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Diodes Incorporated MMSZ5226BQ-7-F
- Part No.:
- MMSZ5226BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5226BQ-7-F.pdf
- Description:
- DIODE ZENER 3.3V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MMSZ5226BQ-7-F from Diodes Incorporated is an automotive-grade 3.3 V, 500 mW surface-mount Zener diode in SOD123 package, rated for 20 mA test current, 28 Ω dynamic impedance at 1 kHz, and 25 µA reverse leakage at 1.0 V, used for precision voltage regulation and reference in power supply feedback loops.
For engineers reviewing the MMSZ5226BQ-7-F datasheet, MMSZ5226BQ-7-F pinout, MMSZ5226BQ-7-F application, or MMSZ5226BQ-7-F equivalent, key selection criteria include Zener voltage tolerance (±3.6%), thermal resistance (338 °C/W), AEC-Q101 qualification, and SOD123 footprint compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 3.3 V output across varying load and temperature conditions. Its 28 Ω Zener impedance at 20 mA ensures low voltage deviation under dynamic current changes, while the 25 µA reverse leakage at VR = 1.0 V supports low-power biasing in sensing and reference circuits.
Designed for automotive environments, it meets AEC-Q101 stress testing requirements and features a matte tin–plated alloy 42 leadframe with moisture sensitivity level 1. The SOD123 package enables compact layout and high thermal dissipation on FR-4 PCBs with 1-inch copper pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 3.3 V nominal, 3.14–3.47 V range at 20 mA - defines regulated output voltage tolerance for feedback networks. |
| Power Dissipation | 370 mW at TA = +25°C - sets maximum continuous DC power handling on standard PCB layout. |
| Zener Impedance | 28 Ω at 1 kHz, 20 mA - determines AC voltage variation under ripple or transient load shifts. |
| Reverse Leakage | 25 µA at VR = 1.0 V - ensures minimal quiescent current draw in low-power voltage reference paths. |
| Thermal Resistance | 338 °C/W junction-to-ambient - quantifies temperature rise per watt on standard FR-4 mounting. |
| Operating Temp | −65°C to +150°C - supports under-hood and industrial control applications without derating. |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × D × A); weight ≈ 0.01 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulator configuration. |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to input voltage source and load; maintains 3.3 V relative to anode during breakdown. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control units and body modules. |
| SOD123 footprint | Enables high-density placement and compatibility with industry-standard pick-and-place equipment. |
| Green molding compound | UL 94V-0 rated, halogen- and antimony-free - satisfies strict environmental compliance for Tier-1 suppliers. |
| Low Zener impedance | 28 Ω at 20 mA ensures <±30 mV regulation shift under ±5 mA load transients. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing reference voltage for analog-to-digital converter (ADC) inputs monitoring throttle position and coolant temperature. IC Role / Device Role / Timing Role: Shunt voltage reference providing 3.3 V bias to op-amp buffers and ADC reference pins. Use Value: Maintains ±1.5% voltage accuracy over −40°C to +125°C, enabling sub-12-bit measurement linearity. |
Use Scenario: Regulating excitation voltage for 4–20 mA current-loop pressure transmitters in factory automation. IC Role / Device Role / Timing Role: Precision Zener element in two-terminal current-source feedback path. Use Value: Low 25 µA leakage minimizes error contribution to loop current accuracy (<0.05% FS). |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Reference |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters powering USB-C PD accessories. IC Role / Device Role / Timing Role: Zener clamp in optocoupler feedback network regulating output voltage. Use Value: 28 Ω impedance limits feedback voltage drift to <±10 mV under 10–100 kHz switching noise. |
Use Scenario: Providing stable bias for photodiode amplifiers in portable pulse oximeters. IC Role / Device Role / Timing Role: Low-noise voltage reference for transimpedance amplifier offset setting. Use Value: −65°C to +150°C operating range supports sterilization cycles and battery-operated field use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V3 | 3.3 V ±5%, 300 mW rating, SOD323 package, 90 Ω Zener impedance at 5 mA | Lower power and higher impedance limit use to low-current references only | Select when board space is constrained and load current remains below 5 mA |
| MMSZ5226BS-7-F | Identical electrical specs but commercial-grade (non-AEC-Q101), same SOD123 package | Lacks automotive qualification; unsuitable for safety-critical vehicle subsystems | Choose for cost-sensitive industrial or consumer designs where AEC-Q101 is not mandated |
Compared with BZX584C3V3 and MMSZ5226BS-7-F, MMSZ5226BQ-7-F uniquely combines AEC-Q101 reliability, 370 mW power capability, and 28 Ω low-impedance regulation-making it optimal for automotive power management and high-stability industrial references.
Availability
MMSZ5226BQ-7-F is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor signal conditioning, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMSZ5226BQ-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 components for automotive, industrial, and computing markets.
MMSZ5226BQ-7-F belongs to the MMSZ52xxB automotive Zener diode family, engineered for precision voltage regulation in harsh-environment applications where AEC-Q101 qualification and tight Zener voltage tolerance are mandatory.
FAQ
What is the Zener voltage tolerance for MMSZ5226BQ-7-F?
The MMSZ5226BQ-7-F has a nominal Zener voltage of 3.3 V with a guaranteed range of 3.14 V to 3.47 V at 20 mA test current, corresponding to ±3.6% tolerance. This specification is verified per DS18010 Rev. 28 and applies across the full operating temperature range of −65°C to +150°C.
Is MMSZ5226BQ-7-F compatible with lead-free reflow soldering?
Yes - MMSZ5226BQ-7-F uses matte tin–plated alloy 42 leads and is qualified for lead-free reflow per JEDEC J-STD-020. Its SOD123 package withstands peak temperatures up to 260°C for 10 seconds, and its moisture sensitivity level is rated Level 1, eliminating bake requirements prior to assembly.
How does the thermal performance differ between TA and TL conditions?
At TA = +25°C, maximum power dissipation is 370 mW; at TL = +75°C (lead temperature), it rises to 500 mW. This reflects the device's ability to dissipate more heat when leads are actively cooled - critical for high-reliability automotive layouts using thermal vias and copper pours to manage junction temperature.
Can MMSZ5226BQ-7-F replace MMSZ5226B-7-F in existing designs?
Yes - MMSZ5226BQ-7-F shares identical electrical characteristics and SOD123 mechanical dimensions with the commercial MMSZ5226B-7-F, differing only in AEC-Q101 qualification and traceability documentation. No layout or schematic changes are required for drop-in replacement in automotive designs.
MMSZ5226BQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 370 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5226BQ-7-F FAQ
1.How can I place an order for MMSZ5226BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5226BQ-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 MMSZ5226BQ-7-F reliable?
The price and inventory of MMSZ5226BQ-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 MMSZ5226BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5226BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5226BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5226BQ-7-F?
MMSZ5226BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5226BQ-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 MMSZ5226BQ-7-F?
For technical support, including MMSZ5226BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5226BQ-7-F requirements.
6.How does Aetrix verify that MMSZ5226BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5226BQ-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 MMSZ5226BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5226BQ-7-F?
All MMSZ5226BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5226BQ-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 MMSZ5226BQ-7-F part is unused and in its original packaging.
Return procedure for MMSZ5226BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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