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| Code | Device | Manufacturer | Base | Package | Leaded Equivalent/Data |
| -4 | PMSS3904 | Phi | - | SOT323 | - |
| 4 | PDTC114EK | Phi | - | SOT346 | - |
| 42 | BAT54AW | Phi | - | SOT323 | - |
| 43 | 1PS89SB15 | Phi | - | SOT490 | - |
| 43 | BAT54CW | Phi | - | SOT323 | - |
| 44 | 1PS89SB14 | Phi | - | SOT490 | - |
| 44 | BAT54SW | Phi | - | SOT323 | - |
| 45 | 1PS75SB45 | Phi | - | SOT416 | - |
| 45 | 1PS89SB16 | Phi | - | SOT490 | - |
| 431 | PZM4.3NB1 | Phi | - | SOT346 | Zener Diode |
| 432 | PZM4.3NB2 | Phi | - | SOT346 | Zener Diode |
| 433 | PZM4.3NB3 | Phi | - | SOT346 | Zener Diode |
| 471 | PZM4.7NB1 | Phi | - | SOT346 | Zener Diode |
| 472 | PZM4.7NB2 | Phi | - | SOT346 | Zener Diode |
| 473 | PZM4.7NB3 | Phi | - | SOT346 | Zener Diode |
| 4001 | PRLL4001 | Phi | IA | SOD87 | Diode |
| 4002 | PRLL4002 | Phi | IA | SOD87 | Diode |
| 4 | BB664 | Sie | I | SCD80 | Varicap 42-2.5pF |
| 4 (red) | BB57-03W | Sie | I | SOT323 | Varicap |
| 4 (white) | BAS140W | Sie | I | SOT323 | 40V 120mA sw schottky |
| 4 (yellow) | BB644 | Sie | I | SOT323 | Varicap 42-2.5pF |
| 404 | TK15404M | Tok | - | SOT23-6 | Single channel videodriver IC |
| 405 | TK15405M | Tok | - | SOT23-6 | 75 Ohm Video Line driver IC with clamp |
| 406 | TK15406M | Tok | - | SOT23-6 | 75 Ohm Video Line driver IC |
| 40U | TK61040S | Tok | - | SOT23-5 | Voltage detector |
| 41 | BAT14-115R | Sie | - | SOT173 | 40GHz schottky ring quad |
| 41 | BAT14-115S | Sie | - | SOT173 | 40GHz schottky diode |
| 413 | FMMT413 | Zet | N | SOT23 | npn avalanche 150v 0.1A |
| 415 | FMMT415 | Zet | N | SOT23 | npn avalanche 260v 0.1A |
| 417 | FMMT417 | Zet | N | SOT23 | npn avalanche 320v 0.1A |
| 41A | FMMT491A | Zet | N | SOT23 | npn 40v 1A max |
| 41D | BAT14-115D | Sie | - | SOT173 | 40GHz schottky dual |
| 41U | TK61041S | Tok | - | SOT23-5 | Voltage detector |
| 42 | BAT14-025R | Sie | - | SOT173 | 4GHz schottky ring quad |
| 42 | BAT14-025S | Sie | - | SOT173 | 4GHz schottky diode |
| 42 | BAT54AW | Phi | C | SOT323 | Schottky barrier diode |
| 423APH | BA423A | Phi | IB | SOD68 | Diode |
| 42D | BAT14-025D | Sie | - | SOT173 | 4GHz schottky dual |
| 42U | TK61042S | Tok | - | SOT23-5 | Voltage detector |
| 43 | BAS40 | Sie | C | SOT23 | schottky diode 40V 100mA |
| 43 | BAT54CW | Phi | B | SOT323 | Schottky barrier double diodes |
