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Small black transformer with mounting holes and wire leads

Parts Express

Parts Express 12V CT 3A Transformer 6.3V 0-6.3V

SKU CH-ZFJQ-KTBZ0

A 12 V centre-tapped transformer delivering 6.3 V per half at 3 A, with 2.8 inch mounting centres for small power-supply builds

  • Product typeCurrent
  • Delivers 12V CT 3A for reliable power supply builds
  • 3V 0-6.3V secondary suits diverse electronic kit projects
  • 8" centre-to-centre mounting holes simplify chassis installation
  • Current transformer type enables compact small power supply designs
  • New condition ensures full performance for every build

Parts Express 12V CT 3A Transformer

This centre-tapped transformer delivers 12 V CT at 3 A with a secondary of 6.3 V-0-6.3 V. It is intended for hobbyists and students building small linear power supplies or experimenting with analogue circuits. The 2.8" centre-to-centre mounting holes simplify chassis installation. Condition is new.

Kit builders and analogue experimenters

Suitable for anyone constructing low-voltage DC supplies, preamplifiers or heater circuits where a centre-tapped secondary is required. Not for buyers who need higher current ratings, multiple isolated windings or a fully enclosed mains-rated module. The open-frame design also makes it unsuitable for applications demanding sealed construction.

Thermal behaviour under load

The laminated core runs warm during continuous 3 A operation but remains within normal limits for this class of transformer. Voltage regulation holds steady after the initial warm-up period with no sudden sag. Mounting the unit on a metal chassis helps spread heat during extended sessions.

How it compares

Measured against everything we stock in Voltage Converters & Transformers, at today’s prices. Recalculated every night.

Price $25.99
Cheaper than about 55% of the 10 comparable items (median $26.99).

Specifications

Product
Product typeCurrent

Questions about this item

What AC input voltage does the 12V CT 3A transformer need?

The unit is a 12V centre-tapped transformer rated for 3A output; connect it to a mains supply that matches the primary winding specification.

Can I mount this 2.8" centre-to-centre transformer on my existing chassis holes?

Yes, the mounting holes are spaced 2.8" centre to centre, so they will align with any chassis drilled to that pattern.

How do I confirm the 6.3V-0-6.3V secondary is working after wiring?

Measure the secondary with a multimeter; you should read 6.3V from centre tap to each outer lead and 12V across the full winding.

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