SOWTER AUDIO TRANSFORMERS
MAINS TRANSFORMERS

STANDARD OR CUSTOM MAINS TRANSFORMERS?

The list below shows standard designs of transformers which we have supplied in the past and these can be repeated. Generally however customers prefer to specify a custom design. The price depends on the size code letter For size information see Package Options. There is no extra charge for a custom design.

To order standard mains transformers please note the TYPE NUMBER and contact sales. We will make It possible to order using our online shop as soon as we can.

To order a custom design please submit your specification using the link: Custom Mains. We will send you a firm quotation and a design reference so you can order from our webshop.

Our mains transformers use M6 cores to ensure minimum loss and good regulation. Regulation is typically 5% or better and is compensated so that the specified voltage is correct at the stated load current. For help to calculate HT voltages and currents for various filter and rectifier circuits see How to Specify HT Windings

We offer two standard primary options:

  • European type: 240, 220, 200, 0, -10 volts taps.
  • World-Wide type: Two separate windings with 120, 110, 0 volts taps. To be used in series or parallel.
  • Non standard primary windings are also possible

We offer these transformers in three package styles, and optional hum band.  If you request an internal electrostatic shield the size may have to be increased.

MAINS TRANSFORMERS
Note: Voltages and currents are AC RMS values. *=Centre tapped
CLICK HERE FOR DIMENSIONS
  HT SECY 1 SECY 2 SECY 3 SIZE
TYPE Volt Amp Volt Amp Volt Amp Volt Amp  
M001 200 0.01 6.3 1         B
M002 225 0.2 6.3* 5 12 3     L
M003 240 0.3 6.3 4.5         L
M004 250 0.75 6.3* 2         N
M005 280 0.24 6.3* 3         L
M006 250 0.05 13 1.5         F
M007 290* 0.07 6.3 1.5 28 1.5     L
M008 300* 0.01 6.3 10 6.3 10     M
M009 320 0.5 6.3 8         N
M010 320 0.5 6.3* 8 50 0.02     N
M011 325 0.43 20 2.3         N
M012 330 0.43 6.3* 4 6.3* 4     N
M013 325 0.15 6.3* 4 6.3* 1 40 0.04 L
M014 330 0.5 6.3 5 6.3 5 60 0.1 P
M015 340* 0.35 6.3 4.5 21* 1 97 0.05 N
M016 350 0.35 6.3* 3 6.3* 3 12 1.5 N
M017 350 0.9 6.3* 6 6.3* 6 15* 0.5 Q
M018 360* 0.35 6.3* 6 6.3 1 100 0.02 N
M019 360 0.16 6.3 5         L
M020 360 0.25 13 1.5 13 1.5     M
M021 380 0.55 6.3* 4 6.3* 4     P
M022 450* 0.1 6.3 2 6.3 2 12* 1 L
M023 500* 0.1 13* 1         L
M024 500* 0.11 6.3* 4.2         L
M025 500 0.25 6.3 4 30* 1     N
M026 500* 0.01 6.3 1.5         D
M027 500* 0.08 4 4 4* 2.5     L
M028 500* 0.2 6.3 5 5 2     M
M029 530* 0.6 9 3         P
M030 540* 0.03 6.3* 2 5 2     I
M031 520* 0.12 6.3* 5         L
M032 550* 0.2 6.3* 5         M
M033 560* 0.2 6.3 3         M
M034 570* 0.07 6.3 1.5 4 2.3 4 0.65 L
M035 600* 0.15 6.3* 3 6.3* 2 6.3* 1 M
M036 600* 0.15 6.3* 3         L
M037 600* 0.075 6.3 1 6.3 1 4 1 L
M038 600* 0.25 6.3* 5 6.3* 2 5 3 N
M039 620* 0.25 6.3* 4         N
M040 625 0.05 6.3 1.9 4 1     H
M041 640* 0.32 6.3* 5 40 0.01     P
M042 650* 0.15 12.6* 6         M
M043 650 0.33 6.3* 5 6.3 1 250 0.04 P
M044 650* 0.4 6.3* 9.6 13 3     Q
M045 660* 0.4 6.3 8 45 0.1     P
M046 670* 0.02 10.5 1         F
M047 700* 0.18 6.3 4 6.3 2.5 5 3 N
M048 700* 0.13 4* 3 4 2.5 6.4 5 M
M049 700* 0.1 6.3* 2.5 150 0.01     L
M050 700* 0.16 6.3* 6 5 2     N
M051 700* 0.2 6.3* 2.5 6.3* 2.5 70 0.05 N
M052 720* 0.075 6.3 1 13 1.5     L
M053 740* 0.3 6.3* 4.5 65 0.02     P
M054 750* 0.15 6.3* 3.6         M
M055 750* 0.2 6.3* 5 5 3     N
M056 750* 0.5 6.3* 4 6.3* 4     Q
M057 780* 0.4 6.3 5 50 0.02     P
M058 800* 0.2 6.3 3         N
M059 800* 0.2 6.3* 5 5 2     N
M060 800* 0.35 6.3 6 75 0.015     P
M061 820* 0.18 6.3* 4 6.3* 2.5 5 3 N
M062 820* 0.4 6.3 10         P
M063 840* 0.42 6.3* 7 6.3* 2.5 30* 1.5 Q
M064 840* 0.35 6.3 5 5 4     Q
M065 850* 0.15 6.3* 4 5 3     N
M066 850* 0.2 6.3* 3 6.3* 4 5 3 P
M067 850* 0.15 6.3* 4 48* 0.5     N
M068 850* 0.3 6.3* 4 6.3* 4 80 0.015 P
M069 850* 0.5 6.3 4 6.3 4 5.2 2 Q
M070 1000* 0.25 6.3* 5 6.3* 2 5 3 P
M071 1300* 0.325 6.3* 5 4 7 75 0.01 Q
M072 1500* 0.15 6.3* 3.5         P