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onsemi SZNZ8F47VSMX2WT5G
- Part No.:
- SZNZ8F47VSMX2WT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- 2-XDFN
- Datasheet:
-
SZNZ8F47VSMX2WT5G.pdf
- Description:
- DIODE ZENER 47V 250MW 2-X2DFNW
- Quantity:
- Payment:
- Shipping:
Inventory:2,281
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Product details
Overview
SZNZ8F47VSMX2WT5G from onsemi is an AEC-Q101 qualified automotive-grade Zener diode in X2DFNW2 (0402) wettable flank package, with nominal Zener voltage 47 V (45.92–48.08 V at IZT = 2 mA), dynamic impedance ≤170 Ω, and leakage current ≤0.1 µA at 38 V. It provides precision voltage regulation and transient overvoltage clamping in space-constrained automotive control units.
For engineers reviewing the SZNZ8F47VSMX2WT5G datasheet, pinout, applications, or equivalent options, key selection criteria include tight ±2.3% voltage tolerance (VZ = 45.92–48.08 V), low 0.40 mm body height, AOI-optimized wettable flanks, and AEC-Q101 qualification for under-hood electronics.
Technical Context
This device operates as a unidirectional voltage reference and clamp, conducting in reverse bias above its specified Zener breakdown threshold. Its thermal resistance (RJA) is 247 °C/W on 150 mm² FR-4 board, enabling stable regulation up to +150 °C junction temperature.
The SZNZ8F47VSMX2WT5G belongs to the NZ8F "tight tolerance" series (denoted by 'S' in part number), offering tighter VZ tolerance than standard MX2W variants. It exhibits a positive temperature coefficient (~+0.075 mV/°C typical per Figure 3/4 at 47 V) and capacitance of 40 pF at 0 V bias, 1 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 45.92–48.08 V @ IZT = 2 mA - enables precise 47 V rail clamping with ±2.3% tolerance |
| Zener Impedance (ZZT) | ≤170 Ω @ IZT = 2 mA - ensures minimal voltage shift under load variation |
| Leakage Current (IR) | ≤0.1 µA @ VR = 38 V - guarantees low standby power loss in always-on circuits |
| Capacitance (C) | 40 pF @ VR = 0 V, f = 1 MHz - supports high-frequency ESD/transient suppression without signal distortion |
| Power Dissipation (PD) | 500 mW @ TA = 25 °C on 150 mm² FR-4 - allows robust transient energy absorption in compact layouts |
| Package | X2DFNW2 (0402, 1.00 × 0.60 × 0.37 mm) - enables automated optical inspection and ultra-dense PCB placement |
| AEC-Q101 Qualified | Yes - certified for automotive under-hood applications including engine control modules and ADAS sensors |
Pinout & Package
X2DFNW2 surface-mount package with wettable flank geometry (Case 711BG), 0.65 mm pitch, 1.00 mm × 0.60 mm footprint, and 0.37 mm max height. Designed for reflow soldering and AOI compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener cathode terminal | Connected to regulated voltage rail; reverse-biased operation requires this node at higher potential than anode |
| 2 (Anode) | Zener anode terminal | Connected to ground or lower-potential reference; completes conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener voltage tolerance | ±2.3% (45.92–48.08 V) - reduces calibration overhead in safety-critical automotive voltage monitoring |
| Wettable flank leads | Full-side metallization on cathode/anode - enables reliable solder joint inspection via AOI without X-ray |
| AEC-Q101 qualification | Validated for automotive temperature cycling, humidity, and mechanical shock - supports PPAP compliance for Tier 1 suppliers |
| Pb-Free, Halogen-Free | RoHS-compliant materials with no BFRs - meets global environmental regulations for vehicle electronics |
| Low-profile packaging | 0.37 mm max height - preserves vertical clearance in multi-layer modules such as battery management systems |
Applications
| Engine Control Unit (ECU) Power Monitoring | ADAS Camera Module Voltage Clamp |
|---|---|
Use Scenario: Monitoring 48 V supply rail in gasoline/diesel engine ECUs for overvoltage detection prior to microcontroller reset. IC Role / Device Role / Timing Role: Precision Zener reference and fast-acting shunt clamp protecting 3.3 V LDO input stage from transients. Use Value: Tight 47 V tolerance ensures clamping occurs before downstream regulator damage, while 40 pF capacitance avoids signal integrity issues on high-speed CAN FD lines. | Use Scenario: Protecting image sensor analog front-end inputs in 77 GHz radar camera fusion modules exposed to load dump pulses. IC Role / Device Role / Timing Role: Standby-mode overvoltage suppressor placed directly at sensor supply pin to absorb ISO 7637-2 Pulse 5a energy. Use Value: 500 mW dissipation rating and AEC-Q101 qualification allow sustained operation at 125 °C ambient, critical for under-hood camera housings. |
| Electric Power Steering (EPS) Motor Driver Protection | Automotive Infotainment Display Backlight Regulation |
Use Scenario: Clamping gate driver supply rails in 48 V EPS inverters during MOSFET switching-induced voltage spikes. IC Role / Device Role / Timing Role: Fast-response Zener clamp parallel to bootstrap capacitor, limiting voltage overshoot to safe levels for high-side driver ICs. Use Value: Low 170 Ω Zener impedance minimizes voltage excursion during 100 ns transients, preventing false triggering of desaturation protection. | Use Scenario: Providing stable 47 V bias for LED string drivers in digital instrument cluster backlights operating across −40 °C to +105 °C. IC Role / Device Role / Timing Role: Temperature-stable voltage reference for current-sense amplifier feedback network in constant-current LED driver. Use Value: Positive TC (~+0.075 mV/°C) compensates for LED forward voltage drift, maintaining consistent brightness over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1SMA4739HE3_A/H | VZ = 47 V ±5%, 1 W power rating, DO-214AC package (3.5 mm × 1.6 mm) | Larger footprint and higher thermal mass; suited for non-AEC-Q101 industrial power supplies | Select when higher surge power handling is required and board space permits larger package |
| MMSZ47ET1G | VZ = 47 V ±5%, SOD-123 package (2.7 mm × 1.4 mm), no AEC-Q101 qualification | Lower cost, non-automotive grade; lacks wettable flanks and AOI support | Select for cost-sensitive consumer portables where AEC-Q101 and AOI are not mandated |
Compared with SZNZ8F47VSMX2WT5G, the 1SMA4739HE3_A/H offers higher surge capability but requires 5× more PCB area and lacks automotive qualification; MMSZ47ET1G provides similar voltage rating at lower cost but omits wettable flanks, AOI compatibility, and AEC-Q101 validation needed for automotive production.
