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onsemi SZBZX84C5V1ET3G
- Part No.:
- SZBZX84C5V1ET3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C5V1ET3G.pdf
- Description:
- DIODE ZENER 5.1V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:49,481
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Product details
Overview
SZBZX84C5V1ET3G from onsemi is a 5.1 V ±0.3 V Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C on FR-5 board, with 60 Ω dynamic impedance at 5 mA test current and 2.0 µA maximum reverse leakage at 3.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZBZX84C5V1ET3G datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.1 V nominal Zener voltage, ±2.7 mV/°C temperature coefficient, 225 pF capacitance at 0 V, AEC-Q101 qualification, and Pb-free SOT-23 footprint compatibility with automated assembly.
Technical Context
This device operates as a two-terminal voltage regulator using avalanche and Zener breakdown mechanisms, with specified Zener voltage measured under pulsed 5 mA test current (IZT1) to minimize self-heating error. Its thermal resistance of 500 °C/W on FR-5 board defines derating behavior above 25°C ambient.
The SOT-23 package features a cathode-indicated polarity band, void-free thermosetting plastic case rated UL 94 V-0, and supports reflow soldering up to 260°C for 10 seconds. Pin 2 is internally unconnected - a structural terminal with no electrical function.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.8 V to 5.4 V @ 5 mA - ensures stable regulation within ±6% tolerance across production units |
| Dynamic Impedance (ZZT) | 60 Ω @ 5 mA - limits output voltage variation under load transients in reference circuits |
| Reverse Leakage (IR) | 2.0 µA @ 3.0 V - enables low-quiescent-current bias networks without significant error contribution |
| Power Dissipation (PD) | 250 mW @ TA = 25°C on FR-5 - defines maximum continuous DC power before thermal derating begins |
| Capacitance (C) | 225 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent nodes |
| Temperature Coefficient | −2.7 mV/°C @ 5 mA - quantifies voltage drift over industrial temperature range (−65°C to +150°C) |
| ESD Rating | Class 3 (>16 kV HBM) - supports robust handling in manual assembly and field-replaceable modules |
Pinout & Package
SOT-23 (TO-236) surface-mount package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch, void-free thermosetting plastic case with corrosion-resistant finish and UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | DC current entry point during forward conduction; connected to lower-potential node in Zener regulation configuration |
| 2 | No Connection | Internally unconnected mechanical support terminal - must remain floating; no PCB trace or pad required |
| 3 | Cathode | DC current exit point during reverse breakdown; marked by polarity band; connects to regulated output node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and infotainment power rails |
| Pb-free and RoHS compliant | Meets EU Directive 2011/65/EU and JESD204B process requirements for green manufacturing |
| 225 W peak pulse rating | Withstands 8 × 20 µs surge events per IEC 61000-4-5 without degradation in ESD-prone interfaces |
| Optimized for automated assembly | Package geometry and surface finish ensure >99.8% placement yield on high-speed pick-and-place systems |
| Low capacitance (225 pF) | Minimizes loading effect on high-frequency clock lines and RF detector outputs |
Applications
| Portable Power Monitoring | USB-C Overvoltage Protection |
|---|---|
|
Use Scenario: Real-time battery voltage sensing in Bluetooth earbuds with 3.7 V Li-ion cells. IC Role / Device Role / Timing Role: Zener reference for ADC input scaling and low-threshold brown-out detection. Use Value: 5.1 V nominal voltage provides 1.4 V headroom above full-cell voltage, enabling accurate 12-bit ADC resolution without external op-amp buffering. |
Use Scenario: Clamp circuit on USB-C VBUS line to prevent damage from hot-plug transients. IC Role / Device Role / Timing Role: Fast-response shunt protector triggered at 5.1 V to divert surge energy before downstream PMIC damage. Use Value: 225 W peak pulse rating absorbs 8 × 20 µs surges exceeding IEC 61000-4-5 Level 4, eliminating need for TVS diode co-location. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module |
|
Use Scenario: Reference voltage generation for 4–20 mA loop transmitter in factory-floor pressure sensors. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable 5.1 V rail for DAC and op-amp biasing. Use Value: −2.7 mV/°C tempco ensures <±15 mV drift over −40°C to +85°C operating range, meeting ISO 13849 SIL-2 accuracy requirements. |
Use Scenario: Voltage supervisor for microcontroller reset logic in door module ECUs. IC Role / Device Role / Timing Role: Zener-based reset threshold detector monitoring 5 V supply rail stability. Use Value: AEC-Q101 qualification and 150°C junction rating guarantee reliable operation under hood temperatures up to 125°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C5V1ET3G | Non-automotive grade; lacks AEC-Q101 qualification and PPAP capability; identical electrical specs and SOT-23 footprint | Approved only for commercial-grade consumer electronics; not permitted in automotive BOMs | Select when cost sensitivity outweighs automotive compliance requirements and lifecycle assurance |
| MMSZ5231BT1G | Same 5.1 V nominal Zener voltage but higher 100 Ω ZZT @ 20 mA; 500 mW power rating on FR-4; different SOD-123 package | Requires PCB layout change due to larger 3.7 mm × 1.6 mm footprint and different thermal path | Choose for higher power margin in space-tolerant designs where thermal performance exceeds SOT-23 limits |
Compared with SZBZX84C5V1ET3G, BZX84C5V1ET3G offers identical regulation performance without automotive validation, while MMSZ5231BT1G trades smaller size for higher power handling and relaxed Zener impedance - making the former suitable for cost-driven commercial use and the latter for thermally constrained industrial applications requiring extended surge endurance.
