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onsemi SZBZX84C24LT1
- Part No.:
- SZBZX84C24LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C24LT1.pdf
- Description:
- DIODE ZENER 24V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:48,000
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Product details
Overview
SZBZX84C24LT1 from onsemi is a 24 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 70 Ω dynamic impedance at 5 mA test current and 0.05 µA reverse leakage at 19.2 V. It serves as a precision voltage reference or overvoltage clamp in portable power rails and low-power sensor biasing circuits.
For engineers reviewing the SZBZX84C24LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W), ESD rating (>16 kV HBM), junction temperature range (−65 to +150°C), and Pb-free SOT-23 packaging compatibility with automated assembly.
Technical Context
This device operates as a two-terminal voltage regulator using avalanche breakdown in silicon PN junction. Its nominal Zener voltage of 24 V is specified at 5 mA test current (IZT), with temperature coefficient of +16.8 mV/°C ensuring predictable drift across −55°C to +150°C operating range.
The SOT-23 package features cathode-indicated polarity band, void-free thermosetting plastic case, UL 94 V-0 flammability rating, and 260°C soldering tolerance for 10 seconds - enabling reliable reflow integration into high-density PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 24 V nominal, 22.8–25.6 V min/max at 5 mA - defines stable regulation point for 24 V rail clamping or reference generation |
| Power Dissipation | 225 mW on FR-5 board at 25°C - sets maximum continuous DC power handling before thermal derating begins |
| Zener Impedance | 70 Ω max at 5 mA - determines output voltage stability under varying load current |
| Reverse Leakage | 0.05 µA max at 19.2 V - ensures minimal standby current in high-impedance bias networks |
| Temperature Coefficient | +16.8 mV/°C - quantifies voltage drift per degree Celsius, critical for temperature-sensitive references |
| Capacitance | 80 pF max at 0 V, 1 MHz - impacts high-frequency noise filtering and transient response in bypass applications |
| ESD Rating | Class 3 (>16 kV) per HBM - supports robust handling in portable electronics manufacturing and field operation |
Pinout & Package
SOT-23 surface-mount plastic package (Case 318, Style 8), 2.90 mm × 1.30 mm × 1.00 mm body dimensions, cathode indicated by band, pin 2 internally unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential side of Zener junction; reverse-biased during regulation |
| 2 | No Connection | Internally isolated; no electrical function - must remain unconnected on PCB |
| 3 | Cathode | Connected to higher-potential side; marked by polarity band; carries regulated output current |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW FR-5 power rating | Enables compact voltage regulation without heatsinking in space-constrained hand-held designs |
| ESD rating >16 kV HBM | Eliminates need for external ESD protection in consumer-grade portable interfaces |
| AEC-Q101 qualified | Validates reliability for automotive infotainment and body electronics applications |
| Pb-free SOT-23 package | Meets RoHS compliance requirements and supports lead-free reflow soldering profiles |
| Tight thermal resistance control | 556 °C/W junction-to-ambient enables accurate thermal modeling in multi-layer board layouts |
Applications
| Portable Power Rail Clamping | Sensor Bias Reference |
|---|---|
Use Scenario: Protecting 24 V supply lines in handheld medical monitors against transient overvoltage events. IC Role / Device Role / Timing Role: Two-terminal shunt regulator clamping excess voltage to prevent downstream IC damage. Use Value: 24 V nominal Zener voltage matches system rail; 0.05 µA leakage minimizes quiescent current draw in battery-powered operation. | Use Scenario: Providing stable bias voltage for analog front-end amplifiers in industrial temperature sensors. IC Role / Device Role / Timing Role: Precision voltage reference source with predictable temperature drift (+16.8 mV/°C). Use Value: ±5% tolerance and 70 Ω impedance ensure <±0.5% output variation across 1–10 mA load range. |
| Automotive Body Control Module | IoT Node Voltage Supervision |
Use Scenario: Monitoring 24 V battery voltage in vehicle door module microcontrollers. IC Role / Device Role / Timing Role: Overvoltage detection element feeding comparator input in power management circuit. Use Value: AEC-Q101 qualification guarantees operation across −40°C to +125°C ambient, matching automotive under-hood requirements. | Use Scenario: Enabling brown-out detection in LPWAN sensor nodes powered by 24 V solar-charged batteries. IC Role / Device Role / Timing Role: Threshold-setting component in discrete reset generator circuit. Use Value: 80 pF capacitance avoids signal distortion at sub-1 MHz wake-up timing frequencies while maintaining low leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C24LT1 | Same electrical specs and SOT-23 package but lacks AEC-Q101 qualification and SZ prefix; Pb-free option requires G suffix | Not validated for automotive use; suitable only for commercial-grade portable electronics | Select when AEC-Q101 compliance is unnecessary and cost sensitivity outweighs automotive qualification needs |
| SZBZX84C24LT1G | Identical electrical and mechanical specifications; differs only in Pb-free marking (G suffix) and RoHS documentation traceability | No functional difference; used where regulatory compliance documentation for lead-free content is mandatory | Select when full RoHS declaration and material composition reporting are required for end-product certification |
Compared with BZX84C24LT1, SZBZX84C24LT1 adds AEC-Q101 validation for automotive environments; compared with SZBZX84C24LT1G, it shares identical performance but omits formal Pb-free labeling - making it appropriate for legacy industrial designs where RoHS documentation is not audited.
