Hammond 149F 450:40/160 Ohm Driver Transformer, 200 mW PCB Mount
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Create Free Business AccountKey Features
- 450 ohm primary to 40/160 ohm secondary driver transformer
- 200 mW output with 33 mA maximum primary D.C. current
- D.C. resistance 52 ohms primary / 19 ohms secondary (+/- 15%)
- Clinching lugs for extra mounting strength on the P.C. board
- 200 Hz - 15 kHz (+/- 1 dB); approx. 2% distortion at 200 Hz
- 0.025" square pins on 0.2" grid; 250V rms insulation test; RoHS/REACH
The 149F is a PC board mount driver transformer with a 450 ohm primary and a 40/160 ohm secondary. It sits between the 149E and 149G in the series and gives engineers a mid-range driver ratio for audio stages that feed low impedance loads on a compact board layout.
The 149 Series uses an economical, open type, horizontal bracket construction with pin-type terminals for P.C. board mounting, and adds clinching lugs for extra mounting strength. Windings are bifilar wound for balanced capacitive and resistance characteristics on pin bobbins spaced for a standard 0.2" grid, and the series is insulation tested at 250V rms.
The 149F is rated for 200 mW output with a maximum primary D.C. current of 33 mA. D.C. resistance is 52 ohms on the primary and 19 ohms on the secondary (+/- 15%). Frequency response is 200 Hz to 15 kHz (+/- 1 dB, referenced at 1 kHz) and insertion loss is less than 1/2 dB, while total distortion is approximately 2% at 200 Hz for drivers, decreasing at higher frequencies. The split secondary gives a choice of 40 or 160 ohms, wired per schematic figure 2.
Net weight is 1.0 oz. and the listed shipping weight is 0.05 lbs (0.02 kg). The 149F is RoHS and REACH compliant, UPC 623980199207.
Ideal For
- Audio driver transformer for PC boards
- 450 to 40/160 ohm matching
- Low-level audio interstage coupling
Mounting
| Pins | 0.25" length & 0.025" square |
| Pin Spacing | Standard 0.2" grid |
| Mounting Type | P.C. board mount, pin type |
| Schematic Drawing Figure | 2 |
Overview
| Series | 149 Series (Audio Open Frame) |
| Application | Driver |
| Product Type | Audio transformer, open frame PC board mount |
| Short Description | AUDIO TX DRIVER PC MOUNT |
Dimensions
| Net Weight | 1.0 oz. |
Electrical
| Output | 200 mW |
| Insertion Loss | Less than 1/2 dB |
| Insulation Test | 250V rms |
| Total Distortion | Approximately 2% at 200 Hz (drivers), decreasing at higher frequencies |
| Frequency Response | 200 Hz - 15 kHz (+/- 1 dB, ref. @ 1 kHz) |
| Max. Primary DC Current | 33 mA |
| Primary Nominal Impedance | 450 ohms |
| Secondary Nominal Impedance | 40/160 ohms |
| Primary DC Resistance (+/- 15%) | 52 ohms |
| Secondary DC Resistance (+/- 15%) | 19 ohms |
Identifiers
| UPC | 623980199207 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 0.05 lbs (0.02 kg) |
Construction & Finish
| Winding | Bifilar wound for balanced capacitive and resistance characteristics, on pin bobbins |
| Construction | Economical, open type, horizontal bracket construction |
| Clinching Lugs | Included for extra mounting strength |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What impedances does the 149F offer?▾
A 450 ohm nominal primary and a 40/160 ohm nominal secondary.
What is the maximum primary D.C. current for the 149F?▾
33 mA.
What output power is the 149F rated for?▾
200 milliwatts.
How is the 149F mounted?▾
It is a pin-type P.C. board mount transformer with 0.025" square pins on bobbins spaced for a standard 0.2" grid. The 149 Series also includes clinching lugs for extra mounting strength.
Is the 149F RoHS and REACH compliant?▾
Yes. The part is listed as both RoHS compliant and REACH compliant.
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