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onsemi BZX84C4V7ET1G
- Part No.:
- BZX84C4V7ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C4V7ET1G.pdf
- Description:
- DIODE ZENER 4.7V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,425
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Product details
Overview
BZX84C4V7ET1G from onsemi is a 4.7 V, 250 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and reference applications at low current levels (IZT = 5 mA). It delivers nominal Zener voltage of 4.7 V with ±0.3 V tolerance, dynamic impedance of 80 Ω at 5 mA, and reverse leakage current ≤3.0 µA at VR = 1 V - suitable for power supply feedback, overvoltage protection, and voltage clamping in portable electronics.
For engineers reviewing the BZX84C4V7ET1G datasheet, pinout, applications, or equivalent options, key selection considerations include its 4.7 V nominal Zener voltage, 80 Ω impedance at 5 mA, −3.5 mV/°C temperature coefficient, 260 pF capacitance at 0 V, and SOT-23 pinout with cathode-marked terminal configuration.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable voltage across its terminals under specified current conditions. Its Zener voltage is characterized at IZT = 5 mA (4.4–5.0 V), with secondary test points at 1 mA (3.7–4.7 V) and 20 mA (4.5–5.4 V), enabling design flexibility across load-current ranges.
Thermal performance is defined by RJA = 500 °C/W on FR-5 board and 417 °C/W on alumina substrate, supporting operation from −65 °C to +150 °C junction temperature. ESD robustness exceeds 16 kV (HBM Class 3), and peak pulse power withstands 225 W (8 × 20 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal (4.4–5.0 V min/max @ 5 mA); sets precise clamping/reference level in feedback or protection circuits |
| Power Dissipation | 250 mW on FR-5 board; defines maximum continuous DC power handling without derating |
| Zener Impedance (ZZT) | 80 Ω @ 5 mA; determines output voltage stability under varying load current |
| Reverse Leakage (IR) | ≤3.0 µA @ VR = 1 V; ensures minimal quiescent current in standby or high-impedance bias networks |
| Capacitance (C) | 260 pF @ VR = 0 V, f = 1 MHz; impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| Temp. Coefficient (αVZ) | −3.5 mV/°C @ 5 mA; enables predictable voltage drift compensation in temperature-sensitive references |
| ESD Rating | HBM Class 3 (>16 kV); supports robust handling during automated assembly and end-use in consumer portables |
Pinout & Package
SOT-23 (TO-236) plastic surface-mount package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; polarity band indicates cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; forward-biased when VANODE > VCATHODE by ≥0.9 V |
| 2 | No Connection | Internally unconnected; electrically isolated and must not be soldered to PCB traces |
| 3 | Cathode | Marked by polarity band; connected to higher-potential node during Zener operation; carries regulated output current |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements for industrial and consumer electronics manufacturing |
| Optimized SMT Assembly | Package geometry and finish support reliable pick-and-place and reflow soldering on high-density PCBs |
| High ESD Robustness | Class 3 HBM rating (>16 kV) reduces risk of field failure in handheld and battery-powered devices |
| Stable Low-Voltage Reference | 4.7 V Zener with tight 0.3 V tolerance and −3.5 mV/°C TC enables accurate analog sensing and regulation |
| Low Capacitance Clamping | 260 pF capacitance minimizes signal distortion in data line protection and I/O interface applications |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
|
Use Scenario: Regulating output voltage in low-power linear regulators or switching converter feedback loops. IC Role / Device Role / Timing Role: Zener reference element providing stable 4.7 V threshold for error amplifier comparison. Use Value: Enables ±2% output regulation accuracy with minimal external components and no active circuitry. |
Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes on sensor or communication lines. IC Role / Device Role / Timing Role: Clamping diode shunting excess energy above 4.7 V to ground before damage occurs. Use Value: Limits voltage excursion to safe levels while maintaining <3.0 µA leakage in normal operation. |
| Portable Device Biasing | Reference Voltage Generation |
|
Use Scenario: Providing stable bias voltage for analog front-end circuits in Bluetooth headsets or wearables. IC Role / Device Role / Timing Role: Passive voltage reference source for op-amp input stages or ADC reference dividers. Use Value: Delivers 4.7 V with −3.5 mV/°C drift, reducing calibration burden in compact thermal environments. |
Use Scenario: Generating precision reference for comparators or voltage monitors in battery management systems. IC Role / Device Role / Timing Role: Two-terminal Zener regulator establishing fixed 4.7 V reference independent of supply variation. Use Value: Achieves 80 Ω dynamic impedance at 5 mA, ensuring <10 mV output shift under 0.8 mA load change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5225BLT1 | 4.7 V nominal, 350 mW rating, 100 Ω ZZT @ 20 mA, SOT-23 package | Higher power rating but higher impedance; less stable regulation at low currents | Prefer BZX84C4V7ET1G where low-current (<5 mA) stability and tighter ZZT are critical |
| BZX84-C4V7,115 | 4.7 V nominal, 250 mW, 80 Ω ZZT @ 5 mA, same SOT-23 pinout, Nexperia | Identical electrical specs and footprint; RoHS-compliant, AEC-Q200 qualified variant available | Drop-in alternative with identical performance; select based on supply chain availability and qualification needs |
Compared with MMBZ5225BLT1, BZX84C4V7ET1G offers superior low-current regulation stability (80 Ω vs. 100 Ω) and tighter voltage tolerance (±0.3 V vs. ±0.5 V); versus BZX84-C4V7,115, it shares identical core parameters but differs in manufacturer-specific process control and automotive qualification status.
