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onsemi SZMM5Z24VT1G
- Part No.:
- SZMM5Z24VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z24VT1G.pdf
- Description:
- DIODE ZENER 24V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,637
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Product details
Overview
SZMM5Z24VT1G from onsemi is a 24.2 V nominal Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation, ±5% voltage tolerance at 5 mA test current, and 70 Ω maximum Zener impedance at IZT. It provides precision voltage regulation and overvoltage clamping in space-constrained portable electronics such as smartphone power rails and USB interface protection circuits.
For engineers reviewing the SZMM5Z24VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 24.2 V Zener voltage with ±5% tolerance, 500 mW power rating on FR-4 board, 16.8 mV/°C temperature coefficient, 80 pF capacitance at 0 V, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference and transient clamp, leveraging avalanche breakdown in silicon PN junction. Its 24.2 V nominal Zener voltage is specified at IZT = 5 mA with 22.8 V minimum and 25.6 V maximum across production lot, and exhibits 70 Ω dynamic impedance at that bias point.
Thermal derating follows a linear 4.0 mW/°C reduction above 25 °C ambient, with RJA = 250 °C/W on FR-4 board. The SOD-523 package enables mounting in any orientation, supports 260 °C reflow, and meets MSL 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24.2 V nominal, 22.8–25.6 V range at IZT = 5 mA - defines clamping threshold for overvoltage protection |
| Power Rating (PD) | 500 mW at TA = 25 °C - sets maximum continuous dissipation on standard FR-4 PCB |
| Zener Impedance (ZZT) | 70 Ω max at IZT = 5 mA - determines regulation stiffness under varying load current |
| Temp Coefficient (αVZ) | +16.8 mV/°C - quantifies voltage drift with ambient temperature change |
| Capacitance (C) | 80 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity |
| ESD Rating | Class 3 (>16 kV HBM) - ensures robustness against human-body electrostatic discharge events |
| Leakage Current (IR) | 0.05 μA max at VR = 18.4 V - defines off-state current in voltage-sensing or low-power standby paths |
Pinout & Package
SOD-523 surface-mount package: 1.20 mm × 0.80 mm body, 0.60 mm height, matte tin lead finish, void-free thermosetting epoxy case meeting UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output or protected node; reverse-biased during Zener operation |
| 2 | Anode | Connected to ground or lower-potential reference; completes current path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and infotainment power supplies |
| Pb-Free & RoHS Compliant | Meets global environmental compliance mandates without compromising solderability or thermal performance |
| High ESD Robustness | Withstands >16 kV per Human Body Model - reduces need for external ESD protection in handheld interfaces |
| Miniature SOD-523 Footprint | 1.20 mm × 0.80 mm area - enables placement in tight spaces like camera modules and SIM card slots |
| Low Profile (0.60 mm) | Minimizes z-height interference in stacked PCB assemblies and ultra-thin mobile devices |
Applications
| USB 3.0 Power Rail Protection | Automotive Infotainment Display Bias |
|---|---|
|
Use Scenario: Clamping transient surges on VBUS line during hot-plug events in portable USB peripherals. IC Role / Device Role / Timing Role: Two-terminal shunt regulator acting as primary overvoltage clamp before downstream LDOs or USB transceivers. Use Value: Prevents damage to 24 V-tolerant USB PHYs using its precise 24.2 V breakdown and 500 mW surge-handling capability. |
Use Scenario: Providing stable 24 V reference for LED backlight drivers in automotive LCD clusters. IC Role / Device Role / Timing Role: Precision voltage reference source for current-setting resistors in constant-current LED strings. Use Value: Maintains consistent brightness across temperature via +16.8 mV/°C coefficient matched to driver IC compensation. |
| Smartphone Camera Module ESD Clamp | Industrial Sensor Signal Conditioning |
|
Use Scenario: Protecting MIPI CSI-2 data lines and power pins from ESD events during assembly and field use. IC Role / Device Role / Timing Role: Low-capacitance (80 pF) shunt clamp placed directly at connector entry points. Use Value: Preserves signal integrity up to 1 GHz while surviving >16 kV HBM discharges without degradation. |
Use Scenario: Stabilizing excitation voltage for 4–20 mA loop-powered pressure transmitters in factory automation. IC Role / Device Role / Timing Role: Secondary voltage reference in analog front-end, regulating op-amp supply rail against supply ripple. Use Value: Enables <±0.1% full-scale accuracy by limiting reference drift to <±0.42 V over −40 to +125 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C24LT1G | 24 V nominal, ±5%, 300 mW rating, SOD-523, 100 Ω ZZT, 100 pF capacitance | Lower power handling and higher impedance reduce clamping effectiveness in high-energy transients | Select when cost sensitivity outweighs surge margin and tighter regulation is not required |
| MMSZ5248BT1G | 24 V nominal, ±5%, 500 mW rating, SOD-123, 30 Ω ZZT, 40 pF capacitance, no AEC-Q101 | Larger SOD-123 footprint and lack of automotive qualification limit use to commercial-grade systems | Choose for improved regulation stiffness and lower capacitance where board space permits and automotive compliance is unnecessary |
Compared with BZX584C24LT1G and MMSZ5248BT1G, SZMM5Z24VT1G uniquely combines AEC-Q101 qualification, 500 mW power, and SOD-523 miniaturization-making it the only option qualified for automotive under-hood sensor interfaces requiring both size and reliability.
