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

Nexperia USA Inc. BZX79-B15,133

Name: BZX79-B15,133
Brand: Nexperia USA Inc.
SKU: BZX79-B15,133
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX79-B15,133

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: BZX79-B15,133.pdf

Description:: DIODE ZENER 15V 400MW ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:17,248

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Product details

Overview

BZX79-B15,133 from Nexperia is a ±2% tolerance Zener voltage regulator diode with nominal 15 V breakdown voltage at 5 mA test current, 50 Ω typical differential resistance, and −65 °C to +200 °C junction temperature range; designed for low-power voltage reference and stabilization in linear power supplies and analog sensor biasing circuits.

For engineers reviewing the BZX79-B15,133 datasheet, BZX79-B15,133 pinout, BZX79-B15,133 application, or BZX79-B15,133 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (380 K/W), non-repetitive peak reverse power (40 W), and DO-35 package compatibility with through-hole PCB assembly.

Technical Context

This discrete Zener diode operates in reverse-biased breakdown mode to maintain stable DC voltage under varying load or input conditions. Its 15 V nominal Zener voltage is specified at I_Z = 5 mA, with 50 Ω typical dynamic impedance ensuring minimal output voltage variation across operating current.

Temperature coefficient is +9.2 mV/K (typical) at 5 mA, indicating positive drift with rising junction temperature - critical for precision reference designs requiring thermal compensation. The device uses hermetically sealed glass SOD27 (DO-35) construction for long-term stability and moisture resistance.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	14.7 V to 15.3 V at I_Z = 5 mA - ensures tight regulation within ±2% tolerance for precision references
Differential Resistance r_diff	50 Ω (typical) at I_Z = 5 mA - low impedance minimizes output voltage shift under load changes
Power Dissipation P_tot	500 mW at T_amb = 50 °C - defines maximum continuous DC power handling on standard PCB
Reverse Current I_R	50 nA max at V_R = 10.5 V - ultra-low leakage preserves accuracy in high-impedance bias networks
Thermal Resistance R_{th j-a}	380 K/W - determines junction-to-ambient temperature rise per watt; limits usable power at elevated ambient
Non-repetitive Peak Power	40 W for t_p = 100 μs - supports transient surge suppression in protection circuits
Junction Temperature Range	−65 °C to +200 °C - enables operation in automotive under-hood and industrial environments

Pinout & Package

Hermetically sealed glass SOD27 (DO-35) axial-leaded package with cathode indicated by a colored band. Leads are tinned copper-clad steel; body diameter 1.85 mm, length 4.25 mm, lead spacing 25.4 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-voltage side in Zener mode	Connected to circuit ground or lower potential node when used as shunt regulator
Cathode	Reverse breakdown terminal / regulated output node	Connected to input voltage source via series resistor; provides stable 15 V reference point

Key Features

Feature	Design Value
±2% Zener voltage tolerance	Enables direct replacement in precision 15 V reference designs without recalibration
Hermetic glass SOD27 package	Guarantees long-term parameter stability and immunity to humidity-induced drift
500 mW total power dissipation	Supports continuous operation in compact linear regulators without forced cooling
40 W non-repetitive peak power rating	Allows brief overvoltage clamping during ESD or line transients without failure
+9.2 mV/K temperature coefficient (typ.)	Enables predictable thermal drift modeling for compensated reference circuits

Applications

Linear Power Supply Reference

Sensor Biasing Circuit

Use Scenario: Stabilizing feedback voltage in 15 V linear regulator ICs (e.g., LM317-based designs) where external reference improves accuracy.

IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 15 V setpoint to regulator error amplifier.

Use Value: Maintains output regulation within ±1% over load and line variations due to low 50 Ω dynamic impedance.

Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or strain gauges in measurement front-ends.

IC Role / Device Role / Timing Role: Precision DC bias source ensuring consistent sensor signal amplitude and linearity.

Use Value: Ultra-low 50 nA reverse leakage prevents measurement offset errors in high-impedance bridge configurations.

Overvoltage Clamp

Microcontroller Reset Circuit

Use Scenario: Protecting downstream 15 V-rated logic inputs from transient surges exceeding 16 V.

