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onsemi MMBZ5263ELT1G
- Part No.:
- MMBZ5263ELT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5263ELT1G.pdf
- Description:
- DIODE ZENER 56V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,831
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Product details
Overview
MMBZ5263ELT1G from onsemi is a 56 V ±5% Zener voltage regulator diode in SOT-23 package, rated for 225 mW power dissipation at 25°C, with 1300 Ω maximum dynamic impedance at 2.2 mA test current and 0.1 µA reverse leakage at 43 V, used for precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the MMBZ5263ELT1G 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), peak pulse power capability (225 W), and Pb-free SOT-23 compatibility with automated assembly.
Technical Context
This device operates as a two-terminal voltage reference where reverse-biased breakdown provides stable regulation. Its 56 V nominal Zener voltage falls within the high-voltage segment of the MMBZ52xxELT1G series, exhibiting a positive temperature coefficient above ~5 V, confirmed by typical TC curves in Figure 1.
The SOT-23 package features Pin 1 (Anode), Pin 2 (No Connection), and Pin 3 (Cathode), with polarity indicated by a band on the cathode end. Thermal performance is defined for FR-5 board mounting (RJA = 556 °C/W) and alumina substrate (RJA = 417 °C/W), supporting operation from −65°C to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2–58.8 V @ IZT = 2.2 mA - defines regulated output range under standard test conditions |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5 - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance (ZZT) | 1300 Ω max @ IZT = 2.2 mA - indicates voltage regulation stability under small-signal AC variation |
| Reverse Leakage (IR) | 0.1 µA max @ VR = 43 V - ensures minimal standby current in clamping or reference configurations |
| ESD Rating | Class 3 (>16 kV) per HBM - enables robust handling in manual assembly and portable end-equipment environments |
| Peak Pulse Power | 225 W @ 8 × 20 µs waveform - supports transient surge suppression without failure |
| Junction Temp Range | −65°C to +150°C - allows deployment in automotive under-hood and industrial control applications |
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; polarity marked by cathode band; Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; required for proper Zener conduction path |
| 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad connection permitted |
| 3 | Cathode | Connected to higher-potential node; polarity band on package aligns with this terminal for visual orientation |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW FR-5 power rating | Enables compact voltage regulation without heatsinking in handheld and wearable PCB layouts |
| 1300 Ω Zener impedance at 2.2 mA | Delivers stable reference voltage under light-load conditions typical in sensor biasing and ADC reference circuits |
| EIA-977-compliant marking | Supports automated optical inspection (AOI) and traceability via standardized SOT-23 device code "BJ8" |
| Class 3 HBM ESD immunity | Eliminates need for external ESD protection in battery-powered USB peripherals and IoT edge nodes |
| Pb-free and RoHS-compliant | Meets global environmental compliance requirements for consumer, medical, and industrial end products |
Applications
| Portable Power Management | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Voltage clamping in Li-ion battery charge management IC input rails. IC Role / Device Role / Timing Role: Zener clamp protecting IC enable pin from overvoltage during hot-plug events. Use Value: Prevents latch-up or damage to 56 V-rated supervisor ICs using only 1.3 mm² board area. |
Use Scenario: Precision reference for 24 V industrial current-loop transmitters. IC Role / Device Role / Timing Role: Stable 56 V Zener source for op-amp-based loop voltage calibration. Use Value: Maintains <±1% output accuracy across −40°C to +85°C ambient due to known TC behavior. |
| Automotive Body Control Module | Medical Wearable Monitoring |
|
Use Scenario: Overvoltage protection on LIN bus transceiver supply lines. IC Role / Device Role / Timing Role: Transient suppressor absorbing load-dump spikes up to 225 W (8 × 20 µs). Use Value: Meets AEC-Q101 stress requirements without adding TVS diodes or layout complexity. |
Use Scenario: Low-power voltage reference in disposable ECG patch front-end. IC Role / Device Role / Timing Role: Bias generator for instrumentation amplifier with sub-µA quiescent current. Use Value: Enables >100-hour battery life using 0.1 µA leakage at 43 V reverse bias. |
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-C56LT1G | Same 56 V nominal Zener, but 300 mW rating and 60 Ω ZZT @ 5 mA - lower impedance, higher power, larger RJA (450 °C/W) | Preferred where tighter regulation is needed at higher currents; less suitable for ultra-low-leakage designs | Select when circuit requires <100 Ω dynamic impedance and can accommodate 0.35 mm taller profile |
| SZMMBZ5263ELT1G | Identical electrical specs, but AEC-Q101 qualified and PPAP-capable; same SOT-23 package and pinout | Required for automotive production programs needing certified reliability and change control documentation | Choose for Tier-1 automotive BOMs where qualification evidence and process traceability are mandatory |
Compared with BZX84-C56LT1G and SZMMBZ5263ELT1G, the MMBZ5263ELT1G offers optimal balance of low-profile packaging, industry-standard ESD robustness, and cost-effective qualification for non-automotive industrial and portable designs.
