Encapsulated Transformer: EI30 PCB Transformer with Dual Output

At Unicreed, we produce an Encapsulated Transformer for PCB power supplies and electronic control boards. The model shown is an EI30 encapsulated transformer with a 230 V primary and a 4 V / 12 V dual secondary. The rated power is 0.34 VA and 0.84 VA, and the frequency is 50/60 Hz. The transformer is sealed in an epoxy body and mounted on a PCB. It is part of our encapsulated transformer range, which also includes EI48 and EI28 models.

A Sealed PCB Transformer

An encapsulated transformer has its core and windings sealed in a resin body. The seal protects the winding from moisture, dust and handling damage, and it helps reduce noise. The part is mounted on a PCB through pins, so it can be placed close to the circuit it supplies. The sealed body also gives a clean appearance and a stable shape for automated assembly.

The transformer should be selected for the input voltage, the output voltage, the load and the footprint. The buyer should confirm the pin layout, the body size and the isolation requirement. A part that is too tall may not fit the enclosure, and a part with the wrong pin spacing will not fit the board. A sample should be checked on the PCB before the production order.

Electrical Specifications

The EI30 model has a 230 V primary and a dual 4 V / 12 V secondary. The rated power is 0.34 VA and 0.84 VA. The dielectric strength is 4200 Vrms, and the transformer is tested 100% before packing. The ambient temperature class is Ta70/B, and the temperature class is Class B (130 °C). The buyer should confirm the load, the duty cycle and the temperature rise for the application.

The transformer is designed for a small power supply, a control circuit or an isolation stage. The output should not be overloaded, and the primary should be protected by a fuse or a suitable circuit. The buyer should ask for the winding resistance, the no-load voltage and the regulation data if the load is sensitive. A custom winding can be made for a different output.

Isolation and Safety

The transformer provides galvanic isolation between the primary and the secondary. The isolation supports safety and helps reduce noise between the mains side and the low-voltage side. The buyer should confirm the creepage, the clearance and the insulation class for the product standard. The sealed body should be free from cracks, and the pins should be straight and clean.

The product is available with VDE, UL, CE and CQC certification. The buyer should ask for the certificate and the test report for the target market. The label should show the model, the input voltage, the output voltage, the power and the date code. A safety approval is important for a product that connects to the mains.

Applications and Ordering

The encapsulated transformer is used in PCB power supplies, home appliances, control boards, instruments, access control, small chargers and industrial electronics. It can provide a low-voltage supply or an isolation barrier. The buyer should confirm the application, the load profile and the environment. A sealed transformer is a good fit for a compact product with a PCB-mounted supply.

Unicreed also supplies toroidal transformers, EI power transformers, high-frequency transformers, common mode chokes, current sense transformers and AC-DC power modules. The EI30 transformer can be combined with a rectifier and a regulator for a complete supply. The buyer should confirm the schematic and the board layout.

To request a quotation, a sample or the current product list, contact Unicreed at sales@unicreed.com or +86-592-6530699. Our team will review the requirement and confirm the available configuration, the lead time and the next steps for your order.

The Encapsulated Transformer should be selected for the input, the output and the isolation. The EI30 PCB transformer from Unicreed is designed for compact power supplies and control boards with a sealed body and dual output. Please share your electrical and board details so that we can confirm the right part and support your next order.