Compare the candidate package with the outline, pin count and polarity mark on the actual board.
SMD Marking
H4
Possible components matching this marking.A marking is not a guaranteed identification by itself.
16possible components
VERY HIGHambiguity level
Filters16 candidates
Narrow the list using the package, manufacturer or component family printed on the board.
16 possible components
Results are ordered by the available marking evidence.
1 SM-1 XH042 evidence sources Unknown manufacturer (ORG) axial1 DIODE HIGH2 sources Gleichrichter, S | Si-DiManufacturer hint: Unknown manufacturer (ORG) 2 IMH 4(A)2 evidence sources ROHM Semiconductor smd1 TRANSISTOR HIGH2 sources SMD, Dual, int. Rb=10kOhm | Si-NManufacturer hint: ROHM Semiconductor 3 HVM 121WK2 evidence sources Hitachi smd2 DIODE HIGH2 sources SMD, Dual | Si-DiManufacturer hint: Hitachi 4 RN 2905FS2 evidence sources Toshiba smd1 TRANSISTOR HIGH2 sources SMD,Transistor Silicon PNP Epitaxial Type, 20V 50mA 50mW | Si-P+RManufacturer hint: Toshiba 5 BCW 69R2 evidence sources Unknown manufacturer (FER) / Philips Semiconductors / SGS / Motorola / Samsung Semiconductor / Valvo / National Semiconductor / KEC Semiconductor smd2 TRANSISTOR HIGH2 sources SMD, NF | Si-PManufacturer hint: Unknown manufacturer (FER) / Philips Semiconductors / SGS / Motorola / Samsung Semiconductor / Valvo / National Semiconductor / KEC Semiconductor 6 UMH 4N2 evidence sources ROHM Semiconductor smd1 TRANSISTOR HIGH2 sources SMD, 2x DTC114T, Dual Digital Transistor | Si-N+RManufacturer hint: ROHM Semiconductor 7 IMH 4A2 evidence sources ROHM Semiconductor smd1 TRANSISTOR HIGH2 sources SMD, 2x DTC114T, Dual Digital Transistor | Si-N+RManufacturer hint: ROHM Semiconductor 8 PZU 3.6B22 evidence sources Philips Semiconductors dil1 DIODE HIGH2 sources SMD, Voltage regulator diode, 3.6V | Z-DiManufacturer hint: Philips Semiconductors 9 EMH 42 evidence sources ROHM Semiconductor smd1 TRANSISTOR HIGH2 sources SMD, 2x DTC114T, Dual Digital Transistor | Si-N+RManufacturer hint: ROHM Semiconductor 10 MMSZ 52442 evidence sources Vishay smd1 DIODE HIGH2 sources SMD, Silicon Planar Zener Diode | Z-DiManufacturer hint: Vishay 11 F 1 H42 evidence sources Unknown manufacturer (ORG) smd1 DIODE HIGH2 sources SMD, Gleichrichter, S | Si-DiManufacturer hint: Unknown manufacturer (ORG) 12 F 1 H42 evidence sources Unknown manufacturer (ORG) dil1 DIODE HIGH2 sources SMD, Gleichrichter, S | Si-DiManufacturer hint: Unknown manufacturer (ORG) 13 BZX 585-C8V22 evidence sources Philips Semiconductors smd1 DIODE HIGH2 sources SMD, Voltage regulator diode, 5% Tolerance, 8,2V | Z-DiManufacturer hint: Philips Semiconductors 14 2SC 3134-42 evidence sources Sanyo Semiconductor smd2 TRANSISTOR HIGH2 sources SMD, hi-Ueb | Si-NManufacturer hint: Sanyo Semiconductor 15 2SA 956-H42 evidence sources NEC (Nippon Electric Company) smd2 TRANSISTOR HIGH2 sources SMD, Uni | Si-PManufacturer hint: NEC (Nippon Electric Company) 16 SST 54842 evidence sources Siliconix smd2 FET HIGH2 sources SMD | Si-NManufacturer hint: Siliconix
Safe identification
How to verify this result
Check the official datasheet for pinout, voltage, current and thermal ratings—not only the marking.
Do not treat a short marking, a low-confidence candidate or a family match as a drop-in replacement.