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onsemi SZMMBZ5263BLT1
- Part No.:
- SZMMBZ5263BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5263BLT1.pdf
- Description:
- DIODE ZENER 56V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:87,000
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Product details
Overview
SZMMBZ5263BLT1 from onsemi is a 56 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 150 Ω maximum Zener 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 SZMMBZ5263BLT1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W), AEC-Q101 qualification, ESD rating (>16 kV HBM), and Pb-free SOT-23 packaging compatibility with automated assembly.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown at nominal 56 V with temperature coefficient near +0.075 %/°C (derived from typical TC curve for 56 V devices). Its 225 mW FR-5 rating and 556 °C/W junction-to-ambient thermal resistance define safe continuous operation up to +125°C ambient under derated conditions.
The SOT-23 package features Pin 1 (Anode), Pin 2 (No Connection), and Pin 3 (Cathode), with cathode polarity indicated by band marking. It supports high-density PCB layouts and meets UL 94 V-0 flammability and AEC-Q101 automotive stress testing requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2–58.8 V at IZT = 2.2 mA - defines stable regulation window for feedback or clamp circuits |
| Power Dissipation (PD) | 225 mW on FR-5 board @ 25°C - sets maximum continuous DC or pulsed power without thermal runaway |
| Zener Impedance (ZZT) | 1300 Ω max @ IZT = 2.2 mA - determines AC ripple rejection and regulation stability under load variation |
| Reverse Leakage (IR) | 0.1 µA max @ VR = 43 V - ensures minimal standby current in battery-powered voltage monitor paths |
| ESD Rating | Class 3 (>16 kV) per HBM - enables robust handling in manual assembly and field-replaceable modules |
| Thermal Resistance (RJA) | 556 °C/W - requires careful trace width and copper pour design to maintain TJ < 150°C in sealed enclosures |
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for infotainment and body control modules |
Pinout & Package
SOT-23 (Case 318, Style 8), surface-mount plastic package with void-free thermosetting molding, corrosion-resistant finish, and UL 94 V-0 flammability rating. Cathode identified by band; maximum soldering temperature 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; must be routed with low-inductance path for transient clamping |
| 2 | No Connection | Floating terminal - no PCB trace or pad required; must remain unconnected to avoid parasitic coupling |
| 3 | Cathode | Connected to regulated or clamped node; polarity band aligns with this pin for visual orientation during placement |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW FR-5 Power Rating | Enables compact voltage reference design without heatsinking in handheld PCBs with ≤1.0 × 0.75 inch area |
| AEC-Q101 Qualification | Supports automotive applications requiring validated reliability across −40°C to +125°C operating range and 1000-cycle temperature cycling |
| ESD >16 kV (HBM) | Eliminates need for external ESD protection in USB port voltage monitors and sensor interface rails |
| Pb-Free (G-suffix compatible) | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile for lead-free assembly |
| Optimized SOT-23 Footprint | Reduces board area by 60% vs. DO-35, enabling ≥2× higher component density in multi-rail power management sections |
Applications
| Portable Device Voltage Clamp | Automotive Sensor Reference |
|---|---|
Use Scenario: Clamping 5 V supply rail against ESD transients in Bluetooth headset PCBs. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector between VCC and GND. Use Value: 56 V breakdown prevents damage to 5 V LDOs and baseband ICs while drawing only 0.1 µA leakage at 43 V. |
Use Scenario: Providing stable 56 V reference for fuel injector driver feedback loop in engine control unit. IC Role / Device Role / Timing Role: Precision voltage reference for analog comparator threshold setting. Use Value: ±5% VZ tolerance and AEC-Q101 qualification ensure consistent trip point across −40°C to +125°C ambient. |
| High-Density PC Board Regulator | Battery-Powered IoT Node Protection |
Use Scenario: Generating local 56 V bias for op-amp input stage in industrial data acquisition module. IC Role / Device Role / Timing Role: Two-terminal Zener regulator replacing three-component discrete solution. Use Value: SOT-23 footprint saves 2.2 mm² vs. DO-35, enabling tighter layout around 16-bit ADC routing. |
Use Scenario: Overvoltage protection for Li-ion battery charger IC input during hot-plug events. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping surge above 56 V. Use Value: 1300 Ω ZZT limits clamping voltage rise to <1.5 V above VZ at 2.2 mA, preserving downstream FET gate integrity. |
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 | 56 V ±5%, 300 mW rating, 60 Ω ZZT @ 5 mA - lower impedance but higher power and larger thermal mass | Requires larger PCB area and different thermal layout; not AEC-Q101 qualified | Preferred where tighter regulation is needed and automotive qualification is unnecessary |
| SZBZX84C56LT3G | 56 V ±5%, 300 mW, AEC-Q101 qualified, 60 Ω ZZT @ 5 mA - same qualification but higher power and lower impedance | Higher IZT (5 mA vs. 2.2 mA) demands stronger bias source; not drop-in due to different test current | Chosen when system can support 5 mA bias and needs improved dynamic regulation performance |
Compared with SZMMBZ5263BLT1, BZX84-C56LT1G offers lower Zener impedance but lacks automotive qualification and uses more board space, while SZBZX84C56LT3G provides identical qualification with superior regulation at higher bias current - both require layout and bias circuit review before substitution.
