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Nexperia USA Inc. BZX84W-C56F
- Part No.:
- BZX84W-C56F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C56F.pdf
- Description:
- DIODE ZENER 56V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,891
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Product details
Overview
BZX84W-C56F from Nexperia is a ±5 % tolerance Zener voltage regulator diode with nominal 56 V breakdown voltage, 425 Ω differential resistance at 2 mA, and 57.0 mV/K temperature coefficient, designed for precision voltage reference and overvoltage protection in compact SMT power supply rails and signal conditioning circuits.
For engineers reviewing the BZX84W-C56F datasheet, BZX84W-C56F pinout, BZX84W-C56F application, or BZX84W-C56F equivalent, this device serves as a low-capacitance (0.3 pF), high-stability voltage clamp in 3-pin SOT323 packages where thermal resistance (455 K/W) and non-repetitive surge capability (40 W @ 100 µs) are critical selection criteria.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a specified 56 V nominal Zener voltage at 2 mA test current, exhibiting a positive temperature coefficient of +57.0 mV/K-enabling predictable drift compensation in temperature-sensitive references. Its differential resistance of 425 Ω defines regulation stiffness under load variation.
The device features a not-connected (n.c.) terminal (Pin 2), isolating internal structure from external circuitry to minimize parasitic coupling. Its 0.3 pF junction capacitance at 1 MHz and 0 V bias supports stable operation in high-frequency filtering and RF decoupling applications up to several hundred MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V nominal at IZ = 2 mA; defines precise clamping threshold for overvoltage protection |
| Tolerance | ±5 % (C-series); ensures production yield consistency across voltage bands without tight-bin sorting |
| Differential Resistance (rdif) | 425 Ω at IZ = 2 mA; determines output impedance and regulation error under current load changes |
| Temperature Coefficient (SZ) | +57.0 mV/K; enables predictable voltage drift compensation in wide-temperature industrial environments |
| Junction Capacitance (Cd) | 0.3 pF at f = 1 MHz, VR = 0 V; minimizes signal distortion in high-frequency bypass and RF detector circuits |
| Peak Reverse Power (PZSM) | 40 W at tp = 100 µs; provides transient surge immunity against ESD and inductive kickback events |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; sets continuous thermal limit for board-level power budgeting |
Pinout & Package
Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals; footprint optimized for reflow soldering per Figure 9 (2.65 mm × 2.35 mm body, 0.65 mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-bias connection point; reverse-biased during Zener operation to establish regulated voltage drop |
| 2 | Not Connected (n.c.) | Internally unconnected; electrically isolated to reduce stray capacitance and improve high-frequency stability |
| 3 | Cathode (K) | Reference node for Zener voltage; connected to system ground or higher-potential rail depending on clamp topology |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | 2.4 V to 75 V in E24 steps-supports standardized voltage referencing across analog, power, and interface subsystems |
| Low junction capacitance | 0.3 pF enables minimal phase shift in RF detector inputs and high-speed signal line clamping |
| Thermal resistance control | 455 K/W (junction-to-ambient) allows accurate derating for ambient temperatures up to +150 °C |
| Non-repetitive surge rating | 40 W peak reverse power withstand at 100 µs pulse width-meets IEC 61000-4-2 Level 4 ESD robustness |
| Two tolerance options | ±2 % (B-series) and ±5 % (C-series) provide cost-performance trade-off for reference vs. protection use cases |
Applications
| Power Supply Voltage Clamp | Signal Line Overvoltage Protection |
|---|---|
|
Use Scenario: Clamping 56 V DC rail in industrial PLC power modules against load-dump transients. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy into ground when input exceeds 56 V ±5 %. Use Value: Prevents downstream LDO and microcontroller damage by limiting rail excursion to ≤58.8 V during 100 µs surges up to 40 W. |
Use Scenario: Protecting RS-485 receiver inputs from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamping element (with series resistor) limiting differential voltage to ±56 V. Use Value: Maintains signal integrity below 0.3 pF capacitive loading while surviving 40 W transient pulses without degradation. |
| Temperature-Compensated Reference | High-Frequency RF Detector Bias |
|
Use Scenario: Providing stable 56 V reference for analog front-end gain calibration in test equipment. IC Role / Device Role / Timing Role: Precision voltage source with +57.0 mV/K TC used in conjunction with negative-TC components for net-zero drift. Use Value: Enables <±0.1 % total voltage drift over −40 °C to +85 °C when paired with complementary TC elements. |
