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onsemi SZBZX84C5V1LT3G
- Part No.:
- SZBZX84C5V1LT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C5V1LT3G.pdf
- Description:
- DIODE ZENER 5.1V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:62,246
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Product details
Overview
SZBZX84C5V1LT3G from onsemi is a 5.1 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 60 Ω dynamic impedance at 5 mA test current and −2.7 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the SZBZX84C5V1LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener tolerance (±5%), thermal coefficient, leakage current (2 µA @ 3 V), junction capacitance (225 pF), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for stable reverse-bias regulation under DC or low-frequency transient conditions. Its 250 mW rating applies to FR-5 PCB mounting, derating linearly above 25°C at 2.0 mW/°C.
The SOT-23 package (Case 318, Style 8) defines a fixed 3-pin layout: Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode. It supports automated placement and achieves Class 3 ESD robustness (>16 kV HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 5.1 V nominal, 4.8–5.4 V range at 5 mA - ensures stable regulation across production lot and temperature. |
| Power Dissipation | 250 mW on FR-5 board - sets maximum continuous DC power before thermal shutdown or degradation. |
| Zener Impedance | 60 Ω at 5 mA - determines output voltage variation under load current changes (e.g., ±30 mV for ±1.8 mA ripple). |
| Temperature Coefficient | −2.7 mV/°C - enables predictable drift compensation in temperature-sensitive references. |
| Reverse Leakage | 2 µA max at 3 V - critical for low-power standby circuits where quiescent current must remain sub-µA. |
| Junction Capacitance | 225 pF at 0 V, 1 MHz - impacts high-frequency noise filtering and AC coupling performance. |
| ESD Rating | Class 3 (>16 kV HBM) - qualifies for direct integration into handheld and automotive front-end interfaces without external protection. |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; cathode indicated by band; UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | DC current entry point during forward bias; connected to lower-potential node in Zener regulation configuration. |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required. |
| 3 | Cathode | Regulated output node in reverse bias; polarity band on package aligns with this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and body electronics requiring PPAP documentation. |
| Pb-Free & RoHS Compliant | Meets global environmental regulations; compatible with lead-free reflow profiles up to 260°C for 10 seconds. |
| Tight Thermal Stability | −2.7 mV/°C TC enables <±15 mV total drift from −40°C to +125°C - suitable for industrial sensor references. |
| Low-Leakage Regulation | 2 µA max IR at 3 V allows use in battery-backed real-time clocks and ultra-low-power microcontroller reset circuits. |
| High-Density Mounting | SOT-23 footprint (2.9 × 1.3 mm) supports >10,000 units per 10×10 cm² PCB area in space-constrained IoT nodes. |
Applications
| Automotive Body Control Module | Portable Medical Sensor Supply |
|---|---|
Use Scenario: Stable 5.1 V reference for LIN bus transceiver bias and microcontroller ADC reference in door module ECUs. IC Role / Device Role / Timing Role: Two-terminal Zener regulator providing precise, low-drift voltage rail independent of input fluctuations. Use Value: Eliminates need for external LDO in cost-sensitive modules while maintaining AEC-Q101 compliance and <±1% output accuracy over temperature. |
Use Scenario: Low-quiescent voltage clamp for disposable glucose meter analog front-end powered by coin cell. IC Role / Device Role / Timing Role: Reverse-biased Zener limiting supply rail to protect op-amps and ADC inputs during battery overvoltage events. Use Value: 2 µA leakage ensures >5-year shelf life; 225 pF capacitance avoids signal distortion in 10 kHz biosignal acquisition paths. |
| Industrial PLC I/O Protection | Consumer Wireless Charging Receiver |
Use Scenario: Overvoltage clamp on 24 V digital input channel exposed to field wiring transients. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing surge energy before reaching downstream logic interface ICs. Use Value: 250 mW rating handles repetitive 100 ns pulses; Class 3 ESD withstand prevents latch-up during factory handling and field maintenance. |
Use Scenario: Secondary-side voltage stabilization in Qi-compliant receiver IC power path feeding USB-C PD negotiation circuitry. IC Role / Device Role / Timing Role: Precision 5.1 V reference for voltage monitor comparator triggering fast disconnect during foreign object detection (FOD) faults. Use Value: ±5% tolerance and −2.7 mV/°C TC ensure consistent FOD threshold across −10°C to +60°C ambient - reducing false positives by >40% vs. generic Zeners. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C5V1LT3G | Standard tolerance (±5%), non-automotive grade, same SOT-23 package and electrical specs. | Lacks AEC-Q101 qualification and PPAP support; suitable for commercial-grade consumer products only. | Select when automotive qualification is unnecessary and cost sensitivity outweighs long-term reliability requirements. |
| SZBZX84C5V1LT1G | Identical Zener parameters and AEC-Q101 qualification, but supplied in 3,000-unit tape-and-reel vs. 10,000-unit for LT3G. | Same functional performance; preferred for low-volume prototyping or mixed-BOM builds with smaller lot sizes. | Choose for design validation, small-batch production, or inventory alignment with existing LT1G-based platforms. |
Compared with BZX84C5V1LT3G and SZBZX84C5V1LT1G, the SZBZX84C5V1LT3G offers identical regulation performance and automotive qualification while optimizing for high-volume manufacturing via larger reel size - reducing line changeovers and handling costs in mass production.
