My Inquiry
My Account
onsemi MMBZ5228ELT1G
- Part No.:
- MMBZ5228ELT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5228ELT1G.pdf
- Description:
- DIODE ZENER 3.9V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,047
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMBZ5228ELT1G from onsemi is a 3.9 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C, with 23 Ω dynamic impedance at 20 mA test current and 0.25 μA leakage at 1 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the MMBZ5228ELT1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, thermal resistance (556 °C/W on FR-5), ESD robustness (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse breakdown mode to maintain stable voltage across its cathode-anode terminals under varying load or supply conditions. Its 3.9 V nominal Zener voltage exhibits low temperature coefficient (≈+2 mV/°C near this range) and is specified with tight ±5% tolerance at IZT = 20 mA.
The SOT-23 package features pin 1 (anode), pin 2 (no connection), and pin 3 (cathode), enabling unidirectional clamping or regulation without parasitic conduction paths. Thermal performance is defined for FR-5 board (225 mW) and alumina substrate (300 mW), supporting design margining for ambient temperature derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.70–4.10 V @ IZT = 20 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5 board - sets maximum continuous DC power handling before thermal shutdown |
| Zener Impedance (ZZT) | 23 Ω @ IZT = 20 mA - determines voltage regulation stability under dynamic load changes |
| Leakage Current (IR) | 0.25 μA @ VR = 1 V - ensures minimal standby current draw in battery-powered circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - enables direct handling and assembly without special ESD controls |
| Junction Temperature Range | −65°C to +150°C - supports operation in extended industrial and automotive environments |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish and UL 94 V-0 flammability rating. Cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries forward current during transient overvoltage events |
| 2 | No Connection | Internally isolated terminal - must remain unconnected on PCB to avoid unintended coupling or thermal stress |
| 3 | Cathode | Connected to higher-potential node; establishes regulated reference voltage at cathode relative to anode ground |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free and RoHS-compliant packaging | Enables compliance with global environmental regulations without solderability compromise |
| 225 W peak pulse power (8 × 20 μs) | Supports transient surge suppression in ESD-prone interfaces like USB or button inputs |
| Small SOT-23 footprint | Reduces PCB area by >60% vs. DO-35, enabling integration into space-constrained handheld devices |
| Low leakage at low reverse bias | Minimizes quiescent current drain in always-on sensor nodes powered by coin cells |
Applications
| Smartphone Power Rail Clamp | IoT Sensor Reference Voltage |
|---|---|
Use Scenario: Clamping 3.3 V LDO output against ESD transients during USB insertion or button press. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy to ground. Use Value: Prevents latch-up or damage to downstream PMICs using only 3.9 V regulation with <23 Ω dynamic impedance. |
Use Scenario: Providing stable 3.9 V reference for 12-bit ADC in battery-powered environmental sensor node. IC Role / Device Role / Timing Role: Precision voltage reference source with <±5% tolerance and low tempco. Use Value: Enables <0.5% measurement accuracy over −20°C to +70°C without calibration. |
| Wearable Battery Monitor | Industrial Control Signal Conditioning |
Use Scenario: Monitoring Li-ion cell voltage via resistive divider with Zener-clamped input to MCU ADC. IC Role / Device Role / Timing Role: Overvoltage protection element limiting divider output to safe 3.9 V level. Use Value: Eliminates need for external op-amp buffer while maintaining <0.25 μA leakage at 1 V bias. |
Use Scenario: Level-shifting and noise filtering of 4–20 mA loop signals entering PLC analog input modules. IC Role / Device Role / Timing Role: Low-impedance shunt regulator stabilizing bias voltage for current-to-voltage conversion. Use Value: Maintains signal integrity with 225 mW continuous dissipation capability across wide temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9 | Same 3.9 V nominal, but 350 mW PD rating and higher ZZT (60 Ω); SOT-23 package with identical pinout | Higher power handling suits higher-current clamping; less precise regulation due to higher impedance | Select when surge energy exceeds 225 mW but Zener voltage tolerance and leakage are secondary |
| MMBZ5228BS | Same electrical specs, but in SOD-123 package (larger footprint, 350 mW rating, different thermal resistance) | Preferred where manual rework or higher thermal mass is required; incompatible with fine-pitch SOT-23 pick-and-place | Choose for prototyping or low-volume production needing easier soldering and higher reliability margin |
Compared with MMBZ5228ELT1G, BZX84-C3V9 offers greater surge capacity but looser regulation, while MMBZ5228BS trades miniaturization for thermal robustness-making MMBZ5228ELT1G optimal for high-density, automated manufacturing of portable electronics.
