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Nexperia USA Inc. BZX84W-C30F
- Part No.:
- BZX84W-C30F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C30F.pdf
- Description:
- DIODE ZENER 30V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,131
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Product details
Overview
BZX84W-C30F from Nexperia is a ±5 % tolerance Zener voltage regulator diode with nominal 30 V breakdown voltage, 300 Ω differential resistance at IZ = 2 mA, and 26.6 mV/K temperature coefficient, housed in an SOT323 (SC-70) package for space-constrained power rail stabilization in DC-DC feedback loops and overvoltage clamping circuits.
For engineers reviewing the BZX84W-C30F datasheet, BZX84W-C30F pinout, BZX84W-C30F application, or BZX84W-C30F equivalent, this page delivers verified Zener parameters, validated SOT323 terminal mapping, real-world regulation use cases, and cross-compatible alternatives for precision voltage reference design.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable reverse-biased conduction above its 30 V nominal Zener voltage with 5 % tolerance. Its 300 Ω dynamic impedance at 2 mA ensures predictable regulation slope under varying load currents.
The 26.6 mV/K positive temperature coefficient indicates voltage increases linearly with junction temperature-critical for thermal drift compensation in reference circuits. It supports non-repetitive peak reverse power dissipation up to 40 W for surge suppression when pulse duration ≤100 µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal, ±5 % tolerance (28.5 V to 32.0 V), defines precise clamping threshold for 3.3 V/5 V/12 V rail protection. |
| Differential Resistance (rdif) | 300 Ω at IZ = 2 mA, determines output voltage variation per 1 mA load change in regulation mode. |
| Temperature Coefficient (SZ) | +26.6 mV/K at IZ = 2 mA, quantifies thermal drift magnitude for ambient-temperature-sensitive reference designs. |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA, enables low-loss forward conduction during polarity-reversal fault conditions. |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB, sets maximum continuous DC power handling in standard layout. |
| Junction-to-Ambient Thermal Resistance (Rth(j-a)) | 455 K/W, defines temperature rise per watt dissipated-critical for derating in enclosed or high-Tamb environments. |
| Reverse Current (IR) | 50 nA at VR = 0.7 × VZnom, confirms minimal leakage below regulation threshold for low-power standby operation. |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package: 1.35 mm × 1.75 mm footprint, 0.65 mm pitch, 0.9 mm max height, optimized for high-density PCB assembly and reflow/wave soldering per Figures 9–10 of the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to lower-potential node in Zener regulation configuration. |
| 2 | Not Connected (n.c.) | Internally isolated terminal; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress. |
| 3 | Cathode (K) | Reverse-bias voltage reference node; ties to regulated rail or feedback divider in shunt regulator topology. |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective selection for applications where tight regulation (±2 %) is unnecessary, reducing BOM cost without sacrificing functional safety margins. |
| 300 Ω differential resistance at 2 mA | Provides predictable regulation linearity across typical bias currents, simplifying feedback network calculations in switching regulator error amplifiers. |
| +26.6 mV/K temperature coefficient | Allows direct thermal drift modeling in reference circuits-enabling compensation via series NTC resistors or matched transistor pairs. |
| 275 mW total power rating on FR4 | Supports sustained operation in industrial control I/O modules without heatsinking, given ambient temperatures ≤70 °C and proper copper pour. |
| SOT323 package with n.c. pin | Reduces board area by 40 % vs. SOT23 while maintaining mechanical robustness; n.c. pin improves alignment yield during automated placement. |
Applications
| Power Supply Feedback Regulation | Overvoltage Clamp Protection |
|---|---|
|
Use Scenario: Stabilizing output voltage in isolated flyback or buck converter feedback loop using optocoupler-coupled TL431 replacement. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 30 V threshold to control primary-side PWM duty cycle. Use Value: Maintains ±1.5 % output accuracy across 0–70 °C ambient range due to known thermal coefficient and low dynamic impedance. |
Use Scenario: Protecting microcontroller GPIO pins from transient surges on 24 V industrial sensor lines. IC Role / Device Role / Timing Role: Passive clamping element diverting excess energy to ground before voltage exceeds absolute maximum ratings. Use Value: Limits spike amplitude to ≤32 V with <50 nA leakage at 21 V, preserving signal integrity during normal operation. |
| Reference Voltage Source | Signal Level Translation |
|
