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TDK Lambda SWS300-3 300W 3.3V 55A closed-frame PSU, metal chassis, screw terminals, 7.80 x 2.05 x 4.01 in

TDK Corporation

TDK Corporation SWS300-3 300W 3.3V 55A power supply

SKU CH-EYM8-5GKQP MPN SWS300-3

A 300 W enclosed switching supply delivering 3.3 V at 55 A from an 85–265 VAC input, chassis-mountable in a 7.80" × 2.05" × 4.01" frame

  • Delivers stable 3.3 VDC at up to 55 A output current
  • Accepts global AC input from 85 to 265 VAC for worldwide use
  • Provides 300 W continuous power in a single-output design
  • Closed-frame switching topology ensures efficient, regulated DC conversion
  • Compact chassis-mount footprint at 7.80" L x 2.05" W x 4.01" H

Closed-frame 300 W unit for embedded systems

This TDK-Lambda SWS300-3 delivers a single 3.3 V rail rated at 55 A for a total of 300 W. It accepts a wide 85-265 VAC input, making it suitable for industrial equipment and chassis-mount installations worldwide.

Capacity and headroom at 3.3 V

The 55 A maximum provides ample headroom for dense logic boards and peripheral arrays that draw steady current. Loads approaching the full 300 W will saturate the rail, so systems requiring multiple voltage domains or higher peak power need additional supplies.

Thermals noise and power draw

The closed-frame construction relies on system airflow rather than an integrated fan, so acoustic output depends entirely on the host enclosure. Conduction through the chassis mount helps dissipate heat, but sustained 300 W operation requires adequate ventilation in the mounting cavity.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $75.99
Cheaper than about 77% of the 10,869 comparable items (median $142.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Will the 3.3 V, 55 A output run legacy 3.3 V logic boards I already own?

The single output delivers 3.3 VDC at up to 55 A, so any 3.3 V load within that current limit can be powered.

How can I verify the unit is operating correctly once installed?

Measure the output with a multimeter; it should read 3.3 VDC under load up to 55 A.

What comes in the box and what must I source separately?

The supply itself is included; AC input cables, output wiring, and mounting hardware are not supplied.

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