45000 series 50Hz encapsulated low frequency laminated transformers
- Technology
- Low frequency laminated transformers
- Partner
- Myrra
The Myrra 45000 Series encapsulated transformers are PCB-mounted power transformers for 50/60 Hz mains applications. They use a laminated core in a low-profile resin-filled housing for reliable isolation in safety and control circuits. Each model features dual 115 V primary windings for 115 V or 230 V AC input configuration. The range includes one or two secondary windings that can be used independently, in series, or in parallel depending on the required output. Fully encapsulated UL 94 V-0 resin construction supports quiet operation and environmental protection. Typical applications include industrial control, instrumentation, and power supply assemblies. The series delivers outputs from 1 VA to 60 VA while maintaining 4 kV isolation between primary and secondary. UL, VDE, and EN61558 compliance make the range suitable for safety-focused PCB power designs.
The 45000 Series is designed for engineers who need a compact, PCB-mounted mains isolation transformer with broad input flexibility and multiple output options. Its encapsulated low-profile construction combines mechanical stability, reduced audible hum, and dependable insulation performance, making it well suited to industrial electronics, instrumentation, and embedded power supply stages.
Range features
A high level overview of what this range offers
- Dual 115 V / 230 V primaries: Two primary windings can be connected in series or parallel for worldwide mains compatibility.
- Flexible secondary arrangements: Equal secondary windings can be used independently, in series for higher voltage, or in parallel for higher current.
- Wide 1 VA to 60 VA range: Covers low-power control circuits through to higher power PCB supply requirements.
- Low-profile encapsulated package: Resin-filled laminated construction supports direct PCB mounting with a compact height.
- Safety isolating design: Provides 4 kV isolation between primary and secondary for secure mains separation.
- UL 94 V-0 vacuum-filled resin: Helps improve moisture resistance, thermal behavior, and quiet operation.
- Thermal class B insulation: Designed for dependable service with T50 B or T70 B ratings depending on model.
- Supports external secondary protection: Allows use of fuses or thermal cut-outs for overload and short-circuit protection.
- 100% production tested: Each transformer is functionally and electrically tested for consistent quality.
Downloads
for 45000 series 50Hz encapsulated low frequency laminated transformers
What’s in this range?
All the variants in the range and a comparison of what they offer
Reference Range | VA Rating | Primary (VAC) | Secondary (VAC) | Secondary Current | Temp. Class | Core Size |
45001 – 45006 | 1 VA | 230 V | 9 V – 24 V (single) | 167 mA – 42 mA | T70 B | UI21 |
45292 – 45297 | 2 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 167 mA – 2 × 42 mA | T70 B | UI30 × 5.5 |
45013 – 45018 | 3 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 250 mA – 2 × 63 mA | T70 B | UI30 × 5.5 |
45019 – 45024 | 4 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 333 mA – 2 × 83 mA | T70 B | UI30 × 7.5 |
45025 – 45030 | 6 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 500 mA – 2 × 125 mA | T70 B | UI30 × 10.5 |
45031 – 45036 | 10 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 833 mA – 2 × 208 mA | T50 B | UI30 × 16.5 |
45037 – 45042 | 10 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 833 mA – 2 × 208 mA | T50 B | UI39 × 8 |
45043 – 45048 | 14 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 1167 mA – 2 × 292 mA | T50 B | UI39 × 10.2 |
45049 – 45054 | 18 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 1500 mA – 2 × 375 mA | T50 B | UI39 × 13.5 |
45055 – 45060 | 24 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 2000 mA – 2 × 500 mA | T50 B | UI39 × 17 |
45061 – 45066 | 30 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 2500 mA – 2 × 625 mA | T50 B | UI39 × 21 |
45067 – 45072 | 40 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 3333 mA – 2 × 833 mA | T50 B | UI48 × 17 |
45073 – 45078 | 60 VA | 115/230 V | 2 × 6 V – 2 × 24 V | 2 × 5000 mA – 2 × 1250 mA | T50 B | UI48 × 26 |
Specification notes
- 115/230 V primary indicates dual 115 V windings configurable for either 115 V or 230 V AC input.
- Secondary voltages are listed per winding and may be used independently or combined in series or parallel where appropriate.
- T50 B / T70 B indicates the maximum ambient temperature rating together with Class B insulation.
- PCB mounting is through-hole, with final footprint and pin layout depending on the specific model in the series.
FAQs
for 45000 series 50Hz encapsulated low frequency laminated transformers
Each transformer has two identical 115 V primary windings. For 230 V AC input, connect the primaries in series. For 115 V AC input, connect them in parallel. Always follow the datasheet terminal markings to ensure correct phasing and safe wiring.
Yes. The equal secondary windings can be used separately, connected in series to increase voltage, or connected in parallel to increase current capacity. When paralleling secondaries, make sure the windings are in phase and have identical voltage ratings.
The 45000 Series is designed as a safety isolating transformer range with 4 kV isolation between primary and secondary. The series is described as meeting EN61558 requirements and carrying UL and VDE related approvals for safety-focused applications.
Class B insulation corresponds to a maximum insulation system temperature of 130 °C. T50 B or T70 B indicates the maximum rated ambient temperature together with the insulation class. For example, T70 B indicates operation up to 70 °C ambient, while T50 B indicates operation up to 50 °C ambient.
The standard versions are designed for safe transformer operation but do not typically include an internal fuse as standard. It is recommended to add suitable secondary-side protection, and primary-side protection if required by the application, to guard against overload or sustained fault conditions.
Yes. Although the series is presented as a 50 Hz low-frequency transformer range, it is intended for 50/60 Hz mains operation. Ensure the primary is wired correctly for the local supply voltage and do not exceed the rated VA of the selected model.
