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onsemi MMBZ5263BLT1G
- Part No.:
- MMBZ5263BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5263BLT1G.pdf
- Description:
- DIODE ZENER 56V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:29,610
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Product details
Overview
MMBZ5263BLT1G from onsemi is a 56 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, 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 MMBZ5263BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (556 °C/W), ESD rating (>16 kV HBM), cathode-anode polarity marking, and compatibility with high-density automated assembly.
Technical Context
This device operates as a two-terminal voltage-regulating diode with defined breakdown behavior under reverse bias. Its nominal Zener voltage of 56 V is specified at 2.2 mA test current (IZT), with temperature coefficient optimized for stability across −65°C to +150°C junction range.
The SOT-23 package features pin 1 (anode), pin 2 (no connection), and pin 3 (cathode), enabling unidirectional clamping. Its 225 mW power rating applies to FR-5 board mounting, derating linearly above 25°C at 1.8 mW/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2 V min / 56 V nom / 58.8 V max @ IZT = 2.2 mA - defines stable regulation window for reference or protection circuits |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5 board - sets maximum continuous clamping energy without thermal runaway |
| Zener Impedance (ZZT) | 1300 Ω max @ IZT = 2.2 mA - indicates voltage regulation stiffness under varying load conditions |
| Leakage Current (IR) | 0.1 μA max @ VR = 43 V - ensures minimal standby current in high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - supports robust handling in consumer electronics assembly lines |
| Junction Temperature Range | −65°C to +150°C - enables operation in automotive under-hood or industrial ambient environments |
| Forward Voltage (VF) | 0.95 V max @ IF = 10 mA - confirms low-loss conduction in forward-biased protection paths |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm body, Pb-free and RoHS compliant. Cathode identified by band marking on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias regulation configuration |
| 2 | No Connection | Internally isolated; must remain unconnected in PCB layout |
| 3 | Cathode | Connected to higher-potential node; polarity band aligns with this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW power rating on FR-5 board | Enables compact voltage clamping in space-constrained handheld PCBs without forced cooling |
| ESD rating >16 kV (HBM) | Eliminates need for external ESD protection in front-end interface circuits of portable devices |
| Pb-free, halogen-free, RoHS-compliant | Meets global environmental compliance requirements for consumer and industrial end products |
| Optimized SOT-23 footprint | Supports high-speed pick-and-place placement and reflow soldering in automated manufacturing |
| −65°C to +150°C operating range | Validates use in extended-temperature applications such as automotive infotainment power rails |
Applications
| USB Power Input Protection | Smartphone Battery Monitoring |
|---|---|
Use Scenario: Clamps transient surges on 5 V USB input lines during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing fast-response overvoltage limiting before LDO or PMIC inputs. Use Value: Prevents damage to downstream 5 V rail components using only 225 mW dissipation and <10 ns response time inherent to Zener junction physics. |
Use Scenario: Provides stable reference voltage for ADC measurement of lithium-ion battery cell voltage in portable systems. IC Role / Device Role / Timing Role: Precision Zener reference source with 56 V nominal output scaled via resistor divider for 4.2 V full-scale reading. Use Value: Delivers ±5% voltage accuracy over temperature, enabling <1% battery state-of-charge estimation without trimming. |
| IoT Sensor Node Voltage Clamp | Industrial PLC Digital Input Protection |
Use Scenario: Limits induced transients on 3.3 V sensor supply lines in wireless environmental monitoring nodes. IC Role / Device Role / Timing Role: Low-leakage (0.1 μA) shunt clamp protecting ultra-low-power MCU and analog front-end circuitry. Use Value: Maintains system sleep current below 1 μA while surviving 16 kV HBM ESD events per IEC 61000-4-2. |
Use Scenario: Protects 24 V digital input optocoupler interfaces from field-wiring surge and polarity reversal faults. IC Role / Device Role / Timing Role: Reverse-biased Zener placed across input terminals to clamp negative excursions and absorb inductive kickback. Use Value: Withstands −65°C to +150°C ambient, ensuring reliability in uncontrolled factory environments without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C56LT1G | Same 56 V nominal Zener, but 350 mW rating and 60 Ω ZZT @ 5 mA - lower impedance, higher power | Preferred where tighter voltage regulation under variable load is required, e.g., precision reference buffers | Select BZX84-C56LT1G when lower dynamic impedance and higher power margin are needed; verify SOT-23 pinout compatibility (anode/cathode orientation matches) |
| MMBZ5263BS | Same electrical specs but in SOD-123 package - larger footprint, 500 mW rating, different thermal profile | Better suited for higher-energy transient suppression in industrial control modules with less board space constraint | Choose MMBZ5263BS when board layout allows larger package and higher surge energy absorption is prioritized over miniaturization |
Compared with MMBZ5263BLT1G, BZX84-C56LT1G offers superior regulation stiffness at higher test current but requires layout verification for cathode alignment, while MMBZ5263BS trades miniaturization for enhanced thermal robustness in non-portable equipment.
