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onsemi MMBZ5246ELT3G
- Part No.:
- MMBZ5246ELT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5246ELT3G.pdf
- Description:
- DIODE ZENER 16V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,893
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Product details
Overview
MMBZ5246ELT3G from onsemi is a 16 V, 225 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers 7.8 mA test current at nominal Zener voltage, exhibits 17 Ω dynamic impedance at IZT, and maintains ≤0.1 µA reverse leakage at 12 V, making it suitable for battery-powered sensor nodes and low-power microcontroller voltage reference circuits.
For engineers reviewing the MMBZ5246ELT3G datasheet, pinout, applications, or equivalent options, key selection criteria include its 16 V nominal Zener voltage tolerance (±5%), thermal resistance of 556 °C/W on FR-5 board, ESD rating >16 kV HBM, and NC pin configuration-critical for layout validation and reliability assurance in portable electronics.
Technical Context
This device operates as a two-terminal voltage reference with cathode-anode polarity, where Zener breakdown occurs at precisely controlled reverse bias. Its 16 V nominal voltage falls within the positive temperature coefficient range (>5 V), ensuring stable regulation across −65°C to +150°C junction temperature.
The SOT-23 package features Pin 1 (Anode), Pin 2 (No Connection), and Pin 3 (Cathode), enabling unambiguous orientation during automated placement. Its 225 W peak pulse power rating (8 × 20 µs) supports transient suppression without derating under short-duration surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.2–16.8 V @ 7.8 mA - tight ±5% tolerance ensures accurate reference in analog sensing and ADC biasing. |
| Power Dissipation (PD) | 225 mW on FR-5 board - defines maximum continuous DC power handling at 25°C ambient. |
| Zener Impedance (ZZT) | 17 Ω @ IZT - low dynamic resistance minimizes output voltage variation under load changes. |
| Reverse Leakage (IR) | ≤0.1 µA @ 12 V - enables ultra-low standby current in always-on monitoring circuits. |
| ESD Rating | Class 3 (>16 kV HBM) - protects against electrostatic discharge during handling and PCB assembly. |
| Thermal Resistance (RJA) | 556 °C/W - determines junction temperature rise per milliwatt; critical for thermal margin analysis. |
| Peak Pulse Power | 225 W (8 × 20 µs) - supports transient voltage suppression without failure in surge-prone interfaces. |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body, Pb-free, void-free thermosetting plastic case with UL 94 V-0 flammability rating. Cathode indicated by band; Pin 2 is internally unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during Zener operation. |
| 2 | No Connection | Electrically isolated; must not be soldered to trace or pad to avoid mechanical stress or shorts. |
| 3 | Cathode | Connected to higher-potential node; carries regulated output voltage when used as shunt reference. |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW DC power rating on FR-5 | Enables compact voltage clamping in high-density PCBs without heatsinking. |
| 16 V nominal Zener voltage with ±5% tolerance | Provides stable reference for 3.3 V/5 V system rails and ADC reference buffers. |
| ESD robustness >16 kV HBM | Eliminates need for external ESD protection in handheld device front-end circuits. |
| NC pin architecture (Pin 2) | Reduces routing complexity and avoids false connections in automated assembly. |
| Pb-free, RoHS-compliant packaging | Meets global environmental compliance requirements for consumer and industrial shipments. |
Applications
| Portable Power Management | Microcontroller Voltage Reference |
|---|---|
|
Use Scenario: Regulating supply voltage for low-power Bluetooth LE modules in wearables. IC Role / Device Role / Timing Role: Shunt Zener regulator providing stable 16 V rail for charge pump ICs. Use Value: Maintains <0.1 µA leakage at 12 V, extending battery life beyond 12 months in sleep mode. |
Use Scenario: Biasing precision ADC input stages in IoT sensor hubs. IC Role / Device Role / Timing Role: Voltage reference source for 12-bit SAR ADC reference divider networks. Use Value: 17 Ω ZZT ensures <±2 LSB error under varying load currents up to 1 mA. |
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|
Use Scenario: Overvoltage clamp on LIN bus transceiver power input. IC Role / Device Role / Timing Role: Transient suppressor protecting 12 V supply pins from load dump spikes. Use Value: 225 W peak pulse rating absorbs 8 × 20 µs surges without degradation per AEC-Q101 stress tests. |
Use Scenario: Precision voltage threshold detection in 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Zener-based comparator reference for fault detection circuitry. Use Value: ±5% VZ tolerance enables reliable trip point setting at 16.0 V ±0.8 V across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C16LT1G | Same 16 V nominal, but 350 mW PD and 40 Ω ZZT; SOT-23 package with identical pinout. | Higher power handling suits higher-current shunt applications; less stable under dynamic loads. | Select when >225 mW continuous dissipation is required and 40 Ω ZZT is acceptable. |
| MMBZ5246BS-7-F | Same electrical specs, but in SOD-123 package (larger footprint, 500 mW PD); no NC pin. | Requires PCB redesign; better thermal performance but incompatible with ultra-dense layouts. | Choose only if thermal margin is insufficient with SOT-23 and board area permits larger footprint. |
Compared with BZX84-C16LT1G and MMBZ5246BS-7-F, the MMBZ5246ELT3G offers optimal balance of low-profile SOT-23 packaging, 17 Ω ZZT, and Class 3 ESD robustness-making it preferred for miniaturized, high-reliability portable designs where board space and transient immunity are critical.
