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onsemi SZMM3Z24VT1G
- Part No.:
- SZMM3Z24VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z24VT1G.pdf
- Description:
- DIODE ZENER 24.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:840
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Product details
Overview
SZMM3Z24VT1G from onsemi is a 24.2 V nominal Zener voltage regulator diode in SOD−323 package, rated for 300 mW steady-state power dissipation at 25°C, with 70 Ω maximum Zener impedance at 5 mA test current and 0.05 µA reverse leakage at 16.8 V. It provides precision voltage reference and overvoltage clamping in space-constrained portable electronics.
For engineers reviewing the SZMM3Z24VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±0.8 V), thermal resistance (416 °C/W), ESD rating (>16 kV HBM), automotive qualification (AEC−Q101), and Pb−free SOD−323 footprint compatibility.
Technical Context
This device operates as a two-terminal voltage reference, conducting in reverse bias above its specified Zener breakdown voltage. Its regulation performance depends on stable test current (IZT = 5 mA) and is characterized by low dynamic impedance (ZZT ≤ 70 Ω) and tight voltage tolerance (22.8 V to 25.6 V).
Designed for surface-mount use on FR−4 PCBs, it features a 1.7 mm × 1.25 mm body with 0.9 mm height, cathode band polarity marking, and UL 94 V−0 flammability rating. Thermal derating begins at 2.4 mW/°C above 25°C ambient.
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 regulated output range under standard test conditions |
| Power Dissipation (PD) | 300 mW @ TA = 25°C - maximum continuous power before thermal derating applies |
| Zener Impedance (ZZT) | ≤ 70 Ω @ IZT = 5 mA - determines voltage stability under load transients |
| Reverse Leakage (IR) | ≤ 0.05 µA @ VR = 16.8 V - ensures minimal standby current in clamp configurations |
| ESD Rating | >16 kV per Human Body Model - supports robust handling in automated assembly and end-use environments |
| Operating Temperature | −65°C to +150°C - enables deployment in automotive under-hood and industrial control applications |
| Capacitance | 80 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
Pinout & Package
SZMM3Z24VT1G is housed in a Pb−free SOD−323 (Case 477) surface-mount plastic package measuring 1.7 mm × 1.25 mm × 0.9 mm, with void-free transfer-molded construction, corrosion-resistant finish, and UL 94 V−0 flammability rating. Mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated Output Terminal | Connected to reference node; voltage develops across cathode-to-anode; polarity band identifies this terminal |
| 2 (Anode) | Reference Ground / Return Path | Typically tied to system ground or lower-potential rail; completes Zener conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive applications including engine control units and infotainment power rails |
| Low Profile (0.9 mm height) | Enables stacking under shields or placement in ultra-thin mobile PCB assemblies |
| High ESD Robustness (>16 kV HBM) | Reduces need for external ESD protection in handheld and wearable designs |
| Pb−Free & RoHS Compliant | Meets global environmental compliance requirements without sacrificing solderability or reliability |
| Stable Zener Voltage Tempco | Temperature coefficient of +18.4 mV/°C - enables predictable drift compensation in temperature-sensitive references |
Applications
| Cellular Phone Power Management | Automotive Infotainment Supply Clamp |
|---|---|
Use Scenario: Clamping transient spikes on 24 V supply rails feeding display backlight drivers. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing overvoltage protection. Use Value: Prevents damage to downstream PMICs with 25.6 V absolute maximum rating using only 1.7 mm × 1.25 mm board area. |
Use Scenario: Stabilizing reference voltage for analog audio codec biasing in head unit systems. IC Role / Device Role / Timing Role: Precision DC voltage reference source for ADC/DAC reference inputs. Use Value: Delivers 24.2 V ±0.8 V with <70 Ω dynamic impedance, reducing code-width error in 12-bit audio converters. |
| High-Density PC Board Voltage Reference | Handheld Medical Device Sensor Bias |
Use Scenario: Providing stable bias for op-amp comparators in compact IoT gateway modules. IC Role / Device Role / Timing Role: Low-power Zener reference replacing larger TO-92 or SOT-23 alternatives. Use Value: Achieves same regulation accuracy in 30% less board area than SOT-23 packages, supporting 8-layer HDI routing. |
Use Scenario: Supplying calibrated excitation voltage to resistive temperature sensors in portable diagnostics tools. IC Role / Device Role / Timing Role: Low-drift voltage source for ratiometric sensor measurements. Use Value: Enables ±0.5°C temperature accuracy over −25°C to +70°C operating range via known tempco (+18.4 mV/°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B24,115 (Nexperia) | Same 24 V nominal Zener, but 200 mW rating and 100 Ω ZZT; SOD-323 package, AEC-Q101 qualified | Limited to lower-power clamping due to reduced PD; higher impedance affects transient response | Select when cost sensitivity outweighs need for 300 mW headroom or sub-70 Ω impedance |
| MMSZ5242BT1G (onsemi) | 24 V Zener in SOD-123; 500 mW rating but larger 3.5 mm × 1.6 mm footprint; not AEC-Q101 qualified | Supports higher surge energy but incompatible with ultra-dense layouts requiring SOD-323 | Choose for non-automotive industrial applications needing greater power margin and relaxed board area constraints |
Compared with BZX384-B24,115 and MMSZ5242BT1G, SZMM3Z24VT1G uniquely balances AEC-Q101 compliance, 300 mW capability, and minimal 1.7 mm × 1.25 mm footprint-making it optimal for automotive and portable designs where space, reliability, and power density are jointly constrained.
