Frequently Asked Questions

Which is better for SMD component testing — the LCR-P1 or the LCR-ST1?

The LCR-ST1 is hands-down better for SMD work. It comes with two types of tweezer heads (pointed and hook) that let you grab tiny surface-mount components easily, and it tests at up to 10kHz for precise readings on small capacitors and inductors. The LCR-P1 can test SMD parts using its replaceable patch seat, but it’s clunkier for that kind of work. If you primarily repair circuit boards with tiny components, get the LCR-ST1.

Does the LCR-P1 test MOSFETs and transistors? Does the LCR-ST1 do the same?

The LCR-P1 absolutely tests MOSFETs, NPN, PNP, and field effect transistors — that’s its main strength. It automatically identifies pin definitions and parameters for these components, which saves me a ton of time. The LCR-ST1, on the other hand, is strictly an LCR meter and diode tester — it won’t identify or test transistors or MOSFETs at all. If you work with semiconductors, the LCR-P1 is your only choice here.

Which tester has better accuracy for measuring capacitors and inductors?

The LCR-ST1 wins on accuracy because it offers three test frequencies (100 Hz, 1 kHz, and 10 kHz) and two test voltages (0.3 Vrms and 0.6 Vrms), which lets me dial in the right settings for different components. The LCR-P1 is more of a quick identifier than a precision measurement tool. For measuring capacitor ESR or inductor values with confidence, I reach for the LCR-ST1 every time.

Is the LCR-ST1 worth paying more than the LCR-P1?

That depends entirely on what you’re testing. The LCR-ST1 costs a bit more, but you’re paying for the tweezer design, higher test frequency, and data export to Excel — features that matter if you do SMD repairs or need documentation. The LCR-P1 is cheaper and tests way more component types including transistors and MOSFETs. I wouldn’t say one is “worth more” — they’re built for different jobs.

Can I use the LCR-P1 to test capacitors without damaging them?

Yes, and this is actually one of my favorite features. The LCR-P1 has an anti-burn protection mechanism that automatically detects if a capacitor is still charged and discharges it the moment you plug it in. This prevents accidental damage to both the component and the tester. The LCR-ST1 doesn’t have this feature, so you need to make sure your capacitors are discharged before testing with it.

Which one has better build quality and customer satisfaction?

Based on customer reviews, the LCR-ST1 has a higher satisfaction rating at 4.5 out of 5 stars from 298 ratings, compared to the LCR-P1’s 4.2 out of 5 stars from 715 ratings. The LCR-P1 has more reviews and is the #1 Best Seller in Capacitance & Resistance Meters with over 600 units bought in the past month, but some users mention accuracy inconsistencies. The LCR-ST1 feels more refined for its specific use case.