1N4004

1N4002 is a 1 A standard-recovery rectifier diode from the 1N400x family — 100 V repetitive peak reverse voltage, 1 A average forward current, 30 A surge capability, axial DO-41 (DO-204AL) package, 1.1 V maximum forward voltage, -65 to +150 °C. The 100 V rating is the selection point: the economical choice for low-voltage rectifiers, relay flyback clamps and reverse-polarity protection where high blocking voltage is unnecessary. Selection advice: pick the voltage grade to match your peak reverse voltage with margin — 1N4004 (400 V) or 1N4007 (1000 V) are the higher-voltage neighbors in the same DO-41 footprint. For switching supplies use an ultrafast type like UF5408 instead, since this is a standard-recovery part. Evidence: Vishay 1N4001–1N4007 datasheet confirms 1 A, 100 V, 30 A surge, DO-41 and 1.1 V forward voltage. Match the full 1N4002 code — the digit sets the voltage rating. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

1N4003 is a general-purpose 1 A rectifier diode in DO-41 — 200 V repetitive peak reverse voltage, 1 A average rectified current, 30 A non-repetitive surge, 1.1 V maximum forward voltage at 1 A, 5 µA reverse leakage, -65 to +150 °C, through-hole axial. The 200 V rating is the selection point: the mid-voltage member of the 1N400x family — choose this grade when your circuit never sees more than 200 V, and step up to the 1N4007 for higher-voltage margins. Selection advice: standard recovery (>500 ns) suits mains-frequency rectification only, not fast switching — use an ultrafast diode for switch-mode outputs. The silver band marks the cathode. Evidence: manufacturer datasheets and distributor listings confirm 200 V, 1 A, 30 A surge and DO-41. Match the full 1N4003 code for voltage grade. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

1N4005 is a 1 A standard-recovery rectifier diode from the 1N400x family — 600 V repetitive peak reverse voltage, 1 A average forward current, 30 A surge capability, axial DO-41 (DO-204AL) package, 1.1 V maximum forward voltage, -65 to +150 °C. The 600 V rating is the selection point: the middle of the 1N4001–1N4007 voltage ladder, for mains-derived rectifiers, relay flyback clamps and reverse-polarity protection. Selection advice: pick the voltage grade to match your peak reverse voltage with margin — 1N4004 (400 V) or 1N4007 (1000 V) are the neighbors in the same DO-41 footprint. For switching supplies use an ultrafast type like UF5408 instead, since this is a standard-recovery part. Evidence: Vishay 1N4001–1N4007 datasheet confirms 1 A, 600 V, 30 A surge, DO-41 and 1.1 V forward voltage. Match the full 1N4005 code — the digit sets the voltage rating. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

1N4006 is a general-purpose 1 A rectifier diode in DO-41 — 800 V repetitive peak reverse voltage, 1 A average rectified current, 30 A non-repetitive surge, 1.1 V maximum forward voltage at 1 A, 5 µA reverse leakage, -65 to +150 °C, through-hole axial. The 800 V rating is the selection point: the mid-voltage member of the 1N400x family — choose this grade when your circuit never sees more than 800 V, and step up to the 1N4007 for higher-voltage margins. Selection advice: standard recovery (>500 ns) suits mains-frequency rectification only, not fast switching — use an ultrafast diode for switch-mode outputs. The silver band marks the cathode. Evidence: manufacturer datasheets and distributor listings confirm 800 V, 1 A, 30 A surge and DO-41. Match the full 1N4006 code for voltage grade. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

1N4007 is a 1 A, 1000 V general-purpose rectifier diode in a DO-41 axial package — the default choice for mains-frequency rectification, reverse-polarity protection and freewheeling in low-frequency circuits. Its advantage is the 1000 V rating at commodity pricing: one part number covers the full range of offline and low-voltage rectification tasks, simplifying spares. Selection advice: the 1N400x family spans 50 V (1N4001) to 1000 V (1N4007) in the same package — a lower-voltage sibling looks identical but will fail in a high-voltage circuit, so match the full 1N4007 code. For switching supplies above a few kHz, choose a fast-recovery type like the FR107 or UF4007 instead; standard-recovery diodes overheat at high frequency. As a jellybean part, require lot traceability against remarked stock. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

