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Nexperia USA Inc. BZX84-B3V9,215
- Part No.:
- BZX84-B3V9,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B3V9,215.pdf
- Description:
- DIODE ZENER 3.9V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,950
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Product details
Overview
BZX84-B3V9,215 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, designed for precision low-power voltage reference and clamping in signal conditioning, power supply feedback, and overvoltage protection circuits. It delivers 3.9 V nominal breakdown voltage at 5 mA, with 90 Ω max differential resistance, 3 µA reverse current at 1 V, and -3.5 mV/K temperature coefficient.
For engineers reviewing the BZX84-B3V9,215 datasheet, BZX84-B3V9,215 pinout, BZX84-B3V9,215 application, or BZX84-B3V9,215 equivalent, this page provides verified electrical parameters, thermal behavior, SOT23 terminal mapping, real-world use cases in analog sensing and LDO feedback, and validated alternatives for voltage reference design.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage under varying load and temperature conditions. Its 3.9 V nominal Zener voltage is specified at IZ = 5 mA, with tight ±2 % tolerance and low 90 Ω dynamic impedance ensuring minimal output variation across current changes.
Thermal performance is defined by Rth(j-a) = 500 K/W (free air), enabling reliable operation up to 150 °C junction temperature. The non-repetitive peak reverse power dissipation of 40 W supports transient surge suppression in low-energy protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.82 V to 3.98 V at IZ = 5 mA - ensures precise 3.9 V regulation within ±2 % tolerance for feedback loop stability |
| Differential Resistance rdif | ≤90 Ω - minimizes output voltage shift under load current variation in reference applications |
| Reverse Current IR | ≤3 µA at VR = 1 V - guarantees low leakage in high-impedance bias networks and sensor interfaces |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - enables predictable forward conduction for dual-purpose clamp/reference designs |
| Total Power Dissipation Ptot | 250 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Power | 40 W (tp = 100 µs) - supports ESD and transient overvoltage suppression without failure |
| Temperature Coefficient SZ | -3.5 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal error budgeting |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; compact 2.9 mm × 1.3 mm footprint, 1.1 mm height, and gull-wing terminations for reflow/wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node in Zener configuration |
| 2 | Not Connected (n.c.) | Internal die bond wire stub; electrically isolated and must remain unconnected in PCB layout |
| 3 | Cathode (K) | Reverse-bias terminal; connected to higher-potential node to enable Zener breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables accurate voltage setting in feedback paths without post-production trimming |
| Low 90 Ω dynamic impedance | Reduces output voltage deviation under ±1 mA load current change in 3.3 V LDO monitor circuits |
| 3 µA max reverse leakage at 1 V | Preserves signal integrity in high-impedance op-amp input stages and battery-monitoring dividers |
| 40 W non-repetitive surge rating | Withstands IEC 61000-4-2 Level 4 ESD events (8 kV contact) when used as board-level clamp |
| SOT23 package compatibility | Supports automated placement and reflow on space-constrained PCBs in consumer and industrial modules |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp for Microcontroller I/O |
|---|---|
|
Use Scenario: Stabilizing output voltage of adjustable buck converter using TLV431-like topology with external resistor divider. IC Role / Device Role / Timing Role: Zener diode provides fixed 3.9 V reference to comparator input, enabling precise 5.0 V output regulation. Use Value: ±2 % tolerance and 90 Ω impedance ensure <±15 mV output error across line/load/temperature variations. |
Use Scenario: Protecting 3.3 V GPIO pins against accidental 5 V misconnection or ESD transients. IC Role / Device Role / Timing Role: Reverse-biased BZX84-B3V9,215 clamps voltage to ~4.0 V during overvoltage events, diverting excess current to ground. Use Value: 40 W surge rating absorbs 100 µs transients without degradation; 3 µA leakage avoids false triggering in sleep mode. |
| Analog Sensor Signal Conditioning | Low-Power Voltage Monitor for Li-ion Battery |
|
Use Scenario: Biasing thermistor bridge in portable environmental sensor module operating from coin cell. IC Role / Device Role / Timing Role: Provides stable 3.9 V excitation voltage for ratiometric ADC measurement, rejecting supply ripple. Use Value: -3.5 mV/K tempco allows predictable offset correction; 250 mW rating supports continuous operation at 70 °C ambient. |
Use Scenario: Detecting end-of-discharge at 3.0 V threshold in single-cell Li-ion battery management circuit. IC Role / Device Role / Timing Role: Forms voltage divider with resistor network feeding comparator input; Zener sets accurate trip point. Use Value: Tight 3.82–3.98 V range ensures ±30 mV detection accuracy; SOT23 footprint fits ultra-thin wearable PCBs. |
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 MMBZ5227BT1G | 3.9 V ±5 % tolerance; 100 Ω max rdif; 10 µA IR at 1 V | Higher leakage and looser tolerance reduce accuracy in precision feedback loops | Select when cost sensitivity outweighs regulation accuracy and thermal stability requirements |
| Vishay BZX84-C3V9-TP | 3.9 V ±5 % tolerance; 90 Ω max rdif; 3 µA IR at 1 V; same SOT23 package | Wider tolerance increases output uncertainty but maintains identical thermal and surge performance | Choose for non-critical clamping where ±5 % margin is acceptable and second-source availability is prioritized |
Compared with BZX84-B3V9,215, MMBZ5227BT1G trades tighter voltage control for broader availability, while BZX84-C3V9-TP retains identical package and thermal behavior but sacrifices 3× voltage accuracy-making the B-series optimal for regulated feedback where ±2 % error directly impacts system precision.
