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onsemi MMBZ5230ELT1G
- Part No.:
- MMBZ5230ELT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5230ELT1G.pdf
- Description:
- DIODE ZENER 4.7V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,613
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Product details
Overview
MMBZ5230ELT1G from onsemi is a 4.7 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C, with 19 Ω dynamic impedance at 20 mA test current and 0.25 μA leakage at 2 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the MMBZ5230ELT1G datasheet, pinout, applications, or equivalent options, this device is selected for space-constrained regulation where stable 4.7 V reference, low leakage, and high ESD tolerance (>16 kV HBM) are required in battery-powered systems.
Technical Context
This Zener diode operates in reverse breakdown mode with nominal Zener voltage of 4.7 V at 20 mA test current (IZT), exhibiting temperature coefficient near zero (±2 mV/°C typical in 4.3–4.9 V range). Its 19 Ω Zener impedance ensures tight regulation under varying load conditions.
The SOT-23 package features Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode; thermal resistance is 556 °C/W on FR-5 board. It meets AEC-Q101 stress requirements when ordered as SZ variant and supports Pb-free reflow soldering up to 260°C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal, 4.46–4.94 V min/max at IZT = 20 mA - defines stable regulation point for reference or clamping circuits |
| Power Dissipation (PD) | 225 mW at TA = 25°C, derated 1.8 mW/°C - sets maximum continuous DC power handling on standard PCB |
| Zener Impedance (ZZT) | 19 Ω max at IZT = 20 mA - determines output voltage variation under load transients |
| Leakage Current (IR) | 0.25 μA max at VR = 2 V - ensures minimal standby current in battery-critical applications |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables robust handling in manual assembly and end-user environments |
| Package | SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm - supports automated placement and high-density routing on compact PCBs |
| Junction Temp Range | −65°C to +150°C - allows operation in extended industrial and automotive ambient conditions |
Pinout & Package
SOT-23 plastic surface-mount package with void-free thermosetting case, corrosion-resistant finish, and cathode polarity band. Maximum soldering temperature: 260°C for 10 seconds. Flammability rating: UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; must be held at voltage ≤ VZ − 0.95 V during forward conduction |
| 2 | No Connection | Internally unconnected; no PCB trace or pad required - eliminates routing conflict and reduces layout complexity |
| 3 | Cathode | Connected to regulated or clamped node; polarity band on package identifies this terminal for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating on FR-5 Board | Enables use in space-limited consumer devices without external heat sinking or derating penalties |
| ESD Robustness >16 kV (HBM) | Reduces need for external ESD protection in handheld interfaces and exposed I/O lines |
| Pb-Free and RoHS Compliant | Meets global environmental compliance mandates without requiring process change in lead-free reflow lines |
| Peak Pulse Power: 225 W (8 × 20 µs) | Provides transient overvoltage suppression capability for EFT and surge events in portable power rails |
| Low Leakage: 0.25 µA @ 2 V | Minimizes quiescent current draw in always-on battery monitoring or wake-up circuits |
Applications
| Battery Voltage Monitoring | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging in wearables or Bluetooth earbuds. IC Role / Device Role / Timing Role: Zener reference for ADC input scaling or comparator threshold setting. Use Value: Stable 4.7 V reference enables accurate 0–4.2 V battery measurement with <±1% full-scale error. |
Use Scenario: Protecting USB data/power lines from accidental 5.5 V adapter overvoltage in OTG accessories. IC Role / Device Role / Timing Role: Shunt clamp limiting VBUS to safe level before damage to USB PHY or LDO. Use Value: 19 Ω ZZT ensures clamping within 50 mV of 4.7 V at 100 mA surge, preventing latch-up in connected ICs. |
| Low-Power Sensor Biasing | Microcontroller Reset Threshold |
|
Use Scenario: Providing stable bias voltage for analog sensor front-ends in IoT node PCBs with tight area budgets. IC Role / Device Role / Timing Role: Precision voltage source for op-amp reference or sensor excitation. Use Value: 4.7 V ±5% tolerance and <2 mV/°C TC maintain sensor linearity across −20°C to +70°C operating range. |
Use Scenario: Generating reliable reset signal for ARM Cortex-M0+ microcontrollers in medical patch monitors. IC Role / Device Role / Timing Role: Voltage monitor triggering POR or brown-out detection circuitry. Use Value: 0.25 µA leakage at 2 V ensures reset remains asserted during deep-sleep modes with nanoamp MCU currents. |
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-C4V7LT1G | Same 4.7 V nominal, but 350 mW rating and 90 Ω ZZT at 5 mA - higher power, lower regulation precision | Preferred where higher surge energy absorption is needed, but less suitable for low-current reference use | Select when board layout allows larger thermal mass and regulation stability at <5 mA is acceptable |
| MMBZ5230BS | Same electrical specs but in SOD-323 package - 1.7 × 1.25 × 0.95 mm vs. SOT-23's 2.9 × 1.3 × 1.0 mm | Better suited for ultra-high-density layouts where footprint area is more constrained than height | Choose when PCB real estate is critical and pick-and-place compatibility with smaller 0201-class feeders exists |
Compared with BZX84-C4V7LT1G and MMBZ5230BS, the MMBZ5230ELT1G delivers optimal balance of regulation accuracy (19 Ω ZZT), low-leakage performance, and SOT-23 manufacturability - making it preferred for mid-volume portable designs requiring repeatable 4.7 V reference behavior.
