Switchcraft - 12B - Chassis mount stereo socket.
1/4" Stereo 3 Conductor Jack w/Nut & Washer, Double Open Circuit.
MECHANICAL
Life: Commercial Jacks - 10,000 insertion/withdrawal cycles, minimum. Military Jacks - 20,000 insertions/withdrawals, minimum.
Mechanical Shock: Military Jacks - Per MIL-STD 202, method 213, Test Condition H (75g).
Vibration: Military Jacks - Per MIL-STD-202, method 213, (10-55 Hz).
Insertion/Withdrawal Forces: (see charts below)
|
Commercial Jacks |
||
| Plug Diameter (inches) | .210 | .250 |
| Insertion (maximum) | 7 lb. | 7 lb. |
| Withdrawal (minimum) | 1 lb. | 1 lb. |
ELECTRICAL
Contact Resistance: Commercial Jacks - .030 ohms maximum (initial), .050 ohms maximum (after humidity, durability exposure). Per MIL-STD-202E. Military Jacks - .010 ohms maximum (initial), .020 ohms maximum (after life), .10 ohms maximum (after salt spray).
Insulation Resistance: Commercial Jacks - 10,000 M(omega) minimum (initial), 1,000 M(omega) minimum (after humidity). Military Jacks - 10,000 M(omega) minimum (initial), 1,000 M(omega) minimum (after humidity, durability exposure).
Dielectric Withstanding Voltage: 500 V, 60 Hz (rms) AC.
Contact Rating: 1 A, 25 V DC.
ENVIRONMENTAL
Thermal Range: Commercial Jacks; -55°C to +85°C (non-operating); -20°C to +65°C (operating). Military Jacks; -55 °C to +85°C (non-operating); -40°C to +65°C (operating).
Thermal Shock: Commercial Jacks - Per MIL-STD 202, method 107. Military Jacks - Per MIL-STD 202, method 107.
Humidity: Commercial Jacks - Per MIL-STD 202, method 106. Military Jacks - 0% to 95% operating and non-operating.
Salt Spray: Commercial Jacks - Per MIL-STD 202, method 101. Military Jacks - Per MIL-STD 202, method 101 (48 hours).
Moisture Resistance: Military Jacks - Per MIL-STD 202, method 106 (240 hours).
MATERIAL
Mounting Bushing: Nickel-plated copper alloy.
Insulation: Rigid plastic.
Springs: Special copper alloy. Integral contacts are standard in the isolated switching circuits; fine silver contacts in C12A switching circuit.
Sleeve Terminal: Copper alloy.
Hardware: Supplied with one Number P10001 copper alloy nickel-plated hex nut, and one Number S1022 steel nickel-plated washer - except copper alloy nickel-plated
washer Number S10451 supplied on C11, C12A and C12B.
* Commercial jacks feature integral contacts. Integral contacts should not be used where low contact resistance is a requirement.
