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onsemi BZX84C5V1ET3G
- Part No.:
- BZX84C5V1ET3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C5V1ET3G.pdf
- Description:
- DIODE ZENER 5.1V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:7,418
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Product details
Overview
BZX84C5V1ET3G 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 BZX84C5V1ET3G datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, thermal derating data, SOT-23 terminal mapping, real-world use cases, and validated alternative parts for voltage reference design and overvoltage protection.
Technical Context
This device operates as a two-terminal shunt regulator with cathode-anode polarity, requiring external series resistance to limit reverse current. Its Zener breakdown is specified at IZT = 5 mA (VZ = 4.8–5.4 V), with low leakage (IR ≤ 2.0 µA at VR = 2.0 V) and tight thermal stability (TC = −2.7 mV/°C).
Designed for FR-5 board mounting, it supports 250 mW continuous dissipation at 25°C, derating linearly above that temperature (2.0 mW/°C), and withstands 225 W non-repetitive peak pulses (8 × 20 µs). The SOT-23 package features a no-connection pin (Pin 2), confirmed in onsemi's mechanical outline Style 8.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.8–5.4 V @ IZT = 5 mA - defines regulated output range under standard test conditions |
| Power Dissipation (PD) | 250 mW on FR-5 board @ TA = 25°C - sets maximum steady-state thermal load without heatsinking |
| Zener Impedance (ZZT) | 60 Ω @ IZT = 5 mA - determines regulation accuracy under varying load current |
| Reverse Leakage (IR) | ≤2.0 µA @ VR = 2.0 V - ensures minimal quiescent current in standby or low-power modes |
| Temperature Coefficient | −2.7 mV/°C @ IZT = 5 mA - quantifies voltage drift across operating temperature range |
| Capacitance (C) | 225 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and transient response |
| ESD Rating | Class 3 (>16 kV) HBM - enables robust handling in automated assembly and end-use environments |
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; cathode indicated by band; UL 94 V-0 flammability rating; max solder temperature 260°C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation |
| 2 | No Connection | Internally unconnected; must remain floating - not tied to ground or supply |
| 3 | Cathode | Connected to higher-potential node; defines regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free & RoHS Compliant | Meets environmental compliance requirements for global electronics manufacturing and disposal |
| Automated Assembly Optimized | Package geometry and marking support high-yield pick-and-place and reflow processes |
| High ESD Robustness | Class 3 Human Body Model rating (>16 kV) reduces risk of field failure in handheld devices |
| Low Capacitance | 225 pF enables use in RF bias networks and fast-switching protection circuits without signal distortion |
| Stable Low-Voltage Reference | −2.7 mV/°C TC and tight 4.8–5.4 V tolerance support accurate analog sensing and ADC reference scaling |
Applications
| Portable Power Monitoring | USB Interface Protection |
|---|---|
|
Use Scenario: Monitoring battery voltage in Bluetooth earbuds using a microcontroller ADC with internal 1.1 V reference. IC Role / Device Role / Timing Role: Provides stable 5.1 V Zener reference for resistor-divider scaling of 3.0–4.2 V battery rail into ADC input range. Use Value: Enables ±1.5% battery SOC estimation accuracy over −20°C to +70°C due to low TC and tight VZ tolerance. |
Use Scenario: Clamping D+ and D− lines against ESD transients in USB 2.0 peripheral designs. IC Role / Device Role / Timing Role: Acts as bidirectional shunt protector, clamping voltage spikes to ≤5.4 V before they reach USB PHY IC inputs. Use Value: Survives >16 kV HBM ESD events while adding only 225 pF capacitance - preserving signal integrity up to 480 Mbps. |
| Industrial Sensor Signal Conditioning | Programmable Logic Supply Clamp |
|
Use Scenario: Biasing a 4–20 mA current-loop transmitter's op-amp stage in factory automation sensors. IC Role / Device Role / Timing Role: Supplies stable 5.1 V reference for DAC output scaling and current-sense amplifier offset trimming. Use Value: Maintains <±0.5% full-scale error over temperature due to matched TC and low ZZT in feedback path. |
Use Scenario: Protecting FPGA configuration I/O banks powered from 3.3 V LDOs against overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Shunts excess voltage above 5.4 V to ground, preventing latch-up or gate oxide damage in I/O cells. Use Value: Limits clamp energy to <10 mJ per event (225 W × 20 µs), avoiding thermal runaway in dense BGA layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5231BS-7-F (Diodes Inc.) | 5.1 V nominal, 200 mW rating, 30 Ω ZZT, SOT-23 package, −2.5 mV/°C TC | Lower power rating and tighter ZZT; suitable where lower dissipation and improved regulation linearity are prioritized | Select when board-level thermal margin is limited and tighter dynamic impedance is required for precision references. |
| BZX84-C5V1 (Nexperia) | 5.1 V nominal, 250 mW rating, 60 Ω ZZT, SOT-23 package, −2.5 mV/°C TC, AEC-Q200 qualified | Identical electrical specs but automotive-qualified; higher screening cost and longer lead time | Choose for automotive infotainment or ADAS modules requiring AEC-Q200 compliance and extended temperature validation. |
Compared with BZX84C5V1ET3G, MMBZ5231BS-7-F offers lower ZZT at reduced power handling, while BZX84-C5V1 matches all key parameters but adds automotive qualification - making it suitable for harsh-environment deployments where reliability certification is mandatory.
