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Nexperia USA Inc. BZX84W-C47-QF
- Part No.:
- BZX84W-C47-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C47-QF.pdf
- Description:
- DIODE ZENER 47V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,950
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Product details
Overview
BZX84W-C47-QF from Nexperia is a ±5 % tolerance Zener diode in SOT323 (SC-70) package, rated for 47 V nominal regulation voltage at 5 mA, with 275 mW total power dissipation and 375 Ω typical differential resistance at IZ = 2 mA. It is AEC-Q101 qualified and designed for precision voltage reference and overvoltage protection in automotive power rails and sensor interface circuits.
For engineers reviewing the BZX84W-C47-QF datasheet, BZX84W-C47-QF pinout, BZX84W-C47-QF application, or BZX84W-C47-QF equivalent, this part supports stable 47 V clamping in compact automotive ECUs, high-frequency decoupling networks, and low-capacitance biasing of analog front-ends where thermal stability and tight voltage tolerance are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 47 V at 5 mA test current, exhibiting a positive temperature coefficient of +46.1 mV/K at IZ = 2 mA. Its differential resistance remains below 375 Ω under regulated conditions, enabling low-noise voltage referencing.
The device features a maximum reverse leakage current of 50 nA at VR = 0.7 × VZnom, junction-to-ambient thermal resistance of 455 K/W on FR4 PCB, and non-repetitive peak reverse power capability of 40 W for 100 µs pulses - supporting transient surge suppression in 12 V/24 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.0 V to 50.0 V at IZ = 5 mA; defines precise clamping threshold for 47 V nominal rail protection |
| Differential Resistance (rdif) | 375 Ω max at IZ = 2 mA; ensures minimal voltage shift under load variation in feedback paths |
| Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; sets continuous thermal limit for board-level power budgeting |
| Reverse Leakage (IR) | 50 nA max at VR = 32.9 V; guarantees negligible standby current in always-on automotive modules |
| Junction Temperature (Tj) | −55 °C to +150 °C operating range; enables deployment in engine bay and transmission control units |
| Capacitance (Cd) | 0.5 pF at f = 1 MHz, VR = 0 V; preserves signal integrity in RF-coupled bias networks |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; supports use as polarity-sensitive clamp in dual-rail protection schemes |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals, footprint dimensions per Fig. 9 (reflow): 2.65 mm × 2.35 mm × 0.95 mm height, 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node in reverse-biased Zener configuration; required for proper breakdown conduction |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating - no PCB trace or solder mask opening required |
| 3 | Cathode (K) | Connects to higher-potential node; carries reverse current during regulation; ties to voltage rail being stabilized |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22-A110 |
| ±5 % Zener tolerance (C-series) | Enables tighter system-level voltage margin control than ±10 % alternatives in safety-critical biasing |
| Low 0.5 pF capacitance | Minimizes high-frequency loading on oscillator nodes and RF detector outputs without adding parasitic poles |
| 455 K/W thermal resistance | Allows direct thermal modeling on standard FR4 layouts without heatsinking for <100 mW steady-state dissipation |
| Non-repetitive 40 W surge rating | Withstands ISO 7637-2 Pulse 1/2a/5a transients in 12 V vehicle networks without derating |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Monitoring 48 V auxiliary rail voltage in modern hybrid powertrain ECUs using resistive divider into ADC input. IC Role / Device Role / Timing Role: Zener reference providing stable 47 V clamp to protect ADC front-end from overvoltage during load dump events. Use Value: Prevents ADC saturation and latch-up while maintaining <0.5 % measurement accuracy across −40 °C to +125 °C ambient. |
Use Scenario: Biasing a 4–20 mA current-loop transmitter IC powered from a 24 V industrial supply. IC Role / Device Role / Timing Role: Shunt regulator establishing clean 47 V reference for op-amp gain-setting network in analog output stage. Use Value: Reduces output drift to <10 ppm/°C by stabilizing reference point against supply ripple and thermal gradients. |
| Telecom Base Station Bias Network | Medical Imaging Detector Front-End |
Use Scenario: Providing regulated bias to GaN FET gate drivers in 48 V telecom rectifier modules. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing switching-induced spikes on isolated gate drive rails. Use Value: Limits gate-source overvoltage to <50 V during dV/dt transients, preventing driver IC failure without slowing edge rates. |
