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onsemi SZBZX84C3V3LT1
- Part No.:
- SZBZX84C3V3LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C3V3LT1.pdf
- Description:
- DIODE ZENER 3.3V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:72,000
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Product details
Overview
SZBZX84C3V3LT1 from onsemi is a 3.3 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 95 Ω dynamic impedance at 5 mA test current and 5 µA maximum reverse leakage at 1 V reverse voltage. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZBZX84C3V3LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W), ESD rating (>16 kV HBM), cathode-anode polarity marking, and Pb-free SOT-23 compatibility with automated assembly.
Technical Context
This device operates as a two-terminal voltage regulator using controlled reverse-biased avalanche breakdown. Its nominal Zener voltage of 3.3 V is specified at 5 mA test current (IZT), with temperature coefficient of −3.5 mV/°C and capacitance of 450 pF at 0 V bias and 1 MHz.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode), corrosion-resistant finish, UL 94 V-0 flammability rating, and maximum soldering temperature of 260°C for 10 seconds. It is AEC-Q101 qualified and PPAP capable for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 3.3 V nominal, 3.1–3.5 V range at 5 mA - defines stable regulation point for low-voltage biasing |
| Power Rating | 225 mW on FR-5 board at 25°C - sets maximum continuous dissipation without heatsinking |
| Zener Impedance | 95 Ω max at 5 mA - determines output voltage stability under load variation |
| Reverse Leakage | 5 µA max at 1 V - ensures minimal quiescent current in standby clamping circuits |
| Temperature Coefficient | −3.5 mV/°C - quantifies voltage drift with ambient temperature change |
| Capacitance | 450 pF at 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling in manual and automated assembly |
Pinout & Package
SOT-23 (Case 318, Style 8) surface-mount plastic package with void-free thermosetting resin, cathode indicated by polarity band, and UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-bias configuration; required for proper Zener conduction |
| Pin 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad should attach |
| Pin 3 | Cathode | Connected to higher-potential node; polarity band on package identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating on FR-5 | Enables compact voltage regulation without external heat sinking in space-constrained layouts |
| ESD Rating >16 kV (HBM) | Eliminates need for additional ESD protection in handheld and portable end equipment |
| AEC-Q101 Qualified | Validates reliability for automotive cabin electronics, infotainment, and body control modules |
| 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 allows predictable thermal rise in high-density PCBs |
Applications
| USB Port Overvoltage Protection | Low-Voltage Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events in portable accessories. IC Role / Device Role / Timing Role: Two-terminal shunt regulator acting as voltage clamp to limit VBUS to ≤3.5 V during fault conditions. Use Value: Prevents damage to 3.3 V USB PHY ICs by diverting surge current above 3.3 V while maintaining <5 µA leakage during normal operation. | Use Scenario: Generating a clean, temperature-stable reset threshold for 3.3 V microcontrollers in battery-powered sensors. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in RC-based reset generator circuit. Use Value: Delivers ±5% regulation accuracy and −3.5 mV/°C drift compensation to ensure reliable reset assertion across −40°C to +85°C. |
| Cellular Phone Battery Monitoring | Industrial Sensor Signal Conditioning |
Use Scenario: Providing reference voltage for ADC measurement of Li-ion battery cell voltage in smartphone fuel gauges. IC Role / Device Role / Timing Role: Low-drift Zener reference source for analog front-end biasing in battery management ICs. Use Value: Maintains 450 pF capacitance and 95 Ω impedance to minimize ADC acquisition error and noise coupling in 12-bit systems. | Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in factory automation transmitters. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed 3.3 V bias for Wheatstone bridge excitation. Use Value: Ensures <1% full-scale error contribution from reference drift over operating temperature range due to −3.5 mV/°C TC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C3V3LT1 | Same electrical specs but non-automotive grade; lacks AEC-Q101 qualification and SZ prefix | Not suitable for automotive ECUs or safety-critical modules requiring PPAP documentation | Select when cost-sensitive consumer designs require identical performance without automotive validation |
| SZBZX84C3V3LT3G | Identical Zener parameters, same AEC-Q101 qualification, but supplied in 10,000-piece tape-and-reel vs. 3,000-piece | Preferred for high-volume production runs where reel size affects pick-and-place efficiency | Choose for large-batch manufacturing to reduce changeover frequency and feeder setup time |
Compared with SZBZX84C3V3LT1, BZX84C3V3LT1 offers identical regulation performance but omits automotive qualification, while SZBZX84C3V3LT3G provides identical specs and compliance in larger packaging - enabling optimized logistics for volume production without design or layout changes.
