AEC-Q101 qualified complementary pair for automotive loads
The Toshiba HN1B04FE-Y,LXHF is an automotive-grade complementary transistor pair integrating one NPN and one PNP device in a single SOT-563 or SOT-666 surface-mount package. This is the distinction between 'automotive-capable' and 'automotive-qualified'; the OEM auditor will ask for the AEC-Q101 report, and this part has one.
50V VCEO, 150mA Ic — sizing for 12V/24V bus loads
Collector-emitter breakdown is rated at 50V minimum, giving 2:1 derating margin on a 12V automotive rail and comfortable headroom on 24V truck systems. The 150mA maximum collector current per transistor covers solenoid pre-drive, relay coil drive, and logic-level signal switching. Vce(sat) is specified at 250mV (NPN) and 300mV (PNP) at 10mA base / 100mA collector — a tight saturation voltage that keeps conduction losses low in the pre-drive stage.
80MHz transition frequency — fast enough for PWM pre-drive
With an 80MHz fT, this pair handles PWM frequencies well above the audio band and into the hundreds of kilohertz. For a 20kHz automotive PWM pre-drive stage, the gain-bandwidth is more than sufficient; the part will not introduce phase lag or switching loss at those frequencies.
SOT-563/SOT-666 — two footprints, one BOM position
The package listing covers both SOT-563 and SOT-666 case outlines. These are near-identical footprints (the SOT-666 has a slightly wider body), but both share the same 6-pin ES6 supplier device package code. A PCB laid out for the SOT-563 land pattern will accept either variant, which gives the BOM some sourcing flexibility. The surface-mount assembly is standard reflow; no special profile needed.
100nA cutoff — leakage floor matters in battery-connected designs
The collector cut-off current is a maximum of 100nA (ICBO). In an automotive ECU that stays powered during key-off, that leakage is negligible against the module's sleep budget. The 100mW maximum power dissipation per package limits continuous current in still air; for a pre-drive stage switching at low duty cycle, the thermal margin is adequate.