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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZX384-B15Z

Name: BZX384-B15Z
Brand: Nexperia USA Inc.
SKU: BZX384-B15Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX384-B15Z

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: BZX384-B15Z.pdf

Description:: DIODE ZENER 15V 300MW SOD323

Quantity:: RFQ Add To RFQ list

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Inventory:29,179

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Product details

Overview

BZX384-B15Z from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 15 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and 150 °C maximum junction temperature. It provides stable reference voltage in low-power linear regulators and overvoltage protection circuits for consumer and industrial power management.

For engineers reviewing the BZX384-B15Z datasheet, BZX384-B15Z pinout, BZX384-B15Z application, or BZX384-B15Z equivalent, key selection criteria include its 15 V Zener voltage with ±2 % tolerance, 200 Ω typical differential resistance at 5 mA, 0.05 μA reverse current at 12 V, and thermal resistance of 415 K/W in free air - all critical for precision biasing and compact PCB layout.

Technical Context

This discrete Zener diode operates in reverse-biased breakdown mode to maintain a stable DC reference voltage across its terminals. Its 15 V nominal Zener voltage is specified at I_Z = 5 mA with a temperature coefficient of +9.2 mV/K, indicating positive drift with rising temperature.

The device exhibits 200 Ω typical differential resistance (r_dif) at 5 mA, enabling predictable regulation under small-signal load variations. Non-repetitive peak reverse power dissipation is rated at 40 W for 100 μs pulses, supporting transient surge suppression in low-energy clamping applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	14.7 V to 15.3 V at I_Z = 5 mA - defines precise DC reference accuracy for feedback networks
Differential Resistance (r_dif)	200 Ω max at I_Z = 5 mA - determines output impedance and regulation sensitivity to current changes
Reverse Current (I_R)	0.05 μA max at V_R = 12 V - ensures minimal leakage in high-impedance bias circuits
Total Power Dissipation (P_tot)	300 mW at T_amb ≤ 25 °C on FR4 PCB - sets continuous DC power handling limit for thermal design
Junction Temperature (T_j)	−65 °C to +150 °C - defines operational envelope for reliability in ambient-constrained environments
Thermal Resistance (R_th(j-a))	415 K/W in free air - quantifies self-heating rise per watt, critical for derating in enclosed assemblies
Non-repetitive Peak Power (P_ZSM)	40 W for t_p = 100 μs - enables short-duration transient clamping without device failure

Pinout & Package

Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm body size, cathode marked by bar on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; polarity must be observed for correct reverse-bias operation
2	Anode (A)	Connected to ground or lower-potential rail; forms current path during Zener conduction

Key Features

Feature	Design Value
±2 % Zener voltage tolerance	Enables tighter regulation than ±5 % variants, reducing need for post-calibration in reference designs
Low-profile SOD323 package	0.85 mm height supports ultra-thin PCB assemblies and automated placement in space-constrained modules
40 W non-repetitive peak power	Allows safe absorption of ESD or inductive kick transients without degradation in protection circuits
150 °C maximum junction temperature	Supports reliable operation in thermally demanding environments such as enclosed power supplies
200 Ω max differential resistance	Minimizes output voltage shift under ±1 mA load variation, improving stability in feedback loops

Applications

Power Supply Reference

Overvoltage Clamp

Use Scenario: Providing stable 15 V reference for adjustable LDO feedback divider in battery-powered IoT sensor nodes.

IC Role / Device Role / Timing Role: Zener diode acts as precision shunt reference, setting output voltage via resistor divider network.

Use Value: ±2 % tolerance ensures <±0.3 V error at 15 V, eliminating need for trimming resistors in production.

Use Scenario: Clamping 15 V rail against 18 V surges in automotive body control module input protection stage.

IC Role / Device Role / Timing Role: Shunt limiter conducting only during overvoltage events, diverting excess current to ground.

Use Value: 40 W pulse rating absorbs 100 μs transients without parametric shift, preserving long-term accuracy.

Signal Level Translation

ADC Input Protection

Use Scenario: Biasing op-amp input to 15 V reference in industrial analog front-end for 0–15 V sensor signal conditioning.

