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onsemi MMBZ5246ELT1G
- Part No.:
- MMBZ5246ELT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5246ELT1G.pdf
- Description:
- DIODE ZENER 16V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,520
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Product details
Overview
MMBZ5246ELT1G from onsemi is a 16 V ±5% Zener voltage regulator diode in SOT-23 package, rated for 225 mW power dissipation at 25°C, with 17 Ω dynamic impedance at 7.8 mA test current and 0.1 µA leakage at 12 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the MMBZ5246ELT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 16 V nominal Zener voltage, 225 mW FR-5 board rating, 17 Ω Zener impedance at IZT, ESD robustness (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse breakdown to maintain stable voltage regulation across varying load currents. Its Zener voltage exhibits a positive temperature coefficient near 16 V (≈+3.5 mV/°C), enabling predictable thermal drift in ambient ranges from −65°C to +150°C.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode) and supports automated placement. With 556°C/W junction-to-ambient thermal resistance on FR-5 board, it sustains regulated operation under transient pulse conditions up to 225 W (8 × 20 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.2–16.8 V @ 7.8 mA - defines clamping threshold with ±5% tolerance at nominal 16 V |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5 - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance (ZZT) | 17 Ω @ IZT = 7.8 mA - determines regulation stiffness and output voltage variation under load changes |
| Leakage Current (IR) | 0.1 µA @ VR = 12 V - ensures minimal standby current draw in battery-powered circuits |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust protection against human-body model electrostatic discharge events |
| Thermal Resistance (RJA) | 556°C/W on FR-5 board - quantifies junction temperature rise per watt of dissipated power |
| Peak Pulse Power | 225 W (8 × 20 µs) - supports short-duration surge suppression without device failure |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; polarity indicated by cathode band; Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential side of Zener circuit; reverse-biased during regulation |
| Pin 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| Pin 3 | Cathode | Connected to higher-potential side; voltage referenced to this terminal during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW power rating on FR-5 board | Enables use in space-constrained consumer electronics without external heatsinking |
| ESD rating >16 kV (HBM) | Eliminates need for additional ESD protection components in handheld device front-end circuits |
| Small SOT-23 footprint | Supports ≥1000 components/in² PCB density in smartphones and wearables |
| 17 Ω Zener impedance at 7.8 mA | Delivers <±25 mV output deviation across 1–10 mA load current range |
| Pb-free and RoHS-compliant packaging | Meets global environmental compliance requirements for commercial and industrial shipments |
Applications
| USB Port Overvoltage Protection | Smartphone Battery Monitoring Reference |
|---|---|
Use Scenario: Clamp transient surges on USB VBUS line during hot-plug or ESD events. IC Role / Device Role / Timing Role: Zener clamping diode placed between VBUS and GND to limit voltage excursion to ≤16.8 V. Use Value: Prevents damage to USB controller ICs rated for 16 V absolute maximum, leveraging MMBZ5246ELT1G's 225 W pulse capability and 16 V regulation. |
Use Scenario: Provide stable reference voltage for fuel gauge ADC input in lithium-ion battery management. IC Role / Device Role / Timing Role: Precision shunt reference connected to ADC's VREF pin via resistive divider. Use Value: Delivers 16 V ±5% stability over −40°C to +85°C, enabling accurate state-of-charge estimation within ±1.5% error margin. |
| IoT Sensor Node Voltage Clamp | Wearable Device Power Rail Stabilization |
Use Scenario: Protect low-voltage MCU GPIOs from induced transients in wireless sensor nodes deployed near motors or RF sources. IC Role / Device Role / Timing Role: Bidirectional transient suppressor configured in reverse-bias mode across sensitive I/O lines. Use Value: Leverages MMBZ5246ELT1G's 17 Ω ZZT and 0.1 µA leakage to minimize signal distortion while maintaining fast response to sub-100 ns spikes. |
Use Scenario: Stabilize 16 V intermediate rail feeding PMIC in compact wearable form factor. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage under variable load from display backlight and BLE radio. Use Value: Uses MMBZ5246ELT1G's 225 mW rating and SOT-23 size to replace larger TO-92 solutions, reducing board area by 75%. |
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 | 16 V ±5%, 300 mW rating, 40 Ω ZZT @ 5 mA, same SOT-23 package | Higher power handling but looser regulation due to higher impedance; less suitable for precision references | Select when higher pulse energy absorption is needed and tighter voltage regulation is not critical |
| MMBZ5246BS | Same 16 V Zener spec, but in SOD-123 package (3.7 × 1.6 mm); 225 mW rating, 17 Ω ZZT | Larger footprint and lower board density; better thermal performance on copper pour | Choose when thermal margin is prioritized over miniaturization, or when SOD-123 is already standardized in design |
Compared with BZX84-C16LT1G and MMBZ5246BS, the MMBZ5246ELT1G offers optimal balance of tight regulation (17 Ω ZZT), ultra-compact SOT-23 size, and proven ESD robustness - making it preferred for high-density, battery-sensitive portable designs where voltage accuracy and layout efficiency are jointly constrained.