Availability
MMBZ5246ELT3G is available at Aetrix Electronics and suitable for portable electronics, industrial sensor nodes, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MMBZ5246ELT3G 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxELT3G series targets space-constrained voltage regulation and protection in portable and high-density electronics, emphasizing low-leakage, high-ESD robustness, and consistent Zener performance across temperature.
FAQ
What is the exact Zener voltage tolerance of MMBZ5246ELT3G?
The MMBZ5246ELT3G has a guaranteed Zener voltage range of 15.2 V to 16.8 V at 7.8 mA test current, corresponding to ±5% tolerance around the nominal 16 V value. This specification is verified per onsemi's Electrical Characteristics table and applies at TA = 25°C with pulse testing to minimize self-heating effects. The MMBZ5246ELT3G maintains this tolerance across its full operating temperature range.
Does MMBZ5246ELT3G have a functional third pin?
No, MMBZ5246ELT3G uses a three-terminal SOT-23 package with Pin 2 designated as No Connection (NC). Internally, Pin 2 is electrically isolated and must not be bonded or soldered. This NC configuration simplifies layout and eliminates risk of unintended shorts-confirmed in the device marking diagram and Mechanical Characteristics section of the official datasheet for MMBZ5246ELT3G.
Can MMBZ5246ELT3G replace MMBZ5246ELT1G in production?
Yes, MMBZ5246ELT3G is functionally identical to MMBZ5246ELT1G in electrical and thermal specifications, differing only in reel quantity (10,000 vs. 3,000 units per tape-and-reel). Both share the same SOT-23 package, pinout (1-Anode, 2-NC, 3-Cathode), Zener voltage, and reliability qualifications-including AEC-Q101 compliance for automotive use. The MMBZ5246ELT3G is a direct logistics variant optimized for high-volume manufacturing.
What is the thermal resistance of MMBZ5246ELT3G on standard PCB material?
The MMBZ5246ELT3G has a junction-to-ambient thermal resistance (RJA) of 556 °C/W when mounted on FR-5 board per the Maximum Ratings table. This value assumes standard 1.0 × 0.75 × 0.62 inch test board conditions and defines the temperature rise above ambient per milliwatt of dissipated power. For alumina substrates, RJA improves to 417 °C/W, but FR-5 is the default reference for commercial designs using MMBZ5246ELT3G.
Is MMBZ5246ELT3G qualified for automotive applications?
Yes, MMBZ5246ELT3G is AEC-Q101 qualified and PPAP capable, meeting the stress test requirements for discrete semiconductors in automotive environments. While the base part number lacks the "SZ" prefix (which denotes automotive-specific traceability), its qualification status is explicitly stated in the Features section of the datasheet. The MMBZ5246ELT3G is approved for use in body control modules, infotainment power supplies, and other non-safety-critical automotive systems.
MMBZ5246ELT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 12 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5246ELT3G FAQ
1.How can I place an order for MMBZ5246ELT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5246ELT3G 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 MMBZ5246ELT3G reliable?
The price and inventory of MMBZ5246ELT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5246ELT3G is usually 5 days.
3.What payment methods are accepted for MMBZ5246ELT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5246ELT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5246ELT3G?
MMBZ5246ELT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5246ELT3G 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 MMBZ5246ELT3G?
For technical support, including MMBZ5246ELT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5246ELT3G requirements.
6.How does Aetrix verify that MMBZ5246ELT3G is sourced from the original manufacturer or authorized distributors?
All MMBZ5246ELT3G 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 MMBZ5246ELT3G meets industry standards.
7.What is the process for return or replacement of MMBZ5246ELT3G?
All MMBZ5246ELT3G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5246ELT3G, 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 MMBZ5246ELT3G part is unused and in its original packaging.
Return procedure for MMBZ5246ELT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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