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onsemi MM5Z3V9T5G
- Part No.:
- MM5Z3V9T5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z3V9T5G.pdf
- Description:
- DIODE ZENER 3.9V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,191
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Product details
Overview
MM5Z3V9T5G from onsemi is a 3.9 V ±5% Zener diode in SOD−523 package, rated for 500 mW steady-state power dissipation at 25°C, with 90 Ω maximum Zener impedance at 5 mA test current and 3 μA reverse leakage at 1 V. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rail clamping and USB interface protection.
For engineers reviewing the MM5Z3V9T5G datasheet, pinout, applications, or equivalent options, key selection criteria include its 3.9 V nominal Zener voltage, low-profile 1.20 mm × 0.80 mm SOD−523 footprint, Class 3 ESD rating (>16 kV HBM), and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp or regulate voltage at its specified Zener voltage (3.7–4.2 V). Its thermal resistance of 250°C/W and derating slope of 4.0 mW/°C above 25°C define its safe operating envelope on FR-4 PCBs.
The MM5Z3V9T5G exhibits a temperature coefficient of −3.5 mV/°C at IZT, enabling predictable drift behavior across −65°C to +150°C junction temperature range. Its 450 pF capacitance at 0 V and 1 MHz supports high-frequency noise suppression in signal line protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.7–4.2 V @ IZT = 5 mA - defines precise clamping threshold for 3.3 V rail stabilization |
| Power Dissipation (PD) | 500 mW @ TA = 25°C - sets maximum continuous energy handling on standard PCB |
| Zener Impedance (ZZT) | 90 Ω max @ 5 mA - ensures stable regulation under dynamic load transients |
| Reverse Leakage (IR) | 3 μA max @ VR = 1 V - minimizes standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust electrostatic immunity without external protection |
| Package | SOD−523 (1.20 mm × 0.80 mm × 0.70 mm) - enables placement in ultra-dense mobile PCB layouts |
| Operating Temperature | −65°C to +150°C - supports extended industrial and automotive ambient conditions |
Pinout & Package
SOD−523 surface-mount package with cathode marked by polarity band; body dimensions 1.20 mm × 0.80 mm × 0.70 mm; lead finish 100% matte tin; MSL 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output or higher-potential node; polarity band identifies this terminal |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes reverse-bias conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements without lead-based solder compatibility compromises |
| AEC−Q101 Qualified | Validated for automotive applications including infotainment power rails and sensor interface protection |
| Low Capacitance (450 pF) | Minimizes signal distortion in high-speed data lines like USB 2.0 and I²C bus clamping |
| Stable Temperature Coefficient | −3.5 mV/°C enables predictable voltage shift over temperature-critical for precision analog references |
| Small Outline Footprint | 1.20 mm × 0.80 mm area saves >60% board space vs. SOD-123, enabling miniaturized wearable designs |
Applications
| Smartphone Power Rail Protection | USB Interface ESD Clamp |
|---|---|
Use Scenario: Clamping transient overvoltage on 3.3 V PMIC output rails during hot-plug events or inductive switching. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator to divert surge current away from sensitive SoC power inputs. Use Value: 3.9 V nominal breakdown prevents rail collapse below 3.3 V logic threshold while surviving 16 kV HBM ESD strikes. | Use Scenario: Protecting D+ and D− lines from ESD events during cable insertion into USB ports. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between differential data lines and ground. Use Value: 450 pF capacitance avoids signal integrity degradation at 480 Mbps USB 2.0 speeds while providing Class 3 ESD immunity. |
| Automotive Cabin Sensor Interface | IoT Edge Node Voltage Reference |
Use Scenario: Stabilizing supply to MEMS accelerometers and Hall-effect sensors in vehicle cabin modules. IC Role / Device Role / Timing Role: Precision Zener reference establishing stable bias point for analog front-end amplifiers. Use Value: AEC−Q101 qualification ensures operation across −40°C to +125°C ambient with <±5% VZ tolerance. | Use Scenario: Providing stable 3.9 V reference for ADC input scaling in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-leakage voltage reference enabling accurate sensor measurement with <3 μA standby drain. Use Value: 3 μA max reverse leakage at 1 V extends coin-cell battery life beyond 5 years in always-on sensing nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C3V9 | Same 3.9 V nominal Zener voltage but in SOD-323 package (1.7 mm × 1.3 mm); 350 mW power rating | Larger footprint and lower power limit reduce suitability for ultra-dense PCBs requiring 500 mW headroom | Select when legacy SOD-323 layout reuse is prioritized over space savings and thermal margin |
| MMSZ5227BT1G | 3.9 V Zener in SOD-123 package (3.7 mm × 1.6 mm); 500 mW rating but no AEC−Q101 qualification | Lacks automotive qualification and has higher 100 Ω ZZT, limiting use in safety-critical or high-reliability systems | Select for cost-sensitive industrial control boards where automotive qualification is unnecessary |
Compared with BZX584-C3V9 and MMSZ5227BT1G, the MM5Z3V9T5G delivers superior space efficiency (40% smaller footprint than SOD-323), full automotive qualification, and tighter Zener impedance-making it optimal for next-generation portable and automotive electronics where board area and reliability are constrained.
