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Diodes Incorporated MMBZ5235BW-7-F
- Part No.:
- MMBZ5235BW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBZ5235BW-7-F.pdf
- Description:
- DIODE ZENER 6.8V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MMBZ5235BW-7-F from Diodes Incorporated is a 6.8 V, 200 mW surface-mount Zener diode in SOT323 package, designed for precision voltage regulation and overvoltage protection in low-power analog circuits. It delivers 5.0 µA reverse leakage at 5.0 V, 5.0 Ω dynamic impedance at 20 mA test current, and operates across –65°C to +150°C.
For engineers reviewing the MMBZ5235BW-7-F datasheet, MMBZ5235BW-7-F pinout, MMBZ5235BW-7-F application, or MMBZ5235BW-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (625°C/W), AEC-Q101 qualification, lead-free/Green compliance, and SOT323 footprint compatibility with automated assembly.
Technical Context
This Zener diode functions as a two-terminal voltage reference device operating in reverse breakdown mode. Its 6.8 V nominal Zener voltage is specified at 20 mA test current (IZT), with tight ±5% tolerance (6.46–7.14 V) and low dynamic impedance (5.0 Ω at 1 kHz), enabling stable regulation under varying load conditions.
Designed for high-reliability applications, it meets AEC-Q101 stress-test requirements and features halogen/antimony-free "Green" molding compound (UL 94V-0), matte tin-plated Alloy 42 leads, and moisture sensitivity level 1 - ensuring robust performance in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 6.8 V - precise reference point for clamping or regulation at typical bias current |
| Zener Voltage Range | 6.46 V to 7.14 V - ±5% tolerance ensures predictable trip point in protection circuits |
| Zener Test Current | 20 mA - standard operating point where voltage and impedance are guaranteed |
| Zener Impedance | 5.0 Ω at 1 kHz - low dynamic resistance minimizes output voltage variation under load transients |
| Power Dissipation | 200 mW - maximum continuous power handling on FR4 board with recommended pad layout |
| Reverse Leakage | 3.0 µA at VR = 5.0 V - low leakage preserves signal integrity in high-impedance bias networks |
| Operating Temp | –65°C to +150°C - wide junction temperature range supports under-hood and industrial deployment |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount case (2.10 mm × 1.30 mm × 0.90 mm), optimized for space-constrained PCBs and compatible with reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode-side reference ground | Connected to lower-potential node in reverse-biased configuration; defines polarity for Zener operation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to higher-potential rail; voltage at this pin is clamped to 6.8 V when reverse biased above breakdown |
| Case / Pin 3 | No internal connection | Non-functional thermal pad; electrically isolated - no circuit role or signal routing required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test standards including HTGB, TCT, and HAST |
| Lead-free & Green compliant | Meets RoHS 2 (2011/65/EU); <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports eco-design mandates |
| SOT323 footprint | Enables high-density placement and compatibility with standard pick-and-place equipment |
| Low thermal resistance | 625°C/W junction-to-ambient enables 200 mW dissipation without external heatsinking on FR4 |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping of LIN bus transceiver I/O lines against ESD and load dump transients. IC Role / Device Role / Timing Role: Bidirectional overvoltage protector placed between transceiver and connector interface. Use Value: Limits transient voltage to ≤7.14 V while drawing <3 µA leakage at 5 V - preserving bus quiescent current budget. | Use Scenario: Providing stable 6.8 V reference for 12-bit ADC biasing in RTD temperature measurement front-end. IC Role / Device Role / Timing Role: Passive voltage reference source for ratiometric sensor excitation and ADC reference scaling. Use Value: Delivers ±5% accuracy and 5 Ω impedance to minimize reference error contribution (<0.1% FS) across –40°C to +125°C. |
| Consumer IoT Power Monitor | Medical Wearable Battery Protection |
