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

Nexperia USA Inc. BZX79-C4V7,133

Name: BZX79-C4V7,133
Brand: Nexperia USA Inc.
SKU: BZX79-C4V7,133
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX79-C4V7,133

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX79-C4V7,133.pdf

Description:: DIODE ZENER 4.7V 400MW ALF2

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Product details

Overview

BZX79-C4V7,133 from Nexperia is a ±5% tolerance Zener voltage regulator diode with nominal 4.7 V breakdown voltage at 5 mA test current, 425 Ω typical differential resistance, and −1.4 mV/K temperature coefficient. It operates in low-power stabilization circuits requiring stable reference voltages under 500 mW total dissipation in SOD27 (DO-35) glass packages.

For engineers reviewing the BZX79-C4V7,133 datasheet, BZX79-C4V7,133 pinout, BZX79-C4V7,133 application, or BZX79-C4V7,133 equivalent, this part serves as a cost-optimized, through-hole Zener reference for power supply feedback, overvoltage clamping, and analog signal conditioning where ±5% voltage tolerance is acceptable.

Technical Context

This Zener diode functions via controlled reverse-biased avalanche breakdown, delivering a stable reference voltage across its cathode-anode terminals when reverse current exceeds the knee threshold. Its −1.4 mV/K temperature coefficient indicates slight negative drift with rising junction temperature, optimized for operation near room temperature.

Designed for DC and low-frequency stabilization, it supports non-repetitive surge handling up to 40 W for 100 μs pulses and maintains ≤3 μA reverse leakage at VR = 2 V, enabling reliable use in battery-powered and low-quiescent-current designs.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	4.7 V at I_Z = 5 mA - defines primary regulation point for feedback loops and voltage references
Voltage Tolerance	±5% (4.4 V to 5.0 V) - suitable for non-critical biasing and clamping where tight regulation is not required
Differential Resistance	425 Ω typ. at 5 mA - determines output impedance and load regulation sensitivity in shunt regulator topologies
Temperature Coefficient	−1.4 mV/K at 5 mA - quantifies voltage drift per degree Celsius, critical for thermal stability in unregulated environments
Max Power Dissipation	500 mW at T_amb = 50 °C - sets continuous DC power limit for PCB-mounted operation without heatsinking
Reverse Leakage Current	≤3 μA at V_R = 2 V - ensures minimal standby current in high-impedance sensing or battery backup paths
Package	SOD27 (DO-35) - hermetically sealed axial glass package with cathode band marking, compatible with wave soldering

Pinout & Package

SOD27 (DO-35) is a hermetically sealed axial-leaded glass package with cathode identified by a colored band. Leads are tinned copper-clad steel, rated for manual and automated through-hole assembly.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Forward conduction terminal / low-side reference node	Connected to ground or lower potential in shunt regulator configurations; carries forward current up to 250 mA
Cathode (banded end)	Zener breakdown terminal / regulated output node	Provides stable 4.7 V reference when reverse biased; must be connected to higher potential via current-limiting resistor

Key Features

Feature	Design Value
Hermetic glass encapsulation	Ensures long-term reliability and moisture resistance in industrial ambient conditions without conformal coating
Non-repetitive peak power rating	40 W for 100 μs pulses - enables transient overvoltage suppression in power supply input stages
E24 voltage standardization	Part of 37-type series covering 2.4 V–75 V - simplifies BOM consolidation across multiple design generations
Low-cost ±5% tolerance option	Reduces unit cost vs. ±2% BZX79-B variants while maintaining compatibility in non-precision applications

Applications

Power Supply Feedback

Overvoltage Clamp

Use Scenario: Regulating output voltage in linear regulators or switching converter feedback networks using resistive divider + Zener reference.

IC Role / Device Role / Timing Role: Provides stable 4.7 V reference for error amplifier comparison, replacing precision voltage references where cost is prioritized.

Use Value: Enables accurate output setpoint control within ±5% tolerance while reducing component count and bill-of-materials cost.

Use Scenario: Protecting microcontroller I/O pins or sensor inputs from ESD or supply rail transients exceeding safe operating limits.

IC Role / Device Role / Timing Role: Acts as passive shunt clamp, conducting excess energy to ground once input exceeds 4.7 V + forward drop.

Use Value: Limits voltage spikes to <5.6 V (including forward conduction), preventing latch-up or permanent damage in 5 V logic systems.

