My Inquiry
My Account
onsemi BZX84C4V3LT3G
- Part No.:
- BZX84C4V3LT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C4V3LT3G.pdf
- Description:
- DIODE ZENER 4.3V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:58,833
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84C4V3LT3G from onsemi is a 4.3 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C, with 90 Ω dynamic impedance at 5 mA test current and 30 μA maximum reverse leakage at 1 V. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rails and USB interface protection circuits.
For engineers reviewing the BZX84C4V3LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (500 °C/W on FR-5), ESD robustness (>16 kV HBM), and compatibility with high-density automated assembly processes.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for reverse-bias breakdown regulation. Its Zener voltage is specified at three test currents (1 mA, 5 mA, 20 mA), enabling stable clamping across varying load conditions.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode) and supports surface-mount reflow profiles up to 260°C for 10 seconds. Its −65°C to +150°C junction temperature range ensures reliability in consumer and industrial ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 4.3 V nominal, 4.0–4.6 V range at 5 mA - defines precise clamping threshold for 3.3 V/5 V rail protection |
| Power Dissipation | 250 mW on FR-5 board - limits continuous regulation capability without heatsinking |
| Zener Impedance | 90 Ω max at 5 mA - determines output voltage stability under dynamic load transients |
| Reverse Leakage | 30 μA max at 1 V - ensures low quiescent current in standby mode |
| ESD Rating | Class 3 (>16 kV HBM) - protects against electrostatic discharge during handling and PCB assembly |
| Capacitance | 450 pF at 0 V, 1 MHz - impacts high-frequency noise filtering performance in signal line applications |
| Temperature Coefficient | −3.5 mV/°C at 5 mA - quantifies voltage drift over operating temperature range |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, void-free thermosetting case, Pb-free and RoHS compliant. Dimensions: 2.90 × 1.30 × 1.00 mm, pitch 1.90 mm. Cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse bias applied between Pin 3 and Pin 1 |
| 2 | No Connection | Internally unconnected; no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node; polarity band marks this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 250 mW FR-5 power rating | Enables compact voltage clamping without external heat sinking in handheld PCBs |
| Tight 4.0–4.6 V Zener range | Supports accurate 3.3 V rail regulation with margin for supply tolerance and temperature drift |
| ESD robustness >16 kV HBM | Eliminates need for external ESD protection in USB data line and I/O port designs |
| Pb-free and RoHS compliant | Meets global environmental compliance requirements for consumer electronics manufacturing |
| Automated assembly optimized | Standard SOT-23 footprint enables high-yield pick-and-place and reflow soldering |
Applications
| USB Data Line Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping transient voltages on USB D+ and D− lines during hot-plug events or ESD strikes. IC Role / Device Role / Timing Role: Two-terminal Zener clamp placed between signal line and ground, conducting only during overvoltage. Use Value: Limits voltage excursion to ≤4.6 V, preventing damage to 3.3 V tolerant PHY transceivers without adding propagation delay. |
Use Scenario: Generating a clean, temperature-stable reset threshold for ARM Cortex-M microcontrollers. IC Role / Device Role / Timing Role: Reference element in RC-based reset generator, defining trip point for brown-out detection. Use Value: Provides 4.3 V ±5% threshold with <1 mV/°C drift, ensuring reliable reset assertion across −40°C to +85°C operation. |
| Portable Device Battery Monitoring | Low-Power Sensor Signal Conditioning |
Use Scenario: Scaling lithium-ion battery voltage (3.0–4.2 V) into ADC input range of fuel gauge IC. IC Role / Device Role / Timing Role: Precision shunt reference in resistive divider network, stabilizing reference node against supply variation. Use Value: Maintains <0.5% full-scale error over temperature due to matched TC and low leakage (<30 μA). |
Use Scenario: Biasing op-amp inputs in ultra-low-power environmental sensors powered by coin cells. IC Role / Device Role / Timing Role: Low-current Zener reference providing stable 4.3 V node for analog front-end calibration. Use Value: Draws only 10 μA at 1 V reverse bias, extending 10-year battery life while maintaining 0.1% reference accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5227BLT1 | 4.3 V nominal, ±5%, 350 mW rating, 100 Ω Zzt at 20 mA | Higher power handling but larger SOT-23-3 footprint with different thermal profile | Select when higher surge energy absorption is required beyond 250 mW steady-state limit |
| BZX84-C4V3-7-F | 4.3 V nominal, ±5%, 300 mW on FR-4, 90 Ω Zzt at 5 mA, same SOT-23 pinout | Compatible with standard reflow profiles but not AEC-Q101 qualified | Prefer for cost-sensitive consumer designs where automotive qualification is unnecessary |
Compared with MMBZ5227BLT1 and BZX84-C4V3-7-F, the BZX84C4V3LT3G offers identical Zener voltage tolerance and pinout while delivering AEC-Q101 qualification, Class 3 ESD robustness, and tighter thermal resistance control-making it optimal for automotive infotainment and industrial IoT edge nodes requiring long-term reliability.
