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Nexperia USA Inc. BZX84W-C3V0F
- Part No.:
- BZX84W-C3V0F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C3V0F.pdf
- Description:
- DIODE ZENER 3V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5
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Product details
Overview
BZX84W-C3V0F from Nexperia is a ±5% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 3.0 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and 10 µA reverse current at 1 V, used for precision low-voltage regulation in compact power supply rails and reference circuits.
For engineers reviewing the BZX84W-C3V0F datasheet, BZX84W-C3V0F pinout, BZX84W-C3V0F application, or BZX84W-C3V0F equivalent, this page delivers verified Zener parameters, thermal resistance (455 K/W), differential resistance (95 Ω), temperature coefficient (−2.1 mV/K), and SOT323 terminal mapping to support accurate circuit modeling and board layout.
Technical Context
This Zener diode operates in reverse breakdown mode with a tightly controlled 3.0 V nominal regulation voltage at IZ = 5 mA, exhibiting −2.1 mV/K temperature coefficient and 95 Ω differential resistance-enabling stable low-voltage references across industrial ambient ranges (−55 °C to +150 °C).
Its SOT323 package features three terminals (anode, cathode, and n.c.), supports reflow/wave soldering per JEDEC standards, and delivers 275 mW power handling on FR4 PCB with single-sided copper-optimized for space-constrained, high-frequency decoupling and biasing functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.0 V nominal at IZ = 5 mA; ±5% tolerance ensures 2.80–3.20 V regulation window for reliable low-voltage reference design. |
| Reverse Current (IR) | 10 µA max at VR = 1 V; low leakage preserves accuracy in battery-powered or high-impedance bias networks. |
| Differential Resistance (rdif) | 95 Ω max at IZ = 5 mA; defines dynamic impedance affecting regulation stability under load transients. |
| Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; sets maximum continuous DC power before thermal derating applies. |
| Thermal Resistance (Rth(j-a)) | 455 K/W junction-to-ambient; determines temperature rise per watt-critical for thermal margin in sealed enclosures. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; enables use as forward-biased clamp or ESD protection path when needed. |
| Temperature Coefficient (SZ) | −2.1 mV/K at IZ = 5 mA; quantifies voltage drift per degree-key for temperature-sensitive analog references. |
Pinout & Package
SOT323 (SC-70) leadless surface-mount package: 1.35 mm × 1.75 mm footprint, 0.65 mm pitch, 0.9 mm height; optimized for automated placement and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node during Zener operation (reverse bias). |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating-no PCB trace or solder mask opening required. |
| 3 | Cathode (K) | Reverse-bias terminal tied to regulated output node; provides Zener breakdown path to ground or reference rail. |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective selection for non-critical 3.0 V references without requiring tighter-tolerance (±2%) B-series variants. |
| Low 10 µA reverse leakage at 1 V | Minimizes quiescent current draw in always-on monitoring circuits and extends battery life in portable devices. |
| 95 Ω differential resistance | Provides predictable regulation stiffness-supports stable feedback in LDO pre-regulators and sensor excitation supplies. |
| 455 K/W thermal resistance | Allows direct thermal modeling on standard FR4; simplifies derating calculations for ambient temperatures up to +85 °C. |
| SOT323 mechanical robustness | Withstands JEDEC J-STD-020 reflow profiles and meets IPC-A-610 Class 2 acceptability-ensuring assembly yield in high-volume production. |
Applications
| USB Port Overvoltage Clamp | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping transient surges on USB VBUS line to prevent damage to downstream USB controllers. IC Role / Device Role / Timing Role: Zener diode configured in reverse-bias between VBUS and ground, conducting above 3.0 V to shunt excess energy. Use Value: 3.0 V clamping threshold aligns with USB 2.0 overvoltage tolerance (5.5 V max), while low 10 µA leakage avoids loading idle bus states. |
Use Scenario: Generating a clean, temperature-stable reset threshold for 3.3 V microcontrollers during power-up and brownout events. IC Role / Device Role / Timing Role: Zener diode biased with resistor to create precise 3.0 V reference feeding comparator input in reset supervisor IC. Use Value: −2.1 mV/K temperature coefficient ensures <±20 mV drift over −40 °C to +85 °C-meeting typical MCU reset window requirements. |
| Low-Power Sensor Bias Supply | ADC Reference Stabilizer |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or bridge sensors in IoT edge nodes. IC Role / Device Role / Timing Role: Zener diode operated at 1–2 mA to deliver low-noise, low-drift bias independent of main supply variations. Use Value: 95 Ω differential resistance limits output impedance, reducing sensitivity to load changes and improving measurement repeatability. |
