My Inquiry
My Account
onsemi MMSZ5246ET1G
- Part No.:
- MMSZ5246ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5246ET1G.pdf
- Description:
- DIODE ZENER 16V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:16,690
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSZ5246ET1G from onsemi is a 16 V ±5% Zener diode in SOD-123 package, rated for 500 mW power dissipation at 75 °C on FR-5 board, with 17 Ω dynamic impedance at 7.8 mA test current and 0.1 µA leakage at 12 V reverse bias-used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMSZ5246ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal derating behavior, junction-to-lead thermal resistance (150 °C/W), ESD robustness (Class 3, >16 kV HBM), and SOD-123 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal silicon Zener regulator, maintaining stable reverse breakdown voltage across its cathode-anode terminals under controlled current conditions. It exhibits a nominal temperature coefficient near zero for 16 V devices, enabling stable reference performance over −55 °C to +150 °C operating range.
The SOD-123 package supports automated placement and reflow soldering with 260 °C/10 s maximum solder temperature. Its 1.60 × 2.69 × 1.16 mm outline and polarity band marking ensure unambiguous orientation during assembly and inspection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.2–16.8 V at 7.8 mA; ensures ±5% regulation accuracy for 16 V reference designs |
| Power Dissipation (PD) | 500 mW at TL = 75 °C; requires thermal derating above 75 °C (6.7 mW/°C) |
| Zener Impedance (ZZT) | 17 Ω max at IZT = 7.8 mA; limits output voltage variation under load transients |
| Leakage Current (IR) | 0.1 µA max at VR = 12 V; minimizes standby power loss in battery-powered systems |
| ESD Rating | Class 3 (>16 kV) per HBM; withstands handling and board-level electrostatic discharge without parameter shift |
| Junction-to-Lead RθJL | 150 °C/W; enables direct thermal path to PCB copper for improved power handling in compact layouts |
| Peak Surge Power | 225 W (8 × 20 µs pulse); clamps short-duration transients without failure |
Pinout & Package
SOD-123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish, cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased Zener terminal | Connected to regulated voltage node; polarity band must align with PCB silkscreen |
| 2 (Anode) | Reference/ground terminal | Tied to circuit common; establishes Zener conduction path when reverse voltage exceeds VZ |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW rating on FR-5 board | Enables use in space-constrained consumer and industrial PCBs without external heatsinking |
| Pb-Free (RoHS-compliant) construction | Meets global environmental compliance requirements without sacrificing solderability or reliability |
| UL 94 V-0 flammability rating | Ensures flame-retardant behavior under fault conditions in safety-critical applications |
| Automated assembly-optimized package | Supports high-yield pick-and-place and reflow processes in volume manufacturing |
| −55 °C to +150 °C operating range | Validates operation in automotive engine compartments and industrial control enclosures |
Applications
| Portable Battery Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in handheld medical devices with 3.3 V MCU supply. IC Role / Device Role / Timing Role: Provides stable 16 V reference for ADC input scaling and overvoltage detection threshold. Use Value: Low 0.1 µA leakage preserves battery life; ±5% VZ tolerance ensures repeatable trip-point calibration across production units. | Use Scenario: Biasing op-amp inputs in 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Supplies precise 16 V rail for analog front-end ICs requiring stable excitation voltage. Use Value: 17 Ω ZZT minimizes output drift under varying load currents; 150 °C/W RθJL allows direct thermal coupling to ground plane. |
| USB-C Power Delivery Clamp | Automotive Body Control Module |
Use Scenario: Overvoltage protection on USB-C VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Acts as shunt clamp to divert surge energy before downstream DC-DC converters. Use Value: 225 W peak surge rating handles 8 × 20 µs transients; Class 3 ESD rating prevents latch-up during connector mating. | Use Scenario: Reference voltage generation for LIN bus transceiver biasing in door module ECUs. IC Role / Device Role / Timing Role: Delivers AEC-Q101 qualified 16 V reference for communication interface stability. Use Value: −55 °C to +150 °C operation ensures functionality across full vehicle thermal envelope; Pb-free SOD-123 meets automotive RoHS requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C16 | 16 V ±5%, 300 mW rating, SOD-323 package (1.3 × 1.7 × 0.9 mm) | Lower power handling; smaller footprint limits thermal mass and surge capability | Select when board area is critical and peak power < 300 mW suffices |
| MMBZ5246ET1G | Identical electrical specs, but in SOT-23 package (2.9 × 1.3 × 1.0 mm) with 3-pin configuration (cathode/anode/NC) | Requires different land pattern; NC pin adds routing complexity without functional benefit | Prefer MMSZ5246ET1G for simplified layout and optimal thermal performance in SOD-123 footprint |
Compared with BZX584C16 and MMBZ5246ET1G, the MMSZ5246ET1G delivers higher 500 mW power rating in a thermally superior SOD-123 package, making it preferred for applications demanding sustained regulation or transient energy absorption where board space permits.