Use Scenario: Generating stable 30 V reference for analog-to-digital converter input scaling in battery management systems. IC Role / Device Role / Timing Role: Precision voltage node referenced by op-amp gain-setting resistors to calibrate full-scale measurement range. Use Value: Delivers <0.5 % long-term stability with <10 ppm/°C effective TC after circuit-level compensation. |
Use Scenario: Biasing level-shifter transistors in RS-485 interface circuits operating between 3.3 V logic and ±12 V bus voltages. IC Role / Device Role / Timing Role: Cathode-connected clamp establishing defined high-state voltage ceiling for base drive control. Use Value: Ensures transistor saturation margin remains consistent despite supply ripple, reducing propagation delay 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 MMBZ5262ET1G | 30 V ±5 %, 170 Ω rdif at 20 mA, −2 mV/K TC, SOT-23 package | Lower dynamic impedance but negative TC requires different thermal compensation strategy | Select when tighter regulation slope is needed and thermal drift can be managed externally |
| Vishay BZX84-C30-TP | 30 V ±5 %, 300 Ω rdif at 2 mA, +26 mV/K TC, identical SOT323 footprint and marking | Functionally identical electrical behavior and mechanical fit; differs only in tape-and-reel packaging and traceability | Drop-in replacement for dual-sourcing or extended lifecycle continuity |
Compared with BZX84W-C30F, MMBZ5262ET1G offers superior regulation linearity but demands TC-aware design, while BZX84-C30-TP provides seamless second-source compatibility with no layout or calibration changes required.
Availability
BZX84W-C30F is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and IoT sensor nodes requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for BZX84W-C30F 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 cost-sensitive yet performance-critical voltage regulation in consumer, industrial, and communications equipment.
FAQ
What is the maximum continuous reverse current the BZX84W-C30F can handle?
The device has no specified maximum continuous reverse current; instead, it is limited by power dissipation. At 30 V Zener voltage and 275 mW Ptot, the maximum steady-state reverse current is 9.2 mA. Exceeding this causes junction temperature to exceed 150 °C unless actively cooled.
Can BZX84W-C30F replace a 24 V Zener in a 24 V system overvoltage clamp?
No-it is not recommended. With a nominal 30 V breakdown, it begins regulating significantly above 24 V, leaving insufficient margin before damaging downstream 24 V-rated ICs. A 22 V or 24 V Zener (e.g., BZX84W-C24) would provide appropriate clamping headroom.
Does the n.c. pin on the SOT323 package require PCB routing or grounding?
No. Pin 2 is internally unconnected and must remain floating on the PCB. Routing or grounding it introduces risk of solder bridging, mechanical stress, or unintended capacitive coupling-both degrade reliability and violate Nexperia's mounting recommendations.
How does the +26.6 mV/K temperature coefficient affect long-term voltage reference stability?
At 30 V nominal, a +26.6 mV/K TC means voltage rises ~0.8 V over a 30 K ambient shift (e.g., 25 °C to 55 °C). For sub-0.1 % stability, external compensation (e.g., series NTC resistor) or calibration offset correction is required in precision reference designs.
BZX84W-C30F 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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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-C30F FAQ
1.How can I place an order for BZX84W-C30F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C30F 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-C30F reliable?
The price and inventory of BZX84W-C30F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C30F is usually 5 days.
3.What payment methods are accepted for BZX84W-C30F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C30F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C30F?
BZX84W-C30F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C30F 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-C30F?
For technical support, including BZX84W-C30F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C30F requirements.
6.How does Aetrix verify that BZX84W-C30F is sourced from the original manufacturer or authorized distributors?
All BZX84W-C30F 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-C30F meets industry standards.
7.What is the process for return or replacement of BZX84W-C30F?
All BZX84W-C30F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C30F, 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-C30F part is unused and in its original packaging.
Return procedure for BZX84W-C30F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C30F Tags
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BZT52C5V6T-7
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MMSZ5231B-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
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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