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onsemi SZMMBZ5232BLT3G
- Part No.:
- SZMMBZ5232BLT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5232BLT3G.pdf
- Description:
- DIODE ZENER 5.6V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:16,245
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Product details
Overview
SZMMBZ5232BLT3G from onsemi is a 5.6 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 11 Ω dynamic impedance at 20 mA test current and 0.25 μA leakage at 3 V reverse bias - used for voltage regulation and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMMBZ5232BLT3G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, thermal resistance (556 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification, and Pb-free RoHS compliance for automotive and high-reliability embedded systems.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for stable reverse-bias regulation under DC or low-frequency transient conditions. Its 5.6 V nominal Zener voltage exhibits a near-zero temperature coefficient (~0.5 mV/°C) within the −55°C to +150°C junction range.
The SOT-23 package features a no-connection terminal (Pin 2), enabling mechanical stability without electrical function. Thermal performance is specified for both FR-5 (225 mW, 556 °C/W) and alumina substrate (300 mW, 417 °C/W) mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.32–5.88 V @ IZT = 20 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 225 mW on FR-5 board @ 25°C - maximum continuous power before thermal derating begins |
| Zener Impedance (ZZT) | 11 Ω @ IZT = 20 mA - indicates regulation stiffness; lower value enables tighter voltage control under load variation |
| Leakage Current (IR) | 0.25 μA @ VR = 3 V - ensures minimal standby current draw in undervoltage clamp or reference circuits |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - supports robust handling and operation in handheld and automotive environments |
| Junction Temp Range | −65°C to +150°C - enables deployment in extended-temperature industrial and automotive under-hood applications |
| AEC-Q101 Qualified | Yes - certified for automotive electronic systems requiring stress-tested reliability and PPAP documentation |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; polarity indicated by cathode band; UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias regulation; carries forward current during fault or startup |
| 2 | No Connection | Mechanical support only; must remain unconnected in PCB layout to avoid parasitic coupling or shorting |
| 3 | Cathode | Connected to regulated output node; serves as reference voltage source point in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade qualification | SZ-prefix denotes AEC-Q101 qualification and PPAP capability - required for Tier-1 automotive subsystems |
| High-density packaging | SOT-23 footprint (2.9 × 1.3 mm) enables placement on compact PCBs where board area is constrained |
| Low-leakage regulation | 0.25 μA max reverse leakage at 3 V ensures minimal quiescent current in battery-powered voltage monitors |
| Pb-free & RoHS compliance | Fully compliant with EU RoHS Directive and halogen-free/BFR-free requirements for green manufacturing |
| ESD-hardened construction | Class 3 HBM (>16 kV) rating eliminates need for external ESD protection in consumer handheld interfaces |
Applications
| Smartphone Power Management | Automotive Body Control Module |
|---|---|
Use Scenario: Voltage clamping of USB interface lines and SIM card supply rails against ESD transients and overvoltage events. IC Role / Device Role / Timing Role: Shunt Zener regulator providing precise 5.6 V reference and transient suppression at signal/power rail nodes. Use Value: Prevents latch-up and damage to baseband ICs while maintaining <0.25 μA standby leakage to extend battery life. |
Use Scenario: Regulating sensor supply voltage (e.g., ambient light, door position) in 12 V vehicle electrical systems with wide input variation. IC Role / Device Role / Timing Role: Two-terminal voltage reference stabilizing microcontroller analog inputs and ADC references across temperature extremes. Use Value: Maintains ±5% regulation accuracy from −40°C to +125°C ambient, meeting AEC-Q100 Grade 2 requirements. |
| Industrial IoT Sensor Node | Medical Wearable Charger Circuit |
Use Scenario: Providing stable bias for low-power op-amps and comparators in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Precision shunt reference establishing accurate threshold voltages for wake-up comparators and ADC references. Use Value: Enables sub-1% measurement accuracy over full temperature range due to low ZZT (11 Ω) and tight VZ tolerance. |
Use Scenario: Overvoltage protection for Li-ion battery charging circuitry during adapter hot-plug or surge events. IC Role / Device Role / Timing Role: Fast-acting clamp limiting charger IC input to 5.88 V maximum during transient overvoltage. Use Value: Survives >16 kV HBM ESD strikes without degradation, eliminating need for secondary TVS devices in compact wearable form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5232BLT3G | Same Zener voltage (5.32–5.88 V), identical SOT-23 package and pinout, but not AEC-Q101 qualified | Lacks automotive qualification and PPAP support; suitable for commercial-grade portable electronics only | Select when automotive reliability certification is unnecessary and cost sensitivity outweighs qualification requirements |
| SZMMBZ5232BLT1G | Identical electrical specs and AEC-Q101 qualification, but supplied in 3,000-piece tape-and-reel vs. 10,000-piece for SZMMBZ5232BLT3G | Same functional performance; differs only in packaging quantity and associated logistics cost structure | Select when smaller batch procurement or prototype validation is preferred over volume production efficiency |
Compared with MMBZ5232BLT3G, SZMMBZ5232BLT3G adds AEC-Q101 qualification and PPAP capability for automotive use, while SZMMBZ5232BLT1G offers identical specs in smaller reel size - enabling design reuse across commercial, automotive, and prototyping supply chains without circuit or layout changes.
