My Inquiry
My Account
onsemi SZBZX84C4V3LT1G
- Part No.:
- SZBZX84C4V3LT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C4V3LT1G.pdf
- Description:
- DIODE ZENER 4.3V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,087
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZBZX84C4V3LT1G from onsemi is a 4.3 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board at 25°C, with 90 Ω dynamic impedance at 5 mA test current and 3 μA reverse leakage at 1 V. It provides precision voltage regulation in space-constrained power rail protection and reference circuits for portable electronics.
For engineers reviewing the SZBZX84C4V3LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (500 °C/W), ESD rating (>16 kV HBM), junction temperature range (−65 to +150°C), and Pb-free RoHS compliance.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, requiring no external biasing. Its Zener breakdown mechanism delivers stable reverse conduction at 4.3 V nominal with −3.5 mV/°C temperature coefficient, enabling predictable drift compensation in low-power analog circuits.
The SOT-23 package supports automated placement and reflow soldering per JEDEC J-STD-020, with maximum soldering temperature of 260°C for 10 seconds. The "SZ" prefix confirms AEC-Q101 qualification and PPAP capability for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 4.0–4.6 V @ 5 mA - ensures regulated output within ±5% tolerance across production lots |
| Power Dissipation | 250 mW on FR-5 board - defines maximum continuous power handling without derating at 25°C |
| Zener Impedance | 90 Ω @ 5 mA - determines output voltage stability under varying load current |
| Reverse Leakage | 3 μA @ 1 V - limits standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - protects against electrostatic discharge during handling and assembly |
| Junction Temp Range | −65 to +150°C - supports operation in extended industrial and automotive environments |
| Capacitance | 450 pF @ 0 V, 1 MHz - impacts high-frequency noise filtering performance in bypass applications |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band; UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward-biased terminal; connects to lower-potential node in regulation path |
| 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad required |
| 3 | Cathode | Zener conduction terminal; connects to higher-potential node and regulates voltage drop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP documentation support and site-specific control change tracking |
| Pb-free & RoHS compliant | Meets EU Directive 2011/65/EU and China RoHS II; compatible with lead-free reflow profiles |
| Tight thermal resistance | 500 °C/W junction-to-ambient enables reliable operation up to 125°C ambient with 250 mW load |
| Optimized for high-density layout | 2.90 × 1.30 × 1.00 mm footprint minimizes PCB area in multi-rail portable designs |
| High ESD robustness | Class 3 HBM rating (>16 kV) eliminates need for external ESD protection in handheld interfaces |
Applications
| USB Power Delivery Clamp | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Clamping 5 V USB bus transients in portable chargers and OTG adapters. IC Role / Device Role / Timing Role: Zener clamping diode placed between VBUS and GND to shunt overvoltage spikes above 4.6 V. Use Value: Limits transient energy with 250 mW pulse handling and 3 μA leakage to preserve battery life during idle. |
Use Scenario: Providing stable 4.3 V reference for microcontroller ADC and sensor biasing in BCMs. IC Role / Device Role / Timing Role: Precision voltage reference source with −3.5 mV/°C TC for temperature-compensated calibration. Use Value: Maintains <±1% accuracy across −40 to +125°C operating range due to AEC-Q101 validation and tight VZ tolerance. |
| Smartphone Battery Protection IC Bias | Industrial IoT Sensor Node Regulator |
Use Scenario: Supplying regulated bias voltage to fuel gauge ICs and charge management controllers. IC Role / Device Role / Timing Role: Low-leakage Zener regulator feeding internal LDO input or comparator reference inputs. Use Value: Enables ultra-low quiescent current design with only 3 μA reverse leakage at 1 V VR, extending standby time. |
Use Scenario: Generating local 4.3 V rail for MEMS pressure sensors and low-power wireless SoCs in edge nodes. IC Role / Device Role / Timing Role: Primary voltage regulation element in discrete linear regulator stage before LDO post-regulation. Use Value: Delivers stable regulation with 90 Ω ZT and 450 pF capacitance-minimizing noise coupling into sensitive analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C4V3LT1G | Same electrical specs but lacks SZ-prefix AEC-Q101 qualification and PPAP support | Not approved for automotive production; suitable for commercial-grade consumer devices only | Select when cost sensitivity outweighs automotive compliance requirements |
| SZBZX84C4V7LT1G | Higher nominal Zener voltage (4.7 V vs. 4.3 V); identical tolerance, package, and thermal specs | Used where 4.7 V reference or clamp threshold is required instead of 4.3 V | Choose when system-level voltage margin analysis requires 4.7 V regulation point |
Compared with BZX84C4V3LT1G and SZBZX84C4V7LT1G, the SZBZX84C4V3LT1G uniquely combines automotive qualification with 4.3 V regulation-enabling single-part sourcing across commercial and automotive programs without redesign or layout changes.
