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onsemi SZMMBZ5233BLT1G
- Part No.:
- SZMMBZ5233BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5233BLT1G.pdf
- Description:
- DIODE ZENER 6V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:15,049
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Product details
Overview
SZMMBZ5233BLT1G from onsemi is a 6.0 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 7 Ω dynamic impedance at 20 mA test current and 5 µA leakage at 3.5 V reverse bias. It provides precision voltage regulation in space-constrained DC power rails for portable electronics and automotive control modules.
For engineers reviewing the SZMMBZ5233BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W), AEC-Q101 qualification, ESD robustness (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage across variable load currents by conducting reverse-biased Zener breakdown. Its 6.0 V nominal Zener voltage exhibits low temperature coefficient near zero crossing, enabling stable reference performance over −65°C to +150°C junction range.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode) and supports automated placement with Pb-free, halogen-free construction compliant with RoHS and AEC-Q101 for automotive use cases requiring PPAP documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.0 V nominal, 5.7–6.3 V range at 20 mA - ensures tight regulation tolerance for 5 V rail clamping and reference generation |
| Power Dissipation (PD) | 225 mW on FR-5 board - defines maximum continuous power handling without derating below 25°C ambient |
| Zener Impedance (ZZT) | 7 Ω at IZT = 20 mA - indicates low AC impedance for effective noise suppression in feedback paths |
| Leakage Current (IR) | 5 µA max at VR = 3.5 V - guarantees minimal standby current draw in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct integration into handheld and automotive interfaces without external protection |
| Junction Temp Range | −65°C to +150°C - supports operation in under-hood automotive environments and industrial edge nodes |
| Package | SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm - fits 0.65 mm pitch layouts and enables >10,000 units/in² component density |
Pinout & Package
SOT-23 plastic surface-mount package with void-free thermosetting case, corrosion-resistant finish, and UL 94 V-0 flammability rating. Maximum soldering temperature is 260°C for 10 seconds. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential side of regulated node; must be tied to ground or return path in shunt configuration |
| Pin 2 | No Connection | Internally unconnected; no PCB trace or pad required - eliminates routing conflict in dense layouts |
| Pin 3 | Cathode | Connected to higher-potential side (e.g., input rail); carries full Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control units and body electronics with full PPAP support |
| 225 mW Power Rating | Enables compact voltage clamping without heatsinking in 0.5 W-class power supply feedback networks |
| 7 Ω Dynamic Impedance | Minimizes output voltage variation under transient load steps in precision analog references |
| Class 3 ESD Robustness | Eliminates need for discrete TVS diodes in USB, CAN, and sensor interface protection circuits |
| Pb-Free / RoHS Compliant | Meets global environmental compliance requirements for consumer, industrial, and automotive end products |
Applications
| Automotive Body Control Module | Portable Medical Sensor Node |
|---|---|
Use Scenario: Regulating 5 V microcontroller supply rail in door module exposed to load dump transients. IC Role / Device Role / Timing Role: Shunt voltage clamp protecting MCU VDD against overvoltage spikes up to 16 V. Use Value: Prevents brownout resets during alternator load dump while consuming only 5 µA standby current. | Use Scenario: Providing stable 6 V reference for ADC front-end in battery-powered pulse oximeter. IC Role / Device Role / Timing Role: Precision Zener reference source for ratiometric sensor excitation and signal conditioning. Use Value: Delivers ±5% voltage accuracy over −20°C to +70°C operating range with <7 Ω output impedance. |
| Industrial PLC I/O Protection | Smartphone Charger Feedback Loop |
Use Scenario: Overvoltage protection on 24 V digital input channel subject to field wiring faults. IC Role / Device Role / Timing Role: Clamp diode limiting input voltage to safe levels for optocoupler and logic interface ICs. Use Value: Withstands >16 kV HBM ESD events and dissipates 225 mW without derating at 50°C ambient. | Use Scenario: Secondary-side voltage sensing in flyback converter feedback network. IC Role / Device Role / Timing Role: Zener-based error amplifier reference setting output voltage accuracy and stability. Use Value: Maintains ±1% output regulation across line/load variations due to low 7 Ω dynamic impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V2 | 6.2 V nominal, ±5% tolerance; 300 mW rating; SOT-23 package; non-AEC-Q101 | Lacks automotive qualification and has higher Zener voltage - less suitable for 5 V rail clamping | Select when cost sensitivity outweighs AEC-Q101 requirement and 6.2 V vs. 6.0 V offset is acceptable |
| SZMMBZ5232BLT1G | 5.6 V nominal, ±5% tolerance; identical package, power, and qualification | Lower Zener voltage - better suited for 3.3 V system protection or biasing | Choose for designs requiring tighter margin below 5 V logic thresholds or lower leakage at reduced bias |
Compared with BZX84-C6V2 and SZMMBZ5232BLT1G, SZMMBZ5233BLT1G offers the optimal 6.0 V Zener point for 5 V rail stabilization, AEC-Q101 compliance for automotive use, and lowest dynamic impedance (7 Ω) in its voltage class - making it preferred for precision reference and high-reliability clamping.
