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onsemi MMSZ5244ET1G
- Part No.:
- MMSZ5244ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5244ET1G.pdf
- Description:
- DIODE ZENER 14V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:8,650
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Product details
Overview
MMSZ5244ET1G 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, 15 Ω dynamic impedance at IZT, and 0.1 µA leakage at 10 V reverse bias - used for precision voltage reference and overvoltage clamping in low-power analog circuits.
For engineers reviewing the MMSZ5244ET1G 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 (>16 kV HBM), and SOD-123 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal silicon Zener diode optimized for stable reverse-bias regulation. It achieves nominal 14 V breakdown at 9.0 mA (IZT) with ±5% tolerance, exhibits low dynamic impedance (15 Ω) under regulation, and maintains leakage below 0.1 µA at VR = 10 V - enabling accurate voltage referencing in sensor signal conditioning and power rail supervision.
Thermal performance is defined by RJL = 150 °C/W (junction-to-lead), allowing reliable operation up to +150 °C junction temperature. Its SOD-123 package supports automated placement and reflow soldering per JEDEC J-STD-020, with peak reflow temperature of 260 °C for 10 seconds.
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% across production lots and temperature range. |
| Power Dissipation (PD) | 500 mW @ TL = 75 °C - defines maximum continuous DC power handling on standard FR-5 board before thermal derating applies. |
| Zener Impedance (ZZT) | 15 Ω max @ IZT = 9.0 mA - determines output voltage stability under load variation; lower value improves regulation accuracy. |
| Leakage Current (IR) | 0.1 µA max @ VR = 10 V - critical for low-power standby circuits where quiescent current must be minimized. |
| ESD Rating | Class 3 (>16 kV) per HBM - enables safe handling and integration into unshielded consumer and industrial PCB assemblies without additional protection. |
| Junction Temp Range | −55 °C to +150 °C - supports operation in automotive under-hood, industrial control, and outdoor embedded environments. |
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; lead-free (Pb-Free) compliant; UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs; polarity band must align with PCB silkscreen. |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation; requires proper thermal relief for solder joint reliability. |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating on FR-5 Board | Enables use in space-constrained, medium-current applications without external heatsinking - suitable for 3.3 V/5 V rail clamping and ADC reference stabilization. |
| Low Dynamic Impedance (15 Ω) | Minimizes output voltage deviation under varying load currents - critical for maintaining accuracy in precision analog front-ends. |
| ESD Robustness (>16 kV HBM) | Eliminates need for discrete ESD protection in many end-equipment designs - reduces BOM count and layout complexity. |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements and supports lead-free reflow profiles without compromising reliability. |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for bridge-based pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Zener diode providing precise 14 V shunt reference for op-amp excitation and ADC input scaling. Use Value: Tight ±5% VZ tolerance and low 15 Ω ZZT ensure <±0.5% full-scale error in 12-bit measurement systems across −40 °C to +85 °C. | Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events in portable medical devices. IC Role / Device Role / Timing Role: Shunt protection element diverting >100 V transients away from USB controller ICs. Use Value: 225 W nonrepetitive surge capability (8 × 20 µs) and 0.1 µA leakage at 10 V prevent false triggering while preserving standby battery life. |
| Automotive Body Control Module (BCM) | IoT Node Power Rail Supervision |
Use Scenario: Regulating auxiliary 14 V supply for LIN transceivers and LED drivers in vehicle door modules. IC Role / Device Role / Timing Role: Voltage reference and overvoltage clamp in 12 V battery-supplied subsystems. Use Value: AEC-Q101 qualification and −55 °C to +150 °C operating range ensure functional safety compliance without derating in under-dash environments. | Use Scenario: Monitoring 3.3 V LDO output in battery-powered smart meter nodes using microcontroller ADC. IC Role / Device Role / Timing Role: Precision shunt reference for ADC internal calibration and brown-out detection threshold. Use Value: Sub-µA leakage and stable 14 V reference enable accurate 0.1% rail monitoring over 10-year deployment with minimal firmware compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C15 | 15 V nominal, ±5%, 300 mW rating, SOD-323 package | Lower power rating and smaller package limit thermal margin in sustained 10 mA operation | Select when board space is constrained and average power <300 mW; verify thermal relief design for SOD-323 pad geometry. |
| MMBZ5244ET1G | Same 14 V spec, but in SOT-23 package with 3-pin footprint and anode/cathode/emitter configuration | SOT-23 requires different land pattern and introduces unused third terminal; not drop-in compatible | Choose only if existing SOT-23 layout exists and pin 3 is left unconnected; otherwise avoid due to mechanical incompatibility. |
Compared with BZX584-C15 and MMBZ5244ET1G, the MMSZ5244ET1G offers higher power headroom (500 mW vs. 300 mW), superior thermal performance (RJL = 150 °C/W), and direct SOD-123 footprint compatibility - making it preferred for industrial and automotive applications requiring long-term reliability under thermal stress.
