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onsemi MMBZ5228BLT1H
- Part No.:
- MMBZ5228BLT1H
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
MMBZ5228BLT1H.pdf
- Description:
- DIODE ZENER 3.9V .225W SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:603,000
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Product details
Overview
MMBZ5228BLT1H from onsemi is a 3.9 V ±5% Zener voltage regulator diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 23 Ω maximum Zener impedance at 20 mA test current and 10 µA reverse leakage at 1 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the MMBZ5228BLT1H datasheet, pinout, applications, or equivalent options, key selection criteria include its 3.9 V nominal Zener voltage, 225 mW surface-mount power rating, SOT-23 footprint compatibility, Class 3 ESD robustness (>16 kV HBM), and automotive-grade AEC-Q101 qualification status.
Technical Context
This device operates as a two-terminal silicon Zener diode, conducting in reverse breakdown to maintain stable voltage across its cathode-anode terminals when biased above its specified VZ. Its thermal resistance of 556°C/W (FR-5) and junction temperature range of −65°C to +150°C support reliable operation in compact, thermally constrained PCB layouts.
The MMBZ5228BLT1H features a no-connect (NC) terminal (Pin 2), enabling simplified layout routing and reducing parasitic coupling. Its 0.25 µA leakage at VR = 1 V and 1900 Ω dynamic impedance at IZK = 0.25 mA ensure low standby current draw and predictable regulation under light-load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.70–4.10 V at 20 mA - defines precise clamping/reference point for 3.3 V rail protection or biasing |
| Power Dissipation (PD) | 225 mW on FR-5 board - limits continuous current to ~57 mA at 3.9 V without derating |
| Zener Impedance (ZZT) | 23 Ω max at IZT = 20 mA - ensures <115 mV output variation for ±2.5 mA load shifts |
| Reverse Leakage (IR) | 10 µA max at VR = 1 V - enables ultra-low quiescent current in battery-backed circuits |
| ESD Rating | Class 3 (>16 kV HBM) - eliminates need for external ESD protection in handheld interfaces |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive engine compartments and industrial enclosures |
Pinout & Package
SOT-23 (Case 318, Style 8) surface-mount plastic package with void-free thermosetting mold compound, corrosion-resistant finish, and UL 94 V-0 flammability rating. Cathode indicated by polarity band; maximum solder temperature 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward conduction terminal / Zener cathode reference | Connected to ground or lower-potential node during reverse-bias regulation |
| 2 (NC) | No internal connection | Unused pad; may be left floating or tied to ground for mechanical stability-no electrical function |
| 3 (Cathode) | Zener breakdown terminal / voltage reference output | Connected to regulated node (e.g., microcontroller reset line or ADC reference) |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free, RoHS Compliant | Meets global environmental compliance mandates without requiring process requalification |
| AEC-Q101 Qualified | Validated for automotive applications including infotainment power rails and sensor bias networks |
| 225 mW FR-5 Power Rating | Enables direct replacement of larger DO-35 or SOD-123 devices in space-constrained layouts |
| 16 kV HBM ESD Robustness | Eliminates need for discrete TVS diodes in USB, button, or I/O line protection schemes |
| Small SOT-23 Footprint | Reduces PCB area by >60% vs. legacy axial Zeners while maintaining thermal performance |
Applications
| Smartphone Power Management | Automotive Cabin Sensors |
|---|---|
|
Use Scenario: Clamping 3.3 V I/O lines against ESD transients during hot-plug events. IC Role / Device Role / Timing Role: Voltage clamp protecting PMIC GPIOs and baseband processor interfaces. Use Value: Prevents latch-up or gate oxide damage using only 1 mm² PCB area and zero external components. |
Use Scenario: Providing stable 3.9 V reference for analog signal conditioning in cabin temperature sensors. IC Role / Device Role / Timing Role: Precision shunt reference for op-amp biasing in low-drift sensor front-ends. Use Value: Maintains <±1% reference accuracy over −40°C to +125°C without trimming or calibration. |
| Industrial IoT Node Reset Circuit | Wearable Health Monitor Battery Monitoring |
|
Use Scenario: Generating clean reset signal for ARM Cortex-M microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Zener-based reset supervisor with hysteresis via RC network. Use Value: Delivers deterministic 2.7–3.0 V reset threshold with <5 µs response time and no external IC required. |
Use Scenario: Scaling lithium-ion cell voltage for ADC input in compact fitness trackers. IC Role / Device Role / Timing Role: Passive voltage divider reference element with minimal self-heating error. Use Value: Enables ±0.5% battery SOC estimation accuracy with <0.1 µA quiescent current draw. |
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 350 mW rating and higher ZZT (60 Ω) | Higher power handling suits 5 V rail clamping; less stable under microamp loads | Select for cost-sensitive consumer designs where tighter regulation isn't critical |
| SZMMBZ5228BLT1G | Identical electrical specs; AEC-Q101 certified with SZ prefix and PPAP documentation | Required for Tier-1 automotive BOMs needing full traceability and change control | Select when automotive qualification and manufacturing site control are mandatory |
Compared with BZX84-C3V9, MMBZ5228BLT1H offers superior low-current regulation stability and smaller footprint; compared with SZMMBZ5228BLT1G, it lacks formal PPAP support but shares identical silicon and packaging-ideal for pre-qualification prototyping or non-automotive industrial use.
