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onsemi BZX84C5V1ET1G
- Part No.:
- BZX84C5V1ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C5V1ET1G.pdf
- Description:
- DIODE ZENER 5.1V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:9,879
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Product details
Overview
BZX84C5V1ET1G from onsemi is a 5.1 V, 250 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and reference in space-constrained circuits. It delivers ±3% nominal Zener voltage tolerance at 5 mA test current, 60 Ω dynamic impedance, and −2.7 mV/°C temperature coefficient - enabling stable biasing in portable power management and signal conditioning applications.
For engineers reviewing the BZX84C5V1ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.1 V regulation accuracy, low leakage (2.0 µA @ 3.0 V), ESD robustness (>16 kV HBM), and compatibility with high-density PCB assembly processes.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage across its cathode-anode terminals. Its design targets low-power voltage clamping and shunt regulation in DC rails under 100 mA, with thermal resistance of 500 °C/W on FR-5 board and junction temperature range from −65 °C to +150 °C.
The device features a no-connection terminal (Pin 2), confirming its two-terminal function despite the three-pin SOT-23 footprint. Its capacitance is 225 pF at 0 V bias and 1 MHz, and forward voltage is ≤0.90 V at 10 mA - supporting bidirectional use where low forward drop is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.8–5.4 V @ 5 mA - ensures tight 5.1 V regulation for ±3% reference stability in feedback loops |
| Power Dissipation | 250 mW on FR-5 board - supports continuous operation in low-power sensor interfaces and microcontroller reset circuits |
| Zener Impedance (ZZT) | 60 Ω @ 5 mA - minimizes output voltage variation under load transients in voltage reference designs |
| Reverse Leakage Current | 2.0 µA @ 3.0 V - enables low-quiescent-current operation in battery-powered systems |
| Temperature Coefficient | −2.7 mV/°C @ 5 mA - provides predictable drift compensation in ambient-temperature-varying environments |
| Capacitance | 225 pF @ 0 V, 1 MHz - defines high-frequency noise filtering capability in RF bias networks |
| ESD Rating | Class 3 (>16 kV HBM) - ensures robustness against handling and system-level electrostatic discharge events |
Pinout & Package
SOT-23 (TO-236) plastic surface-mount package, 2.90 × 1.30 × 1.00 mm, Pb-free and RoHS compliant. Cathode indicated by polarity band; Pin 2 is internally unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry / reverse breakdown cathode reference point for shunt regulator configuration |
| 2 | No Connection | Internally isolated; no electrical function - accommodates standard SOT-23 pick-and-place tooling without circuit impact |
| 3 | Cathode | Reference node for regulated voltage output; connected to higher-potential rail in shunt regulation |
Key Features
| Feature | Design Value |
|---|---|
| 250 mW Power Rating | Enables reliable voltage clamping in 3.3 V and 5 V logic supply rails without external heat sinking |
| Low Dynamic Impedance | 60 Ω at 5 mA ensures <15 mV output shift under ±1 mA load variation - critical for ADC reference stability |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements for consumer, industrial, and automotive electronics |
| High ESD Robustness | Class 3 (>16 kV HBM) eliminates need for additional ESD protection in handheld device front-end circuits |
| Optimized for Automated Assembly | SOT-23 footprint and marking support high-speed placement and AOI inspection in volume manufacturing |
Applications
| Microcontroller Reset Circuit | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Providing clean, temperature-stable reset threshold for ARM Cortex-M0+ microcontrollers in battery-operated IoT sensors. IC Role / Device Role / Timing Role: Shunt Zener reference generating precise 5.1 V trigger point for reset supervisor ICs. Use Value: −2.7 mV/°C TC and 60 Ω ZZT ensure reset voltage stays within ±2% over −40 °C to +85 °C operating range. |
Use Scenario: Protecting USB 2.0 data lines and VBUS from transient overvoltage during hot-plug or ESD events. IC Role / Device Role / Timing Role: Low-capacitance (225 pF) clamping diode shunting excess energy to ground before IC damage occurs. Use Value: 225 pF capacitance and >16 kV HBM rating allow direct placement at connector without signal integrity degradation. |
| Portable Audio Bias Network | Industrial Sensor Signal Conditioning |
Use Scenario: Generating stable 5.1 V bias for electret microphone preamplifiers in Bluetooth headsets. IC Role / Device Role / Timing Role: Low-leakage (2.0 µA @ 3.0 V) voltage reference establishing DC operating point for JFET input stages. Use Value: Sub-µA leakage preserves battery life in always-on audio monitoring modes while maintaining 4.8–5.4 V regulation accuracy. |
Use Scenario: Providing excitation voltage for 350 Ω strain gauge bridges in factory-floor load cells. IC Role / Device Role / Timing Role: Precision shunt regulator delivering stable 5.1 V bridge supply independent of 12 V rail fluctuations. Use Value: 60 Ω ZZT limits bridge voltage drift to <0.06% per 1 mA bridge current change - improving measurement resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5231BT1G | 5.1 V, 500 mW, SOD-123 package, 17 Ω ZZT @ 20 mA - higher power but larger footprint and lower impedance | Preferred where higher surge immunity (225 W peak) and tighter regulation under heavy load are needed | Select when board space allows SOD-123 and load currents exceed 15 mA average |
| BZX84-C5V1,115 | 5.1 V, 250 mW, SOT-23, 60 Ω ZZT @ 5 mA - identical electrical specs but Nexperia marking and different tape/reel packaging | Drop-in replacement for legacy BOMs requiring Nexperia-sourced components with same qualification level | Choose for dual-sourcing strategy where onsemi and Nexperia supply chain diversification is mandated |
Compared with BZX84C5V1ET1G, MMSZ5231BT1G offers superior power handling and lower impedance but requires layout revision; BZX84-C5V1,115 provides identical regulation performance with alternate logistics - making it ideal for second-source procurement without design change.