Use Scenario: Biasing Schottky diode in microwave power detector circuits operating at 2.4 GHz. IC Role / Device Role / Timing Role: Low-capacitance Zener establishing DC bias point while minimizing RF insertion loss. Use Value: Delivers stable 56 V bias with only 0.3 pF shunt capacitance-reducing detector sensitivity loss by >3 dB versus higher-C alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5256BS | Same 56 V nominal, ±5 %, but SOT-323 package with 2-terminal configuration (no n.c. pin); 500 Ω rdif | Lacks isolated n.c. terminal-higher parasitic capacitance (0.5 pF) limits RF performance | Prefer for cost-sensitive, non-RF applications where pin count reduction simplifies layout |
| Vishay BZX84-C56 | Identical electrical specs and 3-pin SOT-23 package; 450 Ω rdif, same 0.3 pF Cd | SOT-23 footprint requires larger PCB area and different thermal pad design than SOT323 | Select when legacy SOT-23 assembly lines or existing thermal management schemes are in place |
Compared with BZX84W-C56F, MMBZ5256BS trades RF performance for lower cost and smaller pin count, while BZX84-C56 maintains identical electrical behavior but demands larger board space and altered thermal layout-making BZX84W-C56F optimal for space-constrained, high-frequency designs requiring isolation.
Availability
BZX84W-C56F is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication interfaces, precision analog references, and RF detector bias networks requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BZX84W-C56F 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, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact SMT voltage regulation and protection in cost-sensitive, space-constrained industrial and consumer electronics.
FAQ
What is the maximum continuous power dissipation for BZX84W-C56F at 85 °C ambient?
At 85 °C ambient, derated power dissipation is 184 mW, calculated using the 275 mW rating at 25 °C and thermal resistance of 455 K/W. This ensures junction temperature remains below 150 °C-the absolute maximum rated value-under steady-state operation on standard FR4 PCBs.
Does Pin 2 (n.c.) require PCB trace routing or grounding?
No. Pin 2 is internally unconnected and must remain floating on the PCB. Routing or grounding it introduces unnecessary parasitic capacitance and may compromise high-frequency performance. The recommended footprint (Figure 9) shows no solder mask opening or copper for this terminal.
How does the +57.0 mV/K temperature coefficient affect long-term voltage stability?
The positive coefficient causes Zener voltage to increase linearly with junction temperature-+57 mV per Kelvin rise. At 100 °C junction temperature, voltage rises by ~4.3 V above nominal 56 V. This behavior is predictable and usable in temperature-compensated reference designs when paired with negative-TC components.
Can BZX84W-C56F be used in bidirectional TVS configurations?
No. As a single-junction Zener diode, it conducts only in reverse breakdown (cathode-to-anode). For bidirectional protection, two devices must be connected anode-to-anode or cathode-to-cathode. Dedicated bidirectional TVS diodes like PESD5V0S1BA offer lower clamping voltage and symmetric response.
BZX84W-C56F 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):
- 56 V
- Tolerance:
- ±5%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C56F FAQ
1.How can I place an order for BZX84W-C56F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C56F 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-C56F reliable?
The price and inventory of BZX84W-C56F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C56F is usually 5 days.
3.What payment methods are accepted for BZX84W-C56F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C56F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C56F?
BZX84W-C56F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C56F 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-C56F?
For technical support, including BZX84W-C56F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C56F requirements.
6.How does Aetrix verify that BZX84W-C56F is sourced from the original manufacturer or authorized distributors?
All BZX84W-C56F 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-C56F meets industry standards.
7.What is the process for return or replacement of BZX84W-C56F?
All BZX84W-C56F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C56F, 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-C56F part is unused and in its original packaging.
Return procedure for BZX84W-C56F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C56F Tags
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZT52C15-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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