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onsemi MMBZ5233B
- Part No.:
- MMBZ5233B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5233B.pdf
- Description:
- DIODE ZENER 6V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,898
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Product details
Overview
MMBZ5233B from Fairchild Semiconductor is a 6.0 V ±5% surface-mount zener diode in SOT-23 package, rated for 350 mW power dissipation, with 7.0 Ω dynamic impedance at 20 mA test current and 3.5 µA reverse leakage at 4.8 V. It provides precision voltage regulation in low-power biasing and reference circuits.
For engineers reviewing the MMBZ5233B datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, impedance at specified test current, reverse leakage at rated VR, thermal stability across -55°C to +150°C, and SOT-23 footprint compatibility with automated assembly.
Technical Context
The MMBZ5233B operates as a silicon planar zener diode optimized for stable voltage reference and overvoltage protection in space-constrained designs. Its 6.0 V nominal breakdown voltage is specified at 20 mA test current, with 5% tolerance and temperature coefficient of approximately +0.06%/°C near 25°C.
It exhibits 7.0 Ω dynamic impedance (ZZ) at IZ = 20 mA and 20 Ω knee impedance (ZZK) at IZK = 0.25 mA, supporting predictable clamping behavior in both regulation and transient suppression roles. Forward voltage is ≤0.9 V at IF = 10 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.0 V ±5% at IZ = 20 mA - defines precise DC reference or clamp level |
| Dynamic Impedance ZZ | 7.0 Ω at IZ = 20 mA - ensures minimal output voltage variation under load changes |
| Knee Impedance ZZK | 20 Ω at IZK = 0.25 mA - enables usable regulation even at very low bias currents |
| Reverse Leakage IR | 3.5 µA max at VR = 4.8 V - limits quiescent power loss in high-impedance bias networks |
| Power Dissipation PD | 350 mW at TA = 25°C - sets maximum continuous DC power handling in SOT-23 package |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - supports use as low-drop rectifier or ESD path in dual-direction configurations |
| Operating Temperature | -55°C to +150°C - enables deployment in automotive under-hood and industrial control environments |
Pinout & Package
MMBZ5233B is housed in a standard SOT-23 plastic surface-mount package with three terminals: anode (Pin 1), cathode (Pin 2), and no-connect (Pin 3). Pin 3 is internally unconnected and must remain floating per datasheet connection diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-biased zener operation; forward conduction path when biased positively |
| Pin 2 | Cathode | Connected to higher-potential node during zener breakdown; marked side of package |
| Pin 3 | No-Connect (NC) | Internally unconnected; must not be soldered or tied to any net to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener Voltage Tolerance | Enables tight reference accuracy without post-manufacture trimming in cost-sensitive applications |
| Low Dynamic Impedance (7.0 Ω) | Maintains stable 6.0 V output across ±5 mA load variations in feedback or bias networks |
| SOT-23 Footprint Compatibility | Supports high-density PCB layouts and standard reflow profiles used for 0.65 mm pitch discrete components |
| 150°C Maximum Junction Temperature | Allows reliable operation in thermally demanding environments such as power supply feedback loops and motor drive circuits |
Applications
| Power Supply Feedback Reference | Microcontroller I/O Clamp Protection |
|---|---|
Use Scenario: Used in TL431-based adjustable linear regulators to set output voltage via resistive divider. IC Role / Device Role / Timing Role: Provides stable 6.0 V reference point for error amplifier comparison. Use Value: Tight 5% tolerance and low ZZ ensure <±1% output regulation accuracy across line/load/temperature. | Use Scenario: Placed between MCU GPIO and external sensor interface to limit voltage excursions. IC Role / Device Role / Timing Role: Acts as bidirectional ESD clamp, conducting transients above 6.0 V or below −0.9 V. Use Value: 350 mW rating and fast zener turn-on protect against IEC 61000-4-2 Level 3 (8 kV contact) events. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Biasing |
Use Scenario: Supplies regulated 6.0 V bias to bridge sensor amplifiers in 24 V rail systems. IC Role / Device Role / Timing Role: Functions as shunt regulator, sinking excess current to maintain fixed reference voltage. Use Value: Stable VZ over −40°C to +125°C ensures consistent gain calibration across operating range. | Use Scenario: Generates local 6.0 V reference for LIN transceiver bias in door module PCBs. IC Role / Device Role / Timing Role: Provides isolated, low-noise voltage reference independent of main 12 V supply ripple. Use Value: SOT-23 size and −55°C to +150°C rating meet AEC-Q200 Grade 1 thermal requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V2 | 6.2 V nominal VZ (±5%), 10 Ω ZZ @ 5 mA, same SOT-23 package | Higher VZ shifts reference point; higher ZZ reduces regulation precision at low currents | Select when 6.2 V matches system threshold requirements and lower test current suffices |
| MMBZ5234B | 6.2 V nominal VZ (±5%), 7.0 Ω ZZ @ 20 mA, identical package and thermal specs | 0.2 V higher clamping voltage may affect overvoltage margin in sensitive analog stages | Choose for tighter VZ matching across production lots where 6.2 V is preferred over 6.0 V |
Compared with BZX84-C6V2 and MMBZ5234B, the MMBZ5233B delivers exact 6.0 V regulation with lowest dynamic impedance in its voltage class at 20 mA, making it optimal for precision feedback loops requiring minimal voltage drift under varying load conditions.
