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Diodes Incorporated MMSZ5252B-7-F
- Part No.:
- MMSZ5252B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5252B-7-F.pdf
- Description:
- DIODE ZENER 24V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:13,919
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Product details
Overview
MMSZ5252B-7-F from Diodes Incorporated is a 24 V, 5.2 mA nominal Zener diode in SOD-123 package with 500 mW power dissipation, 33 Ω dynamic impedance at test current, and 0.1 µA reverse leakage at 18 V, used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the MMSZ5252B-7-F datasheet, MMSZ5252B-7-F pinout, MMSZ5252B-7-F application, or MMSZ5252B-7-F equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (338 °C/W), cathode-band polarity marking, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 24 V nominal Zener voltage is specified at 5.2 mA test current, with ±5% tolerance (22.8–25.2 V) and a positive temperature coefficient of +0.08 %/°C per Figure 6.
The device uses silicon PN-junction construction with matte tin-plated alloy 42 leadframe and green molding compound compliant with RoHS, halogen-free, and antimony-free standards. It is rated for -65 °C to +150 °C operating temperature and exhibits 600 Ω maximum knee impedance at 0.25 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V nominal, 22.8–25.2 V range at 5.2 mA - defines regulated output voltage window for reference design |
| Power Dissipation | 500 mW @ TL = +75 °C - sets maximum continuous power handling on PCB with thermal land |
| Zener Impedance (ZZT) | 33 Ω @ IZT = 5.2 mA - determines AC regulation error under small-signal load variation |
| Reverse Leakage (IR) | 0.1 µA @ VR = 18 V - ensures minimal quiescent current in standby bias networks |
| Thermal Resistance (RθJA) | 338 °C/W - quantifies junction-to-ambient temperature rise per watt on FR-4 board with 1-inch copper pad |
| Package | SOD-123 - surface-mount outline with 2.65 mm body width, 1.55 mm length, and cathode band polarity marking |
| AEC-Q101 Qualified | Yes - validated for automotive electronics applications requiring high-reliability stress testing |
Pinout & Package
Two-terminal device in SOD-123 plastic package with cathode band marking. Terminals are anode (unmarked end) and cathode (band-marked end); no internal circuitry or control logic.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to lower-potential side of bias resistor; forms return path during reverse regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to load or feedback node; maintains stable 24 V relative to anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power rating at lead temperature | Enables use in higher-current reference designs without derating below +75 °C ambient |
| AEC-Q101 qualification | Validates robustness for automotive infotainment, body control, and sensor interface modules |
| Green, halogen- and antimony-free construction | Meets strict environmental compliance (RoHS 2, JEDEC J-STD-020 Level 1) for global OEM supply chains |
| Cathode band polarity marking | Ensures unambiguous orientation during automated pick-and-place assembly and visual inspection |
| Matte tin finish on alloy 42 leadframe | Guarantees reliable solderability per MIL-STD-202 Method 208 and compatibility with lead-free reflow profiles |
Applications
| Industrial Sensor Signal Conditioning | Automotive Cabin Temperature Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for RTD or thermistor bridges in programmable logic controllers. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end ADC biasing. Use Value: Maintains 24 V ±5% over -40 °C to +125 °C, minimizing gain drift in 16-bit measurement systems. |
Use Scenario: Providing stable reference for HVAC microcontroller ADC inputs in dashboard climate modules. IC Role / Device Role / Timing Role: Zener-regulated voltage source for ratiometric sensor scaling. Use Value: Delivers <0.1 µA leakage at 18 V, reducing battery drain in always-on vehicle subsystems. |
| Low-Power IoT Node Voltage Clamp | Medical Diagnostic Equipment Bias Supply |
Use Scenario: Clamping input protection for BLE SoC GPIOs exposed to transient ESD events. IC Role / Device Role / Timing Role: Transient voltage suppressor with defined clamping threshold. Use Value: Activates at 24 V with 33 Ω dynamic impedance, limiting overshoot to <26 V during 1 kV HBM pulses. |
Use Scenario: Generating stable bias for photodiode transimpedance amplifier in portable pulse oximeters. IC Role / Device Role / Timing Role: Low-noise DC reference for analog signal chain calibration. Use Value: Achieves <10 ppm/°C effective TC via matched resistor divider, meeting IEC 60601-1 stability requirements. |
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-C24 (Nexperia) | 24 V ±5%, 300 mW PD, 40 Ω ZZT, SOD-323 package | Lower power rating and smaller footprint; unsuitable for >100 mA bias networks | Select when board space is constrained and thermal budget allows 300 mW operation |
| MMBZ5252BS (ON Semiconductor) | 24 V ±5%, 350 mW PD, 35 Ω ZZT, SOT-23 package with three terminals | Includes substrate connection; requires different layout and has higher RθJA (400 °C/W) | Choose only if existing SOT-23 footprint reuse is mandatory and derating to 350 mW is acceptable |
Compared with BZX584-C24 and MMBZ5252BS, MMSZ5252B-7-F offers superior thermal performance (338 °C/W vs. ≥400 °C/W), higher power headroom (500 mW), and automotive qualification-making it optimal for thermally demanding, safety-critical, or high-volume industrial designs.
Availability
MMSZ5252B-7-F is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive cabin electronics, low-power IoT protection, and medical diagnostic equipment requiring stable component supply and full traceability.
Supply support for MMSZ5252B-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.
MMSZ5252B-7-F belongs to the MMSZ52xxB series of 500 mW Zener diodes designed for precision voltage reference and regulation in space-constrained, high-stability applications where AEC-Q101 compliance and green material content are required.
FAQ
What is the maximum reverse voltage before breakdown for MMSZ5252B-7-F?
The nominal Zener voltage is 24 V with a guaranteed range of 22.8 V to 25.2 V at 5.2 mA test current. Breakdown begins gradually above 22.8 V; full regulation occurs within this band. The device is not rated for sustained operation above 25.2 V in reverse bias without exceeding power limits.
Can MMSZ5252B-7-F be used in place of a 24 V Zener with tighter tolerance?
No-it has a fixed ±5% tolerance (22.8–25.2 V). For tighter tolerance, consider the BZX84-C24 (±2%) or TL431-based shunt references. MMSZ5252B-7-F is optimized for cost-sensitive, high-volume applications where ±5% meets system-level accuracy requirements.
Is the SOD-123 package compatible with standard reflow profiles?
Yes-the matte tin finish and green molding compound support industry-standard lead-free reflow profiles (J-STD-020 Level 1). Peak temperature must not exceed 260 °C, and time above 217 °C should be limited to 60–150 seconds per IPC/JEDEC specifications.
Does MMSZ5252B-7-F require a series current-limiting resistor in all applications?
Yes-Zener diodes require external current limiting to prevent thermal runaway. For 24 V regulation from a 30 V supply, a minimum 120 Ω resistor is needed to limit current to ≤50 mA at maximum power (500 mW), assuming worst-case VZ and ambient conditions.
MMSZ5252B-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):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 33 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 18 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
MMSZ5252B-7-F FAQ
1.How can I place an order for MMSZ5252B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5252B-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 MMSZ5252B-7-F reliable?
The price and inventory of MMSZ5252B-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 MMSZ5252B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5252B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5252B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5252B-7-F?
MMSZ5252B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5252B-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 MMSZ5252B-7-F?
For technical support, including MMSZ5252B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5252B-7-F requirements.
6.How does Aetrix verify that MMSZ5252B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5252B-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 MMSZ5252B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5252B-7-F?
All MMSZ5252B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5252B-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 MMSZ5252B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5252B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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