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Diodes Incorporated BZX84C4V7T-7-F
- Part No.:
- BZX84C4V7T-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
BZX84C4V7T-7-F.pdf
- Description:
- DIODE ZENER 4.7V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:9,207
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Product details
Overview
BZX84C4V7T-7-F from Diodes Incorporated is a 4.7 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for ±0.3 V tolerance at 5 mA test current, with 80 Ω maximum Zener impedance and -3.5 to +0.2 mV/°C temperature coefficient - used for precision voltage reference and overvoltage clamping in low-power sensor signal conditioning circuits.
For engineers reviewing the BZX84C4V7T-7-F datasheet, BZX84C4V7T-7-F pinout, BZX84C4V7T-7-F application, or BZX84C4V7T-7-F equivalent, key selection considerations include nominal Zener voltage (4.7 V), power dissipation limit (150 mW), thermal resistance (833 °C/W), reverse leakage at 2 V (≤3.0 µA), and RoHS-compliant green packaging.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across 1–5 mA operating range. Its planar die construction ensures stable Zener characteristics and low dynamic impedance (80 Ω @ 5 mA) under DC and low-frequency transient conditions.
The device exhibits a negative-to-slightly-positive temperature coefficient (-3.5 to +0.2 mV/°C), enabling predictable drift behavior in ambient temperatures from -65 °C to +150 °C. It is optimized for low-current biasing and voltage stabilization in space-constrained portable electronics.
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) | 150 mW - limits continuous DC power handling on FR-4 PCB with standard pad layout |
| Zener Impedance (ZZT) | 80 Ω max @ 5 mA - determines regulation stiffness under load variation |
| Reverse Leakage (IR) | ≤3.0 µA @ VR = 2.0 V - ensures minimal quiescent current in standby bias networks |
| Temp Coefficient (αVZ) | -3.5 to +0.2 mV/°C @ 5 mA - quantifies voltage drift per degree Celsius over operating range |
| Package | SOT-523 - 1.6 mm × 0.8 mm footprint, 0.22 mm height, suitable for 0201-class automated placement |
Pinout & Package
Two-terminal device in SOT-523 package: anode and cathode marked per top-view schematic (cathode indicated by band). No internal pin numbering; terminals are unidirectional and polarity-critical for reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to lower-potential side of bias network; establishes reference return path |
| Cathode | Reverse-bias input / regulated output node | Connected to supply rail or signal line requiring clamping; delivers stabilized 4.7 V reference |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | Enables integration into high-density PCBs where board space is constrained to <1.3 mm² |
| Planar die construction | Delivers repeatable Zener voltage distribution and improved long-term stability vs. diffused junctions |
| Lead-free & RoHS-compliant | Meets IPC-J-STD-020D Level 1 moisture sensitivity and global environmental compliance mandates |
| Green molding compound | Halogen-free encapsulation (post-UO date code) eliminates Sb₂O₃ flame retardants for safer end-of-life processing |
Applications
| Portable Sensor Biasing | USB Peripheral Voltage Clamp |
|---|---|
Use Scenario: Providing stable 4.7 V reference for analog front-end of MEMS accelerometers in battery-powered wearables. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, regulating bias current to op-amp input stage. Use Value: Maintains <±1% reference accuracy across -20 °C to +70 °C, minimizing sensor offset drift without active regulation. | Use Scenario: Clamping USB D+ line against ESD transients in OTG-enabled microcontrollers. IC Role / Device Role / Timing Role: Fast-reacting shunt protector limiting line voltage to 4.7 V during 8 kV HBM events. Use Value: Limits peak clamped voltage to within USB 2.0 data-line tolerance (0–3.6 V) while surviving >1000 strikes. |
| Low-Power RTC Backup | Industrial I/O Signal Conditioning |
Use Scenario: Supplying clean 4.7 V bias to real-time clock oscillator circuit during main power loss. IC Role / Device Role / Timing Role: Passive voltage stabilizer for crystal oscillator buffer IC during coin-cell backup operation. Use Value: Draws only 0.5 µA at 3.0 V input, extending CR2032 life beyond 5 years while holding frequency stability ±10 ppm. | Use Scenario: Level-shifting and overvoltage protection for 4–20 mA loop transmitter outputs. IC Role / Device Role / Timing Role: Zener clamp placed across current-output DAC output to prevent damage from induced surges. Use Value: Absorbs up to 150 mW surge energy without degradation, maintaining loop integrity during 1 kV ring-wave transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ4685-7-F | Same 4.7 V nominal, but higher PD = 300 mW and SOT-23 package (larger footprint) | Preferred where higher surge energy absorption is required; not suitable for ultra-dense layouts | Select when thermal margin >150 mW is needed and board area permits SOT-23 |
| BZX84-C4V7,115 | Identical electrical specs but in SOT-23 package and non-RoHS plating (SnPb) | Restricted to legacy industrial systems exempt from RoHS; incompatible with lead-free reflow | Choose only for backward-compatible repair or non-RoHS production environments |
Compared with MMBZ4685-7-F and BZX84-C4V7,115, BZX84C4V7T-7-F offers optimal balance of miniaturization, RoHS compliance, and thermal performance for new designs targeting portable and consumer electronics.
