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Nexperia USA Inc. SZMM3Z68VT1GX
- Part No.:
- SZMM3Z68VT1GX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z68VT1GX.pdf
- Description:
- DIODE ZENER 68V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:26,500
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Product details
Overview
SZMM3Z68VT1GX from Nexperia is a 68 V ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, with 47.6 Ω typical differential resistance at IZ = 2 mA and AEC-Q101 qualification for automotive use.
For engineers reviewing the SZMM3Z68VT1GX datasheet, SZMM3Z68VT1GX pinout, SZMM3Z68VT1GX application, or SZMM3Z68VT1GX equivalent, this part serves as a precision shunt reference in low-power voltage regulation, overvoltage protection, and biasing circuits where compact size, thermal stability, and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 64–72 V nominal working voltage across its terminals under regulated current conditions. Its temperature coefficient of +65.6 to +79.8 mV/K at IZ = 2 mA enables predictable drift compensation in temperature-sensitive references.
The device exhibits low reverse leakage (<475 µA at VR = 62 V), 35 pF capacitance at 1 MHz/0 V, and junction-to-solder-point thermal resistance of 110 K/W - enabling reliable operation on standard FR4 PCBs with minimal heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 64.0–72.0 V at IZ = 2 mA - defines precise regulation threshold for overvoltage clamping and reference generation |
| Differential Resistance (rdiff) | ≤ 0.05 Ω typical at IZ = 2 mA - ensures minimal voltage deviation under load current variation |
| Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 µs square wave - supports transient surge suppression without failure |
| Reverse Current (IR) | ≤ 475 µA at VR = 62 V - guarantees low standby leakage in high-impedance bias networks |
| Capacitance (Cd) | 35 pF at f = 1 MHz, VR = 0 V - limits high-frequency noise coupling in signal-path references |
| AEC-Q101 Qualified | Validated for automotive-grade reliability - enables use in engine control, body electronics, and ADAS subsystems |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic case with 2 leads, 2.7 × 1.6 mm footprint, 0.45 mm height, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | 0.05 Ω typical at IZ = 2 mA - improves regulation accuracy under dynamic load changes |
| AEC-Q101 qualification | Stress-tested per automotive discrete semiconductor standard - ensures long-term reliability in harsh environments |
| Small SOD323 package | 2.7 × 1.6 mm footprint - enables high-density layout in space-constrained modules like ECUs and sensor nodes |
| Wide voltage range support | Part of 37-type series covering 2.4–75 V - allows single-supplier sourcing across multiple design generations |
| Controlled temperature coefficient | +65.6 to +79.8 mV/K at IZ = 2 mA - supports predictable thermal drift modeling in precision references |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 68 V reference for analog front-end comparators monitoring battery rail transients. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise trip threshold for overvoltage detection circuitry. Use Value: Enables accurate fault triggering within ±5 % tolerance while surviving 40 W surge events during load dump. |
Use Scenario: Biasing high-voltage op-amp inputs in 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Precision Zener clamp maintaining stable common-mode voltage under varying loop supply conditions. Use Value: Delivers <475 µA leakage and 35 pF capacitance to preserve signal integrity and minimize offset drift. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Protection |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters delivering 60–70 V outputs. IC Role / Device Role / Timing Role: Regulation element in optocoupler feedback network setting output voltage setpoint. Use Value: Maintains 64–72 V regulation window with 0.05 Ω rdiff to reduce output ripple sensitivity to current fluctuations. |
Use Scenario: Overvoltage guardrail in portable ultrasound imaging front-end power rails. IC Role / Device Role / Timing Role: Fail-safe clamp preventing >72 V excursions that could damage sensitive ADC input stages. Use Value: AEC-Q101 qualification and 150 °C max junction temperature ensure robustness in thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B68,115 | Same 68 V nominal, ±5 % tolerance, but SOD323 package with 200 mW Ptot rating and higher rdiff (100 Ω) | Limited to lower-power biasing due to reduced power handling and poorer regulation stiffness | Select when cost sensitivity outweighs surge robustness and regulation precision |
| MMSZ5262BT1G | 68 V nominal, ±5 %, SOD123 package (3.7 × 1.6 mm), 500 mW Ptot, but no AEC-Q101 qualification | Higher power margin but unsuitable for automotive deployments requiring qualified components | Choose for industrial power supplies needing higher continuous dissipation without automotive compliance |
Compared with BZX384-B68,115 and MMSZ5262BT1G, SZMM3Z68VT1GX uniquely balances automotive qualification, 300 mW power capability, ultra-low 0.05 Ω differential resistance, and compact SOD323 footprint - making it optimal for space- and reliability-critical automotive and medical applications.
Availability
SZMM3Z68VT1GX is available at Aetrix Electronics and suitable for automotive ECU designs, industrial sensor modules, consumer power adapters, and medical diagnostic equipment requiring stable component supply with full traceability and lifecycle management.
Supply support for SZMM3Z68VT1GX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET devices, with leadership in automotive-qualified components and energy-efficient solutions.
SZMM3Z68VT1GX belongs to the SZMM3Z series of AEC-Q101-qualified Zener diodes designed specifically for precision voltage regulation and overvoltage protection in automotive, industrial, and medical systems demanding compact size and proven reliability.
FAQ
What is the maximum continuous reverse current this Zener can handle?
The SZMM3Z68VT1GX supports up to 200 mA forward current per limiting values, but for Zener operation, the recommended test current is 2 mA. At this condition, it maintains 64–72 V regulation with ≤475 µA reverse leakage at 62 V - ensuring stable biasing without thermal runaway on standard FR4 PCBs.
How does the AEC-Q101 qualification impact its use in non-automotive applications?
AEC-Q101 qualification confirms rigorous stress testing including temperature cycling, humidity, and high-temperature operating life - resulting in enhanced long-term reliability, tighter parameter distribution, and improved robustness against thermal and mechanical stress, which directly benefits industrial and medical applications requiring extended field life.
Can this Zener be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, but even within the same batch, slight VZ mismatches cause current hogging. The SZMM3Z68VT1GX is not characterized for parallel operation; external ballast resistors or alternative topologies are required for increased power handling.
What is the significance of the 'DW' marking code on the device body?
The 'DW' marking code uniquely identifies the SZMM3Z68VT1GX variant per Nexperia's official marking table - distinguishing it from other voltages in the SZMM3Z series (e.g., 'DV' = 62 V, 'DX' = 75 V). This code enables rapid visual verification and automated optical inspection during assembly.
SZMM3Z68VT1GX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 240 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SZMM3Z68VT1GX FAQ
1.How can I place an order for SZMM3Z68VT1GX through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z68VT1GX 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 SZMM3Z68VT1GX reliable?
The price and inventory of SZMM3Z68VT1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z68VT1GX is usually 5 days.
3.What payment methods are accepted for SZMM3Z68VT1GX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z68VT1GX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z68VT1GX?
SZMM3Z68VT1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z68VT1GX 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 SZMM3Z68VT1GX?
For technical support, including SZMM3Z68VT1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z68VT1GX requirements.
6.How does Aetrix verify that SZMM3Z68VT1GX is sourced from the original manufacturer or authorized distributors?
All SZMM3Z68VT1GX 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 SZMM3Z68VT1GX meets industry standards.
7.What is the process for return or replacement of SZMM3Z68VT1GX?
All SZMM3Z68VT1GX units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z68VT1GX, 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 SZMM3Z68VT1GX part is unused and in its original packaging.
Return procedure for SZMM3Z68VT1GX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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