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Diodes Incorporated MMBZ5233B-7
- Part No.:
- MMBZ5233B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5233B-7.pdf
- Description:
- DIODE ZENER 6V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,865
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Product details
Overview
MMBZ5233B-7 from Diodes Incorporated is a 350mW surface-mount Zener diode with nominal zener voltage of 6.0V (5.70–6.30V range at 20mA test current), 7Ω maximum zener impedance at 1kHz, and 5.0µA reverse leakage at 3.5V. It operates from −65°C to +150°C and is used for precision voltage regulation and overvoltage protection in low-power analog signal conditioning circuits.
For engineers reviewing the MMBZ5233B-7 datasheet, MMBZ5233B-7 pinout, MMBZ5233B-7 application, or MMBZ5233B-7 equivalent, this part serves as a compact, RoHS-compliant, SOT23-packaged reference voltage source requiring stable 6V clamping with low dynamic impedance and tight tolerance in space-constrained PCB layouts.
Technical Context
This Zener diode employs planar die construction for consistent breakdown characteristics and low thermal resistance (357°C/W on FR-4). Its 6.0V nominal zener voltage is specified at IZT = 20mA, with guaranteed VZ tolerance ±5% and low ZZT ≤ 7Ω ensuring minimal regulation error under varying load currents.
The device exhibits 5.0µA max reverse leakage at VR = 3.5V and supports operation across the full industrial temperature range (−65°C to +150°C). Its SOT23 package enables automated placement and reflow compatibility while maintaining JEDEC-compliant reliability for non-automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.0V (5.70–6.30V at 20mA); provides stable reference for 5V–6.3V rail monitoring and clamping |
| Power Dissipation | 350mW on FR-4 PCB; supports continuous regulation in low-power sensor interfaces and bias networks |
| Zener Impedance | 7Ω max at 1kHz/20mA; ensures <±30mV output variation across 5–25mA load changes |
| Reverse Leakage | 5.0µA max at 3.5V; minimizes standby current in battery-backed voltage supervisors |
| Operating Temperature | −65°C to +150°C; suitable for under-hood and industrial control environments without derating |
| Package | SOT23; 3-pin surface-mount footprint compatible with standard pick-and-place and reflow processes |
Pinout & Package
MMBZ5233B-7 is housed in a standard SOT23 plastic package with matte tin-plated alloy 42 leadframe. The device has three terminals: anode, cathode, and unused (floating) third terminal - consistent with SOT23 Zener diode configuration where only two pins are electrically active.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; forward-biased during normal conduction |
| Pin 2 | Cathode | Connected to higher-potential node; reverse-biased during zener regulation |
| Pin 3 | No Connect | Internally unconnected; no electrical function or thermal path contribution |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight VZ tolerance (±5%) and repeatable breakdown behavior across production lots |
| 350mW power rating on FR-4 | Supports sustained 20mA regulation without external heatsinking in standard PCB layouts |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900ppm Br+Cl and <1000ppm Sb; qualifies for green product labeling |
| Moisture Sensitivity Level 1 | Eliminates bake requirements prior to reflow; compatible with standard J-STD-020 handling |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Regulating reference voltage for 12-bit ADC front-end in temperature transmitters. IC Role / Device Role / Timing Role: Zener diode providing stable 6.0V reference to op-amp bias network and ADC reference divider. Use Value: 7Ω dynamic impedance limits reference drift to <±25mV over 10–20mA supply current variation, improving measurement accuracy by 0.2 LSB. |
Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Low-capacitance shunt protector limiting VBUS to 6.3V during ESD or load-dump events. Use Value: 5.0µA leakage at 3.5V prevents false triggering of USB enumeration while enabling fast 6V clamping response. |
| Low-Power Microcontroller Reset Circuit | Automotive Cabin Control Panel Bias Network |
Use Scenario: Generating clean reset threshold for 3.3V MCU using resistor-divider + Zener clamp. IC Role / Device Role / Timing Role: Precision 6.0V zener establishing accurate 1.2V reset threshold via resistive scaling. Use Value: ±5% VZ tolerance ensures reset assertion within 1.14–1.26V across temperature, meeting ISO 11898-3 startup timing. |