Availability
BZX84C4V7T-7-F is available at Aetrix Electronics and suitable for portable sensor biasing, USB peripheral voltage clamp, and low-power RTC backup requiring stable component supply with full traceability and lifecycle support.
Supply support for BZX84C4V7T-7-F 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 centers across Asia and manufacturing in China, Taiwan, and the U.S.
This part belongs to the BZX84C series of low-power Zener diodes designed specifically for voltage regulation and transient suppression in compact, cost-sensitive consumer and industrial electronics.
FAQ
What is the maximum reverse voltage (VR) this Zener can withstand before breakdown?
The BZX84C4V7T-7-F has a nominal Zener voltage of 4.7 V, with breakdown occurring between 4.4 V and 5.0 V at 5 mA test current. It is not rated for forward blocking - its absolute maximum reverse voltage is defined by the Zener knee; operation above 5.0 V risks thermal runaway unless current is strictly limited to ≤5 mA.
Can this device be used in place of a 5.1 V Zener for general-purpose clamping?
No - the BZX84C4V7T-7-F is specified at 4.7 V (4.4–5.0 V range), which falls below the 4.8–5.4 V range of the BZX84C5V1T. Substituting it for a 5.1 V Zener would reduce clamping threshold by ~400 mV, potentially exposing downstream circuitry to overvoltage during transients.
Is the SOT-523 package compatible with standard 0201 pick-and-place equipment?
Yes - the SOT-523 package (1.6 mm × 0.8 mm) matches the footprint and tape-and-reel format (3000/reel, -7-F suffix) used by most Class II and III automated placement systems. Its 0.22 mm profile and matte tin finish ensure reliable vacuum nozzle pickup and solder paste release.
Does this Zener diode require a series resistor in all applications?
Yes - because it is a shunt regulator, a current-limiting resistor must always be placed in series with the cathode to control Zener current. For 4.7 V regulation from a 5.5 V source, a minimum 160 Ω resistor limits current to 5 mA; undersized resistors risk exceeding 150 mW dissipation and thermal failure.
BZX84C4V7T-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±6%
- Power - Max:
- 150 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 ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
BZX84C4V7T-7-F FAQ
1.How can I place an order for BZX84C4V7T-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C4V7T-7-F 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 BZX84C4V7T-7-F reliable?
The price and inventory of BZX84C4V7T-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C4V7T-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C4V7T-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C4V7T-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C4V7T-7-F?
BZX84C4V7T-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C4V7T-7-F 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 BZX84C4V7T-7-F?
For technical support, including BZX84C4V7T-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C4V7T-7-F requirements.
6.How does Aetrix verify that BZX84C4V7T-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C4V7T-7-F 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 BZX84C4V7T-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C4V7T-7-F?
All BZX84C4V7T-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C4V7T-7-F, 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 BZX84C4V7T-7-F part is unused and in its original packaging.
Return procedure for BZX84C4V7T-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C4V7T-7-F Tags
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Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZT52C15S-7-F
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