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onsemi MMBZ5263BLT1
- Part No.:
- MMBZ5263BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5263BLT1.pdf
- Description:
- DIODE ZENER 56V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,083
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Product details
Overview
MMBZ5263BLT1 from onsemi is a 56 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 1300 Ω dynamic impedance at 2.2 mA test current and 0.1 μA leakage at 43 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the MMBZ5263BLT1 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, thermal resistance (556 °C/W), ESD rating (>16 kV HBM), cathode-anode polarity marking, and compatibility with automated SMT assembly on high-density PCBs.
Technical Context
This device operates as a two-terminal voltage regulator diode, conducting in reverse breakdown to maintain stable voltage across its terminals. Its Zener voltage is specified at IZT = 2.2 mA with ±5% tolerance and exhibits a positive temperature coefficient above ~5 V, typical for 56 V devices.
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 Class 3 ESD robustness (>16 kV HBM) and complies with RoHS, Pb-free, and halogen-free requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2 V min / 56 V nominal / 58.8 V max @ IZT = 2.2 mA - defines regulated output voltage range under standard test conditions |
| Power Dissipation (PD) | 225 mW on FR-5 board @ 25°C - sets maximum continuous power handling before thermal derating begins |
| Zener Impedance (ZZT) | 1300 Ω max @ IZT = 2.2 mA - indicates voltage regulation stability under small-signal AC variations |
| Leakage Current (IR) | 0.1 μA max @ VR = 43 V - ensures minimal standby current in clamping or reference applications |
| Thermal Resistance (RJA) | 556 °C/W on FR-5 board - determines junction temperature rise per milliwatt of dissipated power |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables robust handling in manual and automated assembly environments |
| Operating Temperature | −65°C to +150°C - supports operation in extended industrial and automotive ambient conditions |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body size, void-free thermosetting plastic case, cathode indicated by polarity band, UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Forward current entry point; reverse-biased during Zener operation |
| Pin 2 | No Connection | Internally unconnected terminal - must remain floating in PCB layout |
| Pin 3 | Cathode | Forward current exit point; connected to regulated voltage node in clamp/reference circuits |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW power rating on FR-5 board | Enables compact voltage regulation without heatsinking in space-constrained portable designs |
| ESD robustness >16 kV (HBM) | Reduces risk of field failure during handling and board-level integration |
| Pb-free, halogen-free, RoHS-compliant | Meets global environmental compliance mandates for commercial and industrial end equipment |
| Optimized SOT-23 footprint | Supports high-density PCB layouts and fully automated pick-and-place assembly |
| Stable Zener voltage over −65°C to +150°C | Ensures consistent reference or protection behavior across wide environmental operating ranges |
Applications
| Smartphone Power Rail Protection | IoT Sensor Node Reference |
|---|---|
Use Scenario: Clamping transient overvoltage on 5 V USB-powered sensor interface lines. IC Role / Device Role / Timing Role: Two-terminal shunt voltage clamp protecting downstream analog front-end ICs. Use Value: Limits voltage excursions to ≤58.8 V while drawing <0.1 μA leakage at 43 V, minimizing standby power impact. |
Use Scenario: Providing stable 56 V reference for battery cell monitoring circuitry in multi-cell Li-ion packs. IC Role / Device Role / Timing Role: Precision Zener reference source for ADC input scaling and threshold detection. Use Value: Delivers ±5% voltage accuracy at 2.2 mA with 1300 Ω dynamic impedance, enabling repeatable measurement calibration. |
| Wearable Device ESD Suppression | Industrial Control Signal Conditioning |
Use Scenario: Protecting touch controller I/O pins against human-body ESD events. IC Role / Device Role / Timing Role: Fast-response shunt clamp absorbing >16 kV HBM pulses without latch-up. Use Value: Leverages Class 3 ESD rating and low capacitance to suppress transients while preserving signal integrity. |
Use Scenario: Stabilizing 24 V DC control logic supply against line surges in factory automation PLC modules. IC Role / Device Role / Timing Role: Overvoltage limiter placed across supply rail to prevent damage to microcontroller peripherals. Use Value: Maintains regulation within 53.2–58.8 V window at 2.2 mA, compatible with standard 24 V system margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C56LT1G | Same 56 V nominal Zener voltage, but 350 mW power rating and 60 Ω ZZT @ 5 mA - lower impedance, higher power capability | Requires higher test current (5 mA vs. 2.2 mA); better suited for higher-current regulation where thermal margin allows | Select when lower dynamic impedance and higher power headroom are prioritized over strict 225 mW footprint constraints |
| SZMMBZ5263BLT1G | Identical electrical specs and SOT-23 package, but AEC-Q101 qualified and PPAP-capable for automotive use | Designed for automotive-grade traceability, process control, and qualification - not required for commercial portable applications | Choose only if automotive qualification (AEC-Q101) and PPAP documentation are mandatory for the target program |
Compared with BZX84-C56LT1G and SZMMBZ5263BLT1G, the MMBZ5263BLT1 offers optimized cost and footprint for non-automotive, low-power portable applications where 225 mW dissipation and 1300 Ω impedance meet design requirements without over-specifying.
