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onsemi SZMM3Z2V4T1G
- Part No.:
- SZMM3Z2V4T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z2V4T1G.pdf
- Description:
- DIODE ZENER 2.4V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,675
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Product details
Overview
SZMM3Z2V4T1G from onsemi is a 2.4 V ±0.2 V Zener diode in SOD−323 package, rated for 300 mW steady-state power dissipation at 25°C, with 100 Ω maximum Zener impedance at 5 mA test current and 0.5 μA leakage current at 1 V reverse bias. It provides precision low-voltage regulation in space-constrained portable electronics.
For engineers reviewing the SZMM3Z2V4T1G datasheet, pinout, applications, or equivalent options, key selection factors include its 2.4 V nominal Zener voltage, 100 Ω dynamic impedance, −3.5 mV/°C temperature coefficient, AEC−Q101 qualification, and SOD−323 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference by maintaining a stable reverse breakdown voltage across its cathode–anode terminals under controlled current conditions. Its design targets low-power, low-voltage regulation where tight tolerance (±0.2 V), low dynamic impedance (100 Ω @ 5 mA), and minimal thermal drift (−3.5 mV/°C) are critical.
The SOD−323 package enables surface-mount integration with 1.7 mm × 1.25 mm body dimensions and 0.9 mm height, supporting automated assembly and thermal management via 416 °C/W junction-to-ambient resistance. ESD robustness exceeds 16 kV (HBM Class 3) and it meets UL 94 V−0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.4 V nominal, 2.2–2.6 V range at IZT = 5 mA - defines precise low-voltage clamping threshold |
| Power Dissipation (PD) | 300 mW @ TA = 25°C - sets maximum continuous operating power before thermal derating |
| Zener Impedance (ZZT) | 100 Ω max @ IZT = 5 mA - ensures minimal voltage variation under load transients |
| Leakage Current (IR) | 0.5 μA max @ VR = 1 V - guarantees low standby current in battery-powered systems |
| Temperature Coefficient | −3.5 mV/°C - quantifies voltage drift over temperature for stability-critical references |
| ESD Rating | Class 3 (>16 kV HBM) - enables handling without special ESD controls in production |
| Package | SOD−323 (Case 477) - 1.7 mm × 1.25 mm × 0.9 mm footprint for ultra-compact PCB layout |
Pinout & Package
SOD−323 package with cathode indicated by polarity band; total weight 4.507 mg/unit; mounting position unrestricted; Pb-free plating (Sn only); UL 94 V−0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased Zener terminal | Connected to regulated voltage node; polarity band identifies this terminal for correct orientation |
| 2 (Anode) | Reference ground/reference return | Typically tied to system ground or bias rail; completes Zener conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including engine control modules and infotainment power rails |
| Low-profile SOD−323 | 0.9 mm height enables stacking under shields or placement beneath connectors in slim devices |
| High ESD immunity | 16 kV HBM rating eliminates need for external ESD protection in handheld interface circuits |
| Pb-free construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1 marking |
| Stable low-voltage reference | 2.4 V ±0.2 V tolerance supports accurate ADC reference or microcontroller brown-out detection |
Applications
| Smartphone Power Management | Wearable Sensor Biasing |
|---|---|
Use Scenario: Regulating voltage for PMIC internal LDO feedback or battery fuel gauge reference in compact smartphones. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 2.4 V reference for analog monitoring circuitry. Use Value: Enables accurate battery state-of-charge estimation within 1.7 mm × 1.25 mm board area, reducing BOM count vs. discrete resistor-divider + op-amp solutions. | Use Scenario: Supplying precise bias voltage to MEMS accelerometers and optical heart-rate sensors in fitness trackers. IC Role / Device Role / Timing Role: Low-drift voltage clamp ensuring consistent sensor output linearity across −20°C to +70°C ambient. Use Value: −3.5 mV/°C tempco maintains <±1% reference error over full operating range, eliminating calibration per unit. |
| Automotive Body Control Module | Industrial IoT Edge Node |
Use Scenario: Overvoltage protection and reference generation for LIN bus transceiver supply rails in door module ECUs. IC Role / Device Role / Timing Role: AEC−Q101-qualified Zener regulator stabilizing 2.4 V logic-level interface between MCU and LIN PHY. Use Value: Eliminates need for external TVS + regulator combo; 16 kV HBM rating withstands automotive ESD events without failure. | Use Scenario: Providing stable reference for 12-bit SAR ADC measuring 4–20 mA loop current in predictive maintenance gateways. IC Role / Device Role / Timing Role: Precision shunt reference establishing known voltage drop across sense resistor for current measurement. Use Value: 100 Ω ZZT limits reference error to <0.5 mV under 5 mA load variation, enabling ±0.1% current accuracy. |
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-B2V4,115 | 2.4 V ±5% tolerance (vs. ±0.2 V), 350 mW PD, SOD-323 package, no AEC−Q101 qualification | Targeted at consumer-grade power supplies; lacks automotive reliability validation | Select when cost sensitivity outweighs precision and automotive compliance requirements |
| MMSZ4678T1G | 2.4 V ±5%, 500 mW PD, SOD-123 package (2.7 mm × 1.6 mm), same −3.5 mV/°C tempco | Larger footprint reduces board density; higher power allows higher current regulation | Choose when higher power margin is needed and 0.9 mm height constraint is relaxed |
Compared with BZX384-B2V4,115 and MMSZ4678T1G, SZMM3Z2V4T1G delivers tighter voltage tolerance (±0.2 V), automotive qualification, and smallest form factor - making it optimal for space- and reliability-critical embedded designs where 2.4 V reference stability is non-negotiable.
