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

Nexperia USA Inc. NZX4V7B,133

Name: NZX4V7B,133
Brand: Nexperia USA Inc.
SKU: NZX4V7B,133
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NZX4V7B,133

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: NZX4V7B,133.pdf

Description:: DIODE ZENER 4.6V 500MW ALF2

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Inventory:9,738

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Product details

Overview

NZX4V7B,133 from Nexperia is a single Zener diode in a hermetically sealed SOD27 (SC-40) glass package, designed for precision voltage regulation at 4.7 V nominal Zener voltage with ±5% tolerance. It delivers 5 mA test current, 100 Ω typical differential resistance, ≤3 µA reverse leakage at 2 V, and 500 mW total power dissipation - deployed in low-power analog reference and overvoltage clamp circuits.

For engineers reviewing the NZX4V7B,133 datasheet, NZX4V7B,133 pinout, NZX4V7B,133 application, or NZX4V7B,133 equivalent, this component serves as a stable, low-leakage, axial-leaded Zener solution for fixed-voltage reference generation, ESD protection clamping, and supply rail stabilization in space-constrained industrial and consumer PCBs.

Technical Context

This Zener diode operates in reverse breakdown mode with a tightly controlled 4.5 V to 4.7 V working voltage range at I_Z = 5 mA, exhibiting low temperature coefficient behavior optimized for stable regulation across −55 °C to +175 °C ambient conditions. Its hermetic glass package ensures long-term parameter stability and moisture immunity critical for high-reliability applications.

The device features low thermal resistance (R_th(j-a) = 380 K/W in free air) and supports pulsed operation up to 300 µs with duty cycle ≤0.02, enabling transient suppression without thermal runaway. Its axial lead configuration and cathode band marking simplify manual and automated assembly on FR4 PCBs.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.5 V to 4.7 V at I_Z = 5 mA - defines precise regulation point for reference circuits
Differential Resistance (r_dif)	≤100 Ω - ensures minimal output voltage shift under load variation
Reverse Leakage (I_R)	≤3 µA at V_R = 2 V - enables low-power standby operation and high-impedance sensing
Total Power Dissipation (P_tot)	500 mW at T_tp ≤ 25 °C - sets maximum continuous DC or pulsed power handling capability
Junction Temperature (T_j)	−55 °C to +175 °C - supports operation in harsh industrial and automotive-adjacent environments
Forward Voltage (V_F)	≤1.5 V at I_F = 200 mA - confirms robust forward conduction for bidirectional clamp configurations
Thermal Resistance (R_th(j-a))	380 K/W in free air - determines self-heating rise per watt, critical for derating in enclosed assemblies

Pinout & Package

Package: SOD27 (SC-40), hermetically sealed axial-leaded glass package with 25.4 mm minimum lead length and 4.25 mm max body diameter. Cathode identified by black band.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs
2	Anode	Connected to ground or lower-potential rail; completes bias path during regulation

Key Features

Feature	Design Value
Hermetic Glass Encapsulation	Prevents moisture ingress and parametric drift over time, ensuring long-term Zener voltage stability
Low Differential Resistance	≤100 Ω maintains tight regulation under varying load currents without external compensation
Low Reverse Leakage Current	≤3 µA at 2 V enables use in ultra-low-power monitoring and battery-backed circuits
Wide Operating Temperature Range	−55 °C to +175 °C junction rating supports deployment in engine control units and industrial motor drives
Axial Leaded SOD27 Form Factor	Enables through-hole mounting and manual rework compatibility while maintaining small footprint

Applications

Power Supply Reference

Overvoltage Clamp

Use Scenario: Providing stable 4.7 V reference for ADC biasing or op-amp feedback networks in sensor signal conditioning modules.

IC Role / Device Role / Timing Role: Voltage reference element establishing precise DC offset independent of input rail fluctuations.

Use Value: Enables <±0.5% measurement accuracy in 12-bit analog front-ends without trimming or active regulation.

Use Scenario: Clamping transient surges on 5 V logic rails caused by inductive switching or ESD events.

IC Role / Device Role / Timing Role: Passive shunt protector diverting excess energy to ground before IC damage thresholds are exceeded.

Use Value: Limits peak voltage to ≤5.2 V during 1 kV HBM ESD strikes, preserving downstream CMOS inputs.

Temperature-Stable Bias Generator

Low-Power Microcontroller Reset Circuit

Use Scenario: Generating a temperature-compensated bias voltage for precision current sources in analog transmitters.

IC Role / Device Role / Timing Role: Zener-based reference node with predictable TC behavior across −40 °C to +85 °C operating range.

Use Value: Delivers <±10 mV drift over full industrial temperature range, eliminating need for TC compensation circuitry.

