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Diodes Incorporated MMSZ5246BQ-13-F
- Part No.:
- MMSZ5246BQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5246BQ-13-F.pdf
- Description:
- DIODE ZENER 16V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MMSZ5246BQ-13-F from Diodes Incorporated is a 16 V, 500 mW surface-mount Zener diode in SOD-123 package, rated for automotive AEC-Q101 qualification, with 7.8 mA test current, 17 Ω dynamic impedance at 1 kHz, and 0.1 µA reverse leakage at 12 V. It provides precision voltage regulation in low-power biasing and reference circuits for automotive control modules.
For engineers reviewing the MMSZ5246BQ-13-F datasheet, MMSZ5246BQ-13-F pinout, MMSZ5246BQ-13-F application, or MMSZ5246BQ-13-F equivalent, this page delivers verified electrical parameters, thermal derating behavior, cathode-band polarity identification, and automotive-grade reliability context - critical for ESD-sensitive analog rails and sensor supply stabilization.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under controlled current conditions. Its 16 V nominal Zener voltage (15.2–16.8 V range) and low 17 Ω impedance at 7.8 mA enable tight regulation in feedback networks and voltage clamping paths.
Designed for automotive environments, it meets AEC-Q101 stress testing requirements including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. The SOD-123 package supports automated placement and offers 338 °C/W junction-to-ambient thermal resistance on FR-4 PCBs with 1-inch copper pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V nominal (15.2–16.8 V range at IZT = 7.8 mA); defines stable regulation point for reference or clamp circuits |
| Power Dissipation | 500 mW @ TL = +75°C; limits continuous power handling in thermally constrained layouts |
| Zener Impedance (ZZT) | 17 Ω @ 1 kHz, 7.8 mA; determines output voltage variation under load transients |
| Reverse Leakage (IR) | 0.1 µA @ VR = 12 V; ensures minimal quiescent current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 338 °C/W on FR-4 with 1-inch copper pad; governs junction temperature rise under steady-state dissipation |
| Operating Temperature | −65°C to +150°C; supports under-hood and powertrain electronics deployment |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including HTOL, TC, and HAST; required for ASIL-B supporting functions |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-biased regulation; forms return path for Zener current |
| Cathode (marked by band) | Zener breakdown terminal / regulated output node | Connected to higher-potential rail; maintains stable 16 V relative to anode during breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - enables use in engine control units, body controllers, and ADAS sensor interfaces without additional qualification effort |
| Green compound packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb); satisfies EU ELV and OEM sustainability mandates |
| Lead-free plating | Matte tin over Alloy 42 leadframe; RoHS-compliant and MIL-STD-202 solderable for reflow and wave processes |
| Low leakage at sub-Zener voltage | 0.1 µA @ 12 V - minimizes error in precision voltage dividers and high-Z feedback paths |
Applications
| Engine Control Unit Reference | Automotive Cabin Sensor Bias |
|---|---|
Use Scenario: Stable 16 V reference for microcontroller ADC reference or op-amp bias in ECU power management ICs. IC Role / Device Role / Timing Role: Zener diode providing regulated voltage source for analog subsystems requiring low-drift DC references. Use Value: Maintains ±0.5% regulation over −40°C to +125°C ambient, reducing calibration drift in closed-loop fuel injection control. | Use Scenario: Biasing photodiode or MEMS pressure sensor in HVAC or occupancy detection modules. IC Role / Device Role / Timing Role: Low-leakage voltage clamp ensuring consistent sensor operating point despite battery voltage fluctuations. Use Value: 0.1 µA reverse leakage prevents signal offset errors in nanoamp-level sensor current paths. |
| Infotainment Power Rail Clamp | ADAS Camera Module Protection |
Use Scenario: Overvoltage protection on 12 V input rail of infotainment head unit power supply. IC Role / Device Role / Timing Role: Shunt regulator absorbing transient surges above 16 V to protect downstream LDOs and PMICs. Use Value: 500 mW power rating handles ISO 7637-2 pulse 1/2a events without thermal runaway when paired with series current limiting. | Use Scenario: ESD protection and voltage clamping on image sensor analog supply lines in rear-view camera modules. IC Role / Device Role / Timing Role: Fast-response Zener clamp suppressing CDM and HBM transients before they reach sensitive pixel circuitry. Use Value: SOD-123 footprint enables placement within 2 mm of connector entry point, minimizing inductance and improving clamping effectiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C16-Q | 16 V, 300 mW, SOD-523, 20 Ω ZZT, 0.1 µA IR @ 12 V | Lower power rating and smaller package; less thermal margin in sustained clamp duty | Select when board space is critical and peak power < 300 mW; verify thermal relief on PCB |
| MMBZ5246B-7-F | 16 V, 350 mW, SOT-23, 17 Ω ZZT, 0.1 µA IR @ 12 V, commercial grade | SOT-23 footprint; lacks AEC-Q101 qualification and automotive traceability | Acceptable for non-automotive industrial controls where qualification is not mandated |
Compared with BZX584C16-Q and MMBZ5246B-7-F, MMSZ5246BQ-13-F uniquely combines AEC-Q101 qualification, 500 mW power capability, and SOD-123 manufacturability - making it the only choice for production automotive systems requiring both reliability and thermal robustness.
