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onsemi MM3Z68VT1G
- Part No.:
- MM3Z68VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z68VT1G.pdf
- Description:
- DIODE ZENER 68V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,235
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Product details
Overview
MM3Z68VT1G from onsemi is a 68 V, 300 mW Zener voltage regulator diode in SOD−323 package, designed for precision voltage reference and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 68 V at 2 mA test current, with dynamic impedance of 240 Ω at IZT and leakage current ≤0.05 µA at 47.6 V reverse bias, used in portable power rails and ESD-sensitive signal conditioning.
For engineers reviewing the MM3Z68VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (64–72 V), thermal resistance (416 °C/W), ESD rating (>16 kV HBM), low capacitance (35 pF), and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 68 V nominal regulation point targets intermediate-voltage rail monitoring and clamping in DC-DC feedback paths and battery management systems.
Designed for surface-mount assembly on FR-4 PCBs, it features Pb-free plating, UL 94 V−0 flammability rating, and 260°C soldering tolerance. The cathode-anode polarity is marked by a band, and its 1.7 mm × 1.25 mm footprint supports high-density layouts in handheld and IoT devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 64–72 V (nominal 68 V @ 2 mA); defines precise clamping threshold for overvoltage protection |
| Power Dissipation (PD) | 300 mW @ 25°C; limits continuous energy handling without thermal runaway |
| Zener Impedance (ZZT) | 240 Ω @ IZT = 2 mA; determines voltage regulation stability under dynamic load changes |
| Leakage Current (IR) | ≤0.05 µA @ VR = 47.6 V; ensures minimal standby power loss in always-on circuits |
| Capacitance (C) | 35 pF @ VR = 0 V, f = 1 MHz; enables use in high-frequency signal line protection without signal distortion |
| ESD Rating | Class 3 (>16 kV) per HBM; provides robust electrostatic immunity during handling and operation |
| Operating Temperature | −65°C to +150°C; supports deployment in automotive under-hood and industrial environments |
Pinout & Package
SOD−323 surface-mount package: 1.7 mm × 1.25 mm body, 0.9 mm height, cathode indicated by polarity band. Mounting position is unrestricted; compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased Zener terminal | Connected to regulated voltage node; absorbs excess current during overvoltage events |
| 2 (Anode) | Reference/ground terminal | Tied to system ground or lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including engine control and infotainment power domains |
| Pb-free construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 |
| Low profile (0.9 mm) | Enables stacking under shields or placement beneath connectors in ultra-thin mobile designs |
| UL 94 V−0 rated epoxy | Prevents flame propagation during fault conditions in enclosed consumer electronics enclosures |
| Thermal resistance (RJA) | 416 °C/W enables 300 mW operation on standard FR-4 without heatsinking |
Applications
| Cellular Baseband Power Rail Protection | Automotive Body Control Module (BCM) Reference |
|---|---|
Use Scenario: Clamping transient spikes on 5 V or 12 V supply lines feeding RF transceivers and audio codecs. IC Role / Device Role / Timing Role: Zener voltage regulator providing shunt-based overvoltage protection. Use Value: Limits voltage excursions to ≤72 V, preventing latch-up in sensitive analog front-ends while consuming <0.05 µA in standby. | Use Scenario: Stabilizing reference voltage for microcontroller ADC inputs monitoring battery voltage or sensor outputs. IC Role / Device Role / Timing Role: Precision Zener reference source with ±5.9% voltage tolerance and low tempco. Use Value: Delivers 68 V reference with <35 pF capacitance, avoiding signal coupling into adjacent CAN or LIN bus traces. |
| USB-C PD Feedback Divider Clamp | Industrial PLC Input Signal Conditioning |
Use Scenario: Protecting optocoupler feedback circuitry in isolated 60+ V USB-C power delivery adapters. IC Role / Device Role / Timing Role: Secondary-side Zener clamp limiting error amplifier input swing. Use Value: Maintains regulation at 68 V with 240 Ω impedance, ensuring stable loop response under load step transients. | Use Scenario: Guarding 24 V digital input channels against surges from inductive loads or field wiring faults. IC Role / Device Role / Timing Role: Transient voltage suppressor placed before Schmitt-trigger input buffers. Use Value: Withstands >16 kV ESD strikes and clamps to ≤72 V within nanoseconds, preserving downstream logic integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B68,115 | Same 68 V nominal Zener voltage, but 300 mW rating in SOD-323; higher leakage (≤0.1 µA @ 54.4 V) and no AEC−Q101 qualification | Targeted at commercial-grade consumer electronics, not automotive or industrial harsh environments | Select BZX384-B68,115 only when AEC−Q101 compliance and sub-0.05 µA leakage are not required |
| MMSZ5262ET1G | 68 V Zener in SOD-123 package (2.7 mm × 1.6 mm); larger footprint, higher power (500 mW), higher capacitance (50 pF) | Suitable where board space permits and higher surge energy absorption is needed | Choose MMSZ5262ET1G when thermal margin or transient energy handling exceeds 300 mW capability of MM3Z68VT1G |
Compared with BZX384-B68,115 and MMSZ5262ET1G, MM3Z68VT1G offers the smallest footprint (1.7 × 1.25 mm), lowest leakage (<0.05 µA), and automotive qualification - making it optimal for space- and reliability-critical designs where 300 mW dissipation suffices.
