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onsemi BZX84B5V1LT1
- Part No.:
- BZX84B5V1LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B5V1LT1.pdf
- Description:
- DIODE ZENER 5.1V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,210
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Product details
Overview
BZX84B5V1LT1 from onsemi is a 5.1 V ±2% tolerance Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board at 25°C, with 60 Ω dynamic impedance at 5 mA test current and −2.7 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the BZX84B5V1LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include tight 2% Zener voltage tolerance, low 60 Ω Zener impedance at 5 mA, ESD rating >16 kV (HBM), SOT-23 footprint compatibility, and −2.7 mV/°C temperature coefficient for stable regulation across industrial temperature range.
Technical Context
This device belongs to the BZX84BxxxLT1G tight-tolerance Zener series, designed for stable voltage clamping and reference generation in space-constrained DC power domains. It operates with reverse-biased Zener breakdown at nominal 5.1 V, specified under pulsed 5 mA test current (IZT) at 25°C ambient.
The SOT-23 package supports automated assembly and delivers thermal resistance of 500°C/W (junction-to-ambient on FR-5), enabling reliable operation up to +150°C junction temperature. Its 225 pF capacitance at 0 V bias and 1 MHz makes it suitable for low-frequency regulation, not RF bypassing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 5.00–5.20 V @ 5 mA - ensures ±2% regulation accuracy for 5 V rail monitoring and feedback loops |
| Zener Impedance | 60 Ω max @ 5 mA - maintains low output impedance for stable reference under varying load conditions |
| Power Dissipation | 250 mW on FR-5 board @ 25°C - defines maximum continuous clamping energy without thermal runaway |
| Temperature Coefficient | −2.7 mV/°C @ 5 mA - enables predictable voltage drift compensation in temperature-varying environments |
| Reverse Leakage | 2 µA max @ 2 V - guarantees minimal quiescent current draw in standby or low-power modes |
| Capacitance | 225 pF @ 0 V, 1 MHz - sets upper limit for high-frequency noise filtering capability |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during PCB assembly and end-user operation |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band; Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential side of regulated node; forward conduction path when biased positively |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad should tie to this terminal |
| 3 | Cathode | Connected to higher-potential side (e.g., VIN or supply rail); Zener breakdown occurs between Cathode and Anode |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±2% (5.00–5.20 V) - reduces need for post-regulation trimming in precision analog circuits |
| Low dynamic impedance | 60 Ω max @ 5 mA - minimizes output voltage variation under load transients in feedback networks |
| High ESD robustness | Class 3 (>16 kV HBM) - eliminates need for external ESD protection in handheld and portable designs |
| Thermal stability | −2.7 mV/°C tempco - allows accurate voltage reference operation from −65°C to +150°C junction range |
| Automated assembly support | SOT-23 package with optimized solderability - compatible with standard reflow profiles and pick-and-place equipment |
Applications
| USB Power Monitoring | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Monitoring 5 V USB supply voltage to detect brown-out conditions before system reset. IC Role / Device Role / Timing Role: Zener reference element in comparator-based undervoltage detection circuit. Use Value: Tight 5.1 V ±2% tolerance ensures consistent trip point across units and temperatures, reducing false resets. |
Use Scenario: Generating clean, temperature-stable reset signal for ARM Cortex-M microcontrollers during power-up. IC Role / Device Role / Timing Role: Precision voltage threshold device in RC-delayed reset generator. Use Value: Low 60 Ω Zener impedance prevents voltage sag under capacitor charging load, ensuring accurate timing. |
| Portable Battery Protection | Industrial Sensor Signal Conditioning |
Use Scenario: Clamping Li-ion battery pack voltage to prevent overcharge in multi-cell charger ICs. IC Role / Device Role / Timing Role: Overvoltage clamp placed across cell stack or charge controller feedback node. Use Value: 250 mW power rating sustains transient overvoltage events without degradation; Class 3 ESD withstands field handling. |
Use Scenario: Providing stable 5.1 V reference for 12-bit ADC in industrial temperature sensor modules. IC Role / Device Role / Timing Role: Primary voltage reference source for ratiometric measurement circuits. Use Value: −2.7 mV/°C tempco aligns closely with typical sensor offset drift, improving overall system accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C5V1LT1G | Standard 5% tolerance (4.8–5.4 V), same SOT-23 package and 60 Ω ZZT | Acceptable where ±5% regulation accuracy suffices; lower cost but higher unit-to-unit variation | Select when budget constraints outweigh precision requirements and design margins accommodate wider VZ spread |
| MMSZ5231B-TP | 5.1 V ±5%, 500 mW rating, SOD-123 package (3.7 × 1.6 mm) | Higher power handling but larger footprint; unsuitable for ultra-high-density layouts | Choose when thermal margin is critical and PCB area permits larger package; not drop-in compatible |
Compared with BZX84C5V1LT1G and MMSZ5231B-TP, the BZX84B5V1LT1 offers superior voltage accuracy (±2% vs. ±5%) in the smallest form factor, making it optimal for space-limited, precision-regulated systems where consistency across production batches is essential.
