EI Transformer Dimensions Chart：Size vs. Power Rating Comparison
May 02,2025 | nretec
EI-Series Power Transformers
High-quality power transformers designed for HVAC systems, control panels, and various electrical applications. All models feature excellent voltage regulation and comply with international safety standards.
| Model | Input Voltage | Operating Frequency | Power | Voltage Regulation (%) | Lamination Standard | Approval |
|---|---|---|---|---|---|---|
| PT-EI28-XXX-Y | 100V 120V 220V 230V 240V |
50Hz 60Hz |
1.5VA | 35 | EI-28 | CE TüV CQC UL |
| PT-EI35-XXX-Y | 3VA | 22 | EI-35 | CE TüV CQC UL | ||
| PT-EI41-XXX-Y | 11VA | 16.5 | EI-41 | CE TüV CQC UL | ||
| PT-EI48-XXX-Y | 25VA | 13.1 | EI-48 | CE TüV CQC UL | ||
| PT-EI57-XXX-Y | 40VA | 11.8 | EI-57 | CE TüV CQC UL | ||
| PT-EI66-XXX-Y | 86VA | 9.3 | EI-66 | CE TüV CQC UL | ||
| PT-EI76-XXX-Y | 140VA | 7.6 | EI-76 | CE TüV CQC UL | ||
| PT-EI86-XXX-Y | 180VA | 7.1 | EI-86 | CE TüV CQC UL | ||
| PT-EI96-XXX-Y | 250VA | 6 | EI-96 | CE TüV CQC UL | ||
| PT-EI105-XXX-Y | 300VA | 6 | EI-105 | CE UL | ||
| PT-EI114-XXX-Y | 400VA | 6 | EI-114 | CE UL | ||
| PT-EI133-XXX-Y | 600VA | 6 | EI-133 | CE UL |
Note: XXX represents Output Power; Y represents Output Winding
Technical Specifications
Input Voltage Options
All transformer models are available with multiple input voltage options: 100V, 120V, 220V, 230V, and 240V, making them suitable for global applications.
Operating Frequency
Compatible with both 50Hz and 60Hz power systems, ensuring worldwide compatibility.
Voltage Regulation
Voltage regulation performance improves as power rating increases, with values ranging from 35% for the smallest model to 6% for larger models.
Certifications
All models are CE certified and UL listed, with most models also having TüV and CQC certifications, ensuring compliance with international safety standards.
Applications
- HVAC systems and air conditioning units
- Control panels and industrial automation
- Power supplies for electronic equipment
- Lighting systems and LED drivers
- Security and alarm systems
- Telecommunications equipment
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