IC Role / Device Role / Timing Role: Passive DC bias source establishing common-mode voltage for rail-to-rail input amplifiers.

Use Value: 0.05 μA leakage at 12 V prevents loading of high-impedance sensor outputs (<1 MΩ).

Use Scenario: Protecting 16-bit SAR ADC input from accidental 24 V miswiring in programmable logic controller analog input card.

IC Role / Device Role / Timing Role: First-line clamp limiting input voltage to 15.3 V before series current-limiting resistor.

Use Value: 200 Ω differential resistance ensures clamped voltage stays within ±0.1 V of V_Z under 1 mA fault current.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5245B	15 V, ±5 % tolerance, 350 mW P_tot, SOT-23 package	Higher power but looser tolerance; larger footprint requires PCB redesign	Select when higher continuous power margin is needed and ±5 % accuracy is acceptable
Vishay BZX384-C15	15 V, ±5 % tolerance, same SOD323 package, 250 Ω r_dif	Lower cost but wider voltage spread (14.25–15.75 V); less suitable for tight-reference designs	Select for cost-sensitive applications where 15 V ±0.75 V meets system requirements

Compared with BZX384-B15Z, MMBZ5245B offers +50 mW power headroom but sacrifices accuracy and increases board area; BZX384-C15 retains identical form factor but trades ±2 % precision for lower unit cost - making BZX384-B15Z optimal for space-constrained, accuracy-critical 15 V references.

Availability

BZX384-B15Z is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and signal-level translation requiring stable component supply in industrial automation, consumer electronics, and test equipment.

Supply support for BZX384-B15Z 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 standard logic, analog, and discrete components, headquartered in Nijmegen, Netherlands.

The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered specifically for stable voltage reference and clamping in space-constrained, low-power applications across consumer, industrial, and computing markets.

FAQ

What is the maximum continuous forward current for BZX384-B15Z?

The BZX384-B15Z is not intended for continuous forward conduction; its absolute maximum forward current is 250 mA, but forward operation is limited to brief pulses (e.g., during testing). In normal use, it operates in reverse-biased Zener mode, where forward voltage is 0.9 V at 10 mA - not a rated operating condition.

Can BZX384-B15Z replace a 1N4744A in existing designs?

No - the 1N4744A is a 14 V, 1 W through-hole Zener in DO-41 package, while BZX384-B15Z is a 15 V, 300 mW SOD323 surface-mount device. Differences in voltage, power rating, package, and thermal behavior require full revalidation of bias current, PCB layout, and thermal performance before substitution.

How does temperature affect the 15 V Zener voltage of BZX384-B15Z?

BZX384-B15Z has a temperature coefficient of +9.2 mV/K at I_Z = 5 mA, meaning its Zener voltage increases by approximately 9.2 mV per degree Celsius rise in junction temperature. At 100 °C junction temperature, V_Z rises ~0.7 V above its 25 °C value - a critical factor in high-ambient or high-power applications.

Is BZX384-B15Z suitable for automotive applications?

No - the BZX384-B15Z is explicitly designated as non-automotive qualified per Nexperia's revision history (Rev. 4, January 2023). It lacks AEC-Q200 qualification, automotive-grade screening, and extended temperature validation. For automotive use, Nexperia recommends its -Q qualified alternatives, such as the BZX384-B15-Q series.

BZX384-B15Z 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):: 15 V

Tolerance:: ±2%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 30 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 10.5 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-B15Z FAQ

1.How can I place an order for BZX384-B15Z through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX384-B15Z 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-B15Z reliable?

The price and inventory of BZX384-B15Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B15Z is usually 5 days.

3.What payment methods are accepted for BZX384-B15Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B15Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX384-B15Z?

BZX384-B15Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX384-B15Z 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-B15Z?

For technical support, including BZX384-B15Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B15Z requirements.

6.How does Aetrix verify that BZX384-B15Z is sourced from the original manufacturer or authorized distributors?

All BZX384-B15Z 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-B15Z meets industry standards.

7.What is the process for return or replacement of BZX384-B15Z?

All BZX384-B15Z units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B15Z, 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-B15Z part is unused and in its original packaging.

Return procedure for BZX384-B15Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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