Use Scenario: Stabilizing 5V auxiliary rail for touch controller and LED driver ICs in infotainment bezel. IC Role / Device Role / Timing Role: Secondary voltage clamp protecting downstream logic from 12V supply ripple and load dump spikes. Use Value: 350mW rating sustains 15ms 20V transients at 10mA peak current without degradation, per ISO 7637-2 Pulse 1/2a. |
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 (Nexperia) | 6.2V nominal, ±5% tolerance, 80Ω max ZZT, 300mW rating | Higher dynamic impedance reduces regulation accuracy in precision references | Select when cost sensitivity outweighs voltage accuracy and low-Z requirement |
| MMBZ5234B-7 (Diodes Inc.) | 6.2V nominal, same package and construction, 7Ω max ZZT, 5.0µA IR at 4.0V | 0.2V higher clamping voltage shifts reference point; identical thermal and reliability specs | Choose for designs needing margin above 6.0V or compatibility with legacy 6.2V schematics |
Compared with BZX84-C6V2 and MMBZ5234B-7, MMBZ5233B-7 delivers tighter 6.0V regulation with lower dynamic impedance-critical for high-resolution analog sensing-while sharing identical SOT23 footprint and JEDEC reliability, making it optimal for new designs prioritizing accuracy over minor voltage offset.
Availability
MMBZ5233B-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection circuits, and low-power microcontroller reset networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMBZ5233B-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This device belongs to the MMBZ52xxB series of 350mW Zener diodes designed specifically for high-reliability, space-constrained voltage regulation and protection in consumer, industrial, and computing applications.
FAQ
What is the maximum reverse voltage (VR) at which MMBZ5233B-7 guarantees ≤5.0µA leakage?
The datasheet specifies 5.0µA maximum reverse leakage current at VR = 3.5V. This value is measured under steady-state DC conditions at TA = +25°C and defines the upper bound of off-state current before significant zener conduction begins. It remains valid across the full operating temperature range.
Can MMBZ5233B-7 be used in automotive applications?
MMBZ5233B-7 is not qualified to AEC-Q101. For automotive use, Diodes offers the Q-suffix variant MMBZ5233BQ-7-F, which undergoes additional stress testing, PPAP documentation, and is manufactured in IATF 16949-certified facilities. Standard MMBZ5233B-7 is intended for industrial and commercial applications only.
What is the thermal resistance junction-to-ambient (RθJA) for MMBZ5233B-7 on FR-4 PCB?
The thermal resistance is 357°C/W when mounted on a standard FR-4 printed circuit board with the recommended pad layout per Diodes' package outline documentation. This value assumes natural convection cooling and no copper pour or thermal vias; adding thermal relief pads reduces RθJA by up to 25%.
How does the 7Ω zener impedance affect regulation performance in a 10mA load circuit?
With 7Ω dynamic impedance, a 5mA change in zener current produces only ~35mV shift in regulated voltage (ΔV = ZZT × ΔI). In a 10mA nominal load, this ensures output stability within ±35mV across ±2.5mA load variation-sufficient for 12-bit ADC references and comparator thresholds requiring <0.5% error.
MMBZ5233B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MMBZ5233B-7 FAQ
1.How can I place an order for MMBZ5233B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5233B-7 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-7 reliable?
The price and inventory of MMBZ5233B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5233B-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5233B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5233B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5233B-7?
MMBZ5233B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5233B-7 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-7?
For technical support, including MMBZ5233B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5233B-7 requirements.
6.How does Aetrix verify that MMBZ5233B-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5233B-7 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-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5233B-7?
All MMBZ5233B-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5233B-7, 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-7 part is unused and in its original packaging.
Return procedure for MMBZ5233B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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