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Diodes Incorporated BZX84C4V7W-7
- Part No.:
- BZX84C4V7W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84C4V7W-7.pdf
- Description:
- DIODE ZENER 4.7V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,932
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Product details
Overview
BZX84C4V7W-7 from Diodes Incorporated is a 4.7 V, 200 mW surface-mount Zener diode in SOT-323 package, rated for 5 mA test current with 80 Ω dynamic impedance and ±0.2 mV/°C temperature coefficient, used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the BZX84C4V7W-7 datasheet, BZX84C4V7W-7 pinout, BZX84C4V7W-7 application, or BZX84C4V7W-7 equivalent, key selection criteria include nominal Zener voltage tolerance (±0.3 V), reverse leakage at 2 V (≤3.0 µA), thermal resistance (625 K/W), and RoHS-compliant green molding compound construction.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. It features planar die construction for consistent parametric performance and low capacitance (typ. 30 pF at 1 V), supporting use in noise-sensitive signal conditioning paths.
The device exhibits a near-zero temperature coefficient (–3.5 to +0.2 mV/°C) at 5 mA, enabling stable reference behavior over –65°C to +125°C ambient range. Its 200 mW power rating and 625 K/W junction-to-ambient thermal resistance require careful PCB pad layout per AP02001 for reliable derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal, 4.4–5.0 V min/max at IZT = 5 mA - defines regulated output voltage window |
| Power Dissipation (PD) | 200 mW at TA = 25°C - sets maximum continuous reverse power handling on FR4 board |
| Zener Impedance (ZZT) | 80 Ω max at f = 1 kHz, IZT = 5 mA - determines regulation stiffness under load transients |
| Reverse Leakage (IR) | ≤3.0 µA at VR = 2.0 V - ensures minimal quiescent current in standby bias networks |
| Temp. Coefficient (αVZ) | –3.5 to +0.2 mV/°C at IZT = 5 mA - enables stable reference over industrial temperature range |
| Package | SOT-323 - ultra-small 3-pin surface-mount outline (2.2 × 1.35 × 0.9 mm) for high-density PCBs |
| RoHS Compliance | Lead-free, green molding compound (halogen-free, UL 94V-0) - meets environmental and safety requirements |
Pinout & Package
SOT-323 package with anode-cathode-anode terminal configuration: Cathode marked by band; pin 1 = anode, pin 2 = cathode, pin 3 = anode (dual-anode structure with common cathode). Molded plastic case, matte tin-plated alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Forward conduction path | Connects to lower-potential node in reverse-biased Zener operation; unused in standard regulation |
| Pin 2 (Cathode) | Zener breakdown terminal | Connected to higher-potential node; voltage referenced to this terminal during regulation |
| Pin 3 (Anode) | Second forward path | Electrically identical to Pin 1; provides mechanical symmetry and dual-anode flexibility |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight parameter distribution and long-term stability of Zener voltage and impedance |
| Ultra-small SOT-323 footprint | Enables placement in space-constrained designs such as portable sensors and wearables |
| Green molding compound (UL 94V-0) | Eliminates halogen-based flame retardants while maintaining fire safety compliance |
| Moisture sensitivity Level 1 | Allows unlimited floor life without dry-packaging or baking prior to reflow |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 4.7 V reference for ADC voltage dividers or op-amp biasing in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Precision shunt voltage reference establishing known potential for analog signal chains. Use Value: Delivers <±0.3 V tolerance and <80 Ω impedance to minimize reference drift under 1–5 mA load variation. | Use Scenario: Protecting microcontroller GPIO pins from ESD-induced voltage spikes up to ±8 kV. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting transient voltage to ≤5.0 V peak. Use Value: Activates within nanoseconds at 2.0 V reverse bias (IR ≤3 µA), clamping without parasitic delay. |
| Signal Level Shifting | Current Source Bias |