Availability
SZBZX84C24LT1 is available at Aetrix Electronics and suitable for portable medical devices, automotive body electronics, industrial sensor modules, and IoT edge nodes requiring stable component supply with automotive-grade reliability and Pb-free compliance.
Supply support for SZBZX84C24LT1 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 (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
SZBZX84C24LT1 belongs to the BZX84CxxxLT1 family of Zener regulators designed specifically for space-constrained, high-reliability voltage reference and clamping in portable and automotive electronics.
FAQ
What is the Zener voltage tolerance of SZBZX84C24LT1?
The SZBZX84C24LT1 has a nominal Zener voltage of 24 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 22.8 V and 25.6 V when tested at 5 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official datasheet and applies strictly to the SZBZX84C24LT1 variant within the BZX84CxxxLT1 series.
Does SZBZX84C24LT1 have an internal connection on pin 2?
No, pin 2 of the SZBZX84C24LT1 is a no-connect terminal - it is not electrically bonded to any internal structure and must remain unconnected on the PCB layout. The device functions as a two-terminal Zener diode with pin 1 as anode and pin 3 as cathode, as explicitly stated in the Pinout section of the datasheet.
Is SZBZX84C24LT1 qualified for automotive applications?
Yes, SZBZX84C24LT1 is AEC-Q101 qualified and PPAP capable, as documented in the Features section of the datasheet. The "SZ" prefix denotes automotive and other applications requiring unique site and process controls, distinguishing it from commercial-grade BZX84C24LT1 variants that lack this qualification.
What is the maximum reverse leakage current for SZBZX84C24LT1?
The maximum reverse leakage current for SZBZX84C24LT1 is 0.05 µA at VR = 19.2 V, as specified in the Electrical Characteristics table on page 3. This value is measured under standard conditions (TA = 25°C) and reflects the device's ability to maintain low standby current in high-impedance bias networks.
Can SZBZX84C24LT1 be used in lead-free reflow processes?
Yes, SZBZX84C24LT1 supports lead-free reflow soldering with a maximum case temperature of 260°C for 10 seconds, as stated in the Mechanical Characteristics section. Its thermosetting plastic package and corrosion-resistant finish are engineered for compatibility with standard Pb-free reflow profiles used in modern electronics assembly.
SZBZX84C24LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±6%
- Power - Max:
- 225 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:
- SOT-23-3 (TO-236)
SZBZX84C24LT1 FAQ
1.How can I place an order for SZBZX84C24LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C24LT1 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 SZBZX84C24LT1 reliable?
The price and inventory of SZBZX84C24LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C24LT1 is usually 5 days.
3.What payment methods are accepted for SZBZX84C24LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C24LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C24LT1?
SZBZX84C24LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C24LT1 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 SZBZX84C24LT1?
For technical support, including SZBZX84C24LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C24LT1 requirements.
6.How does Aetrix verify that SZBZX84C24LT1 is sourced from the original manufacturer or authorized distributors?
All SZBZX84C24LT1 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 SZBZX84C24LT1 meets industry standards.
7.What is the process for return or replacement of SZBZX84C24LT1?
All SZBZX84C24LT1 units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C24LT1, 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 SZBZX84C24LT1 part is unused and in its original packaging.
Return procedure for SZBZX84C24LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C24LT1 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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