PST21A

Page 11 of 13

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These converters are components, intended exclusively for integra�on

into other equipment by an industrial assembly process or by a profes-

sionally competent person. Installa�on must strictly follow the safety

regula�ons in respect of the enclosure, moun�ng, creepage and clea-

rance distances, markings of the end-use applica�on.

Connec�on to the system shall be made via the male connector

Wurth.

The AC/L is internally fused. This fuse is designed to protect the con-

verter against overcurrent caused by a failure, but may not be able

to sa�sfy all requirements. External fuses in the wiring circuit to one

or both input pins may be necessary to ensure compliance with local

requirements.

Do not open the PSU, or the warranty will be invalidated. Make sure

that there is sufficient thermal baseplate dissipa�on (max. temperature

: 100°C). This should be verified by measuring the case of temperature

at the specified measuring point, when the converter is operated in the

end-use applica�on.

Cleaning Agents and Process

The converters are not herme�cally sealed. In order to avoid possible

damage, any penetra�on of liquids shall be avoided.

Isola�on

The electric strength test is performed in the factory in accordance with

IEC/EN 60950.

Standards and Approvals

The converters are built to meet the safety standards IEC 60950-1, EN

60950-1.

‘Built to meet’ men�onned in the different paragraphs of the datasheet

means that Power System Technology has designed the product to

meet the standard but not cer�fied it in a laboratory.

‘Qualified’ means that the test has been made in a cer�fied laboratory.

Electric Strength

Design strength

1500

3000

500

Vrms

> 100

>100

Mohms

Insulation resistance

Characteristic

Output to

Output

Unit

Electric

strength

Factory test for production

units (>10s)

2000

2000

500

Vdc

Input to Earth

Input to

Output

Output to

Earth

Temperatures

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Reliability

MIL-HDBK-217F, notice 2

Model

Heatsink Temp.

GB

GF

40°C

285000

165000

70°C

139500

82300

100°C

86600

51000

MTBF ( Hours)

PST21A 3 outputs

Safety & Installa�on

In opera�on, there is no power dera�ng as long as the baseplate temperature is in the below indacated range.

MTBF calcula�on for a specific part number has to be ordered.