VOLTCRAFT VC-337 Digital Clamp Meter CAT III 300 V, CAT II 600 V, 4000 Counts

The VC-337 stands out among entry-level clamp meters by offering true CAT III 300 V / CAT II 600 V safety in a slim, one-hand operable body. While many budget clamps force you to choose between current range and voltage accuracy, this model covers both with a 4000-count display and a 30 mm jaw that swallows standard building cables without contorting your wrist.

Highlights

• 4000-count LCD with clear digits and low-battery warning
• AC current up to 400 A via clamp — no circuit interruption needed
• AC/DC voltage to 600 V, resistance to 40 MΩ, capacitance to 100 µF
• K-type temperature input from -20 °C to +760 °C (probe included)
• Continuity beeper and diode test for fast go/no-go checks
• Data hold freezes readings in tight or dark spots
• Auto-ranging plus manual override for predictable measurements
• Powered by 2x AAA batteries, with auto power-off to extend life

In daily use

The VC-337 is built for electricians, HVAC technicians, and advanced DIYers who need a dependable clamp meter without paying for logging or Bluetooth extras. The average-sensing circuit is stable on sinusoidal loads, and the 30 mm jaw opening handles up to 300 MCM conductors. A tactile rotary switch lets you change functions with gloves on, while the backlit display (activated by a dedicated button) helps in distribution boards and crawl spaces. The included carrying case keeps the meter, test leads, and temperature probe together, so the whole kit fits in a tool bag side pocket.

Full specifications

• Display: LCD, 4000 counts
• Measurement category: CAT III 300 V, CAT II 600 V
• AC current: 0.1 A – 400 A
• DC voltage: 0.1 mV – 600 V
• AC voltage: 0.1 mV – 600 V
• Resistance: 0.1 Ω – 40 MΩ
• Capacitance: 1 nF – 100 µF
• Frequency: 10 Hz – 10 kHz
• Temperature (K-type): -20 °C to +760 °C
• Jaw opening: 30 mm
• Measurement method: average sensing
• Continuity: yes, with acoustic signal
• Diode test: yes
• Data hold: yes
• Auto-ranging: yes
• Power supply: 2x AAA batteries
• Safety standard: EN 61010-1, EN 61010-2-032, EN 61010-2-033
• Included accessories: test leads, K-type temperature probe, batteries, carrying case

Final note

For a clamp meter that meets professional safety norms yet stays affordable, the VC-337 delivers the essential functions without compromise. Its combination of CAT III 300 V rating, wide jaw, and temperature input makes it a practical everyday tool for anyone working on residential or light commercial electrical systems.