SMC 3C D-A93 Pneumatic Position Sensor | IP67 Reed Switch

SMC 3C D-A93 Pneumatic Position Sensor | IP67 Reed Switch

Specifications

• Product Name: Reed Type Auto-Switch / Pneumatic Position Sensor

• Model Number: 3C-D-A93

• Series: D-A9 Series

• Sensor Type: Reed Switch (Magnetic proximity sensor)

• Mounting Type: Direct Mount (groove mount)

• Application: Detecting the position of a piston in pneumatic cylinders

• Manufacturer: SMC Corporation (Japan)

Electrical Specifications

• Operating Voltage Range:

  • DC: 24 VDC (Nominal), 5–28 VDC (Range)

  • AC: Up to 100 VAC (for limited usage, resistive load only)

• Max Load Current:

  • DC Resistive Load: 40 mA max

  • AC Load (Non-inductive): 20 mA max (when used at 100 VAC)

• Internal Resistance:

  • Reed Element: 1.2 Ω or less

• Leakage Current: None (mechanical contact type)

• Voltage Drop: 2.4 V max at 20 mA

• Switching Time: ≤1.2 ms

Contact Specifications

• Switching Method: Reed contact (normally open)

• Contact Style: SPST-NO (Single Pole Single Throw – Normally Open)

• Output Type: 2-wire, non-polarized

• Protection Circuit: None (external protection recommended for inductive loads)

Mechanical Specifications

• Dimensions:

  • Length: ~28 mm

  • Width: ~4 mm

  • Height: ~6 mm

• Cable Type:

  • 2-wire type

  • Cable diameter: Ø2.7 mm

  • Standard cable length: 0.5 m, 1 m, or 3 m (custom options available)

  • Conductor cross-section: 0.1 mm² × 2 cores (AWG26)

• Mounting:

  • Slot/groove mounting on SMC cylinders (C85, CJ2, C55, etc.)

  • Secured using mounting screw or band depending on cylinder type

 Environmental Ratings

• Enclosure Rating: IP67 (IEC 60529)

  • Dust-tight

  • Protected against temporary immersion in water (up to 1 meter for 30 minutes)

• Ambient Temperature Range: -10°C to +60°C

• Ambient Humidity: 35%–85% RH (non-condensing)

• Vibration Resistance: 10–55 Hz, 1.5 mm amplitude, in XYZ directions for 2 hours

• Shock Resistance: 100 m/s² (10 G) in XYZ directions, 3 times

Indicator Function

• LED Indicator:

  • Red LED illuminates when the sensor is actuated (magnet detected

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