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onsemi MMSZ5252CT1G
- Part No.:
- MMSZ5252CT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5252CT1G.pdf
- Description:
- DIODE ZENER 24V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,777
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Product details
Overview
MMSZ5252CT1G from onsemi is a 24 V ±2% Zener diode in SOD−123 package, rated for 500 mW power dissipation on FR−5 board at 75°C, with 5.2 mA test current (IZT), 33 Ω dynamic impedance (ZZT), and 0.1 μA leakage current at 18 V reverse bias - used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the MMSZ5252CT1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode/anode terminal roles, automotive-grade AEC−Q101 qualification status, and direct alternatives for voltage reference design.
Technical Context
The MMSZ5252CT1G operates as a two-terminal silicon Zener diode optimized for stable reverse-biased voltage clamping and reference generation. Its 24 V nominal Zener voltage is specified under thermal equilibrium conditions (TL = 30°C ±1°C) with ±2% tolerance, ensuring tight regulation across production lots.
It exhibits 33 Ω dynamic impedance at IZT = 5.2 mA and 18 V reverse bias, enabling low-noise reference performance in feedback networks. The device supports ESD robustness to Class 3 (>16 kV HBM) and meets AEC−Q101 requirements for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 23.52 V (min) to 24.48 V (max) at IZT = 5.2 mA - defines precise clamping threshold for 24 V rail stabilization |
| Power Dissipation (PD) | 500 mW on FR−5 board at TL = 75°C - sets maximum continuous thermal load without derating |
| Zener Impedance (ZZT) | 33 Ω at IZT = 5.2 mA - determines output voltage variation under load transients |
| Leakage Current (IR) | 0.1 μA at VR = 18 V - ensures minimal quiescent current draw below regulation threshold |
| Thermal Resistance (RJA) | 340 °C/W - quantifies junction-to-ambient temperature rise per watt of dissipated power |
| ESD Rating | Class 3 (>16 kV HBM) - guarantees handling robustness during PCB assembly and field operation |
| AEC−Q101 Qualified | Yes - confirms suitability for automotive electronics requiring validated reliability and process control |
Pinout & Package
SOD−123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band; Pb−free; UL 94 V−0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased Zener terminal | Connected to regulated voltage node; conducts when input exceeds 24 V threshold |
| 2 (Anode) | Reference/ground terminal | Bonded to circuit common; establishes reference potential for Zener breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in sensor signal conditioning |
| 500 mW power rating on FR−5 | Supports stable regulation in space-constrained industrial controllers without heatsinking |
| Automotive-grade qualification | Validated for use in AEC−Q101-compliant ECUs, body control modules, and infotainment power rails |
| ESD robustness >16 kV HBM | Reduces risk of field failure in handheld test equipment and portable instrumentation |
| SOD−123 small-outline package | Allows placement in high-density PCB layouts where 0805 or larger packages are impractical |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Zener diode providing fixed 24 V reference for Wheatstone bridge biasing. Use Value: ±2% tolerance ensures <±0.5 V error in sensor output scaling, improving measurement repeatability. |
Use Scenario: Generating stable reference for LIN bus transceiver supply in door module ECUs. IC Role / Device Role / Timing Role: Voltage clamp protecting 24 V rail against load dump transients while maintaining reference integrity. Use Value: AEC−Q101 qualification and 16 kV HBM ESD rating ensure compliance with automotive EMC and reliability standards. |
| Portable Medical Instrumentation | Programmable Logic Controller I/O Protection |
Use Scenario: Regulating supply to low-power op-amps in battery-operated pulse oximeters. IC Role / Device Role / Timing Role: Low-leakage (0.1 μA at 18 V) Zener reference minimizing standby current drain. Use Value: Enables >100-hour battery life in clinical-grade devices without compromising ADC reference stability. |
Use Scenario: Clamping analog input protection circuits in PLC analog input cards. IC Role / Device Role / Timing Role: Fast-response overvoltage protector limiting transient energy into precision ADC front-end. Use Value: 33 Ω ZZT ensures <100 mV overshoot during 1 kV EFT bursts, preserving signal chain accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C24LT1G | Same 24 V ±5% tolerance, SOT−23 package, 300 mW rating, higher ZZT (60 Ω) | Limited to non-automotive consumer applications due to lack of AEC−Q101 qualification | Select when cost sensitivity outweighs precision and automotive compliance requirements |
| SZMMSZ5252CT1G | Identical electrical specs and AEC−Q101 qualification; "SZ" prefix denotes automotive-specific traceability and PPAP support | Required for Tier 1 automotive BOMs mandating full process change control and lot-level documentation | Choose for OEM automotive programs requiring certified PPAP submission and extended temperature validation |
Compared with MMSZ5252CT1G, BZX84-C24LT1G offers lower cost but sacrifices precision, thermal robustness, and automotive qualification; SZMMSZ5252CT1G provides identical performance with enhanced manufacturing traceability for safety-critical vehicle systems.
