
Series A Miniature Rotary Selector Switches
NOTE TO OUR OVERSEAS CUSTOMERS: All Janco rotary selector switches on our site are designated EAR99, which means they can be shipped to most destinations under most circumstances, under the designation "NLR" (No License Required), according to the US Bureau of Industry and Security.
 Series A  15° Indexing
 Series A  20° Indexing
 Series A  22° Indexing
 Series A  30° Indexing
 Series A  36° Indexing
 Series A  45° Indexing
 Series A  60° Indexing
 Series A  90° Indexing
 Series AA  15° Indexing
 Series AA  22° Indexing
 Series AA  30°, 36°, 45° Indexing
 Series AC  30°, 36°, 45°, 60°, 90° Indexing
Series A  15° Indexing
Designed to meet or exceed the requirements of MILDTL3786
Same as and interchangeable with 61900 Series
No. of Positions 
24 Positions
1 Pole Per Deck
12 Positions
2 Poles Per Deck
8 Positions
3 Poles Per Deck
6 Positions
4 Poles Per Deck
4 Positions
6 Poles Per Deck 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
5 amps res. 115 v ac
3 amps res. 28 v dc
2 amps ind. 28 v dc

Torque: 
1 thru 5 decks  5 in. lbs. max.
6 thru 12 decks  8 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.00 in. max for 1 deck switch
add .375 in. max. for each additional deck 
Weight: 
.37 lb. max. for 1 deck switch
add .07 lb. for each additional deck 
Notes: 
NO. OF POSITIONS:
224: 1 Pole per deck
212: 2 Poles per deck
28: 3 Poles per deck
26: 4 Poles per deck
24: 6 Poles per deck
NONSHORTING CONTACTS:
Break before make
SHORTING CONTACTS:
Make before break
1 pole per deck, 24 positions, may have stops or be continuous rotation. All other switches will have stops.
All multipole switches will have common terminals identified A, B, C, etc. Add letter "D" to P/N Code for deck identification on single pole construction switches. Letter to be adjacent to common terminals. 

Series A  20° Indexing
Designed to meet or exceed the requirements of MILDTL3786
Same as and interchangeable with 121900 Series
No. of Positions 
18 Positions
1 Pole Per Deck 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
5 amps res. 115 v ac
3 amps res. 28 v dc
2 amps ind. 28 v dc

Torque: 
1 thru 5 decks  5 in. lbs. max.
6 thru 12 decks  8 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.00 in. max for 1 deck switch
add .375 in. max. for each additional deck 
Weight: 
.37 lb. max. for 1 deck switch
add .07 lb. for each additional deck 
Notes: 
NO. OF POSITIONS:
218: 1 Pole per deck
NONSHORTING CONTACTS:
Break before make
SHORTING CONTACTS:
Make before break
1 pole per deck, 18 positions, may have stops or be continuous rotation. All other switches will have stops.
If deck identification is required, decks will be identified A, B, C, etc. Letter adjacent to common terminals.


Series A  22° Indexing
Designed to meet or exceed the requirements of MILDTL3786
Same as and interchangeable with 31900 Series
No. of Positions 
16 Positions
1 Pole Per Deck
8 Positions
2 Poles Per Deck
4 Positions
4 Poles Per Deck 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
5 amps res. 115 v ac
3 amps res. 28 v dc
2 amps ind. 28 v dc

Torque: 
1 thru 5 decks  5 in. lbs. max.
6 thru 12 decks  8 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.36 in. max for 1 deck switch
add .375 in. max. for each additional deck 
Weight: 
.28 lb. max. for 1 deck switch
add .06 lb. for each additional deck 
Notes: 
All multipole switches will have common terminals identified A, B, C, etc. Add letter "D" to P/N Code for deck identification on single pole construction switches. Letter to be adjacent to common terminal.
NONSHORTING CONTACTS:
Break before make
SHORTING CONTACTS:
Make before break
Adjustable Stop Data:
Switch must be in Position 1 prior to adjusting stops. Remove rear plate. Install the (2) stop pins in desired positions. Replace rear plate. If continuous rotation is required (1 pole/deck only), remove pins and place into side holes for storage.


Series A  30° Indexing
Designed to meet or exceed the requirements of MILDTL3786
Same as and interchangeable with 1905 Series
No. of Positions 
12 Positions
1 Pole Per Deck
6 Positions
2 Poles Per Deck
4 Positions
3 Poles Per Deck
3 Positions
4 Poles Per Deck
2 Positions
6 Poles Per Deck 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
2 amps res. 115 v ac
1 amps res. 28 v dc
.5 amps ind. 28 v dc

Torque: 
1 thru 5 decks  3 in. lbs. max.
6 thru 12 decks  5 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.00 in. max for 1 deck switch
add .35 in. max. for each additional deck 
Weight: 
.12 lb. max. for 1 deck switch
add .03 lb. for each additional deck 
Notes: 
NO. OF POSITIONS:
212: 1 Pole per deck
26: 2 Poles per deck
24: 3 Poles per deck
23: 4 Poles per deck
22: 6 Poles per deck
NONSHORTING CONTACTS:
Break before make
SHORTING CONTACTS:
Make before break
1 pole per deck, 12 positions, may have stops or be continuous rotation. All other switches will have stops.
All multipole switches will have common terminals identified A, B, C, etc. Add letter "D" to P/N Code for deck identification on single pole construction switches. Letter to be adjacent to common terminals. 

