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Diodes Incorporated MMBZ5226BW-7-F
- Part No.:
- MMBZ5226BW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBZ5226BW-7-F.pdf
- Description:
- DIODE ZENER 3.3V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,429
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Product details
Overview
MMBZ5226BW-7-F from Diodes Incorporated is a 3.3 V, 200 mW surface-mount Zener diode in SOT323 package, rated for ±3% zener voltage tolerance at 20 mA test current, with 28 Ω dynamic impedance and 25 μA reverse leakage at 1.0 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMBZ5226BW-7-F datasheet, MMBZ5226BW-7-F pinout, MMBZ5226BW-7-F application, or MMBZ5226BW-7-F equivalent, key selection criteria include zener voltage accuracy, 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 mode to maintain stable 3.3 V regulation across load and line variations. It delivers specified performance at 20 mA test current with 28 Ω zener impedance at 1 kHz, and exhibits 25 μA maximum reverse leakage at VR = 1.0 V - critical for low-current biasing and sensing nodes.
Designed for high-reliability applications, it meets AEC-Q101 stress testing requirements and features a UL 94V-0 molded plastic case with matte tin-plated Alloy 42 leads. Its 625 °C/W junction-to-ambient thermal resistance assumes FR4 PCB mounting per AP02001 recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 3.3 V - precise regulation point for 3.3 V rail monitoring or reference generation |
| Zener Voltage Tolerance | ±3% (3.14–3.47 V) - ensures predictable clamping within tight analog supply margins |
| Power Dissipation | 200 mW - supports continuous operation in space-constrained, low-power designs |
| Zener Impedance | 28 Ω @ 1 kHz - low dynamic resistance preserves regulation stability under varying current loads |
| Reverse Leakage Current | 25 μA @ VR = 1.0 V - minimal parasitic drain in standby or battery-backed circuits |
| Thermal Resistance | 625 °C/W - defines safe operating temperature rise on standard FR4 board with defined copper pads |
| Operating Temperature | −65 °C to +150 °C - enables use in automotive under-hood and industrial environments |
Pinout & Package
Package: SOT323 - ultra-small 3-pin surface-mount package (2.10 mm × 1.30 mm × 0.90 mm), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to circuit ground or lower-potential node during Zener operation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Provides stable 3.3 V reference when reverse-biased; ties to supply rail or feedback path |
| NC / Heat Sink (Pin 3) | Non-connected / thermal relief pad | Internally unconnected; serves as mechanical anchor and minor thermal path via exposed metal frame |
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 and halogen/antimony-free standards (<900 ppm Br/Cl, <1000 ppm Sb) |
| SOT323 package | Enables 0.65 mm pitch placement and compatibility with high-speed pick-and-place equipment |
| Moisture Sensitivity Level 1 | Zero bake requirement before reflow - simplifies manufacturing flow and reduces cost |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping on LIN bus transceiver I/O lines subject to load dump transients. IC Role / Device Role / Timing Role: Zener diode acting as primary overvoltage clamp to protect 3.3 V logic interface. Use Value: Limits transient excursions to ≤3.47 V, preventing latch-up in connected microcontrollers without adding series resistance. | Use Scenario: Providing stable 3.3 V reference for 12-bit ADC in temperature sensor front-end. IC Role / Device Role / Timing Role: Precision shunt reference supplying bias current to op-amp input stage. Use Value: Delivers ±3% voltage accuracy and 28 Ω impedance to minimize code-to-code variation under varying sensor loading. |
| Consumer IoT Power Management | Medical Wearable Battery Monitoring |
Use Scenario: Regulating auxiliary 3.3 V rail derived from switched-capacitor DC-DC converter with variable load. IC Role / Device Role / Timing Role: Low-power shunt regulator maintaining stable voltage during sleep/wake transitions. Use Value: Draws only 25 μA leakage at 1.0 V reverse bias, extending battery life in always-on monitoring modes. | Use Scenario: Overvoltage protection on lithium coin-cell charger input during USB hot-plug events. IC Role / Device Role / Timing Role: Fast-response clamp limiting input to 3.47 V before LDO input stage. Use Value: Withstands 1000 W non-repetitive surge (Fig. 6) and operates reliably from −65 °C to +150 °C for wearable environmental robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V3-7-F | Same 3.3 V nominal, ±5% tolerance (3.14–3.47 V), 300 mW rating, SOT23 package | Larger footprint; higher power allows higher surge handling but less dense layout | Select when higher surge immunity or legacy SOT23 tooling is required |
| MMSZ5226ET1G | 3.3 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package, 30 Ω ZZT | Higher power and larger package; not AEC-Q101 qualified | Prefer for cost-sensitive industrial applications where automotive qualification is unnecessary |
Compared with BZX84-C3V3-7-F and MMSZ5226ET1G, MMBZ5226BW-7-F offers tighter ±3% tolerance, AEC-Q101 qualification, and SOT323 miniaturization - making it optimal for space-constrained, automotive-grade voltage reference and clamping tasks.
