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onsemi SZBZX84C4V7ET1G
- Part No.:
- SZBZX84C4V7ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C4V7ET1G.pdf
- Description:
- DIODE ZENER 4.7V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:30,432
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Product details
Overview
SZBZX84C4V7ET1G from onsemi is a 4.7 V, 250 mW Zener diode in SOT-23 package, designed for precision voltage regulation and reference in space-constrained circuits. It delivers nominal Zener voltage of 4.7 V at 5 mA test current, with dynamic impedance of 80 Ω, ±3% tolerance, and −3.5 mV/°C temperature coefficient. It is used in overvoltage protection, power supply feedback loops, and voltage clamping in portable electronics.
For engineers reviewing the SZBZX84C4V7ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±3%), low dynamic impedance (80 Ω @ 5 mA), ESD robustness (>16 kV HBM), thermal resistance (500 °C/W on FR-5), and AEC-Q101 qualification for automotive use.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable voltage across its terminals. Its Zener voltage is specified at 4.4–5.0 V (min–max) under 5 mA test current, with leakage current ≤3.0 µA at 3.0 V reverse bias and forward voltage ≤0.90 V at 10 mA.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode), polarity band marking, and UL 94 V-0 flammability rating. It supports peak pulse power of 225 W (8 × 20 µs) and junction temperature range from −65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.4–5.0 V @ IZT = 5 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation | 250 mW on FR-5 board - maximum continuous DC power handling at 25 °C ambient |
| Zener Impedance (ZZT) | 80 Ω @ 5 mA - low dynamic resistance ensures stable regulation under varying load currents |
| Reverse Leakage Current | ≤3.0 µA @ VR = 3.0 V - minimal off-state current preserves efficiency in standby circuits |
| Temperature Coefficient | −3.5 mV/°C @ 5 mA - predictable voltage drift enables accurate thermal compensation in references |
| Capacitance | 260 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and transient response |
| ESD Rating | Class 3 (>16 kV) HBM - withstands electrostatic discharge during automated assembly and end-use |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case with corrosion-resistant finish; cathode indicated by polarity band; UL 94 V-0 rated; max soldering temperature 260 °C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Forward-biased terminal; connects to lower-potential node in regulation path |
| Pin 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad required |
| Pin 3 | Cathode | Reverse-biased terminal; connects to higher-potential node and serves as regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring reliability under thermal cycling and vibration |
| Pb-free & RoHS compliant | Meets global environmental regulations; compatible with lead-free reflow profiles without performance degradation |
| 225 W peak pulse rating | Withstands transient surge events (8 × 20 µs) in power rail protection without failure |
| Small SOT-23 footprint | Enables high-density layout on compact PCBs such as smartphone PMIC boards and wearable sensor modules |
| Low capacitance (260 pF) | Minimizes signal distortion in RF bias networks and fast-switching clamping applications |
Applications
| USB Power Delivery Clamp | Automotive Cabin Controller Reference |
|---|---|
Use Scenario: Clamping 5 V USB bus lines against ESD and load dump transients in portable accessories. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector between VBUS and GND. Use Value: 4.7 V breakdown threshold ensures safe clamping below USB 2.0 data line tolerance while maintaining low leakage (<3 µA) during normal operation. |
Use Scenario: Providing stable 4.7 V reference for ADC input scaling in HVAC control modules. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end conditioning. Use Value: −3.5 mV/°C tempco and 80 Ω ZZT enable <±1% reference stability across −40 °C to +125 °C operating range. |
| Smartphone Battery Charger Feedback | Industrial PLC Input Protection |
Use Scenario: Setting feedback voltage for buck converter ICs in single-cell Li-ion charger ICs. IC Role / Device Role / Timing Role: Voltage-setting element in optocoupler-isolated feedback loop. Use Value: Tight 4.4–5.0 V tolerance ensures ±3% output voltage accuracy without trimming resistors. |
Use Scenario: Protecting 24 V digital input channels from field-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Primary clamping device before TVS diode and series resistor. Use Value: 225 W peak pulse rating absorbs repetitive 1 kV/µs transients per IEC 61000-4-4, extending system MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C4V7ET1G | No AEC-Q101 qualification; same electrical specs and SOT-23 package | Not approved for automotive production; suitable for consumer-grade power supplies | Select when automotive qualification is not required and cost sensitivity is higher |
| MMSZ4704T1G | Same 4.7 V nominal Zener, but 300 mW rating and 100 Ω ZZT; SOD-123 package (larger footprint) | Higher power margin but incompatible pinout; requires PCB redesign | Choose only if >250 mW dissipation is needed and board space allows SOD-123 placement |
Compared with SZBZX84C4V7ET1G, BZX84C4V7ET1G offers identical regulation performance without automotive validation, while MMSZ4704T1G trades package compatibility for higher power handling-neither is pin-compatible, and both require design review for thermal and layout impact.
