Rotary Selector Switch Keylocks

Mason Controls’ keylock switches combine multi-position rotary selection with key-operated security, providing authorized access control for sensitive aerospace and defense applications. Available in miniature (AK Series), micro-miniature (BK Series), and high-security (BKS Series) configurations, these keylock rotary switches feature totally enclosed, explosion-proof construction with indexing options from 30° to 90°. Our keylock solutions deliver reliable security and precision control for military aircraft, ground vehicle controls, and industrial systems requiring restricted operation.

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SERIES: AK INDEXING: 30° 36° 45° 60° 90°

Miniature
AK30-1 – 12 Positions: 1 Pole Per Deck
AK30-2 – 6 Positions: 2 Poles Per Deck
AK30-3 – 4 Positions: 3 Poles Per Deck
AK36-1 – 10 Positions: 1 Pole Per Deck
AK36-2 – 5 Positions: 2 Poles Per Deck
AK45-1 – 8 Positions: 1 Pole Per Deck
AK45-2 – 4 Positions: 2 Poles Per Deck
AK60-1 – 6 Positions: 1 Pole Per Deck
AK90-1 – 4 Positions: 1 Pole Per Deck

Designed to meet or exceed the requirements of MIL-S-3786

  1. Poles/Deck:
    1, 2 and 3 - 30°
    1 and 2 - 36° and 45°
    1 only - 60° and 90°
  2. 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. Letters to be adjacent to common terminals.
  3. No. of Positions:
    2-12 - 1 pole/deck (30°)
    2-6 - 2 pole/deck (30°)
    2-4 - 3 pole/deck (30°)
    2-10 - 1 pole/deck (36°)
    2-5 - 2 pole/deck (36°)
    2-8 - 1 pole/deck (45°)
    2-4 - 2 pole/deck (45°)
    2-6 - 1 pole/deck (60°)

SERIES: BK INDEXING: 30° 36° 45° 60° 90°

Micro-Miniature
BK30-1 – 12 Positions: 1 Pole Per Deck
BK30-2 – 6 Positions: 2 Poles Per Deck
BK30-3 – 4 Positions: 3 Poles Per Deck
BK36-1 – 10 Positions: 1 Pole Per Deck
BK36-2 – 5 Positions: 2 Poles Per Deck
BK45-1 – 8 Positions: 1 Pole Per Deck
BK45-2 – 4 Positions: 2 Poles Per Deck
BK60-1 – 6 Positions: 1 Pole Per Deck
BK60-2 – 3 Positions: 2 Poles Per Deck
BK90-1 – 4 Positions: 1 Pole Per Deck
BK90-2 – 2 Positions: 2 Poles Per Deck

Designed to meet or exceed the requirements of MIL-S-3786

Electrical Rating:
Continuous 8 amps at 28 v dc
Make and Break:
(10,000 cycles)
.25 amps res. 115 v ac
.25 amps res. 28 v dc
.12 amps ind. 28 v dc
Torque:
2 inch lbs. max.
Altitude:
to 70,000 feet
Temperature Range:
-65°C to +125°C
Length:
1.50 in. max for 1 deck switch, add .270 in. max. for each additional deck
Weight:
60 grams max. for 1 deck switch, add 3 grams for each additional deck.
  1. No. of Positions:
    2-12 - 1 pole/deck (30°)
    2-6 - 2 pole/deck (30°)
    2-4 - 3 pole/deck (30°)
    2-10 - 1 pole/deck (36°)
    2-5 - 2 pole/deck (36°)
    2-8 - 1 pole/deck (45°)
    2-4 - 2 pole/deck (45°)
    2-6 - 1 pole/deck (60°)
    2-3 - 2 pole/deck (60°)
    2-4 - 1 pole/deck (90°)
    2 - 2 pole/deck (90°)
  2. Non-Shorting Contacts = Break before make
    Shorting Contacts = Make before break
    60° & 90° are non-shorting only
  3. 1 pole per deck. Max positions will be continouous rotation. All others will have stops.
  4. If required decks will be identified A, B, C, etc.

SERIES: BKS INDEXING: 30° 36° 45° 60° 90°

Micro-Miniature High Security BKS30-1 – 12 Positions: 1 Pole Per Deck
BKS30-2 – 6 Positions: 2 Poles Per Deck
BKS30-3 – 4 Positions: 3 Poles Per Deck
BKS36-1 – 10 Positions: 1 Pole Per Deck
BKS36-2 – 5 Positions: 2 Poles Per Deck
BKS45-1 – 8 Positions: 1 Pole Per Deck
BKS45-2 – 4 Positions: 2 Poles Per Deck
BKS60-1 – 6 Positions: 1 Pole Per Deck
BKS60-2 – 3 Positions: 2 Poles Per Deck
BKS90-1 – 4 Positions: 1 Pole Per Deck
BKS90-2 – 2 Positions: 2 Poles Per Deck

Designed to meet or exceed the requirements of MIL-S-3786

Electrical Rating:
Continuous 8 amps at 28 v dc
Make and Break:
(10,000 cycles)
.25 amps res. 115 v ac
.25 amps res. 28 v dc
.12 amps ind. 28 v dc
Torque:
2 inch lbs. max.
Altitude:
to 70,000 feet
Temperature Range:
-65°C to +125°C
Length:
1.96 in. max for 1 deck switch, add .270 in. max. for each additional deck
Weight:
60 grams max. for 1 deck switch, add 3 grams for each additional deck.
  1. No. of Positions:
    2-12 - 1 pole/deck (30°)
    2-6 - 2 pole/deck (30°)
    2-4 - 3 pole/deck (30°)
    2-10 - 1 pole/deck (36°)
    2-5 - 2 pole/deck (36°)
    2-8 - 1 pole/deck (45°)
    2-4 - 2 pole/deck (45°)
    2-6 - 1 pole/deck (60°)
    2-3 - 2 pole/deck (60°)
    2-4 - 1 pole/deck (90°)
    2 - 2 pole/deck (90°)
  2. Non-Shorting Contacts = Break before make
    Shorting Contacts = Make before break
    60° & 90° are non-shorting only
  3. 1 pole per deck. Max positions will be continouous rotation. All others will have stops.
  4. If required decks will be identified A, B, C, etc.

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