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Nexperia USA Inc. BZX84-A5V1,235
- Part No.:
- BZX84-A5V1,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-A5V1,235.pdf
- Description:
- DIODE ZENER 5.1V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,160
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Product details
Overview
BZX84-A5V1,235 from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, designed for precision low-power voltage reference and clamping in space-constrained PCBs. It delivers 5.1 V nominal breakdown at 5 mA, with 480 Ω max differential resistance, 2 μA max reverse current at 3.8 V, and -2.7 to +1.2 mV/K temperature coefficient - used in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the BZX84-A5V1,235 datasheet, BZX84-A5V1,235 pinout, BZX84-A5V1,235 application, or BZX84-A5V1,235 equivalent, this page provides verified Zener parameters, SOT23 terminal mapping, thermal resistance data, and validated alternatives for voltage reference design, ESD clamp selection, and analog signal conditioning.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable DC voltage under varying load and temperature conditions. Its ±1 % tolerance and low 480 Ω dynamic impedance ensure tight regulation in feedback networks of LDOs and switching regulators.
Designed for surface-mount assembly on FR4 PCBs with single-sided 70 µm copper, it supports non-repetitive 40 W surge dissipation (100 µs pulse) and continuous 250 mW operation at ≤25 °C ambient - with junction-to-ambient thermal resistance of 500 K/W in free air.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 5.04 V to 5.16 V at IZ = 5 mA - defines precise regulation point for feedback or clamp circuits |
| Differential Resistance (rdif) | ≤480 Ω - low impedance ensures minimal output voltage shift under load variation |
| Reverse Current (IR) | ≤2 μA at VR = 3.8 V - enables low-leakage biasing in high-impedance nodes |
| Temperature Coefficient (SZ) | -2.7 to +1.2 mV/K - quantifies VZ drift per degree Celsius for thermal stability analysis |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard PCB |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 μs - supports transient overvoltage suppression without failure |
| Junction Temperature (Tj) | 150 °C maximum - constrains thermal design margin for long-term reliability |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with 1.9 mm × 1.1 mm footprint and 1.2 mm height - optimized for automated pick-and-place and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener configuration |
| 2 | Not Connected (n.c.) | Internal die pad with no electrical connection - must remain unconnected on PCB |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and regulates voltage at cathode-to-anode drop |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % voltage tolerance | Enables direct replacement in precision references without recalibration or resistor trimming |
| 250 mW total power rating | Supports regulation in low-current analog stages (e.g., op-amp bias, sensor excitation) |
| 40 W non-repetitive surge capability | Provides robustness against ESD and line transients in unprotected input paths |
| SOT23 package compatibility | Ensures drop-in fit with industry-standard footprints and reflow profiles (J-STD-020) |
| 150 °C max junction temperature | Allows operation in industrial environments with limited airflow or elevated ambient temperatures |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
|
Use Scenario: Regulating output voltage of a 5 V buck converter by feeding back a scaled version of output to error amplifier. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt reference in TL431-like feedback divider network. Use Value: ±1 % VZ tolerance maintains output accuracy within ±1.5 % across line/load/temperature without trim potentiometer. |
Use Scenario: Protecting microcontroller GPIO pins from accidental 12 V misconnection on shared I/O header. IC Role / Device Role / Timing Role: Shunt clamp device placed between I/O line and ground, conducting above 5.1 V. Use Value: 480 Ω rdif limits clamping voltage rise to <6.5 V at 20 mA fault current, preventing latch-up. |
| Low-Power Sensor Biasing | Signal Level Translation |
|
Use Scenario: Providing stable 5.1 V bias to a resistive temperature detector (RTD) bridge in battery-powered IoT node. IC Role / Device Role / Timing Role: Low-leakage Zener establishes reference potential for excitation current source. Use Value: ≤2 μA reverse current at 3.8 V minimizes quiescent drain on coin-cell supply during sleep mode. |
Use Scenario: Converting 0–3.3 V logic signals to 0–5 V range for legacy ADC interface with 5 V reference. IC Role / Device Role / Timing Role: Cathode-connected Zener clamps high-side signal to 5.1 V while passing low states through. Use Value: Fast response (<1 ns) and low capacitance (<300 pF) preserve signal edge integrity up to 1 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5222BS | Same 5.1 V nominal, ±5 % tolerance, 225 mW Ptot, SOT23 package | Higher VZ drift (±5 % vs ±1 %) requires tighter external resistor matching | Select when cost sensitivity outweighs regulation precision and thermal stability requirements |
| Vishay BZX84-C5V1 | Same 5.1 V nominal, ±5 % tolerance, 250 mW Ptot, identical SOT23 pinout | Higher 500 μA max IR at 3.8 V reduces leakage-critical performance in high-Z bias networks | Choose for general-purpose clamping where ±5 % tolerance is acceptable and legacy stock exists |
Compared with BZX84-A5V1,235, MMBZ5222BS trades precision for lower cost and wider availability, while BZX84-C5V1 retains identical packaging and power rating but sacrifices regulation accuracy and leakage performance - making the A-grade part optimal for feedback references demanding <±10 mV stability.
