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

Nexperia USA Inc. NZX4V3A,133

Name: NZX4V3A,133
Brand: Nexperia USA Inc.
SKU: NZX4V3A,133
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NZX4V3A,133

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: NZX4V3A,133.pdf

Description:: DIODE ZENER 4.1V 500MW ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:9,335

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Product details

Overview

NZX4V3A,133 from Nexperia is a single silicon Zener diode in a hermetically sealed SOD27 (SC-40) glass package, designed for precision voltage regulation at 4.3 V nominal Zener voltage with ±5% tolerance (4.1–4.3 V), 100 Ω typical differential resistance at I_Z = 5 mA, and ≤3 µA reverse leakage current. It operates across −65 °C to +175 °C ambient range and delivers stable clamping in low-power reference and protection circuits.

For engineers reviewing the NZX4V3A,133 datasheet, NZX4V3A,133 pinout, NZX4V3A,133 application, or NZX4V3A,133 equivalent, this component serves as a cost-effective, temperature-stable voltage reference for analog sensor biasing, overvoltage clamp in microcontroller I/O protection, and low-current power rail stabilization where axial-leaded reliability and hermetic sealing are required.

Technical Context

This Zener diode employs planar-diffused silicon junction technology optimized for tight voltage tolerance and low thermal drift. Its Zener breakdown mechanism operates in the 4–5 V range, where temperature coefficient crosses zero near 4.3 V, minimizing drift over −55 °C to +150 °C operating junction temperature.

The device features axial leads with cathode marked by a band, enabling unambiguous orientation on PCBs. Thermal resistance from junction to ambient is 380 K/W in free air on FR4 without copper pad, limiting continuous dissipation to 500 mW at T_amb ≤ 25 °C per IEC 60134 absolute maximum ratings.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.1–4.3 V at I_Z = 5 mA - defines precise clamping threshold for 3.3 V/5 V system references
Differential Resistance (r_dif)	≤100 Ω - ensures minimal output voltage variation under load current changes
Reverse Leakage Current (I_R)	≤3 µA at V_R = 1 V - guarantees low standby power loss in battery-sensitive designs
Total Power Dissipation (P_tot)	500 mW max at T_tp ≤ 25 °C - sets upper limit for continuous DC or pulsed regulation duty
Junction Temperature (T_j)	−65 °C to +175 °C - supports operation in harsh industrial and automotive under-hood environments
Forward Voltage (V_F)	≤1.5 V at I_F = 200 mA - enables use as low-drop rectifier or ESD path in dual-role configurations
Thermal Resistance (R_th(j-a))	380 K/W in free air - determines derating curve: usable power drops to ~250 mW at 75 °C ambient

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; polarity must be observed to enable Zener conduction
2	Anode	Connected to ground or lower-potential rail; forms reference return path for bias current

Key Features

Feature	Design Value
Hermetic Glass Encapsulation	Prevents moisture ingress and long-term parameter drift in humid or high-reliability environments
Low Differential Resistance	≤100 Ω ensures <10 mV output shift per 1 mA load change-critical for stable ADC reference dividers
Tight Zener Voltage Tolerance	±5% (4.1–4.3 V) enables direct replacement in legacy 4.3 V regulator designs without recalibration
Wide Operating Temperature Range	−65 °C to +175 °C junction rating supports deployment in industrial motor drives and outdoor telecom equipment
Low Reverse Leakage	≤3 µA at 1 V reverse bias minimizes quiescent current in always-on sensor bias networks

Applications

Industrial Sensor Signal Conditioning

Microcontroller I/O Protection

Use Scenario: Biasing a 3.3 V analog temperature sensor with stable reference voltage in factory-floor PLC modules.

IC Role / Device Role / Timing Role: Zener diode provides fixed 4.3 V reference for resistor-divider network feeding sensor excitation circuit.

Use Value: Low r_dif and <3 µA leakage maintain <0.5% reference error across −25 °C to +70 °C ambient, eliminating need for active reference IC.

Use Scenario: Clamping 5 V UART TX line against ESD transients in embedded gateway devices.

IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-signal line to shunt >5 V spikes before reaching MCU GPIO.

Use Value: Hermetic SOD27 package withstands repeated 8 kV HBM strikes without parameter shift; 500 mW rating absorbs 100 ns pulses without failure.

Low-Power Battery Monitor Reference

Legacy 5 V Rail Overvoltage Clamp

Use Scenario: Monitoring Li-ion cell voltage via resistive divider in portable medical monitors with 10-year shelf life requirement.

IC Role / Device Role / Timing Role: Zener establishes precision 4.3 V reference for comparator threshold detecting overcharge condition.

