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Diodes Incorporated MMSZ5240BQ-7-F
- Part No.:
- MMSZ5240BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5240BQ-7-F.pdf
- Description:
- DIODE ZENER 10V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:20,645
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Product details
Overview
MMSZ5240BQ-7-F from Diodes Incorporated is an automotive-grade 10 V, 500 mW surface-mount Zener diode in SOD123 package, rated for 20 mA test current, 17 Ω dynamic impedance at 20 mA, and 3.0 µA reverse leakage at 8.0 V, used for precision voltage regulation and overvoltage protection in power supply feedback loops and sensor biasing circuits.
For engineers reviewing the MMSZ5240BQ-7-F datasheet, MMSZ5240BQ-7-F pinout, MMSZ5240BQ-7-F application, or MMSZ5240BQ-7-F equivalent, this part delivers AEC-Q101 qualified stability for automotive body control modules, industrial sensor signal conditioning, and embedded DC-DC reference design where tight Zener voltage tolerance (±5%), low thermal resistance (338 °C/W), and green RoHS compliance are required.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 10 V reference across load variations, with a nominal Zener voltage of 9.50–10.50 V at 20 mA test current and temperature coefficient near +0.06 %/°C per Figure 6. Its 600 Ω knee impedance at 0.25 mA ensures predictable turn-on behavior under low-current conditions.
The device uses alloy 42 leadframe with matte tin plating, SOD123 molded plastic case rated UL 94V-0, and moisture sensitivity level 1 - enabling compatibility with standard reflow profiles and high-reliability automotive PCB assembly without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.50–10.50 V @ IZT = 20 mA - defines regulated output range for feedback networks requiring ±5% tolerance. |
| Power Dissipation | 370 mW @ TA = +25°C - sets maximum continuous power in ambient air on FR-4 board with 1-inch copper pad. |
| Zener Impedance (ZZT) | 17 Ω @ IZT = 20 mA - determines AC regulation error under dynamic load changes in voltage reference paths. |
| Reverse Leakage (IR) | 3.0 µA @ VR = 8.0 V - limits standby current in high-impedance bias networks and battery-powered sensors. |
| Thermal Resistance (RθJA) | 338 °C/W - quantifies junction-to-ambient temperature rise per watt, critical for derating above +25°C ambient. |
| Package | SOD123 - 2-pin surface-mount outline with cathode band marking, compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Two-terminal device in SOD123 package: anode and cathode marked by molded cathode band on top surface; no internal circuitry or active pins beyond these two terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node in reverse-biased configuration; establishes reference return path for regulated output. |
| Cathode | Zener breakdown terminal / regulated voltage output | Connected to higher-potential node; provides stable 10 V output when reverse biased above breakdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power domains with extended temperature cycling and humidity testing. |
| Green molding compound | Halogen- and antimony-free formulation (<900 ppm Br+Cl, <1000 ppm Sb) meeting automotive environmental compliance requirements. |
| Low-profile SOD123 footprint | 1.55 mm width × 2.65 mm length × 1.05 mm height enables dense PCB layouts in space-constrained modules like smart actuators. |
| Matte tin annealed plating | Ensures reliable solder wetting and intermetallic formation during lead-free reflow, eliminating whisker risk in long-life deployments. |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for LIN bus transceiver biasing and microcontroller ADC reference in door module ECUs. IC Role / Device Role / Timing Role: Zener diode providing stable 10 V rail for analog front-end ICs and voltage comparators. Use Value: Maintains ±0.5 V regulation over -40°C to +125°C ambient, ensuring consistent ADC accuracy despite battery voltage fluctuations. |
Use Scenario: Setting precise bias point for 4–20 mA current loop transmitter op-amps in factory floor pressure sensors. IC Role / Device Role / Timing Role: Voltage reference element stabilizing op-amp common-mode input in isolated analog signal chains. Use Value: Delivers <3.0 µA leakage at 8 V reverse bias, minimizing offset drift in high-impedance feedback networks. |
| Embedded DC-DC Feedback Network | Overvoltage Protection Clamp |
Use Scenario: Providing feedback reference for adjustable buck converter ICs in medical portable devices requiring low-noise 3.3 V output. IC Role / Device Role / Timing Role: Precision shunt reference replacing TL431 in cost-sensitive designs with fixed 10 V setpoint. Use Value: Achieves 17 Ω Zener impedance at 20 mA, reducing output ripple sensitivity compared to higher-Z alternatives. |
