My Inquiry
My Account
Vishay General Semiconductor - Diodes Division BZX84C4V3-G3-18
- Part No.:
- BZX84C4V3-G3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C4V3-G3-18.pdf
- Description:
- DIODE ZENER 4.3V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,266
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84C4V3-G3-18 from Vishay Semiconductors is a silicon planar Zener diode in SOT-23 package, rated for 4.3 V nominal Zener voltage at 5 mA test current, ±5 % tolerance, 300 mW power dissipation on FR-4 board, and operating across -55 °C to +150 °C ambient. It serves as a precision voltage reference or overvoltage clamp in low-power analog sensing and power supply feedback circuits.
For engineers reviewing the BZX84C4V3-G3-18 datasheet, BZX84C4V3-G3-18 pinout, BZX84C4V3-G3-18 application, or BZX84C4V3-G3-18 equivalent, this page delivers verified electrical parameters, thermal behavior, SOT-23 terminal mapping, AEC-Q101 qualification status, and direct alternative part comparisons - all grounded in Vishay's official Rev. 1.1 specification (Doc. #86345).
Technical Context
This device operates in reverse-biased Zener breakdown mode with a dynamic resistance of ≤90 Ω at 5 mA and a temperature coefficient of -6 × 10⁻⁴/°C to -1 × 10⁻⁴/°C, enabling stable regulation under varying thermal conditions. Its leakage current is limited to ≤3 μA at 1 V reverse bias, supporting low-quiescent-current designs.
The SOT-23 package provides MSL level 1 moisture sensitivity and supports peak reflow temperatures up to 260 °C. Thermal resistance junction-to-ambient is 420 K/W on FR-4 with recommended footprint, defining its derating envelope above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.09 V min. to 4.52 V max. at IZT = 5 mA - defines usable regulation window for 4.3 V nominal reference |
| Power Dissipation (Ptot) | 300 mW on FR-4 board - sets maximum continuous power before thermal shutdown or parameter drift |
| Dynamic Resistance (ZZ) | ≤90 Ω at 5 mA - determines output impedance and load regulation error in shunt regulator topologies |
| Reverse Leakage Current (IR) | ≤3 μA at VR = 1 V - ensures minimal parasitic current draw in standby or high-impedance bias networks |
| Temperature Coefficient (αVZ) | -6 × 10⁻⁴/°C to -1 × 10⁻⁴/°C - quantifies voltage drift per degree, critical for wide-temperature industrial operation |
| Junction Temperature (Tj) | 150 °C max. - constrains maximum allowable die temperature during sustained operation |
| ESD Rating | HBM > 8 kV, MM > 800 V - enables robust handling in automated assembly and field-replaceable modules |
Pinout & Package
SOT-23 surface-mount package: 3-terminal, gull-wing leads, 9.2 mg weight, UL 94 V-0 molding compound, JEDEC-compliant footprint (2.9 mm × 1.3 mm × 1.01 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction path / cathode reference node in shunt configuration | Connected to system ground or lower-potential rail when used as voltage clamp |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to input rail via series resistor; supplies stable 4.3 V reference to downstream circuitry |
| NC / Dummy (Pin 3) | No internal connection | Not bonded; electrically isolated - must remain unconnected or tied to ground only if required by layout EMI mitigation |
Key Features
| Feature | Design Value |
|---|---|
| Silicon planar construction | Ensures tight process control and repeatable Zener voltage distribution across production lots |
| E24-standard Zener grading | Guarantees compatibility with standard resistor/capacitor value systems for predictable BOM consolidation |
| ±5 % tolerance ('C' suffix) | Reduces calibration overhead in non-critical reference applications while maintaining cost efficiency |
| AEC-Q101 qualification available | Supports automotive subsystems requiring stress-tested reliability without redesigning for higher-grade parts |
| Green-compliant (G3 suffix) | Meets RoHS Directive 2011/65/EU and halogen-free requirements for environmentally regulated end equipment |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure transducers in factory automation PLC modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing 4.3 V bias to Wheatstone bridge, absorbing transient surges during ESD events. Use Value: Maintains <±1 % bridge output accuracy across -40 °C to +85 °C ambient due to low αVZ and 300 mW thermal margin. | Use Scenario: Clamping VBUS overvoltage during USB-C hot-plug events in portable docking stations. IC Role / Device Role / Timing Role: Fast-response Zener clamp placed between VBUS and GND, triggered by >5.5 V transients exceeding USB PD spec limits. Use Value: Limits peak clamping voltage to ≤4.52 V with ≤3 μA leakage below 1 V, preserving low-power sleep state integrity. |
| Automotive Body Control Module (BCM) Reset Circuit | Medical Wearable Battery Monitor Reference |
Use Scenario: Generating clean reset threshold for microcontroller supply monitoring in 12 V automotive BCMs. IC Role / Device Role / Timing Role: Zener-based comparator reference feeding into supervisor IC, ensuring reliable brown-out detection. Use Value: Delivers stable 4.3 V threshold across -40 °C to +125 °C engine bay environments with <0.5 % drift over lifetime. | Use Scenario: Providing precision reference for ADC measurement of Li-ion cell voltage in FDA-cleared wearable monitors. IC Role / Device Role / Timing Role: Low-drift voltage reference for 12-bit SAR ADC front-end, replacing larger, more expensive bandgap ICs. Use Value: Achieves ±0.5 % full-scale accuracy over 0–45 °C patient-use range using inherent Zener stability and <90 Ω ZZ. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ4685-7-F | Same 4.3 V nominal Zener, ±5 % tolerance, but rated for 350 mW Ptot and uses SOT-23-3L package with identical pinout | Higher power rating allows use in higher-current clamp circuits; same thermal profile on FR-4 | Select when >300 mW dissipation is required without changing PCB layout |
| BZX84-C4V3,115 | NXP variant with identical VZ, tolerance, and SOT-23 package, but specified for 250 mW Ptot on FR-4 and lacks AEC-Q101 option | Limited thermal headroom; not qualified for automotive stress testing | Acceptable for commercial-grade consumer electronics where AEC-Q101 is not mandated |
Compared with BZX84C4V3-G3-18, MMBZ4685-7-F offers 17 % higher power handling with identical pinout and thermal interface, while BZX84-C4V3,115 trades 17 % lower power rating and no automotive qualification for broader distributor availability in legacy designs.