Availability
MMBZ5228BLT1H is available at Aetrix Electronics and suitable for smartphone power management, automotive cabin sensors, industrial IoT node reset circuits, and wearable health monitor battery monitoring requiring stable component supply across high-mix production runs.
Supply support for MMBZ5228BLT1H 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 specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, medical, and IoT markets.
The MMBZ52xxBLT1G series was designed for space-constrained, high-reliability voltage regulation in portable and automotive electronics-emphasizing low-profile packaging, AEC-Q101 compliance, and robust ESD immunity.
FAQ
What is the exact Zener voltage tolerance for MMBZ5228BLT1H?
The MMBZ5228BLT1H has a guaranteed Zener voltage range of 3.70 V to 4.10 V at 20 mA test current (IZT), corresponding to a ±5% tolerance around the nominal 3.9 V value. This tolerance is verified per onsemi's production testing and applies across the full operating temperature range of −65°C to +150°C.
Does MMBZ5228BLT1H have a functional Pin 2 connection?
No-Pin 2 of the MMBZ5228BLT1H is internally unconnected (NC). The device functions identically with Pin 2 left floating or grounded for mechanical reinforcement. This NC pin simplifies PCB layout by eliminating routing conflicts and reduces parasitic capacitance in high-frequency signal paths.
Can MMBZ5228BLT1H replace older MMBZ5228BLT1 devices?
Yes-MMBZ5228BLT1H is a direct revision upgrade of MMBZ5228BLT1, sharing identical electrical specifications, SOT-23 package dimensions, and pinout. The "H" suffix denotes updated packaging and RoHS compliance; no design changes or layout modifications are required for drop-in replacement.
What is the maximum continuous reverse current MMBZ5228BLT1H can handle?
At 25°C ambient on an FR-5 board, MMBZ5228BLT1H supports up to 57.7 mA continuous reverse current (calculated as 225 mW ÷ 3.9 V) before reaching its 225 mW power limit. Derating is required above 25°C at 1.8 mW/°C, reducing usable current linearly with rising temperature.
Is MMBZ5228BLT1H suitable for automotive applications?
MMBZ5228BLT1H is not AEC-Q101 qualified; however, its sister part SZMMBZ5228BLT1G is fully qualified and pin-compatible. For automotive designs requiring formal qualification, SZMMBZ5228BLT1G must be used-MMBZ5228BLT1H remains appropriate for non-safety-critical industrial or consumer applications demanding identical electrical behavior.
MMBZ5228BLT1H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMBZ5228BLT1H FAQ
1.How can I place an order for MMBZ5228BLT1H through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5228BLT1H 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 MMBZ5228BLT1H reliable?
The price and inventory of MMBZ5228BLT1H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5228BLT1H is usually 5 days.
3.What payment methods are accepted for MMBZ5228BLT1H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5228BLT1H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5228BLT1H?
MMBZ5228BLT1H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5228BLT1H 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 MMBZ5228BLT1H?
For technical support, including MMBZ5228BLT1H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5228BLT1H requirements.
6.How does Aetrix verify that MMBZ5228BLT1H is sourced from the original manufacturer or authorized distributors?
All MMBZ5228BLT1H 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 MMBZ5228BLT1H meets industry standards.
7.What is the process for return or replacement of MMBZ5228BLT1H?
All MMBZ5228BLT1H units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5228BLT1H, 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 MMBZ5228BLT1H part is unused and in its original packaging.
Return procedure for MMBZ5228BLT1H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5228BLT1H Tags
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