Series A  36° Indexing
Designed to meet or exceed the requirements of MILDTL3786
Same as and interchangeable with 1900 Series
No. of Positions 
10 Positions
1 Pole Per Deck
5 Positions
2 Poles Per Deck 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
5 amps res. 115 v ac
3 amps res. 28 v dc
2 amps ind. 28 v dc

Torque: 
1 thru 5 decks  3 in. lbs. max.
6 thru 12 decks  5 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.00 in. max for 1 deck switch
add .35 in. max. for each additional deck 
Weight: 
.12 lb. max. for 1 deck switch
add .03 lb. for each additional deck 
Notes: 
NO. OF POSITIONS:
210: 1 Pole per deck
25: 2 Poles per deck
NONSHORTING CONTACTS:
Break before make
SHORTING CONTACTS:
Make before break
1 pole per deck, 10 positions, may have stops or be continuous rotation. All other switches will have stops.
All multipole switches will have common terminals identified A, B, C, etc. Add letter "D" to P/N Code for deck identification on single pole construction switches. Letter to be adjacent to common terminals. 

Series A  45° Indexing
Designed to meet or exceed the requirements of MILDTL3786
Same as and interchangeable with 1906 Series
No. of Positions 
8 Positions
1 Pole Per Deck
4 Positions
2 Poles Per Deck 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
5 amps res. 115 v ac
5 amps res. 28 v dc
2.5 amps ind. 28 v dc

Torque: 
1 thru 5 decks  4 in. lbs. max.
6 thru 12 decks  8 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.06 in. max for 1 deck switch
add .410 in. max. for each additional deck 
Weight: 
.13 lb. max. for 1 deck switch
add .04 lb. for each additional deck 
Notes: 
NO. OF POSITIONS:
28: 1 Pole per deck
24: 2 Poles per deck
NONSHORTING CONTACTS:
Break before make
SHORTING CONTACTS:
Make before break
1 pole per deck, 8 positions, may have stops or be continuous rotation. All other switches will have stops.
All multipole switches will have common terminals identified A, B, C, etc. Add letter "D" to P/N Code for deck identification on single pole construction switches. Letter to be adjacent to common terminals. 

Series A  60° Indexing
Designed to meet or exceed the requirements of MILDTL3786
Same as and interchangeable with 501926 Series
No. of Positions 
6 Positions
1 Pole Per Deck 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
5 amps res. 115 v ac
3 amps res. 28 v dc
2 amps ind. 28 v dc

Torque: 
1 thru 5 decks  4 in. lbs. max.
6 thru 12 decks  7 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.03 in. max for 1 deck switch
add .35 in. max. for each additional deck 
Weight: 
.13 lb. max. for 1 deck switch
add .03 lb. for each additional deck 
Notes: 
NO. OF POSITIONS:
26: 1 Pole per deck
NONSHORTING CONTACTS:
Break before make
SHORTING CONTACTS:
Make before break
1 pole per deck, 6 positions, may have stops or be continuous rotation. All other switches will have stops.
Add letter "D" to P/N Code for deck identification on single pole construction switches. Letter to be adjacent to common terminals. 

Series A  90° Indexing
Designed to meet or exceed the requirements of MILDTL3786
Same as and interchangeable with 511921 Series
No. of Positions 
4 Positions
1 Pole Per Deck 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
5 amps res. 115 v ac
5 amps res. 28 v dc
2 amps ind. 28 v dc

Torque: 
1 thru 5 decks  4 in. lbs. max.
6 thru 12 decks  6 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.06 in. max for 1 deck switch
add .410 in. max. for each additional deck 
Weight: 
.13 lb. max. for 1 deck switch
add .04 lb. for each additional deck 
Notes: 
NO. OF POSITIONS:
24: 1 Pole per deck
NONSHORTING CONTACTS:
Break before make
SHORTING CONTACTS:
Make before break
1 pole per deck, 4 positions, may have stops or be continuous rotation. All other switches will have stops.
All multipole switches will have common terminals identified A, B, C, etc. Add letter "D" to P/N Code for deck identification on single pole construction switches. Letter to be adjacent to common terminals. 

