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Diodes Incorporated MMBZ5233BW-7
- Part No.:
- MMBZ5233BW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBZ5233BW-7.pdf
- Description:
- DIODE ZENER 6V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,514
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Product details
Overview
MMBZ5233BW-7 from Diodes Incorporated is a 6.0 V, 200 mW surface-mount Zener diode in SOT323 package, with ±5% tolerance (5.70–6.30 V), 7.0 Ω dynamic impedance at 20 mA test current, and ≤5.0 μA reverse leakage at 3.5 V. It provides precision voltage regulation in low-power biasing and reference circuits for automotive ECUs and industrial sensor signal conditioning.
For engineers reviewing the MMBZ5233BW-7 datasheet, MMBZ5233BW-7 pinout, MMBZ5233BW-7 application, or MMBZ5233BW-7 equivalent, key selection criteria include zener voltage tolerance, low dynamic impedance at nominal test current, thermal resistance (625 °C/W), AEC-Q101 qualification, and SOT323 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or supply conditions. Its 200 mW power rating and 625 °C/W junction-to-ambient thermal resistance define safe operating limits on standard FR4 PCBs with recommended pad layout.
The device exhibits 7.0 Ω zener impedance at IZT = 20 mA and <1600 Ω at knee current (IZK = 0.25 mA), enabling predictable regulation down to microamp-level currents. It is rated for operation from −65 °C to +150 °C and qualified to AEC-Q101 for automotive reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.0 V nominal, 5.70–6.30 V range at IZT = 20 mA - defines regulated output voltage tolerance in reference designs |
| Power Dissipation (PD) | 200 mW at TA = 25 °C - sets maximum continuous DC power handling on standard PCB |
| Zener Impedance (ZZT) | 7.0 Ω at IZT = 20 mA - determines regulation stiffness and AC ripple rejection capability |
| Reverse Leakage (IR) | ≤5.0 μA at VR = 3.5 V - ensures minimal quiescent current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 625 °C/W - quantifies temperature rise per watt on FR4 with specified pad layout |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive and industrial ambient environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SOT323 - 3-terminal plastic surface-mount package with gull-wing leads, 0.65 mm pitch, 2.10 mm × 1.30 mm footprint, and 0.30 mm typical height. Compatible with reflow soldering and automated pick-and-place.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to circuit ground or lower-potential node when used in reverse-biased regulation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Provides stable 6.0 V reference relative to anode; carries full zener current in regulation |
| Collector / Heat Sink (Pin 3) | Internal die substrate connection / thermal path | Electrically tied to cathode in this Zener structure; enhances thermal dissipation via PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, HTRB, and ESD robustness |
| SOT323 package | Enables high-density PCB layouts and compatibility with standard 0.65 mm pitch SMT processes |
| Green, halogen-free construction | Meets RoHS 2 and JEDEC J-STD-020D Level 1 moisture sensitivity without bromine/chlorine/antimony |
| Low zener impedance | 7.0 Ω at 20 mA enables tight voltage regulation under moderate load variation |
| Stable 6.0 V reference | ±5% tolerance and low tempco support accurate analog sensing and ADC reference scaling |
Applications
| Automotive Sensor Biasing | Industrial Analog Signal Conditioning |
|---|---|
Use Scenario: Providing stable 6.0 V bias to bridge-based pressure sensors in engine control modules. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt voltage reference for sensor excitation circuitry. Use Value: Maintains sensor output linearity over −40 °C to +125 °C ambient with <5 μA leakage minimizing offset drift. | Use Scenario: Generating a clean 6.0 V reference for 12-bit SAR ADCs in programmable logic controllers. IC Role / Device Role / Timing Role: Passive voltage reference source for analog front-end signal scaling and offset correction. Use Value: 7.0 Ω dynamic impedance ensures <1 LSB error contribution from reference variation under 1 mA load changes. |
| USB Port Overvoltage Protection | Low-Power Microcontroller Reset Circuit |
