# REED SENSOR, 0.25A, SPST-NC, CABLE
**URL**: https://novapart.co/products/59040-4-T-02-A/reed-sensor-025a-spst-nc-cable
**SKU**: 59040-4-T-02-A
**Manufacturer**: LITTELFUSE
**Category**: Sensors & Transducers || Sensors || Proximity Sensors / Proximity Switches || Reed Proximity Sensors
**Price**: €2.7800
**Stock**: 10+
## Specifications
| Parameter | Value |
|---|---|
| Product Range | 59040 Series |
| Supply Current | 250mA |
| Sensor Mounting | Cable |
| Sensing Range Max | 18.4mm |
| Operating Temperature Max | 105°C |
| Operating Temperature Min | -40°C |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:2770641/)
**Reed Sensors** Firecracker > 59040
## 59040 Press-Fit Firecracke ~~r Reed Sensor + 57040 Actuator~~
## **Description**
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Sensor
Actuator
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The 59040 Press-Fit Firecracker Reed Sensor is a small, cylindrical reed sensor 31.0mm (1.22”) long that presses into a 9.5mm (.375”) diameter hole with a choice of normally open, normally closed or change-over contacts. It is capable of switching up to 200Vdc at 10W and is available with a range of sensitivity, cable length, plastic housing color (white, black, and wooden brown), and connector options. It has three crush ribs along the length of the capsule that allow a firm and fixed press-fit. It is well suited for position and limit sensing, security, level sensing applications. It functions best with the 57040 actuator.
**Note: The 57040 Actuator is sold separately.**
## **Features**
## **Agency Approvals**
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Agency Agency File Number
E61760
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Note: Contact Littelfuse for specific agency approval ratings.
## **Dimensions**
Dimensions in mm (inch)
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Sensor
8.46±0.25
eo) = = (.333±.01) =
10.70 ±0.25
31.00±0.25 300
(.42 ±.01) f (1.22±.01) d (11.81)
Actuator
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- Hermetically sealed contacts
- Magnetically-operated press-fit proximity sensor
- Customer-defined sensitivity options available
- Cylindrical capsule with retaining ribs
- Custom cable length and connector options available
- Operates and mounts through nonferrous materials such as wood, plastic or aluminum
- Press-fits into a standard drill size hole of 9.5mm (.375”) diameter
## **Benefits**
- Ribs on capsule compress when • Non-contact solution, aesthetically inserted into a mounting hole and more appealing than push-button or provide retaining force, allowing lever mechanical-type switches simple and secure press-fit • Ideal for battery-powered installation applications as the contacts do not
- • Quick and easy press-fit installation draw power when in the nonactivated state
- Quick and easy press-fit installation that requires no screws, brackets, nor glue.
- nor glue. • Reed contacts last for millions of
- • Well suited for usage in highoperating cycles under micromoisture and contaminated controller voltage and current logicenvironments level loads
## **Applications**
- Appliances
- Position and limit sensing
- Security
- Industrial
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8.46±0.25
(.333±.01)
me
©) ET
10.70 ±0.25
31.00±0.25
(.42 ±.01)
(1.22±.01)
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Notes:
1. The 59040 Sensor and 57040 Actuator are designed to fit into a drill size hole of 9.5mm (0.375") diameter.
2. Not recommended to be mounted within ferrous metal materials. The activate distance will decrease significantly.
© 2016 Littelfuse Revised: 03/02/16 Specifications are subject to change without notice.
littelfuse.com
**Reed Sensors** Firecracker > 59040
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## 59040 Press-Fit Firecracke ~~r Reed Sensor + 57040 Actuator~~
## **Electrical Ratings**
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Contact Type Normally Open Change Over Normally Closed
Switch Type 1 3 4
Contact Rating [1] VA/Watt - max. 10 5 5
Switching [2] Vdc - max. 200 175 175
Voltage [4] Vac - max. 140 120 120
Breakdown [3] Vdc - min. 250 200 200
Switching [2] Adc - max. 0.5 0.25 0.25
Current [4] Aac - max. 0.35 0.18 0.18
Carry Adc - max. 1.2 1.5 1.5
Contact, Initial Ω - max. 0.2 0.2 0.2
Resistance [5]
Insulation Ω - min. 10 [10] 10 [9] 10 [9]
Capacitance Contact pF - typ. 0.3 1.0 1.0
Temperature Operating °C -40 to +105 -40 to +105 -40 to +105
Product Characteristics
Operate Time [6] ms - max. 1.0 3.0 3.0
Release Time [6] ms - max. 1.0 3.0 3.0
Shock [7] 11ms 1⁄2 sine G - max. 100 50 50
Vibration [7] 50-2000 Hz G - max. 30 30 30
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## 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 11.81in 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, adding a special connector, or plastic housing color options, please contact Littelfuse.
9. Custom sensitivity options and a normally open high-voltage switch option are available.
## **Sensitivity Options (Using 57040 Actuator)**
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Select Option S T U
Pull-In Activate Distance, D Pull-In Activate Distance, D Pull-In Activate Distance, D
Switch Type mm (inch) mm (inch) mm (inch)
AT Range AT Range AT Range
Average Average Average
1 Normally Open 12-18 25.0 (.984) 17-23 21.2 (.834) 22-28 17.9 (.705)
3 Change Over 15-20 21.0 (.836) 20-25 18.4 (.725) 25-30 17.0 (.670)
4 Normally Closed 15-20 21.0 (.836) 20-25 18.4 (.725) 25-30 17.0 (.670)
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Note:
1. Pull-In AT Range: These AT values are the bare reed switch AT before modification.
2. The activate distance is an average value for the final sensor assembly.
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3. Not recommended to be mounted within/near ferrous metal materials; if doing so, these
activate distances will decrease significantly. Schematics Switch Type
Black
1
Actuator Sensor Black
Black
Blue 3
White
Black
4
D Black
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3. Not recommended to be mounted within/near ferrous metal materials; if doing so, these activate distances will decrease significantly.
© 2016 Littelfuse Revised: 03/02/16 Specifications are subject to change without notice.
littelfuse.com
**Reed Sensors** Firecracker > 59040
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## - 59040 Press Fit Firecracke ~~r Reed Sensor + 57040 Actuator~~
## **Cable Length Specification**
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Cable Type: 24 AWG PVC 105°C UL1430/UL1569
Cable Length
Select Option
mm (inch)
02 300 (11.81)
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## **Termination Specification**
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Termination Options
Select Description
Option (Two-wire versions illustrated)
A Tinned leads (6.4±0.76)mm
F Untinned leads (6.4±0.76)mm
E JST type XHP 2.5mm pitch
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## **Part Numbering System**
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Sensor: 59040 - X - X - XX - X Actuator: 57040 - 000
Series Series
Switch Type Standard Actuator
1, 3, or 4 000
Sensitivity Note: The 57040 Actuator is sold separately.
S, T, or U
Cable Length
02
Termination
A, F, or E
Product Marking
LITTELFUSE
59040 - X - X - XX - X
XXXX
Part Number
Date Code
(YYWW)
Packaging
Packaging Option Packaging Specification Quantity Quantity and Packaging Code Taping Width
Bulk Bulk 500 N/A N/A
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© 2016 Littelfuse Revised: 03/02/16 Specifications are subject to change without notice.
littelfuse.com
## Links
- [View this product on Novapart](https://novapart.co/products/59040-4-T-02-A/reed-sensor-025a-spst-nc-cable)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/en-ES/hamlin/59040-4-t-02-a/reed-sensor-0-25a-spst-nc-cable/dp/2770641)
---
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