XH-R30 30VA Precision R-Core Power Transformer AutoCAD GA Blueprint

R-Core & Audio Transformers · R-Core Power Transformers

XH-R30 30VA Precision R-Core Power Transformer

30VA audiophile-grade R-Core power transformer designed for Hi-Fi preamplifiers, CD players, phono stages, and low-noise linear power supplies. Features dual-bobbin symmetrical winding, zero mechanical hum, and full OFC electrostatic copper shielding.

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Technical Specifications

Power Rating 30 VA
Core Type Continuous Nippon Steel Silicon Strip (Zero Air Gap)
Magnetic Flux Leakage < 5 mG (1/10th of EI Core)
Dielectric Withstand 4,000 V AC Primary-Secondary (1 min)
Insulation Resistance > 100 MΩ @ 500V DC
Outer Dimensions (L×W×H) 78 × 68 × 46 mm
Mounting Hole Centers (A×B) 68 × 52 mm
Net Weight 0.65 kg
Secondary Options 15V-0-15V / 18V-0-18V / 24V-0-24V (Dual 1.0A)
Lead Wires High-Temperature PTFE Teflon Silver-Plated (300mm)

Product Information

Status

Published

Product ID

XH_R30_PRECISION_R_CORE_TRANSFORMER

Last Updated

2026-10-09T06:05:35.945517+00:00

Technical Highlights

  • Zero mechanical hum or acoustic vibration — continuous strip has no stamped lamination burrs or loose gaps.
  • No-load exciting current is less than 10% of traditional EI transformers, with full-load temperature rise ≤ 35K.

Application Scenarios

  • High-end audiophile DACs, phono preamplifiers, headphone amplifiers, tube power amplifiers, and low-noise precision medical instruments.

Key Features

  • Continuous circular-cross-section core wound from premium Nippon Steel grain-oriented silicon strip.
  • Twin balanced bobbins provide 100% galvanic symmetry and extremely low inter-winding capacitive coupling (<15 pF).
  • Annealed OFC copper perimeter foil shield band virtually eliminates stray magnetic field radiation (<5 mG).

Frequently Asked Questions

Contact our engineering team with your primary voltage (115V / 230V universal) and custom secondary tap requests.

Manufactured to IEC 61558-1 and UL 5085. 4,000V primary-to-secondary isolation test. Flame retardant Class B/F insulation system.

Export carton packaging with molded foam compartments. Fast batch dispatch from Hefei factory.

Related Markets & Resources

Buyer's Guide

How to source from China

Standards & Compliance

Manufactured to IEC 61558-1 and UL 5085. 4,000V primary-to-secondary isolation test. Flame retardant Class B/F insulation system.

Packaging, Delivery & Service

Export carton packaging with molded foam compartments. Fast batch dispatch from Hefei factory.

Contact our engineering team with your primary voltage (115V / 230V universal) and custom secondary tap requests.

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