59030 Series - Firecracker Reed Sensor

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A cylindrical reed sensor 38.1mm x 6.22mm (1.50" x 0.245") with a choice of normally open, normally closed or changeover contacts. Capable of switching up to 265Vac/300Vdc at 10VA. Available with a range of sensitivity and cable length options. Ideally suited for position and limit sensing, security, level sensing and linear actuator applications. Functions best with the 57030 actuator.

Note: The 57030 actuator is sold separately.


  • Magnetically-operated proximity sensor
  • Operates through non-ferrous materials such as wood, plastic or aluminum
  • Hermetically sealed contacts
  • Options of normally open, normally closed or single-pole-double-throw
  • Customer-defined sensitivity
  • Custom cable length and connector options available


  • Quick and easy to install
  • Well suited for usage in high-moisture and contaminated environments
  • Non-contact solution, aesthetically more appealing than push-button or lever mechanical-type switches
  • Ideal for battery-powered applications as the contacts do not draw power when in the non-activated state
  • Reed contacts last for millions of operating cycles under micro-controller voltage and current logic-level loads


  • Position and limit switching
  • Security
  • Level sensing
  • Linear actuators

Access specifications, certifications, check availability and order parts below

Catalog #Switching Power (W)Switching Voltage (V DC)Switching Current (A DC)Switching Voltage (V AC)Switching Current (A AC)Breakdown Voltage (V DC)Max Contact Resistance (Ω)Magnetic Sensitivity (AT)Nominal Activate Distance (mm)Switch TypeMin Operating Temp (°C)Max Operating Temp (°C)Max Operate Time (ms)Max Release Time (ms)StockCompare
59030-1-S102000.52650.352500.212 to 188.4A:SPST-NO-4010511Check
59030-1-T102000.52650.352500.217 to 236.6A:SPST-NO-4010511Check
59030-1-U102000.52650.352500.222 to 285.1A:SPST-NO-4010511Check
59030-1-V102000.52650.352500.227 to 334A:SPST-NO-4010511Check
59030-2-T103000.41400.34000.217 to 236.6A:SPST-NO-2010511Check
59030-2-U103000.41400.34000.222 to 285.1A:SPST-NO-2010511Check
59030-2-V103000.41400.34000.227 to 334A:SPST-NO-2010511Check
59030-3-S51750.251200.182000.215 to 206.5C: SPDT-CO-4010533Check
59030-3-T51750.251200.182000.220 to 254.9C: SPDT-CO-4010533Check
59030-3-U51750.251200.182000.225 to 303.7C: SPDT-CO-4010533Check
59030-4-S51750.251200.182000.215 to 206.5B:SPST-NC-4010533Check
59030-4-T51750.251200.182000.220 to 254.9B:SPST-NC-4010533Check
59030-4-U51750.251200.182000.225 to 303.7B:SPST-NC-4010533Check

pdf icon Sensing Products Selection Guide

This guide provides an introduction to magnetic sensing and options for value-added custom design packages.

pdf icon Flow Sensing in Tankless Water Heaters Application Note

Reed switches and sensors are highly effective solutions for flow sensing applications that can be used for detecting the presence of fluid flow in a system or even measure the rate of fluid flow.

pdf icon Position and Level Sensing in Washing Machines

A most integral appliance in any home is a washing machine. Washing machines have helped made the chore of cleaning clothes quite effortless.

pdf icon Rice Cooker Lid Lock Application Note

The position sensing lid lock ensures that the lid is securely locked in place.

pdf icon Capacitive Loads Application Note

When there is significant capacitance in a reed sensor reed relay or reed switch circuit the peak current and energy switched by the reed contacts should be considered.

pdf icon Inductive Load Arc Suppression Application Note

When a reed switch or reed sensor is used to control an inductive device (relay coil solenoid transformer small motor etc.)

pdf icon Reed Switch and Reed Sensor Activation Application Note

Although a reed switch can be activated by placing it inside an electrical coil many reed switches and reed sensors are used for proximity sensing and are activated by a magnet.

pdf icon Reed Switch Extended Shock Capabilities Application Note

The maximum shock specifications in the Littelfuse catalog are very conservative for most switches smaller than the DRxxxx type. T

pdf icon Vibration Testing and Precautions Application Note

Littelfuse tests sinusoidal vibration according to Mil. Std. 202G Method 204D Test Condition G (10 � 2000 Hz frequency sweep at 30 G or 0.06 inch double amplitude whichever is less).

To request product environmental information, please complete the Product Environmental Information Request Form.