| 43 | DTA143EE | Mot | N | SOT416 | pnp dtr 4k7 + 4k7 |
| 43 | DTC143XE | Roh | N | EMT3 | npn dtr 4k7+10k 50V 100mA |
| 43 | DTC143XKA | Roh | N | SC59 | npn dtr 4k7+10k 50V 100mA |
| 43 | DTC143XUA | Roh | N | SC70 | npn dtr 4k7+10k 50V 100mA |
| 430PH | BZD23-C430 | Phi | IB | SOD81 | Zener Diode |
| 430PH | BZD27-C430 | Phi | IA | SOD87 | Zener Diode |
| 431 | PZM4.3NB1 | Phi | C | SOT346 | 4.3V 0.3W zener |
| 43-16PH | BYD43-16 | Phi | IB | SOD81 | Diode |
| 43-18PH | BYD43-18 | Phi | IB | SOD81 | Diode |
| 432 | PZM4.3NB2 | Phi | C | SOT346 | 4.3V 0.3W zener |
| 43-20PH | BYD43-20 | Phi | IB | SOD81 | Diode |
| 433 | PZM4.3NB3 | Phi | C | SOT346 | 4.3V 0.3W zener |
| 43p | BAS40 | Phi | - | SOT23 | - |
| 43PH | BZD23-C43 | Phi | IB | SOD81 | Zener Diode |
| 43PH | BZD27-C43 | Phi | IA | SOD87 | Zener Diode |
| 43t | BAS40 | Phi | - | SOT23 | - |
| 43UPH | BYD43U | Phi | IB | SOD81 | Diode |
| 43V | PZM43NB | Phi | - | SOT346 | Zener Diode |
| 43VPH | BYD43V | Phi | IB | SOD81 | Diode |
| 43Y | BZV49-C43 | Phi | - | SOT89 | Zener Diode |
| 44 | 2SC5009 | NEC | N | - | npn RF fT 12GHz @3V 5mA |
| 44 | BAS40-04 | Sie | D | SOT23 | dual series BAS40 |
| 44 | BAS40-04W | Sie | D | SOT323 | dual series BAS40 |
| 44 | BAT54SW | Phi | D | SOT323 | Schottky barrier double diodes |
| 449 | FMMT449 | Zet | N | SOT23 | npn 50V 1A low Vce sat |
| 44p | BAS40-04 | Phi | - | SOT23 | - |
| 44t | BAS40-04 | Phi | - | SOT23 | - |
| 45 | BAS40-05 | Sie | A | SOT23 | dual ca BAS40 |
| 45 | BAS40-05W | Sie | A | SOT323 | dual ca BAS40 |
| 45 | BAT14-055R | Sie | - | SOT173 | 8GHz schottky ring quad |
| 45 | BAT14-055S | Sie | - | SOT173 | 8GHz schottky diode |
| 45 | DTC124XE | Roh | N | EMT3 | npn dtr 22k+47k 50V 50mA |
| 45 | DTC124XKA | Roh | N | SC59 | npn dtr 22k+47k 50V 50mA |
| 45 | DTC124XUA | Roh | N | SC70 | npn dtr 22k+47k 50V 50mA |
| 450APH | PLVA450A | Phi | IB | SOD27 | Diode |
| 451 | FMMT451 | Zet | N | SOT23 | npn 60V 1A |
| 4531PH | 1N4531 | Phi | IB | SOD68 | Diode |
| 4532PH | 1N4532 | Phi | IB | SOD68 | Diode |
| 453APH | PLVA453A | Phi | IB | SOD27 | Diode |
| 455 | FMMT455 | Zet | N | SOT23 | NPN 140V 1A |
| 456APH | PLVA456A | Phi | IB | SOD27 | Diode |
| 458 | FMMT458 | Zet | N | SOT23 | npn 400V 0.4A |
| 459APH | PLVA459A | Phi | IB | SOD27 | Diode |
| 45APH | BAS45A | Phi | IB | SOD68 | Diode |
| 45D | BAT14-055D | Sie | - | SOT173 | 8GHz schottky dual |
| 45p | BAS40-05 | Phi | - | SOT23 | - |
