My Inquiry
My Account
onsemi SZBZX84C4V7LT3G
- Part No.:
- SZBZX84C4V7LT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C4V7LT3G.pdf
- Description:
- DIODE ZENER 4.7V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:72,708
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZBZX84C4V7LT3G from onsemi is a 4.7 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board at 25°C, with 80 Ω dynamic impedance at 5 mA test current and 0.2 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the SZBZX84C4V7LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener tolerance (±5%), low leakage (3 µA @ 3.2 V), ESD robustness (>16 kV HBM), automotive qualification (AEC-Q101), and Pb-free SOT-23 packaging compatible with high-density automated assembly.
Technical Context
This device operates as a two-terminal voltage regulator using avalanche breakdown in silicon PN junction. Its nominal 4.7 V Zener voltage is specified at 5 mA test current with tight 4.4–5.0 V min/max range, and exhibits low dynamic impedance (80 Ω) ensuring stable regulation under varying load conditions.
The SZBZX84C4V7LT3G features Class 3 ESD rating (>16 kV HBM), AEC-Q101 qualification for automotive use, and thermal resistance of 500 °C/W on FR-5 board - enabling reliable operation in compact, thermally constrained environments such as battery management and USB-powered peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal, 4.4–5.0 V min/max at 5 mA - defines precise clamping threshold for 5 V rail protection |
| Power Dissipation | 250 mW on FR-5 board at 25°C - supports continuous regulation in space-constrained PCBs |
| Zener Impedance (ZZT) | 80 Ω max at 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current | 3 µA max at 3.2 V - maintains low quiescent current in standby power domains |
| Temperature Coefficient | ±0.2 mV/°C - enables stable reference performance across −65°C to +150°C operating range |
| ESD Rating | Class 3 (>16 kV HBM) - protects against electrostatic discharge during handling and system integration |
| Package | SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm - enables high-density placement on portable PCBs |
Pinout & Package
SOT-23 plastic surface-mount package with void-free thermosetting case, corrosion-resistant finish, and cathode indicated by polarity band. Maximum soldering temperature is 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential side of regulated node; reverse-biased during Zener operation |
| 2 | No Connection | Internally unconnected terminal - must remain floating per datasheet specification |
| 3 | Cathode | Connected to higher-potential side; polarity band identifies this terminal for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including infotainment power supplies and body control modules |
| Pb-Free & RoHS Compliant | Meets global environmental regulations without compromising thermal or electrical performance |
| Low Capacitance | 260 pF at 0 V bias and 1 MHz - minimizes signal distortion in high-frequency filtering applications |
| Tight Thermal Stability | 0.2 mV/°C tempco enables <±10 mV drift over 0–70°C ambient - suitable for precision references |
| High-Density Packaging | SOT-23 footprint allows >2× placement density vs. DO-35, critical for handheld and wearable designs |
Applications
| USB Power Rail Protection | Automotive Sensor Reference |
|---|---|
Use Scenario: Clamping transient spikes on 5 V USB VBUS lines in portable accessories. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing surge energy above 4.7 V threshold. Use Value: Prevents damage to downstream USB controllers with 3 µA leakage preserving battery life in sleep mode. |
Use Scenario: Providing stable 4.7 V reference for analog sensor signal conditioning in engine control units. IC Role / Device Role / Timing Role: Precision voltage reference source with AEC-Q101 qualification for under-hood reliability. Use Value: Maintains <±10 mV accuracy across −40°C to +125°C, enabling consistent ADC calibration. |
| Portable Device Battery Monitor | Industrial I/O Module Clamp |
Use Scenario: Monitoring Li-ion cell voltage via resistive divider with Zener-clamped input to MCU ADC. IC Role / Device Role / Timing Role: Overvoltage clamp protecting 3.3 V ADC input from battery pack fluctuations. Use Value: 80 Ω Zener impedance ensures <10 mV error at 100 µA divider current, improving measurement fidelity. |
Use Scenario: Protecting 24 V industrial digital inputs against ESD and line transients. IC Role / Device Role / Timing Role: Fast-response shunt element diverting >16 kV HBM events away from logic circuitry. Use Value: Class 3 ESD rating eliminates need for external TVS in cost-sensitive PLC I/O designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C4V7LT3G | Standard-grade (non-automotive); same 4.7 V, ±5%, 80 Ω ZZT, but no AEC-Q101 qualification | Targeted at consumer electronics where automotive reliability is not required | Select when cost sensitivity outweighs automotive qualification needs |
| SZBZX84C4V7LT1G | Same electrical specs and AEC-Q101 qualification, but supplied in 3,000-piece tape-and-reel vs. 10,000-piece for LT3G | Preferred for prototyping or low-volume production runs | Choose for evaluation or small-batch builds requiring same automotive compliance |
Compared with BZX84C4V7LT3G and SZBZX84C4V7LT1G, the SZBZX84C4V7LT3G provides identical regulation performance and automotive qualification while optimizing for high-volume manufacturing through its 10,000-unit reel configuration - reducing assembly changeover frequency and lowering total cost of ownership.