Availability
MMBZ5263BLT1G is available at Aetrix Electronics and suitable for USB power protection, smartphone battery monitoring, IoT sensor node clamping, and industrial PLC input protection requiring stable component supply and long-term manufacturability.
Supply support for MMBZ5263BLT1G 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 manufacturer specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
The MMBZ52xxBLT1G series was designed specifically for space-constrained, high-density portable electronics requiring reliable, low-profile voltage regulation and ESD-hardened performance.
FAQ
What is the Zener voltage tolerance of MMBZ5263BLT1G?
The MMBZ5263BLT1G has a Zener voltage specification of 53.2 V minimum, 56 V nominal, and 58.8 V maximum at 2.2 mA test current (IZT), representing a ±5% tolerance band around the nominal value. This tolerance is guaranteed across the full operating temperature range of −65°C to +150°C and is validated per onsemi's production testing protocol.
Does MMBZ5263BLT1G have a built-in ESD protection rating?
Yes, MMBZ5263BLT1G is rated Class 3 for ESD per the Human Body Model (HBM) with >16 kV withstand capability. This rating is verified per ANSI/ESDA/JEDEC JS-001 and applies to both anode and cathode terminals. The device does not require external ESD components in most portable electronics designs when used per recommended layout guidelines.
What is the thermal resistance of MMBZ5263BLT1G on standard PCB material?
The junction-to-ambient thermal resistance (RJA) of MMBZ5263BLT1G is 556 °C/W when mounted on FR-5 board. This value assumes standard 1.0 × 0.75 × 0.62 inch test board per JEDEC JESD51-2. Derating is linear at 1.8 mW/°C above 25°C ambient, meaning usable power drops to 189 mW at 85°C board temperature.
How is the polarity marked on the MMBZ5263BLT1G SOT-23 package?
The MMBZ5263BLT1G uses a cathode band marking on the SOT-23 case to indicate pin 3 (cathode). Pin 1 is the anode, pin 2 is no connection, and the band aligns with the cathode terminal per onsemi's mechanical drawing 98ASB42226B. This marking is visible under 10× magnification and remains legible after standard reflow soldering profiles.
Can MMBZ5263BLT1G be used in automotive applications?
While MMBZ5263BLT1G itself is not AEC-Q101 qualified, its automotive-grade counterpart SZMMBZ5263BLT1G is fully qualified and PPAP-capable. For non-safety-critical automotive subsystems (e.g., infotainment power rails), MMBZ5263BLT1G may be used subject to customer qualification, but design-in should follow SZ-prefix part for certified compliance.
MMBZ5263BLT1G 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):
- 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5263BLT1G FAQ
1.How can I place an order for MMBZ5263BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5263BLT1G 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 MMBZ5263BLT1G reliable?
The price and inventory of MMBZ5263BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5263BLT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5263BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5263BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5263BLT1G?
MMBZ5263BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5263BLT1G 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 MMBZ5263BLT1G?
For technical support, including MMBZ5263BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5263BLT1G requirements.
6.How does Aetrix verify that MMBZ5263BLT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5263BLT1G 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 MMBZ5263BLT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5263BLT1G?
All MMBZ5263BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5263BLT1G, 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 MMBZ5263BLT1G part is unused and in its original packaging.
Return procedure for MMBZ5263BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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