Availability
MM5Z3V9T5G is available at Aetrix Electronics and suitable for smartphone power rail protection, USB interface ESD clamping, and automotive cabin sensor interface applications requiring stable component supply and long-term lifecycle support.
Supply support for MM5Z3V9T5G 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 (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power and signal management solutions for automotive, industrial, cloud computing, and consumer electronics.
The MM5ZxxxT5G series was designed specifically for ultra-compact voltage regulation and ESD protection in space-constrained portable and automotive electronics, emphasizing low profile, high reliability, and environmental compliance.
FAQ
What is the nominal Zener voltage of the MM5Z3V9T5G and its tolerance?
The MM5Z3V9T5G has a nominal Zener voltage of 3.9 V with a tolerance of ±5%, meaning its actual breakdown voltage falls within 3.7 V to 4.2 V at 5 mA test current (IZT). This tight tolerance ensures consistent clamping performance across production units and supports reliable 3.3 V rail protection in portable electronics where voltage margins are narrow.
Is the MM5Z3V9T5G suitable for automotive applications?
Yes, the MM5Z3V9T5G is AEC−Q101 qualified and PPAP capable, confirming its suitability for automotive applications including infotainment power conditioning and cabin sensor interface protection. Its −65°C to +150°C operating temperature range and robust ESD immunity (>16 kV HBM) meet stringent automotive reliability requirements, making MM5Z3V9T5G appropriate for under-hood and interior module designs.
What is the maximum power dissipation of the MM5Z3V9T5G and how does it derate with temperature?
The MM5Z3V9T5G has a maximum steady-state power dissipation of 500 mW at 25°C ambient temperature on an FR-4 PCB. It derates linearly at 4.0 mW/°C above 25°C, reaching zero dissipation at 150°C ambient. This derating curve-documented in Figure 1 of the datasheet-must be applied during thermal design to ensure safe operation in enclosed or high-temperature environments where MM5Z3V9T5G is deployed.
Does the MM5Z3V9T5G have a specified Zener impedance, and why does it matter?
Yes, the MM5Z3V9T5G specifies a maximum Zener impedance (ZZT) of 90 Ω at 5 mA test current. This parameter quantifies how tightly the device maintains its Zener voltage under varying current loads; lower impedance means less voltage variation during transient surges. For MM5Z3V9T5G, this ensures stable clamping during fast-rising ESD events or load-switching transients in USB and sensor interfaces.
How is polarity identified on the MM5Z3V9T5G SOD−523 package?
The MM5Z3V9T5G uses a cathode band (dark stripe) on the SOD−523 package to identify Pin 1 (Cathode); Pin 2 (Anode) is the unmarked end. This marking aligns with JEDEC standard SOD−523 orientation and is visible under 10× magnification. Correct orientation is critical-reversing MM5Z3V9T5G in circuit causes forward conduction instead of Zener regulation, potentially damaging downstream components.
MM5Z3V9T5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±6.41%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 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
- Supplier Device Package:
- SOD-523
MM5Z3V9T5G FAQ
1.How can I place an order for MM5Z3V9T5G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z3V9T5G 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 MM5Z3V9T5G reliable?
The price and inventory of MM5Z3V9T5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z3V9T5G is usually 5 days.
3.What payment methods are accepted for MM5Z3V9T5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z3V9T5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z3V9T5G?
MM5Z3V9T5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z3V9T5G 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 MM5Z3V9T5G?
For technical support, including MM5Z3V9T5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z3V9T5G requirements.
6.How does Aetrix verify that MM5Z3V9T5G is sourced from the original manufacturer or authorized distributors?
All MM5Z3V9T5G 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 MM5Z3V9T5G meets industry standards.
7.What is the process for return or replacement of MM5Z3V9T5G?
All MM5Z3V9T5G units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z3V9T5G, 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 MM5Z3V9T5G part is unused and in its original packaging.
Return procedure for MM5Z3V9T5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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