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Nexperia USA Inc. BZX84-A3V9,215
- Part No.:
- BZX84-A3V9,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-A3V9,215.pdf
- Description:
- DIODE ZENER 3.9V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,542
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Product details
Overview
BZX84-A3V9,215 from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, designed for precision low-voltage reference and overvoltage protection in space-constrained PCBs. It delivers 3.9 V nominal breakdown at 5 mA, with 90 Ω max differential resistance, 3 µA max reverse current at 1 V, and operates across –55 °C to +150 °C ambient.
For engineers reviewing the BZX84-A3V9,215 datasheet, BZX84-A3V9,215 pinout, BZX84-A3V9,215 application, or BZX84-A3V9,215 equivalent, this page provides verified electrical specs, thermal behavior, SOT23 terminal mapping, real-world regulation use cases, and validated alternative parts for design-in flexibility and supply continuity.
Technical Context
This device functions as a two-terminal shunt voltage reference, operating in reverse-biased breakdown mode with stable 3.9 V regulation at IZ = 5 mA. Its ±1 % tolerance and low temperature coefficient (–3.5 to 0.0 mV/K) support tight voltage margining in feedback loops and analog sensing circuits.
Thermal performance is defined by Rth(j-a) = 500 K/W (FR4, single-sided copper), limiting continuous power dissipation to 250 mW at Tamb ≤ 25 °C. Non-repetitive surge capability reaches 40 W for 100 µs pulses, enabling transient clamping in low-energy interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 3.86 V to 3.94 V at IZ = 5 mA - ensures precise 3.9 V reference under standard test conditions |
| Differential Resistance rdif | ≤90 Ω - maintains low output impedance for stable regulation under load variation |
| Reverse Current IR | ≤3 µA at VR = 1 V - minimizes standby leakage in battery-powered systems |
| Total Power Dissipation Ptot | 250 mW at Tamb ≤ 25 °C - defines maximum continuous DC power on standard FR4 PCB |
| Non-repetitive Peak Power | 40 W for tp = 100 µs - supports ESD/inductive spike suppression without failure |
| Junction Temperature Range | –55 °C to +150 °C - enables operation in industrial and automotive-adjacent environments |
| Package | SOT23 (TO-236AB) - surface-mount footprint compatible with automated assembly and high-density layouts |
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-biased terminal; connects to lower-potential node in shunt regulation 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 regulated voltage rail and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % VZ tolerance | Enables accurate voltage setting without post-production trimming in 3.3 V and 5 V system rails |
| Low rdif (≤90 Ω) | Reduces regulation error under dynamic load shifts, critical for ADC reference stability |
| 3 µA max IR at 1 V | Extends battery life in always-on sensor nodes and low-power IoT endpoints |
| 40 W surge rating | Provides robustness against IEC 61000-4-2 Level 4 ESD events without external TVS |
| 150 °C max Tj | Supports placement near heat-generating components (e.g., DC-DC converters) without derating |
Applications
| Power Supply Feedback | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Regulating feedback voltage in adjustable buck converter ICs (e.g., LM267x, MP158x). IC Role / Device Role / Timing Role: Shunt reference providing stable 3.9 V setpoint to error amplifier input. Use Value: Enables ±1 % output voltage accuracy and reduces need for external precision resistors. |
Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCUs during brown-out conditions. IC Role / Device Role / Timing Role: Threshold detector clamping reset line until VCC exceeds 3.9 V. Use Value: Eliminates discrete RC timing network, improving reset repeatability across temperature. |
| ADC Reference Stabilization | Overvoltage Clamp for GPIO |
Use Scenario: Biasing reference input of 12-bit SAR ADCs (e.g., ADS7953) in data acquisition modules. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source replacing higher-cost bandgap references. Use Value: Limits reference drift to <±0.5 mV over –40 °C to +85 °C, preserving ENOB. |
Use Scenario: Protecting 3.3 V I/O pins of FPGA configuration banks from accidental 5 V misconnection. IC Role / Device Role / Timing Role: Fast-acting clamp diverting excess current when VIN > 3.9 V + VF. Use Value: Absorbs up to 40 W transient energy without latch-up, meeting IEC 61000-4-5 surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9,215 | ±5 % tolerance (3.7 V–4.1 V), higher IR (5 µA), same package and Ptot | Acceptable where cost sensitivity outweighs voltage accuracy; unsuitable for precision feedback | Select when budget constraints dominate and ±5 % regulation error is acceptable in non-critical rails |
| MMSZ4684T1G | ±5 % tolerance, 3.8 V–4.0 V range, 225 mW Ptot, SOD-123 package | Larger footprint, lower power rating, different thermal resistance (Rth(j-a) ≈ 625 K/W) | Choose only if SOD-123 is already standardized in layout and 25 mW lower dissipation is tolerable |
Compared with BZX84-A3V9,215, the BZX84-C3V9,215 trades voltage precision for lower unit cost, while MMSZ4684T1G requires PCB redesign due to larger package and reduced thermal performance-neither offers drop-in compatibility without validation.
