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Nexperia USA Inc. BZX84W-B47F
- Part No.:
- BZX84W-B47F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B47F.pdf
- Description:
- DIODE ZENER 47V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,069
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Product details
Overview
BZX84W-B47F from Nexperia is a ±2% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 47 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and 150 °C maximum junction temperature, used for precision voltage reference and overvoltage protection in compact DC power rails.
For engineers reviewing the BZX84W-B47F datasheet, BZX84W-B47F pinout, BZX84W-B47F application, or BZX84W-B47F equivalent, this page delivers verified Zener voltage, differential resistance, temperature coefficient, reverse leakage, and thermal resistance data directly applicable to low-power regulation, ESD clamping, and reference design validation.
Technical Context
This Zener diode operates in reverse breakdown with a specified 47 V nominal Zener voltage (VZ) at IZ = 5 mA, exhibiting 375 Ω typical differential resistance (rdif) and +46.1 mV/K temperature coefficient (SZ). It maintains stable regulation under ambient temperatures from −55 °C to +150 °C.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 275 mW steady-state power dissipation and withstands non-repetitive peak reverse power up to 40 W for 100 µs pulses, with 0.5 pF diode capacitance at 1 MHz and 0 V bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 47 V nominal at IZ = 5 mA; ±2% tolerance ensures tight regulation in feedback loops |
| Differential Resistance rdif | 375 Ω max at IZ = 2 mA; defines output impedance and load regulation sensitivity |
| Temperature Coefficient SZ | +46.1 mV/K at IZ = 2 mA; quantifies voltage drift per degree Celsius rise |
| Reverse Leakage IR | 50 nA max at VR = 0.7 × VZnom; critical for low-current standby circuits |
| Total Power Dissipation Ptot | 275 mW at Tamb = 25 °C on standard FR4; sets continuous thermal derating envelope |
| Thermal Resistance Rth(j-a) | 455 K/W in free air; determines junction-to-ambient temperature rise per watt |
| Forward Voltage VF | 0.9 V max at IF = 10 mA; defines conduction loss during forward-biased operation |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals, optimized for high-density PCB layouts and reflow/wave soldering per Figures 9–10 in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential side in Zener regulation |
| 2 | Not Connected (n.c.) | Electrically isolated terminal; no internal bond wire or die connection |
| 3 | Cathode (K) | Reverse-bias terminal; connected to higher-potential side for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables precise voltage reference without external trimming in 5 V–47 V range |
| Low 0.5 pF diode capacitance | Minimizes signal distortion and phase shift in high-frequency clamp and timing circuits |
| Non-repetitive 40 W surge rating | Supports transient overvoltage suppression without failure in 100 µs events |
| SOT323 footprint compatibility | Matches industry-standard SC-70 land patterns for automated assembly and IPC-7351B compliance |
| −55 °C to +150 °C operating range | Validates use in extended-temperature industrial and outdoor electronics |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback node in low-current linear regulators or switching converter error amplifiers. IC Role / Device Role / Timing Role: Provides fixed 47 V reference voltage to comparator input for output voltage sensing. Use Value: ±2% tolerance ensures <1% output regulation error; 375 Ω rdif limits load-induced drift under 100 µA feedback current. |
Use Scenario: Protecting microcontroller I/O pins from 48 V bus transients in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Shunts excess energy above 47 V to ground during ESD or inductive kick events. Use Value: 40 W non-repetitive surge rating absorbs 4 kV HBM-equivalent spikes; 50 nA leakage avoids false triggering in sleep mode. |
| Signal Level Translation | Temperature-Stable Bias Generator |
|
Use Scenario: Clamping analog sensor outputs to 47 V rail in automotive battery monitoring systems. IC Role / Device Role / Timing Role: Limits signal swing to prevent ADC saturation while preserving linearity below clamp threshold. Use Value: 0.5 pF capacitance avoids high-frequency roll-off; +46.1 mV/K SZ enables predictable offset compensation across −40 °C to +125 °C. |
