensor
Electrical Ratings
Normally
Open
Contact Type
Switch Type
1
Contact Rating
VA/Watt - max.
10
Vdc - max.
Vac - max.
Vdc - min.
200
140
250
Carry
Adc - max.
Aac - max.
Adc - max.
0.5
0.35
0.5
Contact, Initial
Insulation
Ω - max.
Ω - min.
0.2
1010
Capacitance
Contact
pF - typ.
0.2
Temperature
Operating
°C
-40 to +85
Voltage
4
Current
4
1
Switching
2
Breakdown
Switching
Resistance
5
3
2
Product Characteristics
Operate Time
6
ms - max.
1.0
Release Time
6
ms - max.
1.0
11ms 1⁄2 sine
G - max.
100
50-2000 Hz
G - max.
30
Shock
7
Vibration
7
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.
© 2015 Littelfuse
Revised: 11/02/15
Specifications are subject to change without notice.
littelfuse.com
Reed Sensors
Push Button Sensor > 59251
59251 Seating Occupancy Reed Switch Sensor
Cable Length Specification
Part Numbering System
59251 - 1 - S - XX - X
Cable Type: 18 AWG 19/30 XLP Polyethylene
Select Option
Cable Length
mm (inch)
02
300 (11.81)
Series
Termination Specification
Switch Type
Termination Options
Select
Option
Sensitivity
Description
(Two-wire versions illustrated)
A
Tinned leads (6.4±0.76)mm
F
Untinned leads (6.4±0.76)mm
B
Deutsch DTM04-2P
Cable Length
02
Termination
A, B, or F
Packaging
Packaging Option
Packaging Specification
Bulk
© 2015 Littelfuse
Revised: 11/02/15
Specifications are subject to change without notice.
Bulk
Quantity
500
Quantity & Packaging Code
N/A
Taping Width
N/A
littelfuse.com