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onsemi MMSZ5228BT1
- Part No.:
- MMSZ5228BT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5228BT1.pdf
- Description:
- DIODE ZENER 3.9V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,762
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Product details
Overview
MMSZ5228BT1 from ON Semiconductor is a 500 mW, ±5% tolerance Zener diode in SOD−123 package with nominal reverse breakdown voltage of 3.9 V at 20 mA test current, 23 Ω dynamic impedance at IZT, and 10 µA leakage current at 10 V reverse bias-used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces and microcontroller reset circuits.
For engineers reviewing the MMSZ5228BT1 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 with controlled reverse-biased avalanche breakdown, specified under thermal equilibrium conditions (TL = 30°C ±1°C). Its 3.9 V nominal Zener voltage exhibits a positive temperature coefficient near zero crossing, enabling stable reference generation across −55°C to +150°C junction range.
Designed for surface-mount assembly on FR−4/FR−5 boards, it delivers 500 mW power dissipation at TL = 75°C with 6.7 mW/°C linear derating above that point. Thermal resistance from junction-to-ambient is 340°C/W, confirming suitability for low-power, thermally isolated node regulation without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.9 V @ IZT = 20 mA - defines regulated output level in shunt regulator configurations |
| Zener Voltage Tolerance | ±5% - ensures voltage accuracy within 3.71–4.10 V at 25°C for production consistency |
| Zener Impedance | 23 Ω @ IZT - determines load regulation error under varying current draw |
| Reverse Leakage Current | 10 µA @ VR = 10 V - confirms low standby power loss in always-on monitoring circuits |
| Power Dissipation | 500 mW on FR−5 board @ TL = 75°C - sets maximum continuous power handling before thermal shutdown |
| Junction Temperature Range | −55°C to +150°C - supports operation in automotive engine compartments and industrial control enclosures |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling during automated PCB assembly and field deployment |
Pinout & Package
SOD−123 plastic surface-mount package with cathode indicated by polarity band; dimensions: 2.84 mm × 1.35 mm × 0.94 mm (L × W × H), 0.51 mm lead width, 2.54 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage rail; reverse-bias anode-to-cathode establishes Zener conduction |
| 2 (Non-banded End) | Anode | Typically grounded or tied to lower potential; current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free SOD−123 Package | RoHS-compliant construction with UL 94 V−0 flammability rating and 260°C soldering tolerance |
| AEC−Q101 Qualification | Validated for automotive applications including body electronics and infotainment power rails |
| Thermal Equilibrium Spec | Zener voltage measured at TL = 30°C ±1°C, ensuring repeatable reference performance in thermal-aware designs |
| Low Capacitance | ~30 pF typical at 50% VZ, minimizing signal coupling in high-frequency sensor front-ends |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for LIN bus transceiver biasing and door module microcontroller brown-out detection. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 3.9 V threshold for reset logic and analog comparators. Use Value: Enables reliable reset assertion across −40°C to +125°C ambient with <±5% voltage drift, meeting ISO 16750-4 requirements. | Use Scenario: Clamping and referencing 4–20 mA loop transmitter outputs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Precision Zener clamp limiting op-amp output swing and establishing feedback reference point. Use Value: Maintains 3.9 V reference stability under 20 mA load with 23 Ω dynamic impedance, reducing gain error to <0.5% in 12-bit ADC systems. |
| Medical Wearable Battery Monitor | Consumer IoT Power Management |
Use Scenario: Providing accurate voltage reference for fuel gauge ICs in rechargeable Li-ion battery packs used in portable ECG monitors. IC Role / Device Role / Timing Role: Low-leakage (10 µA @ 10 V) Zener reference stabilizing ADC reference divider network. Use Value: Extends battery life by minimizing quiescent current while maintaining ±1% full-scale accuracy over 500-cycle charge/discharge lifetime. | Use Scenario: Overvoltage protection for USB-C power delivery negotiation ICs in smart home hubs operating from 5 V rail. IC Role / Device Role / Timing Role: Fast-response shunt protector clamping transient spikes above 4.1 V before they damage downstream logic. Use Value: Absorbs 500 mW surge energy without degradation, surviving >10,000 ESD events per IEC 61000-4-2 Level 4. |
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-C3V9 | Same 3.9 V nominal Zener, but SOT-23 package (larger footprint, higher RJA = 375°C/W), 600 mW PD rating | Higher power handling but less suitable for ultra-dense layouts; requires larger PCB area | Select when board layout allows SOT-23 and thermal margin exceeds 500 mW |
| MMSZ4685 | 3.9 V Zener in identical SOD−123 package, but ±5% tolerance and 20 Ω ZZT @ 20 mA (slightly lower impedance) | Direct form-fit replacement with improved regulation stiffness; same thermal profile and footprint | Prefer for new designs requiring tighter regulation error under variable load current |
Compared with MMSZ5228BT1, BZX84-C3V9 offers higher power headroom but sacrifices board density, while MMSZ4685 provides identical packaging with marginally better dynamic impedance-making it ideal for noise-sensitive analog references where layout space is constrained.