Availability
MMBZ5263ELT1G is available at Aetrix Electronics and suitable for portable power management, industrial sensor interface, automotive body control module, and medical wearable monitoring requiring stable component supply and full traceability.
Supply support for MMBZ5263ELT1G 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.
The MMBZ52xxELT1G series was designed to deliver reliable, space-saving Zener regulation for high-density portable electronics and ruggedized industrial systems where thermal and ESD constraints dominate layout decisions.
FAQ
What is the exact Zener voltage tolerance for MMBZ5263ELT1G?
The MMBZ5263ELT1G has a specified Zener voltage range of 53.2 V (min) to 58.8 V (max) at test current IZT = 2.2 mA and TA = 25°C, corresponding to a ±5% tolerance around the nominal 56 V value. This tolerance remains valid across its operating temperature range and is verified per onsemi's production test flow.
Does MMBZ5263ELT1G have a functional third pin?
No, MMBZ5263ELT1G is a two-terminal Zener diode with Pin 2 internally unconnected (NC). The SOT-23 pinout is strictly Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode, as confirmed in the Electrical Characteristics table and mechanical outline Style 8. PCB layout must leave Pin 2 unconnected.
Can MMBZ5263ELT1G be used for transient voltage suppression?
Yes, MMBZ5263ELT1G supports transient suppression with a rated peak pulse power of 225 W for an 8 × 20 µs waveform, as specified in the Maximum Ratings table. It is commonly deployed for load-dump and ESD clamping in 24 V and 48 V systems where fast response and compact size are critical.
What is the thermal resistance of MMBZ5263ELT1G on standard PCB?
The junction-to-ambient thermal resistance (RJA) of MMBZ5263ELT1G is 556 °C/W when mounted on FR-5 board per the datasheet's Note 2. This value assumes standard 1.0 × 0.75 × 0.62 inch board dimensions and governs thermal derating above 25°C ambient temperature.
Is MMBZ5263ELT1G suitable for automotive applications?
The base MMBZ5263ELT1G is not AEC-Q101 qualified; however, its automotive-grade variant SZMMBZ5263ELT1G shares identical electrical and mechanical specifications and is fully qualified for automotive use with PPAP documentation support. For production automotive designs, SZMMBZ5263ELT1G is the appropriate choice.
MMBZ5263ELT1G 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):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 43 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)
MMBZ5263ELT1G FAQ
1.How can I place an order for MMBZ5263ELT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5263ELT1G 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 MMBZ5263ELT1G reliable?
The price and inventory of MMBZ5263ELT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5263ELT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5263ELT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5263ELT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5263ELT1G?
MMBZ5263ELT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5263ELT1G 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 MMBZ5263ELT1G?
For technical support, including MMBZ5263ELT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5263ELT1G requirements.
6.How does Aetrix verify that MMBZ5263ELT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5263ELT1G 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 MMBZ5263ELT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5263ELT1G?
All MMBZ5263ELT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5263ELT1G, 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 MMBZ5263ELT1G part is unused and in its original packaging.
Return procedure for MMBZ5263ELT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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