BP-20-1

Confirmed electrical data

The preserved data give an allowable input-voltage range of +10% / −15% from nominal. Output voltage is 35 V with a tolerance of ±5% at a load resistance up to 1 kΩ, and maximum power consumption at rated load is 8 W. A procurement record independently lists the BP-20 family as 220 V input, 35 V output, 100 mA and 8 W; the current value is treated as family corroboration, not a suffix-specific replacement rule.

Application and compatibility

The exact aircraft system for BP-20-1 was not identified in the reviewed public documents. It belongs to aircraft avionics power equipment, but should be selected only from the installation documentation. BP-20-1 and BP-20-3 share published electrical values; that alone does not prove connector, mounting or functional interchangeability.

Inspection and ordering

Check the plate, connector, case, mounting and evidence of overheating or moisture. Insulation, no-load output and operation under an approved load should be tested by qualified personnel using the correct circuit. An enquiry should include the complete suffix, equipment or aircraft reference, quantity, condition and passport requirement. Related power units are listed in Electronic Control Units.

BP-20-1 load and acceptance checks

For procurement or bench acceptance, the 35 V output must be checked both without load and at the specified load, while the 220 V input remains within its documented tolerance. Regulation, insulation condition, heating and connector integrity should be recorded. The published similarity with BP-20-3 is useful for comparison only and does not authorize substitution.