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