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onsemi MMBZ5260BLT1G
- Part No.:
- MMBZ5260BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5260BLT1G.pdf
- Description:
- DIODE ZENER 43V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:181,703
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Product details
Overview
MMBZ5260BLT1G from onsemi is a 43 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 93 Ω dynamic impedance at 3 mA test current and 0.1 μA leakage at 33 V reverse bias. It provides precision voltage regulation in space-constrained portable electronics.
For engineers reviewing the MMBZ5260BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (556 °C/W), ESD rating (>16 kV HBM), cathode-anode polarity marking, and compatibility with automated SMT assembly.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at its specified Zener level. Its 43 V nominal Zener voltage exhibits a positive temperature coefficient above ~5 V, stabilizing regulation across −65°C to +150°C junction temperature range.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode) and supports surface-mount reflow up to 260°C for 10 seconds. It delivers 225 mW power handling on standard FR-5 PCBs and 300 mW on alumina substrates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 40.85 V min / 43 V nom / 45.15 V max @ IZT = 3 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 225 mW on FR-5 board @ 25°C - maximum continuous power before thermal derating begins |
| Zener Impedance (ZZT) | 900 Ω max @ IZT = 3 mA - indicates voltage stability under small-signal AC variations |
| Leakage Current (IR) | 0.1 μA max @ VR = 33 V - ensures minimal standby current in overvoltage protection circuits |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables robust handling in manual assembly and field environments |
| Junction Temperature Range | −65°C to +150°C - supports operation in automotive under-hood and industrial ambient conditions |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body size, Pb-free, RoHS-compliant, with cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Forward-biased terminal; connects to lower-potential node in regulation path |
| Pin 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| Pin 3 | Cathode | Reverse-biased terminal; connects to regulated voltage rail or protection node |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating on FR-5 Board | Enables compact voltage clamping without heatsinking in handheld PCB layouts |
| ESD Robustness >16 kV HBM | Eliminates need for external ESD protection in consumer interface circuits |
| Pb-Free, Halogen-Free, RoHS-Compliant | Meets global environmental compliance requirements for commercial and industrial shipments |
| Optimized for Automated SMT Assembly | Standard SOT-23 footprint and marking support high-yield pick-and-place and AOI inspection |
Applications
| USB Port Overvoltage Protection | Smartphone Battery Monitoring |
|---|---|
|
Use Scenario: Clamps transient surges on USB VBUS line during hot-plug or ESD events. IC Role / Device Role / Timing Role: Two-terminal shunt regulator acting as primary overvoltage clamp before downstream PMIC input. Use Value: Limits voltage to ≤45.15 V during transients, protecting 5 V–20 V USB PD interface ICs without adding series resistance. |
Use Scenario: Provides stable reference for ADC-based battery voltage measurement in Li-ion powered devices. IC Role / Device Role / Timing Role: Precision Zener reference source feeding voltage divider network into analog front-end. Use Value: Delivers ±5% voltage accuracy over temperature, enabling <1% battery SOC estimation error in portable systems. |
| Industrial Sensor Signal Conditioning | IoT Node Power Rail Stabilization |
|
Use Scenario: Regulates excitation voltage for bridge-type pressure sensors in 24 V industrial modules. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant bias voltage despite supply ripple or load variation. Use Value: Holds sensor excitation within ±0.5% using 43 V Zener with low 900 Ω dynamic impedance, improving measurement repeatability. |
Use Scenario: Stabilizes 3.3 V LDO input rail against 12 V supply fluctuations in battery-backed edge nodes. IC Role / Device Role / Timing Role: Pre-regulator absorbing excess voltage drop before low-noise linear regulator stage. Use Value: Dissipates up to 225 mW while holding upstream rail steady, reducing thermal stress on downstream LDO and extending battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C43LT1G | Same 43 V nominal Zener, but 350 mW rating on FR-4 and higher 1000 Ω ZZT @ 5 mA | Higher power handling suits higher-current clamping; less precise regulation due to higher impedance | Select when >225 mW dissipation is needed and tighter voltage stability is secondary |
| SZMMBZ5260BLT1G | Identical electrical specs, but AEC-Q101 qualified and PPAP-capable for automotive use | Required for under-hood or ADAS subsystems where automotive qualification is mandatory | Choose for automotive designs needing full traceability, process control, and extended temperature validation |
Compared with MMBZ5260BLT1G, BZX84-C43LT1G offers higher power margin but looser regulation, while SZMMBZ5260BLT1G adds automotive qualification without altering electrical behavior - enabling direct substitution where AEC-Q101 compliance is required.