Availability
SZMMBZ5233BLT1G is available at Aetrix Electronics and suitable for automotive body electronics, portable medical devices, industrial PLC I/O modules, and smartphone power management systems requiring stable component supply and long-term lifecycle assurance.
Supply support for SZMMBZ5233BLT1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications, with leadership in power management, analog, sensors, and connectivity.
The MMBZ52xxBLT1G/SZMMBZ52xxBLT1G series was designed specifically for space-constrained voltage regulation and protection in high-density portable and automotive electronics, emphasizing AEC-Q101 reliability, low-profile packaging, and robust ESD performance.
FAQ
What is the Zener voltage tolerance of SZMMBZ5233BLT1G?
The SZMMBZ5233BLT1G has a Zener voltage tolerance of ±5% around its nominal 6.0 V rating, resulting in a guaranteed range of 5.7 V to 6.3 V at 20 mA test current. This tolerance is specified per the onsemi datasheet revision 16 (July 2024) and applies across the full operating temperature range of −65°C to +150°C. The SZMMBZ5233BLT1G maintains this specification under standard FR-5 board mounting conditions.
Is SZMMBZ5233BLT1G qualified for automotive applications?
Yes, SZMMBZ5233BLT1G is AEC-Q101 qualified and PPAP capable, as confirmed in the official onsemi datasheet. The "SZ" prefix explicitly denotes automotive-grade variants meeting stringent reliability, traceability, and process control requirements. It is approved for use in body electronics, infotainment, and powertrain subsystems where extended temperature operation and failure mode analysis are mandatory. The SZMMBZ5233BLT1G meets all stress tests including HTOL, TCT, and ESD per AEC-Q101 Rev H.
What is the pin configuration of SZMMBZ5233BLT1G?
The SZMMBZ5233BLT1G uses Style 8 pinout in the SOT-23 package: Pin 1 is Anode, Pin 2 is No Connection (unbonded, not electrically active), and Pin 3 is Cathode. This configuration is documented in the mechanical drawings and electrical characteristics table of the onsemi datasheet. The cathode is marked by a polarity band on the package body, and Pin 2 must remain unconnected on the PCB layout to avoid unintended shorts or parasitic coupling.
How does the dynamic impedance of SZMMBZ5233BLT1G affect regulation performance?
The SZMMBZ5233BLT1G exhibits a maximum dynamic impedance (ZZT) of 7 Ω at 20 mA Zener test current, which directly determines how tightly it regulates voltage under varying load conditions. Lower impedance means smaller output voltage deviation during current transients - critical for stable reference generation in ADCs and feedback loops. This value is measured at 1 kHz with 0.1×DC bias and is validated across temperature, making the SZMMBZ5233BLT1G suitable for precision analog applications where ripple rejection matters.
Can SZMMBZ5233BLT1G replace MMBZ5233BLT1G in existing designs?
Yes, SZMMBZ5233BLT1G is a direct functional replacement for MMBZ5233BLT1G with identical electrical specifications, SOT-23 package, and pinout. The "SZ" prefix adds AEC-Q101 qualification, enhanced process controls, and automotive-specific change management - but does not alter Zener voltage, impedance, leakage, or thermal characteristics. No PCB or schematic changes are needed when upgrading to SZMMBZ5233BLT1G, and the SZMMBZ5233BLT1G maintains full compatibility with legacy MMBZ5233BLT1G footprints and bill-of-materials.
SZMMBZ5233BLT1G 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):
- 6 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3.5 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)
SZMMBZ5233BLT1G FAQ
1.How can I place an order for SZMMBZ5233BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5233BLT1G 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 SZMMBZ5233BLT1G reliable?
The price and inventory of SZMMBZ5233BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5233BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5233BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5233BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5233BLT1G?
SZMMBZ5233BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5233BLT1G 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 SZMMBZ5233BLT1G?
For technical support, including SZMMBZ5233BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5233BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5233BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5233BLT1G 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 SZMMBZ5233BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5233BLT1G?
All SZMMBZ5233BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5233BLT1G, 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 SZMMBZ5233BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5233BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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