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Douglas Electronic Industries Limited
55 Eastfield Road
Louth
Lincolnshire
LN11 7AL

Tel: 01507 603643
Fax: 01507 600502

info@douglas-transformers.co.uk

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PCB Mounted Transformers

PCB Mounted Transformer

PCB mounted standard range transformers are available in various bobbin sizes from 1.2VA up to 100VA. All bobbins except 1.2VA and 1.5Va size have fully shrouded primary and secondary windings. Four hole laminations for screw mounting to PCB boards are used for 12Va transformers and above. All fine windings are skeined to pins for extra strength. Thermal fuse protection to BS3535 is available for special requirements. The standard bobbin plans and pin layouts listed give the pin numbers used for each VA size and number of primary and secondary taps. Different pin positions can be used according to requirements.

Rating Volts Per Secondary Reference Pin View
1.2VA 4.5-0-4.5 EQ1PC PCB Mounted Transformer 1.2VA Pin View
6-0-6 EQ2PC
12-0-12 EQ3PC
15-0-15 EQ4PC
20-0-20 EQ5PC
1.5VA 0-3,0-3 EMT551PC PCB Mounted Transformer 1.5VA Pin View
0-4.5,0-4.5 EMT561PC
0-6,0-6 EMT534PC
0-7.5,0-7.5 EMT535PC
0-9,0-9 EMT536PC
0-12,0-12 EMT537PC
0-15,0-15 EMT538PC
0-20,0-20 EMT539PC
3VA 0-3 0-3 EMT562PC PCB Mounted Transformer 3VA Pin View
0-4.5,0-4.5 EMT563PC
0-6,0-6 EMT529PC
0-7.5,0-7.5 EMT528PC
0-9,0-9 EMT530PC
0-12,0-12 EMT531PC
0-15,0-15 EMT532PC
0-20,0-20 EMT533PC
6VA 0-4.5,0-4.5 EMT440PC PCB Mounted Transformer 6VA Pin View

0.9" Spacing also available

0-6,0-6 EMT446PC
0-7.5,0-7.5 EMT453PC
0-9,0-9 EMT460PC
0-12,0-12 EMT467PC
0-15,0-15 EMT474PC
0-17.5,0-17.5 EMT481PC
0-20,0-20 EMT488PC
12VA 0-4.5,0-4.5 EMT443PC PCB Mounted Transformer 12VA Pin View
0-6,0-6 EMT449PC
0-7.5,0-7.5 EMT456PC
0-9,0-9 EMT463PC
0-12,0-12 EMT470PC
0-15,0-15 EMT477PC
0-17.5,0-17.5 EMT484PC
0-20,0-20 EMT491PC
0-24,0-24 EMT498PC

25VA

0-4.5,0-4.5 EMT444PC PCB Mounted Transformer 25VA Pin View
0-6,0-6 EMT450PC
0-7.5,0-7.5 EMT457PC
0-9,0-9 EMT464PC
0-12,0-12 EMT471PC
0-15,0-15 EMT478PC
0-17.5,0-17.5 EMT485PC
0-20,0-20 EMT492PC
0-24,0-24 EMT499PC

Dimensions, Weight & Regulations

10 Pin bobbins are used for 1.2, 1.5, 3, 6, 12, 20 and 25VA transformers (6VA Imperial Bobbin)

PCB Mounted Transformer 10 Pin Bobbin Dimensions

Laminations without fixing holes used for 1.2, 1.5, 3 and 6VA (Imperial Bobbin)

 

Laminations with fixing holes used for 12, 20 and 25VA

12 Pin bobbins are used for 6, 9, 50, 60, 75 and 100VA transformers (6VA Metric Bobbin)

PCB Mounted Transformer 12 Pin Bobbin Dimensions

Laminations without fixing holes used for 6VA (Metric Bobbin) and 9VA

 

Laminations with fixing holes used for 50, 60, 75 and 100VA

* High Grade Laminations
Rating Dimensions (mm) Weight (kg) Regulation %
A B C D E F G
1.2VA 30 25 25 5.08 20.32     0.065 18
3VA 38 32 30 5.08 25.4     0.120 20
Metric 6VA 42 35 32 5.08 25.4     0.155 18
Imperial 6VA 43 36 35 5.08 22.86     0.165 18
9VA 48 40 37 5.08 27.5     0.215 15
12VA 58 48 46 7.62 30.5 47.6 38.1 0.400 10
20VA 58 48 52 7.62 30.5 47.6 38.1 0.450 10
25VA 67 56 52 7.62 35.6 55.6 44.5 0.770 10
50VA 77 64 58 7.2 40.7 63.5 50.8 1.000 10
60VA 77 64 64 7.2 40.7 63.5 50.8 1.200 9
75VA 77 64 70 7.2 40.7 63.5 50.8 1.300 8
100VA* 86 72 64 7.2 45.8 71.5 57.2 1.400 8