Availability
SZBZX84C4V7LT3G is available at Aetrix Electronics and suitable for USB power protection, automotive sensor reference, and industrial I/O clamping requiring stable component supply with guaranteed long-term sourcing.
Supply support for SZBZX84C4V7LT3G 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.
The BZX84/SZBZX84 series was designed specifically for compact, high-reliability voltage regulation in space-constrained and thermally demanding environments - emphasizing automotive-grade robustness and automated assembly compatibility.
FAQ
What is the Zener voltage tolerance of SZBZX84C4V7LT3G?
The SZBZX84C4V7LT3G has a nominal Zener voltage of 4.7 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 4.4 V and 5.0 V when measured at 5 mA test current and 25°C ambient temperature. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet for the SZBZX84CxxxLT3G series. The SZBZX84C4V7LT3G maintains this specification across its qualified operating temperature range.
Is SZBZX84C4V7LT3G qualified for automotive applications?
Yes, SZBZX84C4V7LT3G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. It meets automotive reliability requirements including temperature cycling, humidity testing, and mechanical shock - making it suitable for use in engine control units, body electronics, and infotainment systems. The "SZ" prefix denotes automotive and other applications requiring unique site and control change requirements.
What is the maximum power dissipation of SZBZX84C4V7LT3G on FR-5 board?
The SZBZX84C4V7LT3G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient temperature, with derating of 2.0 mW/°C above that temperature. This value is specified in the Maximum Ratings table on page 2 of the onsemi datasheet. The thermal resistance from junction-to-ambient is 500 °C/W under these conditions, directly impacting safe operating area in thermally isolated PCB layouts.
Does SZBZX84C4V7LT3G have ESD protection?
Yes, SZBZX84C4V7LT3G carries a Class 3 Human Body Model (HBM) ESD rating exceeding 16 kV, as documented in the Features section of the onsemi datasheet. This level of ESD robustness allows safe handling during manual assembly and protects against electrostatic discharge events in end-user environments - eliminating the need for additional upstream ESD suppression in many portable and industrial applications.
What is the pin configuration of SZBZX84C4V7LT3G?
The SZBZX84C4V7LT3G uses the SOT-23 package with pinout: Pin 1 = Anode, Pin 2 = No Connection (internally unconnected), Pin 3 = Cathode - as confirmed in the Electrical Characteristics tables on pages 3 and 4 of the onsemi datasheet and the Mechanical Case Outline on page 7 (Style 8). The cathode is marked by a polarity band on the package body.
SZBZX84C4V7LT3G 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):
- 4.7 V
- Tolerance:
- ±6%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 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)
SZBZX84C4V7LT3G FAQ
1.How can I place an order for SZBZX84C4V7LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C4V7LT3G 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 SZBZX84C4V7LT3G reliable?
The price and inventory of SZBZX84C4V7LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C4V7LT3G is usually 5 days.
3.What payment methods are accepted for SZBZX84C4V7LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C4V7LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C4V7LT3G?
SZBZX84C4V7LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C4V7LT3G 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 SZBZX84C4V7LT3G?
For technical support, including SZBZX84C4V7LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C4V7LT3G requirements.
6.How does Aetrix verify that SZBZX84C4V7LT3G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C4V7LT3G 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 SZBZX84C4V7LT3G meets industry standards.
7.What is the process for return or replacement of SZBZX84C4V7LT3G?
All SZBZX84C4V7LT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C4V7LT3G, 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 SZBZX84C4V7LT3G part is unused and in its original packaging.
Return procedure for SZBZX84C4V7LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C4V7LT3G Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