Reference Voltage Source

Analog Signal Conditioning

Use Scenario: Generating fixed bias points for op-amp comparators, ADC reference dividers, or transistor base drive circuits.

IC Role / Device Role / Timing Role: Supplies stable DC reference independent of supply variation, used in conjunction with resistors to scale or offset signals.

Use Value: Delivers repeatable 4.7 V node with ≤3 μA leakage, minimizing loading effects on high-impedance analog nodes.

Use Scenario: Level-shifting or clamping analog sensor outputs (e.g., thermistor bridges, photodiode amps) before ADC sampling.

IC Role / Device Role / Timing Role: Clips negative excursions or caps positive swing to defined 4.7 V ceiling, preserving dynamic range and preventing saturation.

Use Value: Maintains signal integrity with 425 Ω dynamic impedance, ensuring predictable clamping behavior across operating temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX79-B4V7,113	±2% tolerance (4.61–4.79 V), 425 Ω rdif, −1.4 mV/K SZ	Higher precision reference needed for feedback loops with tighter output tolerance requirements	Select when system-level output accuracy demands <±3% regulation or temperature drift compensation is implemented
1N4732A	4.7 V ±5%, 500 mW, DO-41 package, 15 Ω rdif at 20 mA	Larger DO-41 package, lower dynamic impedance but higher test current requirement	Choose for higher surge robustness or legacy board compatibility where SOD27 footprint is unavailable

Compared with BZX79-C4V7,133, the BZX79-B4V7,113 offers tighter voltage control at identical thermal and surge ratings, while the 1N4732A provides lower impedance regulation at higher bias current but requires larger board area and different thermal management.

Availability

BZX79-C4V7,133 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and analog reference voltage generation requiring stable component supply across industrial control, consumer electronics, and embedded instrumentation programs.

Supply support for BZX79-C4V7,133 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 standard Zener diode portfolio, engineered for cost-sensitive, through-hole voltage regulation and clamping in mass-produced electronic systems.

FAQ

What is the maximum continuous reverse current for BZX79-C4V7,133 at 25 °C?

The device does not specify a maximum continuous reverse current; instead, it defines maximum power dissipation (500 mW at 50 °C ambient). At 4.7 V, this corresponds to ~106 mA continuous Zener current. Operation above this level risks thermal runaway unless board-level cooling is enhanced.

Can BZX79-C4V7,133 be used in place of a 5 V logic-level shifter?

No - this Zener diode regulates voltage only in reverse breakdown and cannot actively translate logic levels. It may serve as a passive clamp to limit 5 V signals to ~4.7 V, but lacks bidirectional signal conditioning, speed, or drive capability required for true level shifting.

Is the SOD27 package RoHS compliant and lead-free?

Yes - Nexperia confirms the SOD27 package for BZX79-C4V7,133 meets RoHS Directive 2011/65/EU and is lead-free, with termination finish specified as matte tin (Sn) over nickel underplate per manufacturer documentation.

How does the −1.4 mV/K temperature coefficient affect performance at 85 °C ambient?

At 85 °C junction temperature (≈60 °C rise from 25 °C test condition), the Zener voltage shifts by approximately −84 mV (−1.4 × 60), resulting in ~4.616 V regulation. This drift is predictable and acceptable in applications where absolute accuracy is secondary to cost and simplicity.

BZX79-C4V7,133 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):: 4.7 V

Tolerance:: ±5%

Power - Max:: 400 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 3 µA @ 2 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-C4V7,133 FAQ

1.How can I place an order for BZX79-C4V7,133 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX79-C4V7,133 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-C4V7,133 reliable?

The price and inventory of BZX79-C4V7,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C4V7,133 is usually 5 days.

3.What payment methods are accepted for BZX79-C4V7,133?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C4V7,133 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX79-C4V7,133?

BZX79-C4V7,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX79-C4V7,133 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-C4V7,133?

For technical support, including BZX79-C4V7,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C4V7,133 requirements.

6.How does Aetrix verify that BZX79-C4V7,133 is sourced from the original manufacturer or authorized distributors?

All BZX79-C4V7,133 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-C4V7,133 meets industry standards.

7.What is the process for return or replacement of BZX79-C4V7,133?

All BZX79-C4V7,133 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C4V7,133, 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-C4V7,133 part is unused and in its original packaging.

Return procedure for BZX79-C4V7,133:

1.Submit a request within 90 days.

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

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