Klein Tools CL390 vs Klein Tools CL490

Last updated: November 9, 2026

The Klein Tools CL390 and the Klein Tools CL490 are evenly matched, rated 3.7 and 3.7. The Klein Tools CL390 costs $15.39 less ($86.27 vs $101.66).

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.

Klein Tools CL390 vs Klein Tools CL490

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every AC/DC clamp meter; a clear win is highlighted. How we rank explains each one.

Factor weightKlein Tools CL390Klein Tools CL490
Overall rating3.7/53.7/5
Current range 15%46 400 A through the jaw46 400 A through the jaw
DC current 15%100 DC current to 400 A through the jaw100 DC current to 400 A through the jaw
Safety rating 20%55 CAT III 600 V55 CAT III 600 V
Features 15%50 true RMS, non-contact voltage, temperature, DC microamps50 true RMS, non-contact voltage, temperature, DC microamps
Accuracy 10%67 2% of reading67 2% of reading
Jaw opening 5%70 41 mm jaw70 41 mm jaw
Warranty 10%50 2-year warranty50 2-year warranty
Price 10%76 $86.2769 $101.66

Specifications

Klein Tools CL390Klein Tools CL490
Measurement
AC current (jaw)400 A400 A
DC current (jaw)400 A400 A
DC microamps (leads)200 uA200 uA
Voltage600 V600 V
Current accuracy2% of reading2% of reading
Jaw opening41 mm41 mm
Safety
CAT ratingCAT III 600 VCAT III 600 V
Features
True RMSYesYes
InrushNoNo
LoZ modeNoNo
Non-contact voltageYesYes
Low-pass filterNoNo
TemperatureYesYes
Phone appNoNo
Build
Weight291 g346 g
Warranty2 years2 years

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