Availability
SZMM3Z24VT1G is available at Aetrix Electronics and suitable for cellular phone power management, automotive infotainment supply clamp, and high-density PC board voltage reference applications requiring stable component supply across production lifecycles.
Supply support for SZMM3Z24VT1G 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and edge applications.
SZMM3Z24VT1G belongs to the MM3ZxxxT1G/SZMM3ZxxxT1G series-a family of 300 mW SOD−323 Zener regulators engineered for space-constrained, high-reliability voltage reference and clamping in automotive and portable electronics.
FAQ
What is the Zener voltage tolerance of SZMM3Z24VT1G?
The SZMM3Z24VT1G has a Zener voltage range of 22.8 V (minimum) to 25.6 V (maximum) at IZT = 5 mA and TA = 25°C, yielding a nominal value of 24.2 V with ±0.8 V absolute tolerance. This specification is verified per the onsemi MM3ZxxxT1G Series datasheet Rev. 11, and applies directly to the SZMM3Z24VT1G variant.
Is SZMM3Z24VT1G qualified for automotive applications?
Yes, SZMM3Z24VT1G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the official datasheet. The "SZ" prefix denotes compliance with automotive-specific site and process controls, making SZMM3Z24VT1G suitable for under-hood and infotainment systems meeting automotive reliability standards.
What is the thermal resistance junction-to-ambient (RJA) for SZMM3Z24VT1G?
The thermal resistance junction-to-ambient (RJA) of SZMM3Z24VT1G is 416 °C/W, measured on an FR−4 printed circuit board with single-sided copper and a 1 cm² mounting pad. This value is critical for calculating junction temperature rise under load and appears in the "Maximum Ratings" table of the onsemi datasheet.
Does SZMM3Z24VT1G have a defined forward voltage specification?
Yes, SZMM3Z24VT1G specifies a maximum forward voltage (VF) of 0.9 V at IF = 10 mA, consistent across the entire MM3ZxxxT1G/SZMM3ZxxxT1G series. This parameter is confirmed in the "ELECTRICAL CHARACTERISTICS" table footnote and supports design of bidirectional protection or dual-purpose bias networks.
What is the package outline and marking for SZMM3Z24VT1G?
SZMM3Z24VT1G uses the SOD−323 (Case 477) package with dimensions 1.7 mm × 1.25 mm × 0.9 mm. Its marking code is "11", located adjacent to the cathode band, as shown in the "DEVICE MARKING INFORMATION" section and confirmed in the Electrical Characteristics table on page 2 of the datasheet.
SZMM3Z24VT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24.2 V
- Tolerance:
- -
- Power - Max:
- 300 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-323
SZMM3Z24VT1G FAQ
1.How can I place an order for SZMM3Z24VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z24VT1G 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 SZMM3Z24VT1G reliable?
The price and inventory of SZMM3Z24VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z24VT1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z24VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z24VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z24VT1G?
SZMM3Z24VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z24VT1G 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 SZMM3Z24VT1G?
For technical support, including SZMM3Z24VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z24VT1G requirements.
6.How does Aetrix verify that SZMM3Z24VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z24VT1G 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 SZMM3Z24VT1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z24VT1G?
All SZMM3Z24VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z24VT1G, 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 SZMM3Z24VT1G part is unused and in its original packaging.
Return procedure for SZMM3Z24VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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