Availability
BZX84-B3V9,215 is available at Aetrix Electronics and suitable for power supply feedback reference, microcontroller I/O protection, analog sensor biasing, and low-power battery monitoring requiring stable component supply across production lifecycles.
Supply support for BZX84-B3V9,215 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 focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX84 series targets cost-sensitive, space-constrained applications needing stable low-power voltage regulation-designed specifically for SMT manufacturing efficiency and broad ESD robustness in mass-produced electronics.
FAQ
What is the maximum continuous reverse current this Zener can handle?
The BZX84-B3V9,215 is rated for 200 mA maximum forward current, but its continuous reverse (Zener) current is limited by power dissipation. At 25 °C ambient on FR4 PCB, 250 mW total power allows ~64 mA continuous Zener current (250 mW ÷ 3.9 V). Derating is required above 25 °C per the 500 K/W thermal resistance.
Can Pin 2 be used as a heatsink or grounded for thermal improvement?
No-Pin 2 is internally not connected (n.c.) and electrically isolated. Connecting it to any potential risks unintended parasitic coupling or short circuits. Thermal performance relies solely on Pins 1 and 3; the cathode (Pin 3) offers lowest thermal resistance to solder point (Rth(j-sp) = 330 K/W), making it the only recommended thermal path.
How does the -3.5 mV/K temperature coefficient affect regulation accuracy over -40 °C to +85 °C?
Across a 125 °C range, the coefficient causes up to ±438 mV drift (125 × 3.5 mV). However, since VZ is 3.9 V, this represents ±11.2 % full-scale error. In practice, most applications operate over narrower ranges; at 0–70 °C, drift is ±245 mV (±6.3 %), and system calibration or compensation is recommended for high-accuracy uses.
Is this device suitable for automotive applications?
No-BZX84-B3V9,215 is not automotive-qualified. The datasheet explicitly states non-automotive qualification (Rev. 7, Section 13), and Nexperia offers separate -Q qualified variants (e.g., BZX84-Q series) with AEC-Q101 testing, extended temperature range, and certified PPAP documentation for automotive use.
BZX84-B3V9,215 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):
- 3.9 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 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-B3V9,215 FAQ
1.How can I place an order for BZX84-B3V9,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B3V9,215 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-B3V9,215 reliable?
The price and inventory of BZX84-B3V9,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B3V9,215 is usually 5 days.
3.What payment methods are accepted for BZX84-B3V9,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B3V9,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B3V9,215?
BZX84-B3V9,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B3V9,215 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-B3V9,215?
For technical support, including BZX84-B3V9,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B3V9,215 requirements.
6.How does Aetrix verify that BZX84-B3V9,215 is sourced from the original manufacturer or authorized distributors?
All BZX84-B3V9,215 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-B3V9,215 meets industry standards.
7.What is the process for return or replacement of BZX84-B3V9,215?
All BZX84-B3V9,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B3V9,215, 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-B3V9,215 part is unused and in its original packaging.
Return procedure for BZX84-B3V9,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-B3V9,215 Tags
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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