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onsemi MMSZ5250CT1G
- Part No.:
- MMSZ5250CT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5250CT1G.pdf
- Description:
- DIODE ZENER 20V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,804
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Product details
Overview
MMSZ5250CT1G from onsemi is a 20 V ±2% tolerance Zener diode in SOD−123 package, rated for 500 mW power dissipation at 75°C ambient, with 6.2 mA test current (IZT), 25 Ω dynamic impedance (ZZT), and 0.1 µA reverse leakage at 15 V (VR). It serves as a precision voltage reference or overvoltage clamp in low-power analog sensing and power supply feedback paths.
For engineers reviewing the MMSZ5250CT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 2% Zener voltage tolerance, low 25 Ω impedance at 6.2 mA, thermal equilibrium–tested VZ specification, and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage regulator diode, conducting in reverse bias above its nominal 20 V Zener voltage with specified dynamic impedance of 25 Ω at IZT = 6.2 mA and 600 Ω at IZK = 0.25 mA. Its junction-to-ambient thermal resistance is 340 °C/W on FR−5 board, limiting continuous power to 500 mW at TL = 75°C with linear derating beyond that point.
The MMSZ5250CT1G features a cathode-indicated polarity band, Pb−free SOD−123 plastic package (1.60 × 2.69 × 1.16 mm), and ESD rating >16 kV per Human Body Model. It is characterized at thermal equilibrium (TL = 30°C ±1°C), ensuring stable VZ measurement conditions across production lots.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.6 V min / 20 V nom / 20.4 V max @ IZT = 6.2 mA - enables precise 20 V reference with ±2% tolerance for feedback loop stability |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - supports sustained operation in compact PCB layouts without forced cooling |
| Zener Impedance (ZZT) | 25 Ω @ IZT = 6.2 mA - ensures minimal output voltage variation under load transients in regulation circuits |
| Reverse Leakage (IR) | 0.1 µA @ VR = 15 V - guarantees negligible current draw in standby mode of battery-powered systems |
| Thermal Resistance (RJA) | 340 °C/W - defines maximum temperature rise per watt; requires thermal pad design for >300 mW use |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during automated assembly and field operation |
| Junction Temp Range | −55°C to +150°C - validated for under-hood automotive and industrial control environments |
Pinout & Package
SOD−123 surface-mount package (Case 425, Style 1), 2-lead, dimensions 1.60 × 2.69 × 1.16 mm; cathode indicated by polarity band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables direct replacement in high-accuracy feedback networks without resistor trimming |
| 500 mW power rating on FR−5 board | Supports higher current regulation than standard 250 mW Zeners in same footprint |
| Thermal equilibrium–specified VZ | Eliminates batch-to-batch drift caused by self-heating during test, improving production yield |
| AEC−Q101 qualified | Validated for automotive applications including body electronics and sensor modules |
| Pb−free and RoHS compliant | Meets global environmental compliance requirements for industrial and consumer end equipment |
Applications
| Automotive Sensor Reference | Industrial Power Supply Feedback |
|---|---|
Use Scenario: Providing stable 20 V reference for analog signal conditioning in engine coolant temperature sensors. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for op-amp input biasing and ADC reference scaling. Use Value: Tight ±2% tolerance and −55°C to +150°C operation ensure consistent sensor accuracy across full vehicle operating range. |
Use Scenario: Regulating feedback voltage in isolated flyback converter secondary-side error amplifier. IC Role / Device Role / Timing Role: Shunt regulator clamping optocoupler LED current to maintain precise output voltage setpoint. Use Value: Low 25 Ω ZZT minimizes output voltage deviation during line/load transients, improving regulation accuracy. |
| Portable Medical Device Clamp | IoT Node Overvoltage Protection |
Use Scenario: Clamping ECG front-end amplifier input to prevent damage from electrostatic discharge events. IC Role / Device Role / Timing Role: Transient voltage suppressor placed before instrumentation amplifier inputs. Use Value: >16 kV HBM ESD rating and fast Zener turn-on protect sensitive analog circuitry without adding series resistance. |
Use Scenario: Protecting 3.3 V MCU GPIO pins from accidental 24 V miswiring in smart building sensor nodes. IC Role / Device Role / Timing Role: Standby-mode shunt limiter diverting excess voltage to ground before IC damage threshold. Use Value: 0.1 µA leakage at 15 V ensures no measurable impact on battery life in always-on monitoring applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C20 | 20 V ±5%, 300 mW rating, SOD-323 package (smaller footprint, higher RJA) | Limited to lower-power applications due to 300 mW limit and less stable thermal characterization | Select when board space is critical and ±5% tolerance is acceptable; verify thermal margin at 6.2 mA |
| SZMMSZ5250CT1G | Identical electrical specs, AEC−Q101 certified with enhanced PPAP documentation support | Required for Tier-1 automotive programs needing full change control and lot traceability | Choose for automotive production where manufacturer site qualification and PPAP submission are mandatory |
Compared with BZX584C20 and SZMMSZ5250CT1G, the MMSZ5250CT1G delivers optimal balance of 2% tolerance, 500 mW capability, and industrial-grade reliability-making it preferred for non-automotive high-accuracy regulation where cost and qualification overhead must be minimized.
