Hammond 102H 2000:500 Ohm CT Interstage PCB Audio Transformer
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Create Free Business AccountKey Features
- Interstage: 2000 ohm primary to 500 ohm CT secondary
- Up to 5.6 mA primary DC
- Bifilar-wound center-tapped secondary for balance
- 20 mW output, 1.5 dB insertion loss, 310 Hz -1 dB
- DCR 341 ohms primary, 62 ohms secondary (+/- 15%)
- Sealed black epoxy; 0.025 in square PCB pins; 100 V peak
The 102H is a miniature interstage audio transformer from the 102 Series, coupling a 2000 ohm primary to a 500 ohm center-tapped secondary. It is intended for P.C. board designs where one amplifier stage drives the next through a transformer, including stages that pass some DC through the primary.
The secondary is center tapped, and the series uses a bifilar winding technique on center-tapped units for balanced resistive and capacitive characteristics. Rugged black epoxy potting makes a completely sealed unit. The part mounts with square pins, 0.025 in square typical, and unused connections have no pin. It follows drawing figure 2.
The 102H accepts up to 5.6 mA of primary DC. DC resistance is 341 ohms primary and 62 ohms secondary, +/- 15%. It is rated at 20 mW output with 1.5 dB insertion loss and a -1 dB low frequency roll-off at 310 Hz. Peak working voltage is 100 V.
The part is RoHS and REACH compliant and ships at 0.02 lbs (0.01 kg). For an open-type P.C. mount alternative, the series literature points to the 148 and 149 series.
Ideal For
- Transformer-coupled amplifier interstages
- Driving balanced stages from a center-tapped secondary
- Compact sealed audio circuits on PCBs
Overview
| Series | 102 Series Miniature Audio Epoxy Potted |
| Description | Audio transformer, potted, primary 2000 ohms, secondary 500 ohms |
| Product Type | Audio transformer, potted |
| Short Description | AUDIO TX INTERSTAGE POTTED |
| Typical Application | Interstage |
Dimensions
| Drawing Figure | 2 |
Electrical
| Output Power | 20 mW |
| Insertion Loss | 1.5 dB |
| Peak Working Voltage | 100V |
| Max. Primary DC Current | 5.6 mA |
| Primary Nominal Impedance | 2000 ohms |
| Secondary Nominal Impedance | 500 CT ohms |
| Low Frequency Roll Off (-1 DB) | 310 Hz |
| Primary DC Resistance (+/- 15%) | 341 ohms |
| Secondary DC Resistance (+/- 15%) | 62 ohms |
Identifiers
| UPC | 623980179100 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 0.02 lbs (0.01 kg) |
Construction & Finish
| Mounting | P.C. board mount |
| Pin Type | Square pin, 0.025 in square typical |
| Construction | Rugged black epoxy potted construction; completely sealed unit |
| Winding Technique | Bifilar winding on center tapped units for balanced resistive and capacitive characteristics |
| Unused Connections | If a connection is not used, no pin will exist |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What is the 102H designed for?▾
Its typical application is interstage coupling, from a 2000 ohm primary to a 500 ohm center-tapped secondary.
How much DC can flow in the primary?▾
Maximum primary DC is 5.6 mA.
Is the secondary center tapped?▾
Yes. The ordering table lists the secondary as 500 ohm CT, and center-tapped units in the series use bifilar winding.
What is the insertion loss?▾
1.5 dB, with 20 mW output.
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