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Diodes Incorporated MMSZ5248BQ-13-F
- Part No.:
- MMSZ5248BQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5248BQ-13-F.pdf
- Description:
- DIODE ZENER 18V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:18,310
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Product details
Overview
MMSZ5248BQ-13-F from Diodes Incorporated is an automotive-grade 18 V, 500 mW surface-mount Zener diode in SOD123 package, with nominal Zener voltage 17.1–18.9 V at 7.0 mA test current, 21 Ω dynamic impedance at 7.0 mA, and maximum reverse leakage of 0.1 µA at 14 V, used for precision voltage regulation and overvoltage protection in power supply feedback loops.
For engineers reviewing the MMSZ5248BQ-13-F datasheet, MMSZ5248BQ-13-F pinout, MMSZ5248BQ-13-F application, or MMSZ5248BQ-13-F equivalent, key selection criteria include Zener voltage tolerance (±5%), low leakage at rated VR, thermal derating behavior up to +150°C, and AEC-Q101 qualification for automotive under-hood environments.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across a defined current range (7.0 mA typical), with temperature coefficient optimized for 18 V nominal devices (≈+0.07%/°C). Its low 21 Ω Zener impedance ensures minimal voltage variation under load transients.
The device uses alloy 42 leadframe with matte tin plating, SOD123 molded plastic case rated UL 94V-0, and meets J-STD-020 moisture sensitivity Level 1 - enabling compatibility with standard reflow profiles without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17.1–18.9 V at IZT = 7.0 mA - defines regulation window for feedback sensing in 12 V/24 V automotive DC-DC converters |
| Power Dissipation | 500 mW @ TL = +75°C - supports continuous operation in high-ambient engine bay locations with proper PCB copper area |
| Zener Impedance (ZZT) | 21 Ω @ IZT = 7.0 mA - limits output voltage deviation to < ±150 mV under ±1 mA load step changes |
| Reverse Leakage (IR) | 0.1 µA @ VR = 14 V - ensures negligible error current in high-impedance voltage divider networks |
| Operating Temperature | −65°C to +150°C - validated for under-hood placement per AEC-Q101 stress testing (HTOL, TC, HAST) |
| Package | SOD123 - 2.65 mm × 1.55 mm footprint with 0.57 mm lead width, compatible with automated pick-and-place and reflow soldering |
Pinout & Package
Two-terminal device in SOD123 package: cathode marked by band on body; anode and cathode terminals are unidirectional, with cathode serving as voltage reference node in shunt regulator configurations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference Ground Node | Connected to system ground or common return path; establishes reference potential for Zener breakdown |
| Cathode | Voltage Regulation Node | Connected to regulated rail or feedback point; maintains stable voltage relative to anode during reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control units and body electronics requiring high reliability |
| Green Molding Compound | Halogen- and antimony-free formulation (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb) meeting RoHS 2 and ELV directives |
| Low Thermal Resistance | RθJA = 338°C/W on FR-4 with 1-inch² copper pad - enables 500 mW dissipation within safe junction temperature limits |
| Matte Tin Lead Finish | Solderable per MIL-STD-202 Method 208; compatible with Pb-free and SnPb reflow processes without dewetting risk |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage for 5 V LDO regulators powering microcontroller cores in engine management systems. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 18 V clamp to protect downstream ICs from battery surge events. Use Value: Maintains regulation accuracy within ±5% over −40°C to +125°C ambient, reducing need for external trimming components. | Use Scenario: Protecting 24 V analog input channels from transient overvoltage in factory automation I/O modules. IC Role / Device Role / Timing Role: Overvoltage clamping element placed before signal conditioning op-amps to limit input excursion. Use Value: Sub-µA leakage at 14 V prevents loading of high-impedance sensor bridges, preserving measurement integrity. |
| Telecom Power Supply Feedback | Medical Diagnostic Equipment Bias Supply |
