| Manufacturer | Part Number | Description |
|---|---|---|
RCA
| T6421 | Thyristors |
Exar (now MaxLinear)
| XR-T6421 | Speakerphone Control IC |
| Unknown Manufacturer | T6421 | 30-A SILICON TRIACS |
Ledtech
| LT6421-81 | STANDARD LED LAMP |
Panasonic
| AXT642124 | Header |
