Thumb Rotary Switch A7MD

Thumb Rotary Switch  A7MD

· An ultra small, rotary operated thumb switch.
· Features gold contacts for improved reliability.


Japanese Only

Part Number

Configured Part Number is shown.


Ultra-Small Rotary Switch A7MD Specifications

Thumb Rotary Switch A7MD: related images

A7MD external appearance

Thumb Rotary Switch A7MD: related images

A7MD dimensional drawing
Units: mm

Number of Units
Dimension A
(n × 5 + 3)
Dimension B
(n × 5 + 5)

Note 1: The above dimensions include the end caps on both sides.
However, if spare units are added, there will be a 5-mm increase for each.
Note 2: Where not specified, the dimensional tolerance is ±0.4 mm.
The tolerance when multiple units are connected is ±(number of units × 0.4) mm.


ModelModel A7MD
Switching Load Capacity (Resistance Load)1 mA to 0.1 A, 3.3 to 28 V DC
Maximum Continuous Electric Current1 A or Less
Contact Resistance300 mΩ or Less (10 Ω or Less)
Insulation ResistanceBetween Terminals of Same Polarity10 MΩ or More (with 500 V DC Megohmmeter)
Between Earth and Each Terminal1,000 MΩ or More (with 500 V DC Megohmmeter)
Withstand VoltageBetween Terminals of Same Polarity200 V AC 50/60 Hz 1 min
Between Earth and Each Terminal1,000 V AC 50/60 Hz 1 min
VibrationMalfunction10 to 55 Hz, Double Amplitude 1.5 mm 2 h
Shock / ImpactMalfunction490 m/s2 or More
DurabilityMechanical30,000 Steps or More
Electrical20,000 Steps or More
Ambient Operating Temperature-10 to +65°C (Assuming No Freezing)
Operating Ambient Humidity45 to 85% RH
Operating Force2.94 N or Less

Refer to the catalog for other specifications.

Part Number
Part NumberVolume DiscountDays to Ship
Same day


  1. 1

Basic Information

Dimension vertical(mm) 16 Dimension width(mm) 5 Dimension depth(mm) 14
Type Thumbwheel Rated Voltage(V) DC5 to 28V Rated Current(A) 1 mA → 0.1 A
Mounting Type Wall mount Terminal shape PCB Terminal Panel mounting method Fixed by circuit board
Operation Method Thumbwheel Output cord (thumbwheel) Binary-coded decimal Case color Black
Protective structure details NA

Please check the type/dimensions/specifications of the part A7MD-106-P-09 in the Thumb Rotary Switch A7MD series.

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