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onsemi SZMM5Z24VT5G
- Part No.:
- SZMM5Z24VT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z24VT5G.pdf
- Description:
- DIODE ZENER 24.2V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,165
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Product details
Overview
SZMM5Z24VT5G from onsemi is a 24.2 V nominal Zener voltage regulator diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with ±5% tolerance (22.8–25.6 V), 70 Ω max Zener impedance at 5 mA test current, and 16.8 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z24VT5G datasheet, pinout, applications, or equivalent options, key selection factors include its AEC-Q101 qualification, 16 kV HBM ESD rating, low-profile 1.20 mm × 0.80 mm × 0.60 mm footprint, and automotive-grade traceability under PPAP-capable manufacturing.
Technical Context
This device operates as a two-terminal, silicon planar Zener diode optimized for reverse-bias voltage regulation. Its breakdown mechanism is controlled avalanche at 24.2 V nominal, with stable regulation maintained across −65 °C to +150 °C junction temperature range and thermal resistance of 250 °C/W (Junction-to-Ambient, FR-4 board).
It features a 100% matte tin lead finish, void-free thermosetting plastic case compliant with UL 94 V-0, and meets MSL 1 reflow requirements up to 260 °C. The cathode-anode polarity is marked by a band on terminal 1, consistent with SOD-523 Style 1 mechanical outline.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8 V min / 24.2 V nom / 25.6 V max @ IZT = 5 mA - defines tight regulation window for 24 V rail clamping |
| Power Dissipation (PD) | 500 mW @ TA = 25 °C - supports continuous operation in handheld PCBs with minimal heatsinking |
| Zener Impedance (ZZT) | 70 Ω max @ IZT = 5 mA - ensures low dynamic resistance for stable reference under load transients |
| Temperature Coefficient | ±16.8 mV/°C - enables predictable drift compensation in automotive ambient temperature swings |
| ESD Rating (HBM) | >16 kV - eliminates need for external ESD protection in USB-powered or touch-interface designs |
| Leakage Current (IR) | 0.05 μA max @ VR = 18.4 V - guarantees minimal standby power loss in battery-critical applications |
| Capacitance (C) | 80 pF max @ VR = 0 V, f = 1 MHz - preserves signal integrity in high-frequency bias networks |
Pinout & Package
SOD-523 surface-mount package: 1.20 mm × 0.80 mm body, 0.60 mm height, matte Sn finish, MSL 1, reflow-compatible to 260 °C. Cathode marked with polarity band on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded) | Cathode | Connected to regulated voltage node; reverse-bias anode-to-cathode voltage establishes Zener conduction |
| 2 | Anode | Typically grounded or tied to lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive under-hood and infotainment systems requiring PPAP documentation and site-controlled change management |
| Ultra-Small Footprint | 1.20 mm × 0.80 mm area - enables placement in 0.5 mm pitch routing zones on HDI mobile PCBs |
| High ESD Robustness | Class 3 HBM (>16 kV) - eliminates discrete TVS co-placement in ESD-prone USB/UART interface rails |
| Pb-Free & RoHS Compliant | 100% matte Sn termination with UL 94 V-0 epoxy - satisfies global environmental compliance without derating |
| Low Profile Height | 0.60 mm max - avoids interference with stacked shields or flex-to-board connectors in slim form factors |
Applications
| Automotive Infotainment Power Rail Clamping | USB-C Port Overvoltage Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply lines feeding display controllers and audio amplifiers in vehicle head units against load dump spikes. IC Role / Device Role / Timing Role: Two-terminal shunt regulator clamping transient excursions above 25.6 V while sinking up to 20.8 mA peak current. Use Value: Prevents latch-up or permanent damage to downstream PMICs without adding series resistance or delay. |
Use Scenario: Safeguarding USB-C CC logic and VCONN circuitry from accidental 24 V misconnection during hot-plug events. IC Role / Device Role / Timing Role: Fast-acting Zener clamp activated within nanoseconds of overvoltage onset, limiting voltage to ≤25.6 V. Use Value: Maintains USB PD negotiation integrity by avoiding false VBUS detection and preserving CC line signaling fidelity. |
| Portable Medical Sensor Bias Reference | Industrial IoT Node Battery Monitoring |
|
Use Scenario: Providing stable 24.2 V reference for analog front-end gain calibration in handheld ultrasound probes. IC Role / Device Role / Timing Role: Precision voltage reference source with <±0.5% initial tolerance and low TC drift over −20 °C to +60 °C. Use Value: Enables sub-0.1% gain accuracy in ADC signal chains without trimming or active regulation. |
Use Scenario: Monitoring Li-ion pack voltage in edge gateways using resistive divider feedback into MCU ADC. IC Role / Device Role / Timing Role: Low-leakage (0.05 μA) Zener reference stabilizing divider ratio against temperature-induced resistor drift. Use Value: Extends battery life by reducing quiescent current vs. LDO-based references while maintaining ±1% measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C24LT1G | Same 24 V nominal, but ±5% tolerance, 300 mW PD, SOD-323 package (1.7 mm × 1.3 mm) | Larger footprint; lower power rating limits sustained clamp duty cycle | Choose when legacy SOD-323 layout exists and 500 mW derating is not required |
| MMSZ5242BT1G | 24 V nominal, ±5%, 500 mW, but SOD-123 package (3.7 mm × 1.6 mm) and higher ZZT (100 Ω) | 3× larger board area; higher impedance reduces regulation stability under fast transients | Prefer only if existing SOD-123 tooling or higher surge current handling is prioritized over size |
Compared with BZX584C24LT1G and MMSZ5242BT1G, SZMM5Z24VT5G delivers identical voltage accuracy in the smallest possible footprint with superior thermal performance and ESD robustness - making it optimal for next-generation compact, automotive-grade, and battery-sensitive designs.