Availability
SZBZX84C4V7ET1G is available at Aetrix Electronics and suitable for automotive ECUs, portable power management, and industrial sensor interface circuits requiring stable component supply and long-term lifecycle support.
Supply support for SZBZX84C4V7ET1G 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications, with focus on reliability and sustainability.
SZBZX84C4V7ET1G belongs to the AEC-Q101-qualified BZX84CxxxET1G Zener regulator family, engineered for high-reliability voltage reference and protection in harsh-environment electronics.
FAQ
What is the Zener voltage tolerance of SZBZX84C4V7ET1G?
The SZBZX84C4V7ET1G has a Zener voltage range of 4.4 V to 5.0 V at 5 mA test current, corresponding to a ±3% tolerance around the nominal 4.7 V value. This tolerance is verified per onsemi's Electrical Characteristics table and applies under standard ambient conditions (TA = 25 °C). The SZBZX84C4V7ET1G maintains this specification across its qualified operating temperature range when derated per thermal resistance limits.
Is SZBZX84C4V7ET1G suitable for automotive applications?
Yes, SZBZX84C4V7ET1G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including body control modules, infotainment power rails, and ADAS sensor interfaces. Its qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD-key requirements for under-hood and cabin electronics. The SZBZX84C4V7ET1G also carries the "SZ" prefix denoting automotive-specific process controls and traceability.
What is the thermal resistance of SZBZX84C4V7ET1G on FR-5 board?
The thermal resistance from junction to ambient (RJA) for SZBZX84C4V7ET1G is 500 °C/W when mounted on an FR-5 board, with 250 mW total power dissipation rated at TA = 25 °C. Derating is required above 25 °C at 2.0 mW/°C. This RJA value directly determines maximum allowable power under elevated ambient temperatures and must be used in thermal calculations for reliable long-term operation of the SZBZX84C4V7ET1G.
Does SZBZX84C4V7ET1G have a connected Pin 2?
No, Pin 2 of the SZBZX84C4V7ET1G is internally unconnected (NC) and must remain electrically floating on the PCB. The official pinout-confirmed in the datasheet's Mechanical Characteristics section and Package Outline diagram (Style 8)-defines Pin 1 as Anode, Pin 2 as No Connection, and Pin 3 as Cathode. Routing or soldering to Pin 2 may compromise reliability or violate onsemi's mounting recommendations for the SZBZX84C4V7ET1G.
What is the maximum reverse leakage current for SZBZX84C4V7ET1G?
The maximum reverse leakage current for SZBZX84C4V7ET1G is 3.0 µA at VR = 3.0 V and TA = 25 °C, as specified in the Electrical Characteristics table. This parameter reflects off-state conduction before breakdown onset and is critical for low-power battery-operated designs. The SZBZX84C4V7ET1G maintains this leakage level across its storage temperature range (−65 °C to +150 °C), supporting ultra-low-quiescent-current applications.
SZBZX84C4V7ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZBZX84C4V7ET1G FAQ
1.How can I place an order for SZBZX84C4V7ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C4V7ET1G 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 SZBZX84C4V7ET1G reliable?
The price and inventory of SZBZX84C4V7ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C4V7ET1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C4V7ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C4V7ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C4V7ET1G?
SZBZX84C4V7ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C4V7ET1G 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 SZBZX84C4V7ET1G?
For technical support, including SZBZX84C4V7ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C4V7ET1G requirements.
6.How does Aetrix verify that SZBZX84C4V7ET1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C4V7ET1G 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 SZBZX84C4V7ET1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C4V7ET1G?
All SZBZX84C4V7ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C4V7ET1G, 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 SZBZX84C4V7ET1G part is unused and in its original packaging.
Return procedure for SZBZX84C4V7ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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