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Nexperia USA Inc. MM3Z39VT1GX
- Part No.:
- MM3Z39VT1GX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z39VT1GX.pdf
- Description:
- DIODE ZENER 39V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,640
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Product details
Overview
MM3Z39VT1GX from Nexperia is a 39 V ±5 % tolerance Zener diode in SOD323 (SC-76) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, with 27.3 Ω typical differential resistance at IZ = 2 mA and 130 µA max reverse current at VR = 33.4 V, used for precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the MM3Z39VT1GX datasheet, MM3Z39VT1GX pinout, MM3Z39VT1GX application, or MM3Z39VT1GX equivalent, this page delivers verified Zener parameters, cathode/anode terminal mapping, thermal resistance values (Rth(j-a) = 415 K/W), and real-world selection guidance against comparable 39 V Zeners for stable biasing and clamping functions.
Technical Context
This Zener operates in reverse breakdown mode with a nominal working voltage of 39 V at IZ = 2 mA, exhibiting a temperature coefficient of +0.05 mV/K and diode capacitance of 45 pF at f = 1 MHz and VR = 0 V. Its low differential resistance ensures tight regulation under varying load currents.
The device is characterized across Tj = 25 °C to 150 °C, with limiting values specifying maximum forward current of 200 mA, junction temperature up to 150 °C, and ambient operating range from −55 °C to +150 °C on FR4 PCB with standard footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 37.0 V to 41.0 V at IZ = 2 mA - defines stable regulation window for reference design |
| Differential Resistance (rdiff) | 27.3 Ω max at IZ = 2 mA - determines output impedance and load regulation error |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W at tp = 100 µs - supports transient surge suppression without failure |
| Reverse Current (IR) | 130 µA max at VR = 33.4 V - quantifies leakage below knee voltage for low-power standby accuracy |
| Thermal Resistance (Rth(j-a)) | 415 K/W - indicates self-heating rise per watt in free-air mounting, critical for derating |
| Forward Voltage (VF) | 1.1 V max at IF = 100 mA - defines conduction loss when used in series forward path |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with 2 leads; marking bar denotes cathode; dimensions: 1.8 mm × 1.35 mm × 0.95 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | 27.3 Ω max enables <1 % output deviation across 0.5–5 mA load current variation |
| ±5 % voltage tolerance | Tight initial calibration reduces need for post-layout trimming in reference circuits |
| 40 W surge capability | Withstands ESD and line transients without degradation when properly decoupled |
| 45 pF junction capacitance | Minimizes high-frequency loading in 100 kHz–1 MHz feedback paths and timing networks |
| −55 °C to +150 °C operation | Supports industrial and automotive under-hood applications without derating penalties |
Applications
| Reference Voltage Source | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 39 V reference for ADC voltage dividers and op-amp bias networks in sensor signal conditioning modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to establish fixed potential relative to ground. Use Value: 27.3 Ω rdiff limits output shift to <0.3 V across 10 mA load change, ensuring <0.8 % reference error. |
Use Scenario: Protecting microcontroller I/O pins from 48 V supply rail transients in industrial PLC input stages. IC Role / Device Role / Timing Role: Shunt clamp activated above 41 V to divert surge current away from sensitive logic inputs. Use Value: 40 W non-repetitive rating absorbs 100 µs surges without parametric shift or catastrophic failure. |
| Power Supply Feedback | Current Source Bias |
|
Use Scenario: Setting regulation threshold in secondary-side feedback loop of isolated DC-DC converters using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference defining output setpoint via resistor divider into TL431 or similar controller. Use Value: ±5 % tolerance and +0.05 mV/K TC ensure <±2 % output drift over −40 °C to +85 °C ambient range. |
Use Scenario: Establishing constant current for LED biasing or transistor base drive in low-power instrumentation front-ends. IC Role / Device Role / Timing Role: Series-connected Zener providing stable voltage drop across emitter resistor to fix IE. Use Value: 300 mW Ptot supports 7.7 mA continuous current at 39 V, sufficient for sub-10 mA analog stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B39,115 | Same 39 V nominal, ±5 %, but SOD323 package with 400 mW Ptot and 35 Ω rdiff | Higher power allows 10.3 mA continuous current; higher rdiff increases load regulation error | Select when higher continuous power margin is needed and tighter regulation is not critical |
| MMSZ5242B-TP | 39 V nominal, ±5 %, SOD123 package, 500 mW Ptot, 30 Ω rdiff, Rth(j-a) = 350 K/W | Larger footprint improves thermal performance but requires PCB layout change; higher surge rating | Choose for thermally constrained designs needing >300 mW average dissipation |
Compared with MM3Z39VT1GX, BZX384-B39 offers +33 % power headroom at cost of +29 % dynamic impedance, while MMSZ5242B-TP trades SOD323 compatibility for superior thermal resistance and higher surge tolerance in a larger package.
