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Product Detailed Parameters
- Description：AUDIO XFMR 300 / 120, 30/30 TH
- Series：149
- Mfr：Hammond Manufacturing
- Package：Bulk
- Mounting Type：Through Hole
- Size / Dimension：1.060" L x 0.820" W (26.92mm x 20.83mm)
- Height - Seated (Max)：0.820" (20.83mm)
- Termination Style：PC Pin
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：300
- Impedance - Secondary (Ohms)：120, 30/30
- DC Resistance (DCR) - Primary：41Ohm
- DC Resistance (DCR) - Secondary：10Ohm
- Transformer Type：Economical Open Type
- Frequency Range：200Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：0.5dB
- Return Loss：-
- Power Level：200mW
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 149E is an open-frame audio transformer designed for PC board mounting. It functions as a driver unit with a single channel configuration and radial pin terminal termination. The component operates within a frequency range of 200 Hz to 15 kHz. Electrical specifications include a primary coil impedance of 300 ohms and a secondary coil impedance of 120 ohms. The device supports a maximum DC current of 42 mA and has a maximum DC resistance of 41 ohms. Physical dimensions are 1.06 inches in length, 0.82 inches in width, and 0.82 inches in height.
Feature Summary
- Open-frame construction suitable for direct printed circuit board integration
- Single-channel design optimized for signal driver applications
- Radial pin terminal configuration for standard mounting
Applications
- Audio signal processing circuits
- Driver stage implementation in audio equipment
- Signal level transformation in electronic systems
Procurement Notes
Verify the specific manufacturer part number against official Hammond Manufacturing documentation to ensure accuracy. Confirm that the required electrical parameters, including impedance ratios and current ratings, align with the design requirements. Check for RoHS compliance status through the official datasheet. Ensure the package type matches the intended PCB layout before finalizing procurement decisions.
Selection Notes
Select this component when an open-frame audio transformer is required for driver applications. Ensure the PCB layout accommodates the radial pin terminals and the specified physical dimensions. Verify that the operating frequency range meets the system requirements. Consider the thermal characteristics associated with the open-frame design during the selection process.
Part Context
This component belongs to the Hammond Manufacturing 149 series of audio transformers. The series includes various configurations for different impedance matching needs. The 149E specifically addresses driver applications with defined primary and secondary impedances. It is part of a broader range of signal transformers offered by the manufacturer for audio electronics.
FAQ
What is the primary impedance of the 149E transformer?
The primary coil impedance is 300 ohms.
Does the 149E support multiple channels?
No, it is a single-channel transformer.