Availability
SZBZX84C5V1ET3G is available at Aetrix Electronics and suitable for portable electronics, automotive body control modules, and industrial sensor signal conditioning requiring stable component supply with guaranteed long-term continuity.
Supply support for SZBZX84C5V1ET3G 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, medical, and IoT applications.
SZBZX84C5V1ET3G belongs to the BZX84CxxxETxG family of Zener regulators engineered for high-density surface-mount voltage reference and clamping in space-constrained, reliability-critical systems.
FAQ
What is the Zener voltage tolerance of SZBZX84C5V1ET3G?
The SZBZX84C5V1ET3G has a Zener voltage range of 4.8 V to 5.4 V at 5 mA test current, corresponding to a ±6% tolerance around the nominal 5.1 V value. This specification is verified per onsemi's Electrical Characteristics table on page 2 of the August 2024 Rev. 11 datasheet and applies under standard 25°C ambient conditions with pulsed current to avoid self-heating effects. The SZBZX84C5V1ET3G maintains this tolerance across its qualified production lot releases.
Is SZBZX84C5V1ET3G suitable for automotive applications?
Yes, SZBZX84C5V1ET3G is AEC-Q101 qualified and PPAP capable, explicitly designated for automotive and other applications requiring unique site and control change requirements. Its qualification covers temperature cycling, humidity testing, and mechanical shock per AEC standards, and it is rated for junction temperatures up to +150°C - making it appropriate for under-hood and cabin-mounted ECUs. The "SZ" prefix in SZBZX84C5V1ET3G confirms this automotive-grade status.
What is the thermal resistance of SZBZX84C5V1ET3G on FR-5 board?
The thermal resistance from junction to ambient (RJA) for SZBZX84C5V1ET3G is 500 °C/W when mounted on an FR-5 board, with power derating beginning above 25°C ambient at 2.0 mW/°C. This value is defined in the Maximum Ratings table on page 1 of the datasheet and directly determines safe operating area limits - for example, at 75°C ambient, maximum allowable continuous power drops to 150 mW. The SZBZX84C5V1ET3G's RJA is fixed by its SOT-23 package geometry and board material properties.
Does SZBZX84C5V1ET3G have a connected pin 2?
No, pin 2 of SZBZX84C5V1ET3G is internally unconnected - it serves only as a mechanical support terminal in the SOT-23 package and carries no electrical function. The official pinout (page 2, "Marking Diagram" section) specifies "1-Anode, 2-No Connection, 3-Cathode", and Style 8 mechanical outline confirms this configuration. PCB layouts must leave pin 2 floating; routing or grounding it may cause mechanical stress or solder joint reliability issues without functional benefit. This applies identically to all SZBZX84CxxxET3G devices.
What is the maximum reverse leakage current for SZBZX84C5V1ET3G?
The maximum reverse leakage current (IR) for SZBZX84C5V1ET3G is 2.0 µA at VR = 3.0 V and TA = 25°C, as specified in the Electrical Characteristics table on page 2. This parameter is critical for low-power bias networks and ensures minimal current draw in standby modes. The SZBZX84C5V1ET3G maintains this leakage limit across its full storage temperature range (−65°C to +150°C), with typical values dropping further at lower temperatures.
SZBZX84C5V1ET3G 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):
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZBZX84C5V1ET3G FAQ
1.How can I place an order for SZBZX84C5V1ET3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C5V1ET3G 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 SZBZX84C5V1ET3G reliable?
The price and inventory of SZBZX84C5V1ET3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C5V1ET3G is usually 5 days.
3.What payment methods are accepted for SZBZX84C5V1ET3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C5V1ET3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C5V1ET3G?
SZBZX84C5V1ET3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C5V1ET3G 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 SZBZX84C5V1ET3G?
For technical support, including SZBZX84C5V1ET3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C5V1ET3G requirements.
6.How does Aetrix verify that SZBZX84C5V1ET3G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C5V1ET3G 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 SZBZX84C5V1ET3G meets industry standards.
7.What is the process for return or replacement of SZBZX84C5V1ET3G?
All SZBZX84C5V1ET3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C5V1ET3G, 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 SZBZX84C5V1ET3G part is unused and in its original packaging.
Return procedure for SZBZX84C5V1ET3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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