Extech MA440
#4 in AC onlyFull review
A plain true-RMS AC clamp for electricians and technicians who only need current, voltage and resistance.
Amazon $66.99$66.99
The Extech MA440 and the Fluke 302+ are evenly matched, rated 3.1 and 3.0. The Extech MA440 leads on features and price. The Fluke 302+ wins on safety rating and accuracy. The Extech MA440 costs $21.01 less ($66.99 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
Which should you buy?
- Choose the Extech MA440 for features (true RMS, non-contact voltage vs none of the listed features) and price ($66.99 vs $88).
- Choose the Fluke 302+ for safety rating (CAT IV 300 V / CAT III 600 V vs CAT III 600 V) and accuracy (1.8% of reading vs 2% of reading).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every AC only clamp meter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Extech MA440 | Fluke 302+ |
|---|---|---|
| Overall rating | 3.1/5 | 3.0/5 |
| Current range 15% | 46 400 A through the jaw | 46 400 A through the jaw |
| DC current 15% | 0 no DC current | 0 no DC current |
| Safety rating 20% | 55 CAT III 600 V | 75 CAT IV 300 V / CAT III 600 V |
| Features 15% | 35 true RMS, non-contact voltage | 0 none of the listed features |
| Accuracy 10% | 67 2% of reading | 80 1.8% of reading |
| Jaw opening 5% | 33 30 mm jaw | 33 30 mm jaw |
| Warranty 10% | 50 2-year warranty | 50 2-year warranty |
| Price 10% | 87 $66.99 | 75 $88 |
Specifications
| Extech MA440 | Fluke 302+ | |
|---|---|---|
| Measurement | ||
| AC current (jaw) | 400 A | 400 A |
| DC current (jaw) | No | No |
| Voltage | - | 600 V |
| Current accuracy | 2% of reading | 1.8% of reading |
| Jaw opening | 30 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 | No | No |
| Phone app | No | No |
| Build | ||
| Weight | 265 g | - |
| Warranty | 2 years | 2 years |