PAC 3000W Isolation Step Down Transformer | 240V to 100V & 120V Toroidal Voltage Converter (USA & Japan to Australia)
Pre-Order: Estimated Dispatch 19-20 October
Power Rating: 300W Continuous
Delivery Schedule:
This item is in high demand and currently on pre-order. Stock intake is underway with priority dispatches commencing from 19th of October. Full tracking details will be emailed upon dispatch.
The PAC STIS-300 is a compact, audiophile-grade 300W isolated toroidal step-down transformer designed to safely run delicate 120V US/Canadian and 100V Japanese turntables, tube preamplifiers, DACs, and small electronics on Australian 240V mains. Engineered with true physical galvanic isolation to completely eliminate ground loops, mains hum, and line noise, it features dual dedicated outlets (1 x 100V, 1 x 120V) and is rated for 300W continuous 24/7 duty with fuse and thermal overload protection. Backed by PAC's 2-Year Australian Replacement Warranty.
PAC Toroidal Voltage Converters — Compact Galvanic Isolation for High-End Audio & Sensitive Electronics
Deliver dead-silent, isolated AC power to your imported 100V Japanese and 110V–120V North American electronics with the PAC 300W Isolated Toroidal Step-Down Transformer (SKU: STIS-300).
Standard step-down converters share a common neutral and ground with the Australian mains grid, introducing 50Hz audio buzz, dimmer hash, and electrical interference into sensitive audio gear. The STIS-300 incorporates true galvanic isolation through physically separated, double-insulated primary and secondary copper windings. This severs ground loops, lowers the audio noise floor to silence, and shields delicate vintage circuits from mains spikes.
Key Features:
- True Galvanic Isolation: Separate copper windings eliminate ground loops and break noise pathways that cause 50Hz hum in turntables and tube gear.
- Dead-Silent Toroidal Core: Premium wound toroidal core operates with zero audible hum or chassis vibration.
- Dual Output Outlets: Features 1 x 100V (tailored for Japanese Hi-Fi gear) and 1 x 120V (North America) for simultaneous or dedicated use.
- 300W Continuous Duty: High-purity copper windings engineered for 300 Watts continuous 24/7 duty.
- Dual Layer Electrical Protection: Protected by an accessible panel fuse and internal automatic thermal cutoff.
- Standard Australian Plug: Plugs directly into any domestic 10A wall power point with low, clean draw.
- Australian Standards Compliant: ACMA and EESS Responsible Supplier registered for Australian electrical safety.
- 2-Year Replacement Warranty: PAC commercial-grade engineering supported locally in Australia.
Technical Specifications (STIS-300)
| Specification | Details |
| Brand | PAC (Power and Compressions) |
| Model / SKU | STIS-300 |
| Transformer Type | Isolated Toroidal Step-Down Transformer |
| Continuous Rating | 300 Watts (24/7 continuous duty) |
| Input Voltage | 230V – 240V AC, 50Hz |
| Input Connection | Standard Australian 3-pin SAA plug & cord (standard 10A wall plug) |
| Output Voltages | 1 x 100V (Japan) + 1 x 120V (USA/Canada) |
| Output Sockets | Universal high-retention sockets (accepts 2-pin, 2-pin polarized, and 3-pin plugs) |
| Protection | In-Line Fuse Protection & Internal Thermal Cutout |
| Dimensions (L x W x H) | 21.0 x 17.0 x 14.5 cm (approx. casing size) |
| Net Weight | ~4.5 kg |
| Housing | Powder-coated steel enclosure with top carry handle |
| Warranty | 24 Months Replacement Warranty |
Appliance Compatibility & Sizing Guide
| Appliance / Audio Equipment | Typical Voltage & Draw | Compatibility | Technical Requirement |
|---|---|---|---|
| Turntables, Phono Preamps & DACs (Technics SL-1200 Japan, Schiit, Denon 100V/120V) | 100V / 120V (10W – 80W) | Ideal / Recommended | Galvanic isolation removes ground loops and eliminates hum on phono stages. |
| Tube Headphone Amps & CD Players (Woo Audio, Marantz, Sony ES 100V/120V) | 100V–120V (30W – 120W) | Fully Compatible | Delivers clean sine wave power with substantial overhead. |
| US Professional Hair Clippers & Shavers (Wahl, Andis 120V magnetic motors) | 120V (15W – 50W) | Fully Compatible | Clean power conversion prevents magnetic armature chatter. |
| Appliances with Motors or Heating Elements Over 250W (Blenders, KitchenAid, Espresso) | 120V (350W – 2400W) | Not Compatible | Requires our larger STIS-1200, STIS-2400, or STIS-3000 models. |
Frequently Asked Questions (STIS-300)
Q: Why is an isolation transformer essential for imported turntables and preamps?
A: Standard step-down converters share a ground with household electrical circuits, routing noise from appliance motors, air conditioners, and LED dimmers directly into your audio chain. This creates audible 50Hz hum and hiss. The PAC STIS-300 uses physically isolated primary and secondary windings (galvanic isolation) to completely cut that electrical bridge, leaving an ultra-low noise floor.
Q: How is the STIS-300 protected without an external circuit breaker?
A: The STIS-300 is engineered with dual-layer safety: an accessible panel fuse for instant short-circuit/overcurrent protection and an internal automatic thermal cutout that prevents the toroidal core from overheating under prolonged heavy loads.
Q: Can I run Japanese 100V and US 120V gear at the same time?
A: Yes. The STIS-300 features dedicated 1 x 100V and 1 x 120V output sockets. Both can be utilized at the same time as long as the total combined continuous draw stays within 300 Watts.
Q: What warranty and local support are provided?
A: The STIS-300 is backed by PAC's 2-Year Australian Replacement Warranty and complies with ACMA and EESS electrical safety standards.
| Sendle Length | 1 |
|---|---|
| Sendle Width | 1 |
| Sendle Depth | 1 |
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