Availability
MMSZ5244ET1G is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB power protection circuits, automotive body control modules, and IoT node power supervision requiring stable component supply and full traceability.
Supply support for MMSZ5244ET1G 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 delivering energy-efficient, intelligent power and sensing 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 applications requiring tight voltage tolerance, robust ESD immunity, and reliable surface-mount assembly in SOD-123 format.
FAQ
What is the nominal Zener voltage and tolerance of the MMSZ5244ET1G?
The MMSZ5244ET1G has a nominal Zener voltage of 14 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 13.3 V and 14.7 V when tested at IZT = 9.0 mA and TL = 30 °C. This tolerance is guaranteed across manufacturing lots and remains valid over the full operating temperature range of −55 °C to +150 °C, as confirmed in the official onsemi datasheet revision 10.
What is the maximum power dissipation rating for MMSZ5244ET1G on a standard PCB?
The MMSZ5244ET1G is rated for 500 mW total power dissipation on FR-5 board at lead temperature (TL) = 75 °C, with linear derating of 6.7 mW/°C above that temperature. This rating assumes use of the minimum recommended footprint per onsemi's layout guidelines and reflects real-world thermal performance under typical reflow-soldered conditions - not theoretical junction-limited values.
Does MMSZ5244ET1G meet automotive qualification standards?
Yes, the SZ-prefix variant SZMMSZ5244ET1G is AEC-Q101 qualified and PPAP capable, but the standard MMSZ5244ET1G is not automotive-qualified. While both share identical electrical specs and SOD-123 packaging, only the SZ version undergoes extended stress testing and process controls required for automotive applications. For non-automotive industrial use, MMSZ5244ET1G remains fully suitable and widely deployed.
What is the Zener impedance of MMSZ5244ET1G and why does it matter?
The MMSZ5244ET1G has a maximum Zener impedance (ZZT) of 15 Ω at IZT = 9.0 mA. This parameter quantifies how much the output voltage changes with load current - lower ZZT means better regulation stability. In practice, this allows the MMSZ5244ET1G to maintain voltage accuracy within ±0.15 V for ±10 mA load swings, making it suitable for precision analog references where ripple rejection matters.
How is the polarity marked on the MMSZ5244ET1G SOD-123 package?
The MMSZ5244ET1G uses a cathode band (dark stripe) on the SOD-123 body to indicate Pin 1 (cathode); Pin 2 (anode) is the unmarked end. The marking "CC6" appears adjacent to the band per onsemi's device marking diagram. During PCB layout, the silkscreen polarity indicator must align precisely with this band to ensure correct reverse-bias orientation - misalignment will cause open-circuit behavior instead of regulation.
MMSZ5244ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- MMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
MMSZ5244ET1G FAQ
1.How can I place an order for MMSZ5244ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5244ET1G 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 MMSZ5244ET1G reliable?
The price and inventory of MMSZ5244ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5244ET1G is usually 5 days.
3.What payment methods are accepted for MMSZ5244ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5244ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5244ET1G?
MMSZ5244ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5244ET1G 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 MMSZ5244ET1G?
For technical support, including MMSZ5244ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5244ET1G requirements.
6.How does Aetrix verify that MMSZ5244ET1G is sourced from the original manufacturer or authorized distributors?
All MMSZ5244ET1G 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 MMSZ5244ET1G meets industry standards.
7.What is the process for return or replacement of MMSZ5244ET1G?
All MMSZ5244ET1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5244ET1G, 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 MMSZ5244ET1G part is unused and in its original packaging.
Return procedure for MMSZ5244ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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