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

Nexperia USA Inc. NZX3V3B,133

Name: NZX3V3B,133
Brand: Nexperia USA Inc.
SKU: NZX3V3B,133
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NZX3V3B,133

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: NZX3V3B,133.pdf

Description:: DIODE ZENER 3.3V 500MW ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:9,008

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Product details

Overview

NZX3V3B,133 from Nexperia is a single Zener diode in a hermetically sealed SOD27 (SC-40) glass package, designed for precision voltage regulation and reference functions at 3.3 V nominal Zener voltage. It delivers 5 mA test current, ≤100 Ω differential resistance, <5 µA reverse leakage at 5 mA, and 500 mW total power dissipation - suitable for low-power analog biasing, overvoltage clamping, and voltage reference circuits in industrial sensor interfaces and power supply feedback paths.

For engineers reviewing the NZX3V3B,133 datasheet, NZX3V3B,133 pinout, NZX3V3B,133 application, or NZX3V3B,133 equivalent, key selection criteria include its 3.2–3.4 V working voltage range at I_Z = 5 mA, axial-leaded SOD27 thermal performance (R_th(j-a) = 380 K/W), cathode-marked polarity, and compatibility with FR4 PCB mounting without metallization pads.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled V_Z tolerance (±5% for 'B' grade), specified at I_Z = 5 mA and T_j = 25 °C. Its low differential resistance (≤100 Ω) ensures stable regulation under small load variations, while low leakage (<5 µA at 5 mA) minimizes standby current draw in battery-powered systems.

The device uses a glass-encapsulated axial lead structure with defined thermal resistance characteristics: R_th(j-a) = 380 K/W (free air) and R_th(j-t) = 300 K/W (junction-to-tie-point), enabling predictable thermal behavior on standard FR4 boards with ≤8 mm lead length.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	3.2 V to 3.4 V at I_Z = 5 mA - defines precise regulation threshold for 3.3 V rail stabilization
Differential Resistance r_dif	≤100 Ω - ensures minimal output voltage shift under ±1 mA load current variation
Reverse Leakage I_R	<5 µA at V_R = 1 V - enables ultra-low quiescent current in always-on reference circuits
Total Power Dissipation P_tot	500 mW at T_tp ≤ 25 °C - supports continuous operation up to 150 mA at 3.3 V in ambient-limited conditions
Junction Temperature T_j	−65 °C to +175 °C - allows deployment in extended-temperature industrial environments
Forward Voltage V_F	≤1.5 V at I_F = 200 mA - confirms robust forward conduction capability for bidirectional protection use cases

Pinout & Package

Package: SOD27 (SC-40), hermetically sealed axial-leaded glass package with 2 leads; marking band denotes cathode.

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 reference; establishes polarity for proper biasing

Key Features

Feature	Design Value
Hermetic glass sealing	Prevents moisture ingress and long-term parameter drift in humid or corrosive environments
Low differential resistance	≤100 Ω ensures <±33 mV regulation error across ±1 mA load change at 3.3 V
Tight V_Z tolerance	±5% ('B' grade) enables accurate 3.3 V reference without external trimming
High junction temperature rating	175 °C maximum T_j supports reliable operation in thermally constrained enclosures

Applications

Industrial Sensor Signal Conditioning

Low-Power Microcontroller Voltage Reference

Use Scenario: Stabilizing reference voltage for 12-bit ADC inputs in temperature/humidity transmitters.

IC Role / Device Role / Timing Role: Zener diode provides fixed 3.3 V reference to ADC VREF pin, replacing higher-cost precision voltage references.

Use Value: Enables <±0.5% full-scale accuracy without calibration, leveraging 3.2–3.4 V V_Z tolerance and low r_dif.

Use Scenario: Supplying stable bias voltage to internal LDOs or brown-out detectors in battery-operated IoT nodes.

IC Role / Device Role / Timing Role: Functions as primary voltage reference for reset circuitry and supply monitoring logic.

Use Value: Delivers <5 µA leakage at 1 V reverse bias, extending shelf life and runtime in sleep modes.

DC-DC Feedback Divider Clamp

ESD-Sensitive Interface Protection

Use Scenario: Clamping feedback node of isolated flyback converter to prevent overregulation during transient load steps.

IC Role / Device Role / Timing Role: Acts as shunt regulator across upper resistor of feedback divider to limit maximum output voltage.

Use Value: 500 mW P_tot handles short-duration surges without degradation; 380 K/W R_th(j-a) ensures safe thermal margin.

