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onsemi MMBZ5262ELT1
- Part No.:
- MMBZ5262ELT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
MMBZ5262ELT1.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
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Product details
Overview
MMBZ5262ELT1 from onsemi is a 51 V ±5% Zener voltage regulator diode in SOT-23 package, rated for 225 mW power dissipation at 25°C on FR-5 board, with 2.5 mA test current, 125 Ω dynamic impedance at IZT, and 0.1 µA leakage at 37 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in portable power rails and signal conditioning circuits.
For engineers reviewing the MMBZ5262ELT1 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), peak pulse power capability (225 W), and Pb-free SOT-23 packaging compatibility with automated assembly.
Technical Context
The MMBZ5262ELT1 operates as a two-terminal, silicon planar Zener diode with cathode-anode polarity and no internal connection on pin 2. Its regulation behavior is defined by reverse-biased breakdown at 51 V nominal, with temperature coefficient near +4.5 mV/°C (inferred from Figure 1 trend for ~50 V devices).
It delivers stable voltage reference under DC or low-frequency transient conditions, with specified Zener impedance (125 Ω @ 2.5 mA) and leakage current (0.1 µA @ 37 V), and supports surge immunity via 225 W 8×20 µs pulse rating per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48.45–53.55 V @ IZT = 2.5 mA - defines regulated output range for voltage reference or clamping |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5 board - sets maximum continuous DC power handling in standard PCB layout |
| Zener Impedance (ZZT) | 125 Ω @ IZT = 2.5 mA - determines regulation accuracy under load variation |
| Leakage Current (IR) | 0.1 µA @ VR = 37 V - ensures minimal parasitic current in high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables robust handling in manual assembly and field environments |
| Thermal Resistance (RJA) | 556 °C/W - quantifies junction-to-ambient heat rise per watt, critical for derating above 25°C |
| Package | SOT-23 (Case 318, Style 8) - surface-mount footprint with 1-Anode / 2-NC / 3-Cathode pinout for space-constrained designs |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting body, UL 94 V-0 flammability rating, Pb-free compliant, cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential side of Zener circuit; forward-biased during conduction |
| 2 | No Connection | Internally unconnected; must remain floating - not usable for grounding or sensing |
| 3 | Cathode | Connected to higher-potential side; Zener breakdown occurs between pins 1 and 3 |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW power rating on FR-5 board | Enables use in compact, low-power voltage reference circuits without heatsinking |
| ESD rating >16 kV (HBM) | Reduces risk of electrostatic damage during handling and board-level integration |
| Peak pulse power: 225 W (8 × 20 µs) | Provides transient overvoltage protection against common ESD and surge events |
| Pb-free SOT-23 packaging | Meets RoHS compliance requirements and supports lead-free reflow soldering profiles |
| Small outline (2.9 mm × 1.3 mm × 1.0 mm) | Fits high-density layouts in smartphones, wearables, and IoT sensor nodes |
Applications
| Portable Power Rail Clamping | Low-Power Voltage Reference |
|---|---|
|
Use Scenario: Protecting 3.3 V or 5 V logic rails in battery-powered handheld devices from transient overvoltage. IC Role / Device Role / Timing Role: Zener clamping diode placed between rail and ground to shunt excess energy above 51 V threshold. Use Value: Prevents latch-up or damage to downstream ICs during ESD events or supply coupling transients. |
Use Scenario: Providing stable reference voltage for ADC biasing or comparator hysteresis in ultra-low-power sensor nodes. IC Role / Device Role / Timing Role: Two-terminal passive reference element delivering precise 51 V node for scaling or calibration circuits. Use Value: Enables accurate analog measurement without active regulator overhead or quiescent current penalty. |
| Signal-Level Overvoltage Protection | High-Density Board Voltage Regulation |
|
Use Scenario: Safeguarding analog front-end inputs (e.g., microphone bias, sensor excitation) against accidental 48 V phantom power exposure. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as crowbar element to clamp input to safe level before amplifier input stage. Use Value: Maintains signal integrity while preventing permanent damage to sensitive input transistors. |
Use Scenario: Local regulation of auxiliary 51 V supplies in telecom line cards or industrial PLC modules with tight board area constraints. IC Role / Device Role / Timing Role: Discrete Zener regulator replacing larger TO-92 or axial packages where space is premium. Use Value: Achieves same regulation function in <10% of the footprint of legacy through-hole alternatives. |
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-C51LT1G | Same 51 V nominal Zener voltage, but 300 mW rating and 60 Ω ZZT; SOT-23 package with identical pinout (1-A, 2-NC, 3-K) | Higher power handling and lower impedance support more demanding regulation stability in variable-load scenarios | Select when tighter voltage regulation under load variation is required and board layout allows same footprint |
| MMBZ5263ELT1/T3, G | 56 V nominal Zener voltage (min/max 53.2–58.8 V), otherwise identical SOT-23 package, 2.2 mA IZT, 150 Ω ZZT | Used where system overvoltage threshold is raised to 56 V, e.g., 48 V industrial bus systems with wider tolerance margins | Choose for 56 V clamping applications requiring same reliability, ESD rating, and assembly compatibility as MMBZ5262ELT1 |
Compared with BZX84-C51LT1G and MMBZ5263ELT1/T3, G, the MMBZ5262ELT1 offers optimized 51 V regulation with moderate impedance and industry-standard 225 mW dissipation-ideal for cost-sensitive, space-constrained clamping where 125 Ω ZZT meets design margin requirements.
