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Diodes Incorporated MMSZ5246B-7-F
- Part No.:
- MMSZ5246B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5246B-7-F.pdf
- Description:
- DIODE ZENER 16V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,821
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Product details
Overview
MMSZ5246B-7-F from Diodes Incorporated is a 16 V, 500 mW surface-mount Zener diode in SOD-123 package, rated for 7.8 mA test current, 17 Ω zener impedance at 1 kHz, and 0.1 µA reverse leakage at 12 V, widely used for voltage regulation and reference in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the MMSZ5246B-7-F datasheet, MMSZ5246B-7-F pinout, MMSZ5246B-7-F application, or MMSZ5246B-7-F equivalent, key selection criteria include nominal zener voltage tolerance (±5%), thermal resistance (338 °C/W), AEC-Q101 qualification status, and SOD-123 footprint compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 16 V nominal zener voltage exhibits a positive temperature coefficient of +0.07 %/°C, and it delivers regulated output with ≤17 Ω dynamic impedance at IZT = 7.8 mA.
The device is qualified to AEC-Q101 standards, features matte tin-plated alloy 42 leads, and uses halogen- and antimony-free green molding compound compliant with RoHS 2 (2011/65/EU). It is rated for operation from −65 °C to +150 °C with 0.01 g mass and cathode band polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V nominal, 15.2–16.8 V range at 7.8 mA - ensures ±5% regulation accuracy in reference circuits |
| Power Dissipation | 370 mW @ TA = 25°C - defines maximum continuous DC power on standard FR-4 PCB |
| Zener Impedance (ZZT) | 17 Ω @ 1 kHz, 7.8 mA - determines AC ripple rejection capability in low-noise references |
| Reverse Leakage (IR) | 0.1 µA @ VR = 12 V - enables low standby current in battery-backed voltage monitors |
| Thermal Resistance (RθJA) | 338 °C/W - sets junction-to-ambient temperature rise per watt, critical for thermal derating above 25°C |
| Operating Temperature | −65 °C to +150 °C - supports automotive under-hood and industrial control environments |
Pinout & Package
Package: SOD-123 - compact 2-pin surface-mount plastic case (1.55 mm × 2.65 mm × 1.05 mm), cathode band marked on top surface, compatible with reflow soldering and automated pick-and-place.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower potential node in shunt regulation configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input voltage source; maintains stable 16 V relative to anode during reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power rating | Enables use in medium-current regulation without external heat sinking on standard PCBs |
| AEC-Q101 qualification | Validates reliability for automotive electronics including body control modules and sensor interfaces |
| Lead-free & RoHS 2 compliant | Meets global environmental compliance requirements for commercial and industrial production |
| SOD-123 footprint | Supports high-density PCB layouts and compatibility with industry-standard tape-and-reel handling (3,000 pcs/reel) |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or buck converter feedback networks. IC Role / Device Role: Shunt voltage reference connected to optocoupler input or TL431 cathode. Use Value: Provides precise 16 V reference with <±5% tolerance and low dynamic impedance to stabilize loop response. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events. IC Role / Device Role: Clamping diode placed between signal line and ground with series current-limiting resistor. Use Value: Activates at 16 V to divert surge current, limiting voltage to safe levels while drawing only 0.1 µA at 12 V. |
| Voltage Reference | Automotive Sensor Biasing |
|
Use Scenario: Generating stable bias voltage for analog front-end circuits in data acquisition systems. IC Role / Device Role: Precision shunt reference supplying fixed voltage to op-amp bias networks or ADC reference dividers. Use Value: Delivers low-drift 16 V reference with +0.07 %/°C TC and 17 Ω impedance for <0.5% total error over −40 to +85°C. |
Use Scenario: Providing regulated excitation voltage to resistive temperature sensors (RTDs) in engine control units. IC Role / Device Role: Stable voltage source powering sensor bridges in harsh under-hood environments. Use Value: AEC-Q101 qualification and −65 to +150 °C operating range ensure long-term stability in automotive thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C16LT1G | 16 V, ±5%, 300 mW, SOD-323 package, 40 Ω ZZT | Lower power rating and higher impedance limit use in higher-current regulation | Select when board space is constrained and 300 mW suffices; verify thermal margin on FR-4 |
| MMBZ5246B-7-F | Same electrical specs, but in SOT-23 package with 3-pin footprint (anode/cathode/unused) | Requires different land pattern and may introduce parasitic capacitance in high-frequency clamping | Choose for legacy SOT-23 board reuse; confirm pin 1 alignment and unused pin isolation |
Compared with BZX584C16LT1G and MMBZ5246B-7-F, MMSZ5246B-7-F offers superior power handling (370 mW vs. 300 mW) and lower dynamic impedance (17 Ω vs. 40 Ω), making it preferred for precision reference and higher-current clamp roles where thermal performance and regulation stability are critical.
Availability
MMSZ5246B-7-F is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, voltage reference, and automotive sensor biasing requiring stable component supply and AEC-Q101-compliant sourcing.
Supply support for MMSZ5246B-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.
MMSZ5246B-7-F belongs to the MMSZ52xxB family of general-purpose Zener diodes designed for cost-effective, high-reliability voltage regulation and protection in commercial and automotive applications.
FAQ
What is the maximum continuous power dissipation for MMSZ5246B-7-F at 75°C ambient?
The device is rated for 500 mW power dissipation at lead temperature (TL) = 75°C, but derates linearly above 25°C ambient. At TA = 75°C, maximum power drops to approximately 205 mW using the 338 °C/W RθJA value and standard FR-4 layout.
Is MMSZ5246B-7-F suitable for automotive applications?
Yes - it is explicitly qualified to AEC-Q101 standards, features halogen- and antimony-free "Green" packaging, and operates across −65 °C to +150 °C, making it approved for use in automotive body electronics, infotainment, and engine management subsystems.
How does the cathode band marking align with the SOD-123 package outline?
The cathode band is a visible silver or black stripe located at the top edge of the SOD-123 case, adjacent to the cathode terminal. Per Diodes Incorporated's top view diagram, the band corresponds to the leftmost pin when the marking side faces up and the cathode pad is oriented toward the viewer's left.
What is the typical temperature coefficient of MMSZ5246B-7-F?
The temperature coefficient is +0.07 %/°C, as confirmed by Figure 6 in DS18010 Rev. 28-2, indicating that zener voltage increases by ~11.2 mV per °C rise across the 16 V nominal rating - critical for high-accuracy reference designs over wide temperature ranges.
MMSZ5246B-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):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 12 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
MMSZ5246B-7-F FAQ
1.How can I place an order for MMSZ5246B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5246B-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 MMSZ5246B-7-F reliable?
The price and inventory of MMSZ5246B-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 MMSZ5246B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5246B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5246B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5246B-7-F?
MMSZ5246B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5246B-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 MMSZ5246B-7-F?
For technical support, including MMSZ5246B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5246B-7-F requirements.
6.How does Aetrix verify that MMSZ5246B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5246B-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 MMSZ5246B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5246B-7-F?
All MMSZ5246B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5246B-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 MMSZ5246B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5246B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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