• Excellent surge and transient protection
• Externally adjustable output voltage
• Extremely low inrush current, hot-swappable
• Class I equipment
• All PCBs coated with protective lacquer

Article number	DP3020-9R
Available stock	6
Manufacturer	Bel Power
Type	DC/DC
Input Voltage	40-101VDC
Output voltage 1	5.1V
Output current 1	17.6A
Output voltage 2	12V
Output current 2	4A
Output voltage 3	12V
Output current 3	4A
Total power	121W
Peak power	187W
Op. temperature	-40 / 71°C
Size	164x111x19.8 mm
Weight	500g
Efficiency	87%
Formfactor	Casette
Application	Industry
Specials	Class I, hot-swappable, slim case, EN62368

These extremely compact DC-DC converters incorporate all necessary input and output filters, signaling and protection features, which are required in the majority of applications. The converters provide important advantages, such as flexible output power through primary-side current limitation, extremely high efficiency, excellent reliability, very low ripple and RFI noise levels, full input-to-output isolation, negligible inrush current, soft start, overtemperature protection and input over- and undervoltage lockout.
The converters are particularly suitable for rugged environments, such as railway applications. They have been designed in accordance with the European railway standards EN 50155 and EN 50121-3-2. All printed circuit boards are coated with a protective lacquer. The converter inputs are protected against surges and transients occurring on the source lines and cover a total operating input voltage range from 16 to 150 VDC with five different model types. The outputs are continuously open- and short-circuit proof.
Full system flexibility and n+1 redundant operating mode are possible due to series or parallel connection capabilities of the outputs under the specified conditions. When several converters (with 3.3 and 5.1 V outputs) are connected in parallel, the T option allows for a single-wire connection between the converters to ensure good current sharing. LEDs at the front panel and an isolated Out-OK signal (option) indicate the status of the converter. Voltage suppressor diodes and an independent second control loop protect the
outputs against an internally generated over voltage.
The converters are designed using planar magnetics transformers and control circuits in hybrid technology. There are always two powertrains fitted to a converter, each consisting either of a regulated single output with synchronous rectifier or of a regulated main output with a tracking second output. The output power may be flexibly distributed among the main and the tracking output of each powertrain. Close magnetic coupling in the transformers and output conductors together with circuit symmetry ensure tight tracking
of the auxiliary output. The switching frequency is fixed.
As a modular power supply or as part of a distributed power supply system, the low-profile design significantly reduces the required volume without sacrificing high reliability. The converters are particularly suitable for 19″ rack systems occupying 3U/4TE only, but they can also be chassis-mounted by means of four screws. Connector type is H15 (or H15S2 for some single-output models). The fully enclosed black-coated aluminum case acts as heat sink and RFI shield and protects the converter together with the coating of all components against environmental impacts.