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Diodes Incorporated MMBZ5234BW-7-F
- Part No.:
- MMBZ5234BW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBZ5234BW-7-F.pdf
- Description:
- DIODE ZENER 6.2V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MMBZ5234BW-7-F from Diodes Incorporated is a 6.2 V, 200 mW surface-mount Zener diode in SOT323 package, rated for 20 mA test current, with 7.0 Ω zener impedance at 20 mA and 5.0 μA reverse leakage at 4.0 V, used for precision voltage regulation and overvoltage protection in low-power analog and digital supply rails.
For engineers reviewing the MMBZ5234BW-7-F datasheet, MMBZ5234BW-7-F pinout, MMBZ5234BW-7-F application, or MMBZ5234BW-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 operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. It delivers 6.2 V nominal regulation with ±5% tolerance (5.89–6.51 V) at 20 mA, and exhibits low dynamic impedance (7.0 Ω @ 20 mA) for minimal output voltage variation during transient current changes.
Designed for high-reliability applications, it meets AEC-Q101 stress-test requirements and features a halogen- and antimony-free "Green" molding compound (UL 94V-0), matte tin-plated terminals, and moisture sensitivity level 1 - enabling robust performance across automotive, industrial, and consumer electronics environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 6.2 V nominal, 5.89–6.51 V range at 20 mA - ensures tight regulation for 5 V/6 V rail clamping and reference generation |
| Power Dissipation | 200 mW maximum - limits continuous thermal load on PCB; derates linearly above +25°C ambient |
| Zener Impedance | 7.0 Ω @ 20 mA - provides low AC impedance for stable voltage under small-signal ripple or noise |
| Reverse Leakage | 5.0 μA @ 4.0 V - guarantees minimal quiescent current draw in standby or low-power monitoring circuits |
| Thermal Resistance | 625 °C/W junction-to-ambient - defines temperature rise per watt on standard FR4 board with recommended pad layout |
| Package | SOT323 - 3-pin surface-mount outline (2.10 × 1.30 × 0.90 mm) compatible with fine-pitch reflow assembly |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount case with three terminals (anode, cathode, and internal connection tied to cathode). Dimensions: 2.10 mm length × 1.30 mm width × 0.90 mm height; weight ≈ 0.006 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node; reverse-biased during Zener operation |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; defines regulated output voltage referenced to anode |
| Case / Pin 3 | Internal cathode tie | Electrically common with Pin 2; provides mechanical stability and thermal path in SOT323 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Lead-free & Green compliant | Meets RoHS 2 (2011/65/EU); <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports eco-design and end-of-life recycling |
| Low zener impedance | 7.0 Ω at 20 mA enables stable regulation under dynamic load shifts in sensor biasing and ADC reference circuits |
| SOT323 footprint | Enables high-density PCB layouts and compatibility with automated pick-and-place and reflow processes |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping on LIN bus transceiver supply lines to prevent overvoltage damage during load dump events. IC Role / Device Role: Zener-based shunt regulator protecting 5 V microcontroller I/O and transceiver VCC. Use Value: 6.2 V breakdown ensures safe clamping below 6.5 V absolute max rating of connected ICs while drawing <5 μA leakage at normal operating voltage. | Use Scenario: Providing stable 6.2 V reference for bridge amplifier offset nulling in strain-gauge measurement systems. IC Role / Device Role: Precision voltage reference source for op-amp bias networks requiring low drift and low noise. Use Value: 7.0 Ω impedance minimizes reference voltage shift under varying sensor excitation currents, improving measurement repeatability. |
| Consumer USB-C Power Delivery Monitor | Medical Wearable Battery Management |
Use Scenario: Overvoltage detection on VBUS sense line in USB-C PD controller auxiliary monitoring circuitry. IC Role / Device Role: Threshold detector triggering fault logic when input exceeds 6.2 V during abnormal adapter insertion. Use Value: Tight ±5% tolerance allows reliable discrimination between valid 5 V (±5%) and hazardous >6.5 V conditions without false triggers. | Use Scenario: Low-current voltage clamp on lithium-ion battery cell monitor IC supply rail to prevent latch-up during charging transients. IC Role / Device Role: Protective shunt element limiting rail voltage to 6.2 V during fast-charge surge events. Use Value: 200 mW power rating and 625 °C/W thermal resistance enable self-limiting behavior without external heatsinking in space-constrained wearable PCBs. |