Availability
MMBZ5260BLT1G is available at Aetrix Electronics and suitable for USB protection circuits, smartphone battery monitoring, industrial sensor conditioning, and IoT node power stabilization requiring stable component supply and SOT-23 surface-mount compatibility.
Supply support for MMBZ5260BLT1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxBLT1G series is part of onsemi's precision Zener voltage regulator product line, engineered for space-constrained, high-density PCBs in portable and battery-powered systems.
FAQ
What is the Zener voltage tolerance of MMBZ5260BLT1G?
The MMBZ5260BLT1G has a Zener voltage tolerance of ±5% around its nominal 43 V value, meaning the actual measured VZ falls between 40.85 V and 45.15 V at IZT = 3 mA and TA = 25°C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet. The MMBZ5260BLT1G maintains this specification across its qualified operating temperature range.
Does MMBZ5260BLT1G have a built-in ESD protection rating?
Yes, the MMBZ5260BLT1G is rated for Class 3 ESD protection per the Human Body Model (HBM), exceeding 16 kV. This rating is explicitly stated in the Features section of the onsemi datasheet and verified in the Absolute Maximum Ratings table. The MMBZ5260BLT1G's robust ESD performance eliminates the need for additional discrete protection in many consumer interface applications.
What is the thermal resistance of MMBZ5260BLT1G on standard PCB material?
The MMBZ5260BLT1G has a junction-to-ambient thermal resistance (RJA) of 556 °C/W when mounted on an FR-5 board, as specified in the Maximum Ratings table. This value assumes standard 1.0 × 0.75 × 0.62 inch board dimensions and defines the temperature rise per milliwatt of dissipated power. The MMBZ5260BLT1G's thermal performance is critical for ensuring safe operation within its −65°C to +150°C junction temperature range.
Is Pin 2 of MMBZ5260BLT1G electrically connected internally?
No, Pin 2 of the MMBZ5260BLT1G is designated "No Connection" (NC) and is not bonded to any internal die structure. This is confirmed in both the Marking Diagram section and the Pinout definition on page 2 of the onsemi datasheet, which states "Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode." The MMBZ5260BLT1G's Pin 2 must remain unconnected on the PCB to avoid unintended circuit paths or mechanical stress.
What is the maximum reverse leakage current for MMBZ5260BLT1G at 33 V?
The maximum reverse leakage current (IR) for the MMBZ5260BLT1G is 0.1 μA when biased at 33 V, as specified in the Electrical Characteristics table on page 3 of the onsemi datasheet. This low leakage ensures minimal quiescent current draw in always-on protection or reference circuits. The MMBZ5260BLT1G maintains this performance across its full storage temperature range of −65°C to +150°C.
MMBZ5260BLT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 93 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 33 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5260BLT1G FAQ
1.How can I place an order for MMBZ5260BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5260BLT1G 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 MMBZ5260BLT1G reliable?
The price and inventory of MMBZ5260BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5260BLT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5260BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5260BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5260BLT1G?
MMBZ5260BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5260BLT1G 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 MMBZ5260BLT1G?
For technical support, including MMBZ5260BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5260BLT1G requirements.
6.How does Aetrix verify that MMBZ5260BLT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5260BLT1G 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 MMBZ5260BLT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5260BLT1G?
All MMBZ5260BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5260BLT1G, 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 MMBZ5260BLT1G part is unused and in its original packaging.
Return procedure for MMBZ5260BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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