Myrra 47257 4W 5V/12V regulated

The Myrra 47000 Series represents a major leap in power density, efficiency, and energy savings for modern PCB design. These vacuum-encapsulated electronic switch-mode power supplies are engineered as high-performance, drop-in alternatives to traditional linear transformers in all low-power AC/DC applications.

Drop-In Linear Transformer Alternatives

Designed to fit the exact industry-standard footprint of a traditional EI30 transformer, the Myrra 47000 series offers a complete, integrated power solution. By consolidating a 50Hz transformer, safety fuse, bridge rectifier, and filtering capacitor into a single component, these modules allow you to upgrade your power supply performance with zero PCB redesign.

Key Technical Specifications & Features

• High Power Density: Delivers up to three times the output power compared to a standard mechanical EI30 transformer.
• Superior Thermal Efficiency: Typically achieves 70% efficiency under load, dramatically outperforming the 40% efficiency typical of standard linear units.
• Flexible Input Parameters: Supports a wide universal input range from 85V to 265V AC (or 85V to 370V DC) at input frequencies spanning 47Hz to 440Hz.
• Robust Materials: Housed in self-extinguishing UL 94 V-0 rated plastic and protective encapsulation resin.
• Comprehensive Output Options: Available in single output (regulated or unregulated) as well as dual-rail regulated configurations — choosing between common ground (47243 to 47247) or fully isolated outputs (47252 to 47258).
• Global Safety Approvals: Fully certified to EN 60950, EN 60335, and EN 61558-2-17 standards with VDE, CE, ENEC, and UL marks.
• Electromagnetic Compliance: Fully compliant with European EMC standards EN 55014-1 and EN 55022 Class B, alongside strict RoHS compliance.

Whether you are seeking to reduce standby power consumption, limit component count, or safely handle a wider range of mains inputs, the Myrra 47000 SMPS family provides an efficient, space-saving board-mount layout.