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Diodes Incorporated MMSZ5245B-7-F
- Part No.:
- MMSZ5245B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5245B-7-F.pdf
- Description:
- DIODE ZENER 15V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:49,540
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Product details
Overview
MMSZ5245B-7-F from Diodes Incorporated is a 15 V, 500 mW surface-mount Zener diode in SOD-123 package, rated for 8.5 mA test current with 16 Ω dynamic impedance at 1 kHz and maximum 0.1 µA reverse leakage at 11 V, widely used for voltage regulation and reference in power supply feedback loops.
For engineers reviewing the MMSZ5245B-7-F datasheet, MMSZ5245B-7-F pinout, MMSZ5245B-7-F application, or MMSZ5245B-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (338 °C/W), AEC-Q101 qualification, RoHS/Green compliance, and SOD-123 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or input conditions. It delivers precise 15 V regulation with ±5% tolerance (14.25–15.75 V) at 8.5 mA test current and exhibits low temperature coefficient behavior typical of mid-voltage Zeners.
Designed for medium-current general-purpose regulation, it supports continuous operation up to +150 °C junction temperature and derates linearly above +75 °C ambient, with 370 mW dissipation at +25 °C on FR-4 PCB and 500 mW at lead temperature +75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V nominal, 14.25–15.75 V range at 8.5 mA - defines regulated output voltage in shunt regulator circuits |
| Power Dissipation | 370 mW at TA = +25 °C - limits continuous operating current in PCB-mounted applications |
| Zener Impedance (ZZT) | 16 Ω at 1 kHz, 8.5 mA - determines voltage stability under dynamic load changes |
| Reverse Leakage (IR) | 0.1 µA max at VR = 11 V - ensures minimal quiescent current in standby or precision bias networks |
| Thermal Resistance (RθJA) | 338 °C/W - governs junction temperature rise under given power and PCB copper area |
| Operating Temperature | −65 to +150 °C - enables use in automotive under-hood and industrial environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SOD-123 - surface-mount plastic case with cathode band marking, 0.01 g weight, UL 94V-0 flammability rating, and matte tin-plated Alloy 42 leadframe.
| 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 topology |
| Cathode | Zener breakdown terminal / regulated voltage output | Connected to input rail; clamps voltage to 15 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power rating at TL = +75 °C | Enables higher transient power handling than standard 370 mW rating at ambient, supporting surge-tolerant designs |
| SOD-123 package with J-STD-020 Level 1 moisture sensitivity | Allows standard reflow without baking, reducing manufacturing overhead in high-volume SMT lines |
| AEC-Q101 qualified | Validates robustness for automotive applications including engine control units and body electronics |
| Halogen- and antimony-free "Green" compound | Meets stringent environmental compliance (Br+Cl <1500 ppm, Sb <1000 ppm) without compromising thermal performance |
Applications
| Power Supply Feedback Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-derived DC-DC converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold in secondary-side regulation. Use Value: Maintains ±1% output accuracy over line/load/temperature with 15 V reference and 16 Ω impedance limiting feedback loop gain variation. |
Use Scenario: Protecting microcontroller I/O pins from ESD-induced transients exceeding 12 V. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting excess energy to ground before damage occurs. Use Value: Responds within nanoseconds to clamp voltage to ≤15.75 V peak, limiting stress on downstream CMOS inputs rated for 16 V absolute maximum. |
| Reference Voltage Source | Temperature-Stable Bias Network |
Use Scenario: Providing stable 15 V reference for analog-to-digital converter (ADC) reference buffers in data acquisition systems. IC Role / Device Role / Timing Role: Precision voltage source establishing ADC full-scale input range. Use Value: Delivers <0.1 µA leakage and low TC drift, minimizing reference error contribution to overall system INL/DNL performance. |
Use Scenario: Setting collector bias point for discrete BJT amplifiers in industrial sensor signal conditioning stages. IC Role / Device Role / Timing Role: Stable DC voltage node defining quiescent operating point independent of supply ripple. Use Value: Maintains bias stability across −40 to +125 °C due to AEC-Q101 thermal validation and predictable Zener TC profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C15 | 15 V, ±5%, 300 mW, SOD-523 package, 40 Ω ZZT at 5 mA | Lower power rating and higher impedance limit use to low-current references only | Select when board space is constrained and power demand is ≤100 mW |
| MMBZ5245BS | 15 V, ±5%, 300 mW, SOT-23 package, 16 Ω ZZT at 8.5 mA, no AEC-Q101 | Lacks automotive qualification but offers same electrical specs in larger-footprint package | Select for commercial-grade cost-sensitive designs where AEC-Q101 is not required |
Compared with BZX584-C15 and MMBZ5245BS, MMSZ5245B-7-F uniquely combines AEC-Q101 qualification, 500 mW lead-temperature-rated power, and SOD-123 manufacturability-making it optimal for automotive power management and industrial feedback circuits requiring both reliability and thermal headroom.
Availability
MMSZ5245B-7-F is available at Aetrix Electronics and suitable for automotive power supply feedback, industrial sensor biasing, and consumer device overvoltage protection requiring stable component supply and long-term lifecycle support.
Supply support for MMSZ5245B-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 MMSZ52xxB series targets cost-effective, high-reliability Zener regulation in space-constrained surface-mount applications, emphasizing AEC-Q101 compliance, green materials, and compatibility with high-speed automated assembly.
FAQ
What is the maximum continuous Zener current for MMSZ5245B-7-F at +85 °C ambient?
At +85 °C ambient, the device derates to approximately 270 mW (per Figure 1 power derating curve), allowing ~18 mA continuous Zener current (270 mW ÷ 15 V). This assumes standard FR-4 PCB layout with 1-inch² copper pad; actual current depends on thermal design.
Is MMSZ5245B-7-F suitable for use in a 24 V automotive system's 15 V rail clamp?
Yes - its 15 V Zener voltage, 15.75 V maximum breakdown, and AEC-Q101 qualification make it appropriate for clamping transients on 24 V system rails. It must be paired with a series current-limiting resistor sized to keep power within 370 mW at worst-case 24 V surge.
Does the SOD-123 package support hand-soldering during prototype development?
Yes - the SOD-123's 2.65 mm body width and 0.57 mm lead width are compatible with fine-tip soldering irons and flux application. Recommended preheat to 100 °C and peak temperature ≤260 °C for ≤10 seconds avoids molding compound damage.
How does the 0.1 µA reverse leakage at 11 V impact low-power battery-operated circuits?
This ultra-low leakage adds ≤0.1 µA to circuit quiescent current - negligible in most battery-powered applications (e.g., adding <0.1% annual drain to a 10 µA sleep-mode system). It ensures minimal impact on battery life while maintaining tight voltage regulation.
MMSZ5245B-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):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 11 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
MMSZ5245B-7-F FAQ
1.How can I place an order for MMSZ5245B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5245B-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 MMSZ5245B-7-F reliable?
The price and inventory of MMSZ5245B-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 MMSZ5245B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5245B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5245B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5245B-7-F?
MMSZ5245B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5245B-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 MMSZ5245B-7-F?
For technical support, including MMSZ5245B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5245B-7-F requirements.
6.How does Aetrix verify that MMSZ5245B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5245B-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 MMSZ5245B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5245B-7-F?
All MMSZ5245B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5245B-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 MMSZ5245B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5245B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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