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Diodes Incorporated BZX84C4V3S-7
- Part No.:
- BZX84C4V3S-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BZX84C4V3S-7.pdf
- Description:
- DIODE ZENER ARRAY 4.3V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:8,599
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Product details
Overview
BZX84C4V3S-7 from Diodes Incorporated is a dual 200mW surface-mount Zener diode in SOT-363 package, rated for nominal zener voltage 4.3V (±0.3V tolerance), 5mA test current, 90Ω max zener impedance at 5mA, and -3.5 to 0 mV/°C temperature coefficient. It provides precision voltage regulation in compact power management circuits.
For engineers reviewing the BZX84C4V3S-7 datasheet, BZX84C4V3S-7 pinout, BZX84C4V3S-7 application, or BZX84C4V3S-7 equivalent, key selection criteria include zener voltage stability across temperature, low dynamic impedance for noise-sensitive references, SOT-363 footprint compatibility, and RoHS-compliant lead-free plating for high-reliability PCB assembly.
Technical Context
This dual-element Zener diode integrates two independent 4.3V zener junctions in a single SOT-363 package, enabling space-constrained dual-reference or redundancy designs. Each element operates with 5mA test current and exhibits 90Ω maximum zener impedance at 1kHz, supporting stable regulation under moderate load transients.
The device features planar die construction, UL 94V-0 molded plastic case, and a thermal resistance of 625°C/W (junction-to-ambient on FR4 board). Its operating temperature range spans -65°C to +150°C, with a zener voltage temperature coefficient between -3.5 and 0 mV/°C at 5mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.3 V - precise reference voltage at 5 mA test current, ±0.3 V tolerance band |
| Zener Impedance (ZZT) | 90 Ω max at 5 mA - ensures minimal output voltage variation under small-signal load changes |
| Power Dissipation | 200 mW - limits continuous thermal stress on FR4 PCB with recommended pad layout |
| Reverse Current (IR) | 3.0 µA max at VR = 1.0 V - defines leakage-limited accuracy in low-power bias networks |
| Temperature Coefficient | -3.5 to 0 mV/°C - enables predictable drift compensation in ambient-varying environments |
| Package | SOT-363 - ultra-small 6-pin surface-mount outline (2.2 mm × 1.35 mm × 0.9 mm) with dual anode/cathode configuration |
Pinout & Package
SOT-363 package with six terminals: two isolated Zener diode elements sharing common cathode connections per element; polarity confirmed by top-view marking diagram (KZH) and internal schematic.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Unbonded terminal; electrically isolated, no routing required |
| 2 (C1) | Cathode Element 1 | Primary cathode for first Zener diode; connects to regulated output node |
| 3 (A1) | Anode Element 1 | Input terminal for first Zener; ties to unregulated supply or bias source |
| 4 (A2) | Anode Element 2 | Independent input for second Zener; supports dual-reference or mirrored topology |
| 5 (C2) | Cathode Element 2 | Second regulated output node; enables separate voltage rail generation |
| 6 (NC) | No Connect | Unbonded terminal; must remain floating per mechanical design |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent Zener elements | Two 4.3V regulation paths in one SOT-363 footprint-reduces board area vs. discrete dual-diode solutions |
| Planar die construction | Enables tight voltage tolerance (±0.3V) and repeatable zener impedance (90Ω max) across production lots |
| Lead-free/RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe-meets IPC-J-STD-020D Level 1 moisture sensitivity for standard reflow |
| UL 94V-0 flammability rating | Molded plastic case withstands sustained flame exposure-required for industrial and automotive PCB safety compliance |
Applications
| USB Power Monitoring | Industrial Sensor Biasing |
|---|---|
Use Scenario: Monitoring 5V USB bus voltage with microcontroller ADC input via resistive divider. IC Role / Device Role / Timing Role: Precision 4.3V reference clamping diode protecting ADC input from overvoltage events. Use Value: 90Ω zener impedance minimizes divider ratio error; -3.5 mV/°C TC ensures <±1% reference shift over -40°C to +85°C. | Use Scenario: Providing stable bias voltage to analog front-end of pressure sensor in factory automation node. IC Role / Device Role / Timing Role: Dual-element configuration supplies matched reference and calibration offset voltages. Use Value: Two independent 4.3V elements eliminate inter-channel tracking error; SOT-363 saves >40% board area vs. two SOT-23 devices. |
| Automotive ECU Voltage Clamp | IoT Node Battery Protection |