Use Scenario: Protecting UART/RS-485 transceiver pins against induced transients in factory automation wiring.

IC Role / Device Role / Timing Role: Placed anode-to-ground, cathode-to-line to clamp positive ESD events to 3.4 V.

Use Value: Fast response (<1 ns) and low dynamic impedance provide sub-3.5 V clamping level, meeting IEC 61000-4-2 Level 4.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55C3V3,113	V_Z = 3.2–3.4 V (same tolerance), but plastic DO-35 package; R_th(j-a) = 500 K/W	Lower thermal performance limits continuous power to ~300 mW on FR4; less stable in high-temp environments	Select when cost sensitivity outweighs thermal reliability; avoid in sealed enclosures above 70 °C ambient
MMBZ5226BS,215	SOT-23 surface-mount package; V_Z = 3.3 V ±5%, r_dif = 17 Ω (lower), but P_tot = 300 mW	Enables high-density PCB layouts but requires reflow-compatible assembly; unsuitable for >100 mA surge handling	Choose for space-constrained designs needing tighter regulation; verify thermal relief for >200 mA peak currents

Compared with BZX55C3V3,113 and MMBZ5226BS,215, NZX3V3B,133 offers superior thermal stability (380 K/W vs. 500/600 K/W) and higher surge power handling (500 mW vs. 300 mW), making it preferred for industrial-grade analog references where long-term drift and ambient temperature extremes matter.

Availability

NZX3V3B,133 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, low-power microcontroller voltage reference, DC-DC feedback divider clamp, and ESD-sensitive interface protection requiring stable component supply and long-term parametric consistency.

Supply support for NZX3V3B,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 devices, with leadership in automotive and industrial power efficiency solutions.

The NZX series targets general-purpose Zener regulation in harsh environments, emphasizing hermetic reliability, tight voltage tolerance, and thermal robustness for analog reference and protection roles.

FAQ

What is the maximum continuous reverse current this Zener can handle at 3.3 V?

The NZX3V3B,133 is rated for 500 mW total power dissipation at T_tp ≤ 25 °C. At its nominal 3.3 V Zener voltage, this corresponds to a maximum continuous reverse current of approximately 151 mA (500 mW ÷ 3.3 V). Derating applies above 25 °C ambient per its 380 K/W thermal resistance.

Does this part meet automotive qualification standards?

No. The NZX3V3B,133 is not automotive-qualified. The datasheet explicitly states that unless otherwise indicated, Nexperia products are not qualified or tested to automotive standards (e.g., AEC-Q101). It is intended for industrial, consumer, and general-purpose applications only.

How is polarity identified on the NZX3V3B,133 package?

Polarity is marked by a visible band on the glass body - this band indicates the cathode terminal (Pin 1). The unmarked end is the anode (Pin 2). This marking aligns with standard diode convention and is verified in the official Nexperia pinning diagram (Figure 2, Product Data Sheet Rev. 4).

Can this Zener be used in forward conduction mode?

Yes. The datasheet specifies a forward voltage V_F ≤ 1.5 V at I_F = 200 mA, confirming usable forward conduction. However, its primary design intent is reverse-bias Zener operation; forward use is limited to protection or dual-purpose clamping, not rectification or switching.

NZX3V3B,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):: 3.3 V

Tolerance:: ±3%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 5 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

NZX3V3B,133 FAQ

1.How can I place an order for NZX3V3B,133 through Aetrix?

Please submit a Request for Quotation (RFQ) for NZX3V3B,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 NZX3V3B,133 reliable?

The price and inventory of NZX3V3B,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZX3V3B,133 is usually 5 days.

3.What payment methods are accepted for NZX3V3B,133?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZX3V3B,133 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NZX3V3B,133?

NZX3V3B,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NZX3V3B,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 NZX3V3B,133?

For technical support, including NZX3V3B,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZX3V3B,133 requirements.

6.How does Aetrix verify that NZX3V3B,133 is sourced from the original manufacturer or authorized distributors?

All NZX3V3B,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 NZX3V3B,133 meets industry standards.

7.What is the process for return or replacement of NZX3V3B,133?

All NZX3V3B,133 units undergo pre-shipment inspection (PSI). If there is an issue with NZX3V3B,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 NZX3V3B,133 part is unused and in its original packaging.

Return procedure for NZX3V3B,133:

1.Submit a request within 90 days.

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

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