| 45t | BAS40-05 | Phi | - | SOT23 | - |
| 45U | TK61045S | Tok | - | SOT23-5 | Voltage detector |
| 46 | BAS40-06 | Sie | B | SOT23 | dual cc BAS40 |
| 46 | BAS40-06W | Sie | B | SOT323 | dual cc BAS40 |
| 46 | MBT3946DW | Mot | DP | - | 2N3904/2N3906 pair |
| 462APH | PLVA462A | Phi | IB | SOD27 | Diode |
| 465APH | PLVA465A | Phi | IB | SOD27 | Diode |
| 468APH | PLVA468A | Phi | IB | SOD27 | Diode |
| 46p | BAS40-06 | Phi | - | SOT23 | - |
| 46t | BAS40-06 | Phi | - | SOT23 | - |
| 47 | BAS40-07 | Sie | S | SOT143 | dual BAS40 |
| 47 | BAS40-07W | Sie | S | - | dual BAS40 |
| 470PH | BZD23-C470 | Phi | IB | SOD81 | Zener Diode |
| 470PH | BZD27-C470 | Phi | IA | SOD87 | Zener Diode |
| 471 | PZM4.7NB1 | Phi | C | SOT346 | 4.7V 0.3W zener |
| 47-16PH | BYD47-16 | Phi | IA | SOD87 | Diode |
| 47-18PH | BYD47-18 | Phi | IA | SOD87 | Diode |
| 472 | PZM4.7NB2 | Phi | C | SOT346 | 4.7V 0.3W zener |
| 47-20PH | BYD47-20 | Phi | IA | SOD87 | Diode |
| 4728AP | 1N4728A | Phi | IB | SOD66 | Diode |
| 4729AP | 1N4729A | Phi | IB | SOD66 | Diode |
| 473 | PZM4.7NB3 | Phi | C | SOT346 | 4.7V 0.3W zener |
| 4730AP | 1N4730A | Phi | IB | SOD66 | Diode |
| 4731AP | 1N4731A | Phi | IB | SOD66 | Diode |
| 4732AP | 1N4732A | Phi | IB | SOD66 | Diode |
| 4733AP | 1N4733A | Phi | IB | SOD66 | Diode |
| 4734AP | 1N4734A | Phi | IB | SOD66 | Diode |
| 4735AP | 1N4735A | Phi | IB | SOD66 | Diode |
| 4736AP | 1N4736A | Phi | IB | SOD66 | Diode |
| 4737AP | 1N4737A | Phi | IB | SOD66 | Diode |
| 4738AP | 1N4738A | Phi | IB | SOD66 | Diode |
| 4739AP | 1N4739A | Phi | IB | SOD66 | Diode |
| 4740AP | 1N4740A | Phi | IB | SOD66 | Diode |
| 4741AP | 1N4741A | Phi | IB | SOD66 | Diode |
| 4742AP | 1N4742A | Phi | IB | SOD66 | Diode |
| 4743AP | 1N4743A | Phi | IB | SOD66 | Diode |
| 4744AP | 1N4744A | Phi | IB | SOD66 | Diode |
| 4745AP | 1N4745A | Phi | IB | SOD66 | Diode |
| 4746AP | 1N4746A | Phi | IB | SOD66 | Diode |
| 4747AP | 1N4747A | Phi | IB | SOD66 | Diode |
| 4748AP | 1N4748A | Phi | IB | SOD66 | Diode |
| 4749AP | 1N4749A | Phi | IB | SOD66 | Diode |
| 47p | BAS40-07 | Phi | - | SOT143B | - |
| 47PH | BZD23-C47 | Phi | IB | SOD81 | Zener Diode |
| 47PH | BZD27-C47 | Phi | IA | SOD87 | Zener Diode |
| 47V | PZM47NB | Phi | - | SOT346 | Zener Diode |
| 47Y | BZV49-C47 | Phi | - | SOT89 | Zener Diode |
| 49 | BAT14-095R | Sie | - | SOT173 | 18GHz schottky ring quad |
