NCP1937B1DR2G
Discrete Semiconductor
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SOIC-20 · Generic package illustration
Based on the catalogue package field; not verified for this part. Check manufacturer documentation for dimensions, polarity and pinout.View part documentation ↓- Package
- SOIC-20
Product overview
Discrete Semiconductor
- Manufacturer
- onsemi
- Part number
- NCP1937B1DR2G
- Category
- Thyristors (SCR)
- Package
- SOIC-20
- Condition
- New & Original
- Lifecycle
- Confirm with manufacturer
- Lead time / MOQ
- Confirm with quotation
Technical parameters
44 parametersConstruction
- IPDRV(SNK)
- 800
- IQDRV(SNK)
- 800
- Copper Clad)
- 0.62
- (1 oz. Cu Printed Circuit Copper Clad)
- 121
- Human Body Model per JEDEC Standard JESD22−A114F
- 3000
- Machine Model per JEDEC Standard JESD22−A115−A
- 200
- Charge Device Model per JEDEC Standard JESD22−C101E
- 750
- VCC = 0
- 2 = 0 V
- VBO/X
- 2 = 100
- PSM Mode
- 2 = 100
- VCC(P
- 0.5 V
- Istart
- = 9 mA
- Before Startup, Fault or Latch VCC =
- 0.5 V
Performance
- High Voltage Startup Circuit Input Current 1
- 20 mA
- High Voltage Brownout Detector Input Current 3
- 20 mA
- PFC High Voltage Feedback Input Current 20
- 0.5 mA
- PFC Low Voltage Feedback Input Current 18
- 0.5 mA
- PFC Control Input Current 5 IPControl
- 10 mA
- Supply Input Current 12 ICC(MAX)
- 30 mA
- Supply Input Voltage Slew Rate 12 dVCC/dt
- 1 V/ms
- Fault Input Current 8 IFault
- 10 mA
- QR Flyback Zero Current Detection Input Current 11
- −2/+5 mA
- QR Feedback Input Voltage 7 VQCT −0
- 3 to 10 V
- QR Feedback Input Current 7
- 10 mA
- QR Flyback Current Sense Input Voltage 13 VQCS −0
- 3 to 10 V
- QR Flyback Current Sense Input Current 13
- 10 mA
- QR Flyback Feedback Input Voltage 10 VQFB −0
- 3 to 10 V
- QR Flyback Feedback Input Current 10
- 10 mA
- PSTimer Input Voltage 9 VPSTimer −0
- 3 to 10 V
- PSTimer Input Current 9 IPSTimer
- 10 mA
- PFC Driver Maximum Current 15 IPDRV(SRC)
- 500 mA
- Flyback Driver Maximum Current 14 IQDRV(SRC)
- 500 mA
- PFC ON/OFF Threshold Adjust Input Voltage 6 VPONOFF −0
- 3 to 10 V
- PFC ON/OFF Threshold Adjust Input Current 6
- 10 mA
- Maximum Junction Temperature N/A TJ(MAX)
- 150 _C
- Thermal Resistance, Junction−to−Case RθJC
- 77 C/W
- Startup Current in Inhibit Mode VCC = 0
- 2 = 0 V
- Startup Current VCC =
- 0.5 V
- Operating Mode
- 2 = 100
- Startup Circuit Off−State Leakage Current V
- 0 V
- Minimum Startup Voltage in PSM Istart
- = 9 mA
- VCC Overvoltage Protection Threshold
- 12
- VCC Overvoltage Protection Delay
- 12
- Supply Current
- 12
Specifications & documentation
Use the official manufacturer documentation to verify electrical characteristics, package dimensions and operating limits before design approval.
Frequently asked questions
Common pre-quotation questions and selection notes to help you verify key parameters and sourcing before requesting a quote.
How do I verify the part is genuine / avoid counterfeit?
Buy only from authorized or franchised channels. On receipt, check: (1) laser-etched markings that solvent will not remove; (2) batch / lot code consistent between label and device; (3) original reel or tube packaging; (4) request traceability documents (CoC, date code). For critical parts, third-party X-ray / decapsulation testing is recommended.
How do I read the markings / date code on a chip?
Most active ICs use a 4-digit date code YYWW (year + week, e.g. 2345 = 2023 week 45). The top mark is manufacturer logo + base part number + lot code. For SMD code lookup, search by "marking code + package" on AllDataSheet / Octopart / LCSC.
What does the package code mean (TO-220, SOT-23, QFP…)?
Package codes describe the physical form factor and pin layout — critical when sourcing, because electrically equivalent parts in different packages will not fit the PCB. Common: TO-220 (3-terminal power), SOT-23 (3-pin small signal), DIP / SOIC (through-hole / SMD ICs), QFP / QFN (MCUs, processors).
What if my original model is discontinued (EOL / NRND)?
Three options: (1) the manufacturer’s recommended replacement; (2) franchised distributor legacy stock; (3) a functionally compatible cross-brand part — provided pinout and key parameters match. Always evaluate on a real board before mass swap.
What is the minimum order quantity (MOQ) and lead time?
We support both sample and volume orders. Minimum order quantity, stock availability and lead time are confirmed per inquiry — tell us your model and quantity and we will quote. Sample quantities for design validation are supported.
Can I get the datasheet and samples?
The full datasheet is linked on this page. For parts without a direct datasheet, we can locate the manufacturer document on request. Sample requests are supported — contact us with your model and quantity.
Request confirmation of current stock, date code, packaging, price and delivery terms. Product information does not constitute a binding offer; final specifications are confirmed with your quotation.