Availability
SZNZ8F47VSMX2WT5G is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, and electric power steering systems requiring stable component supply with full traceability and lifecycle management.
Supply support for SZNZ8F47VSMX2WT5G 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 designed specifically for high-reliability automotive voltage regulation and transient suppression, emphasizing AEC-Q101 qualification, wettable flank manufacturability, and tight-tolerance Zener performance in 0402 form factor.
FAQ
What is the Zener voltage tolerance of SZNZ8F47VSMX2WT5G?
The SZNZ8F47VSMX2WT5G has a nominal Zener voltage of 47 V with a tight tolerance of ±2.3%, specified as 45.92 V to 48.08 V at test current IZT = 2 mA. This tight tolerance is achieved through the 'S' (tight tolerance) variant designation in the NZ8F family and is validated per AEC-Q101 stress testing protocols.
Is SZNZ8F47VSMX2WT5G qualified for automotive use?
Yes, SZNZ8F47VSMX2WT5G is AEC-Q101 qualified and PPAP capable. The 'SZ' prefix explicitly denotes automotive-grade manufacturing controls, unique site requirements, and qualification for under-hood applications including engine control, ADAS, and EPS systems operating from −40 °C to +150 °C junction temperature.
What package type does SZNZ8F47VSMX2WT5G use and why is it significant?
SZNZ8F47VSMX2WT5G uses the X2DFNW2 (Case 711BG) wettable flank 0402 package. Its significance lies in full-side metallization enabling reliable automated optical inspection (AOI) of solder joints - critical for zero-defect automotive manufacturing - and ultra-low 0.37 mm profile for dense PCB layouts in space-constrained modules like radar sensors.
How does the thermal performance of SZNZ8F47VSMX2WT5G compare between different PCB layouts?
SZNZ8F47VSMX2WT5G delivers 500 mW power dissipation on a 150 mm² FR-4 board (RJA = 247 °C/W), but only 250 mW on minimum-pad layout (RJA = 415 °C/W). This 2× derating highlights the need for adequate copper pour in automotive applications where sustained 125 °C ambient temperatures demand optimized thermal design.
What is the maximum reverse leakage current specification for SZNZ8F47VSMX2WT5G?
The maximum reverse leakage current for SZNZ8F47VSMX2WT5G is 0.1 µA at VR = 38 V (80% of nominal Zener voltage), as specified in the Electrical Characteristics table on page 3 of the datasheet. This low leakage ensures minimal quiescent power draw in always-on automotive subsystems such as telematics wake-up circuits.
SZNZ8F47VSMX2WT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- NZ8F
- Package/Case:
- 2-XDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±2.3%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 38 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 2-X2DFNW (1x0.6)
SZNZ8F47VSMX2WT5G FAQ
1.How can I place an order for SZNZ8F47VSMX2WT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNZ8F47VSMX2WT5G 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 SZNZ8F47VSMX2WT5G reliable?
The price and inventory of SZNZ8F47VSMX2WT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNZ8F47VSMX2WT5G is usually 5 days.
3.What payment methods are accepted for SZNZ8F47VSMX2WT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNZ8F47VSMX2WT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNZ8F47VSMX2WT5G?
SZNZ8F47VSMX2WT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNZ8F47VSMX2WT5G 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 SZNZ8F47VSMX2WT5G?
For technical support, including SZNZ8F47VSMX2WT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNZ8F47VSMX2WT5G requirements.
6.How does Aetrix verify that SZNZ8F47VSMX2WT5G is sourced from the original manufacturer or authorized distributors?
All SZNZ8F47VSMX2WT5G 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 SZNZ8F47VSMX2WT5G meets industry standards.
7.What is the process for return or replacement of SZNZ8F47VSMX2WT5G?
All SZNZ8F47VSMX2WT5G units undergo pre-shipment inspection (PSI). If there is an issue with SZNZ8F47VSMX2WT5G, 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 SZNZ8F47VSMX2WT5G part is unused and in its original packaging.
Return procedure for SZNZ8F47VSMX2WT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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