Availability
SZMMBZ5263BLT1 is available at Aetrix Electronics and suitable for automotive body electronics, portable medical sensors, and high-density industrial control systems requiring stable component supply with full traceability and lifecycle management.
Supply support for SZMMBZ5263BLT1 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
SZMMBZ5263BLT1 belongs to the MMBZ52xxBLT1/SZMMBZ52xxBLT1G Zener regulator family, designed specifically for space-constrained, high-reliability voltage reference and protection in automotive and portable electronics.
FAQ
What is the Zener voltage tolerance of SZMMBZ5263BLT1?
The SZMMBZ5263BLT1 has a Zener voltage range of 53.2 V to 58.8 V at test current IZT = 2.2 mA, corresponding to a ±5% tolerance about the nominal 56 V value. This tolerance is guaranteed across the full operating temperature range of −65°C to +150°C and is verified per AEC-Q101 stress testing protocols. The SZMMBZ5263BLT1 datasheet specifies this range in the Electrical Characteristics table on page 3.
Is SZMMBZ5263BLT1 suitable for automotive applications?
Yes, SZMMBZ5263BLT1 is AEC-Q101 qualified and PPAP capable, with validation across temperature cycling, humidity bias, and mechanical shock tests required for automotive under-hood and cabin modules. Its SZ prefix denotes compliance with automotive-specific site and process controls. The SZMMBZ5263BLT1 is commonly used in engine control units and ADAS sensor interfaces where long-term reliability under thermal stress is critical.
What is the maximum reverse leakage current for SZMMBZ5263BLT1?
The maximum reverse leakage current for SZMMBZ5263BLT1 is 0.1 µA at VR = 43 V and TA = 25°C, as specified in the Electrical Characteristics table. This low leakage ensures minimal quiescent current draw in battery-powered applications such as wearable health monitors and wireless sensor nodes where standby power budget is tightly constrained. The SZMMBZ5263BLT1 maintains this specification across its full storage temperature range.
Does SZMMBZ5263BLT1 have a no-connect pin, and how should it be handled?
Yes, SZMMBZ5263BLT1 has Pin 2 designated as "No Connection" per the official pinout diagram in the datasheet. This terminal must remain unconnected on the PCB - no trace, pad, or via should be routed to it. Leaving Pin 2 floating avoids parasitic capacitance or unintended coupling that could degrade high-frequency transient response. The SZMMBZ5263BLT1 SOT-23 package layout explicitly isolates this pin from internal die structure.
What is the thermal resistance of SZMMBZ5263BLT1 on FR-5 board?
The junction-to-ambient thermal resistance (RJA) of SZMMBZ5263BLT1 is 556 °C/W when mounted on FR-5 board, as stated in the Maximum Ratings table. This value assumes standard 1.0 × 0.75 inch board size and defines the temperature rise per milliwatt of dissipated power. To maintain junction temperature below 150°C at 225 mW, ambient must stay below +30°C unless additional copper pour or airflow is applied. The SZMMBZ5263BLT1 thermal performance is validated per JEDEC JESD51-2 standards.
SZMMBZ5263BLT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZMMBZ5263BLT1 FAQ
1.How can I place an order for SZMMBZ5263BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5263BLT1 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 SZMMBZ5263BLT1 reliable?
The price and inventory of SZMMBZ5263BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5263BLT1 is usually 5 days.
3.What payment methods are accepted for SZMMBZ5263BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5263BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5263BLT1?
SZMMBZ5263BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5263BLT1 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 SZMMBZ5263BLT1?
For technical support, including SZMMBZ5263BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5263BLT1 requirements.
6.How does Aetrix verify that SZMMBZ5263BLT1 is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5263BLT1 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 SZMMBZ5263BLT1 meets industry standards.
7.What is the process for return or replacement of SZMMBZ5263BLT1?
All SZMMBZ5263BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5263BLT1, 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 SZMMBZ5263BLT1 part is unused and in its original packaging.
Return procedure for SZMMBZ5263BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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