Availability
BZX84-A5V1,235 is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage clamp protection, low-power sensor biasing, and signal level translation requiring stable component supply and consistent ±1 % Zener voltage performance.
Supply support for BZX84-A5V1,235 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
Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices - focused on efficiency, miniaturization, and automotive-grade quality.
The BZX84 series belongs to Nexperia's precision Zener regulator portfolio, engineered for low-power voltage reference and clamping in consumer, industrial, and communication equipment where SOT23 footprint and ±1 % tolerance are critical.
FAQ
What is the maximum continuous forward current for BZX84-A5V1,235?
The BZX84-A5V1,235 is not rated for continuous forward conduction; its absolute maximum forward current is 200 mA per limiting values table, but typical operation is reverse-biased. Forward voltage is specified at 0.9 V max at 10 mA pulse test (tp ≤ 100 μs), and sustained forward bias risks thermal runaway due to lack of thermal derating data in forward mode.
Can BZX84-A5V1,235 replace a 5.1 V Zener with ±5 % tolerance in an existing design?
Yes - it is pin-compatible and electrically substitutable, but delivers tighter regulation (±1 % vs ±5 %). This improves output accuracy in feedback loops and reduces worst-case voltage error in clamp circuits, though no layout or bill-of-material change is required beyond part number update.
How does the n.c. pin (Pin 2) affect PCB layout?
Pin 2 is internally unconnected and must remain unbonded and un-soldered on the PCB. Routing traces or placing copper under Pin 2 violates the SOT23 mechanical outline and may cause solder bridging or thermal stress; the recommended footprint excludes copper at that location per Nexperia's Fig. 12 and Fig. 13.
Is BZX84-A5V1,235 qualified for automotive applications?
No - per Revision 7 (January 2023) datasheet Section 13, this part is explicitly non-automotive qualified. Nexperia offers separate -Q qualified variants (e.g., BZX84-Q series) for AEC-Q101 compliance; using BZX84-A5V1,235 in automotive systems voids warranty and violates safety-critical design requirements.
BZX84-A5V1,235 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84
- 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:
- ±1%
- Power - Max:
- 250 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-A5V1,235 FAQ
1.How can I place an order for BZX84-A5V1,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-A5V1,235 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 BZX84-A5V1,235 reliable?
The price and inventory of BZX84-A5V1,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-A5V1,235 is usually 5 days.
3.What payment methods are accepted for BZX84-A5V1,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-A5V1,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-A5V1,235?
BZX84-A5V1,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-A5V1,235 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 BZX84-A5V1,235?
For technical support, including BZX84-A5V1,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-A5V1,235 requirements.
6.How does Aetrix verify that BZX84-A5V1,235 is sourced from the original manufacturer or authorized distributors?
All BZX84-A5V1,235 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 BZX84-A5V1,235 meets industry standards.
7.What is the process for return or replacement of BZX84-A5V1,235?
All BZX84-A5V1,235 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-A5V1,235, 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 BZX84-A5V1,235 part is unused and in its original packaging.
Return procedure for BZX84-A5V1,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-A5V1,235 Tags
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