NCS37021MNTWG
onsemiNCS37021MNTWG is an onsemi self-test ground-fault circuit interrupter (GFCI) controller in a QFN-16 package — for UL943-compliant ground-fault protection in receptacles, EV charging equipment, appliances and industrial outlets. The controller operates from 4.0 V to 12 V (applied through a series impedance on 120 V to 480 V AC systems), draws 1.3 mA typical quiescent current and works over -40 °C to +95 °C, with the self-test function supporting the periodic auto-monitoring that current UL943 editions require. Selection advice: the MNTWG code is the 3 x 3 mm QFN-16 tape-and-reel order form — match it exactly, because the sense transformer, solenoid driver parts and threshold network around the IC must be designed to the datasheet reference circuit for the end product to pass GFCI certification testing. This is a controller, not a complete protected outlet: budget the external current transformer, SCR and passives, and validate trip thresholds and timing on prototypes. Parameters verified against onsemi documentation.
- MPN
- NCS37021MNTWG
- Manufacturer
- onsemi
- Family
- GFCI controller
- Package
- QFN-16
- Manufacturer channel coverage
- Checked by RFQ
- Data last checked
- Commercial check required
- Required order checks
- Suffix, package, date code, lot, source and traceability
Four checks before a commercial offer.
Identity
Exact MPN, manufacturer and suffix
Supply
Supplier type, quantity and freshness
Evidence
Lot, labels, photos and documents
Terms
Price, lead time, payment and shipping
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NCS37021MNTWG FAQ
What should I check before substituting NCS37021MNTWG with another GFCI controller?
Match the full ordering code, not the series name: package (QFN-16), temperature grade and packing all ride on the suffixes. A same-series code in a different package is a different orderable device, so confirm the substitute against the onsemi datasheet before changing the BOM.