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
400 ANoCAT III 600 V
3.0/5
A basic AC clamp for occasional current checks on plain resistive and motor loads, at an entry price.
- 400 AAC current
- NoDC current
- CAT IV 300 V / CAT III 600 VSafety
- 30 mmJaw
Check price at Amazon$88
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Low price for a Fluke-made clamp with a two-year warranty
- Tight 1.8% current accuracy on ordinary sine-wave loads
Cons
- Not true RMS, so readings drift on LED drivers, variable-speed motors and electronics
- AC current only and no extra features such as non-contact voltage
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.
Specifications
| Model number | FLUKE-302+ |
|---|---|
| Measurement | |
| AC current (jaw) | 400 A |
| DC current (jaw) | No |
| Voltage | 600 V |
| Current accuracy | 1.8% of reading |
| Jaw opening | 30 mm |
| Safety | |
| CAT rating | CAT IV 300 V / CAT III 600 V |
| Features | |
| True RMS | No |
| Inrush | No |
| LoZ mode | No |
| Non-contact voltage | No |
| Low-pass filter | No |
| Temperature | No |
| Phone app | No |
| Build | |
| Warranty | 2 years |
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Fluke 323
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Klein Tools CL120
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