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onsemi MMSZ5244ET1
- Part No.:
- MMSZ5244ET1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5244ET1.pdf
- Description:
- DIODE ZENER 14V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:7,537
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Product details
Overview
MMSZ5244ET1 from onsemi is a 14 V ±5% Zener diode in SOD-123 package, rated for 500 mW power dissipation at 75 °C on FR-5 board, with 9.0 mA test current (IZT), 15 Ω dynamic impedance (ZZT), and 0.1 µA reverse leakage at 10 V (IR). It serves as a precision voltage reference or overvoltage clamp in low-power analog and digital supply regulation circuits.
For engineers reviewing the MMSZ5244ET1 datasheet, pinout, applications, or equivalent options, this device is selected for stable 14 V reference generation in space-constrained PCBs where thermal derating, ESD robustness (>16 kV HBM), and AEC-Q101-compliant variants are critical.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable voltage across its terminals under varying load and temperature conditions. Its 14 V nominal Zener voltage is specified at IZT = 9.0 mA with ±5% tolerance, and it exhibits a temperature coefficient near zero in the 12–18 V range per onsemi's typical TC curves.
The device features low dynamic impedance (15 Ω at IZT) and tight leakage control (0.1 µA max at VR = 10 V), enabling accurate clamping in signal conditioning and power rail protection. Its SOD-123 package supports automated placement and delivers 340 °C/W junction-to-ambient thermal resistance on standard FR-5 boards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.3–14.7 V @ IZT = 9.0 mA; ensures stable 14 V reference within ±5% tolerance under nominal bias |
| Power Dissipation (PD) | 500 mW @ TL = 75 °C; supports continuous operation in compact layouts with controlled board thermal mass |
| Zener Impedance (ZZT) | 15 Ω @ IZT = 9.0 mA; minimizes output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | 0.1 µA @ VR = 10 V; prevents excessive quiescent current in high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV HBM); withstands handling and assembly without protection circuitry |
| Junction Temp Range | −55 °C to +150 °C; suitable for automotive under-hood and industrial ambient environments |
Pinout & Package
Package: SOD-123 - surface-mount plastic case (1.60 × 2.69 × 1.16 mm), cathode indicated by band, Pb-free, UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal during Zener operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes bias path for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in medium-current reference and clamp applications without external heat sinking |
| 15 Ω Dynamic Impedance | Delivers <15 mV output shift per 1 mA load change-critical for precision feedback paths |
| 0.1 µA Max Leakage @ 10 V | Preserves accuracy in high-resistance divider networks (e.g., >1 MΩ top-leg resistors) |
| AEC-Q101 Qualified (SZ variant) | Validated for automotive electronics requiring reliability under thermal cycling and vibration stress |
| SOD-123 Footprint | Supports high-density routing and reflow-compatible assembly on standard SMT lines |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) Supply Clamp |
|---|---|
Use Scenario: Stabilizing ADC reference voltage in 24 V-powered temperature/humidity sensors operating from unregulated rails. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed 14 V bias to op-amp gain stages and ADC reference buffers. Use Value: Tight 14 V ±5% tolerance and low ZZT ensure <0.5% reference error across −40 °C to +105 °C ambient. |
Use Scenario: Clamping transient spikes on 12 V battery-supplied microcontroller I/O lines during load dump events. IC Role / Device Role / Timing Role: Overvoltage protection element shunting surge energy above 14 V to ground before IC damage occurs. Use Value: 225 W peak surge rating (8 × 20 µs) and 16 kV HBM ESD rating enable single-device transient suppression without TVS co-location. |
| Low-Power IoT Node Voltage Reference | Consumer Audio DC Bias Network |
Use Scenario: Generating stable bias for RF front-end LNA and MCU reset supervisor in battery-operated BLE modules. IC Role / Device Role / Timing Role: Precision Zener reference supplying 14 V to voltage supervisor ICs and biasing active filters. Use Value: 0.1 µA leakage at 10 V enables multi-year battery life in always-on wake-up circuits. |
Use Scenario: Setting DC operating point for Class-AB headphone amplifier input stages powered from shared 15 V rail. IC Role / Device Role / Timing Role: Zener-based virtual ground generator establishing symmetrical ±7 V bias for dual-supply op-amps. Use Value: Low 15 Ω impedance maintains bias stability despite 10–100 µA current fluctuations from audio signal swing. |
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-C15LT1G | 15 V nominal (14.3–15.7 V), 300 mW rating, SOT-23 package, 30 Ω ZZT @ 5 mA | Higher voltage tolerance and lower power limit reduce margin in 14 V reference designs; smaller SOT-23 footprint limits thermal capacity | Select when board space is constrained and 15 V target suffices; verify thermal derating at 75 °C ambient |
| MMBZ5244ET1G | Identical electrical specs (14 V, 9 mA IZT, 15 Ω ZZT), same SOD-123 package, but in SOT-23-compatible tape-and-reel format | No functional difference; identical performance and layout compatibility-only packaging logistics differ | Prefer for high-volume SMT line integration where reel orientation or carrier tape compliance is required |
Compared with BZX84-C15LT1G and MMBZ5244ET1G, the MMSZ5244ET1 offers superior thermal capability (500 mW vs. 300 mW), tighter impedance (15 Ω vs. 30 Ω), and direct drop-in compatibility with legacy SOD-123 footprints-making it optimal for thermally demanding or precision-critical 14 V reference roles.