Availability
MMBZ5263BLT1 is available at Aetrix Electronics and suitable for smartphone power rail protection, IoT sensor node reference, wearable device ESD suppression, and industrial control signal conditioning requiring stable component supply and full SOT-23 tape-and-reel logistics support.
Supply support for MMBZ5263BLT1 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxBLT1G series is part of onsemi's precision Zener voltage regulator portfolio, designed specifically for space-constrained, low-power voltage reference and overvoltage protection in portable and high-density electronic systems.
FAQ
What is the Zener voltage tolerance of MMBZ5263BLT1?
The MMBZ5263BLT1 has a nominal Zener voltage of 56 V with a tolerance of ±5%, meaning the actual measured voltage falls between 53.2 V and 58.8 V when tested at IZT = 2.2 mA and TA = 25°C. This tolerance is confirmed in the Electrical Characteristics table of the official onsemi datasheet revision 16. The MMBZ5263BLT1 maintains this specification across its qualified operating temperature range.
Does MMBZ5263BLT1 have a built-in capacitor or ESD protection structure?
The MMBZ5263BLT1 is a discrete Zener diode with no integrated capacitor; its typical capacitance is not specified in the datasheet but falls within the sub-pF range common to SOT-23 Zeners at 50% VZ bias. However, it does feature inherent ESD robustness rated at Class 3 (>16 kV) per Human Body Model, verified per JEDEC JS-001, making it suitable for direct I/O protection without external TVS augmentation in many portable designs.
Can MMBZ5263BLT1 be used in place of MMBZ5263BLT1G?
No - MMBZ5263BLT1 and MMBZ5263BLT1G are distinct orderable parts. The "G" suffix denotes Pb-free, halogen-free, and RoHS-compliant construction per onsemi's packaging standards. MMBZ5263BLT1 (without G) is not documented in the provided datasheet and lacks confirmation of environmental compliance or electrical equivalence. For guaranteed specifications and compliance, MMBZ5263BLT1G is the validated, supported version.
What is the thermal resistance of MMBZ5263BLT1 on standard PCB material?
The MMBZ5263BLT1 has a junction-to-ambient thermal resistance (RJA) of 556 °C/W when mounted on an FR-5 board measuring 1.0 × 0.75 × 0.62 inches. This value assumes natural convection cooling and defines how much the junction temperature rises per milliwatt of dissipated power. Derating begins above 25°C at 1.8 mW/°C, limiting usable power at elevated ambient temperatures.
Is Pin 2 of MMBZ5263BLT1 electrically connected internally?
No - Pin 2 of the MMBZ5263BLT1 is explicitly designated as "No Connection" (NC) in the datasheet's marking diagram and mechanical outline (Style 8). It is not bonded to any internal die structure and must remain unconnected in the PCB layout. Routing or soldering to Pin 2 may compromise reliability or violate the device's qualified thermal and electrical performance.
MMBZ5263BLT1 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)
MMBZ5263BLT1 FAQ
1.How can I place an order for MMBZ5263BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5263BLT1 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 MMBZ5263BLT1 reliable?
The price and inventory of MMBZ5263BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5263BLT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5263BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5263BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5263BLT1?
MMBZ5263BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5263BLT1 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 MMBZ5263BLT1?
For technical support, including MMBZ5263BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5263BLT1 requirements.
6.How does Aetrix verify that MMBZ5263BLT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5263BLT1 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 MMBZ5263BLT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5263BLT1?
All MMBZ5263BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5263BLT1, 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 MMBZ5263BLT1 part is unused and in its original packaging.
Return procedure for MMBZ5263BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5263BLT1 Tags
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