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onsemi SZNZ8F33VSMX2WT5G
- Part No.:
- SZNZ8F33VSMX2WT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- 2-XDFN
- Datasheet:
-
SZNZ8F33VSMX2WT5G.pdf
- Description:
- DIODE ZENER 33V 250MW 2-X2DFNW
- Quantity:
- Payment:
- Shipping:
Inventory:4,450
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Product details
Overview
SZNZ8F33VSMX2WT5G from onsemi is an AEC-Q101-qualified Zener diode designed for precision voltage regulation and transient overvoltage protection in space-constrained automotive and industrial circuits. It delivers a nominal Zener voltage of 33 V with ±2.3% tolerance (32.24 V to 33.76 V at IZT = 5 mA), 95 Ω dynamic impedance, 0.1 µA leakage at 26 V reverse bias, and operates across −65 °C to +150 °C junction temperature - deployed in engine control units and ADAS sensor power rails.
For engineers reviewing the SZNZ8F33VSMX2WT5G datasheet, pinout, applications, or equivalent options, key selection criteria include its wettable flank X2DFNW2 package for AOI compatibility, 250 mW power dissipation on FR-4 (1 oz Cu, minimum pad), tight-tolerance regulation, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device belongs to the NZ8F Series tight-tolerance Zener family, optimized for low-profile, high-reliability voltage reference and clamping in automotive electronics. Its X2DFNW2 package features wettable flanks enabling automated optical inspection, and it supports stable regulation under thermal stress up to +150 °C junction temperature.
The SZNZ8F33VSMX2WT5G exhibits a temperature coefficient of approximately +14 mV/°C near 33 V, consistent with mid-voltage Zeners in this series, and maintains ≤45 pF capacitance at 0 V bias and 1 MHz - critical for ESD-sensitive signal line protection without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 32.24 V to 33.76 V @ IZT = 5 mA - ensures precise clamping within ±2.3% for 33 V rail stabilization |
| Power Dissipation (PD) | 250 mW on FR-4 (1 oz Cu, minimum pad) - defines maximum continuous power handling in compact PCB layouts |
| Zener Impedance (ZZT) | 95 Ω @ IZT = 5 mA - indicates regulation stiffness; lower than standard-tolerance variants for improved line/load regulation |
| Reverse Leakage (IR) | 0.1 µA @ VR = 26 V - enables low-quiescent-current operation in always-on automotive modules |
| Capacitance (C) | 45 pF @ VR = 0 V, f = 1 MHz - minimizes high-frequency loading on data lines and sensor interfaces |
| Junction Temp Range | −65 °C to +150 °C - supports under-hood and transmission-control applications without derating penalties |
| AEC-Q101 Qualified | Yes - validated for automotive use including temperature cycling, HTRB, and ESD robustness per AEC standard |
Pinout & Package
Package: X2DFNW2 (Case 711BG), 0402-inch footprint (1.00 mm × 0.60 mm × 0.37 mm), wettable flank, Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased during clamping; marked side on top surface |
| 2 (Anode) | Reference/ground terminal | Typically tied to system ground or low-side reference; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±2.3% (32.24–33.76 V) enables accurate 33 V rail monitoring without external trimming |
| Wettable flank package | X2DFNW2 geometry supports 100% AOI coverage for zero-defect automotive manufacturing |
| AEC-Q101 qualification | Validated for automotive environments including thermal shock, humidity, and mechanical stress testing |
| Low profile height | 0.40 mm max body height allows placement beneath connectors or in ultra-thin modules |
| Pb-free & RoHS compliant | Meets global environmental regulations and reflow compatibility with lead-free solder profiles |
Applications
| Engine Control Unit (ECU) Power Monitoring | ADAS Camera Sensor Biasing |
|---|---|
Use Scenario: Monitoring 33 V auxiliary supply in gasoline/diesel ECUs to detect overvoltage faults before microcontroller damage. IC Role / Device Role / Timing Role: Precision shunt regulator and overvoltage clamp protecting 33 V analog sensor interface circuitry. Use Value: Tight ±2.3% tolerance ensures fault detection at exactly 33.8 V, avoiding false triggers while preserving headroom for transients. |
Use Scenario: Providing stable bias voltage to CMOS image sensor analog front-end in 24/33 V automotive camera modules. IC Role / Device Role / Timing Role: Low-capacitance (45 pF) Zener reference stabilizing LDO input or ADC reference buffer supply. Use Value: 45 pF capacitance prevents high-frequency noise coupling into pixel clock paths, maintaining SNR > 60 dB. |
| Transmission Control Module (TCM) CAN Bus Protection | Electric Power Steering (EPS) Motor Driver Feedback |
Use Scenario: Clamping induced transients on 33 V CAN FD power rail during load dump events in 12 V/48 V hybrid architectures. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing short-duration energy spikes (<100 µs) without latch-up. Use Value: 250 mW rating combined with 95 Ω ZZT limits clamping voltage overshoot to <35.2 V during ISO 7637-2 Pulse 5a. |
Use Scenario: Regulating feedback voltage for isolated current sense amplifiers monitoring 33 V motor phase currents in EPS inverters. IC Role / Device Role / Timing Role: Stable voltage reference for op-amp biasing in galvanically isolated current sensing circuits. Use Value: −65 °C to +150 °C operating range ensures functionality during cold cranking and sustained high-temp motor operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1SMB5933BT3G | 33 V, ±5% tolerance, DO-214AA package (3.5 mm × 2.7 mm), 3 W PD, 30 Ω ZZT | Larger footprint, higher power, lower impedance - suited for non-AEC, board-level surge suppression | Select when higher surge energy absorption (>100 W) is required and space permits larger package |
| MMSZ5265B-TP | 33 V, ±5% tolerance, SOD-123 package (2.7 mm × 1.4 mm), 500 mW PD, 100 Ω ZZT | No AEC-Q101 qualification, no wettable flanks, higher leakage (1 µA @ 26 V) | Select for cost-sensitive industrial applications where AOI and automotive qualification are not mandatory |
Compared with SZNZ8F33VSMX2WT5G, the 1SMB5933BT3G offers superior surge handling but lacks AOI support and automotive qualification, while the MMSZ5265B-TP provides similar voltage but trades AEC-Q101 compliance and wettable flanks for lower cost and wider availability.
