| Code | Device | Manf | Base | Package | Leaded Equivalent/Data |
| X (white) | BB833 | Sie | I | SOT323 | 9.3-0.75pF varicap |
| X (yellow) | BB835 | Sie | I | SOT323 | 9.1-0.6pF varicap |
| X1 | BFT93 | Sie | N | SOT23 | BFQ23 BFQ75 |
| X1p | BFT93 | Phi | N | SOT23 | BFQ23 BFQ75 |
| X1 | IMX1 | Roh | DC | dual 2SC2412K npn | |
| X1 | BZX84-C27 | Phi | C | SOT23 | 0.3W zener 27V±5% |
| X2 | IMX2 | Roh | DD | dual 2SC2412K npn | |
| X2 | BZX99-C13 | Phi | C | SOT23 | 13V 0.3W zener ±5% |
| X2 | BZX84-C30 | Zet | C | SOT23 | 0.3W zener 30V±5% |
| X2 | BZV49C30 | Zet | O | SOT89 | 1W zener 30V±5% |
| X3 | BZX99-C15 | Phi | C | SOT23 | 15V 0.3W zener ±5% |
| X3 | BZX84-C33 | Zet | C | SOT23 | 0.3W zener 33V±5% |
| X4 | BFT93R | Sie | R | SOT23R | BFQ23 BFQ75 |
| X4 | BZX84-C36 | Zet | C | SOT23 | 0.3W zener 36V±5% |
| X5 | BZV49C39 | Zet | O | SOT89 | 1W zener 39V±5% |
| X5 | MMBV409G | Mot | C | SOT23 | Hyperabrupt varicap |
| X6 | BZV49C43 | Zet | O | SOT89 | 1W zener 43V±5% |
| X6 | BZX84-C43 | Zet | C | SOT23 | 0.3W zener 43V±5% |
| X7 | BZX84-C47 | Zet | C | SOT23 | 0.3W zener 47V±5% |
| XAs | BCR503 | Sie | N | SOT23 | npn dtr 50V 0.5A 2k2 +2k2 |
| XA | BZX284-B7V5 | Phi | I | SOD110 | 0.4W zener 7.5V E24 ±2% |
| XA | BZX99-C4V7 | Phi | C | SOT23 | 4.7V 0.3W zener |
| XBs | BCR553 | Sie | N | SOT23 | pnp dtr 50V 0.5A 2k2 +2k2 |
| XB | BZX284-B8V2 | Phi | I | SOD110 | 0.4W zener 8.2V E24 ±2% |
| XB | BZX99-C5V1 | Phi | C | SOT23 | 5.1V 0.3W zener |
| XCs | BCR533 | Sie | N | SOT23 | npn dtr 50V 0.5A 10k + 10k |
| XC | BZX284-B9V1 | Phi | I | SOD110 | 0.4W zener 9.1V E24 ±2% |
| XC | BZX99-C5V6 | Phi | C | SOT23 | 5.6V 0.3W zener |
| XDs | BCR555 | Sie | N | SOT23 | pnp dtr 50V 0.5A 2k2 +10k |
| XD | BZX284-B10 | Phi | I | SOD110 | 0.4W zener 10V E24 ±2% |
| XD | BZX99-C6V2 | Phi | C | SOT23 | 6.2V 0.3W zener |
| XE | BZX284-B11 | Phi | I | SOD110 | 0.4W zener 11V E24 ±2% |
| XE | BZX99-C6V8 | Phi | C | SOT23 | 6.8V 0.3W zener |
| XFs | BCR512 | Sie | N | SOT23 | npn dtr 50V 0.5A 4k7+ 4k7 |
| XF | BZX284-B12 | Phi | I | SOD110 | 0.4W zener 12V E24 ±2% |
| XGs | BCR523 | Sie | N | SOT23 | npn dtr 50V 0.5A 1k0 +10k |
| XG | BZX284-B13 | Phi | I | SOD110 | 0.4W zener 13V E24 ±2% S |
| XHs | BCR573 | Sie | N | SOT23 | pnp dtr 50V 0.5A 1k0 +10k |
| XH | BZX284-B15 | Phi | I | SOD110 | 0.4W zener 15V E24 ±2% |
| XH | MMSD701 | Mot | I | SOD123 | MMBD701 |
| XI | BZX284-B16 | Phi | I | SOD110 | 0.4W zener 16V E24 ±2% |
| XJ | BZX284-B18 | Phi | I | SOD110 | 0.4W zener 18V E24 ±2% |
| XKs | BCR519 | Sie | N | SOT23 | npn dtr 50V 0.5A R1 4k7 |