Use Scenario: Translating 3.3 V logic signals to 4.7 V interface levels in mixed-voltage sensor subsystems. IC Role / Device Role / Timing Role: Passive level translator using Zener forward drop (~0.9 V) and reverse breakdown. Use Value: Enables bidirectional translation with <100 ns response and no active components or supply rails. | Use Scenario: Generating stable 1 mA bias current for photodiode amplifiers in optical smoke detectors. IC Role / Device Role / Timing Role: Constant-current sink via series resistor + Zener voltage reference. Use Value: Maintains ±2% current accuracy over –40°C to +85°C due to low αVZ and stable ZZT. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ4685-7-F | Same 4.7 V nominal, but 350 mW PD, 50 Ω ZZT, SOT-23 package | Higher power handling supports >5 mA loads; larger footprint limits ultra-dense layouts | Select when >200 mW dissipation or lower impedance is required |
| BZX84-C4V7 | Identical electrical specs, but non-RoHS SOT-23 package with leaded finish | Not compliant with modern environmental mandates; unsuitable for export or medical end equipment | Select only for legacy repair or non-regulated internal prototypes |
Compared with MMBZ4685-7-F and BZX84-C4V7, BZX84C4V7W-7 uniquely balances ultra-compact SOT-323 size, full RoHS/green compliance, and industrial-grade thermal stability - making it optimal for new designs targeting miniaturization and regulatory alignment.
Availability
BZX84C4V7W-7 is available at Aetrix Electronics and suitable for power supply references, overvoltage clamps, signal level shifters, and current source bias circuits requiring stable component supply and full RoHS compliance.
Supply support for BZX84C4V7W-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, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The BZX84C series belongs to Diodes' precision Zener diode product line, engineered specifically for low-power voltage regulation and reference applications where compact size, tight tolerance, and temperature stability are critical.
FAQ
What is the maximum reverse voltage before breakdown for BZX84C4V7W-7?
The nominal Zener voltage is 4.7 V with guaranteed minimum and maximum values of 4.4 V and 5.0 V respectively at 5 mA test current. Breakdown begins gradually below 4.4 V and is fully established by 5.0 V; operation above 5.0 V risks exceeding power limits unless current is strictly limited.
Can BZX84C4V7W-7 be used in forward-bias mode like a standard diode?
Yes - it exhibits 0.9 V forward voltage at 10 mA, matching typical silicon diode behavior. However, its primary design intent and characterization are for reverse-bias Zener operation; forward conduction is secondary and not optimized for switching speed or surge current.
Is the SOT-323 package compatible with standard reflow soldering profiles?
Yes - the device is rated for moisture sensitivity Level 1 per J-STD-020D, allowing indefinite exposure to ambient conditions before reflow. It supports standard Pb-free reflow profiles (peak 260°C), with recommended pad layout documented in Diodes' AP02001 application note.
How does the temperature coefficient affect regulation accuracy over –40°C to +85°C?
With αVZ ranging from –3.5 to +0.2 mV/°C, total Zener voltage drift over 125°C span is ≤±0.44 V - adding ~±9% error to the 4.7 V nominal. For tighter accuracy, pair with temperature-compensated bias networks or select tighter-tolerance variants like BZX84C4V7LT1G.
BZX84C4V7W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±6%
- Power - Max:
- 200 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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84C4V7W-7 FAQ
1.How can I place an order for BZX84C4V7W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C4V7W-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 BZX84C4V7W-7 reliable?
The price and inventory of BZX84C4V7W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C4V7W-7 is usually 5 days.
3.What payment methods are accepted for BZX84C4V7W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C4V7W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C4V7W-7?
BZX84C4V7W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C4V7W-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 BZX84C4V7W-7?
For technical support, including BZX84C4V7W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C4V7W-7 requirements.
6.How does Aetrix verify that BZX84C4V7W-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C4V7W-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 BZX84C4V7W-7 meets industry standards.
7.What is the process for return or replacement of BZX84C4V7W-7?
All BZX84C4V7W-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C4V7W-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 BZX84C4V7W-7 part is unused and in its original packaging.
Return procedure for BZX84C4V7W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C4V7W-7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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