Extech EX655
#2 in AC/DCFull review
A well-equipped AC/DC clamp with a three-year warranty, for HVAC and maintenance technicians.
Amazon $173.50$173.50
The Extech EX655 is the better clamp meter overall, rated 3.7 to 3.2. The Extech EX655 leads on features, safety rating and warranty. The Fluke 301D wins on accuracy, price and jaw opening. The Fluke 301D costs $45.51 less ($127.99 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.
Fluke 301D
#10 in AC/DCFull review
A slim, light AC/DC clamp for residential and light commercial work where tight panels matter more than a high safety rating.
Amazon $127.99$127.99
Which should you buy?
- Choose the Extech EX655 for features (true RMS, inrush, non-contact voltage, temperature vs none of the listed features), safety rating (CAT III 600 V / CAT II 1,000 V vs CAT III 300 V) and warranty (3-year warranty vs 2-year warranty).
- Choose the Fluke 301D for accuracy (2% of reading vs 2.5% of reading), price ($127.99 vs $173.50) and jaw opening (34 mm jaw vs 30 mm jaw).
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 weight | Extech EX655 | Fluke 301D |
|---|---|---|
| Overall rating | 3.7/5 | 3.2/5 |
| Current range 15% | 60 600 A through the jaw | 60 600 A through the jaw |
| DC current 15% | 100 DC current to 600 A through the jaw | 100 DC current to 600 A through the jaw |
| Safety rating 20% | 55 CAT III 600 V / CAT II 1,000 V | 25 CAT III 300 V |
| Features 15% | 60 true RMS, inrush, non-contact voltage, temperature | 0 none of the listed features |
| Accuracy 10% | 33 2.5% of reading | 67 2% of reading |
| Jaw opening 5% | 33 30 mm jaw | 47 34 mm jaw |
| Warranty 10% | 100 3-year warranty | 50 2-year warranty |
| Price 10% | 46 $173.50 | 59 $127.99 |
Specifications
| Extech EX655 | Fluke 301D | |
|---|---|---|
| Measurement | ||
| AC current (jaw) | 600 A | 600 A |
| DC current (jaw) | 600 A | 600 A |
| Voltage | 1,000 V | 600 V |
| Current accuracy | 2.5% of reading | 2% of reading |
| Jaw opening | 30 mm | 34 mm |
| Safety | ||
| CAT rating | CAT III 600 V / CAT II 1,000 V | CAT III 300 V |
| Features | ||
| True RMS | Yes | No |
| Inrush | Yes | No |
| LoZ mode | No | No |
| Non-contact voltage | Yes | No |
| Low-pass filter | No | No |
| Temperature | Yes | No |
| Phone app | No | No |
| Build | ||
| Weight | 265 g | 154 g |
| Warranty | 3 years | 2 years |