Use Value: ≤3 µA leakage extends 10-year battery life; −65 °C to +175 °C rating ensures calibration stability during accelerated aging tests.

Use Scenario: Protecting legacy 5 V logic rails in industrial HMIs from supply surges caused by relay coil flyback.

IC Role / Device Role / Timing Role: Placed between 5 V rail and ground to clamp transients above 4.3 V before they reach downstream LDOs.

Use Value: 100 Ω r_dif limits clamping voltage overshoot to <4.5 V during 1 A surge, preventing latch-up in 5 V CMOS ICs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55-C4V3	Plastic DO-35 package; 5% tolerance; 600 mW P_tot; r_dif ≤ 90 Ω	Lacks hermetic seal; higher moisture sensitivity; unsuitable for extended-life or high-humidity deployments	Select when cost is primary and environmental robustness is secondary; requires conformal coating in humid environments
1N4731A	DO-41 package; 5% tolerance; 1 W P_tot; r_dif ≤ 14 Ω; wider V_Z spread (4.14–4.46 V)	Higher power handling but larger footprint; tighter r_dif benefits precision references but increases cost	Select when >500 mW surge energy absorption is needed or when board space permits larger axial package

Compared with BZX55-C4V3 and 1N4731A, NZX4V3A,133 uniquely balances hermetic reliability, compact SOD27 form factor, and 4.3 V zero-TC point-making it optimal for long-lifecycle industrial sensors and sealed enclosure applications where parameter stability outweighs raw power rating.

Availability

NZX4V3A,133 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller I/O protection, low-power battery monitor reference, and legacy 5 V rail overvoltage clamp requiring stable component supply across multi-year production cycles.

Supply support for NZX4V3A,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, reliability, and miniaturization.

The NZX series targets general-purpose Zener regulation in harsh environments, emphasizing hermetic sealing, wide temperature capability, and tight voltage tolerance for industrial and automotive-adjacent applications.

FAQ

What is the maximum continuous Zener current for NZX4V3A,133 at 75 °C ambient?

At 75 °C ambient, thermal derating reduces the usable power to approximately 250 mW. With V_Z = 4.3 V, the maximum continuous Zener current is ~58 mA. This assumes free-air mounting on FR4 without copper pour; adding thermal relief pads improves current capacity by lowering R_th(j-a).

Does NZX4V3A,133 have a specified temperature coefficient?

Yes-the temperature coefficient crosses zero near 4.3 V, resulting in minimal drift over −55 °C to +150 °C. Typical data shows ±2 mV/K deviation at I_Z = 5 mA, making it suitable for applications where reference stability across temperature is critical without active compensation.

Can NZX4V3A,133 be used in place of a 3.3 V Zener diode?

No-it is rated for 4.3 V nominal Zener voltage and will not regulate reliably at 3.3 V. Attempting to force conduction below its breakdown threshold results in high dynamic impedance and unpredictable leakage. For 3.3 V regulation, use NZX3V3A,133 (3.2–3.4 V range) instead.

Is the SOD27 package compatible with standard axial-leaded automated insertion equipment?

Yes-the SOD27 (SC-40) package has 25.4 mm minimum lead length and 0.56 mm max lead diameter, meeting IPC-7351 requirements for axial tape-and-reel feeders. The -133 packing code indicates 52 mm reel pack, fully compatible with high-speed placement systems using standard axial nozzles.

NZX4V3A,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):: 4.1 V

Tolerance:: ±2%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 3 µA @ 1 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

NZX4V3A,133 FAQ

1.How can I place an order for NZX4V3A,133 through Aetrix?

Please submit a Request for Quotation (RFQ) for NZX4V3A,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 NZX4V3A,133 reliable?

The price and inventory of NZX4V3A,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZX4V3A,133 is usually 5 days.

3.What payment methods are accepted for NZX4V3A,133?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZX4V3A,133 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NZX4V3A,133?

NZX4V3A,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NZX4V3A,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 NZX4V3A,133?

For technical support, including NZX4V3A,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZX4V3A,133 requirements.

6.How does Aetrix verify that NZX4V3A,133 is sourced from the original manufacturer or authorized distributors?

All NZX4V3A,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 NZX4V3A,133 meets industry standards.

7.What is the process for return or replacement of NZX4V3A,133?

All NZX4V3A,133 units undergo pre-shipment inspection (PSI). If there is an issue with NZX4V3A,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 NZX4V3A,133 part is unused and in its original packaging.

Return procedure for NZX4V3A,133:

1.Submit a request within 90 days.

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

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