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Nexperia USA Inc. BZX384-B27,115
- Part No.:
- BZX384-B27,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B27,115.pdf
- Description:
- DIODE ZENER 27V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,028
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Product details
Overview
BZX384-B27,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 27 V nominal breakdown voltage at 2 mA, 300 mW total power dissipation, and 150 °C maximum junction temperature. It provides stable reference voltage in low-power analog circuits, power supply feedback loops, and overvoltage protection for microcontroller I/O pins.
For engineers reviewing the BZX384-B27,115 datasheet, BZX384-B27,115 pinout, BZX384-B27,115 application, or BZX384-B27,115 equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, SOD323 footprint compatibility, and direct alternatives with documented tolerance and voltage deviation differences.
Technical Context
This device operates as a two-terminal silicon Zener diode, conducting in reverse bias above its specified 27 V breakdown voltage with differential resistance of 300 Ω at 2 mA test current. Its temperature coefficient is +0.05 mV/K, indicating minimal drift over temperature when used within recommended current ranges.
The SOD323 package enables surface-mount integration with thermal resistance from junction to ambient of 415 K/W on FR4 PCBs and 110 K/W to solder point, supporting reliable operation up to 150 °C junction temperature under pulsed or continuous DC conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 26.5 V to 27.5 V at IZ = 2 mA - ensures precise 27 V regulation with ±2 % tolerance for stable reference generation |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance rdif | 300 Ω max at IZ = 2 mA - determines output impedance and load regulation sensitivity in shunt regulator configurations |
| Reverse Current IR | 80 μA max at VR = 20.3 V - specifies leakage level below breakdown, critical for low-current standby circuits |
| Non-repetitive Peak Reverse Power | 40 W for tp = 100 μs - supports transient overvoltage clamping without damage during surge events |
| Junction Temperature Range | –65 °C to +150 °C - enables operation in industrial and extended-temperature environments |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - defines conduction loss when used in forward-biased protection or logic-level detection |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads; compact 1.35 mm × 0.85 mm body, 0.45 mm lead pitch, and cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node in shunt configuration; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias polarity must be observed for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % voltage tolerance | Enables tighter regulation than ±5 % variants, reducing need for post-regulation trimming in precision references |
| 300 mW power rating | Supports higher current shunt regulation than 200 mW devices, allowing use in 5–10 mA feedback paths without derating |
| Low 300 Ω dynamic impedance | Minimizes output voltage variation under load changes, improving stability in active feedback networks |
| 150 °C max junction temperature | Permits deployment in thermally constrained spaces such as enclosed power modules or high-density PCBs |
| SOD323 footprint compatibility | Matches industry-standard 0805-equivalent land pattern, enabling drop-in replacement in existing designs |
Applications
| Power Supply Feedback | Microcontroller I/O Protection |
|---|---|
Use Scenario: Regulating output voltage of isolated flyback or buck converter via optocoupler feedback loop. IC Role / Device Role / Timing Role: Shunt reference providing stable 27 V threshold to TL431 or similar error amplifier input. Use Value: Maintains ±1 % output accuracy across line/load variations due to tight 27 V tolerance and low dynamic impedance. |
Use Scenario: Clamping 3.3 V or 5 V GPIO lines against ESD or accidental overvoltage exposure. IC Role / Device Role / Timing Role: Bidirectional transient suppressor-Zener action limits positive excursions; forward conduction blocks negative spikes. Use Value: Limits pin voltage to ≤27.5 V while dissipating <100 mW during 2 kV HBM ESD event, preventing latch-up. |
| Reference Voltage Source | Overvoltage Detection Threshold |
Use Scenario: Generating precision 27 V reference for ADC calibration or DAC output scaling in sensor signal chains. IC Role / Device Role / Timing Role: Passive voltage reference connected to op-amp buffer input for low-noise, low-drift biasing. Use Value: Delivers <50 ppm/°C drift over –40 °C to +85 °C, meeting Class A instrumentation requirements. |
Use Scenario: Triggering shutdown circuitry when DC bus exceeds safe operating limit in motor drive or battery management systems. IC Role / Device Role / Timing Role: Zener anode tied to monitored rail; cathode drives comparator input through pull-up resistor. Use Value: Activates fault response at 27.2 V ±0.3 V, with <1 μs response time due to sub-50 pF capacitance at 0 V bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52-B27 | Same 27 V ±2 % rating, but 500 mW Ptot, DO-35 package | Higher power handling suits higher-current shunt loads; axial lead form factor requires board rework | Select when >300 mW continuous dissipation is required and through-hole assembly is acceptable |
| Vishay BZX584C27 | 27 V ±5 % tolerance, same SOD323 package, 300 mW rating | Looser tolerance increases reference uncertainty but lowers cost; identical footprint allows layout reuse | Select for cost-sensitive consumer applications where ±5 % regulation is sufficient |
Compared with BZX384-B27,115, the BZT52-B27 offers higher power margin at the expense of larger size and assembly method change, while the BZX584C27 retains SOD323 compatibility but trades voltage precision for unit cost reduction in non-critical sensing roles.
Availability
BZX384-B27,115 is available at Aetrix Electronics and suitable for power supply feedback, microcontroller I/O protection, reference voltage source, and overvoltage detection requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for BZX384-B27,115 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 BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage reference and clamping in space-constrained, low-power electronic systems.
FAQ
What is the maximum continuous reverse current this diode can handle at 27 V?
The BZX384-B27,115 is not rated for continuous reverse current at its nominal Zener voltage. At 27 V, it operates in breakdown with typical test current of 2 mA. Continuous operation must remain within 300 mW power limit - corresponding to ~11.1 mA at 27 V - and requires thermal derating above 25 °C ambient per the 415 K/W junction-to-ambient thermal resistance.
Can this diode replace a 24 V Zener in an existing design?
No - BZX384-B27,115 has a nominal 27 V breakdown voltage with ±2 % tolerance (26.5–27.5 V), which exceeds the 24 V specification by more than 10 %. Substituting it would raise regulation or clamping thresholds, potentially causing overvoltage stress on downstream circuitry or failure to trigger protection at intended levels.
How does the temperature coefficient affect regulation accuracy over –40 °C to +125 °C?
With a specified temperature coefficient of +0.05 mV/K, the BZX384-B27,115 exhibits approximately ±4.25 mV drift over a 170 K range, translating to ±0.016 % of 27 V. This contributes less than 0.02 % additional error beyond initial ±2 % tolerance, making it suitable for applications requiring <±2.1 % total voltage accuracy across industrial temperature ranges.
Is this part suitable for automotive applications?
No - the BZX384-B27,115 is explicitly designated as non-automotive qualified in Nexperia's revision history (Rev. 4, January 2023). It lacks AEC-Q101 qualification, automotive-grade screening, and guaranteed performance over –40 °C to +150 °C with extended lifetime testing. Automotive designs require Nexperia's -Q qualified variants such as BZX384-B27-Q.
BZX384-B27,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±2%
- 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-B27,115 FAQ
1.How can I place an order for BZX384-B27,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B27,115 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-B27,115 reliable?
The price and inventory of BZX384-B27,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B27,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B27,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B27,115 transactions.
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4.How is shipping managed for BZX384-B27,115?
BZX384-B27,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B27,115 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-B27,115?
For technical support, including BZX384-B27,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B27,115 requirements.
6.How does Aetrix verify that BZX384-B27,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B27,115 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-B27,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B27,115?
All BZX384-B27,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B27,115, 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-B27,115 part is unused and in its original packaging.
Return procedure for BZX384-B27,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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