Availability
SZMM5Z24VT5G is available at Aetrix Electronics and suitable for automotive infotainment systems, USB-C peripheral protection, and portable medical sensor biasing requiring stable component supply, full AEC-Q101 traceability, and Pb-free compliance.
Supply support for SZMM5Z24VT5G 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.
SZMM5Z24VT5G belongs to the MM5ZxxxT1G/SZMM5ZxxxT1G family - engineered specifically for ultra-compact, high-reliability voltage regulation in space- and weight-constrained portable and automotive electronics.
FAQ
What is the Zener voltage tolerance of SZMM5Z24VT5G?
SZMM5Z24VT5G has a standard tolerance of ±5% around its nominal 24.2 V Zener voltage, resulting in a guaranteed regulation range of 22.8 V to 25.6 V at 5 mA test current (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (Rev. 19, April 2025), and applies across the full operating temperature range.
Is SZMM5Z24VT5G qualified for automotive use?
Yes, SZMM5Z24VT5G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes automotive-grade manufacturing with unique site and control change requirements, including enhanced process controls and full traceability for automotive OEM applications.
What is the maximum power dissipation for SZMM5Z24VT5G at 85 °C ambient?
At 85 °C ambient, SZMM5Z24VT5G's maximum power dissipation is 260 mW. This is calculated using the 4.0 mW/°C derating factor from the datasheet's Maximum Ratings table: 500 mW − (85 − 25) × 4.0 mW = 260 mW. Derating assumes mounting on a single-sided FR-4 board with 1 cm² copper pad.
Does SZMM5Z24VT5G have a polarity marking, and how is it oriented?
Yes, SZMM5Z24VT5G uses SOD-523 Style 1 packaging with a cathode polarity band on terminal 1. As shown in the Marking Diagram on page 4 of the datasheet, the banded end is the cathode, and terminal 2 is the anode. This orientation is critical for correct reverse-bias connection in voltage regulation circuits.
What is the Zener impedance of SZMM5Z24VT5G at its test current?
The maximum Zener impedance (ZZT) of SZMM5Z24VT5G is 70 Ω at IZT = 5 mA and TA = 25 °C, per the Electrical Characteristics table on page 3. This low dynamic resistance ensures minimal output voltage variation under changing load conditions, supporting stable reference performance in precision analog circuits.
SZMM5Z24VT5G 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):
- 24.2 V
- Tolerance:
- ±5.79%
- 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z24VT5G FAQ
1.How can I place an order for SZMM5Z24VT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z24VT5G 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 SZMM5Z24VT5G reliable?
The price and inventory of SZMM5Z24VT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z24VT5G is usually 5 days.
3.What payment methods are accepted for SZMM5Z24VT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z24VT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z24VT5G?
SZMM5Z24VT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z24VT5G 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 SZMM5Z24VT5G?
For technical support, including SZMM5Z24VT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z24VT5G requirements.
6.How does Aetrix verify that SZMM5Z24VT5G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z24VT5G 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 SZMM5Z24VT5G meets industry standards.
7.What is the process for return or replacement of SZMM5Z24VT5G?
All SZMM5Z24VT5G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z24VT5G, 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 SZMM5Z24VT5G part is unused and in its original packaging.
Return procedure for SZMM5Z24VT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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