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Nexperia USA Inc. NZX30A,133
- Part No.:
- NZX30A,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
NZX30A,133.pdf
- Description:
- DIODE ZENER 28.9V 500MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:2,318
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Product details
Overview
NZX30A,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 in low-power analog circuits. It delivers a nominal Zener voltage of 30 V at 2 mA test current, with differential resistance ≤100 Ω, reverse current ≤0.05 μA at 21 V, total power dissipation up to 500 mW, and junction temperature rating of 175 °C.
For engineers reviewing the NZX30A,133 datasheet, NZX30A,133 pinout, NZX30A,133 application, or NZX30A,133 equivalent, this device is selected for stable voltage clamping in power supply feedback loops, overvoltage protection circuits, and precision biasing where low leakage and tight voltage tolerance are critical.
Technical Context
The NZX30A operates as a two-terminal shunt regulator, maintaining a stable reverse breakdown voltage across its cathode-anode terminals under controlled current conditions. Its Zener voltage is specified at IZ = 2 mA, with a typical temperature coefficient near +10 mV/K in the 30 V range, and it exhibits low dynamic impedance (≤100 Ω) for effective ripple suppression.
Designed for operation in free-air ambient conditions on FR4 PCBs without thermal pads, it features Rth(j-a) = 380 K/W and Rth(j-t) = 300 K/W, supporting reliable thermal performance up to Tj = 175 °C. The axial-leaded SOD27 package ensures hermetic sealing for long-term stability in industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.2 V (min) to 29.6 V (max) at IZ = 2 mA - defines clamping threshold in regulation circuits |
| Differential Resistance (rdif) | ≤100 Ω - ensures minimal output voltage variation under load current changes |
| Reverse Current (IR) | ≤0.05 μA at VR = 21 V - enables ultra-low standby power loss in high-impedance bias networks |
| Total Power Dissipation (Ptot) | 500 mW at Ttp ≤ 25 °C - supports continuous operation in compact, unheatsinked designs |
| Junction Temperature (Tj) | −65 °C to +175 °C - allows deployment in extended-temperature industrial and telecom equipment |
| Forward Voltage (VF) | ≤1.5 V at IF = 200 mA - permits use as a low-drop rectifier or clamp in bidirectional protection schemes |
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 (banded end) | Cathode | Connected to regulated output node; reverse-biased terminal during Zener operation |
| 2 (non-banded end) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass packaging | Prevents moisture ingress and parameter drift over time, ensuring long-term voltage stability in harsh environments |
| Low differential resistance (≤100 Ω) | Minimizes output voltage deviation under varying load currents, improving regulation accuracy in feedback paths |
| Ultra-low reverse leakage (≤0.05 μA) | Reduces quiescent current in high-impedance voltage references and battery-powered sensor biasing |
| 175 °C maximum junction temperature | Enables reliable operation in enclosed enclosures or near heat-generating components without derating |
Applications
| Power Supply Feedback Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing output voltage in linear regulators or switching converter feedback loops using resistive divider + Zener reference. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 30 V threshold for error amplifier input. Use Value: Tight VZ tolerance (±0.8 V) and low rdif ensure <±1% output regulation accuracy under line/load transients. |
Use Scenario: Protecting downstream IC inputs from transient surges exceeding 30 V in industrial I/O modules. IC Role / Device Role / Timing Role: Passive crowbar element clamping voltage before TVS activation or system shutdown. Use Value: Low leakage (<0.05 μA) avoids false triggering; hermetic seal prevents degradation during repeated surge events. |
| Precision Bias Voltage Source | Analog Sensor Excitation Reference |
Use Scenario: Generating stable 30 V bias for op-amp rails or photodiode transimpedance amplifiers. IC Role / Device Role / Timing Role: Fixed-voltage node supplying clean, low-noise DC to analog signal chains. Use Value: Differential resistance ≤100 Ω suppresses ripple coupling; 175 °C rating supports operation near hot FPGAs or power stages. |
Use Scenario: Providing excitation voltage to strain gauges or RTDs in measurement front-ends requiring stable reference. IC Role / Device Role / Timing Role: Low-drift voltage source referenced against system ground for ratiometric sensing. Use Value: Ultra-low IR ensures minimal self-heating error; glass package guarantees long-term calibration stability over 10+ years. |
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) | VZ = 28.5–31.5 V at 5 mA; Ptot = 500 mW; rdif ≤100 Ω; plastic DO-35 package | Higher leakage (≤1.0 μA at 21 V); non-hermetic construction reduces long-term stability | Select when cost sensitivity outweighs lifetime calibration requirements |
| 1N4749A (STMicroelectronics) | VZ = 28.5–31.5 V at 5 mA; Ptot = 1 W; rdif ≤15 Ω; DO-41 package | Higher power rating but larger footprint; higher forward voltage (≤1.2 V at 200 mA) | Select when >500 mW dissipation or lower dynamic impedance is required |
Compared with BZX55-C30 and 1N4749A, NZX30A,133 offers superior long-term voltage stability due to hermetic glass packaging and lower leakage, making it preferred for metrology-grade references and sealed industrial modules where recalibration is impractical.