Availability
MMSZ5244ET1 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control module protection, and low-power IoT node voltage reference applications requiring stable component supply and long-term lifecycle support.
Supply support for MMSZ5244ET1 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 MMSZ52xxET1G series is part of onsemi's general-purpose Zener regulator portfolio, designed specifically for cost-sensitive, high-volume voltage reference and overvoltage protection in surface-mount systems.
FAQ
What is the Zener voltage tolerance of the MMSZ5244ET1?
The MMSZ5244ET1 has a nominal Zener voltage of 14 V with a standard tolerance of ±5%, resulting in a guaranteed range of 13.3 V to 14.7 V when measured at IZT = 9.0 mA and TL = 30 °C ±1 °C. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet.
Does the MMSZ5244ET1 meet automotive qualification standards?
The MMSZ5244ET1 itself is not AEC-Q101 qualified; however, its SZ-prefix variant-SZMMSZ5244ET1G-is explicitly certified for automotive use and PPAP capable. Engineers requiring automotive-grade assurance must specify the SZ version, which shares identical electrical parameters and SOD-123 packaging.
What is the maximum reverse leakage current for the MMSZ5244ET1?
The MMSZ5244ET1 specifies a maximum reverse leakage current (IR) of 0.1 µA at VR = 10 V and TA = 25 °C. This value is verified in the Electrical Characteristics table and supports low-power bias network designs where leakage-induced error must remain below 1 µA.
Can the MMSZ5244ET1 be used in pulse-clamping applications?
Yes-the MMSZ5244ET1 supports nonrepetitive surge pulses up to 225 W (8 × 20 µs waveform) per Figure 11 in the datasheet. Its ability to absorb transient energy makes it suitable for short-duration overvoltage clamping, provided average power remains within the 500 mW derated limit.
Is the MMSZ5244ET1 RoHS compliant and lead-free?
Yes-the "G" suffix in the full part number MMSZ5244ET1G indicates Pb-free construction, and the device complies with RoHS Directive 2011/65/EU. The base part number MMSZ5244ET1 refers to the same Pb-free device; the "G" is included in ordering codes to denote compliance per onsemi's packaging nomenclature.
MMSZ5244ET1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10 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
MMSZ5244ET1 FAQ
1.How can I place an order for MMSZ5244ET1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5244ET1 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 MMSZ5244ET1 reliable?
The price and inventory of MMSZ5244ET1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5244ET1 is usually 5 days.
3.What payment methods are accepted for MMSZ5244ET1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5244ET1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5244ET1?
MMSZ5244ET1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5244ET1 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 MMSZ5244ET1?
For technical support, including MMSZ5244ET1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5244ET1 requirements.
6.How does Aetrix verify that MMSZ5244ET1 is sourced from the original manufacturer or authorized distributors?
All MMSZ5244ET1 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 MMSZ5244ET1 meets industry standards.
7.What is the process for return or replacement of MMSZ5244ET1?
All MMSZ5244ET1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5244ET1, 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 MMSZ5244ET1 part is unused and in its original packaging.
Return procedure for MMSZ5244ET1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5244ET1 Tags
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MM5Z5V1ST1G
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