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PQ Power Switchmode Transformers
This spec sheet is available in printable format.

Click here to fill out a RFQ form

PQ Photo Features:

  • High power density/volume
  • Small footprint
  • Good for gapped or ungapped applications
  • Less ideal for applications involving IEC

Preferred Parts:

  • PQSPXXXX are preferred (side pin configuration gives best reliability and manufacturability).

How to choose your model:

  • Use the “sizing factor” previously calculated and the frequency to locate a point on the chart.
  • Choose the model # whose line is above the located point.
  • Note: During the design process, the actual sizing factor may vary from the assumptions used here.

PQ Style graph


Precision
Model Number		 Figure
Number		  

A
MAX

B
MAX 		C
MAX 		D
DIA MAX		 E
MIN		 F1
NOM		 F2
NOM		 G
NOM 		H
NOM		 J
NOM		 K
NOM		 M
NOM		 N
NOM
PQSP2016 1 mm 23.2 30.2 21.1 0.9 2.5 3.81 2.54 20.3 5.08 6.4 20.8 1.5 0.305
    in 0.913 1.189 0.831 0.035 0.098 0.15 0.1 0.8 0.2 0.252 0.82 0.059 0.012
PQSP2020 1 mm 23.2 30.2 25.1 0.9 2.5 3.81 2.54 20.3 5.08 6.4 20.8 1.5 0.305
    in 0.913 1.189 0.988 0.035 0.098 0.15 0.1 0.8 0.2 0.252 0.82 0.059 0.012
PQSP2620 2 mm 26.7 36.5 25.5 1.06 2.5 3.81 _ 25.4 7.62 9 26.8 1.5 0.305
    in 1.051 1.437 1.004 0.042 0.098 0.15 1 0.3 0.354 1.06 0.059 0.012  
PQSP2625 2 mm 26.7 36.5 30.1 1.06 2.5 3.81 _ 25.4 7.62 9 26.8 1.5 0.305
    in 1.051 1.437 1.185 0.042 0.098 0.15 1 0.3 0.354 1.06 0.059 0.012  
PQSP3220 2 mm 32.2 41.9 26.2 1.11 2.5 5.08 _ 30.5 7.62 10.6 32.4 1.7 0.432
    in 1.268 1.65 1.031 0.044 0.098 0.2 1.2 0.3 0.417 1.28 0.067 0.017  
PQSP3230 2 mm 32.2 41.9 36 1.11 2.5 5.08 _ 30.5 7.62 10.6 32.4 1.7 0.432
    in 1.268 1.65 1.417 0.044 0.098 0.2 1.2 0.3 0.417 1.28 0.067 0.017  
PQSP3535 2 mm 35.1 43.1 40.3 1.06 2.5 5.08 _ 35.6 10.2 11.3 35.5 1.7 0.432
    in 1.382 1.697 1.587 0.042 0.098 0.2 1.4 0.4 0.445 1.4 0.067 0.017  
PQSP4040 2 mm 40.1 45.6 45.1 1.06 2.5 5.08 _ 38.1 15.2 11.8 40.9 1.7 0.432
    in 1.579 1.795 1.776 0.042 0.098 0.2 1.5 0.6 0.464 1.61 0.067 0.017  

Precision
Model Number		 Figure
Number		  

A
MAX

B
MAX 		C
MAX 		D
DIA MAX		 E
MIN		 F1
NOM		 F2
NOM		 G
NOM 		H
NOM		 J
NOM		 K
NOM		 M
NOM		 N
NOM
PQ2016 3 mm 23.2 23.4 21.1 0.9 2.5 3.81 2.54 20.3 5.08 6.4 20.8 1.5 0.305
    in 0.913 0.921 0.831 0.035 0.098 0.15 0.1 0.8 0.2 0.252 0.82 0.059 0.012
PQ2020 3 mm 23.2 23.4 25.1 0.9 2.5 3.81 2.54 20.3 5.08 6.4 20.8 1.5 0.305
    in 0.913 0.921 0.988 0.035 0.098 0.15 0.1 0.8 0.2 0.252 0.82 0.059 0.012
PQ2620 4 mm 26.7 29.8 25.5 1.06 2.5 3.81 _ 25.4 7.62 9 26.8 1.5 0.305
    in 1.051 1.173 1.004 0.042 0.098 0.15 1 0.3 0.354 1.06 0.059 0.012  
PQ2625 4 mm 26.7 29.8 30.1 1.06 2.5 3.81 _ 25.4 7.62 9 26.8 1.5 0.305
    in 1.051 1.173 1.185 0.042 0.098 0.15 1 0.3 0.354 1.06 0.059 0.012  
PQ3220 4 mm 32.2 34.3 26.2 1.11 2.5 5.08 _ 30.5 7.62 10.6 32.4 1.7 0.432
    in 1.268 1.35 1.031 0.044 0.098 0.2 1.2 0.3 0.417 1.28 0.067 0.017  
PQ3230 4 mm 32.2 34.3 36 1.11 2.5 5.08 _ 30.5 7.62 10.6 32.4 1.7 0.432
    in 1.268 1.35 1.417 0.044 0.098 0.2 1.2 0.3 0.417 1.28 0.067 0.017  
PQ3535 4 mm 35.1 39.7 40.3 1.06 2.5 5.08 _ 35.6 10.2 11.3 35.5 1.7 0.432
    in 1.382 1.563 1.587 0.042 0.098 0.2 1.4 0.4 0.445 1.4 0.067 0.017  
PQ4040 4 mm 40.1 42.1 45.1 1.06 2.5 5.08 _ 38.1 15.2 11.8 40.9 1.7 0.432
    in 1.579 1.657 1.776 0.042 0.098 0.2 1.5 0.6 0.464 1.61 0.067 0.017