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onsemi SZMMBZ5263ELT1G
- Part No.:
- SZMMBZ5263ELT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5263ELT1G.pdf
- Description:
- DIODE ZENER 56V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,604
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Product details
Overview
SZMMBZ5263ELT1G from onsemi is an automotive-grade Zener diode in SOT-23 package, providing 56 V nominal reverse breakdown voltage at 2.2 mA test current, 1300 Ω maximum dynamic impedance at IZK, and 0.1 μA reverse leakage at 43 V, used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SZMMBZ5263ELT1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal derating behavior, SOT-23 terminal mapping, and direct alternative parts with documented differences in Zener voltage tolerance and leakage performance.
Technical Context
This device operates as a two-terminal voltage reference with cathode-anode polarity, designed for stable DC voltage clamping under reverse bias. Its 56 V nominal Zener voltage falls within the high-voltage segment of the MMBZ52xx/SZMMBZ52xx family, where temperature coefficient shifts from negative to positive above ~5.6 V and stabilizes near zero at 56 V per typical characterization data.
The SOT-23 package supports automated placement and reflow soldering with 260°C/10s max soldering temperature. It features a no-connect (NC) terminal (Pin 2), enabling mechanical stability without electrical function-distinct from dual-anode or dual-cathode variants in the same outline.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2–58.8 V @ IZT = 2.2 mA - defines clamping threshold with ±5% tolerance band for feedback loop setpoint accuracy. |
| Dynamic Impedance (ZZT) | 1300 Ω @ IZK = 0.25 mA - indicates voltage regulation stiffness under low-current conditions typical in standby mode. |
| Reverse Leakage (IR) | 0.1 μA @ VR = 43 V - ensures minimal quiescent current draw in high-impedance sensing nodes. |
| Power Dissipation (PD) | 225 mW on FR-5 board @ TA = 25°C - sets maximum continuous power handling before thermal derating begins at 1.8 mW/°C. |
| Junction Temperature Range | −65°C to +150°C - enables operation in under-hood automotive environments and industrial control enclosures. |
| ESD Rating | Class 3 (>16 kV HBM) - provides robustness against handling-induced electrostatic discharge during PCB assembly. |
| Package | SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm - fits high-density layouts while maintaining thermal resistance of 556°C/W (Junction-to-Ambient). |
Pinout & Package
SOT-23 plastic surface-mount package with void-free thermosetting case, corrosion-resistant finish, UL 94 V-0 flammability rating, and cathode indicated by polarity band. Pin 2 is internally unconnected and must remain floating in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; forms current path into diode during regulation. |
| 2 | No Connection (NC) | Internally unconnected terminal; must not be soldered to trace or plane to avoid mechanical stress or parasitic coupling. |
| 3 | Cathode | Connected to higher-potential node; output reference voltage appears at this terminal when reverse biased above VZ. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control units and body electronics requiring PPAP documentation support. |
| Pb-Free Construction | RoHS-compliant packaging with "G" suffix and optional microdot marking; compatible with lead-free reflow profiles. |
| High ESD Robustness | Withstands >16 kV human-body-model discharge without parameter shift-critical for handheld and field-deployable equipment. |
| Thermal Stability | Specified junction temperature range (−65°C to +150°C) supports operation across extended ambient conditions without derating loss. |
| Low-Leakage Regulation | 0.1 μA max reverse leakage at 43 V enables use in battery-backed systems where standby current must remain sub-microamp. |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamping 12 V rail transients caused by load dump or alternator switching in engine management systems. IC Role / Device Role / Timing Role: Voltage clamp protecting ADC reference inputs and microcontroller I/O pins from overvoltage events. Use Value: Prevents latch-up or permanent damage during ISO 7637-2 Pulse 5a (load dump) events up to 60 V peak. |
Use Scenario: Protecting 4–20 mA current loop receiver inputs from induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Standby-mode shunt regulator limiting input voltage to op-amp front-end during fault conditions. Use Value: Maintains signal integrity below 56 V while drawing only 0.1 μA leakage-no impact on loop accuracy. |
| Medical Infusion Pump Power Supply Feedback | Telecom Base Station Bias Reference |
Use Scenario: Providing stable 56 V reference for isolated flyback converter feedback in Class II medical power supplies. IC Role / Device Role / Timing Role: Precision Zener element setting secondary-side regulation threshold via optocoupler interface. Use Value: ±5% VZ tolerance and <1300 Ω ZZK ensure <±1.5% output voltage regulation across line/load/temperature. |
Use Scenario: Generating stable bias voltage for RF power amplifier stages operating from 48 V telecom rectifier outputs. IC Role / Device Role / Timing Role: Low-noise voltage reference source for gate bias networks requiring minimal thermal drift. Use Value: Near-zero temperature coefficient at 56 V minimizes drift over −40°C to +85°C operating range. |
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 nominal Zener voltage, ±5% tolerance, but rated at 300 mW and lacks AEC-Q101 qualification. | Not suitable for automotive production; acceptable for industrial prototypes or non-safety-critical consumer designs. | Select only if higher power margin is required and automotive qualification is unnecessary. |
| SZBZX84C56LT1G | 56 V nominal Zener voltage, ±5% tolerance, AEC-Q101 qualified, but uses SOT-23 with different pinout (Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC). | Requires PCB layout revision due to reversed anode/cathode pin assignment; not drop-in replaceable. | Choose only when redesigning for improved thermal performance (300 mW rating) and full automotive compliance. |
Compared with SZMMBZ5263ELT1G, BZX84-C56LT1G offers higher power headroom but no automotive qualification, while SZBZX84C56LT1G matches AEC-Q101 requirements but demands pinout-aware layout changes-neither is pin-compatible, making SZMMBZ5263ELT1G uniquely suited for space-constrained, qualified automotive voltage reference roles.
