Extech EX655 vs Extech MA440

Last updated: November 9, 2026

The Extech EX655 rates 3.7 among AC/DC clamp meters; the Extech MA440 rates 3.1 among AC only ones. The Extech MA440 costs $106.51 less ($66.99 vs $173.50).

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.

Extech EX655 vs Extech MA440

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 weightExtech EX655Extech MA440
Overall rating3.7/53.1/5
Current range 15%60 600 A through the jaw46 400 A through the jaw
DC current 15%100 DC current to 600 A through the jaw0 no DC current
Safety rating 20%55 CAT III 600 V / CAT II 1,000 V55 CAT III 600 V
Features 15%60 true RMS, inrush, non-contact voltage, temperature35 true RMS, non-contact voltage
Accuracy 10%33 2.5% of reading67 2% of reading
Jaw opening 5%33 30 mm jaw33 30 mm jaw
Warranty 10%100 3-year warranty50 2-year warranty
Price 10%46 $173.5087 $66.99

Specifications

Extech EX655Extech MA440
Measurement
AC current (jaw)600 A400 A
DC current (jaw)600 ANo
Voltage1,000 V-
Current accuracy2.5% of reading2% of reading
Jaw opening30 mm30 mm
Safety
CAT ratingCAT III 600 V / CAT II 1,000 VCAT III 600 V
Features
True RMSYesYes
InrushYesNo
LoZ modeNoNo
Non-contact voltageYesYes
Low-pass filterNoNo
TemperatureYesNo
Phone appNoNo
Build
Weight265 g265 g
Warranty3 years2 years

All clamp meter comparisons →