Use Scenario: Clamping transient surges on 5 V USB VBUS lines using series resistor + Zener topology. IC Role / Device Role / Timing Role: Shunt protection element limiting voltage to 6.0 V during ESD or load-dump events. Use Value: 200 mW rating and 625 °C/W RθJA allow brief 100 ms surge absorption without thermal runaway. | Use Scenario: Generating a precise reset threshold for 3.3 V microcontrollers using resistor divider + Zener clamp. IC Role / Device Role / Timing Role: Reference voltage source defining brown-out detection level in power-on reset circuitry. Use Value: ±5% VZ tolerance ensures reliable reset assertion at 2.9–3.1 V supply levels across temperature. |
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-C6V2-7-F | 6.2 V nominal, ±5% tolerance, 10 Ω ZZT at 5 mA, SOT23 package | Higher voltage, lower test current, larger footprint - less suitable for 6.0 V precision references | Select only if 6.2 V target and SOT23 board space are acceptable |
| MMSZ5233BS-7-F | 6.0 V nominal, ±5%, 7.0 Ω ZZT at 20 mA, SOD-323 package, same electrical specs | Same regulation performance but different package outline - requires PCB land pattern change | Drop-in electrical replacement; verify SOD-323 pad layout and thermal relief design |
Compared with BZX84-C6V2-7-F and MMSZ5233BS-7-F, MMBZ5233BW-7 offers identical 6.0 V regulation and impedance but in the smaller SOT323 package, enabling higher board density while maintaining AEC-Q101 compliance for automotive use cases.
Availability
MMBZ5233BW-7 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog signal conditioning, and USB port overvoltage protection requiring stable component supply and AEC-Q101 assurance.
Supply support for MMBZ5233BW-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.
The MMBZ52xxBW series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for precision voltage reference and overvoltage clamping in harsh-environment electronic control units.
FAQ
What is the maximum continuous power dissipation for MMBZ5233BW-7 at 85°C ambient?
At 85°C ambient, derating begins at 25°C per Figure 1. With 625 °C/W RθJA, the allowable power drops linearly: PD(85°C) = 200 mW × (1 − (85 − 25)/125) = 80 mW. This assumes FR4 PCB with Diodes' recommended AP02001 pad layout.
Is MMBZ5233BW-7 suitable for bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-bias regulation. Its forward voltage is ~0.9 V at 10 mA, but it lacks symmetric clamping characteristics or specified ESD ratings like IEC 61000-4-2. Use dedicated TVS diodes such as D3V3M1U2UP for bidirectional ESD protection.
How does the SOT323 package affect thermal performance versus SOD-323?
SOT323 has slightly lower thermal resistance than SOD-323 due to its exposed heat sink pin (Pin 3) tied to the cathode. Measured RθJA is 625 °C/W for SOT323 vs. ~650–680 °C/W for SOD-323 on identical PCBs, enabling ~5% higher power handling at same ambient temperature.
Can MMBZ5233BW-7 replace MMBZ5234BW-7 in a 6.2 V reference design?
No - MMBZ5233BW-7 is rated 6.0 V (5.70–6.30 V), while MMBZ5234BW-7 is 6.2 V (5.89–6.51 V). Substituting introduces up to 3.3% systematic error in reference voltage. For 6.2 V systems, retain MMBZ5234BW-7 or select a tighter-tolerance alternative like BZX84-B6V2.
MMBZ5233BW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 6 V
- Tolerance:
- ±5%
- Power - Max:
- 200 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-323
MMBZ5233BW-7 FAQ
1.How can I place an order for MMBZ5233BW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5233BW-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 MMBZ5233BW-7 reliable?
The price and inventory of MMBZ5233BW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5233BW-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5233BW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5233BW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5233BW-7?
MMBZ5233BW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5233BW-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 MMBZ5233BW-7?
For technical support, including MMBZ5233BW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5233BW-7 requirements.
6.How does Aetrix verify that MMBZ5233BW-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5233BW-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 MMBZ5233BW-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5233BW-7?
All MMBZ5233BW-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5233BW-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 MMBZ5233BW-7 part is unused and in its original packaging.
Return procedure for MMBZ5233BW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5233BW-7 Tags
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