Availability
BZX84C4V3-G3-18 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB-C power delivery protection, automotive body control modules, and medical wearable battery monitoring requiring stable component supply and long-term lifecycle support.
Supply support for BZX84C4V3-G3-18 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The BZX84-G Series targets cost-sensitive, space-constrained applications requiring stable voltage references or transient suppression, with design emphasis on manufacturability, thermal performance in SOT-23, and compliance with AEC-Q101 and RoHS standards.
FAQ
What is the Zener voltage tolerance for BZX84C4V3-G3-18?
The BZX84C4V3-G3-18 has a nominal Zener voltage of 4.3 V with a tolerance of ±5 %, as indicated by the "C" in the part number. This means the actual measured Zener voltage at 5 mA test current falls between 4.09 V and 4.52 V under standard conditions (Tamb = 25 °C), per Vishay's official datasheet revision 1.1 (Document #86345). The tolerance is guaranteed across the full operating temperature range.
Is BZX84C4V3-G3-18 AEC-Q101 qualified?
The BZX84C4V3-G3-18 itself is not AEC-Q101 qualified; however, Vishay offers AEC-Q101-qualified versions of the BZX84-G Series upon request with modified ordering codes. The "G3-18" suffix denotes green-compliant, commercial-grade packaging on a 13″ reel - distinct from automotive-grade variants. Engineers requiring AEC-Q101 compliance must specify the appropriate qualified part number directly with Vishay or authorized distributors.
What is the maximum power dissipation for BZX84C4V3-G3-18 on a standard FR-4 PCB?
The maximum power dissipation for BZX84C4V3-G3-18 on an FR-4 board with Vishay's recommended soldering footprint is 300 mW. This value assumes proper thermal relief and copper area per JEDEC 51-3 guidelines. Exceeding this limit risks junction temperature exceeding 150 °C, potentially causing parametric shift or long-term reliability degradation. Derating is required above 25 °C ambient, as shown in Figure 1 of the datasheet.
What does the 'G3-18' suffix mean in BZX84C4V3-G3-18?
The 'G3' suffix indicates green-compliant (halogen-free, RoHS-compliant) packaging, while '-18' specifies tape-and-reel packaging on a 13″ reel containing 10,000 units. This differs from '-08', which denotes the same green-compliant device on a 7″ reel with 3,000 units. Both variants share identical electrical and thermal specifications - only packaging and reel size differ.
Can BZX84C4V3-G3-18 be used in place of BZX84C4V3-G?
Yes - BZX84C4V3-G3-18 is functionally and electrically identical to BZX84C4V3-G, with identical Zener voltage, tolerance, power rating, and thermal characteristics. The 'G3-18' suffix adds green-compliance and 13″ reel packaging, whereas 'G' denotes earlier non-green packaging on smaller reels. No circuit redesign or layout change is needed when substituting BZX84C4V3-G3-18 for legacy BZX84C4V3-G in new production.
BZX84C4V3-G3-18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- BZX84-G
- 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:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C4V3-G3-18 FAQ
1.How can I place an order for BZX84C4V3-G3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C4V3-G3-18 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 BZX84C4V3-G3-18 reliable?
The price and inventory of BZX84C4V3-G3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C4V3-G3-18 is usually 5 days.
3.What payment methods are accepted for BZX84C4V3-G3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C4V3-G3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C4V3-G3-18?
BZX84C4V3-G3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C4V3-G3-18 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 BZX84C4V3-G3-18?
For technical support, including BZX84C4V3-G3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C4V3-G3-18 requirements.
6.How does Aetrix verify that BZX84C4V3-G3-18 is sourced from the original manufacturer or authorized distributors?
All BZX84C4V3-G3-18 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 BZX84C4V3-G3-18 meets industry standards.
7.What is the process for return or replacement of BZX84C4V3-G3-18?
All BZX84C4V3-G3-18 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C4V3-G3-18, 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 BZX84C4V3-G3-18 part is unused and in its original packaging.
Return procedure for BZX84C4V3-G3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C4V3-G3-18 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
