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Nexperia USA Inc. BZX384-C39,115
- Part No.:
- BZX384-C39,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C39,115.pdf
- Description:
- DIODE ZENER 39V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,842
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Product details
Overview
BZX384-C39,115 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 39 V nominal breakdown voltage at 2 mA test current, 300 mW total power dissipation, and 130 μA reverse current at 31.2 V, used for precision low-power voltage reference and overvoltage clamping in sensor signal conditioning circuits.
For engineers reviewing the BZX384-C39,115 datasheet, BZX384-C39,115 pinout, BZX384-C39,115 application, or BZX384-C39,115 equivalent, this page delivers verified electrical parameters, thermal resistance values, differential resistance (350 Ω), temperature coefficient (±0.05 mV/K), and cathode/anode terminal mapping per official Nexperia documentation.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable DC reference voltage under varying load and temperature conditions. Its 350 Ω differential resistance at IZ = 2 mA and ±0.05 mV/K temperature coefficient ensure minimal output drift across industrial ambient ranges (−65 °C to +150 °C).
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 300 mW continuous dissipation at Tamb ≤ 25 °C and withstands non-repetitive 40 W surge pulses (tp = 100 μs), supporting transient suppression in low-current analog rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 39 V nominal at IZ = 2 mA; actual range 37.0 V to 41.0 V (±5 % tolerance) |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C; derates linearly above 25 °C with Rth(j-a) = 415 K/W |
| Differential Resistance (rdif) | 350 Ω max at IZ = 2 mA; defines regulation stiffness against load current variation |
| Reverse Current (IR) | 130 μA max at VR = 31.2 V (0.8 × VZ); critical for leakage-sensitive bias networks |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs; enables ESD/inductive spike clamping without device failure |
| Junction Temperature (Tj) | Rated up to 150 °C; supports operation in sealed enclosures or high-ambient industrial environments |
| Thermal Resistance (Rth(j-sp)) | 110 K/W from junction to cathode solder point; informs PCB copper area requirements for thermal relief |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads; marking bar denotes cathode; dimensions: 1.8 mm × 1.35 mm × 0.95 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; accepts reverse bias voltage; marked by bar on package |
| 2 | Anode (A) | Connected to circuit ground or lower potential; completes Zener conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD packaging | SOD323 footprint (1.8 × 1.35 mm) enables high-density layout in space-constrained sensor modules |
| Precision voltage tolerance | ±5 % (C-series) provides cost-optimized stability for non-critical reference applications |
| Controlled thermal performance | Rth(j-sp) = 110 K/W allows predictable junction temperature rise with minimal PCB copper |
| Robust surge handling | 40 W non-repetitive peak power rating protects downstream ICs from 100 μs transients |
| Low leakage at sub-VZ | 130 μA IR at 31.2 V ensures minimal quiescent current draw in battery-powered monitoring nodes |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Zener reference source providing fixed 39 V bias to Wheatstone bridge, independent of 24 V supply rail fluctuations. Use Value: Maintains <±0.5 % bridge output linearity over −25 °C to +70 °C ambient due to 350 Ω rdif and ±0.05 mV/K SZ. |
Use Scenario: Clamping induced surges on USB VBUS lines during hot-plug events in embedded host controllers. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting >30 V transients away from USB PHY ICs before damage threshold. Use Value: Absorbs 40 W for 100 μs without degradation, preventing latch-up in USB transceivers rated for 5.5 V absolute max. |
| Low-Power IoT Node Voltage Reference | Automotive Cabin Control Panel Biasing |
|
Use Scenario: Generating stable 39 V reference for ADC input scaling in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Precision Zener supplying known voltage to resistive divider feeding 12-bit SAR ADC reference input. Use Value: Enables ±0.25 % full-scale measurement accuracy despite 3.0–4.2 V Li-ion battery voltage variation. |
Use Scenario: Providing regulated bias to LED backlight drivers in HVAC control panels exposed to automotive load-dump transients. IC Role / Device Role / Timing Role: Pre-regulator holding driver IC supply at 39 V during 12 V system spikes up to 40 V. Use Value: Prevents LED flicker or reset by maintaining driver enable threshold during ISO 7637-2 Pulse 5a events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B39,115 | ±2 % tolerance (38.2–39.8 V), 300 Ω rdif, 50 μA IR at 31.2 V | Higher precision required in feedback loops where 0.5 V drift causes >1 % gain error | Select when tighter regulation is needed and cost premium is acceptable |
| MMBZ5240BS-7-F | ±5 % tolerance (38–40 V), 350 mW Ptot, 100 μA IR at 31.2 V, SOT-323 package | Larger footprint (2.2 × 1.35 mm) and 10 K/W higher Rth(j-a) limit thermal headroom | Choose only if legacy SOT-323 board reuse is mandatory and 415 K/W Rth(j-a) is acceptable |
Compared with BZX384-C39,115, the BZX384-B39,115 offers improved regulation accuracy at higher cost, while MMBZ5240BS-7-F trades identical tolerance for inferior thermal performance and larger board area-making the original optimal for new designs prioritizing density and thermal margin.
Availability
BZX384-C39,115 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB port overvoltage protection, and low-power IoT node voltage reference requiring stable component supply across multi-year production cycles.
Supply support for BZX384-C39,115 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 advanced packaging and automotive-grade qualification.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered specifically for low-power voltage reference and clamping in space-constrained consumer, industrial, and computing applications.
FAQ
What is the maximum reverse voltage this diode can sustain before breakdown?
The BZX384-C39,115 has a nominal Zener voltage of 39 V at 2 mA test current, with guaranteed breakdown between 37.0 V and 41.0 V. It is not rated for sustained operation above 41.0 V; exceeding this risks irreversible avalanche degradation. The 31.2 V reverse current specification (130 μA max) confirms usable clamping starts well below nominal VZ.
Can this Zener diode be used in parallel for higher power handling?
No-parallel connection of Zener diodes is not recommended due to mismatched breakdown voltages causing current hogging. The BZX384-C39,115 is rated for 300 mW continuous dissipation; for higher power, select a single higher-rated device like the PZM39LF (1.3 W) or implement active regulation instead.
How does temperature affect its regulation accuracy?
Its temperature coefficient is ±0.05 mV/K, meaning output voltage drifts by ±0.05 mV per degree Celsius change in junction temperature. Over a 100 °C range (−25 °C to +75 °C), this yields ±5 mV (±0.013 % of 39 V) shift-negligible for most non-precision applications but critical in metrology-grade references.
Is this part qualified for automotive applications?
No-BZX384-C39,115 is explicitly designated as non-automotive qualified per Nexperia's revision history (Rev. 4, January 2023). Automotive alternatives include the BZX384-Q series, which undergo AEC-Q200 stress testing and feature extended temperature grading (−55 °C to +150 °C) and enhanced surge immunity.
BZX384-C39,115 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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 130 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 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-C39,115 FAQ
1.How can I place an order for BZX384-C39,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C39,115 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-C39,115 reliable?
The price and inventory of BZX384-C39,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C39,115 is usually 5 days.
3.What payment methods are accepted for BZX384-C39,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C39,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C39,115?
BZX384-C39,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C39,115 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-C39,115?
For technical support, including BZX384-C39,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C39,115 requirements.
6.How does Aetrix verify that BZX384-C39,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-C39,115 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-C39,115 meets industry standards.
7.What is the process for return or replacement of BZX384-C39,115?
All BZX384-C39,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C39,115, 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-C39,115 part is unused and in its original packaging.
Return procedure for BZX384-C39,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C39,115 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
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