Availability
MMBZ5226BW-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and consumer IoT power management requiring stable component supply, consistent parametric performance, and full traceability.
Supply support for MMBZ5226BW-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, specializing in high-reliability, energy-efficient components for automotive, industrial, and consumer markets.
The MMBZ52xxBW series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for precision voltage regulation and transient suppression in harsh-environment electronics where size, reliability, and regulatory compliance are critical.
FAQ
What is the maximum reverse voltage this Zener can safely clamp without damage?
The MMBZ5226BW-7-F is rated for 1.0 V reverse voltage in leakage specification (IR @ VR), but its absolute maximum reverse voltage is defined by its 3.3 V nominal zener voltage and ±3% tolerance - meaning it begins regulating above ~3.14 V. Sustained reverse bias below 3.14 V causes only leakage current; clamping occurs above that threshold up to its 200 mW power limit.
Is this part suitable for use in automotive engine control units?
Yes - the MMBZ5226BW-7-F is explicitly qualified to AEC-Q101 standards, including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. Its −65 °C to +150 °C operating range and SOT323 moisture sensitivity level 1 make it appropriate for under-hood ECU voltage supervision and I/O protection.
How does the SOT323 package affect thermal performance compared to SOT23?
The SOT323 package has higher thermal resistance (625 °C/W vs. ~350–450 °C/W for typical SOT23) due to smaller pad area and reduced copper exposure. This requires strict adherence to Diodes' AP02001 recommended pad layout on FR4 to achieve rated 200 mW dissipation; exceeding ambient temperature limits or using inadequate copper will derate power capability.
Can this Zener be used as a substitute for a 3.3 V voltage reference IC in precision circuits?
No - while it provides 3.3 V regulation, its ±3% tolerance, 28 Ω dynamic impedance, and temperature coefficient (~−1.75 mV/°C for 3.3 V Zeners) limit accuracy versus dedicated bandgap references (e.g., REF3033). It is appropriate for coarse clamping or biasing, but not for sub-0.1% reference applications requiring low drift and low noise.
MMBZ5226BW-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):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 28 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 1 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
MMBZ5226BW-7-F FAQ
1.How can I place an order for MMBZ5226BW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5226BW-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 MMBZ5226BW-7-F reliable?
The price and inventory of MMBZ5226BW-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 MMBZ5226BW-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5226BW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5226BW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5226BW-7-F?
MMBZ5226BW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5226BW-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 MMBZ5226BW-7-F?
For technical support, including MMBZ5226BW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5226BW-7-F requirements.
6.How does Aetrix verify that MMBZ5226BW-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5226BW-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 MMBZ5226BW-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5226BW-7-F?
All MMBZ5226BW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5226BW-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 MMBZ5226BW-7-F part is unused and in its original packaging.
Return procedure for MMBZ5226BW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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