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Nexperia USA Inc. NZX20A,133
- Part No.:
- NZX20A,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
NZX20A,133.pdf
- Description:
- DIODE ZENER 19.25V 500MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:9,730
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Product details
Overview
NZX20A,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 20 V nominal Zener voltage with ±5% tolerance (18.8–20.4 V), 60 Ω typical differential resistance at IZ = 2 mA, and ≤0.05 µA reverse leakage current. It delivers stable regulation in low-power analog circuits, power supply feedback paths, and overvoltage protection nodes.
For engineers reviewing the NZX20A,133 datasheet, NZX20A,133 pinout, NZX20A,133 application, or NZX20A,133 equivalent, this component supports design verification of Zener-based voltage clamping, reference stability under varying load conditions, thermal derating on FR4 PCBs, and axial-leaded discrete selection for legacy or high-reliability board layouts.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 20 V at 2 mA test current, exhibiting low dynamic impedance (60 Ω typ.) to maintain tight regulation across small current variations. Its hermetic glass package ensures long-term parameter stability and minimal moisture-induced drift.
Thermal performance is defined for mounting on FR4 PCB without metallization pad (lead length ≤8 mm), yielding Rth(j-a) = 380 K/W and Rth(j-t) = 300 K/W - critical for ambient temperature operation up to +175 °C and junction temperature limits of 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–20.4 V at IZ = 2 mA - defines precise clamping threshold for 20 V nominal systems |
| Differential Resistance (rdif) | 60 Ω typical - ensures <±0.12 V output shift per ±1 mA current change near regulation point |
| Reverse Leakage Current (IR) | ≤0.05 µA at VR = 14 V - minimizes standby power loss in high-impedance bias networks |
| Total Power Dissipation (Ptot) | 500 mW maximum at Ttp ≤25 °C - sets safe DC operating limit before thermal derating applies |
| Junction Temperature Range (Tj) | −65 to +175 °C - enables deployment in extended industrial or under-hood environments |
| Package Type | SOD27 (SC-40) - axial-leaded, hermetically sealed glass housing for moisture resistance and long-term parametric stability |
Pinout & Package
The NZX20A,133 uses a two-terminal axial-leaded SOD27 (SC-40) hermetically sealed glass package. The cathode is identified by a colored band on the glass body; leads are unmarked but polarity follows standard diode convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node or voltage reference point; accepts reverse bias for Zener conduction |
| 2 (non-banded end) | Anode | Connected to ground or lower-potential rail; completes reverse-biased path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents parameter drift due to humidity ingress, supporting >20-year shelf life and field reliability in harsh environments |
| Low differential resistance | 60 Ω typical at 2 mA enables <±1% output voltage variation across ±5 mA load transients |
| Low leakage current | ≤0.05 µA at 14 V allows use in nanoampere-level biasing circuits without compromising accuracy |
| High junction temperature rating | 175 °C max junction temperature supports operation in thermally constrained enclosures or near heat sources |
Applications
| Power Supply Feedback Loop | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing output voltage in linear regulator feedback networks using TL431 or discrete op-amp comparators. IC Role / Device Role / Timing Role: Provides precise 20 V reference voltage for error amplifier input, enabling ±1% output regulation. Use Value: Low rdif and tight VZ tolerance minimize loop gain variation and improve transient response fidelity. |
Use Scenario: Protecting microcontroller I/O pins from ESD or surge events exceeding 20 V. IC Role / Device Role / Timing Role: Acts as shunt clamp, conducting excess energy to ground when input exceeds 20.4 V. Use Value: Hermetic packaging ensures consistent clamping behavior after repeated surges without parameter degradation. |
| Reference Voltage Source | Current-Limited Bias Network |
Use Scenario: Generating stable bias for analog front-end amplifiers or ADC reference dividers. IC Role / Device Role / Timing Role: Supplies low-noise, temperature-stable 20 V reference to precision resistor networks. Use Value: ≤0.05 µA leakage avoids loading high-impedance divider nodes, preserving accuracy in 12-bit+ systems. |