Use Scenario: Generating stable bias current for op-amp input stages in precision instrumentation amplifiers. IC Role / Device Role / Timing Role: Sets reference current via series resistor, leveraging VZ stability over temperature. Use Value: +46.1 mV/K coefficient allows matched TC resistor selection to achieve <50 ppm/°C bias drift; 275 mW Ptot supports 1 mA bias current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C47 | ±5% tolerance (vs. ±2%), same 47 V nominal, identical SOT323 package and thermal specs | Acceptable where cost sensitivity outweighs regulation accuracy; higher VZ variation impacts closed-loop stability | Select when budget constraints dominate and system tolerances allow ±5% reference uncertainty |
| MMSZ47ET1G | ±5% tolerance, 47 V nominal, SOD-123 package (larger footprint), 500 mW Ptot, 300 Ω rdif | Higher power handling but incompatible with ultra-dense layouts; different thermal resistance (350 K/W) | Choose only if board space permits SOD-123 and >275 mW continuous dissipation is required |
Compared with BZX84W-C47, the BZX84W-B47F offers tighter voltage control essential for precision references; versus MMSZ47ET1G, it trades power margin for miniaturization and thermal compatibility with fine-pitch SMT designs.
Availability
BZX84W-B47F is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and portable medical devices requiring stable component supply and traceable sourcing.
Supply support for BZX84W-B47F 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 BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, high-frequency voltage regulation and protection in space-constrained consumer, industrial, and computing applications.
FAQ
What is the maximum continuous Zener current for BZX84W-B47F at 25 °C?
The maximum continuous Zener current is derived from Ptot = 275 mW and VZ = 47 V, yielding IZmax ≈ 5.85 mA. This assumes ideal heat sinking; actual usable current must be derated per Rth(j-a) = 455 K/W and ambient temperature per Figure 1 in the datasheet.
Does BZX84W-B47F have a connected pin 2, and what happens if it's soldered?
No - pin 2 is explicitly marked "n.c." (not connected) in Table 2 and has no internal die connection. Soldering it poses no electrical risk but may compromise mechanical reliability due to unintended thermal stress or solder bridging; best practice is to omit solder paste on that pad.
How does the +46.1 mV/K temperature coefficient affect regulation accuracy over temperature?
At 47 V nominal, +46.1 mV/K translates to ~0.098 %/°C drift. Over a 100 °C range (−25 °C to +75 °C), this causes ~9.8 V total shift - meaning regulation shifts from ~42.1 V to ~51.9 V. System-level compensation (e.g., matched TC resistors) is required for sub-1% stability.
Can BZX84W-B47F replace BZX84W-B43 in an existing design?
Only if the circuit tolerates a 4 V higher Zener voltage and associated changes in differential resistance (375 Ω vs. 375 Ω), leakage (50 nA vs. 3 µA at VR = 2 V), and temperature coefficient (+46.1 mV/K vs. +41.2 mV/K). Layout and thermal margins remain identical due to shared SOT323 package and Ptot.
BZX84W-B47F 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):
- 47 V
- Tolerance:
- ±2%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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-B47F FAQ
1.How can I place an order for BZX84W-B47F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B47F 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-B47F reliable?
The price and inventory of BZX84W-B47F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B47F is usually 5 days.
3.What payment methods are accepted for BZX84W-B47F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B47F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B47F?
BZX84W-B47F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B47F 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-B47F?
For technical support, including BZX84W-B47F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B47F requirements.
6.How does Aetrix verify that BZX84W-B47F is sourced from the original manufacturer or authorized distributors?
All BZX84W-B47F 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-B47F meets industry standards.
7.What is the process for return or replacement of BZX84W-B47F?
All BZX84W-B47F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B47F, 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-B47F part is unused and in its original packaging.
Return procedure for BZX84W-B47F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B47F Tags
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