Use Scenario: Clamping LIN bus transceiver supply rail against load-dump transients in 12V vehicle systems. IC Role / Device Role / Timing Role: Fast-response Zener element absorbing surge energy while maintaining 4.3V logic interface level. Use Value: 200mW dissipation handles 100ms pulses; -65°C to +150°C rating supports under-hood operation. | Use Scenario: Regulating coin-cell-supplied RTC and memory backup voltage in wearable health monitor. IC Role / Device Role / Timing Role: Low-leakage (3µA @ 1V) Zener maintains accurate 4.3V threshold during deep sleep mode. Use Value: Sub-µA reverse current extends battery life beyond 3 years; RoHS/Green compliance meets medical device directives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5229BS-7-F | Single-element 4.3V Zener in SOT-363; 100Ω max ZZT, 5µA IR @ 1V | Lacks dual-element capability; suitable only for single-rail reference | Select when board space allows separate placement or dual functionality is unnecessary |
| BZX84C4V3LT1G | Single-element 4.3V Zener in SOT-23; 90Ω max ZZT, 3µA IR @ 1V; same TC range | Requires two devices and additional PCB area for dual-rail use | Prefer when legacy SOT-23 footprint compatibility is mandatory |
Compared with MMBZ5229BS-7-F and BZX84C4V3LT1G, BZX84C4V3S-7 uniquely delivers dual 4.3V regulation in one SOT-363, reducing component count by 50% and eliminating inter-device parameter mismatch in matched-reference designs.
Availability
BZX84C4V3S-7 is available at Aetrix Electronics and suitable for USB power monitoring, industrial sensor biasing, automotive ECU voltage clamping, and IoT node battery protection requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for BZX84C4V3S-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The BZX84 series belongs to Diodes' precision Zener diode product line, engineered for voltage regulation, reference, and overvoltage protection in space-constrained consumer, industrial, and automotive applications.
FAQ
What is the maximum power dissipation for BZX84C4V3S-7 under standard PCB conditions?
The BZX84C4V3S-7 has a rated power dissipation of 200 mW when mounted on an FR4 PCB using Diodes Incorporated's recommended pad layout (AP02001.pdf). Derating begins above 25°C ambient, reaching zero dissipation at 150°C due to its 625°C/W thermal resistance.
How does the dual-element structure affect circuit layout compared to single Zener diodes?
The dual-element SOT-363 footprint integrates two independent 4.3V Zeners with shared cathode/anode pin assignments (Pins 2/3 and 5/4), enabling matched reference generation without inter-device thermal or parametric drift. Layout requires no extra decoupling or matching traces beyond standard SOT-363 pad geometry.
Is BZX84C4V3S-7 compatible with lead-free reflow profiles?
Yes-BZX84C4V3S-7 uses matte tin plating over Alloy 42 leadframe and meets J-STD-020D Level 1 moisture sensitivity. It supports standard Pb-free reflow profiles up to 260°C peak temperature without delamination or solder joint integrity issues.
What is the significance of the "-7" suffix in the part number?
The "-7" suffix denotes tape-and-reel packaging: 3000 units per reel in SOT-363 carrier tape, compliant with EIA-481 standards. This format enables automated pick-and-place assembly and is distinct from bulk or cut-tape variants (e.g., "-7-F" adds RoHS compliance marking).
BZX84C4V3S-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Configuration:
- 2 Independent
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±6%
- Power - Max:
- 200 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
BZX84C4V3S-7 FAQ
1.How can I place an order for BZX84C4V3S-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C4V3S-7 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 BZX84C4V3S-7 reliable?
The price and inventory of BZX84C4V3S-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C4V3S-7 is usually 5 days.
3.What payment methods are accepted for BZX84C4V3S-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C4V3S-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C4V3S-7?
BZX84C4V3S-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C4V3S-7 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 BZX84C4V3S-7?
For technical support, including BZX84C4V3S-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C4V3S-7 requirements.
6.How does Aetrix verify that BZX84C4V3S-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C4V3S-7 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 BZX84C4V3S-7 meets industry standards.
7.What is the process for return or replacement of BZX84C4V3S-7?
All BZX84C4V3S-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C4V3S-7, 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 BZX84C4V3S-7 part is unused and in its original packaging.
Return procedure for BZX84C4V3S-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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