Availability
MMSZ5252CT1G is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control modules, portable medical instrumentation, and programmable logic controller I/O protection requiring stable component supply and long-term lifecycle assurance.
Supply support for MMSZ5252CT1G 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
onsemi is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MMSZ52xxxT1G series was designed to deliver high-precision, surface-mount Zener voltage regulation for space-constrained, high-reliability applications - particularly where ±2% tolerance, AEC−Q101 compliance, and low-leakage operation are mandatory.
FAQ
What is the Zener voltage tolerance of the MMSZ5252CT1G?
The MMSZ5252CT1G has a ±2% Zener voltage tolerance, meaning its nominal 24 V Zener voltage is guaranteed between 23.52 V and 24.48 V at IZT = 5.2 mA and thermal equilibrium (TL = 30°C ±1°C). This tighter tolerance than the "B" suffix variants enables higher-accuracy voltage references in precision analog designs without calibration.
Does the MMSZ5252CT1G meet automotive qualification standards?
Yes, the MMSZ5252CT1G is AEC−Q101 qualified and PPAP capable, confirming its suitability for automotive applications such as body control modules and infotainment power supplies. It undergoes rigorous stress testing including temperature cycling, humidity bias, and ESD verification to meet automotive reliability requirements.
What is the maximum power dissipation of the MMSZ5252CT1G on a standard PCB?
The MMSZ5252CT1G is rated for 500 mW total power dissipation on an FR−5 board at TL = 75°C, with linear derating of 6.7 mW/°C above that temperature. This rating assumes minimum recommended footprint and no additional copper pour; actual dissipation must be verified using thermal simulation for specific layout conditions.
How does the leakage current of the MMSZ5252CT1G compare to other 24 V Zeners?
The MMSZ5252CT1G specifies only 0.1 μA reverse leakage current at VR = 18 V, significantly lower than many competing 24 V Zeners (e.g., BZX84-C24LT1G: 0.5 μA at 18 V). This ultra-low leakage minimizes parasitic current paths in battery-powered instrumentation and high-impedance sensor interfaces.
What package type is used for the MMSZ5252CT1G, and what are its key mechanical features?
The MMSZ5252CT1G uses the SOD−123 surface-mount package (1.60 × 2.69 × 1.16 mm), featuring a void-free thermosetting plastic case, corrosion-resistant solderable finish, UL 94 V−0 flammability rating, and cathode polarity band marking. It supports reflow soldering up to 260°C for 10 seconds.
MMSZ5252CT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- MMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±2%
- 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:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5252CT1G FAQ
1.How can I place an order for MMSZ5252CT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5252CT1G 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 MMSZ5252CT1G reliable?
The price and inventory of MMSZ5252CT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5252CT1G is usually 5 days.
3.What payment methods are accepted for MMSZ5252CT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5252CT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5252CT1G?
MMSZ5252CT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5252CT1G 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 MMSZ5252CT1G?
For technical support, including MMSZ5252CT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5252CT1G requirements.
6.How does Aetrix verify that MMSZ5252CT1G is sourced from the original manufacturer or authorized distributors?
All MMSZ5252CT1G 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 MMSZ5252CT1G meets industry standards.
7.What is the process for return or replacement of MMSZ5252CT1G?
All MMSZ5252CT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5252CT1G, 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 MMSZ5252CT1G part is unused and in its original packaging.
Return procedure for MMSZ5252CT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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