Availability
SZMM3Z2V4T1G is available at Aetrix Electronics and suitable for smartphone power management, wearable sensor biasing, automotive body control modules, industrial IoT edge nodes, and high-density PC board applications requiring stable component supply and AEC−Q101 compliance.
Supply support for SZMM3Z2V4T1G 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 IoT applications.
SZMM3Z2V4T1G belongs to the MM3ZxxxT1G/SZMM3ZxxxT1G series - engineered specifically for low-voltage, high-reliability Zener regulation in miniaturized portable and automotive electronics.
FAQ
What is the nominal Zener voltage and tolerance of SZMM3Z2V4T1G?
The SZMM3Z2V4T1G has a nominal Zener voltage of 2.4 V with a guaranteed range of 2.2 V to 2.6 V at 5 mA test current (IZT). This ±0.2 V tolerance enables precise low-voltage clamping in reference and protection circuits where tight regulation is required, such as microcontroller reset thresholds or ADC reference inputs.
Is SZMM3Z2V4T1G qualified for automotive applications?
Yes, SZMM3Z2V4T1G is AEC−Q101 qualified and PPAP capable. The "SZ" prefix explicitly denotes automotive-grade manufacturing controls, site-specific change management, and stress testing per automotive reliability standards - making it suitable for use in body control modules, infotainment systems, and other vehicle subsystems.
What is the maximum Zener impedance of SZMM3Z2V4T1G and at what condition is it specified?
The maximum Zener impedance (ZZT) of SZMM3Z2V4T1G is 100 Ω, measured at the test current IZT = 5 mA and ambient temperature TA = 25°C. This low dynamic impedance ensures minimal voltage variation during transient load changes, critical for maintaining reference stability in sensitive analog circuits powered by SZMM3Z2V4T1G.
Does SZMM3Z2V4T1G have Pb-free construction and RoHS compliance?
Yes, SZMM3Z2V4T1G is Pb-free and complies with the EU RoHS Directive 2011/65/EU. Its terminations are plated with pure tin (Sn only), and the device carries the "G" suffix per onsemi's packaging nomenclature, confirming full environmental compliance without lead-based solder alloys.
What is the thermal resistance and power derating behavior of SZMM3Z2V4T1G?
SZMM3Z2V4T1G has a junction-to-ambient thermal resistance (RJA) of 416 °C/W on FR-4 board with 1 cm² copper pad. Its power rating derates linearly above 25°C at 2.4 mW/°C, reaching zero dissipation at approximately 138°C ambient - a key parameter for thermal design in sealed enclosures or high-temperature environments where SZMM3Z2V4T1G operates.
SZMM3Z2V4T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.4 V
- Tolerance:
- ±8%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SZMM3Z2V4T1G FAQ
1.How can I place an order for SZMM3Z2V4T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z2V4T1G 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 SZMM3Z2V4T1G reliable?
The price and inventory of SZMM3Z2V4T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z2V4T1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z2V4T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z2V4T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z2V4T1G?
SZMM3Z2V4T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z2V4T1G 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 SZMM3Z2V4T1G?
For technical support, including SZMM3Z2V4T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z2V4T1G requirements.
6.How does Aetrix verify that SZMM3Z2V4T1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z2V4T1G 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 SZMM3Z2V4T1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z2V4T1G?
All SZMM3Z2V4T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z2V4T1G, 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 SZMM3Z2V4T1G part is unused and in its original packaging.
Return procedure for SZMM3Z2V4T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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