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 (ON Semiconductor) | Same 6.2 V nominal, SOT23 package, 350 mW rating, higher 10 Ω ZZT | Larger footprint; higher power handling but less precise regulation due to higher impedance | Select when higher surge tolerance is needed and board space permits SOT23 |
| MMSZ5234T1G (onsemi) | Identical 6.2 V spec, SOD-123 package, 500 mW rating, 10 Ω ZZT, non-AEC-Q101 | Higher power, larger package, no automotive qualification - suitable for cost-sensitive industrial use | Choose for non-automotive designs where thermal margin >200 mW is required |
Compared with BZX84-C6V2 and MMSZ5234T1G, MMBZ5234BW-7-F offers tighter voltage tolerance, lower dynamic impedance, AEC-Q101 qualification, and smallest footprint - making it optimal for space-constrained, automotive-grade, and precision-regulation applications.
Availability
MMBZ5234BW-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and consumer USB-C power delivery monitors requiring stable component supply, consistent parametric performance, and full traceability.
Supply support for MMBZ5234BW-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 North America.
The MMBZ52xxBW series belongs to Diodes' precision Zener diode product line, engineered specifically for compact, high-reliability voltage regulation and protection in automotive, industrial, and portable electronics where space, thermal efficiency, and regulatory compliance are critical.
FAQ
What is the maximum reverse voltage this Zener diode can withstand before breakdown?
The MMBZ5234BW-7-F has a nominal zener voltage of 6.2 V with a guaranteed range of 5.89 V to 6.51 V at 20 mA test current. Its reverse breakdown occurs within this band; it is not rated for sustained operation above 6.51 V. The device is not designed for avalanche or transient suppression beyond its specified zener characteristics.
Is this part suitable for use in automotive applications?
Yes - MMBZ5234BW-7-F is explicitly qualified to AEC-Q101 standards, covering stress tests such as high-temperature reverse bias, temperature cycling, and ESD. Its Green/lead-free construction and SOT323 package meet automotive PCB assembly and environmental requirements.
How does the SOT323 package affect thermal performance?
With a thermal resistance of 625 °C/W (junction-to-ambient on FR4), the SOT323 package limits continuous power dissipation to 200 mW at +25°C ambient. Derating is required above that temperature - e.g., ~160 mW at +50°C - based on the linear derating curve in the datasheet.
Can this Zener diode replace a 6.8 V variant in the same circuit?
No - MMBZ5234BW-7-F is rated for 6.2 V nominal breakdown, while MMBZ5235BW is 6.8 V. Substituting alters clamping threshold by 0.6 V, potentially causing undervoltage lockout or overvoltage exposure. Always match the exact zener voltage grade to circuit protection requirements.
MMBZ5234BW-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):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 4 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
MMBZ5234BW-7-F FAQ
1.How can I place an order for MMBZ5234BW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5234BW-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 MMBZ5234BW-7-F reliable?
The price and inventory of MMBZ5234BW-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 MMBZ5234BW-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5234BW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5234BW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5234BW-7-F?
MMBZ5234BW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5234BW-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 MMBZ5234BW-7-F?
For technical support, including MMBZ5234BW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5234BW-7-F requirements.
6.How does Aetrix verify that MMBZ5234BW-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5234BW-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 MMBZ5234BW-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5234BW-7-F?
All MMBZ5234BW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5234BW-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 MMBZ5234BW-7-F part is unused and in its original packaging.
Return procedure for MMBZ5234BW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5234BW-7-F Tags
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