OMRON A7AS Technical data

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Thumbwheel Switch A7AS

Easy-to-Assemble Thumbwheel Switch

■ Dustproof construction ensures highly reliable

performance at low voltage and very small
current even under adverse environmental
conditions

■ Switch units can be assembled simply by

fitting the integral hook coupler of each unit
into the mating unit, thus eliminating the need
of bolts and nuts for assembly

Ordering Information

■ SWITCH UNITS

Part Number

Front mounting solder terminals
Output Code Light gray case Black case
03 (decimal code) A7AS-203 A7AS-203-1
06 (binary code) A7AS-206 A7AS-206-1

(binary code w/+, – display) A7AS-206-PM A7AS-206-PM-1
07 (binary code w/diode provision) A7AS-207 A7AS-207-1
19 (decimal code w/diode provision) A7AS-219 A7AS-219-1
22 (compliment of BCD) A7AS-222 A7AS-222-1

■ ACCESSORIES

Part Number

For front mounting type switch assembly terminals
Accessory Light gray Black
End Cap A7AS-M A7AS-M-1
Spacer NRT-P■■ NRT-P■■-1
Connector Solder terminal NRT-C NRT-C

PC terminal NRT-CP NRT-CP

Note: 1. When placing your order, please specify the model numbers and quantities of required switch units, end caps, and spacers,

respectively. (Note that switch units and accessories are not factory-assembled for shipment.)

2. Switch case, end cap, and spacer are made of polyacetal resin.

3. One of the following alphabetic codes must be filled into the boxed part of the model number to specify a legend to be hot
stamped on the required spacer.

4. End caps come as a set -- left and right.

Code Legend Code Legend
A Hot stamp not required H cm
B SEC J m
C MIN K ºC
D H L PCS
E g Q x 10 SEC
Fkg
Gmm

T0

A7AS A7AS

Characteristics

Switching capacity 1 mA to 0.1 A 50 VAC/28 VDC (resistive load)
Carry current 1 A (max.)
Contact resistance 200 mΩ max.
Insulation resistance 10 MΩ min. (at 500 VDC) between nonconnected terminals

1,000 MΩ min. (at 500 VDC) between each terminal and noncurrent-carrying part

Dielectric strength

Operating force 400 g max.
Vibration 10 to 55 Hz, 1.5 mm double amplitude
Shock 500 m/s2 (approx. 50 G)
Ambient temperature Operating -40o to 85oC

Storage -40o to 85oC
Humidity 85% RH max.
Service life Mechanical 1,000,000 operations (steps) min.

Electrical 50,000 operations (steps) min.
Weight (per unit) Approx. 7.6 g

Note: Data shown are of initial value.

600 VAC, 50/60 Hz for 1 minute between nonconnected terminals
1,000 VAC, 50/60 Hz for 1 minute between each terminal and noncurrent-carrying part

Dimensions

Unit: mm (inch)

■ SWITCH UNITS

A7AS-203(-1), A7AS-206(-1)
A7AS-207(-1), A7AS-219(-1)
A7AS-222(-1)

Panel cutout

No. of A B C
units (n) (8n + 11) (8n + 8) (B + 1)

1 19 (0.75) 16 (0.63) 17 (0.67)
2 27 (1.06) 24 (0.94) 25 (0.98)
3 35 (1.38) 32 (1.26) 33 (1.30)
4 43 (1.69) 40 (1.57) 41 (1.66)
5 51 ± 0.8 48 ± 0.8 49 (1.93)

(2 ± 0.03) (1.89 ± 0.03)

6 59 ± 0.8 56 ± 0.8 57 (2.24)

7 67 ± 0.8 64 ± 0.8 65 (2.56)

8 75 ± 0.8 72 ± 0.8 73 (2.87)

9 83 ± 0.8 80 ± 0.8 81 (3.19)

10 91 ± 0.8 88 ± 0.8 89 (3.50)

Note: Dimension * is 41.5 (1.63) for the switch with

(2.32 ± 0.03) (2.20 ± 0.03)

(2.64 ± 0.03) (2.52 ± 0.03)

(2.95 ± 0.03) (2.83 ± 0.03)

(3.27 ± 0.03) (3.15)

(3.58 ± 0.03) (3.46 ± 0.03)

output code “03” or “06,” and 53.5 (2.11) for
the switch with output code “07” or “19.”

Note: 1. Unless otherwise specified, a tolerance of ± 0.4 mm applies to all dimensions.

2. Each model number applies to a single switch unit and not to the switch assembly as shown in the drawings.

2