Availability
SZBZX84C5V1LT3G is available at Aetrix Electronics and suitable for automotive body electronics, portable medical sensors, industrial I/O protection, and wireless charging receivers requiring stable component supply with full traceability and lifecycle management.
Supply support for SZBZX84C5V1LT3G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
The SZBZX84CxxxLTxG series targets cost-sensitive, space-constrained systems needing reliable voltage regulation - especially automotive subsystems where AEC-Q101 compliance and thermal stability are mandatory.
FAQ
What is the Zener voltage tolerance of SZBZX84C5V1LT3G?
The SZBZX84C5V1LT3G has a nominal Zener voltage of 5.1 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 4.8 V and 5.4 V when tested at 5 mA. This tolerance is specified per the BZX84C series standard grade and is verified across production lots and temperature ranges from −65°C to +150°C. The SZBZX84C5V1LT3G maintains this specification under both FR-5 board and alumina substrate mounting conditions.
Is SZBZX84C5V1LT3G qualified for automotive applications?
Yes, SZBZX84C5V1LT3G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including body control modules, lighting drivers, and infotainment power management. The "SZ" prefix explicitly denotes automotive-grade screening, process controls, and site-specific change management. This qualification covers thermal cycling, humidity testing, and mechanical shock per AEC-Q101 Rev D, and is documented in onsemi's official certification reports.
What is the maximum power dissipation of SZBZX84C5V1LT3G on a standard PCB?
SZBZX84C5V1LT3G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient, with linear derating of 2.0 mW/°C above that temperature. At 85°C ambient, its usable power drops to 130 mW. This rating assumes standard 1 oz copper, 0.062" thickness, and no thermal vias - actual dissipation may improve with enhanced PCB layout, but must not exceed the absolute maximum junction temperature of +150°C.
Does SZBZX84C5V1LT3G have a no-connect pin, and how should it be handled on the PCB?
Yes, SZBZX84C5V1LT3G uses Pin 2 as a no-connect terminal per SOT-23 Style 8 pinout. This pin is internally unconnected and must remain electrically floating - no trace, pad, or solder mask opening is required. PCB layout should omit any copper connection to Pin 2 to avoid unintended parasitic coupling or assembly defects. The device functions correctly with only Pins 1 (Anode) and 3 (Cathode) populated.
What is the reverse leakage current specification for SZBZX84C5V1LT3G at 3 V?
The reverse leakage current (IR) for SZBZX84C5V1LT3G is guaranteed ≤2 µA at VR = 3 V and TA = 25°C. This value is measured under standardized test conditions and reflects worst-case leakage across the qualified lot. In low-power applications such as battery-backed RTCs or sleep-mode microcontrollers, this leakage contributes less than 0.1% of typical system standby current, ensuring multi-year operational life without significant battery drain.
SZBZX84C5V1LT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZBZX84CxxxLT1G
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±6%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 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)
SZBZX84C5V1LT3G FAQ
1.How can I place an order for SZBZX84C5V1LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C5V1LT3G 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 SZBZX84C5V1LT3G reliable?
The price and inventory of SZBZX84C5V1LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C5V1LT3G is usually 5 days.
3.What payment methods are accepted for SZBZX84C5V1LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C5V1LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C5V1LT3G?
SZBZX84C5V1LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C5V1LT3G 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 SZBZX84C5V1LT3G?
For technical support, including SZBZX84C5V1LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C5V1LT3G requirements.
6.How does Aetrix verify that SZBZX84C5V1LT3G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C5V1LT3G 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 SZBZX84C5V1LT3G meets industry standards.
7.What is the process for return or replacement of SZBZX84C5V1LT3G?
All SZBZX84C5V1LT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C5V1LT3G, 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 SZBZX84C5V1LT3G part is unused and in its original packaging.
Return procedure for SZBZX84C5V1LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C5V1LT3G Tags
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