| XK | BZX284-B20 | Phi | I | SOD110 | 0.4W zener 20V E24 ±2% |
| XLs | BCR569 | Sie | N | SOT23 | pnp dtr 50V 0.5A R1 4k7 |
| XL | BZX284-B22 | Phi | I | SOD110 | 0.4W zener 22V E24 ±2% |
| XL | BZX99-C2V4 | Phi | C | SOT23 | 2.4V 0.3W zener |
| XMs | BCR583 | Sie | N | SOT23 | pnp dtr 50V 0.5A 10k +10k |
| XM | BZX284-B24 | Phi | I | SOD110 | 0.4W zener 24V E24 ±2% |
| XM | BZX99-C2V7 | Phi | C | SOT23 | 2.7V 0.3W zener |
| XN | BZX284-B27 | Phi | I | SOD110 | 0.4W zener 27V E24 ±2% |
| XN | BZX99-C3V0 | Phi | C | SOT23 | 3.0V 0.3W zener |
| XO | BZX284-B30 | Phi | I | SOD110 | 0.4W zener 30V E24 ±2% |
| XP | MMBD3000 | Mot | C | SOT346 | Si diode 30V 0.2A |
| XP | BZX284-B33 | Phi | I | SOD110 | 0.4W zener 33V E24 ±2% |
| XP | BZX99-C3V3 | Phi | C | SOT23 | 3.3V 0.3W zener |
| XQ | MMBD3005 | Mot | A | SOT346 | dual ca MMBD3000 |
| XQ | BZX284-B36 | Phi | I | SOD110 | 0.4W zener 36V E24 ±2% |
| XQ | 2PD602AQ | Phi | N | SOT346 | gp npn hfe 85-170 |
| XR | BZX284-B39 | Phi | I | SOD110 | 0.4W zener 39V E24 ±2% |
| XR | BZX99-C3V6 | Phi | C | SOT23 | 3.6V 0.3W zener |
| XR | MRF2947RA | Mot | DH | SOT363 | dual MRF941 npn RF 9GHz |
| XR | 2PD602AR | Phi | N | SOT346 | gp npn hfe 120-240 |
| XS | MMBD3010 | Mot | B | SOT346 | dual cc MMBD3000 |
| XS | BZX284-B43 | Phi | I | SOD110 | 0.4W zener 43V E24 ±2% |
| XS | BZX99-C3V9 | Phi | C | SOT23 | 3.9V 0.3W zener |
| XS | 2PD602AS | Phi | N | SOT346 | gp npn hfe 170-340 |
| XT | BZX284-B47 | Phi | I | SOD110 | 0.4W zener 47V E24 ±2% |
| XT | MMSD301 | Mot | I | SOD123 | MBD301 |
| XT | BZX99-C4V3 | Phi | C | SOT23 | 4.3V 0.3W zener |
| XU | BZX284-B51 | Phi | I | SOD110 | 0.4W zener 51V E24 ±2% |
| XU | MRF2947RA | Mot | DH | dual MRF941 npn RF 9GHz | |
| XUs | BCR562 | Sie | N | SOT23 | pnp dtr 50V 0.5A 4k7+ 4k7 |
| XU | BZX99-C7V5 | Phi | C | SOT23 | 7.5V 0.3W zener |
| XV | BZX284-B56 | Phi | I | SOD110 | 0.4W zener 56V E24 ±2% |
| XVs | BCR521 | Sie | N | SOT23 | npn dtr 50V 0.5A 1k0 +1k0 |
| XV | BZX99-C8V2 | Phi | C | SOT23 | 8.2V 0.3W zener |
| XW | BZX284-B62 | Phi | I | SOD110 | 0.4W zener 62V E24 ±2% |
| XWs | BCR505 | Sie | N | SOT23 | npn dtr 50V 0.5A 2k2 +10k |
| XW | BZX99-C9V1 | Phi | C | SOT23 | 9.1V 0.3W zener |
| XX | BZX284-B68 | Phi | I | SOD110 | 0.4W zener 68V E24 ±2% |
| XX | BZX99-C10 | Phi | C | SOT23 | 10V 0.3W zener |
| XXs | BCR571 | Sie | N | SOT23 | pnp dtr 50V 0.5A 1k0 +1k0 |
| XY | BZX99-C11 | Phi | C | SOT23 | 11V 0.3W zener |
| XY | BZX284-B75 | Phi | I | SOD110 | 0.4W zener 75V E24 ±2% |
| XZ | BZX99-C12 | Phi | C | SOT23 | 12V 0.3W zener |