Availability
BZX84C5V1ET1G is available at Aetrix Electronics and suitable for portable electronics, industrial sensor interfaces, and USB-compliant peripheral designs requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for BZX84C5V1ET1G 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 management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The BZX84C5V1ET1G belongs to the BZX84CxxxET1G Zener regulator family, engineered for high-density surface-mount voltage reference and clamping in battery-powered and space-constrained electronic systems.
FAQ
What is the maximum reverse leakage current for BZX84C5V1ET1G at 3.0 V?
The BZX84C5V1ET1G exhibits a maximum reverse leakage current of 2.0 µA at VR = 3.0 V, as specified in the Electrical Characteristics table on page 2 of the onsemi datasheet. This low leakage supports extended battery life in always-on applications and ensures minimal error contribution in precision reference circuits where BZX84C5V1ET1G is used.
Is BZX84C5V1ET1G compatible with lead-free reflow soldering processes?
Yes, BZX84C5V1ET1G is Pb-free and RoHS compliant, rated for maximum soldering temperature of 260 °C for 10 seconds - fully compatible with standard lead-free reflow profiles (e.g., JEDEC J-STD-020). The thermosetting plastic case and corrosion-resistant finish ensure reliability during repeated thermal cycling, making BZX84C5V1ET1G suitable for high-volume automated assembly.
Does BZX84C5V1ET1G have a functional third pin?
No, Pin 2 of BZX84C5V1ET1G is internally unconnected (NC), as confirmed in the datasheet's marking diagram and mechanical outline (Style 8). The SOT-23 package uses this pin solely for mechanical stability and pick-and-place compatibility; only Pins 1 (Anode) and 3 (Cathode) perform electrical functions in BZX84C5V1ET1G's Zener operation.
What is the Zener impedance of BZX84C5V1ET1G at 1 mA test current?
At IZT = 1 mA, the BZX84C5V1ET1G has a Zener impedance (ZZT) of 480 Ω, as listed in the Electrical Characteristics table. This higher impedance compared to its 60 Ω value at 5 mA reflects typical Zener behavior - designers should select operating current based on required regulation stiffness, with BZX84C5V1ET1G optimized for 5 mA nominal use.
Can BZX84C5V1ET1G be used in automotive applications?
The standard BZX84C5V1ET1G is not AEC-Q101 qualified; however, the SZBZX84C5V1ET1G variant - with identical electrical specs and SOT-23 package - is automotive-grade, PPAP-capable, and AEC-Q101 qualified. For automotive designs requiring qualification, specify SZBZX84C5V1ET1G instead of BZX84C5V1ET1G to ensure compliance and supply chain traceability.
BZX84C5V1ET1G 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):
- 5.1 V
- Tolerance:
- ±6%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 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)
BZX84C5V1ET1G FAQ
1.How can I place an order for BZX84C5V1ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C5V1ET1G 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 BZX84C5V1ET1G reliable?
The price and inventory of BZX84C5V1ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C5V1ET1G is usually 5 days.
3.What payment methods are accepted for BZX84C5V1ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C5V1ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C5V1ET1G?
BZX84C5V1ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C5V1ET1G 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 BZX84C5V1ET1G?
For technical support, including BZX84C5V1ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C5V1ET1G requirements.
6.How does Aetrix verify that BZX84C5V1ET1G is sourced from the original manufacturer or authorized distributors?
All BZX84C5V1ET1G 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 BZX84C5V1ET1G meets industry standards.
7.What is the process for return or replacement of BZX84C5V1ET1G?
All BZX84C5V1ET1G units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C5V1ET1G, 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 BZX84C5V1ET1G part is unused and in its original packaging.
Return procedure for BZX84C5V1ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C5V1ET1G Tags
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MM5Z5V1ST1G
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