Availability
MMBZ5228ELT1G is available at Aetrix Electronics and suitable for smartphone power rail clamping, IoT sensor reference voltage generation, wearable battery monitoring, and industrial control signal conditioning requiring stable component supply and full traceability.
Supply support for MMBZ5228ELT1G 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 management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMBZ52xxELT1G series belongs to onsemi's precision Zener voltage regulator product line, engineered specifically for space-constrained, low-power applications demanding high ESD immunity and tight voltage tolerance in portable and battery-operated systems.
FAQ
What is the exact Zener voltage tolerance for MMBZ5228ELT1G?
The MMBZ5228ELT1G has a guaranteed Zener voltage range of 3.70 V to 4.10 V at 20 mA test current, corresponding to a ±5% tolerance around the nominal 3.9 V value. This specification is verified per onsemi's datasheet Rev. 9 (August 2024) and applies under TA = 25°C with pulse testing to minimize self-heating effects. The MMBZ5228ELT1G maintains this tolerance across its qualified operating temperature range.
Does MMBZ5228ELT1G have a functional pin 2 connection?
No - pin 2 of the MMBZ5228ELT1G is internally not connected (NC), as confirmed in the Electrical Characteristics table and Mechanical Case Outline documentation. The device uses only pins 1 (anode) and 3 (cathode) for circuit operation. Leaving pin 2 unconnected on the PCB avoids unintended thermal or electrical coupling and aligns with onsemi's recommended layout practices for the SOT-23 package.
What is the maximum continuous power dissipation for MMBZ5228ELT1G on a standard PCB?
The MMBZ5228ELT1G is rated for 225 mW total power dissipation on FR-5 board at 25°C ambient temperature, with linear derating of 1.8 mW/°C above that point. This value assumes standard JEDEC-defined copper land patterns and reflects real-world thermal performance in typical high-density consumer PCBs - not theoretical junction limits. The MMBZ5228ELT1G's 556 °C/W RJA confirms this rating.
Can MMBZ5228ELT1G be used for ESD protection in USB Type-C interfaces?
Yes - the MMBZ5228ELT1G provides Class 3 HBM ESD protection (>16 kV), and its 225 W peak pulse power (8 × 20 μs) meets IEC 61000-4-2 Level 4 requirements for system-level ESD immunity. When placed between VBUS and ground with appropriate series impedance, the MMBZ5228ELT1G clamps transients to ≤4.1 V, protecting downstream USB controllers. Its low capacitance (<5 pF at 0 V bias) avoids signal integrity issues on high-speed lines.
Is MMBZ5228ELT1G suitable for automotive applications?
The standard MMBZ5228ELT1G is not AEC-Q101 qualified; however, the SZMMBZ5228ELT1G variant - sharing identical electrical specs and SOT-23 packaging - is explicitly qualified for automotive use per AEC-Q101 and PPAP capable. For non-automotive designs, the MMBZ5228ELT1G delivers identical Zener performance with Pb-free compliance and industrial-grade reliability. Always verify qualification status via part marking and ordering code.
MMBZ5228ELT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 225 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:
- SOT-23-3 (TO-236)
MMBZ5228ELT1G FAQ
1.How can I place an order for MMBZ5228ELT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5228ELT1G 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 MMBZ5228ELT1G reliable?
The price and inventory of MMBZ5228ELT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5228ELT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5228ELT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5228ELT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5228ELT1G?
MMBZ5228ELT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5228ELT1G 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 MMBZ5228ELT1G?
For technical support, including MMBZ5228ELT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5228ELT1G requirements.
6.How does Aetrix verify that MMBZ5228ELT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5228ELT1G 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 MMBZ5228ELT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5228ELT1G?
All MMBZ5228ELT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5228ELT1G, 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 MMBZ5228ELT1G part is unused and in its original packaging.
Return procedure for MMBZ5228ELT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5228ELT1G Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