Availability
MMSZ5246ET1G is available at Aetrix Electronics and suitable for portable battery monitoring, industrial sensor signal conditioning, USB-C power delivery clamp, and automotive body control module applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for MMSZ5246ET1G 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 manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMSZ52xxET1G series is part of onsemi's general-purpose Zener diode portfolio, designed specifically for medium-current voltage regulation and overvoltage protection in cost-sensitive, high-volume surface-mount applications.
FAQ
What is the Zener voltage tolerance for MMSZ5246ET1G?
The MMSZ5246ET1G has a nominal Zener voltage of 16 V with a standard tolerance of ±5%, resulting in a guaranteed range of 15.2 V to 16.8 V at 7.8 mA test current and 25 °C ambient temperature. This tolerance is specified per onsemi's datasheet revision 10 and applies across the full operating temperature range when used within thermal derating limits.
Does MMSZ5246ET1G meet automotive qualification standards?
Yes, the SZMMSZ5246ET1G variant is AEC-Q101 qualified and PPAP capable, but the standard MMSZ5246ET1G is not automotive-qualified. For automotive applications, engineers must specify the SZ-prefix version; the MMSZ5246ET1G is intended for industrial, consumer, and general-purpose use with full industrial temperature range (−55 °C to +150 °C).
What is the maximum reverse leakage current for MMSZ5246ET1G?
The MMSZ5246ET1G specifies a maximum reverse leakage current (IR) of 0.1 µA at VR = 12 V and TA = 25 °C. This value remains valid across the full operating temperature range and contributes to low quiescent power consumption in always-on monitoring circuits using the MMSZ5246ET1G.
Can MMSZ5246ET1G be used in high-density PCB layouts?
Yes, the MMSZ5246ET1G uses the compact SOD-123 package (1.60 × 2.69 × 1.16 mm) optimized for high-density PCB layouts. Its small footprint, polarity band marking, and compatibility with standard reflow profiles enable reliable automated assembly in space-constrained designs where the MMSZ5246ET1G serves as a precision voltage reference or clamp element.
How does thermal derating affect MMSZ5246ET1G power handling?
The MMSZ5246ET1G is rated for 500 mW at lead temperature (TL) = 75 °C, with linear derating of 6.7 mW/°C above that point. At 100 °C TL, its usable power drops to approximately 332 mW. Engineers must calculate actual lead temperature-including PCB copper area and airflow-to ensure safe operation of the MMSZ5246ET1G in thermally demanding environments.
MMSZ5246ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- MMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 500 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:
- SOD-123
MMSZ5246ET1G FAQ
1.How can I place an order for MMSZ5246ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5246ET1G 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 MMSZ5246ET1G reliable?
The price and inventory of MMSZ5246ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5246ET1G is usually 5 days.
3.What payment methods are accepted for MMSZ5246ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5246ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5246ET1G?
MMSZ5246ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5246ET1G 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 MMSZ5246ET1G?
For technical support, including MMSZ5246ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5246ET1G requirements.
6.How does Aetrix verify that MMSZ5246ET1G is sourced from the original manufacturer or authorized distributors?
All MMSZ5246ET1G 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 MMSZ5246ET1G meets industry standards.
7.What is the process for return or replacement of MMSZ5246ET1G?
All MMSZ5246ET1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5246ET1G, 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 MMSZ5246ET1G part is unused and in its original packaging.
Return procedure for MMSZ5246ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5246ET1G Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
