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onsemi MMSZ5245CT1G
- Part No.:
- MMSZ5245CT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5245CT1G.pdf
- Description:
- DIODE ZENER 15V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:1,753
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Product details
Overview
MMSZ5245CT1G from onsemi is a 15 V ±2% Zener diode in SOD−123 package, rated for 500 mW power dissipation on FR−5 board at 75°C, with 8.5 mA test current (IZT), 16 Ω dynamic impedance (ZZT), and 0.1 µA reverse leakage at 11 V (VR). It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.
For engineers reviewing the MMSZ5245CT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 2% Zener tolerance, low 16 Ω impedance at 8.5 mA, 150°C junction temperature rating, ESD robustness (>16 kV HBM), and Pb−free SOD−123 surface-mount compatibility with automated assembly.
Technical Context
This device operates as a two-terminal silicon Zener diode optimized for stable reverse-biased voltage regulation under thermal equilibrium conditions (TL = 30°C ±1°C). Its Zener voltage is specified with junction in thermal equilibrium, not transient self-heating.
The MMSZ5245CT1G exhibits a nominal temperature coefficient of +8.5 mV/°C near 15 V, enabling predictable drift compensation in reference designs. Its 150°C maximum junction temperature and 340°C/W junction-to-ambient thermal resistance define thermal derating behavior above 75°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.7 V to 15.3 V @ IZT = 8.5 mA - tight 2% tolerance enables accurate voltage referencing without trimming. |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - supports stable operation in compact PCB layouts with defined thermal land pattern. |
| Zener Impedance (ZZT) | 16 Ω @ IZT = 8.5 mA - low dynamic impedance ensures minimal output voltage variation under load changes. |
| Reverse Leakage (IR) | 0.1 µA @ VR = 11 V - ultra-low leakage preserves battery life and signal integrity in high-impedance bias networks. |
| Junction Temperature | −55°C to +150°C - qualified for automotive under-hood and industrial control environments. |
| ESD Rating | Class 3 (>16 kV) per HBM - withstands handling and board-level ESD events without parameter shift. |
| Package | SOD−123 (Case 425) - 1.60 × 2.69 × 1.16 mm footprint enables high-density routing and reflow compatibility. |
Pinout & Package
SOD−123 surface-mount plastic package with cathode indicated by polarity band; 2-terminal device with no internal connections beyond anode and cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference node | Connected to regulated output or voltage sense point; polarity band identifies this terminal for correct orientation during placement. |
| 2 (Anode) | Reference ground return path | Typically tied to system ground or lower-potential rail; completes Zener conduction path during reverse breakdown. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables direct use in precision 15 V reference circuits without external calibration or trimming components. |
| 500 mW power rating on FR−5 board | Supports reliable operation in space-constrained consumer and industrial PCBs with standard thermal pad layout. |
| ESD robustness >16 kV (HBM) | Eliminates need for external ESD protection in front-end sensor interface and I/O conditioning stages. |
| Pb−free and RoHS-compliant | Meets global environmental compliance requirements for automotive, medical, and industrial end equipment. |
| Thermal equilibrium Zener specification | Guarantees voltage accuracy under steady-state thermal conditions, critical for metrology-grade references. |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in factory automation systems. IC Role / Device Role / Timing Role: Zener diode providing fixed 15 V reference for ADC driver amplifiers and sensor biasing. Use Value: Tight 2% tolerance and low 16 Ω impedance ensure <±10 mV reference drift across temperature and load variations. |
Use Scenario: Generating stable 15 V supply for microcontroller I/O voltage monitoring in BCMs. IC Role / Device Role / Timing Role: Voltage clamp and reference element in power supervisor circuitry. Use Value: −55°C to +150°C operating range and AEC−Q101 qualification support under-hood reliability requirements. |
| Portable Medical Instrument Power Rail Clamp | IoT Node Battery Voltage Monitor |
Use Scenario: Protecting analog front-end inputs from overvoltage transients in handheld diagnostic devices. IC Role / Device Role / Timing Role: Transient voltage suppressor and precision clamp at 15 V threshold. Use Value: 0.1 µA leakage at 11 V minimizes standby current draw, extending single-cell Li-ion battery life. |
Use Scenario: Scaling battery voltage for ADC input in wireless sensor nodes with 3.3 V MCU. IC Role / Device Role / Timing Role: Precision voltage divider reference node in resistive divider network. Use Value: Thermal equilibrium Zener spec ensures consistent scaling ratio across ambient temperature swings from −20°C to +70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C15 | 15 V ±5%, SOD-323 package, 300 mW rating, 30 Ω ZZT @ 5 mA | Higher impedance and wider tolerance reduce reference accuracy in precision analog circuits | Select when cost sensitivity outweighs 2% tolerance requirement and board space allows larger SOD-323 footprint |
| MMSZ4702T1G | 15 V ±5%, SOD-123 package, 500 mW rating, 30 Ω ZZT @ 10 mA, 1 µA IR @ 12 V | Looser tolerance and higher leakage limit use in low-power, non-critical biasing only | Choose for legacy designs where BOM rationalization favors same-series 5% variants with identical thermal performance |
Compared with MMSZ5245CT1G, BZX584C15 offers smaller size but sacrifices 2% tolerance and low-impedance regulation, while MMSZ4702T1G matches the SOD-123 package and power rating but trades precision and leakage performance for cost and availability.
