littelfuse.com© 2020 Littelfuse Revised: 01/07/20
Specifications are subject to change without notice.
59045 Miniature PCB Mountable Reed Switch + 57045 Actuator
Description
The 59045 is a miniature PCB-mountable reed switch, 17.78mm x 4.32mm x
3.3mm (0.700” x 0.170” x 0.130”) with a normally open contact. It has moulded
stand-offs to allow board washing. It is capable of switching up to 200Vdc at
10W. It functions best with the matching actuator 57045-000.
Agency Approvals
Agency Agency File Number
E61760
E471070
DEMKO 14 ATEX 1393U
II 3 G Ex nC IIC Gc
Overmolded Reed Switches
Features
• Two-part magnetically operated
proximity switch
• Normally open contact configuration
• Moulded stand-offs to allow
board washing
• Wave solder capable
• Certified for use in North American
Hazardous Locations: Class I,
Division 2 and Zone 2
• ATEX certified for use in European
explosive atmospheres:
II 3 G
Ex nC IIC Gc
• RoHS compliant
Benefits
• Mounts directly into printed
circuit board
• No standby power requirement
• Operates through non-ferrous
materials such as wood, plastic
or aluminium
• Hermetically sealed, magnetically
operated contacts continue to
operate long after optical and other
technologies fail due
to contamination
Applications
• Position and Limit Sensing
• Security System Switch
• Door Switch
Dimensions
Dimensions in mm (inch)
Low Power > 59045
A
Max.
B
Max.
C
±0.25 (.010)
D
Max.
E
±0.38 (.015)
F
Nom.
57045 Actuator
4.32
(.170)
17.78
(.700)
*
3.3
(.130)
– –
59045 Switch
4.32
(.170)
17.78
(.700)
15.24
(.600)
3.3
(.130)
3.3
(.130)
0.4699
(.0185”) Dia.
Note: The 57045 Actuator is sold separately.
* Mounting: 1.57 (.062) thick board, 3.17 (.125) holes on 13.72mm (.540) centerline.
D
D
A
A
E
F
B
B
Switch
Actuator
C
C
Note: Contact Littelfuse for specific agency approval ratings.
littelfuse.com© 2020 Littelfuse Revised: 01/07/20
Specifications are subject to change without notice.
59045 Miniature PCB Mountable Reed Switch + 57045 Actuator
Overmolded Reed Switches
Electrical Ratings
Contact Type Normally Open
Switch Type 1
Contact Rating
1
VA/Watt - max. 10
Voltage
3
Switching
2
Breakdown
4
Vdc - max.
Vac - max.
Vdc - min.
200
140
250
Current
3
Switching
2
Carry
Adc - max.
Aac - max.
Adc - max.
0.5
0.35
1.2
Resistance
Contact, Initial
Insulation
Ω - max.
Ω - min.
0.2
10
10
Capacitance Contact pF - typ. 0.3
Temperature Operating °C -40 to +105
Product Characteristics
Operate Time
5
ms - max. 1.0
Release Time
5
ms - max. 1.0
Shock
6
11ms ½ sine G - max. 100
Vibration
6
50-2000 Hz G - max. 30
Low Power > 59045
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. Electrical Load Life Expectancy - Contact Littelfuse with voltage, current values along with type of load.
4. Breakdown Voltage - per MIL-STD-202, Method 301.
5. Operate (including bounce)/Release Time - per EIA/NARM RS-421-A, diode suppressed coil (Coil II).
6. Shock and Vibration - per EIA/NARM RS-421-A and MIL-STD-202.
Sensitivity Options (Using 57045 Actuator)
Select Option S T U
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
1 Normally Open 15-20 5.0 (.196) 20-25 4.3 (.170) 25-30 3.8 (.150)
Note:
Pull-In Range - Contact Littelfuse for narrower AT ranges available. These AT values are the before molding and modification AT of the 59045.
D