Use Scenario: Regulating auxiliary supply for microcontroller reset supervisor IC powered from 9 V battery. IC Role / Device Role / Timing Role: Low-power shunt regulator maintaining clean 6.8 V rail during battery discharge down to 7.5 V. Use Value: Maintains regulation with only 200 mW dissipation and 3 µA leakage at 5 V - extending battery life >12 months. | Use Scenario: Overvoltage cutoff in lithium-polymer battery charging path to prevent cell damage above 4.35 V. IC Role / Device Role / Timing Role: Zener-triggered shutdown element in discrete charge-control comparator circuit. Use Value: Breakdown at 6.46–7.14 V allows precise scaling via resistor divider to detect 4.35 V with ±20 mV tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V8LT1G | Same 6.8 V nominal, SOT23 package, 350 mW rating, 15 Ω Zz at 5 mA | Higher power rating but larger footprint and higher impedance at low current | Select when higher surge tolerance or legacy SOT23 layout reuse is required |
| MMSZ5235ET1G | Same 6.8 V nominal, SOD-123 package, 500 mW rating, 7 Ω Zz at 20 mA | Larger package, higher power, slightly higher impedance than MMBZ5235BW-7-F | Select when thermal margin >200 mW or hand-soldering is needed |
Compared with BZX84-C6V8LT1G and MMSZ5235ET1G, MMBZ5235BW-7-F offers the smallest footprint (SOT323), lowest Zener impedance (5.0 Ω), and AEC-Q101 qualification - making it optimal for space- and reliability-critical automotive and portable designs where 200 mW dissipation suffices.
Availability
MMBZ5235BW-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and consumer IoT power monitoring requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for MMBZ5235BW-7-F 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 the Americas.
The MMBZ52xxBW series belongs to Diodes' high-reliability Zener diode product line, engineered specifically for precision voltage reference and transient suppression in automotive, industrial, and medical applications demanding AEC-Q101 compliance and Green material content.
FAQ
What is the maximum reverse voltage before breakdown for MMBZ5235BW-7-F?
The MMBZ5235BW-7-F exhibits sharp reverse breakdown at 6.46 V minimum and 7.14 V maximum, defined at 20 mA test current (IZT). Below 5.0 V reverse bias, leakage remains ≤3.0 µA - confirming stable non-conducting behavior until reaching the specified Zener range.
Does MMBZ5235BW-7-F require a series current-limiting resistor in all applications?
Yes - as a shunt regulator, it must be used with an external series resistor to limit current during regulation. For example, with a 9 V supply and 6.8 V output, a 100 Ω resistor limits current to ~22 mA, keeping power within the 200 mW rating and preventing thermal runaway.
Is MMBZ5235BW-7-F suitable for ESD protection per IEC 61000-4-2?
No - while it provides basic overvoltage clamping, MMBZ5235BW-7-F is not rated for ESD pulse handling. Its peak surge power is unspecified for 8/20 µs transients; dedicated TVS diodes like DZ23C6V8 are required for IEC 61000-4-2 Level 4 compliance.
How does the SOT323 package affect thermal performance compared to SOD-123?
The SOT323 package has higher thermal resistance (625°C/W vs. ~300°C/W for SOD-123), limiting continuous power dissipation to 200 mW on FR4. This requires careful PCB layout - using minimum 10 mm² copper pour on both sides - to avoid exceeding 150°C junction temperature at full rated power.
MMBZ5235BW-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 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
MMBZ5235BW-7-F FAQ
1.How can I place an order for MMBZ5235BW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5235BW-7-F 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 MMBZ5235BW-7-F reliable?
The price and inventory of MMBZ5235BW-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5235BW-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5235BW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5235BW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5235BW-7-F?
MMBZ5235BW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5235BW-7-F 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 MMBZ5235BW-7-F?
For technical support, including MMBZ5235BW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5235BW-7-F requirements.
6.How does Aetrix verify that MMBZ5235BW-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5235BW-7-F 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 MMBZ5235BW-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5235BW-7-F?
All MMBZ5235BW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5235BW-7-F, 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 MMBZ5235BW-7-F part is unused and in its original packaging.
Return procedure for MMBZ5235BW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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