Availability
SZMMBZ5263ELT1G is available at Aetrix Electronics and suitable for automotive ECU power monitoring, industrial PLC analog input protection, and medical infusion pump power supply feedback requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMMBZ5263ELT1G 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, with headquarters in Phoenix, Arizona.
SZMMBZ5263ELT1G belongs to the SZMMBZ52xxELT1G series-a family of AEC-Q101-qualified Zener diodes engineered specifically for automotive power management, sensor conditioning, and ECU protection circuits demanding high reliability and thermal resilience.
FAQ
What is the Zener voltage tolerance of SZMMBZ5263ELT1G?
The SZMMBZ5263ELT1G has a Zener voltage range of 53.2 V (min) to 58.8 V (max) at IZT = 2.2 mA, corresponding to a ±5% tolerance around the nominal 56 V rating. This tolerance is fully specified in the Electrical Characteristics table on page 3 of the official onsemi datasheet and applies across the full operating temperature range of −65°C to +150°C.
Is SZMMBZ5263ELT1G pin-compatible with standard MMBZ5263ELT1G?
Yes, SZMMBZ5263ELT1G shares identical SOT-23 pinout (Pin 1 = Anode, Pin 2 = NC, Pin 3 = Cathode), mechanical dimensions, and thermal characteristics with MMBZ5263ELT1G. The "SZ" prefix denotes automotive qualification (AEC-Q101, PPAP-capable) and unique site/control change tracking-but electrically and physically, SZMMBZ5263ELT1G is a direct replacement for MMBZ5263ELT1G in existing layouts.
What is the maximum reverse leakage current for SZMMBZ5263ELT1G?
The maximum reverse leakage current for SZMMBZ5263ELT1G is 0.1 μA at VR = 43 V and TA = 25°C, as confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet. This value remains stable across the full storage temperature range and supports ultra-low-power applications such as battery-backed monitoring circuits.
Does SZMMBZ5263ELT1G require derating above 25°C ambient?
Yes, SZMMBZ5263ELT1G requires linear derating above 25°C ambient temperature: its power dissipation decreases by 1.8 mW/°C on FR-5 board, reaching zero at approximately 158°C. This derating curve is defined in the Maximum Ratings table and must be applied in thermal design for enclosed automotive or industrial enclosures where ambient exceeds 25°C.
Can SZMMBZ5263ELT1G be used in place of a 56 V Zener diode in a feedback divider network?
Yes, SZMMBZ5263ELT1G is explicitly designed for voltage reference and feedback applications, with 56 V nominal Zener voltage, low dynamic impedance (1300 Ω), and tight tolerance-making it suitable for precision feedback divider networks in isolated DC-DC converters. Its AEC-Q101 qualification further validates stability under automotive thermal and vibration stress profiles.
SZMMBZ5263ELT1G 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZMMBZ5263ELT1G FAQ
1.How can I place an order for SZMMBZ5263ELT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5263ELT1G 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 SZMMBZ5263ELT1G reliable?
The price and inventory of SZMMBZ5263ELT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5263ELT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5263ELT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5263ELT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5263ELT1G?
SZMMBZ5263ELT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5263ELT1G 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 SZMMBZ5263ELT1G?
For technical support, including SZMMBZ5263ELT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5263ELT1G requirements.
6.How does Aetrix verify that SZMMBZ5263ELT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5263ELT1G 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 SZMMBZ5263ELT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5263ELT1G?
All SZMMBZ5263ELT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5263ELT1G, 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 SZMMBZ5263ELT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5263ELT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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