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Product Detailed Parameters
- Description：PWR XFMR LAMINATED 2.5VA CHAS MT
- Series：166
- Mfr：Hammond Manufacturing
- Package：Bulk
- Type：Laminated Core
- Voltage - Primary：115V
- Voltage - Secondary (Full Load)：25V
- Current - Output (Max)：100mA
- Primary Winding(s)：Single
- Secondary Winding(s)：Single
- Center Tap：Yes
- Power - Max：2.5VA
- Mounting Type：Chassis Mount
- Termination Style：Wire Leads
- Size / Dimension：53.32mm L x 35.05mm W
- Height - Seated (Max)：30.23mm
- Voltage - Isolation：2000Vrms
- Weight：0.3 lb (136.08 g)
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Overview
The Hammond Manufacturing 166D25 is an industrial power transformer designed for low voltage applications. It features a single primary winding rated at 115 VAC and operates at frequencies of 50 Hz or 60 Hz. The secondary output provides 25 VAC center-tapped configuration with a current rating of 0.1 A. The unit has a power rating of 2.5 VA and utilizes wire leads for termination. It is constructed for chassis mounting and supports an operating temperature range from 0°C to +130°C.
Feature Summary
- Provides isolated low voltage AC power conversion for control circuits
- Features a robust open construction suitable for chassis integration
- Designed for reliable operation within extended industrial temperature ranges
Applications
- Industrial control panel power supplies
- Low voltage equipment powering
- General purpose isolation in electronic assemblies
Procurement Notes
Verify the specific datasheet version for the 166D25 to confirm exact dimensional tolerances and insulation class ratings before finalizing design integration. Ensure that the input voltage frequency matches the system requirements, as the component is specified for 50/60 Hz operation. Confirm that the chassis mounting style aligns with the enclosure design constraints.
Selection Notes
Select this model when a compact, low-power isolation solution is required for 115V primary systems. The 2.5 VA rating limits its use to small signal or relay control loads rather than high-current drives. Consider the physical dimensions and lead length during layout planning to ensure adequate clearance and connection accessibility within the target assembly.
Part Context
This component belongs to the Hammond 166 series of industrial control transformers. The series offers various power ratings and voltage configurations to suit different control circuit needs. The 166D25 represents the lower end of the power spectrum within this lineup, providing essential isolation for sensitive low-power electronics.
Replacement Considerations
Direct substitutes include other Hammond 166 series variants with identical electrical specifications but different packaging or terminal styles. Cross-brand replacements must match the 2.5 VA rating, 115V primary, and 25V CT secondary characteristics precisely to maintain circuit functionality.
