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Wallco is a factory authorized SolaHD distributor offering a complete selection of industrial control transformers for machine control, automation equipment, motor control circuits, OEM machinery, and industrial control panels. SolaHD Control Transformers are designed to maintain dependable secondary voltage during the high inrush conditions created by contactors, relays, solenoids, motor starters, and other electromagnetic control devices.
The SolaHD control transformer product family includes SBE encapsulated control transformers, SBE open-style control transformers, SMT open-style transformers, SBE International transformers, ICE International transformers, and HSZ enclosed transformers. Available designs include copper-wound and aluminum-wound models, epoxy-encapsulated and open-style construction, international voltage configurations, IP20 touch-safe options, and enclosed models for installation outside the control panel.
Control transformer ratings range from 50 VA to 10 kVA. Available configurations include standard industrial primary and secondary voltages, multi-tap international models, 24-volt control transformers, and enclosed transformers with Type 3R, 4, 4X, and 12 enclosure options. SolaHD control transformers meet or exceed applicable NEMA performance requirements and are engineered for dependable operation in demanding industrial environments.
Download the SolaHD Industrial Control Transformer Selection Guide for information on transformer sizing, voltage codes, sealed VA, inrush VA, power factor, available series, and control transformer selection.
Download the SolaHD Industrial Control Transformer Selection Guide (PDF)
Browse the product families below to select the best transformer for your application, from compact SBE encapsulated models for standard industrial panels to international voltage models and fully enclosed HSZ transformers for mounting outside the control cabinet.
Selecting the correct control transformer requires more than matching the primary and secondary voltage. Industrial control devices such as contactors, relays, solenoids, and motor starters may draw several times their normal operating current when first energized. The transformer must provide enough continuous capacity for the steady-state load while maintaining sufficient secondary voltage during maximum inrush conditions.
Before selecting a SolaHD control transformer, identify the available supply voltage, required control voltage, total sealed VA, total inrush VA, operating frequency, environmental conditions, mounting requirements, and any required domestic or international certifications. The transformer continuous VA rating must exceed the total sealed load, and its inrush performance must be sufficient for all control devices that may energize simultaneously.
| Series | Best For |
|---|---|
| SBE Encapsulated | Standard industrial control panels requiring copper windings, low temperature rise, and protection from moisture, dirt, and contaminants |
| SBE Open Style | Higher-capacity control circuits with large electromagnetic loads and strong voltage-regulation requirements |
| SMT Open Style | Economical higher-capacity applications using compact aluminum-wound open-style construction |
| SBE International | International machinery and export equipment requiring multiple voltage taps and IEC-oriented configurations from 50 to 750 VA |
| ICE International | Higher-capacity international equipment requiring copper windings, encapsulated construction, and IP20 touch-safe terminations |
| HSZ Enclosed | Outdoor, washdown, dusty, corrosive, or high-temperature applications where the transformer must be mounted outside the control panel |
If you're unsure which SolaHD control transformer is best for your application, our team can help identify the correct series and catalog number based on your primary voltage, secondary voltage, sealed VA, inrush VA, winding preference, mounting requirements, and operating environment.