Availability
MMSZ5250CT1G is available at Aetrix Electronics and suitable for automotive sensor references, industrial power supply feedback loops, portable medical device clamping, and IoT node overvoltage protection requiring stable component supply across multi-year production cycles.
Supply support for MMSZ5250CT1G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ52xxxT1G series was designed for general-purpose, medium-current Zener regulation in space-constrained surface-mount applications-emphasizing thermal stability, tight tolerance options, and automotive qualification readiness.
FAQ
What is the Zener voltage tolerance of the MMSZ5250CT1G?
The MMSZ5250CT1G has a ±2% Zener voltage tolerance, with a nominal value of 20 V and guaranteed range of 19.6 V to 20.4 V at IZT = 6.2 mA and thermal equilibrium (TL = 30°C ±1°C). This tighter tolerance compared to the "B" suffix variants supports higher-precision voltage references in feedback and sensing circuits without external trimming.
How does the MMSZ5250CT1G differ from the MMSZ5250BT1G?
The MMSZ5250CT1G differs from the MMSZ5250BT1G primarily in Zener voltage tolerance: the "C" suffix denotes ±2%, while the "B" suffix specifies ±5%. Both share identical SOD−123 packaging, 500 mW rating, and thermal characteristics-but only the MMSZ5250CT1G meets tighter regulation requirements in analog signal chains and closed-loop power supplies.
What is the maximum reverse leakage current for the MMSZ5250CT1G?
The MMSZ5250CT1G exhibits a maximum reverse leakage current (IR) of 0.1 µA at VR = 15 V and TA = 25°C. This ultra-low leakage ensures minimal parasitic loading in high-impedance reference nodes and extends battery life in always-on portable electronics where the MMSZ5250CT1G is used for voltage clamping or biasing.
Is the MMSZ5250CT1G suitable for automotive applications?
Yes-the MMSZ5250CT1G is not AEC−Q101 qualified, but its automotive-grade counterpart SZMMSZ5250CT1G is fully qualified and PPAP-capable. The MMSZ5250CT1G shares identical electrical and thermal specifications and is widely used in non-safety-critical automotive subsystems such as cabin sensors and infotainment power rails where full qualification is not mandated.
What is the Zener impedance of the MMSZ5250CT1G at its test current?
The MMSZ5250CT1G has a maximum Zener impedance (ZZT) of 25 Ω measured at IZT = 6.2 mA with 1 kHz AC signal (IZ(AC) = 0.1 × IZ(DC)). This low dynamic impedance ensures stable regulation under varying load conditions and makes the MMSZ5250CT1G suitable for applications demanding minimal output voltage ripple in feedback networks.
MMSZ5250CT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- MMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 15 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
MMSZ5250CT1G FAQ
1.How can I place an order for MMSZ5250CT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5250CT1G 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 MMSZ5250CT1G reliable?
The price and inventory of MMSZ5250CT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5250CT1G is usually 5 days.
3.What payment methods are accepted for MMSZ5250CT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5250CT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5250CT1G?
MMSZ5250CT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5250CT1G 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 MMSZ5250CT1G?
For technical support, including MMSZ5250CT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5250CT1G requirements.
6.How does Aetrix verify that MMSZ5250CT1G is sourced from the original manufacturer or authorized distributors?
All MMSZ5250CT1G 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 MMSZ5250CT1G meets industry standards.
7.What is the process for return or replacement of MMSZ5250CT1G?
All MMSZ5250CT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5250CT1G, 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 MMSZ5250CT1G part is unused and in its original packaging.
Return procedure for MMSZ5250CT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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