Availability
MMBZ5262ELT1 is available at Aetrix Electronics and suitable for portable power rail clamping, low-power voltage reference, and signal-level overvoltage protection requiring stable component supply across consumer electronics, industrial sensors, and telecom infrastructure programs.
Supply support for MMBZ5262ELT1 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, and discrete components for automotive, industrial, and cloud power applications.
The MMBZ5221ELT1 series-including MMBZ5262ELT1-is designed for compact, high-reliability voltage regulation in space-constrained portable and embedded systems, emphasizing manufacturability, ESD robustness, and thermal performance in SOT-23 form factor.
FAQ
What is the nominal Zener voltage of the MMBZ5262ELT1?
The MMBZ5262ELT1 has a nominal Zener voltage of 51 V, with a guaranteed range of 48.45 V to 53.55 V when tested at IZT = 2.5 mA and TA = 25°C. This value is specified in the Electrical Characteristics table on page 3 of the official onsemi datasheet for the MMBZ5221ELT1 series. The MMBZ5262ELT1 maintains this voltage tolerance across its qualified operating temperature range.
Does the MMBZ5262ELT1 have a functional pin 2?
No, pin 2 of the MMBZ5262ELT1 is internally not connected (NC). As confirmed in the device marking diagram and Electrical Characteristics table, the SOT-23 package uses pin 1 as anode and pin 3 as cathode, with pin 2 left unconnected. PCB layout must ensure pin 2 remains floating-no routing or grounding is permitted, as it serves no electrical function in the MMBZ5262ELT1.
What is the maximum power dissipation of the MMBZ5262ELT1 on a standard FR-5 board?
The MMBZ5262ELT1 is rated for 225 mW total power dissipation on an FR-5 board at ambient temperature (TA) of 25°C, with linear derating of 1.8 mW/°C above that temperature. This rating is explicitly stated in the Maximum Ratings table on page 1 of the onsemi datasheet and applies to typical PCB mounting conditions without forced airflow or heatsinking.
Is the MMBZ5262ELT1 RoHS-compliant and Pb-free?
Yes, the "G" suffix in MMBZ5262ELT1/T3, G indicates a Pb-free package, fully compliant with RoHS Directive 2011/65/EU. The datasheet confirms Pb-free availability and references onsemi's Pb-free strategy documentation. The MMBZ5262ELT1 supports standard lead-free reflow soldering profiles and carries UL 94 V-0 flammability certification.
What is the Zener impedance of the MMBZ5262ELT1 at its test current?
The MMBZ5262ELT1 exhibits a maximum Zener impedance (ZZT) of 125 Ω when measured at its specified test current IZT = 2.5 mA and TA = 25°C. This parameter is listed in the Electrical Characteristics table on page 3 and directly impacts regulation accuracy under varying load conditions-lower impedance yields tighter voltage stability for the MMBZ5262ELT1.
MMBZ5262ELT1 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:
- -
MMBZ5262ELT1 FAQ
1.How can I place an order for MMBZ5262ELT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5262ELT1 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 MMBZ5262ELT1 reliable?
The price and inventory of MMBZ5262ELT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5262ELT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5262ELT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5262ELT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5262ELT1?
MMBZ5262ELT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5262ELT1 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 MMBZ5262ELT1?
For technical support, including MMBZ5262ELT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5262ELT1 requirements.
6.How does Aetrix verify that MMBZ5262ELT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5262ELT1 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 MMBZ5262ELT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5262ELT1?
All MMBZ5262ELT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5262ELT1, 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 MMBZ5262ELT1 part is unused and in its original packaging.
Return procedure for MMBZ5262ELT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5262ELT1 Tags
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