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onsemi NZ8F12VSMX2WT5G
- Part No.:
- NZ8F12VSMX2WT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- 2-XDFN
- Datasheet:
-
NZ8F12VSMX2WT5G.pdf
- Description:
- DIODE ZENER 12V 250MW 2-X2DFNW
- Quantity:
- Payment:
- Shipping:
Inventory:4,950
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Product details
Overview
NZ8F12VSMX2WT5G from onsemi is a precision Zener diode voltage regulator in a 0402 wettable flank package, delivering 11.72 V to 12.28 V nominal Zener voltage at 5 mA test current, with ±2.3% tolerance, 30 Ω dynamic impedance, and 0.1 µA leakage at 9 V reverse bias - used for overvoltage clamping and reference stabilization in automotive control units and portable power rails.
For engineers reviewing the NZ8F12VSMX2WT5G datasheet, pinout, applications, or equivalent options, key selection criteria include tight voltage tolerance (±2.3%), low-profile X2DFNW2 packaging for AOI compatibility, AEC-Q101 qualification, and thermal performance under 250 mW dissipation on FR-4 board.
Technical Context
This device operates as a unidirectional Zener diode, conducting in reverse breakdown to maintain stable voltage across load circuits. Its 0.40 mm body height and wettable flank geometry support automated optical inspection and high-density PCB assembly.
Designed for operation within −65 °C to +150 °C junction temperature range, it features a maximum Zener impedance of 30 Ω at 5 mA, 9 mV/°C temperature coefficient, and 80 pF capacitance at 0 V bias and 1 MHz - enabling stable regulation in fast-switching or noise-sensitive analog supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.72 V to 12.28 V @ IZT = 5 mA - defines precise clamping threshold for 12 V rail protection |
| Zener Impedance (ZZT) | 30 Ω max @ 5 mA - ensures minimal voltage deviation under varying load current |
| Leakage Current (IR) | 0.1 µA @ VR = 9 V - guarantees negligible standby power loss in battery-powered systems |
| Power Dissipation (PD) | 250 mW @ TA = 25 °C on FR-4 (1 oz Cu, min pad) - sets thermal design limit for compact layouts |
| Capacitance (C) | 80 pF @ VR = 0 V, f = 1 MHz - limits high-frequency noise coupling in signal path protection |
| Forward Voltage (VF) | 0.9 V max @ IF = 10 mA - enables predictable forward conduction during transient polarity reversal |
| Thermal Resistance (RJA) | 415 °C/W - informs heatsinking requirements when operating near power limit |
Pinout & Package
The NZ8F12VSMX2WT5G uses the X2DFNW2 (Case 711BG) surface-mount package: 1.00 mm × 0.60 mm × 0.37 mm, 0402 inch outline, with wettable flank side walls for solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased to conduct and clamp excess voltage |
| 2 (Anode) | Reference/ground terminal | Typically tied to system ground or lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener voltage tolerance | ±2.3% (11.72–12.28 V), enabling accurate 12 V rail monitoring without external trimming |
| Wettable flank package | X2DFNW2 geometry supports automated optical inspection of solder fillets on 0402 footprint |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Pb-free, halogen-free construction | RoHS-compliant materials with no BFRs, meeting automotive and industrial environmental mandates |
| Low-profile height | 0.40 mm max - allows stacking under shields or integration into ultra-thin handheld PCBs |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | USB-C Port Overvoltage Protection |
|---|---|
Use Scenario: Monitoring 12 V battery-derived supply in engine control modules where voltage spikes exceed 14 V during load dump. IC Role / Device Role / Timing Role: Zener clamping element placed across microcontroller VCC rail to shunt transient energy before LDO input. Use Value: Tight 12 V tolerance ensures clamping occurs precisely above nominal rail, avoiding false triggering while protecting against ISO 7637-2 Pulse 5a surges. |
Use Scenario: Safeguarding USB-C port CC line and VBUS sense circuitry from accidental 20 V PD negotiation faults or adapter misconnection. IC Role / Device Role / Timing Role: Standby-mode Zener shunt connected between protected signal line and ground, activated only during overvoltage events. Use Value: 80 pF capacitance avoids signal integrity degradation on 5 Gbps USB 3.2 differential pairs while providing sub-100 ns response to >15 V transients. |
| Industrial Sensor Node Reference Stability | Medical Wearable Battery Voltage Supervision |
Use Scenario: Providing stable 12 V reference for ADC biasing and op-amp gain-setting resistors in wireless pressure sensor transmitters. IC Role / Device Role / Timing Role: Precision Zener used as secondary reference alongside bandgap, compensating for long-term drift in primary reference. Use Value: 9 mV/°C temperature coefficient minimizes reference error across −40 °C to +85 °C operating range, improving measurement repeatability. |
Use Scenario: Detecting end-of-charge condition in Li-ion–powered pulse oximeters by monitoring battery voltage decay below 12.0 V threshold. IC Role / Device Role / Timing Role: Low-leakage Zener integrated into comparator hysteresis network to define accurate undervoltage lockout point. Use Value: 0.1 µA leakage at 9 V ensures <1 nA error contribution to comparator input bias, preserving battery runtime beyond 72 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12LT1G | ±5% tolerance (11.4–12.6 V), 300 mW PD, SOT-23 package (1.3 mm × 0.9 mm) | Larger footprint; higher power but looser regulation accuracy | Select when board space permits larger package and ±5% tolerance suffices for non-critical clamping |
| MMSZ5242BT1G | ±5% tolerance (11.4–12.6 V), 500 mW PD, SOD-123 package (2.7 mm × 1.6 mm) | Higher power rating but 3× larger area and no wettable flank for AOI | Choose for legacy designs requiring higher surge handling and existing SOD-123 footprint reuse |
Compared with BZX84-C12LT1G and MMSZ5242BT1G, NZ8F12VSMX2WT5G offers tighter voltage control and AOI-compatible packaging in 0402 size - critical for next-generation automotive ECUs and miniaturized medical wearables where layout density and production yield are constrained.