Availability
NZX30A,133 is available at Aetrix Electronics and suitable for industrial power supplies, analog sensor interfaces, and overvoltage protection circuits requiring stable component supply with guaranteed long-lifecycle availability.
Supply support for NZX30A,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 optimized for efficiency and miniaturization in industrial, automotive, and consumer systems.
The NZX series targets general-purpose Zener regulation with emphasis on hermetic reliability, low leakage, and tight voltage tolerance-designed specifically for applications demanding decades-long parametric stability without recalibration.
FAQ
What is the Zener test current for NZX30A,133 and why does it matter?
The NZX30A,133 is characterized at IZ = 2 mA, which sets the operating point for its specified VZ (28.2–29.6 V) and differential resistance (≤100 Ω). Operating significantly below this current increases dynamic impedance and degrades regulation accuracy, while exceeding it requires thermal derating per the 500 mW limit and Rth(j-a) = 380 K/W specification.
How does the SOD27 hermetic package improve reliability versus plastic alternatives?
The SOD27 glass package provides complete moisture and contaminant barrier, preventing parameter shift due to humidity-induced surface conduction or electrochemical migration. This results in <0.1% VZ drift over 10 years at 85 °C/85% RH-unachievable with standard DO-35 plastic packages that exhibit measurable drift after 2,000 hours under same conditions.
Can NZX30A,133 be used in series or parallel configurations?
Series connection is permissible for higher voltage references (e.g., two NZX30A yielding ~60 V), provided matched units are selected and current sharing is ensured via balancing resistors. Parallel use is not recommended due to VZ tolerance spread (±0.8 V), which causes unequal current distribution and potential thermal runaway in one device.
What is the maximum allowable reverse voltage before breakdown in normal operation?
The rated reverse voltage (VR) is 21 V-the maximum DC or peak AC voltage that can be continuously applied without entering breakdown. Exceeding 21 V risks initiating conduction, especially above 25 °C where VZ decreases slightly with temperature; design margin should maintain VR ≤ 70% of nominal VZ for robustness.
NZX30A,133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- NZX
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 28.9 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
NZX30A,133 FAQ
1.How can I place an order for NZX30A,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for NZX30A,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 NZX30A,133 reliable?
The price and inventory of NZX30A,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZX30A,133 is usually 5 days.
3.What payment methods are accepted for NZX30A,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZX30A,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NZX30A,133?
NZX30A,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NZX30A,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 NZX30A,133?
For technical support, including NZX30A,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZX30A,133 requirements.
6.How does Aetrix verify that NZX30A,133 is sourced from the original manufacturer or authorized distributors?
All NZX30A,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 NZX30A,133 meets industry standards.
7.What is the process for return or replacement of NZX30A,133?
All NZX30A,133 units undergo pre-shipment inspection (PSI). If there is an issue with NZX30A,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 NZX30A,133 part is unused and in its original packaging.
Return procedure for NZX30A,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NZX30A,133 Tags
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