Availability
BZX84-A3V9,215 is available at Aetrix Electronics and suitable for power supply feedback, microcontroller reset circuitry, ADC reference stabilization, and overvoltage clamp for GPIO requiring stable component supply across industrial control, instrumentation, and consumer electronics programs.
Supply support for BZX84-A3V9,215 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, headquartered in Nijmegen, Netherlands.
The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage reference and protection in cost-sensitive, space-constrained applications across consumer, industrial, and computing markets.
FAQ
What is the maximum continuous forward current for BZX84-A3V9,215?
The absolute maximum forward current is 200 mA per the limiting values table. However, sustained forward conduction is not intended in normal operation; the device is rated for reverse-bias regulation. Forward voltage is specified at 10 mA (≤0.9 V), and exceeding 200 mA risks permanent junction damage even briefly.
Can BZX84-A3V9,215 be used in place of a 3.3 V Zener diode?
No-it is a 3.9 V nominal Zener. Substituting it for a 3.3 V part would raise the regulated voltage by 0.6 V, potentially violating IC input voltage limits or causing incorrect comparator thresholds. For 3.3 V regulation, BZX84-A3V3,215 (3.26–3.34 V) is the correct ±1 % variant.
Is pin 2 electrically isolated or internally tied to the cathode?
Pin 2 is explicitly marked "n.c." (not connected) in the pinning diagram and data sheet. It has no internal bond wire or die connection and must remain unconnected on the PCB. Soldering or routing to pin 2 introduces risk of mechanical stress or unintended parasitic coupling.
How does ambient temperature affect the 3.9 V regulation accuracy?
At IZ = 5 mA, the temperature coefficient ranges from –3.5 mV/K to 0.0 mV/K. Over –40 °C to +125 °C, this produces a worst-case shift of ±0.58 V (≈±15 %), but actual drift is typically <±0.1 V in most operating ranges due to curvature and current-dependent behavior documented in Figures 6–7.
BZX84-A3V9,215 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:
- ±1%
- 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-A3V9,215 FAQ
1.How can I place an order for BZX84-A3V9,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-A3V9,215 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-A3V9,215 reliable?
The price and inventory of BZX84-A3V9,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-A3V9,215 is usually 5 days.
3.What payment methods are accepted for BZX84-A3V9,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-A3V9,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-A3V9,215?
BZX84-A3V9,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-A3V9,215 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-A3V9,215?
For technical support, including BZX84-A3V9,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-A3V9,215 requirements.
6.How does Aetrix verify that BZX84-A3V9,215 is sourced from the original manufacturer or authorized distributors?
All BZX84-A3V9,215 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-A3V9,215 meets industry standards.
7.What is the process for return or replacement of BZX84-A3V9,215?
All BZX84-A3V9,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-A3V9,215, 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-A3V9,215 part is unused and in its original packaging.
Return procedure for BZX84-A3V9,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-A3V9,215 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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