Use Scenario: Stabilizing reference voltage for 12-bit SAR ADCs in industrial data acquisition modules where supply ripple exceeds spec. IC Role / Device Role / Timing Role: Zener diode placed after LDO output to absorb low-frequency supply noise and suppress reference drift. Use Value: 275 mW power rating allows safe operation with series resistor limiting current to 5 mA-delivering stable 3.0 V despite 100 mV input ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5226BS | 3.0 V, ±5%, SOT-23 package, 350 mW Ptot, 100 Ω rdif, −2.5 mV/K SZ | Higher power rating but larger footprint; less suitable for ultra-dense layouts requiring SOT323 size constraint. | Select when higher surge tolerance or legacy SOT-23 compatibility is required over strict board area minimization. |
| Vishay BZX84-C3V0 | 3.0 V, ±5%, SOT-23 package, 300 mW Ptot, 90 Ω rdif, −2.2 mV/K SZ | Same electrical specs but different package; lacks n.c. pin-requires redesign of PCB pad layout and stencil. | Choose only if existing SOT-23 footprint is fixed and thermal margin permits 300 mW vs. 275 mW dissipation limit. |
Compared with MMBZ5226BS and BZX84-C3V0, BZX84W-C3V0F offers identical regulation performance in the smallest available footprint (SOT323), with verified 455 K/W thermal resistance enabling better thermal predictability on thin FR4 boards-making it optimal for miniaturized, thermally constrained designs.
Availability
BZX84W-C3V0F is available at Aetrix Electronics and suitable for USB protection circuits, microcontroller reset supervision, low-power sensor biasing, and ADC reference stabilization requiring stable component supply and consistent parametric performance across production lots.
Supply support for BZX84W-C3V0F 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 discrete and logic devices, with leadership in automotive, industrial, and consumer power management solutions.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-efficient voltage regulation in space-constrained consumer and industrial electronics-not qualified for automotive applications.
FAQ
What is the maximum continuous reverse current the BZX84W-C3V0F can handle without degradation?
The device supports up to 200 mA forward current (IF), but for Zener operation, the recommended maximum DC reverse current is 5 mA-based on its 275 mW power rating and 3.0 V Zener voltage. Exceeding 5 mA continuously risks exceeding Ptot and accelerating junction temperature rise beyond 150 °C.
Can BZX84W-C3V0F be used in place of a 3.3 V Zener diode?
No-BZX84W-C3V0F is specified for 3.0 V nominal Zener voltage with ±5% tolerance (2.80–3.20 V range). A 3.3 V variant (e.g., BZX84W-C3V3) has distinct VZ = 3.3 V (3.10–3.50 V), different differential resistance (95 Ω vs. 95 Ω), and temperature coefficient (−2.4 mV/K), making substitution electrically invalid without circuit recalibration.
Is the n.c. pin on BZX84W-C3V0F required to be left unconnected on the PCB?
Yes-the Pin 2 terminal is internally not connected and must remain unattached on the PCB. Connecting it to ground, VCC, or any signal violates the device's internal construction and may cause unpredictable leakage, thermal imbalance, or solder joint reliability issues during reflow.
How does the −2.1 mV/K temperature coefficient affect long-term voltage reference stability?
At a 50 °C ambient shift (e.g., from 25 °C to 75 °C), the Zener voltage drifts by −105 mV (−2.1 × 50), resulting in ~3.5% deviation from 3.0 V. This is acceptable for non-precision applications like reset thresholds but insufficient for high-accuracy references-where TC-compensated shunt regulators would be preferred.
BZX84W-C3V0F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 275 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:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C3V0F FAQ
1.How can I place an order for BZX84W-C3V0F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C3V0F 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 BZX84W-C3V0F reliable?
The price and inventory of BZX84W-C3V0F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C3V0F is usually 5 days.
3.What payment methods are accepted for BZX84W-C3V0F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C3V0F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C3V0F?
BZX84W-C3V0F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C3V0F 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 BZX84W-C3V0F?
For technical support, including BZX84W-C3V0F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C3V0F requirements.
6.How does Aetrix verify that BZX84W-C3V0F is sourced from the original manufacturer or authorized distributors?
All BZX84W-C3V0F 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 BZX84W-C3V0F meets industry standards.
7.What is the process for return or replacement of BZX84W-C3V0F?
All BZX84W-C3V0F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C3V0F, 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 BZX84W-C3V0F part is unused and in its original packaging.
Return procedure for BZX84W-C3V0F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C3V0F Tags
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MM5Z5V1ST1G
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