IC Role / Device Role / Timing Role: Passive clamping element diverting excess energy to ground during fast transients.

Use Value: Withstands 40 W non-repetitive pulses (100 μs), enabling robust protection without active components.

Use Scenario: Generating clean reset signal for microcontrollers requiring 15 V threshold detection.

IC Role / Device Role / Timing Role: Threshold detector in RC-based reset generator, triggering reset until supply reaches 15 V.

Use Value: Tight ±2% tolerance ensures deterministic reset timing across temperature and unit variance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4744A	14 V nominal Zener voltage, ±5% tolerance, 1 W power rating, DO-41 package	Higher power but looser tolerance; requires larger PCB footprint	Select when higher continuous power (1 W) is needed and ±5% voltage accuracy is acceptable
BZX85C15	15 V nominal, ±5% tolerance, 1.3 W power rating, DO-41 package	Higher power and same nominal voltage, but wider tolerance and different thermal profile	Choose for cost-sensitive industrial supplies where ±5% regulation suffices and board space allows DO-41

Compared with BZX79-B15,133, the 1N4744A offers higher power but lacks precision and package compatibility, while BZX85C15 trades tolerance for power and thermal performance - making the BZX79-B15,133 optimal for space-constrained, accuracy-critical 15 V references.

Availability

BZX79-B15,133 is available at Aetrix Electronics and suitable for linear power supplies, sensor biasing circuits, overvoltage clamps, and microcontroller reset circuits requiring stable component supply and traceable sourcing.

Supply support for BZX79-B15,133 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 leader in discrete, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, and consumer markets with high-volume, high-reliability components.

The BZX79 series belongs to Nexperia's voltage regulator diode product line, engineered for low-power precision voltage referencing and stabilization in cost-sensitive, space-constrained applications.

FAQ

What is the maximum continuous power dissipation for BZX79-B15,133?

The BZX79-B15,133 has a maximum total power dissipation of 500 mW at ambient temperature ≤ 50 °C with leads mounted per standard PCB layout (no metallization pad, lead length ≤ 8 mm). At higher ambient temperatures, derating applies per its 380 K/W thermal resistance.

How does the temperature coefficient affect regulation accuracy?

The BZX79-B15,133 exhibits a typical temperature coefficient of +9.2 mV/K at 5 mA, meaning its Zener voltage increases ~9.2 mV per degree Celsius rise in junction temperature. This must be accounted for in high-precision applications above 25 °C ambient or under self-heating conditions.

Can BZX79-B15,133 replace BZX79-C15 in existing designs?

No - BZX79-C15 has ±5% tolerance (14.25–15.75 V), while BZX79-B15,133 has ±2% (14.7–15.3 V). Substituting requires verification that system-level regulation margin accommodates the tighter tolerance and identical thermal behavior under actual operating conditions.

What is the reverse leakage current at 10.5 V?

At V_R = 10.5 V (0.7 × V_Znom = 0.7 × 15 V), the maximum reverse leakage current is 50 nA, measured at T_j = 25 °C. This ultra-low leakage ensures minimal error current in high-impedance reference divider networks.

BZX79-B15,133 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Cut Tape (CT)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 15 V

Tolerance:: ±2%

Power - Max:: 400 mW

Impedance (Max) (Zzt):: 30 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 10.5 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: ALF2

BZX79-B15,133 FAQ

1.How can I place an order for BZX79-B15,133 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX79-B15,133 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 BZX79-B15,133 reliable?

The price and inventory of BZX79-B15,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B15,133 is usually 5 days.

3.What payment methods are accepted for BZX79-B15,133?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B15,133 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX79-B15,133?

BZX79-B15,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX79-B15,133 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 BZX79-B15,133?

For technical support, including BZX79-B15,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B15,133 requirements.

6.How does Aetrix verify that BZX79-B15,133 is sourced from the original manufacturer or authorized distributors?

All BZX79-B15,133 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 BZX79-B15,133 meets industry standards.

7.What is the process for return or replacement of BZX79-B15,133?

All BZX79-B15,133 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B15,133, 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 BZX79-B15,133 part is unused and in its original packaging.

Return procedure for BZX79-B15,133:

1.Submit a request within 90 days.

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

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