Extech MA440

Last updated: November 9, 2026

Extech MA440

3.1/5#4 of 8 in AC only clamp meters
3.1

A plain true-RMS AC clamp for electricians and technicians who only need current, voltage and resistance.

400 AAC current
NoDC current
CAT III 600 VSafety
30 mmJaw

Check price at Amazon$66.99

Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros

True RMS with non-contact voltage at a low price
Two-year warranty

Cons

AC current only
No temperature, inrush or DC microamps

How it scores

The rating comes from 8 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.

Current range 400 A through the jaw46
DC current no DC current0
Safety rating CAT III 600 V55
Features true RMS, non-contact voltage35
Accuracy 2% of reading67
Jaw opening 30 mm jaw33
Warranty 2-year warranty50
Price $66.9987

Specifications

Measurement
Model number	MA440
AC current (jaw)	400 A
DC current (jaw)	No
Current accuracy	2% of reading
Jaw opening	30 mm
Safety
CAT rating	CAT III 600 V
Features
True RMS	Yes
Inrush	No
LoZ mode	No
Non-contact voltage	Yes
Low-pass filter	No
Temperature	No
Phone app	No
Build
Weight	265 g
Warranty	2 years

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