Use Scenario: Clamping transient surges on 12 V CAN bus lines during load dump events in vehicle infotainment head units. IC Role / Device Role / Timing Role: Fast-acting voltage clamp limiting line voltage to ≤10.5 V during ESD or ISO 7637-2 pulse 5a events. Use Value: Withstands 500 mW peak pulse power and exhibits <100 ns response time due to low junction capacitance (~15 pF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C10-Q | 10 V, ±5%, 300 mW, SOD-323 package, 20 Ω ZZT, 100 nA IR @ 8 V | Lower power rating and smaller footprint limit use to low-current references; superior leakage performance suits ultra-low-power IoT nodes. | Select when board space is constrained and leakage <100 nA is mandatory, but derate power to 300 mW max. |
| 1N4740A | 10 V, ±5%, 1 W, DO-41 through-hole, 20 Ω ZZT, 5 µA IR @ 8 V | Higher power handling supports legacy through-hole designs and surge-tolerant linear regulators, but incompatible with SMT automation. | Choose for prototyping or repair where manual assembly is acceptable and 1 W dissipation is needed for transient clamping. |
Compared with BZX584C10-Q and 1N4740A, MMSZ5240BQ-7-F uniquely balances AEC-Q101 qualification, SOD123 SMT compatibility, and 370 mW ambient-rated power - making it optimal for production automotive electronics requiring zero rework risk and full traceability.
Availability
MMSZ5240BQ-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and embedded DC-DC feedback networks requiring stable component supply with full AEC-Q101 documentation and lot-level traceability.
Supply support for MMSZ5240BQ-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 portfolio coverage and vertical integration.
MMSZ5240BQ-7-F belongs to the MMSZ52xxB automotive Zener series designed specifically for AEC-Q101-compliant voltage reference and protection functions in harsh-environment electronic control units.
FAQ
What is the maximum continuous power dissipation for MMSZ5240BQ-7-F at +75°C ambient?
The device dissipates up to 500 mW at lead temperature (TL) = +75°C per datasheet Figure 1. At ambient temperature, derating begins at +25°C with RθJA = 338 °C/W, yielding ~370 mW at +25°C and ~250 mW at +75°C on standard FR-4 board.
Does MMSZ5240BQ-7-F have a specified junction capacitance value?
Yes - typical total capacitance is 15 pF at nominal Zener voltage, derived from Figure 4 in DS18010 Rev. 28, which plots CT vs. VZ and shows ~15 pF for 10 V devices. This value impacts high-frequency noise rejection in RF-adjacent power rails.
How does the temperature coefficient affect regulation accuracy over -40°C to +125°C?
Per Figure 6, MMSZ5240B exhibits +0.06 %/°C TC near 10 V. Over 165°C range, this yields ±0.99% drift, or ±99 mV from 10 V nominal - within ±5% overall tolerance band, confirming suitability for non-critical reference applications.
Is the SOD123 package compatible with IPC-7351B land pattern standards?
Yes - Diodes Incorporated's recommended SOD123 pad layout (X = 0.900 mm, X1 = 4.050 mm, Y = 0.950 mm) aligns with IPC-7351B Level B density and supports both Type II (reflow) and Type III (wave) solder processes without tombstoning or solder bridging.
MMSZ5240BQ-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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 370 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5240BQ-7-F FAQ
1.How can I place an order for MMSZ5240BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5240BQ-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 MMSZ5240BQ-7-F reliable?
The price and inventory of MMSZ5240BQ-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 MMSZ5240BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5240BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5240BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5240BQ-7-F?
MMSZ5240BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5240BQ-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 MMSZ5240BQ-7-F?
For technical support, including MMSZ5240BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5240BQ-7-F requirements.
6.How does Aetrix verify that MMSZ5240BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5240BQ-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 MMSZ5240BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5240BQ-7-F?
All MMSZ5240BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5240BQ-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 MMSZ5240BQ-7-F part is unused and in its original packaging.
Return procedure for MMSZ5240BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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