Availability
SZMM5Z24VT1G is available at Aetrix Electronics and suitable for USB power protection, automotive display biasing, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SZMM5Z24VT1G 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 supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMM5Z24VT1G belongs to the MM5Z/SZMM5Z series of miniature Zener regulators designed specifically for high-density portable and automotive electronics where space, reliability, and ESD immunity are critical.
FAQ
What is the Zener voltage tolerance of SZMM5Z24VT1G?
The SZMM5Z24VT1G has a nominal Zener voltage of 24.2 V with a tolerance of ±5% at IZT = 5 mA, corresponding to a guaranteed range of 22.8 V to 25.6 V. This tolerance is verified per onsemi's standard test conditions and applies across the full operating temperature range of −65 °C to +150 °C.
Is SZMM5Z24VT1G suitable for automotive applications?
Yes, SZMM5Z24VT1G is AEC-Q101 qualified and PPAP capable, with manufacturing site and process controls meeting automotive requirements. Its SOD-523 package, 16 kV HBM ESD rating, and operation up to +150 °C junction temperature make it appropriate for engine control units, ADAS sensors, and infotainment power rails.
What is the maximum power dissipation for SZMM5Z24VT1G on a standard PCB?
SZMM5Z24VT1G delivers 500 mW steady-state power dissipation on an FR-4 board at TA = 25 °C. Above 25 °C, power must be linearly derated at 4.0 mW/°C, reaching zero at 150 °C ambient - consistent with its RJA = 250 °C/W thermal resistance specification.
How does the temperature coefficient affect SZMM5Z24VT1G's regulation accuracy?
SZMM5Z24VT1G has a temperature coefficient of +16.8 mV/°C, meaning its Zener voltage increases by approximately 16.8 mV for every 1 °C rise in junction temperature. Over a −40 °C to +125 °C range, this contributes up to ±2.77 V drift - a key factor in precision reference designs requiring external compensation.
What packaging and marking details apply to SZMM5Z24VT1G?
SZMM5Z24VT1G is supplied in Pb-free SOD-523 tape-and-reel packaging (3,000 units per reel). Its top-side marking is "11", indicating the 24 V variant within the SZMM5ZxxxT1G series, with cathode identified by a polarity band adjacent to pin 1.
SZMM5Z24VT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.8 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-523
SZMM5Z24VT1G FAQ
1.How can I place an order for SZMM5Z24VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z24VT1G 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 SZMM5Z24VT1G reliable?
The price and inventory of SZMM5Z24VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z24VT1G is usually 5 days.
3.What payment methods are accepted for SZMM5Z24VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z24VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z24VT1G?
SZMM5Z24VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z24VT1G 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 SZMM5Z24VT1G?
For technical support, including SZMM5Z24VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z24VT1G requirements.
6.How does Aetrix verify that SZMM5Z24VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z24VT1G 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 SZMM5Z24VT1G meets industry standards.
7.What is the process for return or replacement of SZMM5Z24VT1G?
All SZMM5Z24VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z24VT1G, 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 SZMM5Z24VT1G part is unused and in its original packaging.
Return procedure for SZMM5Z24VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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