Availability
SZMMBZ5232BLT3G is available at Aetrix Electronics and suitable for smartphone power management, automotive body control modules, and industrial IoT sensor nodes requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SZMMBZ5232BLT3G 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 supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxBLT1G/SZMMBZ52xxBLT1G series was designed specifically for space-constrained voltage regulation and overvoltage protection in portable, automotive, and high-density PCB applications - emphasizing low leakage, high ESD immunity, and AEC-Q101 compliance.
FAQ
What is the nominal Zener voltage and tolerance of SZMMBZ5232BLT3G?
The SZMMBZ5232BLT3G has a nominal Zener voltage of 5.6 V with a tolerance of ±5%, corresponding to a guaranteed range of 5.32 V to 5.88 V at 20 mA test current (IZT). This specification is validated per onsemi's Electrical Characteristics table and applies across the full operating temperature range of −65°C to +150°C junction temperature.
Is SZMMBZ5232BLT3G suitable for automotive applications?
Yes, SZMMBZ5232BLT3G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including body control modules, infotainment power rails, and sensor supply regulation. The "SZ" prefix explicitly denotes compliance with automotive-specific site and process controls, unlike the standard "MMBZ" variants.
What is the thermal resistance and power derating behavior of SZMMBZ5232BLT3G?
SZMMBZ5232BLT3G has a junction-to-ambient thermal resistance (RJA) of 556 °C/W on FR-5 board. Its 225 mW power rating derates linearly at 1.8 mW/°C above 25°C ambient, reaching zero dissipation at approximately 153°C ambient - consistent with its −65°C to +150°C junction temperature range.
Does SZMMBZ5232BLT3G have a no-connect pin, and how should it be handled in PCB layout?
Yes, Pin 2 of SZMMBZ5232BLT3G is a no-connect terminal per onsemi's marking diagram and mechanical outline. It must remain unconnected on the PCB - neither tied to ground nor routed - to prevent unintended parasitic paths or solder bridging that could compromise regulation stability or ESD performance.
How does the ESD rating of SZMMBZ5232BLT3G compare to standard commercial Zeners?
SZMMBZ5232BLT3G achieves Class 3 ESD rating (>16 kV) per Human Body Model, exceeding typical commercial Zeners (often Class 2, ≤8 kV). This higher rating is achieved through process-level hardening and enables direct integration into ESD-prone interfaces like USB ports and automotive sensor harnesses without additional protection components.
SZMMBZ5232BLT3G 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):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 11 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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)
SZMMBZ5232BLT3G FAQ
1.How can I place an order for SZMMBZ5232BLT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5232BLT3G 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 SZMMBZ5232BLT3G reliable?
The price and inventory of SZMMBZ5232BLT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5232BLT3G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5232BLT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5232BLT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5232BLT3G?
SZMMBZ5232BLT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5232BLT3G 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 SZMMBZ5232BLT3G?
For technical support, including SZMMBZ5232BLT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5232BLT3G requirements.
6.How does Aetrix verify that SZMMBZ5232BLT3G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5232BLT3G 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 SZMMBZ5232BLT3G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5232BLT3G?
All SZMMBZ5232BLT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5232BLT3G, 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 SZMMBZ5232BLT3G part is unused and in its original packaging.
Return procedure for SZMMBZ5232BLT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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