Availability
MMSZ5246BQ-13-F is available at Aetrix Electronics and suitable for automotive engine control units, cabin sensor bias networks, and infotainment power rail clamping requiring stable component supply and full AEC-Q101 traceability.
Supply support for MMSZ5246BQ-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The MMSZ52xxB series targets cost-sensitive, high-volume automotive and industrial Zener regulation needs - delivering AEC-Q101 reliability in compact SOD-123 packages without sacrificing voltage tolerance or thermal performance.
FAQ
What is the maximum continuous Zener current for MMSZ5246BQ-13-F at +85°C ambient?
At +85°C ambient, derating per Figure 1 reduces the 500 mW rating to approximately 375 mW. With VZ = 16 V, the maximum continuous Zener current is ~23.4 mA. This assumes standard FR-4 mounting with 1-inch copper pad; actual current must be reduced further if board thermal relief is limited.
Does MMSZ5246BQ-13-F have a specified capacitance value?
No capacitance value is specified in the DS18010 datasheet for MMSZ5246BQ-13-F. Figure 4 shows typical total capacitance for the MMSZ52xxB family decreasing with increasing Zener voltage - estimating ~12 pF at 16 V - but this is not a guaranteed parameter and should not be used in timing-critical designs without empirical validation.
How is the cathode identified on the SOD-123 package?
The cathode is marked by a distinct color band (typically black or dark gray) located near one end of the SOD-123 body. When viewed from the top with the band on the left, the left terminal is cathode and the right terminal is anode - matching standard diode polarity convention for reverse-biased Zener operation.
Can MMSZ5246BQ-13-F replace MMSZ5245BQ-13-F in a 15 V reference circuit?
No - MMSZ5245BQ-13-F has a nominal Zener voltage of 15 V (14.25–15.75 V), while MMSZ5246BQ-13-F is 16 V (15.2–16.8 V). Substituting introduces a systematic +1 V offset, degrading accuracy in precision references. Use only if the system tolerates ±1 V shift or recalibration is performed.
MMSZ5246BQ-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):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 370 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5246BQ-13-F FAQ
1.How can I place an order for MMSZ5246BQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5246BQ-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 MMSZ5246BQ-13-F reliable?
The price and inventory of MMSZ5246BQ-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 MMSZ5246BQ-13-F is usually 5 days.
3.What payment methods are accepted for MMSZ5246BQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5246BQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5246BQ-13-F?
MMSZ5246BQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5246BQ-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 MMSZ5246BQ-13-F?
For technical support, including MMSZ5246BQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5246BQ-13-F requirements.
6.How does Aetrix verify that MMSZ5246BQ-13-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5246BQ-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 MMSZ5246BQ-13-F meets industry standards.
7.What is the process for return or replacement of MMSZ5246BQ-13-F?
All MMSZ5246BQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5246BQ-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 MMSZ5246BQ-13-F part is unused and in its original packaging.
Return procedure for MMSZ5246BQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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