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onsemi MMSZ5226BT3G
- Part No.:
- MMSZ5226BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5226BT3G.pdf
- Description:
- DIODE ZENER 3.3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,478
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Product details
Overview
MMSZ5226BT3G from onsemi is a 3.3 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 28 Ω maximum dynamic impedance at 20 mA test current and 0.25 µA leakage current at 1 V reverse bias - used for precision voltage reference and overvoltage protection in low-power sensor interfaces and microcontroller reset circuits.
For engineers reviewing the MMSZ5226BT3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode/anode terminal mapping, automotive-grade AEC−Q101 qualification status, and direct alternatives for voltage regulation in space-constrained PCBs.
Technical Context
This device operates as a two-terminal silicon Zener diode, maintaining stable reverse breakdown voltage under controlled current conditions. Its 3.3 V nominal Zener voltage is specified with junction in thermal equilibrium at TL = 30°C ±1°C, and exhibits a temperature coefficient of +3.5 mV/°C (typical) across −55°C to +150°C.
The SOD−123 package enables automated placement and reflow soldering per JEDEC standards, with 260°C max soldering temperature for 10 seconds. Thermal resistance is 340°C/W (junction-to-ambient) and 150°C/W (junction-to-lead), supporting reliable operation in thermally dense layouts when mounted on FR−5 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.14–3.47 V @ IZT = 20 mA - defines stable regulation point for low-voltage rail clamping |
| Power Dissipation | 500 mW @ TL = 75°C - sets maximum continuous DC power before thermal derating begins |
| Zener Impedance (ZZT) | 28 Ω max @ IZT = 20 mA - determines output voltage stability under load transients |
| Leakage Current (IR) | 0.25 µA max @ VR = 1 V - ensures minimal standby current in battery-powered systems |
| Forward Voltage (VF) | 0.95 V max @ IF = 10 mA - confirms low-loss conduction in forward-biased ESD clamp configurations |
| ESD Rating | Class 3 (>16 kV HBM) - qualifies for robust handling in uncontrolled assembly environments |
| Junction Temp Range | −55°C to +150°C - supports operation in automotive under-hood and industrial control enclosures |
Pinout & Package
SOD−123 surface-mount plastic package (Case 425, Style 1), void-free transfer-molded thermosetting construction with corrosion-resistant, easily solderable finish. Cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in medium-current regulation without external heatsinking on standard FR−5 PCBs |
| ±5% Zener Tolerance | Provides predictable voltage clamping for cost-sensitive consumer and industrial applications |
| AEC−Q101 Qualified | Validates reliability for automotive body electronics, infotainment power rails, and ADAS sensor supplies |
| Pb−Free Construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 |
| Small Outline Package | 0.94–1.35 mm height × 2.54–2.84 mm length footprint saves >60% board area vs. DO-35 axial leads |
Applications
| Microcontroller Reset Circuit | Low-Power Sensor Reference |
|---|---|
Use Scenario: Provides clean, stable 3.3 V reference to enable precise reset threshold detection in ARM Cortex-M0+ MCUs. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for supervisor IC input or direct MCU VREF connection. Use Value: Ensures reset assertion within ±2% of 3.3 V across temperature, eliminating false resets due to supply ripple or cold-start droop. | Use Scenario: Supplies excitation voltage to analog-output temperature sensors (e.g., TMP36) in portable IoT nodes. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed bias point independent of main supply variation. Use Value: Reduces sensor output error to <0.5% FS by minimizing reference drift - critical for sub-0.1°C measurement accuracy. |
| USB Port Overvoltage Clamp | Industrial PLC Input Protection |
Use Scenario: Limits transient voltage spikes on USB VBUS line during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Fast-response shunt protector clamping peak voltage to ≤3.6 V before damage occurs to downstream USB PHY. Use Value: Survives 15 kV contact ESD per IEC 61000-4-2 without degradation, preserving signal integrity and host controller uptime. | Use Scenario: Protects 24 V digital input channels in programmable logic controllers against field-wiring faults and induced surges. IC Role / Device Role / Timing Role: Primary clamping element in multi-stage TVS/Zener cascade, absorbing initial surge energy before MOV activation. Use Value: Withstands repeated 100 V/1 A transients per IEC 61000-4-4, extending maintenance intervals and reducing spurious fault alarms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V3 | 3.3 V ±1% tolerance, 300 mW rating, SOD-323 package | Higher precision but lower power handling; smaller footprint limits thermal margin | Select when tighter voltage tolerance outweighs power derating needs in compact designs |
| MM3Z3V3T1G | 3.3 V ±5%, 300 mW, SOD-323, same manufacturer family | Lower power rating and higher ZZT (40 Ω) - less stable under dynamic loads | Choose only for legacy compatibility where board layout prohibits SOD−123 rework |
Compared with MMSZ5226BT3G, BZX584C3V3 offers superior voltage accuracy but reduced surge capability, while MM3Z3V3T1G shares the same tolerance and manufacturer but sacrifices 40% power headroom and increases impedance - making MMSZ5226BT3G optimal for thermally demanding, medium-current regulation tasks.
