Reed Sensors
Flange Mounting Sensor > 59125
59125 Pinned Flange Sensor + 57125 Actuator
Description
The 59125 is a flange mounting reed sensor 28.57mm x 19.05mm x 6.35mm
(1.125” x 0.750” x 0.259”) with integral terminal pins with a choice of normally
open, normally open high voltage or normally closed contacts. It’s case design
enables screw or adhesive mounting. It is capable of switching up to
265Vac/300Vdc at 10VA. The 59125 functions best with the matching
actuator 57125-000.
Note: The 57125 Actuator is sold separately.
Features
Agency Approvals
Agency
Agency File Number
E61760
Note: Contact Littelfuse for specific agency approval ratings.
• Two-part magnetically operated
proximity sensor
• Moulded in terminal pins accept
push on connector or wire wrap
• Case design allows screw down or
adhesive mounting
• Customer defined sensitivity option
Benefits
• Hermetically sealed, magnetically
operated contacts continue to
operate long after optical and other
technologies fail due to
contamination
• No standby power requirement
• Operates through non-ferrous
materials such as wood, plastic or
aluminium
Dimensions
Dimensions in mm (inch)
28.57
(1.125)
9.53
(.375)
6.35
(.259)
Applications
• Position and limit sensing
• Security system switch
• Linear actuators
• Industrial process control
14.28
(.562)
19.05
(.75)
15.88
(.625)
3.18x7
.82
(.125x.308 LG.)
SLOT 2
3.43
(.135)
4.05
(.160)
28.57
(1.125)
6.10 (.240)
SQ. PINS x 2
0.64
2.54 (.100)
(.025)
2.54 (.100)
9.53
(.375)
6.35
(.250)
14.28
(.562)
19.05
(.75)
15.88
(.625)
3.18x7
.82
(.125x.308 LG.)
SLOT 2
6.35 (.250)
3.43
(.135)
© 2015 Littelfuse
Revised: 10/29/15
Specifications are subject to change without notice.
littelfuse.com
Reed Sensors
Flange Mounting Sensor > 59125
59125 Pinned Flange Sensor + 57125 Actuator
Electrical Ratings
Contact Type
Switch Type
Contact Rating
Voltage
4
1
Normally
Open
1
VA/Watt - max.
Switching
2
Normally Open
High Voltage
2
10
300
265
400
0.4
0.30
1.4
0.2
10
10
0.2
-20 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
1.0
1.0
100
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.
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.
Sensitivity Options (Using 57125 Actuator)
Select Option
Switch Type
Pull-In AT
Range
S
T
Pull-In AT
Range
U
Activate Distance
mm (inch)
Average
Pull-In AT
Range
V
Activate Distance
mm (inch)
Average
Activate Distance
Activate Distance
Pull-In AT
mm (inch)
mm (inch)
Range
Average
Average
1
2
4
Normally Open
High Voltage
Normally Closed
12-18
--
15-20
12.5 (.492
--
8.0 (.315)
17-23
17-23
20-25
11.3 (.445)
11.3 (.445)
7.2 (.283)
22-28
22-28
25-30
D
9.8 (.385)
9.8 (.385)
5.9 (.233)
27-33
27-33
--
8.9 (.350)
8.9 (.350)
--
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
© 2015 Littelfuse
Revised: 10/29/15
Specifications are subject to change without notice.
littelfuse.com
Flange Mounting Sensor > 59125
Reed Sensors
59125 Pinned Flange Sensor + 57125 Actuator
Part Numbering System
Sensor:
59125 - X - X - 00 - 0
Actuator: 57125 - 000
Series
Switch Type
1, 2, or 4
Sensitivity
S, T, U, or V
Series
Standard Actuator
000
Note: The 57125 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
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