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Nexperia USA Inc. BZX384-B24,115
- Part No.:
- BZX384-B24,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B24,115.pdf
- Description:
- DIODE ZENER 24V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:10,678
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Product details
Overview
BZX384-B24,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 24 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and 16.8 mV/K temperature coefficient. It serves as a precision reference or overvoltage clamp in low-power analog supply rails and sensor interface circuits.
For engineers reviewing the BZX384-B24,115 datasheet, BZX384-B24,115 pinout, BZX384-B24,115 application, or BZX384-B24,115 equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world regulation use cases, and validated alternative parts with documented tolerance and voltage differences.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain stable DC voltage under varying load or input conditions. Its 24 V nominal Zener voltage is specified at IZ = 5 mA with ±2 % tolerance, and exhibits a positive temperature coefficient of +16.8 mV/K - enabling predictable drift compensation in temperature-sensitive references.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it supports non-repetitive surge handling up to 40 W (100 μs pulse) and maintains ≤250 mA forward current capability. Differential resistance is 250 Ω max at IZ = 5 mA, ensuring low dynamic impedance during regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 23.5 V to 24.5 V at IZ = 5 mA - defines precise clamping threshold for 24 V rail stabilization |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets continuous DC power limit on standard FR4 PCB |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - ensures low-loss conduction when used in series protection paths |
| Reverse Current (IR) | ≤0.05 μA at VR = 18.4 V - guarantees minimal leakage below knee voltage in standby mode |
| Differential Resistance (rdif) | ≤250 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +16.8 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Non-repetitive Peak Power | 40 W for tp = 100 μs - enables transient overvoltage suppression without failure |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package: 2-terminal, small-outline diode with cathode marked by bar; dimensions 1.8 mm × 1.35 mm × 0.95 mm; thermal resistance Rth(j-a) = 415 K/W (free air), Rth(j-sp) = 110 K/W (solder point).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker (bar) identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential reference; reverse-bias voltage applied between A and K to enable Zener action |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation than ±5 % variants (BZX384-C24), reducing calibration overhead in precision references |
| 24 V nominal breakdown voltage | Matches common industrial control and telecom supply rails, allowing direct replacement of legacy 24 V Zeners |
| 300 mW power rating | Supports continuous operation in low-current bias networks (<12.5 mA at 24 V) without heatsinking |
| Low differential resistance (≤250 Ω) | Minimizes output voltage shift under load changes - critical for stable feedback in LDO pre-regulators |
| Positive temperature coefficient (+16.8 mV/K) | Allows predictable thermal drift modeling in temperature-compensated reference designs |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
|
Use Scenario: Stabilizing 24 V excitation voltage for 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Zener diode provides fixed reference voltage to op-amp bias network and ADC reference divider. Use Value: ±2 % tolerance ensures <±0.5 V error in sensor output scaling, meeting IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Clamping VBUS overvoltage transients during USB-C hot-plug events in portable docking stations. IC Role / Device Role / Timing Role: Fast-acting shunt device absorbing 40 W surges (100 μs) before downstream PMIC damage occurs. Use Value: 24 V breakdown threshold aligns with USB PD 3.0 20 V max + 20 % margin, preventing false triggering during normal operation. |
| Programmable Logic Controller Input Protection | Automotive Body Control Module Reference |
|
Use Scenario: Protecting 24 V digital input channels against ESD and load dump spikes in PLC backplanes. IC Role / Device Role / Timing Role: Low-leakage (≤0.05 μA) Zener limits voltage to safe levels while drawing negligible quiescent current. Use Value: 250 Ω dynamic impedance ensures fast response to 1 kV/μs transients, maintaining logic-level integrity. |
Use Scenario: Generating stable 24 V reference for LIN bus transceiver biasing in non-automotive-qualified BCM prototypes. IC Role / Device Role / Timing Role: Provides temperature-stable voltage source where automotive-grade parts are unavailable for early validation. Use Value: +16.8 mV/K coefficient allows accurate drift prediction across –40 °C to +125 °C ambient range. |
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-A24,115 | ±1 % tolerance (23.76–24.24 V), lower rdif (≤225 Ω) | Higher precision required in metrology-grade references; tighter thermal drift spec | Select when absolute voltage accuracy outweighs cost sensitivity |
| BZX384-C24,115 | ±5 % tolerance (22.8–25.6 V), higher rdif (≤250 Ω), lower cost | Acceptable for non-critical power rail clamping where 1.2 V margin is sufficient | Select for cost-driven consumer electronics with relaxed regulation specs |
Compared with BZX384-B24,115, the A-series offers superior accuracy for calibration-critical systems, while the C-series trades tolerance for lower unit cost in high-volume surge suppression - making the B-series the balanced choice for industrial 24 V regulation where ±2 % meets functional safety thresholds.
Availability
BZX384-B24,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power delivery clamping, PLC input protection, and automotive body control module prototyping requiring stable component supply and traceable sourcing.
Supply support for BZX384-B24,115 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for low-power voltage regulation and overvoltage protection in space-constrained SMD applications demanding tight tolerance and repeatable thermal behavior.
FAQ
What is the maximum continuous reverse current this diode can sustain?
The BZX384-B24,115 has no specified maximum continuous reverse current, as its operation relies on controlled Zener breakdown at defined test current (5 mA). Its safe operating area is governed by Ptot = 300 mW - limiting sustained reverse current to ≤12.5 mA at 24 V. Exceeding this risks thermal runaway without active cooling.
Can this Zener be used in series with another diode for higher voltage reference generation?
Yes - two BZX384-B24,115 diodes in series yield ~48 V with ±2 % cumulative tolerance (±2.8 % worst-case), provided both operate at matched IZ and ambient temperature. Thermal coupling must be ensured to minimize mismatched drift, as each exhibits +16.8 mV/K coefficient.
How does the SOD323 package affect thermal performance in high-density PCB layouts?
In high-density layouts, the SOD323's Rth(j-a) = 415 K/W (free air) rises significantly due to limited airflow and adjacent heat sources. Mounting on 1 oz. FR4 with thermal relief reduces effective Rth to ~280 K/W; adding copper pour under the cathode pad further improves Rth(j-sp) to ≤90 K/W.
Is this part qualified for automotive applications?
No - BZX384-B24,115 is not automotive-qualified. The datasheet explicitly states non-automotive qualification (Rev. 4, Section 13), and Nexperia offers separate -Q automotive variants. Use only in industrial, commercial, or prototyping contexts where AEC-Q200 compliance is not required.
BZX384-B24,115 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):
- 24 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.8 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-B24,115 FAQ
1.How can I place an order for BZX384-B24,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B24,115 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-B24,115 reliable?
The price and inventory of BZX384-B24,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B24,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B24,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B24,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B24,115?
BZX384-B24,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B24,115 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-B24,115?
For technical support, including BZX384-B24,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B24,115 requirements.
6.How does Aetrix verify that BZX384-B24,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B24,115 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-B24,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B24,115?
All BZX384-B24,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B24,115, 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-B24,115 part is unused and in its original packaging.
Return procedure for BZX384-B24,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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