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Nexperia USA Inc. BZX84W-C11F
- Part No.:
- BZX84W-C11F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C11F.pdf
- Description:
- DIODE ZENER 11V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,033
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Product details
Overview
BZX84W-C11F from Nexperia is a ±5 % tolerance Zener voltage regulator diode with a nominal 11 V breakdown voltage, 150 Ω differential resistance at 5 mA, and 7.4 mV/K temperature coefficient, housed in an SOT323 (SC-70) package for space-constrained power rail stabilization in consumer and industrial DC-DC feedback networks.
For engineers reviewing the BZX84W-C11F datasheet, BZX84W-C11F pinout, BZX84W-C11F application, or BZX84W-C11F equivalent, key selection criteria include Zener voltage tolerance, thermal coefficient stability over temperature, low capacitance (2.5 pF), junction-to-ambient thermal resistance (455 K/W), and non-repetitive surge capability (40 W).
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 11 V nominal Zener voltage is specified at IZ = 5 mA with ±5 % tolerance and exhibits a positive temperature coefficient of +7.4 mV/K, indicating voltage increases with rising junction temperature.
The device delivers 275 mW total power dissipation on FR4 PCB with single-sided copper, supports 200 mA forward current, and features low 2.5 pF junction capacitance at 1 MHz and 0 V bias-enabling use in high-frequency regulation and noise-sensitive analog reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal at IZ = 5 mA; defines precise DC reference point for feedback loops |
| Tolerance | ±5 % (C-series); ensures predictable voltage deviation across production lots |
| Differential Resistance (rdif) | 150 Ω max at IZ = 5 mA; determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +7.4 mV/K at IZ = 5 mA; quantifies voltage drift per degree Celsius rise in junction temperature |
| Junction Capacitance (Cd) | 2.5 pF at f = 1 MHz, VR = 0 V; enables minimal signal coupling in high-frequency applications |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on standard FR4; sets maximum continuous DC power handling |
| Reverse Current (IR) | 100 nA max at VR = 8 V; defines leakage level critical for low-power standby circuits |
Pinout & Package
Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals, footprint dimensions 2.2 mm × 1.35 mm × 0.95 mm (L × W × H), optimized for automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-bias terminal; connects to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask required |
| 3 | Cathode (K) | Reverse-bias terminal; connects to higher-potential node and regulates voltage at cathode-to-anode drop |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | 2.4 V to 75 V in E24 steps-supports universal reference design across multiple supply rails |
| Low junction capacitance | 2.5 pF at 1 MHz-minimizes high-frequency signal distortion in RF and switching regulator feedback paths |
| Controlled temperature coefficient | +7.4 mV/K at 11 V-enables predictable voltage shift compensation in thermally varying environments |
| High surge robustness | 40 W non-repetitive peak reverse power (tp = 100 µs)-withstands transient overvoltage events without degradation |
| Standardized SOT323 footprint | Compatible with JEDEC SC-70 land pattern-ensures drop-in replacement and process compatibility in high-volume SMT lines |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-boost DC-DC converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener diode provides precise 11 V reference at secondary-side error amplifier input to regulate primary-side PWM duty cycle. Use Value: ±5 % tolerance and +7.4 mV/K coefficient allow stable regulation within ±2 % over −40 °C to +125 °C ambient range. |
Use Scenario: Protecting microcontroller I/O pins from ESD-induced transients on 12 V automotive accessory lines. IC Role / Device Role / Timing Role: Acts as shunt clamp between signal line and ground, conducting when voltage exceeds 11 V + forward drop. Use Value: 40 W non-repetitive surge rating absorbs 1 kV/50 Ω contact discharge pulses without failure. |
| Low-Power Sensor Biasing | Reference Voltage Generator |
|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Supplies regulated 11 V bias to RTD bridge while drawing <100 nA leakage at 8 V reverse bias. Use Value: 2.5 pF capacitance prevents high-frequency noise coupling into precision analog measurement path. |
Use Scenario: Generating fixed 11 V reference for ADC voltage scaling in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Functions as passive voltage reference in ratiometric circuit with precision resistor divider. Use Value: 150 Ω differential resistance ensures <0.1 % error contribution under 100 µA load current variation. |
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 MMBZ5240BLT1G | 10 V nominal, ±5 %, 17 Ω rdif, −2.5 mV/K SZ | Lower voltage and negative tempco; better for low-voltage, temp-stable references | Select when 10 V reference and tighter regulation (lower rdif) outweigh need for 11 V match |
| Vishay BZX84-C11-TP | 11 V nominal, ±5 %, 150 Ω rdif, +7.4 mV/K SZ, same SOT323 package | Identical electrical specs and footprint; differs only in marking and traceability | Drop-in alternative with identical performance-preferred where Vishay sourcing or dual-sourcing is required |
Compared with BZX84W-C11F, MMBZ5240BLT1G offers lower dynamic impedance but requires system-level recalibration for 10 V operation, while BZX84-C11-TP delivers identical regulation behavior with alternate supply-chain assurance.
Availability
BZX84W-C11F is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-power sensor biasing requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for BZX84W-C11F 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-effective voltage regulation and clamping in space-constrained surface-mount applications.
FAQ
What is the maximum reverse voltage before breakdown for BZX84W-C11F?
The BZX84W-C11F has a nominal Zener voltage of 11 V at 5 mA test current, with guaranteed minimum and maximum values of 10.4 V and 11.6 V respectively under ±5 % tolerance. Breakdown occurs within this band and is not defined by a single "maximum reverse voltage" threshold-it is a controlled, graded conduction onset.
Can BZX84W-C11F be used in place of a 12 V Zener diode?
No-BZX84W-C11F is specifically rated for 11 V nominal breakdown and cannot substitute for a 12 V Zener without violating regulation accuracy. The BZX84W-C12 variant (12 V, ±5 %, 150 Ω rdif, +8.4 mV/K) is the correct part for 12 V applications and shares identical package and thermal characteristics.
Is pin 2 electrically functional or a mechanical dummy lead?
Pin 2 is explicitly marked "n.c." (not connected) in Nexperia's official pinning diagram and internal construction. It is a mechanical dummy lead with no internal bond wire or semiconductor connection-must remain unconnected on PCB layout to avoid unintended parasitic coupling or solder bridging.
How does thermal resistance affect derating of BZX84W-C11F at elevated ambient temperatures?
With Rth(j-a) = 455 K/W, power dissipation must be linearly derated above 25 °C ambient: Ptot(Tamb) = 275 mW × (1 − (Tamb − 25)/125). At 100 °C ambient, maximum allowable power drops to 165 mW to maintain Tj ≤ 150 °C junction limit.
BZX84W-C11F 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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-C11F FAQ
1.How can I place an order for BZX84W-C11F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C11F 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-C11F reliable?
The price and inventory of BZX84W-C11F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C11F is usually 5 days.
3.What payment methods are accepted for BZX84W-C11F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C11F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C11F?
BZX84W-C11F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C11F 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-C11F?
For technical support, including BZX84W-C11F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C11F requirements.
6.How does Aetrix verify that BZX84W-C11F is sourced from the original manufacturer or authorized distributors?
All BZX84W-C11F 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-C11F meets industry standards.
7.What is the process for return or replacement of BZX84W-C11F?
All BZX84W-C11F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C11F, 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-C11F part is unused and in its original packaging.
Return procedure for BZX84W-C11F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C11F Tags
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