Availability
SZBZX84C3V3LT1 is available at Aetrix Electronics and suitable for USB protection circuits, microcontroller reset generation, battery monitoring systems, and industrial sensor biasing requiring stable component supply and automotive-grade reliability.
Supply support for SZBZX84C3V3LT1 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, high-performance silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
SZBZX84C3V3LT1 belongs to the SZBZX84CxxxLT1G Zener regulator family, engineered for space-constrained, high-reliability applications including automotive infotainment, portable electronics, and industrial sensing where precise low-voltage regulation and AEC-Q101 compliance are mandatory.
FAQ
What is the exact Zener voltage tolerance for SZBZX84C3V3LT1?
The SZBZX84C3V3LT1 has a nominal Zener voltage of 3.3 V with a tolerance of ±5%, meaning the actual measured voltage falls between 3.1 V and 3.5 V when tested at 5 mA (IZT) and 25°C ambient temperature. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet revision 14.
Is SZBZX84C3V3LT1 suitable for automotive applications?
Yes, SZBZX84C3V3LT1 is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix explicitly indicating compliance for automotive and other applications requiring unique site and process controls. Its qualification covers temperature cycling, humidity testing, and mechanical stress validation per automotive reliability standards.
What is the thermal resistance of SZBZX84C3V3LT1 on FR-5 board?
The thermal resistance (RJA) of SZBZX84C3V3LT1 is 556 °C/W when mounted on an FR-5 board at 25°C ambient. This value is derived from its 225 mW power rating and 1.8 mW/°C derating factor above 25°C, defining the junction-to-ambient temperature rise under steady-state operation.
Does SZBZX84C3V3LT1 have a built-in ESD protection rating?
Yes, SZBZX84C3V3LT1 carries an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as stated in the Features section of the datasheet. This rating applies to both anode and cathode terminals and eliminates the need for external ESD suppressors in most portable electronics designs.
What is the pin configuration and polarity marking for SZBZX84C3V3LT1?
SZBZX84C3V3LT1 uses the SOT-23 package with Pin 1 as Anode, Pin 2 as No Connection (unbonded), and Pin 3 as Cathode. The cathode is marked by a visible polarity band on the package body - consistent across all BZX84CxxxLT1 and SZBZX84CxxxLT1G series devices per the Marking Diagram on page 2.
SZBZX84C3V3LT1 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):
- 3.3 V
- Tolerance:
- ±6%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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)
SZBZX84C3V3LT1 FAQ
1.How can I place an order for SZBZX84C3V3LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C3V3LT1 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 SZBZX84C3V3LT1 reliable?
The price and inventory of SZBZX84C3V3LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C3V3LT1 is usually 5 days.
3.What payment methods are accepted for SZBZX84C3V3LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C3V3LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C3V3LT1?
SZBZX84C3V3LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C3V3LT1 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 SZBZX84C3V3LT1?
For technical support, including SZBZX84C3V3LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C3V3LT1 requirements.
6.How does Aetrix verify that SZBZX84C3V3LT1 is sourced from the original manufacturer or authorized distributors?
All SZBZX84C3V3LT1 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 SZBZX84C3V3LT1 meets industry standards.
7.What is the process for return or replacement of SZBZX84C3V3LT1?
All SZBZX84C3V3LT1 units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C3V3LT1, 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 SZBZX84C3V3LT1 part is unused and in its original packaging.
Return procedure for SZBZX84C3V3LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C3V3LT1 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
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onsemi
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Micro Commercial Co
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Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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