WRE 3kVAC Isolated Regulated Dual-Output DC-DC Power Module

Product Advantage

1. Bipolar Regulation for Variable Analog Loads

The WRE Series supplies regulated positive and negative rails with specified output accuracy of ±2% over 20–100% load. Its temperature coefficient is ±0.02%/°C under the stated conditions.

Designed to maintain nominal voltage at no load, the series supports analog circuits with changing power demand. The selected model’s limits for minimum loading and balance between the two rails remain applicable.

2. Electrical Separation Between Supply and Load

Input-to-output isolation is rated at 3,000 VDC, with leakage current below 1 mA and insulation resistance exceeding 10⁹ Ω. Listed coupling capacitance is as low as 60 pF.

Separating the input and output ground domains helps reduce ground-loop interference. Additional features include stated 8 kV ESD protection and input surge filtering, evaluated under the manufacturer’s documented test conditions.

3. Recoverable Overload and Short-Circuit Protection

Integrated protection addresses output overloads and short circuits. Once the fault is cleared, automatic recovery allows the converter to resume operation without routine manual resetting.

Permissible fault duration and recovery behavior depend on the selected version. External fuses and other protective devices should be specified according to the complete equipment design.

4. Output Combinations for Analog and Interface Circuits

Available bipolar outputs include ±3.3, ±5, ±9, ±12 and ±15 VDC, with listed series power ratings from 0.1 to 2 W.

These options accommodate compatible operational amplifiers, instrumentation amplifiers, analog data-converter sections and communication interfaces. Selection should account for each rail’s current demand, allowable ripple and load balance.

5. Small SIP10 Footprint

The 27.4 × 8.8 × 11.0 mm SIP10 package provides input connections, positive and negative outputs, and an output common terminal. Weight ranges from approximately 2 to 6 g, depending on the version.

The insulating black housing carries a stated UL94 V-0 material flammability rating. Operating temperatures span −40°C to +85°C, with storage limits of −55°C to +125°C. Listed efficiency is 60–80%; natural-convection operation must follow the applicable thermal derating requirements.

6. Model Selection for Different Supply Rails

Nominal input choices cover 3.3, 5, 9, 12, 15 and 24 VDC, allowing designers to match the converter to the available system supply.

A modular isolated power stage can simplify PCB integration and reduce discrete converter development. Confirm the chosen part’s actual input range, available voltage combination, output-power allocation, pinout and required external components before installation.

Technical Parameters

Product Uses

Here are seven specific application scenarios of the WRF-1W/2W Series Power and Medical Instrument 3KV Isolation Regulated Short-Circuit Protection Single-Output Power Module:

1.Smart electricity meters: The module is used to provide isolated regulated power for RS485 communication interfaces in three-phase smart electricity meters, with 3KVAC galvanic isolation protecting metering circuits from voltage transients on external communication lines, while the regulated output with 2% precision ensures stable data transmission, fully compliant with national power industry standard DL/T614-2007 for smart metering applications deployed across power distribution grids.

2.Power load management terminals: The module is used to supply isolated power for communication ports in power load control terminals and electricity consumption management terminals, where the self-recovery overload short-circuit protection ensures continuous operation without manual intervention, and the wide voltage input accommodates fluctuating power supply conditions in always-on utility monitoring systems deployed throughout the distribution network.

3.Medical monitoring equipment: The module is used to provide isolated regulated power for signal conditioning circuits and communication interfaces in patient monitoring devices and diagnostic equipment, with 3KVAC galvanic isolation serving as a safety barrier between patient-connected circuits and internal power systems, preventing dangerous leakage currents while the regulated output ensures stable operation of sensitive measurement and data transmission functions.

4.Distribution monitoring instruments: The module is used to supply isolated power for communication and signal processing circuits in distribution load detection instruments and power quality analyzers, with 3KVAC isolation protecting digital processing components from high-voltage transients on external connections, while the compact SIP 7Pin flame-retardant package enables integration into space-constrained monitoring instruments installed in distribution cabinets.

5.Industrial automation communication interfaces: The module is used to provide isolated regulated power for RS485, CAN bus, and other communication interfaces in industrial automation controllers and PLC systems, with 3KVAC galvanic isolation eliminating ground loop interference and protecting communication circuits from electromagnetic interference and voltage surges in harsh industrial manufacturing environments.

6.Medical analytical instruments: The module is used to deliver isolated power for low-voltage digital circuits and communication modules in medical analyzers including blood cell counters and biochemical analyzers, with the regulated output ensuring stable voltage supply for precision measurement circuits, while 3KVAC isolation separates sensitive signal processing electronics from noisy power supply lines in clinical laboratory equipment.