Availability
MMSZ5228BT1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, medical wearable power monitoring, and consumer IoT overvoltage protection requiring stable component supply and long-term lifecycle support.
Supply support for MMSZ5228BT1 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MMSZ52xxxT1G series is part of ON Semiconductor's precision Zener voltage regulator product line, engineered for high-reliability, low-power shunt regulation in space-constrained and thermally demanding environments.
FAQ
What is the exact Zener voltage tolerance for MMSZ5228BT1?
The MMSZ5228BT1 has a guaranteed ±5% tolerance on its nominal 3.9 V Zener voltage, meaning the actual measured value falls between 3.71 V and 4.10 V when tested at IZT = 20 mA and thermal equilibrium (TL = 30°C ±1°C). This tolerance is confirmed in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the official ON Semiconductor datasheet for MMSZ5228BT1.
Does MMSZ5228BT1 meet automotive qualification standards?
Yes, MMSZ5228BT1 is AEC−Q101 qualified and PPAP capable, as explicitly stated in the "Features" section of the datasheet. The SZ-prefix variant (SZMMSZ5228BT1G) is designated for automotive use, but the standard MMSZ5228BT1 shares the same die and qualification-making it suitable for automotive body electronics, infotainment, and ADAS subsystems requiring certified reliability.
What is the maximum reverse leakage current for MMSZ5228BT1 at 10 V bias?
The maximum reverse leakage current for MMSZ5228BT1 is 10 µA at VR = 10 V, as specified in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table. This low leakage ensures minimal standby power draw in always-on circuits such as microcontroller reset supervisors and battery voltage monitors where MMSZ5228BT1 serves as a precision reference element.
Can MMSZ5228BT1 be used in place of MMSZ5228BT1G?
Yes-MMSZ5228BT1 and MMSZ5228BT1G are functionally identical except for Pb-free compliance: the "G" suffix denotes RoHS-compliant packaging, while MMSZ5228BT1 (without G) is legacy non-Pb-free. Both share identical electrical specs, SOD−123 package, thermal ratings, and marking (D3). For new designs, MMSZ5228BT1G is preferred; MMSZ5228BT1 remains viable where legacy compliance is acceptable.
What is the thermal resistance from junction-to-lead (RJL) for MMSZ5228BT1?
The thermal resistance from junction-to-lead (RJL) for MMSZ5228BT1 is 150°C/W, as listed in the "MAXIMUM RATINGS" table. This parameter reflects heat transfer efficiency from the silicon die to the PCB copper via the leads, supporting thermal modeling for designs where localized heating must remain below 150°C junction temperature under 500 mW dissipation on FR−5 board.
MMSZ5228BT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 23 Ohms
- Current - Reverse Leakage @ Vr:
- 10 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
MMSZ5228BT1 FAQ
1.How can I place an order for MMSZ5228BT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5228BT1 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 MMSZ5228BT1 reliable?
The price and inventory of MMSZ5228BT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5228BT1 is usually 5 days.
3.What payment methods are accepted for MMSZ5228BT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5228BT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5228BT1?
MMSZ5228BT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5228BT1 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 MMSZ5228BT1?
For technical support, including MMSZ5228BT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5228BT1 requirements.
6.How does Aetrix verify that MMSZ5228BT1 is sourced from the original manufacturer or authorized distributors?
All MMSZ5228BT1 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 MMSZ5228BT1 meets industry standards.
7.What is the process for return or replacement of MMSZ5228BT1?
All MMSZ5228BT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5228BT1, 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 MMSZ5228BT1 part is unused and in its original packaging.
Return procedure for MMSZ5228BT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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