MC78M05CTG

LM7805CT is a former Fairchild 5 V / 1 A positive three-terminal linear regulator in TO-220, tube packaging — fixed 5 V output, up to 35 V input, internal short-circuit current limiting, thermal overload protection and safe-area protection, which is why the 78xx series became the default 5 V rail in legacy equipment, Arduino-era boards and repair work. The built-in protection is the selection point: no external components are needed for a rugged 5 V supply, and the TO-220 tab bolts to a heatsink for continuous high-current service. Selection advice: onsemi lists LM7805CT as Discontinued (product discontinuance notice PD22098X, Q4 2017) — for new builds order the suggested direct replacement MC7805CTG (Pb-free, Active), which keeps the same TO-220 footprint and 5 V / 1 A rating. Any LM7805CT offer is end-of-life stock: require date-code traceability and check for remarked parts. Evidence: onsemi PDN records and distributor listings confirm the discontinued status of LM7805CT, the MC7805CTG replacement, 5 V / 1 A and TO-220. Match the full code. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

FDC6324L is an onsemi integrated load switch in SuperSOT-6 - for high-side power switching of computer peripherals, portable equipment and subsystem rails. It integrates a small N-channel MOSFET driving a large P-channel MOSFET in one tiny 6-pin package, handling a 3V to 20V input at up to 1A load current, with a typical conduction drop of only 0.135V at 1A. The business case is parts-count and board space: one device replaces a discrete MOSFET pair plus its gate-drive network, and the 1.5V to 8V ON/OFF control interfaces directly with low-voltage logic. Evidence: onsemi lists FDC6324L as Active with an official datasheet, and off-state leakage is specified at 1uA maximum, so switched-off rails draw almost nothing in standby. Selection advice: this is an integrated load switch, not a standalone MOSFET - order and qualify it as a switch, and note that an external resistor is required to turn the P-channel device off; add the optional soft-start resistor and capacitor when the load has large input capacitance, to limit inrush; for a different current or drop target, compare the sibling FDC6326L before committing. Heat basis: Ranked #5 on hqbuy.com real-time hot list (2026-10-15). Parameters verified against onsemi documentation. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

MC34063ADR2G is an onsemi MC34063A-series buck/boost/inverting switching regulator in SOIC-8, tape and reel — for cost-sensitive auxiliary rails, LED drivers and legacy industrial boards where one jelly-bean part must cover step-up, step-down or inverting topologies. 3 V to 40 V input, adjustable 1.25 V to 40 V output and a 1.5 A internal switch is the selection point: one BOM line that adapts to whatever rail the board needs. Selection advice: the D suffix denotes SOIC-8 for SMT assembly; R2G denotes tape and reel. The 1.5 A rating is the switch current, not the output current — in boost and inverting topologies the available output current is lower, so size the inductor and diode for your topology rather than the headline number. This is a non-synchronous part: cheaper and simpler than modern synchronous bucks, but less efficient — for battery-powered designs, compare it against a synchronous alternative. If you only need step-down at higher current, the TI LM2596S-ADJ/NOPB (3 A, 150 kHz buck) on this site is the proven larger sibling; if you need boost or inverting, the MC34063A remains the flexible choice. Commercial 0 °C to 70 °C grade — for automotive temperature and qualification, ask about the onsemi NCV-prefixed series. onsemi lists this part as Active. Parameters verified against distributor and manufacturer documentation. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

NCP1117ST33T3G is an onsemi NCP1117 fixed 3.3 V low-dropout linear regulator — 1.0 A, 1.07 V typical dropout (1.2 V maximum at 800 mA), in SOT-223, tape-and-reel packing of 4000, 4.75 to 20 V input, 0 to +125 °C. The ±1.0% trimmed output with no minimum load requirement on the fixed version is the selection point: a dependable 3.3 V point-of-load rail that stays in regulation with no load attached, unlike adjustable regulators that need a minimum current. Selection advice: this is the commercial-temperature, 1 A workhorse — for -40 °C operation or 1.5 A, step up to the LD1086 family; for adjustable output, the LM317 costs less but needs about 2 V of dropout and two resistors. The 10 mA quiescent current rules out micropower sleep designs — for always-on battery rails choose a 1.6 µA-class part like the MCP1700 instead. Current limit, safe-area compensation and thermal shutdown are built in. Distributor listings show this code Active. Evidence: onsemi NCP1117 datasheet and DigiKey/Newark listings confirm 3.3 V, 1 A, 1.07 V dropout, SOT-223 and reel packing. Match the full NCP1117ST33T3G code. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

