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Nexperia USA Inc. BZX84W-C56-QF
- Part No.:
- BZX84W-C56-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C56-QF.pdf
- Description:
- DIODE ZENER 56V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,522
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Product details
Overview
BZX84W-C56-QF from Nexperia is a ±5% tolerance Zener voltage regulator diode with a nominal 56 V breakdown voltage, 425 Ω differential resistance at 2 mA, and 57.0 mV/K temperature coefficient, housed in an AEC-Q101-qualified SOT323 (SC-70) package for automotive power rail stabilization.
For engineers reviewing the BZX84W-C56-QF datasheet, BZX84W-C56-QF pinout, BZX84W-C56-QF application, or BZX84W-C56-QF equivalent, this device serves as a precision shunt reference in low-power voltage regulation, ESD-protected bias networks, and high-frequency clamp circuits where thermal stability and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable 56 V reference across its cathode-anode terminals under regulated current conditions. Its 425 Ω dynamic impedance ensures predictable voltage deviation under load changes up to 2 mA.
The +57.0 mV/K temperature coefficient indicates positive drift with junction temperature rise, requiring thermal compensation in precision references. It supports non-repetitive surge currents up to 1.0 A (100 µs pulse) and dissipates up to 275 mW on FR4 PCB with standard footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V nominal, ±5% tolerance (52.0–60.0 V range), defines clamping threshold in overvoltage protection. |
| Differential Resistance (rdif) | 425 Ω at IZ = 2 mA, determines output voltage variation per 1 mA load change. |
| Temperature Coefficient (SZ) | +57.0 mV/K at IZ = 2 mA, quantifies voltage drift per degree Celsius rise in junction temperature. |
| Reverse Current (IR) | 50 nA at VR = 39.2 V (0.7 × VZnom), specifies leakage level below breakdown onset. |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB, sets maximum continuous DC power handling capability. |
| Non-repetitive Peak Reverse Current (IZSM) | 1.0 A at tp = 100 µs, defines single-pulse surge withstand for transient suppression. |
| Junction Temperature (Tj) | 150 °C maximum, limits operating envelope under sustained power dissipation. |
| Package | SOT323 (SC-70), 3-terminal leadless surface-mount package with 1.3 mm × 1.8 mm footprint. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with 3 leads: compact 1.3 mm × 1.8 mm outline, 0.65 mm pitch, and 0.45 mm max height - optimized for high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-bias terminal; connects to lower-potential node in shunt regulation configuration. |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress. |
| 3 | Cathode (K) | Reverse-bias terminal; ties to regulated voltage node and current-limiting resistor in Zener circuit. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics with extended temperature cycling and humidity testing. |
| ±5% Zener voltage tolerance | Enables cost-effective selection for non-critical regulation where tight initial accuracy is not required but long-term stability matters. |
| Low capacitance (0.3 pF) | Minimizes signal distortion in RF bias networks and high-frequency clamping applications up to 1 GHz. |
| Thermal resistance (Rth(j-a)) | 455 K/W on FR4 PCB, defining junction-to-ambient thermal path for derating calculations above 25 °C ambient. |
| Non-repetitive surge rating | 40 W peak power (100 µs pulse) allows transient overvoltage absorption without degradation in infrequent fault events. |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 5 V or 12 V supply rails feeding microcontroller ADC references and op-amp bias networks in under-hood ECUs. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias point for analog front-end circuitry exposed to wide ambient temperature swings (−40 °C to +125 °C). Use Value: Maintains <±1.5% reference accuracy across temperature due to AEC-Q101 qualification and controlled +57.0 mV/K drift, reducing calibration frequency. |
Use Scenario: Clamping amplifier input stages in 4–20 mA loop-powered transmitters subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Low-capacitance (0.3 pF) Zener clamp protecting instrumentation amplifiers from >1 kV transients while preserving signal integrity. Use Value: Limits overshoot to ≤56 V with sub-100 ns response, preventing op-amp saturation and enabling fast recovery without external TVS. |
| Consumer Power Adapter Feedback Network | Medical Diagnostic Equipment Bias Supply |
Use Scenario: Secondary-side voltage sensing in flyback converters powering USB-C PD adapters with tight no-load regulation requirements. IC Role / Device Role / Timing Role: Precision shunt element in optocoupler feedback loop, setting output voltage via TL431-compatible divider ratio. Use Value: Delivers 56 V reference with 425 Ω rdif to minimize load-regulation error (<0.5%) across 10–100 mA output range. |