Availability
NZ8F12VSMX2WT5G is available at Aetrix Electronics and suitable for automotive control units, USB-C interface protection, and industrial sensor nodes requiring stable component supply with AEC-Q101 qualification and RoHS compliance.
Supply support for NZ8F12VSMX2WT5G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NZ8F Series is part of onsemi's precision discrete portfolio, engineered specifically for high-reliability voltage regulation in space-constrained, thermally demanding environments such as automotive electronics and portable medical devices.
FAQ
What is the Zener voltage tolerance of NZ8F12VSMX2WT5G?
The NZ8F12VSMX2WT5G has a nominal Zener voltage range of 11.72 V to 12.28 V at 5 mA test current, corresponding to a ±2.3% tolerance. This tight specification is confirmed in the "Tight Tolerance Series" electrical characteristics table on page 3 of the official onsemi datasheet, distinguishing it from the standard-tolerance NZ8F12VMX2WT5G (±5%).
Is NZ8F12VSMX2WT5G qualified for automotive use?
Yes, NZ8F12VSMX2WT5G is AEC-Q101 qualified and PPAP capable. The datasheet explicitly states that devices with the "SZ" prefix (e.g., SZNZ8F12VSMX2WT5G) meet automotive requirements, and the base part NZ8F12VSMX2WT5G shares identical construction, testing, and qualification - confirmed in the "Specification Features" section and device marking notes.
What package type does NZ8F12VSMX2WT5G use?
NZ8F12VSMX2WT5G uses the X2DFNW2 package (Case 711BG), a 0402-inch surface-mount outline measuring 1.00 mm × 0.60 mm × 0.37 mm with wettable flank side walls. This is documented in the "Ordering Information" and "Mechanical Case Outline" sections of the datasheet, and verified via onsemi's official package drawing 98AON15241G.
What is the maximum power dissipation for NZ8F12VSMX2WT5G on a standard FR-4 board?
NZ8F12VSMX2WT5G has a maximum power dissipation of 250 mW at 25 °C ambient on an FR-4 board with minimum pad layout (1 oz Cu). It derates linearly at 1.5 mW/°C above 25 °C - specified in the "Maximum Ratings" table (Note 1) on page 1 of the datasheet, distinct from the 500 mW rating for larger copper areas.
Does NZ8F12VSMX2WT5G have RoHS and halogen-free compliance?
Yes, NZ8F12VSMX2WT5G is Pb-free, halogen-free/BFR-free, and RoHS compliant. This is stated in the "Specification Features" section on page 1 of the datasheet and reinforced in the "Additional Information" legal disclaimer, confirming adherence to EU Directive 2011/65/EU and related environmental standards.
NZ8F12VSMX2WT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- NZ8F
- Package/Case:
- 2-XDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±2.33%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 2-X2DFNW (1x0.6)
NZ8F12VSMX2WT5G FAQ
1.How can I place an order for NZ8F12VSMX2WT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for NZ8F12VSMX2WT5G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NZ8F12VSMX2WT5G reliable?
The price and inventory of NZ8F12VSMX2WT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZ8F12VSMX2WT5G is usually 5 days.
3.What payment methods are accepted for NZ8F12VSMX2WT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZ8F12VSMX2WT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NZ8F12VSMX2WT5G?
NZ8F12VSMX2WT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NZ8F12VSMX2WT5G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NZ8F12VSMX2WT5G?
For technical support, including NZ8F12VSMX2WT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZ8F12VSMX2WT5G requirements.
6.How does Aetrix verify that NZ8F12VSMX2WT5G is sourced from the original manufacturer or authorized distributors?
All NZ8F12VSMX2WT5G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NZ8F12VSMX2WT5G meets industry standards.
7.What is the process for return or replacement of NZ8F12VSMX2WT5G?
All NZ8F12VSMX2WT5G units undergo pre-shipment inspection (PSI). If there is an issue with NZ8F12VSMX2WT5G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NZ8F12VSMX2WT5G part is unused and in its original packaging.
Return procedure for NZ8F12VSMX2WT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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