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Nexperia USA Inc. BZX84W-C75F
- Part No.:
- BZX84W-C75F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C75F.pdf
- Description:
- DIODE ZENER 75V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,989
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Product details
Overview
BZX84W-C75F from Nexperia is a ±5 % tolerance Zener voltage regulator diode with a nominal 75 V breakdown voltage, 275 mW power dissipation, and SOT323 (SC-70) surface-mount package. It operates as a precision shunt reference in low-power voltage regulation and overvoltage protection circuits, supporting stable DC biasing in high-frequency signal conditioning stages.
For engineers reviewing the BZX84W-C75F datasheet, BZX84W-C75F pinout, BZX84W-C75F application, or BZX84W-C75F equivalent, this part is selected for 75 V clamping in sensor interface front-ends, ESD-tolerant power rail supervision, and compact voltage reference design where thermal resistance (455 K/W) and low capacitance (0.2 pF at 1 MHz) are critical.
Technical Context
This Zener diode functions in reverse-biased breakdown mode with a specified 75 V nominal Zener voltage at IZ = 2 mA and ±5 % tolerance. Its differential resistance is 500 Ω at IZ = 2 mA, and temperature coefficient is +80.2 mV/K - indicating strong positive voltage drift with junction temperature rise.
It delivers non-repetitive peak reverse power dissipation up to 40 W for 100 µs pulses and maintains operation across −55 °C to +150 °C ambient range. The device exhibits 50 nA maximum reverse current at VR = 0.7 × VZnom, confirming tight leakage control for standby-sensitive designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 75 V nominal at IZ = 2 mA; defines precise clamping threshold for overvoltage protection |
| Tolerance | ±5 % (C-series); sets worst-case regulation window of 70.0–79.0 V under production variation |
| Power Dissipation Ptot | 275 mW at Tamb = 25 °C on FR4 PCB; limits continuous DC power handling in compact layouts |
| Differential Resistance rdif | 500 Ω at IZ = 2 mA; determines output impedance and load regulation sensitivity |
| Reverse Current IR | 50 nA max at VR = 52.5 V (0.7 × VZnom); ensures minimal quiescent current in standby mode |
| Junction-to-Ambient Rth(j-a) | 455 K/W in free air on standard FR4; governs thermal rise under sustained power dissipation |
| Capacitance Cd | 0.2 pF at f = 1 MHz, VR = 0 V; enables use in RF-coupled or high-speed transient suppression |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, tin-plated terminations compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Electrically isolated terminal; no internal bond wire or die connection; must remain unconnected |
| 3 | Cathode (K) | Reverse-bias terminal; tied to regulated voltage node or protection clamp point in circuit |
Key Features
| Feature | Design Value |
|---|---|
| 75 V Zener voltage with ±5 % tolerance | Enables accurate overvoltage cutoff in 72–80 V industrial power rails without external trimming |
| 0.2 pF junction capacitance at 1 MHz | Minimizes signal distortion in RF detector bias networks and high-frequency feedback paths |
| 455 K/W thermal resistance | Permits direct mounting on standard FR4 without thermal vias in low-duty-cycle surge applications |
| Non-repetitive 40 W pulse rating | Supports transient suppression of 100 µs surges up to ±1.8 A without degradation |
| −55 °C to +150 °C operating range | Validates use in automotive under-hood modules and industrial motor drive control boards |
Applications
| Industrial Sensor Biasing | RS-485 Transceiver Protection |
|---|---|
|
Use Scenario: Providing stable 75 V reference for analog front-end gain-setting resistors in pressure transducers exposed to 72 V supply rails. IC Role / Device Role / Timing Role: Shunt voltage reference and overvoltage clamp during load-dump transients. Use Value: Maintains <1 % gain error across temperature while limiting fault energy to <10 mJ per event. |
Use Scenario: Clamping common-mode voltage excursions on RS-485 bus lines subjected to ±75 V lightning-induced surges. IC Role / Device Role / Timing Role: Fast-acting bidirectional transient suppressor on receiver input nodes. Use Value: Limits bus voltage swing to within ±79 V (max) without adding >0.2 pF parasitic capacitance to data path. |
| Programmable Logic Controller (PLC) Input Conditioning | DC-DC Converter Feedback Reference |
|
Use Scenario: Regulating 75 V auxiliary supply for optocoupler drivers in 24/48/72 V PLC backplane interfaces. IC Role / Device Role / Timing Role: Low-power shunt regulator stabilizing isolated bias rail. Use Value: Draws only 50 nA leakage at 52.5 V, enabling >10-year shelf life in battery-backed modules. |