Availability
MM3Z39VT1GX is available at Aetrix Electronics and suitable for precision voltage reference, overvoltage protection, power supply feedback, and current source bias applications requiring stable component supply and traceable sourcing.
Supply support for MM3Z39VT1GX 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 delivering high-performance, reliable discrete, logic, and MOSFET solutions optimized for efficiency and miniaturization in consumer, industrial, and automotive systems.
The MM3Z series targets space-constrained, low-power regulation needs with ultra-small SOD323 packaging, emphasizing tight voltage tolerance, low dynamic impedance, and robust surge capability for modern portable and IoT electronics.
FAQ
What is the maximum continuous reverse current this Zener can handle at 39 V?
The MM3Z39VT1GX is not rated for continuous reverse current at its Zener voltage. Its maximum continuous power dissipation is 300 mW, so at 39 V, the safe average reverse current is limited to 7.7 mA (300 mW ÷ 39 V). Exceeding this risks thermal runaway due to junction temperature exceeding 150 °C.
Does this part have automotive qualification?
No, MM3Z39VT1GX is not automotive-qualified. Nexperia explicitly states in its legal disclaimers that unless a product data sheet expressly declares automotive qualification, the device is not tested or warranted for automotive use. This part meets industrial-grade reliability but lacks AEC-Q200 stress testing and qualification documentation.
How does the 415 K/W thermal resistance affect PCB layout?
A Rth(j-a) of 415 K/W means each watt of dissipated power raises the junction temperature by 415 K above ambient in free air. To maintain Tj ≤ 150 °C at 25 °C ambient, power must be limited to 302 mW - matching the rated 300 mW. Layout improvements like copper pour under the cathode pad reduce Rth(j-sp) to 110 K/W, enabling higher sustained power if solder-point cooling is implemented.
Can this Zener replace a 36 V or 43 V variant in an existing circuit?
Substituting MM3Z39VT1GX for 36 V or 43 V Zeners changes regulation voltage by ±7.7 %, which may shift reference points beyond acceptable error margins in precision circuits. Differential resistance also differs (25.2 Ω for 36 V, 30.1 Ω for 43 V), altering load regulation behavior. Direct replacement is only viable if system-level tolerance analysis confirms functional compliance.
MM3Z39VT1GX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- MM3Z
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 130 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
MM3Z39VT1GX FAQ
1.How can I place an order for MM3Z39VT1GX through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z39VT1GX 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 MM3Z39VT1GX reliable?
The price and inventory of MM3Z39VT1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z39VT1GX is usually 5 days.
3.What payment methods are accepted for MM3Z39VT1GX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z39VT1GX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z39VT1GX?
MM3Z39VT1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z39VT1GX 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 MM3Z39VT1GX?
For technical support, including MM3Z39VT1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z39VT1GX requirements.
6.How does Aetrix verify that MM3Z39VT1GX is sourced from the original manufacturer or authorized distributors?
All MM3Z39VT1GX 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 MM3Z39VT1GX meets industry standards.
7.What is the process for return or replacement of MM3Z39VT1GX?
All MM3Z39VT1GX units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z39VT1GX, 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 MM3Z39VT1GX part is unused and in its original packaging.
Return procedure for MM3Z39VT1GX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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