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Nexperia USA Inc. BZX384-C27-QX
- Part No.:
- BZX384-C27-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C27-QX.pdf
- Description:
- DIODE ZENER 27V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,866
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Product details
Overview
BZX384-C27-Q 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, with 300 mW total power dissipation and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX384-C27-Q datasheet, BZX384-C27-Q pinout, BZX384-C27-Q application, or BZX384-C27-Q equivalent, this part serves as a precision low-power voltage reference in ECU power rails, sensor biasing networks, and overvoltage clamp circuits where stable 27 V regulation under transient conditions is required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable 27 V reference across its terminals when current exceeds the knee threshold (IZ ≥ 2 mA). Its differential resistance is ≤300 Ω at IZ = 2 mA, and temperature coefficient is +0.05 mV/K - indicating minimal drift over temperature.
Designed for automotive-grade reliability, it withstands non-repetitive peak reverse power up to 40 W (tp = 100 μs), supports ambient operation from −65 °C to +150 °C, and exhibits 50 A non-repetitive peak reverse current capability per datasheet Table 9.
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 design |
| Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance rdif | ≤300 Ω at IZ = 2 mA - determines output impedance and load regulation error sensitivity |
| Reverse Current IR | ≤80 μA at VR = 20.3 V - specifies leakage level below breakdown, critical for low-power standby circuits |
| Non-repetitive Peak Power | 40 W (tp = 100 μs) - enables transient overvoltage suppression without failure |
| Junction Temperature Tj | −65 °C to +150 °C - confirms suitability for under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with 2 leads; cathode marked by bar on top surface; footprint compatible with JEDEC MS-012AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity-sensitive terminal requiring correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % voltage tolerance | Enables cost-optimized selection for non-critical 27 V reference applications without tight calibration |
| AEC-Q101 qualification | Validates robustness for automotive ECU, body control, and ADAS power management modules |
| 40 W surge rating | Provides immunity against ISO 7637-2 pulse 1/2a/5a transients in 12 V vehicle systems |
| Low thermal resistance | Rth(j-sp) = 110 K/W to cathode solder point - improves power derating margin on compact PCBs |
| SOD323 footprint | 0.6 mm × 1.35 mm body size - supports high-density layout in space-constrained modules |
Applications
| Automotive ECU Power Clamp | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Clamping 27 V supply rail in engine control unit against load dump transients. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy into ground during ISO 7637-2 Pulse 5a events. Use Value: Limits rail voltage to ≤28.9 V (max VZ) while sustaining 40 W peak power for 100 μs without degradation. |
Use Scenario: Providing stable 27 V bias to analog front-end of pressure sensor in hydraulic control system. IC Role / Device Role / Timing Role: Precision voltage reference source with <0.05 mV/K tempco, minimizing offset drift over −40 °C to +125 °C. Use Value: Maintains sensor excitation accuracy within ±0.1 % full-scale error across operating temperature range. |
| Consumer Power Supply Feedback | Telecom Line Interface Protection |
Use Scenario: Secondary-side voltage reference in isolated flyback converter for USB-C PD adapter. IC Role / Device Role / Timing Role: Regulator diode in optocoupler feedback loop to set 27 V output compliance threshold. Use Value: Enables ±5 % output regulation tolerance while consuming only 300 mW max at full load. |
Use Scenario: Overvoltage protection element on 24 V telecom line interface card. IC Role / Device Role / Timing Role: Standby clamping device that activates above 28.9 V to divert surge current away from PHY IC. Use Value: Responds within nanoseconds to fast-rising transients (e.g., lightning-induced surges) due to low junction capacitance (50 pF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B27-Q | ±2 % tolerance (26.5 V–27.5 V); lower rdif (≤150 Ω); same package and AEC-Q101 rating | Better regulation stability for precision feedback loops; higher cost than C-grade | Select when tighter voltage control is needed without upgrading to A-grade |
| MMSZ5258ET1G | ±5 % tolerance (25.65 V–28.35 V); SOD-123 package; 500 mW Ptot; no AEC-Q101 certification | Higher power handling but unqualified for automotive; larger footprint increases board area | Acceptable for industrial/commercial designs where AEC-Q101 is not mandated |
Compared with BZX384-C27-Q, the BZX384-B27-Q offers improved voltage accuracy and lower dynamic impedance for tighter regulation, while MMSZ5258ET1G provides higher power headroom in a less space-efficient package and lacks automotive qualification - making the C-grade optimal for cost-sensitive, AEC-compliant 27 V clamping.
Availability
BZX384-C27-Q is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, consumer power adapters, and telecom line interfaces requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX384-C27-Q 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 BZX384-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation in harsh automotive environments and space-constrained industrial electronics.
FAQ
What is the maximum continuous reverse current this diode can handle at 27 V?
The BZX384-C27-Q is not rated for continuous reverse current at 27 V - it operates in Zener breakdown mode with specified test current IZ = 2 mA. Continuous operation must remain within Ptot = 300 mW limit, meaning max average IZ ≈ 11.1 mA at exactly 27 V. Exceeding this risks thermal runaway and permanent damage.
Does this part have a defined forward voltage specification?
Yes - forward voltage VF is specified as ≤0.9 V at IF = 10 mA and ≤1.1 V at IF = 100 mA (pulse test, tp ≤ 100 μs). This value is relevant for polarity-check circuits or series-connected protection configurations where forward conduction may occur.
Can BZX384-C27-Q replace BZX384-A27-Q in an existing design?
Yes, but with trade-offs: the C-grade has wider tolerance (±5 % vs. ±1 %), higher differential resistance (≤300 Ω vs. ≤150 Ω), and slightly higher leakage. It is acceptable for non-critical clamping or biasing where cost matters more than precision, provided the design accommodates 25.1–28.9 V regulation range.
How does the 40 W non-repetitive peak power rating translate to real-world surge handling?
This rating means the diode can safely absorb a single 100 μs square-wave pulse of up to 40 W (e.g., 27 V × 1.48 A) without failure. It aligns with ISO 7637-2 Pulse 5a (load dump) requirements for 12 V automotive systems, enabling direct integration into power rail protection without external series resistors.
BZX384-C27-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-C27-QX FAQ
1.How can I place an order for BZX384-C27-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C27-QX 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-QX reliable?
The price and inventory of BZX384-C27-QX 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-QX is usually 5 days.
3.What payment methods are accepted for BZX384-C27-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C27-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C27-QX?
BZX384-C27-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C27-QX 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-QX?
For technical support, including BZX384-C27-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C27-QX requirements.
6.How does Aetrix verify that BZX384-C27-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-C27-QX 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-QX meets industry standards.
7.What is the process for return or replacement of BZX384-C27-QX?
All BZX384-C27-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C27-QX, 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-QX part is unused and in its original packaging.
Return procedure for BZX384-C27-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C27-QX Tags
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