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

Nexperia USA Inc. NZX30B,133

Name: NZX30B,133
Brand: Nexperia USA Inc.
SKU: NZX30B,133
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NZX30B,133

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: NZX30B,133.pdf

Description:: DIODE ZENER 29.9V 500MW ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:8,790

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Product details

Overview

NZX30B,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 30 V nominal Zener voltage with ±5% tolerance, 100 Ω typical differential resistance at I_Z = 2 mA, and ≤0.05 µA reverse leakage current. It operates across −65 °C to +175 °C ambient range and supports general-purpose regulation in low-power analog circuits, power supply feedback paths, and overvoltage protection clamping.

For engineers reviewing the NZX30B,133 datasheet, NZX30B,133 pinout, NZX30B,133 application, or NZX30B,133 equivalent, this device is selected for stable 30 V Zener regulation under low-current bias conditions (IZ = 2 mA), where thermal stability, low leakage, and hermetic reliability are critical - especially in industrial sensor interfaces and legacy power rail monitoring.

Technical Context

The NZX30B,133 implements a silicon planar Zener junction optimized for stable reverse-breakdown operation at 30 V (V_Z = 29.2–30.6 V at I_Z = 2 mA), with temperature coefficient behavior characterized across 25–150 °C. Its low 100 Ω differential resistance ensures minimal output voltage variation under load shifts.

Thermal performance is defined by R_th(j-a) = 380 K/W in free air on FR4 PCB (8 mm lead length), limiting continuous power dissipation to 500 mW at T_amb ≤ 25 °C. The axial-leaded SOD27 package enables through-hole mounting with cathode polarity marked by a band.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	29.2 V to 30.6 V at I_Z = 2 mA - defines precise clamping threshold for 30 V rail regulation
Differential Resistance (r_dif)	100 Ω max at I_Z = 2 mA - ensures <±30 mV output shift per ±3 mA current change
Reverse Leakage (I_R)	≤0.05 µA at V_R = 21 V - guarantees negligible standby current in high-impedance reference nodes
Total Power Dissipation (P_tot)	500 mW max at T_tp ≤ 25 °C - sets absolute upper limit for continuous DC power handling
Junction Temperature (T_j)	−65 °C to +175 °C - enables operation in extended-temperature industrial environments
Package	SOD27 (SC-40) - hermetically sealed axial glass package with cathode band marking

Pinout & Package

SOD27 (SC-40) is a small hermetically sealed glass axial-leaded package with 2 terminals; cathode is identified by a colored band on the body.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; reverse-biased terminal during Zener operation
2	Anode	Connected to ground or lower-potential reference; forward conduction path when biased positively

Key Features

Feature	Design Value
Hermetic glass sealing	Prevents moisture ingress and long-term parameter drift in humid or harsh environments
Low differential resistance	100 Ω max ensures tight voltage regulation under varying load currents
Low leakage current	≤0.05 µA at 21 V enables use in ultra-low-power reference and sensing circuits
Wide operating temperature range	−65 °C to +175 °C supports deployment in automotive under-hood, industrial motor control, and outdoor equipment

Applications

Industrial Sensor Signal Conditioning

Legacy Power Supply Feedback Loop

Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter ICs in process automation transmitters.

IC Role / Device Role / Timing Role: Zener diode provides fixed 30 V reference for op-amp biasing and DAC output scaling.

Use Value: Low 0.05 µA leakage avoids loading high-impedance sensor front-end stages; hermetic seal prevents calibration drift in humid factory environments.

Use Scenario: Voltage sensing node in flyback converter feedback path for 24 V output regulation.

IC Role / Device Role / Timing Role: Clamps optocoupler input voltage to protect against transient overvoltage during load dump events.

Use Value: 100 Ω r_dif maintains stable 30 V clamp despite ±2 mA current variations from optocoupler CTR spread.

Overvoltage Protection Clamp

Microcontroller Reset Circuit Reference

Use Scenario: Secondary-side overvoltage clamp protecting downstream logic from 33 V surge events on 30 V rails.

IC Role / Device Role / Timing Role: Fast-acting shunt element that conducts above 30.6 V to divert excess energy to ground.

Use Value: Hermetic SOD27 construction sustains repeated surge clamping without parameter degradation or leakage increase.

Use Scenario: Generating a clean 30 V reference for external reset supervisor ICs monitoring 28 V system rails.