Diotec lists 1N5408 as active — a standard-recovery rectifier diode, VRRM 1000 V, IFAV 3 A, axial DO-201 package, 175 °C junction temperature. The 3 A rating is the selection point: where the 1 A 1N4007 runs out of headroom, the 1N5408 handles higher-current rectification in power supplies and battery chargers without moving to a larger package class. Selection advice: the 1N540x family spans multiple voltage ratings in the same DO-201 package — match the full 1N5408 code, since a lower-voltage sibling is visually identical. Standard recovery suits mains-frequency use only; for switching converters choose fast or ultrafast types. Parameters verified against the Diotec official product page. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

1N4001 is an onsemi standard rectifier diode — VRRM 50 V, 1 A average rectified current, DO-41 axial package. The 1N400x family is the selection point: the cheapest diode on earth for mains-frequency rectification and reverse-polarity protection — a jellybean part every lab stocks by the thousand. Selection advice: the 1N4001 is the 50 V bottom grade of the 1N4001–1N4007 family (50 V to 1000 V, same DO-41 package) — for mains work always specify the 1N4007 (1000 V); the 1N4001 suits low-voltage rails only. For switching supplies above a few kHz use a fast-recovery type instead — standard recovery overheats at high frequency. onsemi lists the 1N4001 as Active. Evidence: distributor data confirms onsemi 1N4001 Active, 50 V, 1 A, DO-41. Match the full 1N4001 code — siblings look identical. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

2N3904 is the industry-standard NPN small-signal transistor — 40 V / 200 mA in TO-92 — for general-purpose amplification and switching: preamp stages, LED drivers, and logic-level interfacing. hFE spans 100–300 at 10 mA with a 300 MHz transition frequency, covering audio through low-VHF work. Selection advice: the complementary PNP is 2N3906 (same 40 V / 200 mA / TO-92) for push-pull and complementary driver stages. For SMD boards the direct equivalent is MMBT3904 in SOT-23 — the same die, already in this catalog. Diotec ships this part in ammo pack; if your line runs tape-and-reel, confirm the packing code on the quote. Do not confuse with the PN2222A: the 2N3904 tops out at 200 mA while the PN2222A handles 1 A — they share a footprint but not a current rating. Parameters trace to the manufacturer datasheet; state quantity, packing and date-code requirements in your RFQ — we reconfirm the offered lot before quotation and reply within 24 hours.

2N4401 is an onsemi NPN silicon general-purpose transistor — 40 V collector-emitter voltage, 600 mA continuous collector current, DC current gain of 100 minimum at 150 mA, 250 MHz transition frequency, TO-92 package, 625 mW dissipation, -55 to +150 °C. The complementary pairing is the selection point: the NPN counterpart of the 2N4403 PNP for push-pull, H-bridge and complementary switching stages. Selection advice: for a complementary pair order the 2N4403 (PNP) alongside this 2N4401 (NPN) — they share ratings for symmetric drive. The 625 mW dissipation limits continuous high-current use, so size the load or add a driver for power switching. Evidence: onsemi 2N4401 datasheet and distributor listings confirm NPN, 40 V, 600 mA, hFE 100, 250 MHz and TO-92. Match the full 2N4401 code. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

2N4403 is a Diotec PNP silicon switching transistor — 40 V collector-emitter voltage, 600 mA continuous collector current, DC current gain of 100 to 300, 200 MHz transition frequency, TO-92 package, 625 mW dissipation, -65 to +150 °C. The PNP complement pairing is the selection point: the PNP counterpart of the 2N4401 NPN for push-pull, H-bridge and complementary switching stages. Selection advice: for a complementary pair order the 2N4401 (NPN) alongside this 2N4403 (PNP) — they share ratings for symmetric drive. The 625 mW dissipation limits continuous high-current use, so size the load or add a driver for power switching. Diotec lists 2N4403 as Active. Evidence: Diotec 2N4403 datasheet and distributor listings confirm PNP, 40 V, 600 mA, hFE 100-300, 200 MHz and TO-92. Match the full 2N4403 code. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.