Use Scenario: Setting upper threshold in adjustable flyback converter feedback divider for 75 V output regulation. IC Role / Device Role / Timing Role: Precision Zener reference replacing TL431 in high-voltage secondary-side sensing. Use Value: Delivers 75 V ±3.75 V accuracy without external op-amp compensation or temperature calibration. |
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 MMBZ5270BLT1G | 75 V, ±5 %, 225 mW Ptot, 600 Ω rdif, 0.5 pF Cd | Higher capacitance and lower power limit reduce suitability for RF-coupled clamping | Select when legacy ON Semi footprint compatibility is required and thermal margin >100 K/W is acceptable |
| Vishay BZX84-C75-TP | 75 V, ±5 %, 300 mW Ptot, 450 Ω rdif, 0.25 pF Cd, same SOT323 package | Marginally higher power rating but 25 % greater junction capacitance affects >100 MHz performance | Prefer for higher continuous power needs where sub-0.25 pF capacitance is not mandatory |
Compared with MMBZ5270BLT1G and BZX84-C75-TP, BZX84W-C75F offers the lowest junction capacitance (0.2 pF) and best thermal resistance (455 K/W) among SOT323 75 V Zeners, making it optimal for high-frequency, thermally constrained, and low-leakage applications.
Availability
BZX84W-C75F is available at Aetrix Electronics and suitable for industrial sensor biasing, RS-485 bus protection, and PLC input conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZX84W-C75F 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 and industrial-grade components.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for stable voltage regulation and transient suppression in space-constrained, high-frequency, and wide-temperature industrial applications.
FAQ
What is the maximum reverse current specification for BZX84W-C75F at 52.5 V?
The maximum reverse current (IR) is 50 nA at VR = 52.5 V (0.7 × VZnom), measured at Tj = 25 °C with pulse conditions tp ≤ 300 µs and duty cycle δ ≤ 0.02. This value confirms ultra-low leakage for battery-powered or high-impedance bias networks.
Can BZX84W-C75F be used in place of a 75 V Zener diode in a linear regulator feedback loop?
Yes - its 75 V nominal Zener voltage, ±5 % tolerance, and 500 Ω differential resistance enable direct substitution in shunt-regulated feedback dividers. However, ensure the cathode connects to the regulated node and anode to ground or lower potential, with sufficient series resistance to limit IZ to 2–10 mA for stable operation.
Is the "n.c." pin on BZX84W-C75F electrically isolated or internally bonded?
Pin 2 is explicitly designated "not connected" in Nexperia's pinning documentation and has no internal die connection. It must remain unconnected in layout and routing; soldering or tying it to any net may cause mechanical stress or unintended coupling due to proximity to active terminals.
How does the +80.2 mV/K temperature coefficient affect long-term voltage stability?
The positive temperature coefficient means VZ increases by ~80.2 mV per Kelvin rise in junction temperature. At 100 °C junction temperature (75 °C above 25 °C reference), VZ rises ~6 V - resulting in ~7.5 % deviation from nominal. Designers must account for this drift in precision references or implement thermal derating in high-power applications.
BZX84W-C75F 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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.2 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-C75F FAQ
1.How can I place an order for BZX84W-C75F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C75F 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-C75F reliable?
The price and inventory of BZX84W-C75F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C75F is usually 5 days.
3.What payment methods are accepted for BZX84W-C75F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C75F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C75F?
BZX84W-C75F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C75F 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-C75F?
For technical support, including BZX84W-C75F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C75F requirements.
6.How does Aetrix verify that BZX84W-C75F is sourced from the original manufacturer or authorized distributors?
All BZX84W-C75F 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-C75F meets industry standards.
7.What is the process for return or replacement of BZX84W-C75F?
All BZX84W-C75F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C75F, 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-C75F part is unused and in its original packaging.
Return procedure for BZX84W-C75F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C75F Tags
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