| 49 | BAT14-095S | Sie | - | SOT173 | 18GHz shottky diode |
| 491 | FMMT491 | Zet | N | SOT23 | ZTX 450/451 |
| 493 | FMMT493 | Zet | N | SOT23 | ZTX 453 |
| 494 | FMMT494 | Zet | N | SOT23 | npn 120V 1A |
| 495 | FMMT495 | Zet | N | SOT23 | npn 170V 1A |
| 497 | FMMT497 | Zet | N | SOT23 | npn 300V 0.5A |
| 49D | BAT14-095D | Sie | - | SOT173 | 18GHz schottky dual |
| 4A | BC859A | ITT | N | SOT23 | BC559A |
| 4A | FMMV109 | Zet | C | SOT23 | MV209 varicap |
| 4A | HD3A | Zet | C | - | 75V 100mA sw diode |
| 4A | MMBV109 | Mot | C | SOT23 | MV209 varicap |
| 4A3 | PZM4.3NB2A | Phi | - | SOT346 | Zener Diode |
| 4A7 | PZM4.7NB2A | Phi | - | SOT346 | Zener Diode |
| 4Ap | BC859A | Phi | - | SOT23 | - |
| 4AR | BC859AR | Phi | R | SOT23 | BC559A |
| 4As | BC859A | Sie | N | SOT23 | BC559A |
| 4As | BC859AW | Sie | N | SOT323 | BC559A |
| 4At | BC859AW | Phi | - | SOT323 | - |
| 4B | BC859B | ITT | N | SOT23 | BC559B |
| 4B | MMBV432 | Mot | B | - | dual cc varicap 1.5-45pF |
| 4B- | BC859BW | Phi | - | SOT323 | - |
| 4Bp | BC859B | Phi | - | SOT23 | - |
| 4BR | BC859BR | Phi | R | SOT23 | BC559B |
| 4Bs | BC859B | Sie | N | SOT23 | BC559B |
| 4Bs | BC859BW | Sie | N | SOT323 | BC559B |
| 4Bt | BC859B | Phi | - | SOT23 | - |
| 4Bt | BC859BW | Phi | - | SOT323 | - |
| 4C | BC859C | Phi | N | SOT23 | BC559C |
| 4C | MMVB3102 | Mot | C | SOT23 | varicap 6-35pF |
| 4C- | BC859CW | Phi | - | SOT323 | - |
| 4Cp | BC859C | Phi | - | SOT23 | - |
| 4CR | BC859CR | Phi | R | SOT23 | BC559C |
| 4Cs | BC859C | Sie | N | SOT23 | BC559C |
| 4Cs | BC859CW | Sie | N | SOT323 | BC559C |
| 4Ct | BC859C | Phi | - | SOT23 | - |
| 4Ct | BC859CW | Phi | - | SOT323 | - |
| 4D | BC859B | Phi | N | SOT23 | BC559B |
| 4D | HD3A | Zet | C | SOT23 | sw diode 75V 100mA |
| 4D | MMBV3401 | Mot | C | SOT23 | VHF pin diode |
| 4D- | BC859W | Phi | - | SOT323 | - |
| 4Dp | BC859 | Phi | - | SOT23 | - |
| 4Dt | BC859W | Phi | - | SOT323 | - |
| 4E | BC860A | Phi | N | SOT23 | BC560A |
| 4E | FMMT-A92 | Zet | N | SOT23 | MPSA92 |
| 4E | MMBV105G | Mot | C | SOT23 | MV105 varicap |
| 4Ep | BC860A | Phi | - | SOT23 | - |
| 4ER | BC860AR | Phi | R | SOT23 | BC560A |
| 4Et | BC860AW | Phi | - | SOT323 | - |
| 4F | BC860B | Phi | N | SOT23 | BC560B |
| 4F | Gali-4F | MCs | AZ | SOT89 | DC-4GHz MMIC amp 15 dBm o/p |
| 4F | MMBD353 | Mot | Z | SOT23 | dual MBD101 |
| 4F- | BC860BW | Phi | - | SOT323 | - |