Availability
MMBZ5233B is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, and embedded power management systems requiring stable component supply and long-term lifecycle support.
Supply support for MMBZ5233B 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
Fairchild Semiconductor was a U.S.-based designer and manufacturer of analog and discrete semiconductors, acquired by ON Semiconductor in 2016. Its legacy zener portfolio emphasizes reliability, thermal robustness, and manufacturability.
The MMBZ52xxB series was engineered for high-volume, space-constrained applications requiring stable voltage references and transient protection, with focus on automotive, industrial, and consumer power systems.
FAQ
What is the zener voltage tolerance for MMBZ5233B?
The MMBZ5233B has a zener voltage tolerance of ±5% at 20 mA test current, meaning its actual breakdown voltage falls between 5.7 V and 6.3 V under standard conditions. This tolerance is guaranteed across the full operating temperature range and is verified during production testing. The MMBZ5233B maintains this specification without requiring binning or external calibration.
Can MMBZ5233B be used in place of a 5.1 V zener diode?
No, the MMBZ5233B is not a functional substitute for a 5.1 V zener diode due to its 6.0 V nominal zener voltage. Using it in a circuit designed for 5.1 V would raise the regulation or clamp threshold by 0.9 V, potentially causing overvoltage stress on downstream components. The MMBZ5231B (5.1 V) is the correct variant in the same family for that voltage requirement.
What is the maximum reverse leakage current for MMBZ5233B?
The maximum reverse leakage current for MMBZ5233B is 3.5 µA at VR = 4.8 V and TA = 25°C. This value is measured under standardized test conditions and remains within specification up to +125°C junction temperature. The MMBZ5233B's low IR supports energy-efficient bias networks in battery-powered and always-on systems.
Does MMBZ5233B have a built-in capacitor or ESD protection structure?
No, the MMBZ5233B is a basic silicon planar zener diode with no integrated capacitor or specialized ESD structure. Its ESD robustness stems from inherent junction design and packaging, rated per human-body model (HBM) per JEDEC JESD22-A114. For dedicated ESD protection, discrete TVS diodes or purpose-built arrays should be used alongside the MMBZ5233B.
Is MMBZ5233B RoHS compliant and halogen-free?
Yes, the MMBZ5233B manufactured under Fairchild's Rev. A2 specification meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. Lead-free soldering compatibility is confirmed for peak reflow temperatures up to 260°C. The MMBZ5233B carries appropriate marking and documentation to support compliance reporting for end equipment.
MMBZ5233B 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):
- 6 V
- Tolerance:
- ±5%
- Power - Max:
- 350 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:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MMBZ5233B FAQ
1.How can I place an order for MMBZ5233B through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5233B 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 MMBZ5233B reliable?
The price and inventory of MMBZ5233B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5233B is usually 5 days.
3.What payment methods are accepted for MMBZ5233B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5233B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5233B?
MMBZ5233B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5233B 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 MMBZ5233B?
For technical support, including MMBZ5233B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5233B requirements.
6.How does Aetrix verify that MMBZ5233B is sourced from the original manufacturer or authorized distributors?
All MMBZ5233B 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 MMBZ5233B meets industry standards.
7.What is the process for return or replacement of MMBZ5233B?
All MMBZ5233B units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5233B, 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 MMBZ5233B part is unused and in its original packaging.
Return procedure for MMBZ5233B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5233B Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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