Availability
MMBZ5230ELT1G is available at Aetrix Electronics and suitable for battery management systems, USB interface protection, low-power sensor nodes, and microcontroller reset circuits requiring stable component supply and consistent parametric performance.
Supply support for MMBZ5230ELT1G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxELT1G series targets space-constrained, low-power regulation needs in portable and wearable electronics - emphasizing small size, high reliability, and robust ESD immunity without sacrificing voltage accuracy.
FAQ
What is the Zener voltage tolerance of MMBZ5230ELT1G?
The MMBZ5230ELT1G has a Zener voltage tolerance of ±5% around its nominal 4.7 V rating, meaning the actual measured VZ falls between 4.46 V and 4.94 V when tested at IZT = 20 mA and TA = 25°C. This tolerance is guaranteed per onsemi's Electrical Characteristics table and applies to all units shipped under this part number.
Is MMBZ5230ELT1G suitable for automotive applications?
The standard MMBZ5230ELT1G is not AEC-Q101 qualified; however, the SZMMBZ5230ELT1G variant - identical in electrical and mechanical specs but with automotive-grade traceability and PPAP documentation - is certified for automotive use. Engineers must specify the SZ prefix for automotive programs requiring qualification evidence.
What is the maximum reverse leakage current for MMBZ5230ELT1G at 2 V?
The maximum reverse leakage current for MMBZ5230ELT1G is 0.25 μA when biased at VR = 2 V and measured at TA = 25°C. This value is specified in the Electrical Characteristics table and reflects worst-case leakage across the production lot, ensuring predictable standby power consumption in battery-operated systems using the MMBZ5230ELT1G.
Does MMBZ5230ELT1G have a connected pin 2?
No, pin 2 of the MMBZ5230ELT1G is internally not connected (NC). The device uses only pins 1 (Anode) and 3 (Cathode) for electrical operation. This NC configuration simplifies PCB layout by eliminating the need for routing or thermal relief on pin 2, and is explicitly confirmed in the datasheet's pinout diagram (Style 8) and marking information.
Can MMBZ5230ELT1G replace MMBZ5230B?
Yes, MMBZ5230ELT1G is a direct replacement for MMBZ5230B in most applications: both share identical Zener voltage (4.7 V), power rating (225 mW), SOT-23 package, and pinout (1-Anode, 2-NC, 3-Cathode). The "E" suffix denotes enhanced reliability screening, and "LT1G" indicates Pb-free tape-and-reel packaging - confirming functional and mechanical compatibility with the legacy MMBZ5230B.
MMBZ5230ELT1G 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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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)
MMBZ5230ELT1G FAQ
1.How can I place an order for MMBZ5230ELT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5230ELT1G 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 MMBZ5230ELT1G reliable?
The price and inventory of MMBZ5230ELT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5230ELT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5230ELT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5230ELT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5230ELT1G?
MMBZ5230ELT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5230ELT1G 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 MMBZ5230ELT1G?
For technical support, including MMBZ5230ELT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5230ELT1G requirements.
6.How does Aetrix verify that MMBZ5230ELT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5230ELT1G 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 MMBZ5230ELT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5230ELT1G?
All MMBZ5230ELT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5230ELT1G, 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 MMBZ5230ELT1G part is unused and in its original packaging.
Return procedure for MMBZ5230ELT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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