POWER SUPPLY MODEL 3000

The SCE 3000 series power supply is a small, modular 400Hz AC to DC supply which outputs +12V @ 2.0A.

The unit is conservatively designed and rated with a minimum MTBF of 300,000 hours under Naval, Sheltered conditions at 50ºC per MIL-HDBK-217E. The supply follows the design guidelines in NAVMAT P-4855, and is derated per AS4613 class A.

The supply is equivalent to Abbott Transistor Laboratories W series, with significantly improved performance.

SPECIFICATIONS

Electrical

Input:

• Voltage 105VAC - 135VAC, 350Hz to 450Hz single phase
  Current

Output:

• Voltage +12VDC
• Current 2.0Amp
• Regulation +0.1% line, <+20mV load
• Transient 50% to 100% load step: 3% maximum excursion, with recovery to regulation limits in under 100µsec.
• Ripple 0.2% p-p maximum
• Efficiency >45% at full load over entire input range
• Temperature Coef.    <0.015%/ºC variation over full -55ºC to +90ºC range

Environmental

• Operating Temperatures -54ºC to +90ºC
• Humidity per MIL-STD-810E method 507.3 proc III
• Salt Fog per MIL-STD-810E method 509.3 proc I
• Altitude per MIL-STD-810E method 500.3 proc II
• Shock per MIL-STD-810E method 516.4 proc I,III
• Temp. Shock per MIL-STD-810E method 503.3
• Burn-In   Each supply is subjected to 10 temperature cycles from -54ºC to 70ºC, for a total of 60 hours of testing.
• Vibration  Each unit is vibrated for 10 minutes at 6.3 G’s per NAVMAT P-9492.

Protection Circuits

• Current Limit   Foldback type with automatic recovery, will operate into a short circuit with no damage. Unit will meet tracking specifications during current limit.
• Isolation Input, case and outputs are isolated from each other to 700VDC, with 500M ohms minimum resistance
• EMI Meets MIL-STD-461B Class A1 (airborne equipment)