300 Watt Transient Protection: LGDS-300

300W Transient protection LGDS-300

Dimensions : 40.3 x 26.3 x 12.8 mm

Hi-Rel Models :

LGDS-300 Datasheet



• Ultra compact limitor module, up to 300W
• Transient suppressor module 100V compliant with
     - MIL-STD-1275A/B/C/D,
• Transient suppressor module 80V compliant with
     - MIL-STD-704A/D/E/F
     - DO160C/D/E/F/G
• Inrush current limitation


The Gaia Converter transient suppressor LGDS-300 is an ultra-compact front-end power module designed to allow operation during voltage transients and spikes, occurring in avionics or military systems. The LGDS-300 delivers an output voltage adapted to Gaia Converter DC/DC modules. This module is optimized to provide high power efficiency up to 98%.


Gaia's LGDS-300 High-Reliability Transient suppressor is designed for higher operating temperatures of -40 to +105°C (optional -55°C) for typical military & airborne applications:


Available Options (see specs for details):
• T = -55°C Start-Up Temperature
• S = Screening & Serialization

Modes of Operation

The LGDS-300 features 3 modes of operations as follows:

Normal operation: Normal operation occurs when the input voltage is within the permanent range (9-42V) . The LGDS-300 is then operating in steady transparency state.

Transient operation: The LGDS-300 clamps input transient up to 80V/100ms or 100V/50ms and keeps its output at ~42V max.
The LGDS-300 series is compliant with the international input bus standards :

- MIL-STD-704A/D/E/F
- AECMA EN2282
- GAM-EG13B/AIR2021E
- DO160C/D/E/F/G
- MIL-STD-1275A/B/C

Power fail operation: When a failure occurs such as an under-voltage, an over current or an over temperature, the LGDS-300 turns to power fail mode and stops operation until the failure is removed. The LGDS-300 features 3 protection functions : input under-voltage lockout (UVLO), output over current protection (OCP) and over temperature protection (OTP).

3D/ Step

Mechanical Drawings, 3D/Step files:

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