Availability
BZX84C5V1ET3G is available at Aetrix Electronics and suitable for portable power monitoring, USB interface protection, industrial sensor signal conditioning, and programmable logic supply clamp applications requiring stable component supply, consistent parametric performance, and long-term lifecycle continuity.
Supply support for BZX84C5V1ET3G 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, and sensor solutions for automotive, industrial, and consumer markets.
The BZX84C5V1ET3G belongs to onsemi's BZX84CxxxETxG Zener regulator family, engineered for high-density PCBs in battery-powered and ESD-sensitive systems where small size, low leakage, and predictable TC are critical.
FAQ
What is the maximum continuous power dissipation for BZX84C5V1ET3G on an FR-5 board?
BZX84C5V1ET3G has a maximum continuous power dissipation of 250 mW at ambient temperature (TA) = 25°C on FR-5 board. Above 25°C, it derates linearly at 2.0 mW/°C - meaning at 75°C ambient, usable power drops to 150 mW. This rating assumes no forced airflow or heatsinking and aligns with JEDEC JESD51-2 thermal test conditions.
Does BZX84C5V1ET3G have a functional Pin 2, and what happens if it's connected?
No, Pin 2 of BZX84C5V1ET3G is internally unconnected (NC) per onsemi's Style 8 mechanical specification. Connecting Pin 2 to ground, supply, or any other node introduces no electrical benefit and risks compromising solder joint integrity or causing unintended parasitic coupling. It must remain electrically floating in layout and assembly.
How does the temperature coefficient of BZX84C5V1ET3G affect its regulation accuracy over −40°C to +125°C?
BZX84C5V1ET3G has a temperature coefficient of −2.7 mV/°C at IZT = 5 mA. Over a 165°C span (−40°C to +125°C), this yields ~445 mV total drift - resulting in a VZ shift from ~5.55 V at −40°C to ~4.65 V at +125°C. For applications requiring tighter stability, external compensation or selection of higher-VZ parts with near-zero TC is recommended.
Can BZX84C5V1ET3G be used as a substitute for a 5 V logic-level clamp in 3.3 V I/O circuits?
Yes, BZX84C5V1ET3G is commonly used for 3.3 V I/O clamping: its 5.1 V nominal Zener voltage ensures reliable conduction only during overvoltage events (e.g., ESD or bus contention), while its 225 pF capacitance minimally loads the signal line. However, ensure series current-limiting resistance is sized to keep peak clamp current below 225 W pulse limits and avoid thermal stress.
Is BZX84C5V1ET3G compliant with automotive AEC-Q101 standards?
No, BZX84C5V1ET3G is not AEC-Q101 qualified. It belongs to the standard BZX84CxxxETxG series. For automotive applications, onsemi offers the SZBZX84C5V1ET3G variant (with "SZ" prefix), which is AEC-Q101 qualified, PPAP-capable, and manufactured under automotive-specific process controls - confirmed in the same datasheet's ordering information table.
BZX84C5V1ET3G 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)
BZX84C5V1ET3G FAQ
1.How can I place an order for BZX84C5V1ET3G through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C5V1ET3G 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 BZX84C5V1ET3G reliable?
The price and inventory of BZX84C5V1ET3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C5V1ET3G is usually 5 days.
3.What payment methods are accepted for BZX84C5V1ET3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C5V1ET3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C5V1ET3G?
BZX84C5V1ET3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C5V1ET3G 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 BZX84C5V1ET3G?
For technical support, including BZX84C5V1ET3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C5V1ET3G requirements.
6.How does Aetrix verify that BZX84C5V1ET3G is sourced from the original manufacturer or authorized distributors?
All BZX84C5V1ET3G 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 BZX84C5V1ET3G meets industry standards.
7.What is the process for return or replacement of BZX84C5V1ET3G?
All BZX84C5V1ET3G units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C5V1ET3G, 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 BZX84C5V1ET3G part is unused and in its original packaging.
Return procedure for BZX84C5V1ET3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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