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PQ Power Switchmode Transformers

Precision Inc has developed switchmode transformers utilizing industry standard configurations, such as materials and footprints. These "standard" switchmode transformers are designed around a sizing factor number.  To determine which core style will work in your application we offer a Product Family Calculator to assist in the selection. 

If you prefer the PQ style core, the sizing factor Calculator is located below.

Features:
  • High power density/volume
  • Small footprint
  • Good for gapped or ungapped applications

 
Mechanical Characteristics

 

PQ Mechnical Drawing
 * For standard product: Please select the quantity for each item you wish to order or receive a quote and click the 'Add To Quote' button below.

* For custom product: Please click 'Custom' button below. You will be directed to a page where you can add custom product information and attach prints.
 
Model
Length (A)
Width (B)
Height (C)
Pin Spacing (F1)
Pin Row (G)
No. of Pins
Sizing Factor
330Khz-

Sizing Factor
800Khz

PQ3230  32.2 mm
(1.268 in)
34.3 mm
(1.350 in)
36 mm
(1.417 in)
5.08 mm
(.200 in)
30.5 mm
(1.200 in)
12
up to 800
up to 1100
PQ3220  32.2 mm
(1.268 in)
34.3 mm
(1.350 in)
26.2 mm
(1.031 in)
5.08 mm
(.200 in)
30.5 mm
(1.200 in)
12
up to 540
up to 700
PQ2625  26.7 mm
(1.051 in)
29.8 mm
(1.173 in)
30.1 mm
(1.185 in)
3.81 mm
(.150 in)
25.4 mm
(1.000 in)
12
up to 420
up to 580
PQ2620  26.7 mm
(1.051 in)
29.8 mm
(1.173 in)
25.5 mm
(1.004 in)
3.81 mm
(.150 in)
25.4 mm
(1.000 in)
12
up to 380
up to 500
PQ2020  23.2 mm
(.913 in)
23.4 mm
(.921 in)
25.1 mm
(.988 in)
See Figure 1
20.3 mm
(.800 in)
14
up to 210
up to 280
PQ4040  40.1 mm
(1.579 in)
42.1 mm
(1.657 in)
45.1 mm
(1.776 in)
5.08 mm
(.200 in)
38.1 mm
(1.500 in)
12
up to 1500
up to 2200
PQ2016  23.2 mm
(.913 in)
23.4 mm
(.921 in)
21.1 mm
(.831 in)
See Figure 1
20.3 mm
(.800 in)
14
up to 150
up to 210
PQ3535  35.1 mm
(1.382 in)
39.7 mm
(1.563 in)
40.3 mm
(1.587 in)
5.08 mm
(.200 in)
35.6 mm
(1.400 in)
12
up to 1100
up to 1500
Displaying 1 to 8 (of 8 products) Result Pages:  1 
Custom
Sizing Factor Calculator

 

PQ Sizing Factor

Once the core has been selected please contact our design engineers to assist with the transformer design and manufacturability issues such as; turns ratio, dielectric, wire breakout, pin termination, IEC margins, Rohs, REACH and other construction related requirements.

Sizing factor notes that apply to the chart above:

  1. Sizing constraints: Temperature rise is 40°C, the ambient temperature is 50°C and it does not include IEC Spacing.
  2. Increasing the operational frequency will reduce the sizing factor number and transformer size.
  3. Increasing the temperature rise allowed in the part will reduce sizing factor number and transformer size.
  4. Adding IEC dielectric requirements will increase the sizing factor number and transformer size.
 

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