IC Role / Device Role / Timing Role: Provides stable, low-drift Zener voltage to set reset threshold independent of supply ripple.

Use Value: −65 °C to +175 °C rating ensures reliable reset assertion across full industrial temperature cycling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55-C30 (ON Semiconductor)	V_Z = 28.5–31.5 V (±5%), r_dif = 100 Ω max at I_Z = 5 mA, P_tot = 500 mW, DO-35 package	Higher test current (5 mA vs. 2 mA) yields different dynamic impedance curve; DO-35 has slightly higher R_th(j-a)	Select when existing layout uses DO-35 footprint and 5 mA bias is available
1N4749A (Vishay)	V_Z = 28.5–31.5 V (±5%), r_dif = 35 Ω max at I_Z = 20 mA, P_tot = 1 W, DO-41 package	Lower r_dif but requires 20 mA bias; 1 W rating demands larger PCB copper area for thermal management	Select only if higher power margin and tighter regulation under heavy load are required

Compared with BZX55-C30 and 1N4749A, NZX30B,133 offers superior low-current regulation (2 mA test point), hermetic reliability, and optimized thermal resistance for compact industrial PCBs - making it preferred for space-constrained, low-bias, high-stability applications.

Availability

NZX30B,133 is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy power supply feedback loops, and overvoltage protection clamps requiring stable component supply, long-term parametric consistency, and hermetic reliability.

Supply support for NZX30B,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 focus on efficiency, miniaturization, and robustness for industrial, automotive, and consumer markets.

The NZX series targets general-purpose Zener regulation with hermetic glass packaging, emphasizing long-term stability, low leakage, and wide temperature operation - specifically engineered for analog reference and protection functions in demanding environments.

FAQ

What is the maximum reverse voltage (V_R) before breakdown for NZX30B,133?

The rated Zener voltage is specified at 29.2–30.6 V under 2 mA test current. Breakdown begins near the lower limit (29.2 V), with full regulation established above 29.5 V. The device is not rated for sustained operation below its specified V_Z range - reverse voltage below 21 V yields ≤0.05 µA leakage, per datasheet Table 9.

Can NZX30B,133 be used in surface-mount designs?

No - NZX30B,133 uses the axial-leaded SOD27 (SC-40) glass package, designed exclusively for through-hole mounting. Its leads are not compatible with reflow soldering or pick-and-place automation. For SMT alternatives, consider Nexperia's BZX384-B30 (SOD-323) or BZX84-C30 (SOT-23), which differ in power rating, leakage, and thermal performance.

How does temperature affect the Zener voltage of NZX30B,133?

At 30 V nominal, NZX30B,133 exhibits a positive temperature coefficient (TC) of approximately +12 mV/K near I_Z = 2 mA, as shown in Figure 4 of the datasheet. This means V_Z increases ~12 mV per °C rise in junction temperature - critical for precision references where thermal gradients must be minimized or compensated.

Is NZX30B,133 suitable for automotive applications?

No - the NZX_SER datasheet explicitly states "Non-automotive qualified products" and confirms no AEC-Q101 qualification or automotive-specific testing. Its temperature range (−65 °C to +175 °C) exceeds automotive ambient requirements, but reliability validation, PPAP documentation, and failure rate data are not provided for automotive use cases.

NZX30B,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):: 29.9 V

Tolerance:: ±2%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 21 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

NZX30B,133 FAQ

1.How can I place an order for NZX30B,133 through Aetrix?

Please submit a Request for Quotation (RFQ) for NZX30B,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 NZX30B,133 reliable?

The price and inventory of NZX30B,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZX30B,133 is usually 5 days.

3.What payment methods are accepted for NZX30B,133?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZX30B,133 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NZX30B,133?

NZX30B,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NZX30B,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 NZX30B,133?

For technical support, including NZX30B,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZX30B,133 requirements.

6.How does Aetrix verify that NZX30B,133 is sourced from the original manufacturer or authorized distributors?

All NZX30B,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 NZX30B,133 meets industry standards.

7.What is the process for return or replacement of NZX30B,133?

All NZX30B,133 units undergo pre-shipment inspection (PSI). If there is an issue with NZX30B,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 NZX30B,133 part is unused and in its original packaging.

Return procedure for NZX30B,133:

1.Submit a request within 90 days.

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

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