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NXP Semiconductors BZX384-C27/ZLX
- Part No.:
- BZX384-C27/ZLX
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C27/ZLX.pdf
- Description:
- DIODE ZENER 27V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,381
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Product details
Overview
BZX384-C27/ZLX from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 27 V nominal breakdown voltage at IZ = 2 mA, 300 mW total power dissipation, and 150 °C maximum junction temperature - used for precision low-power voltage reference and overvoltage protection in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX384-C27/ZLX datasheet, BZX384-C27/ZLX pinout, BZX384-C27/ZLX application, or BZX384-C27/ZLX equivalent, this page delivers verified electrical specs, thermal behavior, cathode/anode terminal mapping, real-world use cases, and validated alternative parts for supply continuity and design flexibility.
Technical Context
The BZX384-C27/ZLX operates as a two-terminal silicon Zener diode with sharp reverse-breakdown characteristics, optimized for stable DC voltage regulation under low-current conditions (IZ = 2 mA). Its differential resistance is ≤300 Ω, reverse current is ≤0.05 μA at VR = 20.8 V, and temperature coefficient is +18.9 mV/K at IZ = 2 mA - indicating positive thermal drift suitable for biasing and reference circuits where moderate TC is acceptable.
Designed for surface-mount assembly on FR4 PCBs with standard SOD323 footprint, it supports reflow and wave soldering per Nexperia's recommended land patterns. Thermal resistance from junction to ambient is 415 K/W in free air, and 110 K/W to solder point - confirming its suitability for thermally isolated, low-power signal conditioning nodes rather than high-dissipation regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 25.1 V to 28.9 V at IZ = 2 mA - defines usable regulation window for 27 V nominal rail stabilization |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - limits continuous DC current to ~11 mA at 27 V, constraining use to low-power references |
| Differential Resistance (rdif) | ≤300 Ω - ensures <1 % output variation across ±1 mA load change, supporting stable feedback node referencing |
| Reverse Current (IR) | ≤0.05 μA at VR = 20.8 V - enables ultra-low leakage in standby-mode voltage monitors and battery-backed circuits |
| Temperature Coefficient (SZ) | +18.9 mV/K at IZ = 2 mA - introduces predictable +0.7 %/°C drift, requiring compensation in high-accuracy analog references |
| Junction Temperature (Tj) | −65 °C to +150 °C - allows operation in extended industrial environments without derating below 125 °C ambient |
| Package | SOD323 (SC-76) - 1.35 mm × 0.85 mm footprint with 0.45 mm height, compatible with 0201-class pick-and-place and automated optical inspection |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads; marking bar denotes cathode (Pin 1); anode (Pin 2) is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; reverse-biased during regulation; carries full Zener current |
| 2 (A) | Anode | Connected to ground or lower-potential rail; serves as return path for Zener current during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % voltage tolerance | Enables cost-effective selection for non-critical biasing and clamping where tight regulation is unnecessary |
| 300 mW power rating | Supports continuous operation up to 11 mA at 27 V - sufficient for op-amp reference inputs and microcontroller reset thresholds |
| Low reverse leakage (≤0.05 μA) | Minimizes quiescent current draw in always-on monitoring circuits and battery-powered sensors |
| SOD323 compact footprint | Reduces board area by >50 % vs. DO-35; fits dense layouts in wearables, IoT edge nodes, and portable instrumentation |
| Non-repetitive peak power (40 W) | Withstands transient surges up to 1.0 A for 100 μs - provides robust ESD and line-spike suppression in DC input stages |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 27 V reference for ADC voltage dividers and comparator hysteresis networks in industrial sensor transmitters. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing precise threshold for analog signal conditioning. Use Value: Delivers <1 % regulation error over 0–10 mA load range and −40 °C to +85 °C ambient, enabling repeatable measurement calibration. |
Use Scenario: Protecting 24 V DC input stage of PLC I/O modules against 30–40 V transients induced by inductive load switching. IC Role / Device Role / Timing Role: Shunt clamping device diverting surge current away from downstream regulators and logic ICs. Use Value: Activates within 10 ns at 28.9 V, limiting clamp voltage to ≤32 V for 100 μs pulses - preserving 24 V system integrity. |
| Microcontroller Reset Circuit | LED Current Biasing |
|
Use Scenario: Generating clean 27 V reset threshold for brown-out detection in automotive body control modules operating from 12 V/24 V dual-rail supplies. IC Role / Device Role / Timing Role: Precision voltage threshold element triggering POR (power-on reset) logic via external comparator. Use Value: Maintains 27 V trigger point with ±1.8 V tolerance across temperature, ensuring deterministic reset timing independent of supply ripple. |
Use Scenario: Setting constant forward current for high-brightness white LEDs in architectural lighting drivers where thermal stability is secondary to cost. IC Role / Device Role / Timing Role: Passive current-setting element in series with LED string, leveraging Zener voltage drop to fix ILED. Use Value: Provides 27 V reference drop with <±0.5 V drift over 0–50 °C, delivering ±3 % LED current accuracy without active regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B27 | ±2 % tolerance (26.5 V–27.5 V), lower rdif (≤150 Ω), tighter TC (+16.8 mV/K) | Better regulation stability for mid-accuracy references; higher cost and reduced availability vs. C-series | Select when ±2 % VZ tolerance and lower dynamic impedance are required for improved load regulation. |
| MMBZ5256BS | ±5 % tolerance (26.6 V–27.8 V), same SOD323 package, Ptot = 300 mW, but higher IR (≤1.0 μA at VR = 20.8 V) | Higher leakage reduces suitability for ultra-low-power battery monitoring; wider VZ spread affects threshold repeatability | Choose only if BZX384-C27/ZLX is unavailable and leakage sensitivity is not critical in the target circuit. |
Compared with BZX384-B27, BZX384-C27/ZLX trades tighter voltage control for broader tolerance and lower cost; versus MMBZ5256BS, it offers superior leakage performance but identical package and power handling - making it preferred for low-quiescent, cost-sensitive regulation.
