166K12B

Overview

The Hammond Manufacturing 166K12B is a laminated core power transformer designed for chassis mounting. It features a single primary winding rated at 117V and a single secondary winding providing 12.6V with a center tap. The unit delivers a maximum power of 18.9VA and supports an output current of 1.5A. Operating at 50/60 Hz, it offers 2000Vrms isolation voltage. Physical dimensions are 3.25 inches in length, 2.00 inches in width, and 2.81 inches in height, with a weight of approximately 1.5 pounds.

Feature Summary

• Laminated core construction for efficient power transformation
• Center-tapped secondary winding configuration
• Chassis mount installation style with wire leads
• High isolation voltage rating for safety

Applications

• Low voltage rectifier circuits
• Filament power supply applications
• Industrial control equipment power distribution
• General purpose low voltage AC power conversion

Procurement Notes

Verify the specific ordering suffix to ensure correct voltage and current ratings match the design requirements. Confirm that the chassis mounting holes align with the enclosure specifications. Check for compliance with regional safety standards such as UL or CSA if required for the final assembly. Ensure the operating frequency matches the system input (50Hz or 60Hz).

Selection Notes

Select this component when a compact, chassis-mounted solution is required for low voltage applications. The 18.9VA rating suits light industrial loads. Consider the physical footprint constraints against the 3.25 x 2.00 inch base. Verify that the 12.6V center-tapped output aligns with downstream rectification or regulation needs. Compare thermal performance against similar VA-rated transformers in the 166 series.

Part Context

This transformer belongs to the Hammond 166 series, which focuses on general-purpose power transformers for industrial and commercial use. The series typically includes various voltage configurations and mounting styles. The 166K12B specifically addresses the need for reliable, isolated power sources in space-constrained chassis environments. It complements other Hammond components like enclosures and terminal blocks for complete system integration.

Replacement Considerations

• 166L12B

FAQ

What is the isolation voltage rating?

The transformer provides an isolation voltage of 2000Vrms between primary and secondary windings.

Does the secondary winding have a center tap?

Yes, the secondary winding is specified as 12.6V C.T., indicating a center-tapped configuration.

What is the maximum output current?

The maximum output current is 1.5A at full load conditions.