Overview
The Hammond PT50MBMH is a Type 3AH control transformer rated at 50VA with dual-frequency operation (50/60Hz). Built for industrial machinery control, instrumentation, and general-purpose power distribution, this unit features vacuum-impregnated construction for environmental protection and long-term reliability. The compact footprint and proven Hammond design make it a dependable choice for OEM equipment and field retrofits.
Key Features
- 50VA power rating—suitable for control circuits and measurement applications
- Dual-frequency rated: 50/60Hz operation without switching or modification
- Vacuum-impregnated VT Polyester Resin construction—seals unit and eliminates moisture ingress
- Compact Type 3AH enclosure with panel-mount fuse clips (secondary)
- Standard Hammond footprint and mounting pattern for easy installation and replacement
- Temperature rise limited to specification—no cooling required for rated duty
Technical Specifications
- Power Rating: 50 VA
- Frequency: 50/60 Hz
- Secondary Output Amps: 0.43 A (at rated VA)
- Enclosure Type: Type 3AH (open style with fuse clips)
- Overall Dimensions: 3.00″ W × 3.75″ H × 2.75″ D
- Mounting Centers: 2.50″ × 2.25″
- Fuse Clip Size: 0.22″ × 0.75″ (secondary)
- Shipping Weight: 3.60 lbs
- Construction: Vacuum-impregnated polyester resin
- Primary Voltage Options: 230V, 460V, or 575V (verify jumper configuration on unit)
Typical Applications
- Industrial machinery control circuits and solenoid valve circuits
- Measurement instrumentation and control panel power supplies
- General-purpose stepping/boosting voltage transformation
- Retrofit replacement in legacy equipment maintenance
- OEM equipment requiring compact, reliable control voltage
Compatibility & Replacements
Compatible With
- 480V three-phase or single-phase industrial power systems
- 600V industrial power distribution (with primary jumper selection)
- Standard panel-mount fuse clips (13/32″ × 1 1/2″ fuses up to 1000VA units)
- General-purpose industrial control wiring and conduit systems
Replaces / Drop-In Replacement For
- Other Hammond PT-series 50VA transformers with matching primary voltage and footprint
- OEM control transformers of similar VA rating and type designation
- Legacy equipment using 50VA control transformers (verify primary and secondary voltages before installation)
Works With
- Standard industrial electrical panel configurations
- Relay logic, PLC, and automation control systems requiring stable voltage
- Standard magnetic starter and contactor control circuits
- Single-phase and three-phase power distribution systems (verify primary tap configuration)
