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

Nexperia USA Inc. NZX16B,133

Name: NZX16B,133
Brand: Nexperia USA Inc.
SKU: NZX16B,133
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NZX16B,133

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: NZX16B,133.pdf

Description:: DIODE ZENER 16.1V 500MW ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:9,093

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Product details

Overview

NZX16B,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 16 V nominal working voltage with ±5% tolerance (15.3 V to 16.5 V), 45 Ω typical differential resistance at I_Z = 5 mA, and ≤0.05 µA reverse leakage current at V_R = 11.2 V. It supports general-purpose regulation in low-power analog circuits, power supply feedback paths, and overvoltage protection clamping.

For engineers reviewing the NZX16B,133 datasheet, NZX16B,133 pinout, NZX16B,133 application, or NZX16B,133 equivalent, this device is selected for stable 16 V Zener reference performance under 5 mA test current, low thermal resistance (380 K/W junction-to-ambient), and axial-leaded through-hole mounting compatibility with FR4 PCBs - critical for industrial sensor signal conditioning and legacy board designs.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 16 V at I_Z = 5 mA, exhibiting a temperature coefficient near zero in the 15–18 V range per Nexperia's characteristic curves. Its low differential resistance (45 Ω typ.) ensures minimal output voltage variation under load current changes.

The device uses an axial-leaded, hermetically sealed glass package (SOD27/SC-40) with cathode indicated by a band, enabling reliable operation from −65 °C to +175 °C storage and −55 °C to +175 °C ambient. Thermal resistance from junction to ambient is 380 K/W in free air on FR4 without copper pad.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	15.3 V to 16.5 V at I_Z = 5 mA - defines precise regulation threshold for feedback or clamp circuits
Differential Resistance (r_dif)	45 Ω typical at I_Z = 5 mA - determines output impedance and voltage stability under varying load
Reverse Leakage Current (I_R)	≤0.05 µA at V_R = 11.2 V - ensures negligible standby power loss in high-impedance bias networks
Total Power Dissipation (P_tot)	500 mW maximum at T_tp ≤ 25 °C - sets safe continuous DC or pulsed power handling limit
Junction Temperature (T_j)	−65 °C to +175 °C - enables use in extended-temperature industrial and automotive-adjacent environments
Thermal Resistance (R_th(j-a))	380 K/W in free air on FR4 - informs derating requirements for ambient temperature rise

Pinout & Package

Package: SOD27 (SC-40), hermetically sealed axial-leaded glass package with cathode marked by a colored band. Dimensions: 4.25 mm max length × 1.85 mm max diameter; lead spacing 25.4 mm min; lead diameter ≤0.56 mm.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; polarity marker (band) identifies this terminal for correct orientation in series-shunt regulation
2	Anode	Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction

Key Features

Feature	Design Value
Hermetic glass sealing	Prevents moisture ingress and long-term parameter drift in humid or harsh environments
Low differential resistance	45 Ω typical ensures <±10 mV output shift per 1 mA load change - critical for stable reference accuracy
Low leakage current	≤0.05 µA at 11.2 V enables use in ultra-low-power biasing and battery-backed circuits
Wide operating temperature range	−55 °C to +175 °C ambient rating supports deployment in motor control, power conversion, and industrial PLC modules

Applications

Power Supply Feedback Regulation

Sensor Signal Conditioning Reference

Use Scenario: Used in TL431-based or discrete op-amp feedback loops to set output voltage in AC/DC adapters and DC/DC converters.

IC Role / Device Role / Timing Role: Provides stable 16 V reference for error amplifier comparison against sampled output voltage.

Use Value: Tight 15.3–16.5 V tolerance and low r_dif minimize output voltage drift across line/load/temperature variations.

Use Scenario: Supplies bias voltage to bridge sensors or instrumentation amplifiers in industrial transmitters.

IC Role / Device Role / Timing Role: Acts as a low-drift, low-noise shunt reference for excitation or level-shifting circuits.

Use Value: ≤0.05 µA leakage avoids loading high-impedance sensor outputs; hermetic seal prevents calibration drift in field-deployed units.

Overvoltage Clamp Protection

Microcontroller I/O Pin Protection

Use Scenario: Placed across sensitive inputs (e.g., ADC references or communication lines) to clamp transient surges.