Availability
SZBZX84C4V3LT1G is available at Aetrix Electronics and suitable for USB power protection, automotive body control modules, smartphone battery management, and industrial IoT sensor nodes requiring stable component supply and long-term lifecycle continuity.
Supply support for SZBZX84C4V3LT1G 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, medical, and IoT applications.
The SZBZX84CxxxLT1G series belongs to onsemi's automotive-qualified Zener regulator portfolio, designed specifically for voltage reference, overvoltage clamping, and bias generation in safety-critical and high-reliability electronic control units.
FAQ
What is the Zener voltage tolerance of SZBZX84C4V3LT1G?
The SZBZX84C4V3LT1G has a nominal Zener voltage of 4.3 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 4.0 V and 4.6 V when tested at 5 mA. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet, and applies across the full operating temperature range of −65°C to +150°C.
Is SZBZX84C4V3LT1G suitable for automotive applications?
Yes, SZBZX84C4V3LT1G is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix explicitly indicating compliance for automotive and other applications requiring unique site and control change requirements. Its qualification covers thermal cycling, humidity testing, and mechanical shock per AEC standards, making it appropriate for body control modules and infotainment power rails.
What is the pin configuration of SZBZX84C4V3LT1G?
SZBZX84C4V3LT1G uses the SOT-23 package with pinout: Pin 1 = Anode, Pin 2 = No Connection (internally unconnected), Pin 3 = Cathode. This configuration is documented in the marking diagram and Electrical Characteristics section of the datasheet, and must be observed to avoid functional failure or damage during circuit operation.
How does the thermal performance of SZBZX84C4V3LT1G compare between FR-5 and alumina substrates?
SZBZX84C4V3LT1G delivers 250 mW power dissipation on FR-5 board (500 °C/W RJA) versus 300 mW on alumina substrate (417 °C/W RJA). The lower thermal resistance on alumina allows higher power handling at elevated ambient temperatures, while the FR-5 rating reflects typical PCB material usage in cost-sensitive consumer and industrial designs.
Does SZBZX84C4V3LT1G require external current limiting in Zener regulator circuits?
Yes, SZBZX84C4V3LT1G requires an external series resistor to limit forward current during Zener conduction. The resistor value must ensure that maximum power dissipation (250 mW) is not exceeded at worst-case input voltage and load conditions. Typical designs use 100–1 kΩ resistors depending on supply voltage and load current requirements.
SZBZX84C4V3LT1G 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):
- 4.3 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZBZX84C4V3LT1G FAQ
1.How can I place an order for SZBZX84C4V3LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C4V3LT1G 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 SZBZX84C4V3LT1G reliable?
The price and inventory of SZBZX84C4V3LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C4V3LT1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C4V3LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C4V3LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C4V3LT1G?
SZBZX84C4V3LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C4V3LT1G 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 SZBZX84C4V3LT1G?
For technical support, including SZBZX84C4V3LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C4V3LT1G requirements.
6.How does Aetrix verify that SZBZX84C4V3LT1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C4V3LT1G 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 SZBZX84C4V3LT1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C4V3LT1G?
All SZBZX84C4V3LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C4V3LT1G, 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 SZBZX84C4V3LT1G part is unused and in its original packaging.
Return procedure for SZBZX84C4V3LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C4V3LT1G 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…