Availability
BZX384-C27/ZLX is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable instrumentation power rails, and embedded microcontroller reset circuits requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZX384-C27/ZLX 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 advanced packaging and automotive-grade components.
The BZX384 series was designed for general-purpose voltage regulation in consumer, industrial, and computing applications - emphasizing small size, consistent parametric distribution, and compatibility with high-speed SMT assembly lines.
FAQ
What is the nominal Zener voltage and tolerance of BZX384-C27/ZLX?
The BZX384-C27/ZLX has a nominal Zener voltage of 27 V with ±5 % tolerance, meaning its actual breakdown voltage falls between 25.1 V and 28.9 V when tested at IZ = 2 mA. This tolerance band is confirmed in Table 9 of the Nexperia datasheet Rev. 4 and aligns with the "C" series designation across the BZX384 family. The BZX384-C27/ZLX is intended for applications where moderate voltage accuracy suffices.
What package type and dimensions does BZX384-C27/ZLX use?
BZX384-C27/ZLX uses the SOD323 (SC-76) surface-mount plastic package, measuring 1.35 mm × 0.85 mm with a maximum height of 0.45 mm. Its outline matches JEDEC standard SC-76, and the cathode is marked by a visible bar on the top surface. Footprint recommendations for reflow and wave soldering are provided in Figures 12 and 13 of the official Nexperia datasheet.
What is the maximum continuous power dissipation for BZX384-C27/ZLX?
The BZX384-C27/ZLX has a maximum total power dissipation (Ptot) of 300 mW at ambient temperatures ≤25 °C when mounted on a standard FR4 PCB with single-sided copper. Derating begins above 25 °C at 2.4 mW/°C, reaching zero dissipation at 150 °C ambient - consistent with its 150 °C maximum junction temperature rating.
How does the temperature coefficient affect BZX384-C27/ZLX performance?
The BZX384-C27/ZLX exhibits a positive temperature coefficient of +18.9 mV/K at IZ = 2 mA, meaning its Zener voltage increases by approximately 0.7 % per °C rise in junction temperature. This behavior is typical for Zeners above 5.6 V and must be accounted for in precision reference designs - though it remains acceptable for clamping and coarse biasing applications.
Can BZX384-C27/ZLX replace BZX384-A27 or BZX384-B27 in existing designs?
BZX384-C27/ZLX is not a direct replacement for BZX384-A27 (±1 %) or BZX384-B27 (±2 %) due to its wider ±5 % tolerance and higher differential resistance (≤300 Ω vs. ≤150 Ω for B-series). It may be substituted only if the application tolerates greater VZ variation and reduced regulation stiffness - such as non-critical voltage clamping or coarse threshold setting.
BZX384-C27/ZLX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 700 mV
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-C27/ZLX FAQ
1.How can I place an order for BZX384-C27/ZLX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C27/ZLX 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 BZX384-C27/ZLX reliable?
The price and inventory of BZX384-C27/ZLX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C27/ZLX is usually 5 days.
3.What payment methods are accepted for BZX384-C27/ZLX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C27/ZLX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C27/ZLX?
BZX384-C27/ZLX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C27/ZLX 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 BZX384-C27/ZLX?
For technical support, including BZX384-C27/ZLX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C27/ZLX requirements.
6.How does Aetrix verify that BZX384-C27/ZLX is sourced from the original manufacturer or authorized distributors?
All BZX384-C27/ZLX 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 BZX384-C27/ZLX meets industry standards.
7.What is the process for return or replacement of BZX384-C27/ZLX?
All BZX384-C27/ZLX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C27/ZLX, 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 BZX384-C27/ZLX part is unused and in its original packaging.
Return procedure for BZX384-C27/ZLX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C27/ZLX Tags
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