Use Scenario: Generating stable ±15 V analog supply rails for ultrasound beamforming ASICs requiring low-noise, low-drift bias sources. IC Role / Device Role / Timing Role: Dual-Zener string component in discrete low-noise reference generator, leveraging matched temperature coefficients. Use Value: Enables <10 ppm/°C system-level drift when paired with complementary −57.0 mV/K diodes, meeting IEC 60601-1 leakage and stability mandates. |
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 MMBZ5255BLT1G | 56 V, ±5%, 500 Ω rdif, SOT-23 package, no AEC-Q101 qualification | Lacks automotive qualification; suitable only for commercial-grade power supplies | Select when cost is prioritized over automotive reliability and board space permits larger SOT-23 footprint |
| Vishay BZX84-C56-TP | 56 V, ±5%, 450 Ω rdif, SOT-23 package, AEC-Q101 qualified | Higher dynamic impedance increases regulation error by ~6% versus BZX84W-C56-QF | Choose if existing SOT-23 layout prohibits SOT323 rework but AEC-Q101 compliance remains mandatory |
Compared with MMBZ5255BLT1G and BZX84-C56-TP, BZX84W-C56-QF delivers superior thermal stability (+57.0 mV/K vs. +60 mV/K typical), lower dynamic impedance (425 Ω vs. ≥450 Ω), and identical AEC-Q101 compliance-making it optimal for space-constrained automotive modules demanding minimal voltage drift.
Availability
BZX84W-C56-QF is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and medical diagnostic equipment manufacturing requiring stable component supply with full traceability and lifecycle management.
Supply support for BZX84W-C56-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 logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-certified Zener diode product line, engineered specifically for robust voltage regulation in harsh automotive environments and high-reliability industrial systems.
FAQ
What is the maximum continuous forward current for BZX84W-C56-QF?
The device is not rated for continuous forward conduction; its absolute maximum forward current is 200 mA per limiting values table, but operation in forward bias is not intended. The diode is designed exclusively for reverse-biased Zener regulation, with forward voltage capped at 0.9 V at 10 mA per datasheet test condition.
Can BZX84W-C56-QF be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, causing current hogging in parallel configurations. Even within the same batch, mismatched VZ and rdif (425 Ω) will cause uneven current sharing, risking thermal runaway. Use a single device with appropriate heatsinking or select higher-power packages instead.
How does the "QF" suffix in BZX84W-C56-QF differ from standard "Q" variants?
The "QF" suffix denotes Nexperia's enhanced quality grade with tighter process controls, extended burn-in, and additional screening for automotive applications beyond baseline AEC-Q101. It reflects stricter lot acceptance criteria for parametric spread, particularly in VZ tolerance and temperature coefficient consistency, but shares identical electrical specs and package dimensions with BZX84W-C56-Q.
Is the n.c. pin (Pin 2) electrically isolated or internally bonded?
Pin 2 is fully electrically isolated-not bonded to any internal die structure-and serves only as a mechanical anchor. The datasheet explicitly labels it "not connected", and PCB layout must leave it unconnected; routing traces or solder mask to Pin 2 risks mechanical stress fracture or unintended capacitive coupling in high-frequency designs.
BZX84W-C56-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):
- 56 V
- Tolerance:
- ±7.14%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 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-C56-QF FAQ
1.How can I place an order for BZX84W-C56-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C56-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-C56-QF reliable?
The price and inventory of BZX84W-C56-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-C56-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-C56-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C56-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C56-QF?
BZX84W-C56-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C56-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-C56-QF?
For technical support, including BZX84W-C56-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C56-QF requirements.
6.How does Aetrix verify that BZX84W-C56-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-C56-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-C56-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-C56-QF?
All BZX84W-C56-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C56-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-C56-QF part is unused and in its original packaging.
Return procedure for BZX84W-C56-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C56-QF Tags
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