NCP1654BD65R2G is an onsemi continuous-conduction-mode (CCM) power-factor-correction controller, fixed 65 kHz switching, in SOIC-8 — the PFC front end for 100 W+ AC-DC supplies in PCs, adapters and industrial power. The fixed-frequency average-current CCM architecture is the selection point: lower peak currents and easier EMI filtering than critical-conduction-mode controllers at these power levels, with 97% maximum duty cycle for wide-input designs. Selection advice: the D65 code fixes the oscillator at 65 kHz (D133/D200 variants run faster for smaller magnetics) — match the frequency to your inductor and EMI plan, since the three variants are otherwise pin-compatible. It integrates brown-out detection, overvoltage protection and inrush-current detection, but the power stage (MOSFET, boost diode, inductor) is external and must be designed per the onsemi application notes. The R2G suffix is tape-and-reel (2500) Pb-free packing. Parameters verified against the onsemi NCP1654 datasheet and Newark listings. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

NCP551SN33T1G is an onsemi 150 mA CMOS low-dropout regulator in SOT-23-5 — for battery-powered instruments and handheld equipment needing micropower regulation. Fixed 3.3 V ±2%, 12 V maximum input, 4 µA typical quiescent current, enable input, over-current and thermal protection. Heat evidence: onsemi broad-range pricing actions effective October 2026 cover the LDO portfolio — locking current distributor pricing on this line is prudent. Selection advice: the SN suffix is SOT-23-5 (5-TSOP) on reel — the NCV551 prefix is the AEC-Q100 automotive variant; do not confuse with NCP551SN33T3G which is not a valid ordering code. Parameters verified against onsemi documentation. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

NCV1117ST33T3G is an onsemi 1 A low-dropout regulator in SOT-223 — for automotive and industrial point-of-load regulation. Fixed 3.3 V ±1%, up to 20 V input, 1.2 V maximum dropout at 800 mA, current limit and thermal shutdown, AEC-Q100 qualified. Heat evidence: onsemi automotive-grade chips remain on extended lead times with firm pricing — Best Components reports continued tightness in onsemi automotive supply. Selection advice: the NCV prefix is the automotive-qualified version of the NCP1117 — the ST suffix is SOT-223; for higher current use the D²PAK DT variant. Parameters verified against distributor and onsemi documentation. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

UC2842BD1R2G is an onsemi current-mode PWM controller in SOIC-8 — for offline and DC-DC power supplies: flyback adapters, boost converters and industrial power modules. 10 V to 30 V VCC, switching up to 500 kHz, 96% maximum duty cycle, -25°C to +85°C operating range. Heat evidence: onsemi portfolio-wide price increase effective October 2026 — classic PWM controllers are staple inventory for power supply manufacturers building buffer stock. Selection advice: the B suffix means tighter UVLO thresholds than the UC2842A — specify the B variant when predictable startup behavior matters; the D1R2G code is SOIC-8 on tape and reel. Parameters verified against onsemi documentation. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

UC3843BD1R2G is an onsemi high-performance current-mode PWM controller in SOIC-8 — trimmed oscillator with precise frequency control, up to 275 kHz switching, 96% maximum duty cycle, low-voltage UVLO tailored for DC-DC converters (versus the 16 V/10 V UVLO of the UC3842 off-line version), 1 A totem-pole output for driving power MOSFETs, cycle-by-cycle current limiting, 30 V maximum supply, tape-and-reel packing (R2G, 2500/reel), 0 to +70 °C, Active status. The low-voltage UVLO is the selection point: the 3 in UC3843 marks the lower startup threshold versus UC3842 — choose this for DC-DC converters and the UC3842 for off-line mains supplies. Selection advice: the B series is the updated UC3843B family; the D1R2G suffix is the SOIC-8 reel code — match the full UC3843BD1R2G code. A single RC network sets the oscillator frequency. Evidence: onsemi UC3842B/UC3843B datasheet and distributor listings confirm current-mode PWM, 275 kHz, 96% duty, SOIC-8 and reel packing. Match the full UC3843BD1R2G code. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

5 V 1.5 A positive linear voltage regulator with 2% output tolerance, thermal overload and short-circuit protection, in TO-220. Manufacturer status: active. The L7805 is the archetypal 5 V rail: built-in thermal and short-circuit protection makes it nearly indestructible in the field, which is why it remains the default choice for simple, robust 5 V supplies. Selection advice: the CV suffix denotes this package and grade configuration — the L78 family spans many output voltages and packages that are not interchangeable, so match the full L7805CV code to your footprint. At 1.5 A with a large dropout, heatsinking is mandatory — verify your thermal design, or choose a switching regulator where efficiency matters. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

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