Series AA  15° Indexing
Designed to meet or exceed the requirements of MILDTL3786
Same as and interchangeable with 61900 Series
No. of Positions 
24 Positions
1 Pole Per Deck
12 Positions
2 Poles Per Deck
8 Positions
3 Poles Per Deck
6 Positions
4 Poles Per Deck
4 Positions
6 Poles Per Deck 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
5 amps res. 115 v ac
3 amps res. 28 v dc
2 amps ind. 28 v dc

Torque: 
1 thru 5 decks  5 in. lbs. max.
6 thru 12 decks  8 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.26 in. max for 1 deck switch
add .375 in. max. for each additional deck 
Weight: 
.39 lb. max. for 1 deck switch
add .07 lb. for each additional deck 
Notes: 
All multipole switches will have common terminals identified A, B, C, etc. Add letter "D" to P/N Code for deck identification on single pole construction switches. Letter to be adjacent to common terminals.
NONSHORTING CONTACTS:
Break before make
SHORTING CONTACTS:
Make before break
1 pole per deck, 24 positions, may have stops or be continuous rotation. All other switches will have stops.
Adjustable Stop Data: Switch must be in Position 1 prior to adjusting stops. Remove rear plate. Install the (2) stop pins in desired positions. Replace rear plate. If continuous rotation is required (I pole/deck only), remove pins and place into side holes for storage 

Series AA  22° Indexing
Designed to meet or exceed the requirements of MILDTL3786
Same as and interchangeable with 31900 Series
No. of Positions 
16 Positions
1 Pole Per Deck
8 Positions
2 Poles Per Deck
4 Positions
4 Poles Per Deck 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
5 amps res. 115 v ac
3 amps res. 28 v dc
2 amps ind. 28 v dc

Torque: 
1 thru 5 decks  5 in. lbs. max.
6 thru 12 decks  8 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.36 in. max for 1 deck switch
add .375 in. max. for each additional deck 
Weight: 
.28 lb. max. for 1 deck switch
add .06 lb. for each additional deck 
Notes: 
All multipole switches will have common terminals identified A, B, C, etc. Add letter "D" to P/N Code for deck identification on single pole construction switches. Letter to be adjacent to common terminal.
NONSHORTING CONTACTS:
Break before make
SHORTING CONTACTS:
Make before break
Adjustable Stop Data:
Switch must be in Position 1 prior to adjusting stops. Remove rear plate. Install the (2) stop pins in desired positions. Replace rear plate. If continuous rotation is required (1 pole/deck only), remove pins and place into side holes for storage.


Series AA  30°, 36°, 45° Indexing
Designed to meet or exceed the requirements of MILDTL3786
No. of Positions 
AA301
12 Positions
1 Pole Per Deck
AA302
6 Positions
2 Poles Per Deck
AA303
4 Positions
3 Poles Per Deck
AA361
10 Positions
1 Poles Per Deck
AA362
5 Positions
2 Poles Per Deck
AA451
8 Positions
1 Pole Per Deck
AA452
4 Positions
2 Poles Per Deck 

AA30
(12 Positions) 
AA36
(10 Positions) 
AA45
(8 Positions) 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
2 amps res. 115 v ac
1 amps res. 28 v dc
.5 amps ind. 28 v dc

5 amps res. 115 v ac
3 amps res. 28 v dc
2 amps ind. 28 v dc 
Torque: 
1 thru 5 decks  3 in. lbs. max.
6 thru 12 decks  5 in. lbs. max. 
1 thru 5 decks  4 in. lbs. max.
6 thru 12 decks  8 in. lbs. max. 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Length: 
1.23 in. max for 1 deck switch
add .35 in. max. for each additional deck 
1.29 in. max for 1 deck switch
add .41 in. max. for each additional deck 
Weight: 
.15 lb. max. for 1 deck switch
add .03 lb. for each additional deck 
.17 lb. max. for 1 deck switch
add .04 lb. for each additional deck 
Notes: 
Poles/Deck:
30 = 1,2 or 3
36 = 1 or 2
45 = 1 or 2
All multiple switches will have common terminals identified A, B, C etc. Add letter 'D' to P/N code for deck identification on single pole construction switches. Letters to be adjacent to common terminals.
Adjustable Stop Data:
Switch must be in position 1 prior to adjusting stops. Remove rear plate. Install the (2) stop pins in desired positions. Replace rear plate. If continuous rotation is required (1 pole/deck only), remove pins and place into side holes for storage.


Series AC  30°, 36°, 45°, 60°, 90° Indexing
Designed to meet or exceed the requirements of MILDTL3786
No. of Positions 
AC30
12 Positions
Max. 30° Index
AC36
10 Positions
Max. 36° index
AC45
8 Positions
Max. 45° Index
AC60
6 Positions
Max. 60° Index
AC90
4 Positions
Max 90° Index 

AC60
(6 Positions)
AC36
(10 Positions) 
AC90
(4 Positions)
AC45
(8 Positions) 
AA30
(12 Positions) 
Electrical Rating: 
Continuous 10 amps at 28 v dc 
Make and Break: (10,000 cycles) 
5 amps res. 115 v ac
3 amps res. 28 v dc
2 amps ind. 28 v dc

5 amps res. 115 v ac
5 amps res. 28 v dc
2.5 amps ind. 28 v dc 
2 amps res. 115 v ac
1 amps res. 28 v dc
.5 amps ind. 28 v dc 
Altitude: 
to 70,000 feet 
Temperature Range: 
65^{o}C to +125^{o}C 
Notes: 
ROTATION TORQUE:
5 in. lbs. max. for AC30, AC36 and AC45 Units
7 in. lbs. for AC60 Units
6 in. lbs. for AC90 Units











