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Nexperia USA Inc. BZX84W-C12F
- Part No.:
- BZX84W-C12F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C12F.pdf
- Description:
- DIODE ZENER 12V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,775
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Product details
Overview
BZX84W-C12F from Nexperia is a ±5 % tolerance Zener voltage regulator diode with nominal 12 V breakdown voltage, 150 Ω differential resistance at 5 mA, and 8.4 mV/K temperature coefficient, designed for precision voltage reference and clamping in low-power analog circuits and power supply feedback paths.
For engineers reviewing the BZX84W-C12F datasheet, BZX84W-C12F pinout, BZX84W-C12F application, or BZX84W-C12F equivalent, this device supports stable regulation in space-constrained SMT designs requiring tight voltage accuracy, low leakage (100 nA at 8 V), and high-frequency stability up to 2.5 pF capacitance.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a specified 12 V nominal Zener voltage at 5 mA test current and exhibits a positive temperature coefficient of +8.4 mV/K, indicating increasing breakdown voltage with junction temperature rise. Its differential resistance of 150 Ω defines regulation stiffness under varying load currents.
The device uses a planar epitaxial construction in a leadless SOT323 package, enabling low parasitic inductance and capacitance (2.5 pF at 1 MHz, 0 V bias) suitable for high-frequency noise suppression and transient clamping applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V nominal at IZ = 5 mA; defines precise DC reference point for feedback or clamping |
| Tolerance | ±5 % (C-series); ensures voltage accuracy within 11.4–12.6 V across production lot |
| Differential Resistance (rdif) | 150 Ω at IZ = 5 mA; determines output impedance and load regulation error |
| Temperature Coefficient (SZ) | +8.4 mV/K at IZ = 5 mA; quantifies drift rate of VZ with junction temperature change |
| Reverse Leakage (IR) | 100 nA at VR = 8 V; critical for low-power standby circuits and high-impedance nodes |
| Capacitance (Cd) | 2.5 pF at f = 1 MHz, VR = 0 V; enables effective RF bypass and ESD transient filtering |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; sets maximum continuous DC power handling capability |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: ultra-compact 3-terminal leadless design with 0.65 mm pitch, optimized for automated reflow assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener operation (reverse-biased cathode-to-anode) |
| 2 | Not Connected (n.c.) | Internally unconnected; electrically isolated and must not be soldered to any trace or plane |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node to enable Zener conduction and voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | 2.4 V to 75 V in E24 steps; supports standardized reference selection across diverse supply rails |
| Low dynamic impedance | 150 Ω typical at 5 mA; improves regulation accuracy under varying load conditions |
| High-frequency response | 2.5 pF junction capacitance; minimizes signal distortion in RF coupling and clamping |
| Stable temperature behavior | +8.4 mV/K coefficient at 12 V; enables predictable drift compensation in thermal-aware designs |
| Low leakage current | 100 nA at 8 V reverse bias; preserves battery life and avoids loading in high-impedance sensor interfaces |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
|
Use Scenario: Regulating output voltage of a buck converter using TL431-like feedback topology with resistor divider. IC Role / Device Role / Timing Role: Provides stable 12 V reference point for error amplifier comparison; replaces bulkier discrete references. Use Value: Enables ±5 % output accuracy over temperature without trimming, leveraging 150 Ω rdif to minimize load-induced error. |
Use Scenario: Protecting microcontroller GPIO pins from 15 V transients induced by relay coil flyback. IC Role / Device Role / Timing Role: Acts as fast-acting shunt clamp; conducts when input exceeds 12 V + forward drop. Use Value: Limits peak voltage to ≤12.9 V with <100 ns response, supported by 2.5 pF Cd and low rdif. |
| Low-Power Sensor Biasing | RF Signal Level Detection |
|
Use Scenario: Providing bias voltage to a MEMS pressure sensor operating from a 3.3 V rail with internal 12 V reference requirement. IC Role / Device Role / Timing Role: Functions as passive voltage translator via resistor-Zener network; supplies regulated 12 V from boosted intermediate rail. Use Value: Delivers stable 12 V with only 100 nA leakage, avoiding quiescent current penalty in battery-powered IoT nodes. |