Availability
MMSZ5226BT3G is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, and consumer USB peripheral designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMSZ5226BT3G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
MMSZ5226BT3G belongs to the MMSZ52xxxT1G series of general-purpose Zener regulators designed specifically for high-density, surface-mount voltage reference and protection in cost-sensitive, thermally constrained systems.
FAQ
What is the exact Zener voltage range for MMSZ5226BT3G at 25°C?
The MMSZ5226BT3G has a guaranteed Zener voltage range of 3.14 V to 3.47 V when measured at IZT = 20 mA and ambient temperature of 25°C. This ±5% tolerance is specified with the device junction in thermal equilibrium at TL = 30°C ±1°C, ensuring repeatability across production lots and operating conditions.
Is MMSZ5226BT3G qualified for automotive applications?
Yes, MMSZ5226BT3G is AEC−Q101 qualified and PPAP capable. It meets automotive reliability requirements including temperature cycling, humidity testing, and mechanical shock - making it suitable for non-safety-critical automotive functions such as infotainment power sequencing, lighting control references, and body electronics voltage monitoring.
What is the maximum allowable soldering temperature for MMSZ5226BT3G?
The maximum case temperature for soldering MMSZ5226BT3G is 260°C for up to 10 seconds, per the official onsemi datasheet. This limit applies to both wave and reflow processes and assumes compliance with JEDEC J-STD-020 moisture sensitivity level 1 - no pre-bake required for dry-packed units.
How does thermal derating affect MMSZ5226BT3G's power handling above 75°C?
MMSZ5226BT3G's power dissipation linearly derates at 6.7 mW/°C above TL = 75°C. At 100°C lead temperature, its usable power drops to 332.5 mW (500 mW − (25°C × 6.7 mW/°C)), and at 125°C it falls to 167.5 mW - requiring careful thermal design in enclosed or high-ambient environments.
Can MMSZ5226BT3G be used as a forward-biased diode?
Yes, MMSZ5226BT3G can operate in forward conduction mode with VF ≤ 0.95 V at IF = 10 mA. Its forward characteristics are fully characterized and stable, enabling dual-use as both a Zener regulator and an ESD protection diode in bidirectional clamp circuits - confirmed by onsemi's published forward voltage curves.
MMSZ5226BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 28 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 1 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
MMSZ5226BT3G FAQ
1.How can I place an order for MMSZ5226BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5226BT3G 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 MMSZ5226BT3G reliable?
The price and inventory of MMSZ5226BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5226BT3G is usually 5 days.
3.What payment methods are accepted for MMSZ5226BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5226BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5226BT3G?
MMSZ5226BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5226BT3G 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 MMSZ5226BT3G?
For technical support, including MMSZ5226BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5226BT3G requirements.
6.How does Aetrix verify that MMSZ5226BT3G is sourced from the original manufacturer or authorized distributors?
All MMSZ5226BT3G 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 MMSZ5226BT3G meets industry standards.
7.What is the process for return or replacement of MMSZ5226BT3G?
All MMSZ5226BT3G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5226BT3G, 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 MMSZ5226BT3G part is unused and in its original packaging.
Return procedure for MMSZ5226BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5226BT3G Tags
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MM5Z5V1ST1G
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