| K5500 |  | Unknown | Semiconductor Master Cross Reference Guide | Scan | PDF | 118.45KB | 1 | 
| K-5500 |  | OPTEK Technology | Phototransistors | Scan | PDF | 84.71KB | 1 | 
| K5501 |  | Unknown | Semiconductor Master Cross Reference Guide | Scan | PDF | 118.45KB | 1 | 
| K-5501 |  | OPTEK Technology | Phototransistors | Scan | PDF | 84.71KB | 1 | 
| K5502 |  | Unknown | Semiconductor Master Cross Reference Guide | Scan | PDF | 118.45KB | 1 | 
| K-5502 |  | OPTEK Technology | Phototransistors | Scan | PDF | 84.71KB | 1 | 
| K5503 |  | Unknown | Semiconductor Master Cross Reference Guide | Scan | PDF | 118.45KB | 1 | 
| K-5503 |  | OPTEK Technology | Phototransistors | Scan | PDF | 84.71KB | 1 | 
| K5504 |  | Unknown | Semiconductor Master Cross Reference Guide | Scan | PDF | 118.45KB | 1 | 
| K-5504 |  | OPTEK Technology | Phototransistors | Scan | PDF | 84.71KB | 1 | 
| K5505 |  | Unknown | Semiconductor Master Cross Reference Guide | Scan | PDF | 118.45KB | 1 | 
| K-5505 |  | OPTEK Technology | Phototransistors | Scan | PDF | 84.71KB | 1 | 
| K550C |  | MtronPTI | 8 pin DIP, 5.0 Volt, CMOS/TTL, Clock Oscillator | Original | PDF | 194.51KB | 1 | 
| K5550 |  | Unknown | Semiconductor Master Cross Reference Guide | Scan | PDF | 118.45KB | 1 | 
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| K-5550 |  | OPTEK Technology | Phototransistors | Scan | PDF | 84.71KB | 1 | 
| K5551 |  | Unknown | Semiconductor Master Cross Reference Guide | Scan | PDF | 118.45KB | 1 | 
| K-5551 |  | OPTEK Technology | Phototransistors | Scan | PDF | 84.71KB | 1 | 
| K5552 |  | Unknown | Semiconductor Master Cross Reference Guide | Scan | PDF | 118.45KB | 1 | 
| K-5552 |  | OPTEK Technology | Phototransistors | Scan | PDF | 84.71KB | 1 | 
| K5553 |  | Unknown | Semiconductor Master Cross Reference Guide | Scan | PDF | 118.45KB | 1 |