The JBK3-250 is a machine tool control transformer manufactured by Juche Electric Co., Ltd., rated at 250 VA capacity. It is part of the JBK3 series, which was an earlier generation of Juche’s control transformers before the improved JBK5 series. The JBK3-250 is designed to provide stable AC power for control circuits, signal lamps, and work lighting in industrial and mechanical equipment.

Technical Specifications of JBK3-250

• Manufacturer: Juche Electric Co., Ltd.
• Series: JBK3 (Machine Tool Control Transformers)
• Model: JBK3-250
• Rated Capacity: 250 VA

The JBK3 series transformers were widely used in machine tools and automation systems to supply control power. The JBK3-250 provides 250 VA output capacity, making it suitable for medium-load control circuits.

Compared to the later JBK5 series, the JBK3 transformers had a simpler terminal design and slightly lower performance in terms of insulation and ambient temperature tolerance. The JBK5 series was introduced as an upgrade to JBK3, but both remain in use for legacy equipment and retrofits.

Key Applications

• Machine tool control circuits
• Industrial automation systems
• Signal lamp power supply
• Work lighting in mechanical equipment
• Auxiliary power for electrical panels