IC Role / Device Role / Timing Role: Shunts excess energy above 16 V to ground during ESD or inductive kick events.

Use Value: 500 mW P_tot and fast response enable robust clamping without thermal runaway in repetitive surge conditions.

Use Scenario: Connected between MCU GPIO and ground to protect against accidental 24 V miswiring or back-EMF coupling.

IC Role / Device Role / Timing Role: Limits pin voltage to ≤16.5 V while drawing minimal quiescent current during normal operation.

Use Value: Low leakage preserves input logic thresholds; axial leads simplify hand-soldering onto prototype or repair boards.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55-C16	Plastic DO-35 package; 16 V ±5%; r_dif = 50 Ω; I_R ≤ 0.1 µA at 12.2 V	Lower cost but higher leakage and plastic encapsulation reduces long-term stability in humid environments	Select when cost sensitivity outweighs hermetic reliability and ultra-low leakage requirements
1N4744A	DO-41 package; 15 V ±5%; r_dif = 16 Ω; P_tot = 1 W; I_R ≤ 5 µA at 12 V	Higher power rating and lower r_dif, but larger footprint and higher leakage limit use in precision low-current circuits	Select when >500 mW dissipation or sub-20 Ω impedance is required, accepting larger size and reduced leakage performance

Compared with BZX55-C16 and 1N4744A, NZX16B,133 offers superior long-term stability via hermetic sealing and lowest leakage among 16 V Zeners, making it optimal for precision analog references where environmental robustness and microamp-level bias integrity are mandatory.

Availability

NZX16B,133 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, overvoltage protection circuits, and legacy through-hole board replacements requiring stable component supply and traceable sourcing.

Supply support for NZX16B,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 robustness for industrial, automotive, and consumer markets.

The NZX series targets general-purpose Zener regulation with hermetic reliability and tight parametric control, specifically engineered for applications demanding long-term voltage reference stability in non-automotive industrial environments.

FAQ

What is the Zener voltage tolerance and test condition for NZX16B,133?

The nominal Zener voltage is 16 V with a tolerance of ±5%, measured at I_Z = 5 mA and T_j = 25 °C. The actual working range is 15.3 V to 16.5 V under these conditions, as confirmed in Table 8 of the Nexperia datasheet Rev. 4.

Can NZX16B,133 be used in surface-mount designs?

No - NZX16B,133 uses an axial-leaded SOD27 (SC-40) glass package intended for through-hole mounting only. It lacks solder pads or terminations compatible with reflow or wave soldering processes used in SMT assembly.

What is the maximum forward voltage and at what current is it specified?

The forward voltage is specified as ≤1.5 V at I_F = 200 mA, per Table 1 and Table 7 in the datasheet. This value applies only during forward conduction and is not relevant to normal Zener regulation operation.

How does the thermal resistance affect derating at elevated ambient temperatures?

With R_th(j-a) = 380 K/W on FR4, power must be linearly derated above 25 °C ambient: P_max = 500 mW × (1 − (T_amb − 25)/150). At 75 °C ambient, maximum allowable dissipation drops to 333 mW to maintain T_j ≤ 175 °C.

NZX16B,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):: 16.1 V

Tolerance:: ±2%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 45 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 11.2 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

NZX16B,133 FAQ

1.How can I place an order for NZX16B,133 through Aetrix?

Please submit a Request for Quotation (RFQ) for NZX16B,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 NZX16B,133 reliable?

The price and inventory of NZX16B,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZX16B,133 is usually 5 days.

3.What payment methods are accepted for NZX16B,133?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZX16B,133 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NZX16B,133?

NZX16B,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NZX16B,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 NZX16B,133?

For technical support, including NZX16B,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZX16B,133 requirements.

6.How does Aetrix verify that NZX16B,133 is sourced from the original manufacturer or authorized distributors?

All NZX16B,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 NZX16B,133 meets industry standards.

7.What is the process for return or replacement of NZX16B,133?

All NZX16B,133 units undergo pre-shipment inspection (PSI). If there is an issue with NZX16B,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 NZX16B,133 part is unused and in its original packaging.

Return procedure for NZX16B,133:

1.Submit a request within 90 days.

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

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