Use Scenario: Peak-detecting RF envelope in 2.4 GHz ISM-band receiver front-end before baseband amplification. IC Role / Device Role / Timing Role: Serves as low-capacitance AC-coupled detector diode; rectifies RF signal while minimizing harmonic distortion. Use Value: 2.5 pF capacitance and 0.9 V forward drop preserve signal integrity up to 100 MHz, validated per Fig. 2–5. |
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 MMBZ5242B | 12 V, ±5 %, 170 Ω rdif, 9.0 mV/K SZ, SOT-23 package | Higher rdif and SZ; less stable under thermal variation | Acceptable where board area allows larger SOT-23 footprint and tighter regulation is not required |
| Vishay BZX84-C12 | 12 V, ±5 %, 150 Ω rdif, 8.4 mV/K SZ, same SOT323 but non-W series | Identical electrical specs but rated for 350 mW Ptot vs. 275 mW; different thermal derating curve | Preferred for higher-power dissipation needs; verify PCB copper area matches Vishay's thermal model |
Compared with BZX84W-C12F, MMBZ5242B trades regulation precision for legacy SOT-23 compatibility, while BZX84-C12 offers identical Zener performance with higher power headroom-making it suitable for thermally constrained layouts needing margin.
Availability
BZX84W-C12F 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 SOT323 footprint compatibility.
Supply support for BZX84W-C12F 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade robustness.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation and clamping in space-constrained consumer, industrial, and communication equipment.
FAQ
What is the maximum reverse voltage that BZX84W-C12F can withstand before breakdown?
The BZX84W-C12F has a nominal Zener voltage of 12 V at 5 mA test current, with guaranteed minimum and maximum values of 11.4 V and 12.7 V respectively. It begins controlled reverse conduction within this band and is not rated for sustained operation above its absolute maximum reverse voltage of 12.7 V without current limiting.
Can BZX84W-C12F be used in place of a 12 V Zener diode with ±2 % tolerance?
No-BZX84W-C12F is specifically a ±5 % tolerance part (denoted by 'C' in the type number). The ±2 % variant is BZX84W-B12, which has tighter 11.8–12.2 V tolerance and different differential resistance (150 Ω vs. 125 Ω). Substitution requires verification of system-level voltage margin and regulation stiffness requirements.
How does the not-connected (n.c.) pin affect PCB layout and soldering?
Pin 2 is internally unconnected and must remain electrically isolated. PCB footprints must omit solder mask and paste from this pad to prevent bridging or unintended thermal coupling. Standard SOT323 reflow footprints (e.g., Fig. 9) define a 0.5 mm × 0.5 mm isolated land with 0.55 mm spacing-no routing or stitching vias should connect to it.
Is BZX84W-C12F suitable for automotive applications?
No-this device is explicitly marked as non-automotive qualified per Revision History (Section 13). It lacks AEC-Q200 stress testing and automotive-grade reliability screening. For automotive use, Nexperia offers the -Q qualified BZX84W-Q series; BZX84W-C12F is intended for commercial/industrial environments only.
BZX84W-C12F 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):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 25 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-C12F FAQ
1.How can I place an order for BZX84W-C12F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C12F 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-C12F reliable?
The price and inventory of BZX84W-C12F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C12F is usually 5 days.
3.What payment methods are accepted for BZX84W-C12F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C12F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C12F?
BZX84W-C12F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C12F 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-C12F?
For technical support, including BZX84W-C12F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C12F requirements.
6.How does Aetrix verify that BZX84W-C12F is sourced from the original manufacturer or authorized distributors?
All BZX84W-C12F 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-C12F meets industry standards.
7.What is the process for return or replacement of BZX84W-C12F?
All BZX84W-C12F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C12F, 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-C12F part is unused and in its original packaging.
Return procedure for BZX84W-C12F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C12F Tags
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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SMAJ4744A-TP
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SMAZ12-13-F
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