Use Scenario: Setting fixed bias current for LED drivers or transistor base circuits. IC Role / Device Role / Timing Role: Functions as constant-voltage element in series with current-setting resistor. Use Value: 60 Ω rdif ensures <±2% current variation across ±10% supply fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55-C20 (ON Semiconductor) | Same 20 V nominal, ±5% tolerance, but plastic DO-35 package; rdif = 50 Ω typ., IR = 0.1 µA at 14 V | Lower cost and higher volume availability, but reduced long-term stability vs. hermetic glass | Select for cost-sensitive consumer designs where moisture exposure is controlled |
| 1N4740A (onsemi) | 20 V nominal, ±5%, DO-41 package; Ptot = 1 W, rdif = 22 Ω, IR = 5 µA at 16 V | Higher power handling and lower impedance, but larger footprint and higher leakage compromises low-power use | Select when >500 mW dissipation or sub-22 Ω regulation is required, accepting larger size and leakage penalty |
Compared with BZX55-C20 and 1N4740A, NZX20A,133 offers superior long-term parameter stability via hermetic sealing and ultra-low leakage ideal for precision biasing, while trading off power capacity and cost for reliability-critical industrial or aerospace subsystems.
Availability
NZX20A,133 is available at Aetrix Electronics and suitable for voltage reference generation, overvoltage clamping, and power supply feedback loops requiring stable component supply with traceable sourcing and long-lifecycle support.
Supply support for NZX20A,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 focused on high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.
The NZX series targets general-purpose Zener regulation in demanding environments, emphasizing hermetic stability, wide temperature operation, and consistency across 112 voltage grades from 2.1 V to 36 V.
FAQ
What is the maximum continuous forward current for NZX20A,133?
The absolute maximum forward current is 250 mA per Table 5. However, forward conduction is not its intended operating mode; sustained forward bias above 1.5 V at 200 mA risks thermal overstress and parameter shift due to lack of forward-rated thermal design. Use only in reverse breakdown for regulation.
How does the SOD27 package affect thermal performance on FR4 PCBs?
Mounted on FR4 without metallization and with ≤8 mm lead length, NZX20A,133 achieves Rth(j-a) = 380 K/W. This means a 500 mW dissipation raises junction temperature by 190 K above ambient - requiring derating to ~260 mW at 70 °C ambient to stay within the 175 °C Tj limit.
Can NZX20A,133 replace NZX20B or NZX20C in existing designs?
Yes - all share identical 20 V nominal voltage range (NZX20A: 18.8–19.7 V, NZX20B: 19.5–20.4 V, NZX20C: 20.2–21.2 V), same SOD27 package, and matching electrical specs. Substitution requires verifying that the tighter tolerance of the selected variant meets system margin requirements.
Is NZX20A,133 suitable for automotive applications?
No - the datasheet explicitly states "Non-automotive qualified products" and confirms no AEC-Q200 qualification or automotive testing. Its 175 °C Tj rating does not equate to automotive qualification; use only in industrial, commercial, or medical equipment where automotive-grade reliability is not mandated.
NZX20A,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):
- 19.25 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 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
NZX20A,133 FAQ
1.How can I place an order for NZX20A,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for NZX20A,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 NZX20A,133 reliable?
The price and inventory of NZX20A,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZX20A,133 is usually 5 days.
3.What payment methods are accepted for NZX20A,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZX20A,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NZX20A,133?
NZX20A,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NZX20A,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 NZX20A,133?
For technical support, including NZX20A,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZX20A,133 requirements.
6.How does Aetrix verify that NZX20A,133 is sourced from the original manufacturer or authorized distributors?
All NZX20A,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 NZX20A,133 meets industry standards.
7.What is the process for return or replacement of NZX20A,133?
All NZX20A,133 units undergo pre-shipment inspection (PSI). If there is an issue with NZX20A,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 NZX20A,133 part is unused and in its original packaging.
Return procedure for NZX20A,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NZX20A,133 Tags
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