Availability
BZX84B5V1LT1 is available at Aetrix Electronics and suitable for USB power monitoring, microcontroller reset circuits, portable battery protection, and industrial sensor signal conditioning requiring stable component supply and long-term sourcing continuity.
Supply support for BZX84B5V1LT1 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, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX84BxxxLT1G series was developed to deliver high-precision, low-profile Zener regulation for compact portable electronics and high-density PCBs - emphasizing tight tolerance, robust ESD performance, and automated manufacturability.
FAQ
What is the exact Zener voltage tolerance of BZX84B5V1LT1?
The BZX84B5V1LT1 has a guaranteed Zener voltage range of 5.00 V to 5.20 V at 5 mA test current and 25°C ambient, corresponding to ±2% tolerance about the nominal 5.1 V value. This tight specification is confirmed in the "BZX84BxxxL (Tight Tolerance Series)" table on page 4 of the official onsemi datasheet for BZX84B5V1LT1.
Does BZX84B5V1LT1 have a connection on pin 2?
No, pin 2 of the BZX84B5V1LT1 is internally unconnected (NC). The device uses only pins 1 (Anode) and 3 (Cathode) for electrical operation. This is explicitly stated in the "Pinout: 1-Anode, 2-No Connection, 3-Cathode" note on pages 2 and 4 of the onsemi datasheet, and verified in the mechanical outline (Style 8) on page 6.
What is the maximum power dissipation of BZX84B5V1LT1 on FR-5 board?
The BZX84B5V1LT1 is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient temperature, with derating of 2.0 mW/°C above that temperature. This value is listed in the "MAXIMUM RATINGS" table on page 2 of the onsemi datasheet and applies directly to the BZX84BxxxLT1G series including BZX84B5V1LT1.
Is BZX84B5V1LT1 RoHS compliant and lead-free?
Yes, BZX84B5V1LT1 is Pb-free and RoHS compliant, as confirmed by the "(Pb−Free)" designation in the ordering information table (page 2), the "These Devices are Pb−Free and are RoHS Compliant" feature bullet (page 1), and the "G" suffix in the full part number BZX84B5V1LT1G referenced throughout the datasheet.
What is the Zener impedance of BZX84B5V1LT1 at 5 mA?
The BZX84B5V1LT1 has a maximum Zener impedance (ZZT) of 60 Ω measured at 5 mA Zener test current (IZT) and 25°C ambient. This parameter is specified in the "ELECTRICAL CHARACTERISTICS − BZX84BxxxL (Tight Tolerance Series)" table on page 4 of the onsemi datasheet for BZX84B5V1LT1.
BZX84B5V1LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- BZX84BxxxLT1
- 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:
- ±2%
- 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)
BZX84B5V1LT1 FAQ
1.How can I place an order for BZX84B5V1LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B5V1LT1 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 BZX84B5V1LT1 reliable?
The price and inventory of BZX84B5V1LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84B5V1LT1 is usually 5 days.
3.What payment methods are accepted for BZX84B5V1LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B5V1LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B5V1LT1?
BZX84B5V1LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B5V1LT1 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 BZX84B5V1LT1?
For technical support, including BZX84B5V1LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B5V1LT1 requirements.
6.How does Aetrix verify that BZX84B5V1LT1 is sourced from the original manufacturer or authorized distributors?
All BZX84B5V1LT1 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 BZX84B5V1LT1 meets industry standards.
7.What is the process for return or replacement of BZX84B5V1LT1?
All BZX84B5V1LT1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B5V1LT1, 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 BZX84B5V1LT1 part is unused and in its original packaging.
Return procedure for BZX84B5V1LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84B5V1LT1 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZT52C15-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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