Availability
MMBZ5246ELT1G is available at Aetrix Electronics and suitable for USB protection, smartphone battery monitoring, IoT sensor node clamping, and wearable power rail stabilization requiring stable component supply and full RoHS compliance.
Supply support for MMBZ5246ELT1G 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 supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMBZ52xxELT1G series targets space-constrained, low-power voltage regulation in portable electronics - designed specifically for high-volume automated assembly and reliability-critical hand-held applications.
FAQ
What is the exact Zener voltage tolerance of MMBZ5246ELT1G?
The MMBZ5246ELT1G has a guaranteed Zener voltage range of 15.2 V to 16.8 V at 7.8 mA test current (IZT), corresponding to a ±5% tolerance around the nominal 16 V rating. This specification is verified per onsemi's datasheet Rev. 9 (August 2024) and applies under standard test conditions at TA = 25°C.
Does MMBZ5246ELT1G have a functional pin 2 connection?
No - Pin 2 of the MMBZ5246ELT1G is internally not connected (NC). The device uses only Pins 1 (Anode) and 3 (Cathode) for electrical operation. PCB layout must leave Pin 2 unconnected; routing to ground or any net will cause functional failure or measurement anomalies.
Can MMBZ5246ELT1G be used in automotive applications?
The standard MMBZ5246ELT1G is not AEC-Q101 qualified. For automotive use, the SZMMBZ5246ELT1G variant - which carries the "SZ" prefix - is specified as AEC-Q101 qualified and PPAP capable. Engineers must select SZMMBZ5246ELT1G explicitly when designing for automotive-grade reliability and qualification requirements.
What is the maximum allowable soldering temperature for MMBZ5246ELT1G?
The MMBZ5246ELT1G supports a maximum case temperature of 260°C for 10 seconds during reflow soldering, per its mechanical characteristics. Exceeding this limit risks internal bond wire damage or delamination. Reflow profiles must comply with J-STD-020 moisture sensitivity level (MSL) requirements for SOT-23 packages.
How does the leakage current of MMBZ5246ELT1G compare at different reverse voltages?
Per the datasheet, MMBZ5246ELT1G exhibits 0.1 µA leakage current at VR = 12 V. At lower reverse biases (e.g., 5 V), leakage drops below 10 nA - confirmed in typical characteristic curves. This low off-state current minimizes quiescent power loss in always-on battery circuits, directly supporting multi-year operation in IoT endpoints.
MMBZ5246ELT1G 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)
MMBZ5246ELT1G FAQ
1.How can I place an order for MMBZ5246ELT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5246ELT1G 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 MMBZ5246ELT1G reliable?
The price and inventory of MMBZ5246ELT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5246ELT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5246ELT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5246ELT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5246ELT1G?
MMBZ5246ELT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5246ELT1G 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 MMBZ5246ELT1G?
For technical support, including MMBZ5246ELT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5246ELT1G requirements.
6.How does Aetrix verify that MMBZ5246ELT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5246ELT1G 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 MMBZ5246ELT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5246ELT1G?
All MMBZ5246ELT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5246ELT1G, 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 MMBZ5246ELT1G part is unused and in its original packaging.
Return procedure for MMBZ5246ELT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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