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Diodes Incorporated MMSZ5226B-7-F
- Part No.:
- MMSZ5226B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5226B-7-F.pdf
- Description:
- DIODE ZENER 3.3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:35,231
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Product details
Overview
MMSZ5226B-7-F from Diodes Incorporated is a 3.3 V, 500 mW surface-mount Zener diode in SOD-123 package, rated for 20 mA test current with 28 Ω dynamic impedance at 1 kHz and 25 µA reverse leakage at 1.0 V, widely used for voltage regulation and reference in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the MMSZ5226B-7-F datasheet, MMSZ5226B-7-F pinout, MMSZ5226B-7-F application, or MMSZ5226B-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±3.6%), thermal resistance (338 °C/W), AEC-Q101 qualification status, SOD-123 footprint compatibility, and low-leakage performance at sub-breakdown bias.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 3.3 V nominal Zener voltage exhibits a positive temperature coefficient of approximately +0.04 %/°C, enabling predictable drift behavior in precision references.
The device delivers regulated output within ±3.6% tolerance (3.14–3.47 V) at 20 mA test current, with low dynamic impedance (28 Ω) ensuring minimal voltage variation under transient current changes, and supports continuous operation from –65 °C to +150 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 3.3 V - Stable regulation point for low-voltage reference and clamp applications |
| Zener Voltage Range | 3.14–3.47 V - Tight ±3.6% tolerance ensures consistent circuit thresholding |
| Test Current | 20 mA - Standard operating point for specified Zener voltage and impedance |
| Zener Impedance | 28 Ω @ 1 kHz - Low dynamic resistance minimizes output voltage ripple under load transients |
| Reverse Leakage | 25 µA @ 1.0 V - Enables reliable clamping below breakdown without excessive standby current |
| Power Dissipation | 370 mW @ TA = +25°C - Maximum continuous power on FR-4 PCB with standard pad layout |
| Thermal Resistance | 338 °C/W - Junction-to-ambient value determines safe derating above 25°C ambient |
Pinout & Package
Package: SOD-123 - Surface-mount plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); weight ≈ 0.01 g; RoHS-compliant, halogen-free molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias regulation; forms reference ground return path |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Marked by band; supplies regulated 3.3 V when biased above breakdown; connects to feedback or clamp point |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power rating at TL = +75°C | Enables higher-power operation with heatsinking or board-level thermal management |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
| SOD-123 footprint | Standardized 2-pin SMT package compatible with automated pick-and-place and reflow processes |
| Lead-free & green construction | Meets RoHS 2 and halogen/antimony restrictions (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated DC-DC converters using optocoupler feedback. IC Role / Device Role / Timing Role: Provides precise 3.3 V reference for TL431 or similar shunt regulator ICs in secondary-side feedback networks. Use Value: Maintains ±3.6% output accuracy across temperature and line variations without external trimming. |
Use Scenario: Protecting microcontroller I/O pins from transient surges on sensor interface lines. IC Role / Device Role / Timing Role: Acts as low-leakage shunt clamp, diverting excess energy before voltage exceeds 3.47 V. Use Value: Limits peak stress to 3.47 V with only 25 µA leakage at 1.0 V, preserving signal integrity during normal operation. |
| Low-Voltage Precision Reference | Automotive Body Control Module (BCM) |
Use Scenario: Generating stable bias for analog comparators in battery monitoring circuits. IC Role / Device Role / Timing Role: Supplies temperature-stable 3.3 V reference for ADC input scaling and threshold detection. Use Value: Delivers predictable +0.04 %/°C drift, enabling accurate state-of-charge estimation over –40 °C to +125 °C. |
Use Scenario: Voltage supervision in 12 V rail monitoring for door module ECUs. IC Role / Device Role / Timing Role: Serves as AEC-Q101-qualified Zener in reset supervisor or brown-out detection circuitry. Use Value: Guarantees functional safety compliance with automotive temperature and lifetime requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C3V3 | 3.3 V ±5%, 300 mW, SOD-323 package, 90 Ω Zener impedance | Higher impedance and smaller footprint limit current-handling and regulation stability | Select for space-constrained designs where 300 mW suffices and tighter voltage tolerance is not required |
| MM3Z3V3T1G | 3.3 V ±5%, 200 mW, SOD-323, 90 Ω impedance, no AEC-Q101 qualification | Lacks automotive qualification and has reduced power margin for sustained regulation | Prefer for cost-sensitive commercial applications with benign thermal environments |
Compared with BZX584-C3V3 and MM3Z3V3T1G, MMSZ5226B-7-F offers superior regulation stability (28 Ω vs. ≥90 Ω), higher power capability (370 mW vs. ≤200 mW), and AEC-Q101 qualification-making it optimal for automotive and industrial feedback and protection circuits demanding long-term reliability.
Availability
MMSZ5226B-7-F is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-voltage precision reference applications requiring stable component supply and automotive-grade reliability.
Supply support for MMSZ5226B-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 consumer markets with broad distribution and design-in support.
MMSZ5226B-7-F belongs to the MMSZ52xxB series of general-purpose Zener diodes engineered for medium-current voltage regulation and clamping in compact, automated-assembly-ready SOD-123 packages.
FAQ
What is the maximum continuous Zener current for MMSZ5226B-7-F at 25°C ambient?
The device supports up to 20 mA test current per datasheet specifications, but maximum continuous current is limited by power dissipation: at 3.3 V, 370 mW rating allows ~112 mA theoretically; however, thermal derating and junction temperature limits constrain practical operation to ≤60 mA on standard FR-4 PCB layouts.
Is MMSZ5226B-7-F suitable for use in automotive applications?
Yes - it is explicitly qualified to AEC-Q101 standards, including stress testing for temperature cycling, high-temperature reverse bias, and electrostatic discharge, making it approved for under-hood and body control module applications per automotive OEM requirements.
How does the SOD-123 package compare to SOD-323 for this Zener diode?
SOD-123 measures 2.65 mm × 1.55 mm × 1.05 mm and handles 370 mW at 25°C, while SOD-323 is smaller (1.7 mm × 1.25 mm × 0.95 mm) and typically rated for ≤200 mW; the larger SOD-123 enables better thermal performance and higher surge current capability in regulation circuits.
What is the typical temperature coefficient of MMSZ5226B-7-F?
Per Figure 6 in the datasheet, the MMSZ5226B (3.3 V type) exhibits a temperature coefficient of approximately +0.04 %/°C - meaning its Zener voltage increases by ~1.32 mV/°C over the operating range, enabling predictable compensation in reference designs.
MMSZ5226B-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:
- 500 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:
- SOD-123
MMSZ5226B-7-F FAQ
1.How can I place an order for MMSZ5226B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5226B-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 MMSZ5226B-7-F reliable?
The price and inventory of MMSZ5226B-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 MMSZ5226B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5226B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5226B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5226B-7-F?
MMSZ5226B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5226B-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 MMSZ5226B-7-F?
For technical support, including MMSZ5226B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5226B-7-F requirements.
6.How does Aetrix verify that MMSZ5226B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5226B-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 MMSZ5226B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5226B-7-F?
All MMSZ5226B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5226B-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 MMSZ5226B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5226B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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