Availability
MMSZ5245CT1G is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, portable medical instruments, and IoT node voltage monitoring requiring stable component supply and long-term manufacturability.
Supply support for MMSZ5245CT1G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ52xxxT1G series is designed for general-purpose, medium-current Zener regulation in surface-mount applications-emphasizing thermal stability, automated assembly compatibility, and broad voltage coverage from 2.4 V to 110 V.
FAQ
What is the Zener voltage tolerance of MMSZ5245CT1G?
The MMSZ5245CT1G has a ±2% Zener voltage tolerance, meaning its reverse breakdown voltage is guaranteed between 14.7 V and 15.3 V when measured at IZT = 8.5 mA and under thermal equilibrium conditions (TL = 30°C ±1°C). This tighter tolerance than the 5% MMSZ52xxBT1G series makes MMSZ5245CT1G suitable for precision reference applications where calibration overhead must be minimized.
What is the maximum power dissipation for MMSZ5245CT1G on a standard PCB?
MMSZ5245CT1G is rated for 500 mW total power dissipation on FR−5 board at TL = 75°C, with linear derating of 6.7 mW/°C above that temperature. Its thermal resistance junction-to-ambient is 340°C/W, so actual safe operating power depends on PCB copper area, airflow, and adjacent heat sources-designers must verify thermal performance using the specified minimum footprint per the datasheet.
Does MMSZ5245CT1G meet automotive qualification standards?
Yes-MMSZ5245CT1G is AEC−Q101 qualified and PPAP capable when ordered with the SZ prefix (e.g., SZMMSZ5245CT1G). The base MMSZ5245CT1G variant is manufactured to the same process and testing flow but lacks formal automotive documentation; for automotive production, specify the SZ-prefixed part to ensure full compliance traceability.
How does the Zener impedance of MMSZ5245CT1G affect voltage regulation stability?
MMSZ5245CT1G has a maximum Zener impedance (ZZT) of 16 Ω at IZT = 8.5 mA, which directly determines how much its output voltage varies with changes in Zener current. A lower ZZT means less voltage droop under increasing load or better rejection of ripple-this value enables stable 15 V references even with ±1 mA current fluctuations, critical for high-resolution ADC biasing.
What is the reverse leakage current specification for MMSZ5245CT1G?
MMSZ5245CT1G specifies a maximum reverse leakage current (IR) of 0.1 µA at VR = 11 V and TA = 25°C. This ultra-low leakage ensures minimal error in high-impedance voltage divider networks and preserves battery runtime in always-on IoT nodes-performance verified across the full −55°C to +150°C junction temperature range per datasheet Figure 8.
MMSZ5245CT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- MMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 11 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
MMSZ5245CT1G FAQ
1.How can I place an order for MMSZ5245CT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5245CT1G 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 MMSZ5245CT1G reliable?
The price and inventory of MMSZ5245CT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5245CT1G is usually 5 days.
3.What payment methods are accepted for MMSZ5245CT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5245CT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5245CT1G?
MMSZ5245CT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5245CT1G 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 MMSZ5245CT1G?
For technical support, including MMSZ5245CT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5245CT1G requirements.
6.How does Aetrix verify that MMSZ5245CT1G is sourced from the original manufacturer or authorized distributors?
All MMSZ5245CT1G 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 MMSZ5245CT1G meets industry standards.
7.What is the process for return or replacement of MMSZ5245CT1G?
All MMSZ5245CT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5245CT1G, 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 MMSZ5245CT1G part is unused and in its original packaging.
Return procedure for MMSZ5245CT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5245CT1G Tags
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