Parts comparison
Compare electronics parts
Put up to four catalogue parts side by side. BananaBoard shows exact structured values, their conditions and sources—and keeps unknown or inapplicable fields explicit.
Choose 2–4 parts
Values come directly from the source-cited catalogue. Unknown is kept unknown; this tool does not infer compatibility.
Structured comparison
Conditions and source links stay attached to each value. No automatic winner is declared.
Overview
Manufacturer
- BC547
- onsemi
- IRLZ44N
- Infineon Technologies
Category
- BC547
- Transistor
- IRLZ44N
- MOSFET
Object type
- BC547
- discrete
- IRLZ44N
- discrete
Package
- BC547
- TO-92
- IRLZ44N
- TO-220
Documented pins
- BC547
- 3
- IRLZ44N
- 3
Interfaces
- BC547
- Digital
- IRLZ44N
- Digital
Lifecycle
- BC547
- ACTIVE
- IRLZ44N
- ACTIVE
Physical pin mapping
- BC547
- Unknown
- IRLZ44N
- Unknown
Browser simulation
- BC547
- Not available
- IRLZ44N
- Not available
Electrical
Channel
- BC547
- Not applicable
- IRLZ44N
Type
- BC547
- bjt-npnSource
- IRLZ44N
- Not applicable
Max Vceo
- BC547
- 45 VSource
Collector-emitter breakdown with the base open. The BC546 variant is the 65V part if you need more.
- IRLZ44N
- Not applicable
Max Vds
- BC547
- Not applicable
- IRLZ44N
- 55 VSource
Max Ic
- BC547
- 100 mASource
Continuous collector current. This is a hard ceiling — for anything approaching it, use a MOSFET.
- IRLZ44N
- Not applicable
Vgs Threshold
- BC547
- Not applicable
- IRLZ44N
- 1 – 2 V @ Vds: Vds = Vgs (diode-connected), Id=250 uASource
Threshold is only the onset of conduction, not a fully-on gate voltage. Use the RDS(on) test conditions to choose gate drive.
Max Vgs
- BC547
- Not applicable
- IRLZ44N
- Unknown
Rds(on)
- BC547
- Not applicable
- IRLZ44N
- 22 mΩ @ Vgs=10 V, Id=17 ASource
Still just 0.025Ω at Vgs=5V and 0.035Ω at Vgs=4V — this is what 'logic level' buys you: it stays low-resistance without a full 10V gate drive, unlike the IRF540N.
Continuous Id
- BC547
- Not applicable
- IRLZ44N
- 47 A @ Tcase=25 °CSource
Drops off sharply with case temperature — don't expect anywhere near 47A without a heatsink and good PCB copper.
Gate Charge
- BC547
- Not applicable
- IRLZ44N
- Unknown
Logic Level
- BC547
- Not applicable
- IRLZ44N
- YesSource
Performance
hFE (gain)
- BC547
- 110 – 800 @ Ic=2 mA, Vce=5 VSource
Spread across the whole family. Grouped by suffix: A is 110–220, B is 200–450, C is 420–800. Design the base resistor against the LOW end of your group, never the typical — gain varies part to part and falls as Ic rises.
- IRLZ44N
- Not applicable
Transition Frequency
- BC547
- 300 MHz @ Ic=10 mA, Vce=5 VSource
- IRLZ44N
- Not applicable
Physical
Thermal
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