A-A-52525 Horns And Buzzers, Air-And Electrically-ActuatedThis CID covers horns and buzzers used in 12- or 24-volt (V) direct current (dc) circuits as warning signals in tactical vehicles, combat vehicles, and other equipment operating under severe and extreme conditions of shock, vibration, and climate.

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A-A-52525A

NOTES: 1. Dimensions are in millimeters.

2. Unless otherwise specified, tolerances are +0.1 mm, +1°, and +0.4 mm for rubber products.

3. Material

(a) Shell: Rubber, Grade SC615, A1 C1 E3 F2, in accordance with ASTM D2000.

(b) Terminal: Brass, Unified Numbering System (UNS) No. C26000-C28000, C33000- C34200, C35000-C36000, C37000, or C46400-C48500, temper halfhard minimum.

4. Protective Finish: Terminal shall be silver plated to a minimum thickness of 0.006 mm in accordance with ASTM B700, Type I, II, or III, Grade D, Class S.

5. When conductors are coupled, the voltage drop shall not exceed 20 +1 millivolt when operated in a 28 V dc circuit.

FIGURE 5. Connector.