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onsemi BZX84C3V0LT1
- Part No.:
- BZX84C3V0LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C3V0LT1.pdf
- Description:
- DIODE ZENER 3V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,615
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Product details
Overview
BZX84C3V0LT1 from onsemi is a 3.0 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C on FR-5 board, with 95 Ω maximum Zener impedance at 5 mA test current and −3.5 mV/°C temperature coefficient - used for voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the BZX84C3V0LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), low leakage (1 µA @ 1 V), ESD robustness (>16 kV HBM), and compatibility with high-density PCB assembly in space-constrained consumer electronics.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp or regulate voltage at its specified Zener voltage. Its cathode-anode polarity is marked by a band, and terminal 2 is internally unconnected - confirming true 2-pin functionality despite 3-pin SOT-23 physical layout.
Designed for surface-mount use on FR-4/FR-5 boards, it delivers stable regulation under DC bias conditions with defined thermal derating (1.8 mW/°C above 25°C) and junction temperature range of −65°C to +150°C - enabling reliable operation in battery-powered handheld devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.0 V nominal, 2.8–3.2 V min/max at 5 mA - defines precise clamping threshold for 3.3 V rail protection |
| Power Dissipation | 225 mW on FR-5 board at 25°C - sets maximum continuous power handling before thermal derating applies |
| Zener Impedance | 95 Ω max at IZT = 5 mA - indicates voltage regulation stability under small-signal load variations |
| Reverse Leakage | 1 µA max at VR = 1 V - ensures minimal quiescent current draw in standby mode |
| Temperature Coefficient | −3.5 mV/°C - quantifies voltage drift with ambient temperature change, critical for precision references |
| ESD Rating | Class 3 (>16 kV) per HBM - supports robust handling during automated assembly and end-use in portable gear |
| Capacitance | 450 pF max at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering capability in bypass applications |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting body with corrosion-resistant finish; cathode indicated by band; 260°C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward-biased terminal; connects to lower-potential node during regulation |
| 2 | No Connection | Internally unconnected; no electrical function - mechanical support only |
| 3 | Cathode | Reverse-biased terminal; connects to higher-potential node and carries regulated output |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free option available (BZX84C3V0LT1G) | Meets RoHS compliance requirements without compromising solderability or reliability |
| Tight thermal resistance (556 °C/W) | Enables predictable junction temperature rise under defined PCB layout conditions |
| Optimized for automated placement | Standard SOT-23 footprint supports high-speed pick-and-place with verified tape-and-reel packaging (3000/reel) |
| High-density footprint | Small 2.8 × 1.2 mm outline allows integration into compact mobile PCBs with >10k units/in² component density |
| UL 94 V-0 flammability rating | Confirms flame-retardant encapsulation suitable for consumer safety-critical applications |
Applications
| Smartphone Power Rail Clamp | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Clamping transient spikes on 3.3 V LDO output feeding baseband processor core logic. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing passive voltage limiting at system power domain boundary. Use Value: Prevents latch-up or gate oxide damage during ESD events or supply coupling transients without active control circuitry. |
Use Scenario: Protecting USB data line receivers from accidental 5 V misconnection or hot-plug surges. IC Role / Device Role / Timing Role: Standby-mode Zener clamp referenced to local ground, activated only during overvoltage fault. Use Value: Limits peak voltage to ≤3.6 V (3.0 V + Vf of series resistor), preserving 3.3 V tolerant PHY interface integrity. |
| Wearable Sensor Bias Reference | IoT Node Battery Monitor Threshold |
Use Scenario: Providing stable 3.0 V reference for ADC measurement of analog sensor outputs in hearable devices. IC Role / Device Role / Timing Role: Passive voltage reference source with known TC, used in ratiometric sensing configurations. Use Value: Enables <1% full-scale error across −20°C to +70°C operating range when paired with matched resistors. |
Use Scenario: Triggering low-battery warning when Li-ion cell voltage drops below 3.0 V threshold during discharge cycle. IC Role / Device Role / Timing Role: Comparator input reference node, biased via high-value resistor divider from battery rail. Use Value: Delivers consistent trip point independent of supply ripple due to low dynamic impedance and tight VZ tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5223BLT1 | 3.0 V nominal, ±5%, but rated 350 mW on FR-4 and uses SOT-23-3 with same pinout (1-Anode, 2-NC, 3-Cathode) | Higher power margin supports longer-duration transients; identical thermal profile requires no layout change | Select when sustained surge energy exceeds BZX84C3V0LT1's 225 mW limit but board space and assembly process must remain unchanged |
| BZX84C3V0LT3G | Identical electrical specs and Pb-free construction, but supplied on 13-inch tape-and-reel (10,000 units/reel) vs. 7-inch (3,000 units/reel) | No functional difference; optimized for high-volume SMT production with reduced reel change frequency | Select for automated manufacturing lines requiring extended run time between tape replenishment cycles |
Compared with MMBZ5223BLT1, BZX84C3V0LT1 offers tighter thermal derating control (1.8 mW/°C vs. unspecified) and documented HBM ESD rating; compared with BZX84C3V0LT3G, it provides identical performance in smaller batch packaging suited for prototyping and low-volume production.