Availability
SZNZ8F33VSMX2WT5G is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and electric power steering systems requiring stable component supply with full traceability and automotive-grade lifecycle assurance.
Supply support for SZNZ8F33VSMX2WT5G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NZ8F Series was developed specifically for high-reliability, miniaturized voltage regulation in automotive electronics - emphasizing AEC-Q101 compliance, wettable flank manufacturability, and tight parametric control across temperature.
FAQ
What is the Zener voltage tolerance of the SZNZ8F33VSMX2WT5G?
The SZNZ8F33VSMX2WT5G has a tight tolerance of ±2.3%, specifying a Zener voltage range of 32.24 V to 33.76 V at test current IZT = 5 mA. This tighter spec distinguishes it from the standard-tolerance NZ8F33VMX2WT5G (±5%) and supports precision regulation in automotive power monitoring circuits where narrow voltage windows are critical.
Is the SZNZ8F33VSMX2WT5G qualified for automotive applications?
Yes, the SZNZ8F33VSMX2WT5G is AEC-Q101 qualified and PPAP capable. The "SZ" prefix explicitly denotes compliance with automotive-specific site and process controls, and the device undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD validation per AEC-Q101 Rev D requirements.
What package type does the SZNZ8F33VSMX2WT5G use, and why is it significant?
The SZNZ8F33VSMX2WT5G uses the X2DFNW2 (Case 711BG) package - a 0402-inch, 0.40 mm low-profile, wettable flank design. This enables full automated optical inspection (AOI) coverage for zero-defect automotive manufacturing and fits into ultra-dense layouts such as ADAS camera modules where board space is constrained.
What is the maximum power dissipation of the SZNZ8F33VSMX2WT5G on a standard PCB?
The SZNZ8F33VSMX2WT5G is rated for 250 mW total device dissipation on an FR-4 board with minimum pad layout and 1 oz copper. Derating is 1.5 mW/°C above 25 °C ambient. This value reflects real-world thermal performance in compact automotive PCBs - not theoretical die limits - and must be applied in thermal design calculations.
How does the SZNZ8F33VSMX2WT5G compare to the standard-tolerance NZ8F33VMX2WT5G?
The SZNZ8F33VSMX2WT5G differs from NZ8F33VMX2WT5G primarily in tighter voltage tolerance (±2.3% vs. ±5%), identical package and pinout, and shared AEC-Q101 qualification. Both share 95 Ω ZZT, 45 pF capacitance, and −65 °C to +150 °C operation. The SZNZ8F33VSMX2WT5G is selected when regulation accuracy directly impacts functional safety thresholds.
SZNZ8F33VSMX2WT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- NZ8F
- Package/Case:
- 2-XDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±2.3%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 26 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)
SZNZ8F33VSMX2WT5G FAQ
1.How can I place an order for SZNZ8F33VSMX2WT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNZ8F33VSMX2WT5G 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 SZNZ8F33VSMX2WT5G reliable?
The price and inventory of SZNZ8F33VSMX2WT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNZ8F33VSMX2WT5G is usually 5 days.
3.What payment methods are accepted for SZNZ8F33VSMX2WT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNZ8F33VSMX2WT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNZ8F33VSMX2WT5G?
SZNZ8F33VSMX2WT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNZ8F33VSMX2WT5G 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 SZNZ8F33VSMX2WT5G?
For technical support, including SZNZ8F33VSMX2WT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNZ8F33VSMX2WT5G requirements.
6.How does Aetrix verify that SZNZ8F33VSMX2WT5G is sourced from the original manufacturer or authorized distributors?
All SZNZ8F33VSMX2WT5G 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 SZNZ8F33VSMX2WT5G meets industry standards.
7.What is the process for return or replacement of SZNZ8F33VSMX2WT5G?
All SZNZ8F33VSMX2WT5G units undergo pre-shipment inspection (PSI). If there is an issue with SZNZ8F33VSMX2WT5G, 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 SZNZ8F33VSMX2WT5G part is unused and in its original packaging.
Return procedure for SZNZ8F33VSMX2WT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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