Use Scenario: Setting reference voltage for isolated flyback controller feedback optocoupler circuits in telecom AC-DC adapters. IC Role / Device Role / Timing Role: Precision Zener reference establishing stable secondary-side regulation threshold. Use Value: 21 Ω Zener impedance minimizes output ripple contribution from load-step-induced voltage droop. | Use Scenario: Generating stable bias voltage for photodiode amplifier stages in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Low-noise voltage reference source for ultra-low-current analog signal chains. Use Value: 0.1 µA max reverse leakage avoids introducing offset errors in picoamp-level current measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18LT1G | 18 V nominal, ±5% tolerance, 300 mW rating, SOT-23 package, 40 Ω ZZT @ 5 mA | Lower power rating and higher impedance reduce regulation stability under dynamic loads | Select when board space is constrained and thermal budget allows lower dissipation |
| MMSZ5248BS-13-F | Identical electrical specs but commercial-grade (non-AEC-Q101), same SOD123 package and marking | Not qualified for automotive use; unsuitable for mission-critical vehicle subsystems | Choose for cost-sensitive industrial or consumer designs where AEC-Q101 is not mandated |
Compared with BZX84-C18LT1G and MMSZ5248BS-13-F, MMSZ5248BQ-13-F uniquely combines AEC-Q101 qualification, 500 mW capability, and 21 Ω low-impedance regulation - making it optimal for automotive power management where reliability and thermal robustness are non-negotiable.
Availability
MMSZ5248BQ-13-F is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC analog protection, and telecom power supply feedback requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMSZ5248BQ-13-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.
The MMSZ52xxB series targets cost-effective, high-volume Zener regulation needs in automotive and industrial applications, emphasizing AEC-Q101 compliance, green packaging, and consistent parametric performance across temperature.
FAQ
What is the maximum power dissipation of MMSZ5248BQ-13-F at +100°C ambient?
At +100°C ambient, the device's power dissipation is derated to approximately 185 mW based on the linear derating curve (500 mW at +75°C, zero at +150°C). This assumes mounting on FR-4 with 1-inch² copper pad per Diodes' test condition.
Does MMSZ5248BQ-13-F have a specified capacitance value?
No capacitance specification is provided in the DS18010 datasheet for MMSZ5248BQ-13-F. Figure 4 shows typical total capacitance ≈15 pF for 18 V Zener devices, but this is not a guaranteed parameter and should not be used for timing or filtering design without characterization.
Is the cathode band polarity consistent across all SOD123-packaged Zeners from Diodes Incorporated?
Yes - all SOD123 Zener diodes in the MMSZ52xxB series, including MMSZ5248BQ-13-F, use a single black cathode band adjacent to the cathode terminal, aligned with industry-standard SOD123 polarity marking conventions.
Can MMSZ5248BQ-13-F replace MMSZ5248BS-13-F in existing designs?
Yes, electrically and mechanically - both share identical Zener voltage, impedance, package, and marking. However, MMSZ5248BQ-13-F adds AEC-Q101 qualification and automotive tape-and-reel packaging (Q-suffix), so replacement requires validation only for automotive reliability requirements, not circuit functionality.
MMSZ5248BQ-13-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):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 370 mW
- Impedance (Max) (Zzt):
- 21 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 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
MMSZ5248BQ-13-F FAQ
1.How can I place an order for MMSZ5248BQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5248BQ-13-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 MMSZ5248BQ-13-F reliable?
The price and inventory of MMSZ5248BQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5248BQ-13-F is usually 5 days.
3.What payment methods are accepted for MMSZ5248BQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5248BQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5248BQ-13-F?
MMSZ5248BQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5248BQ-13-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 MMSZ5248BQ-13-F?
For technical support, including MMSZ5248BQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5248BQ-13-F requirements.
6.How does Aetrix verify that MMSZ5248BQ-13-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5248BQ-13-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 MMSZ5248BQ-13-F meets industry standards.
7.What is the process for return or replacement of MMSZ5248BQ-13-F?
All MMSZ5248BQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5248BQ-13-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 MMSZ5248BQ-13-F part is unused and in its original packaging.
Return procedure for MMSZ5248BQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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