Availability
MM3Z68VT1G is available at Aetrix Electronics and suitable for cellular phone power management, automotive BCM reference circuits, and industrial PLC input protection requiring stable component supply and long-term lifecycle support.
Supply support for MM3Z68VT1G 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and edge applications.
MM3Z68VT1G belongs to the MM3ZxxxT1G Zener regulator series, engineered for compact, high-reliability voltage reference and clamping in portable and automotive electronics where miniaturization and AEC−Q101 compliance are essential.
FAQ
What is the nominal Zener voltage and tolerance of MM3Z68VT1G?
The MM3Z68VT1G has a nominal Zener voltage of 68 V with a tolerance range of 64 V to 72 V at 2 mA test current. This ±5.9% tolerance ensures predictable clamping behavior in overvoltage protection circuits while maintaining compatibility with standard 68 V reference design requirements. The MM3Z68VT1G achieves this specification under 25°C ambient conditions per the onsemi datasheet.
Is MM3Z68VT1G qualified for automotive applications?
Yes, MM3Z68VT1G is AEC−Q101 qualified and PPAP capable, confirming its suitability for automotive applications such as body control modules and infotainment power supplies. The MM3Z68VT1G meets rigorous stress testing for temperature cycling, humidity, and mechanical shock - a requirement not met by generic commercial Zener diodes. This qualification is explicitly stated in the official onsemi documentation.
What is the maximum power dissipation and derating behavior of MM3Z68VT1G?
MM3Z68VT1G has a steady-state power rating of 300 mW at 25°C ambient, derating linearly at 2.4 mW/°C above that temperature. Its thermal resistance is 416 °C/W, meaning junction temperature rises ~125°C above ambient at full rated power on a standard FR-4 board. This derating curve is validated per the datasheet's Figure 7 and must be applied in thermal design for sustained operation.
Does MM3Z68VT1G have Pb-free and RoHS-compliant construction?
Yes, MM3Z68VT1G uses Pb-free plating and complies with RoHS Directive 2011/65/EU. The device marking includes the "G" suffix indicating Pb-free packaging, and the SOD−323 case is void-free transfer-molded plastic with corrosion-resistant finish. This construction aligns with onsemi's global environmental policy and supports lead-free reflow soldering at 260°C for 10 seconds.
What is the Zener impedance and leakage current specification for MM3Z68VT1G?
MM3Z68VT1G exhibits a maximum Zener impedance (ZZT) of 240 Ω at 2 mA test current, ensuring stable regulation under dynamic load shifts. Its reverse leakage current is ≤0.05 µA at 47.6 V (70% of nominal VZ), critical for low-power always-on circuits. These values are measured per the Electrical Characteristics table on page 2 of the official onsemi datasheet for MM3Z68VT1G.
MM3Z68VT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 68 V
- Tolerance:
- ±6%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 240 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
MM3Z68VT1G FAQ
1.How can I place an order for MM3Z68VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z68VT1G 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 MM3Z68VT1G reliable?
The price and inventory of MM3Z68VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z68VT1G is usually 5 days.
3.What payment methods are accepted for MM3Z68VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z68VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z68VT1G?
MM3Z68VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z68VT1G 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 MM3Z68VT1G?
For technical support, including MM3Z68VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z68VT1G requirements.
6.How does Aetrix verify that MM3Z68VT1G is sourced from the original manufacturer or authorized distributors?
All MM3Z68VT1G 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 MM3Z68VT1G meets industry standards.
7.What is the process for return or replacement of MM3Z68VT1G?
All MM3Z68VT1G units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z68VT1G, 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 MM3Z68VT1G part is unused and in its original packaging.
Return procedure for MM3Z68VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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