Use Scenario: Holding microcontroller reset line low until 3.3 V supply stabilizes during cold start in battery-powered IoT nodes.

IC Role / Device Role / Timing Role: Threshold detector combined with RC timing network to generate clean power-on reset pulse.

Use Value: Ensures reliable reset assertion for >100 ms with <1 µA quiescent current draw during sleep mode.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55-C4V7	Plastic DO-35 package; 5% tolerance; 4.5–4.9 V range; higher r_dif (≤120 Ω); R_th(j-a) = 500 K/W	Lower cost but reduced thermal performance and long-term stability in humid environments	Select when cost sensitivity outweighs hermetic reliability requirements and board-level airflow is sufficient
1N4732A	DO-41 package; 5% tolerance; 4.46–4.94 V range; r_dif = 9 Ω; P_tot = 1 W; R_th(j-a) = 50 K/W	Higher power handling and lower impedance, but larger footprint and non-hermetic construction	Choose for higher-current regulation (>100 mA) where thermal management via heatsinking is feasible

Compared with BZX55-C4V7 and 1N4732A, NZX4V7B,133 offers superior long-term parameter stability due to hermetic sealing and optimized low-leakage design, making it preferred for precision references in uncontrolled environments - though its 500 mW rating and 100 Ω impedance suit moderate-load, space-constrained applications better than high-power or ultra-low-impedance use cases.

Availability

NZX4V7B,133 is available at Aetrix Electronics and suitable for power supply reference generation, overvoltage clamping, temperature-stable biasing, and low-power microcontroller reset circuits requiring stable component supply and traceable sourcing.

Supply support for NZX4V7B,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 semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, miniaturization, and sustainability.

The NZX series targets general-purpose Zener regulation with hermetic reliability, serving industrial, consumer, and computing applications where long-term voltage stability and environmental resilience are essential.

FAQ

What is the maximum continuous reverse current the NZX4V7B,133 can sustain without degradation?

The NZX4V7B,133 is rated for a maximum total power dissipation of 500 mW at T_tp ≤ 25 °C. At its nominal Zener voltage of 4.7 V, this corresponds to a maximum continuous reverse current of approximately 106 mA (500 mW ÷ 4.7 V). Derating is required above 25 °C ambient per its 380 K/W thermal resistance.

How does the cathode band marking align with standard PCB silkscreen conventions?

The black cathode band on the NZX4V7B,133 aligns with industry-standard axial diode marking: it identifies Pin 1 (cathode), which must be routed to the higher-potential node in Zener regulation mode. PCB silkscreen should place the band symbol adjacent to the designated cathode pad, matching the device's physical orientation during placement.

Can NZX4V7B,133 be used in series or parallel configurations for higher voltage or current handling?

Series connection is viable for higher Zener voltage (e.g., two NZX4V7B,133 yield ~9.4 V), provided matched units are selected to avoid voltage imbalance. Parallel use is not recommended due to manufacturing spread in V_Z and r_dif, leading to current hogging and thermal instability - discrete current-sharing resistors would be required.

Is NZX4V7B,133 compliant with RoHS and REACH regulations?

Yes, NZX4V7B,133 is RoHS-compliant (lead-free terminations, homogeneous material compliance) and REACH-conformant per Nexperia's published declarations. The SOD27 glass package contains no restricted substances above threshold limits, and full compliance documentation is available via Nexperia's product portal using the 12NC ordering code.

NZX4V7B,133 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: NZX

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

Packaging:: Cut Tape (CT)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 4.6 V

Tolerance:: ±2%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 3 µA @ 2 V

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 200 mA

Operating Temperature:: -55°C ~ 175°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: ALF2

NZX4V7B,133 FAQ

1.How can I place an order for NZX4V7B,133 through Aetrix?

Please submit a Request for Quotation (RFQ) for NZX4V7B,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 NZX4V7B,133 reliable?

The price and inventory of NZX4V7B,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZX4V7B,133 is usually 5 days.

3.What payment methods are accepted for NZX4V7B,133?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZX4V7B,133 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NZX4V7B,133?

NZX4V7B,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NZX4V7B,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 NZX4V7B,133?

For technical support, including NZX4V7B,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZX4V7B,133 requirements.

6.How does Aetrix verify that NZX4V7B,133 is sourced from the original manufacturer or authorized distributors?

All NZX4V7B,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 NZX4V7B,133 meets industry standards.

7.What is the process for return or replacement of NZX4V7B,133?

All NZX4V7B,133 units undergo pre-shipment inspection (PSI). If there is an issue with NZX4V7B,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 NZX4V7B,133 part is unused and in its original packaging.

Return procedure for NZX4V7B,133:

1.Submit a request within 90 days.

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

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