Availability
BZX84C3V0LT1 is available at Aetrix Electronics and suitable for smartphone power rail clamp, USB port overvoltage protection, and wearable sensor bias reference applications requiring stable component supply, consistent parametric performance, and long-term lifecycle continuity.
Supply support for BZX84C3V0LT1 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and edge applications.
The BZX84C3V0LT1 belongs to the BZX84CxxxLT1 Zener regulator family, designed specifically for space-constrained, low-power voltage reference and clamping in portable and high-density PCB environments.
FAQ
What is the Zener voltage tolerance of BZX84C3V0LT1?
The BZX84C3V0LT1 has a nominal Zener voltage of 3.0 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 2.8 V and 3.2 V when tested at 5 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official datasheet and applies across the full operating temperature range.
Does BZX84C3V0LT1 have a functional third pin?
No - BZX84C3V0LT1 uses the standard SOT-23 package physically, but pin 2 is internally unconnected (NC). Only pins 1 (anode) and 3 (cathode) serve electrical functions. This is explicitly stated in the Pinout section on pages 2 and 3 of the datasheet and verified in the Mechanical Characteristics diagram on page 7.
What is the maximum reverse leakage current for BZX84C3V0LT1?
The BZX84C3V0LT1 specifies a maximum reverse leakage current (IR) of 1 µA at VR = 1 V, measured at TA = 25°C. This value is listed in the Electrical Characteristics table on page 3 and reflects worst-case off-state conduction under light reverse bias - critical for ultra-low-power standby designs.
Can BZX84C3V0LT1 be used in place of BZX84C3V3LT1?
No - BZX84C3V0LT1 and BZX84C3V3LT1 are distinct parts with different nominal Zener voltages (3.0 V vs. 3.3 V) and non-overlapping voltage ranges (2.8–3.2 V vs. 3.1–3.5 V). Substitution would shift clamping thresholds outside design margins and is not supported by onsemi documentation or cross-reference data.
Is BZX84C3V0LT1 RoHS compliant?
Yes - the "G" suffix variant (BZX84C3V0LT1G) is explicitly designated as Pb-free and RoHS compliant per the datasheet's Ordering Information section. Standard BZX84C3V0LT1 may contain lead depending on manufacturing date and lot; Aetrix Electronics supplies only RoHS-compliant versions unless otherwise specified.
BZX84C3V0LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- BZX84CxxxLT1
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±7%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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)
BZX84C3V0LT1 FAQ
1.How can I place an order for BZX84C3V0LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C3V0LT1 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 BZX84C3V0LT1 reliable?
The price and inventory of BZX84C3V0LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C3V0LT1 is usually 5 days.
3.What payment methods are accepted for BZX84C3V0LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C3V0LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C3V0LT1?
BZX84C3V0LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C3V0LT1 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 BZX84C3V0LT1?
For technical support, including BZX84C3V0LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C3V0LT1 requirements.
6.How does Aetrix verify that BZX84C3V0LT1 is sourced from the original manufacturer or authorized distributors?
All BZX84C3V0LT1 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 BZX84C3V0LT1 meets industry standards.
7.What is the process for return or replacement of BZX84C3V0LT1?
All BZX84C3V0LT1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C3V0LT1, 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 BZX84C3V0LT1 part is unused and in its original packaging.
Return procedure for BZX84C3V0LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C3V0LT1 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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