Custom EI Laminated & Control Transformers
EI laminated transformers are the rugged, cost-effective workhorse for industrial power, control and general-purpose equipment. P&A International engineers, prototypes and delivers custom EI transformers — control, isolation, power and PCB-mount types, a few VA to multi-kVA, 50/60 Hz — built to your voltages, taps, insulation class and mounting.
As an engineering-led contract manufacturer founded as an engineering consultancy, we assign one dedicated engineer to your project from design review to qualified samples in 10–15 working days, then scale into volume through our vetted partner-factory network, where every supplier is ISO 9000 certified or better.Request a quote ›
consultancy + manufacture
per project, end-to-end
qualified samples with test data
every supplier certified or better
one-off to high volume
Why choose PA EI transformers
Rugged & reliable
Robust laminated-core construction stands up to industrial vibration, surge and continuous duty.
Flexible windings
Multiple taps, outputs, voltage selection and electrostatic screens designed to your spec.
Safe isolation
Reinforced or screened construction with creepage/clearance to IEC 61558 / EN 61558, CE and UL.
Cost-effective
An economical core format with target-cost DFM — the right choice for high-volume power and control.
Engineering capability
- Magnetic design & simulation — turns ratio, regulation, flux density, temperature rise
- Lamination grade & bobbin selection for efficiency, cost and repeatability
- Multi-tap, multi-output and voltage-selectable designs; electrostatic screens
- Safety construction — reinforced or screened isolation to IEC 61558 and EN 61558
- Open-frame, chassis-mount, PCB-mount and encapsulated builds
- DFM review to hit target cost while preserving performance
- Qualified samples with full test data before any volume tooling
- One dedicated engineer owns the project end-to-end
At a glance
| Type | EI laminated — control / isolation / power / PCB |
| Power | A few VA – multi-kVA |
| Frequency | 50 / 60 Hz line frequency |
| Windings | Single & multi-output, taps, screens |
| Isolation | To CE / UL / IEC 61558; reinforced available |
| Mounting | Open-frame, chassis, PCB, potted |
| Prototype | 10–15 working days to qualified samples |
| Quality | Every supplier in our network is ISO 9000 certified or better |
Why engineers & buyers choose PA
For design engineers
A true design partner — one dedicated engineer, full magnetic simulation and DFM support, rapid samples, and EI transformers optimised for regulation, temperature rise and cost. We design to your voltage, insulation class and mounting — not just catalogue parts.
For purchasing
Low-risk scalability — predictable 10–15-day prototypes, flexible MOQ from one-off to production, target-cost DFM, a single point of contact, and a vetted ISO 9000+ partner network managed end-to-end by P&A. No hand-offs, no surprises.
3 easy steps to get started
Send us your spec
Send your drawing or spec sheet. One dedicated engineer reviews it and confirms the technical details with you.
Proposed design & quote
You receive a proposed design and indicative pricing — typically within 48 hours — to review and refine together.
Samples & production
Qualified samples with full test data in 10–15 working days; on approval we scale into volume through our partner network.
Applications
Industrial control & automation · machine tools and panels · power supplies · lighting · building services · test equipment · general power and isolation.
Explore related types: low-frequency & power transformers, toroidal and three-phase transformers.
Choosing the right EI transformer
A few decisions shape every EI design — sharing this detail lets us quote and prototype faster:
| Voltage & taps | Primary/secondary voltages, tap range and voltage-selection options set the turns ratio, copper size and core. |
| Regulation & rating | Load regulation and continuous VA rating drive core size and copper; tighter regulation means a larger core. |
| Temperature rise | Core and copper loss set the insulation class (A/E/B/F/H); lamination grade and build keep it inside your thermal limit. |
| Isolation & safety | Creepage/clearance, screens and compliance to IEC 61558 / EN 61558, CE and UL are designed in from the start. |
| Mounting | Open-frame, chassis, PCB-mount, flying-lead or encapsulated to suit your enclosure and assembly. |
What to send us for a fast, accurate quote
The more of this you can share, the quicker we can return a proposed design and price:
- Primary and secondary voltages, VA rating, taps and number of outputs
- Voltage-selection / multi-tap requirements and any screen
- Load regulation and duty cycle
- Isolation and safety requirements, and target standards
- Mechanical envelope — size, mounting, terminations — and thermal limits
- Target cost and annual volume or call-off pattern
- Any reference design, competitor part number or physical sample
Working from a competitor part or a sample is fine — our engineer will reverse-engineer it or design a drop-in equivalent to your specification.
📄 Download the EI / control transformer RFQ checklist & selection quick reference (PDF)
Get a quote
Send your voltages, VA rating, spec sheet or sample and one dedicated engineer will reply — typically within 48 hours — with a proposed design and indicative pricing. No project too big or too small.
One dedicated engineer reviews every enquiry and replies with a proposed design and indicative pricing. Your details are used only to respond to your enquiry. Prefer email? support@pa-international.com.au