| 4Fp | BC860B | Phi | - | SOT23 | - |
| 4FR | BC860BR | Phi | R | SOT23 | BC560B |
| 4Fs | BC860B | Sie | N | SOT23 | BC560B |
| 4Fs | BC860BW | Sie | N | SOT323 | BC560B |
| 4Ft | BC860B | Phi | - | SOT23 | - |
| 4Ft | BC860BW | Phi | - | SOT323 | - |
| 4G | BC860C | Phi | N | SOT23 | BC560C |
| 4G | MMBV2101 | Mot | C | SOT23 | MV2101 varicap |
| 4G- | BC860CW | Phi | - | SOT323 | - |
| 4Gp | BC860C | Phi | - | SOT23 | - |
| 4GR | BC860CR | Phi | R | SOT23 | BC560CR |
| 4Gs | BC860C | Sie | N | SOT23 | BC560C |
| 4Gs | BC860CW | Sie | N | SOT323 | BC560C |
| 4Gt | BC860C | Phi | - | SOT23 | - |
| 4Gt | BC860CW | Phi | - | SOT323 | - |
| 4H | MMBV2103 | Mot | C | SOT23 | MV2103 varicap |
| 4H- | BC860W | Phi | - | SOT323 | - |
| 4Hp | BC860 | Phi | - | SOT23 | - |
| 4Ht | BC860W | Phi | - | SOT323 | - |
| 4J | FMMT38A | Zet | N | SOT23 | BCX38A |
| 4J | MMBV2109 | Mot | C | SOT23 | MV2109 varicap |
| 4K | BAP64-04 | Phi | D | - | dual series 3GHz pin diode |
| 4K | MMSB3000 | Mot | I | SOD123 | Si diode 30V 0.2A |
| 4L | BAP50-04 | Phi | D | - | dual series GP RF pin diode |
| 4M | MMBD101 | Mot | C | SOT23 | MBD101 schottky diode |
| 4Ms | BAT240A | Sie | EQ | SOT143 | dual schottky 250V 0.4A |
| 4O | 2SA1721-O | Tos | - | SOT23 | Si pnp |
| 4P | CMDZ24L | CSC | I | SMC | 24V Zener Diode |
| 4R | 2SA1721-R | Tos | - | SOT23 | Si pnp |
| 4R | MMBV3700 | Mot | C | SOT23 | 200V vhf pin diode |
| 4S | MMBD201 | Mot | C | SOT23 | MBD201 |
| 4T | MMBD301 | Mot | C | SOT23 | MBD301 UHF schottky diode |
| 4t8 | PUMD48 | Phi | - | SOT363 | - |
| 4U | MMBV2105 | Mot | C | SOT23 | MV2105 varicap |
| 4V | BCW65AR | Zet | R | SOT23 | npn 32V 0.8A |
| 4V | MMBV2106 | Mot | C | SOT23 | MV2106 varicap |
| 4V3 | PZM4.3NB | Phi | - | SOT346 | Zener Diode |
| 4V3PH | BZD23-C4V3 | Phi | IB | SOD81 | Zener Diode |
| 4V3PH | BZD27-C4V3 | Phi | IA | SOD87 | Zener Diode |
| 4V7 | PZM4.7NB | Phi | - | SOT346 | Zener Diode |
| 4V7PH | BZD23-C4V7 | Phi | IB | SOD81 | Zener Diode |
| 4V7PH | BZD27-C4V7 | Phi | IA | SOD87 | Zener Diode |
| 4W | BCW67AR | Zet | R | SOT23 | pnp 32V 0.8A |
| 4W | MMBV2107 | Mot | C | SOT23 | MV2107 varicap |
| 4X | MMBV2108 | Mot | C | SOT23 | MV2108 varicap |
| 4Y | MMBV2102 | Mot | C | SOT23 | MV2102 varicap |
| 4Y3 | BZV49-C4V3 | Phi | - | SOT89 | Zener Diode |
| 4Y7 | BZV49-C4V7 | Phi | - | SOT89 | Zener Diode |
| 4Z | MMBV2104 | Mot | C | SOT23 | MV2104 varicap |