Availability
BZX84C4V7ET1G is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and portable device biasing requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for BZX84C4V7ET1G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX84C4V7ET1G belongs to the BZX84CxxxET1G Zener regulator family, engineered for space-constrained, high-reliability voltage reference and clamping in portable and high-density electronics.
FAQ
What is the nominal Zener voltage and tolerance of the BZX84C4V7ET1G?
The BZX84C4V7ET1G has a nominal Zener voltage of 4.7 V with a minimum of 4.4 V and maximum of 5.0 V at test current IZT = 5 mA. This ±0.3 V tolerance ensures predictable clamping behavior in precision reference and protection circuits where tight voltage control is required.
What is the Zener impedance of the BZX84C4V7ET1G and why does it matter?
The BZX84C4V7ET1G exhibits a maximum Zener impedance (ZZT) of 80 Ω at IZT = 5 mA. This value directly affects voltage regulation stability: lower impedance means smaller output voltage variation under changing load current, making BZX84C4V7ET1G suitable for applications demanding high reference accuracy.
How is the BZX84C4V7ET1G packaged and what are its mounting characteristics?
The BZX84C4V7ET1G uses the SOT-23 (TO-236) surface-mount package measuring 2.90 × 1.30 × 1.00 mm, with pin 1 as anode, pin 2 unconnected, and pin 3 as cathode (marked by polarity band). Its thermosetting plastic case supports reflow soldering up to 260 °C for 10 seconds and is optimized for automated board assembly.
What is the temperature coefficient of the BZX84C4V7ET1G and how does it affect performance?
The BZX84C4V7ET1G has a temperature coefficient of −3.5 mV/°C at IZT = 5 mA. This negative coefficient means its Zener voltage decreases slightly as temperature rises, which must be accounted for in wide-temperature-range designs - for example, a 50 °C rise causes ~175 mV drop in regulated voltage.
Is the BZX84C4V7ET1G suitable for ESD protection applications?
Yes - the BZX84C4V7ET1G is rated for Class 3 HBM ESD robustness (>16 kV), making it appropriate for I/O line clamping in handheld devices. However, its 225 W peak pulse rating (8 × 20 µs) is intended for transient suppression, not sustained surge events; pairing with TVS diodes is recommended for high-energy threats.
BZX84C4V7ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±6%
- Power - Max:
- 225 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
BZX84C4V7ET1G FAQ
1.How can I place an order for BZX84C4V7ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C4V7ET1G 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 BZX84C4V7ET1G reliable?
The price and inventory of BZX84C4V7ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C4V7ET1G is usually 5 days.
3.What payment methods are accepted for BZX84C4V7ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C4V7ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C4V7ET1G?
BZX84C4V7ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C4V7ET1G 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 BZX84C4V7ET1G?
For technical support, including BZX84C4V7ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C4V7ET1G requirements.
6.How does Aetrix verify that BZX84C4V7ET1G is sourced from the original manufacturer or authorized distributors?
All BZX84C4V7ET1G 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 BZX84C4V7ET1G meets industry standards.
7.What is the process for return or replacement of BZX84C4V7ET1G?
All BZX84C4V7ET1G units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C4V7ET1G, 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 BZX84C4V7ET1G part is unused and in its original packaging.
Return procedure for BZX84C4V7ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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