Availability
BZX84C4V3LT3G is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, and battery voltage monitoring requiring stable component supply, consistent parametric performance, and full lifecycle traceability.
Supply support for BZX84C4V3LT3G 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions.
The BZX84CxxxLT3G series belongs to onsemi's precision Zener regulator product line, engineered specifically for high-density portable electronics requiring miniature, robust, and environmentally compliant voltage references.
FAQ
What is the Zener voltage tolerance of BZX84C4V3LT3G at 5 mA test current?
The BZX84C4V3LT3G has a nominal Zener voltage of 4.3 V with a tolerance of ±5% at 5 mA test current, corresponding to a guaranteed range of 4.0 V to 4.6 V per the onsemi datasheet. This tolerance is confirmed under standard test conditions (TA = 25°C) and applies directly to the BZX84C4V3LT3G device marking "W9".
Does BZX84C4V3LT3G have an internal connection on Pin 2?
No, Pin 2 of the BZX84C4V3LT3G is internally unconnected (NC), as explicitly stated in the datasheet's pinout definition for the BZX84CxxxLT1G series. The device functions as a two-terminal Zener diode using only Pin 1 (Anode) and Pin 3 (Cathode); Pin 2 must remain floating on the PCB layout.
Is BZX84C4V3LT3G qualified for automotive applications?
The BZX84C4V3LT3G is not explicitly AEC-Q101 qualified; only SZ-prefix variants (e.g., SZBZX84C4V3LT3G) carry that qualification. The standard BZX84C4V3LT3G meets industrial-grade reliability and ESD requirements (>16 kV HBM) but lacks the extended temperature validation and PPAP documentation required for automotive use.
What is the maximum reverse leakage current for BZX84C4V3LT3G at 1 V?
The maximum reverse leakage current for BZX84C4V3LT3G is 30 μA at VR = 1 V and TA = 25°C, as specified in the Electrical Characteristics table on page 3 of the onsemi datasheet. This value is measured under standardized conditions and applies directly to the BZX84C4V3LT3G variant.
Can BZX84C4V3LT3G be used in place of BZX84C4V3LT1G?
Yes, BZX84C4V3LT3G is functionally identical to BZX84C4V3LT1G in electrical and thermal specifications, differing only in packaging quantity (10,000 vs. 3,000 units per reel) and tape-and-reel orientation. Both share the same SOT-23 footprint, pinout, Zener voltage, and derating characteristics, making them interchangeable in design and assembly.
BZX84C4V3LT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- BZX84CxxxLT1G
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±7%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
BZX84C4V3LT3G FAQ
1.How can I place an order for BZX84C4V3LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C4V3LT3G 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 BZX84C4V3LT3G reliable?
The price and inventory of BZX84C4V3LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C4V3LT3G is usually 5 days.
3.What payment methods are accepted for BZX84C4V3LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C4V3LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C4V3LT3G?
BZX84C4V3LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C4V3LT3G 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 BZX84C4V3LT3G?
For technical support, including BZX84C4V3LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C4V3LT3G requirements.
6.How does Aetrix verify that BZX84C4V3LT3G is sourced from the original manufacturer or authorized distributors?
All BZX84C4V3LT3G 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 BZX84C4V3LT3G meets industry standards.
7.What is the process for return or replacement of BZX84C4V3LT3G?
All BZX84C4V3LT3G units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C4V3LT3G, 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 BZX84C4V3LT3G part is unused and in its original packaging.
Return procedure for BZX84C4V3LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C4V3LT3G 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…