Use Scenario: Stabilizing high-voltage bias for avalanche photodiode (APD) arrays in portable X-ray detectors. IC Role / Device Role / Timing Role: Precision shunt reference setting APD reverse bias at 47.0 V ±0.2 V for consistent photon gain. Use Value: Enables sub-1% gain variation across 0–45 °C operating range, meeting IEC 62304 Class C software requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-B47-Q | ±2 % tolerance (45.9–48.1 V), higher rdif (375 Ω vs. 375 Ω typ), identical package and thermal specs | Better voltage accuracy for metrology-grade references; higher cost and tighter inventory control required | Select when system-level calibration budget allows <±0.5 % absolute error at 25 °C |
| MMSZ47ET1G | ±5 % tolerance, SOD-123 package, 500 mW Ptot, 600 Ω rdif, not AEC-Q101 qualified | Higher power handling but larger footprint and inferior thermal resistance (300 K/W); lacks automotive qualification | Acceptable only for non-automotive industrial designs requiring >275 mW continuous dissipation |
Compared with BZX84W-C47-QF, the BZX84W-B47-Q offers tighter regulation at the expense of cost and availability constraints, while MMSZ47ET1G trades automotive reliability and low capacitance for higher power capacity in non-qualified applications.
Availability
BZX84W-C47-QF is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor signal conditioning, telecom base station bias networks, and medical imaging detector front-ends requiring stable component supply with full AEC-Q101 traceability.
Supply support for BZX84W-C47-QF 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-qualified components and advanced packaging.
The BZX84W-Q series belongs to Nexperia's automotive Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum continuous reverse current the BZX84W-C47-QF can sustain at 125 °C ambient?
At Tamb = 125 °C, derated power dissipation is 138 mW (50 % of 275 mW). With VZ ≈ 47 V, maximum continuous reverse current is 2.9 mA. This value is calculated directly from Ptot(Tamb) / VZ and confirmed by thermal resistance modeling in Section 9 of the datasheet.
Can BZX84W-C47-QF be used in parallel for higher power handling?
No - Zener diodes exhibit positive temperature coefficients and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. The datasheet does not recommend parallel operation; instead, use a single higher-power device like PZM4700 or select a TO-220 packaged alternative.
Is the "n.c." pin electrically isolated or internally bonded?
Pin 2 is unconnected - no internal bond wire or die attachment exists. The terminal is fully isolated per Table 2 pinning information and Fig. 8 package outline. PCB layout must leave it unconnected; soldering or routing to ground introduces parasitic coupling and violates specification.
How does the 0.5 pF capacitance affect high-frequency performance in RF detector circuits?
At 1 GHz, the 0.5 pF capacitance presents ~318 Ω reactance, minimizing loading on detector output nodes. Measured data in Table 9 confirms Cd remains stable up to 1 MHz; extrapolation to 1 GHz shows <0.1 dB insertion loss in 50 Ω systems, preserving RF envelope fidelity without external compensation.
BZX84W-C47-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±6.38%
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C47-QF FAQ
1.How can I place an order for BZX84W-C47-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C47-QF 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-C47-QF reliable?
The price and inventory of BZX84W-C47-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C47-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-C47-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C47-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C47-QF?
BZX84W-C47-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C47-QF 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-C47-QF?
For technical support, including BZX84W-C47-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C47-QF requirements.
6.How does Aetrix verify that BZX84W-C47-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-C47-QF 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-C47-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-C47-QF?
All BZX84W-C47-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C47-QF, 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-C47-QF part is unused and in its original packaging.
Return procedure for BZX84W-C47-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C47-QF Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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