Klein Tools CL390
#3 in AC/DCFull review
An affordable true-RMS AC/DC clamp that suits DIY solar, automotive and general electrical work.
Amazon $86.27$86.27
The Klein Tools CL390 rates 3.7 among AC/DC clamp meters; the Fluke 302+ rates 3.0 among AC only ones. The Klein Tools CL390 costs $1.73 less ($86.27 vs $88).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Fluke 302+
#6 in AC onlyFull review
A basic AC clamp for occasional current checks on plain resistive and motor loads, at an entry price.
Amazon $88$88
Scores side by side
These two sit in different type classes (AC/DC and AC only), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Klein Tools CL390 | Fluke 302+ |
|---|---|---|
| Overall rating | 3.7/5 | 3.0/5 |
| Current range 15% | 46 400 A through the jaw | 46 400 A through the jaw |
| DC current 15% | 100 DC current to 400 A through the jaw | 0 no DC current |
| Safety rating 20% | 55 CAT III 600 V | 75 CAT IV 300 V / CAT III 600 V |
| Features 15% | 50 true RMS, non-contact voltage, temperature, DC microamps | 0 none of the listed features |
| Accuracy 10% | 67 2% of reading | 80 1.8% of reading |
| Jaw opening 5% | 70 41 mm jaw | 33 30 mm jaw |
| Warranty 10% | 50 2-year warranty | 50 2-year warranty |
| Price 10% | 76 $86.27 | 75 $88 |
Specifications
| Klein Tools CL390 | Fluke 302+ | |
|---|---|---|
| Measurement | ||
| AC current (jaw) | 400 A | 400 A |
| DC current (jaw) | 400 A | No |
| DC microamps (leads) | 200 uA | - |
| Voltage | 600 V | 600 V |
| Current accuracy | 2% of reading | 1.8% of reading |
| Jaw opening | 41 mm | 30 mm |
| Safety | ||
| CAT rating | CAT III 600 V | CAT IV 300 V / CAT III 600 V |
| Features | ||
| True RMS | Yes | No |
| Inrush | No | No |
| LoZ mode | No | No |
| Non-contact voltage | Yes | No |
| Low-pass filter | No | No |
| Temperature | Yes | No |
| Phone app | No | No |
| Build | ||
| Weight | 291 g | - |
| Warranty | 2 years | 2 years |