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Nexperia USA Inc. NZX27X,133
- Part No.:
- NZX27X,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
NZX27X,133.pdf
- Description:
- DIODE ZENER 27.69V 500MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:2,474
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Product details
Overview
NZX27X,133 from Nexperia is a single Zener diode in a hermetically sealed SOD27 (SC-40) glass package, designed for precision voltage regulation at 27 V nominal working voltage with ±5% tolerance (26.99–28.39 V), 80 Ω typical differential resistance at IZ = 2 mA, and ≤0.05 µA reverse leakage current. It delivers stable reference performance in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.
For engineers reviewing the NZX27X,133 datasheet, NZX27X,133 pinout, NZX27X,133 application, or NZX27X,133 equivalent, this device is selected for its low thermal resistance (Rth(j-a) = 380 K/W), axial-leaded glass construction enabling high reliability in temperature-critical environments, and tight Zener voltage distribution across production lots.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified test current of 2 mA per IEC 60134 limiting values, delivering a nominal 27 V regulation point with a temperature coefficient optimized for stability across −55 °C to +175 °C ambient range. Its hermetic SOD27 package ensures long-term parameter retention under humidity and thermal cycling stress.
The device exhibits low dynamic impedance (80 Ω typ.) and minimal leakage (<0.05 µA at VR = 18.9 V), making it suitable for low-current reference applications where power dissipation must remain below 500 mW and junction temperature stays within 175 °C. Thermal resistance from junction to ambient is characterized at 380 K/W on FR4 PCB without metallization pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 26.99 V min / 28.39 V max at IZ = 2 mA - defines precise regulation window for feedback or clamping |
| Differential Resistance rdif | 80 Ω typical at IZ = 2 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage IR | ≤0.05 µA at VR = 18.9 V - ensures negligible current draw in standby or high-impedance bias networks |
| Total Power Dissipation Ptot | 500 mW maximum at Ttp ≤25 °C - sets upper limit for continuous DC or pulsed operation |
| Junction Temperature Tj | −65 °C to +175 °C - supports operation in extended industrial and automotive-adjacent environments |
| Thermal Resistance Rth(j-a) | 380 K/W in free air - informs heatsinking requirements and derating curves for PCB layout |
Pinout & Package
The NZX27X,133 uses a two-terminal axial-leaded SOD27 (SC-40) hermetically sealed glass package. The cathode is marked by a colored band on the glass body; leads are untrimmed, intended for through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; reverse-biased during Zener operation |
| 2 (unbanded end) | Anode | Connected to ground or lower-potential rail; completes conduction path during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass packaging | Prevents moisture ingress and parameter drift over time, critical for long-life instrumentation |
| Low differential resistance | 80 Ω typical enables tight voltage regulation under varying load currents |
| Low leakage current | ≤0.05 µA minimizes error in high-impedance reference dividers and battery-powered circuits |
| Wide operating temperature range | −55 °C to +175 °C ambient allows use in under-hood, industrial control, and aerospace-qualified designs |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback loop using optocoupler-coupled TL431 replacement. IC Role / Device Role / Timing Role: Zener reference element setting precise threshold for error amplifier input. Use Value: 27 V nominal voltage provides margin above 24 V system rails while maintaining low rdif for stable loop gain. |
Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 24 V in industrial PLC input modules. IC Role / Device Role / Timing Role: Shunt clamp absorbing excess energy during ESD or inductive kick events. Use Value: Hermetic SOD27 construction ensures consistent clamping behavior after repeated 1 kV HBM events without parameter shift. |
| Reference Voltage Source | Current-Limited Bias Network |
Use Scenario: Generating stable 27 V reference for ADC driver stage in high-voltage data acquisition front-end. IC Role / Device Role / Timing Role: Precision voltage source feeding resistive divider into op-amp buffer. Use Value: ≤0.05 µA leakage avoids loading error in 10 MΩ+ divider arms, preserving accuracy. |
Use Scenario: Biasing gate of high-side MOSFET in discrete DC-DC controller using resistor-Zener network. IC Role / Device Role / Timing Role: Current-limiting and voltage-setting element in gate drive path. Use Value: 500 mW Ptot rating supports 18 mA continuous current at 27 V, sufficient for most discrete gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55-C27 | Plastic DO-35 package; 5% tolerance; 100 Ω rdif at 5 mA; higher leakage (≤5 µA) | Lower cost but reduced long-term stability and thermal performance vs. hermetic glass | Select when cost sensitivity outweighs lifetime reliability in non-critical consumer applications |
| 1N5251B | DO-35 plastic; 5% tolerance; 35 Ω rdif at 20 mA; requires higher test current for spec compliance | Higher power handling (500 mW same) but inferior low-current regulation due to higher IR (≤5 µA) | Prefer only when circuit can sustain ≥20 mA Zener current and leakage is not design-critical |
Compared with BZX55-C27 and 1N5251B, NZX27X,133 offers superior long-term stability via hermetic sealing, tighter low-current regulation (2 mA test), and sub-µA leakage-making it optimal for precision, high-reliability, or thermally constrained designs where parameter consistency matters.
Availability
NZX27X,133 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning circuits, and programmable logic controller (PLC) input protection requiring stable component supply with guaranteed long-lifecycle support.
Supply support for NZX27X,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 specializing in high-performance, reliable discrete and logic devices, with leadership in automotive-grade and industrial power semiconductors.
The NZX series targets general-purpose Zener regulation with emphasis on hermetic reliability, wide temperature operation, and tight parametric distribution-designed for applications demanding long-term stability without recalibration.
FAQ
What is the Zener test current for NZX27X,133 and why does it matter?
The specified Zener voltage is measured at IZ = 2 mA, per Table 9 in the datasheet. This low test current enables accurate characterization in low-power reference circuits and ensures minimal self-heating during measurement. Operating significantly above or below this current alters VZ due to temperature and dynamic resistance effects.
Can NZX27X,133 be used in surface-mount designs?
No-it is an axial-leaded SOD27 (SC-40) through-hole device with 25.4 mm lead spacing and no SMT-compatible variant. Its glass body and lead geometry require manual or wave soldering into plated-through holes; reflow or paste printing is not supported.
How does the hermetic SOD27 package improve reliability versus plastic DO-35 Zeners?
The hermetic glass seal prevents moisture diffusion and oxidation at the PN junction, eliminating parameter drift over time and under humid or thermal cycling conditions. Plastic DO-35 packages allow gradual moisture ingress, leading to increased leakage and VZ shift after years of field operation.
What is the maximum allowable forward current for NZX27X,133?
The absolute maximum forward current is 250 mA (Table 5), but forward conduction is not a functional mode-this rating exists only for surge survivability during polarity reversal. Continuous forward bias degrades Zener characteristics and is not recommended in normal operation.
NZX27X,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):
- 27.69 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 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
NZX27X,133 FAQ
1.How can I place an order for NZX27X,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for NZX27X,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 NZX27X,133 reliable?
The price and inventory of NZX27X,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZX27X,133 is usually 5 days.
3.What payment methods are accepted for NZX27X,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZX27X,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NZX27X,133?
NZX27X,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NZX27X,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 NZX27X,133?
For technical support, including NZX27X,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZX27X,133 requirements.
6.How does Aetrix verify that NZX27X,133 is sourced from the original manufacturer or authorized distributors?
All NZX27X,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 NZX27X,133 meets industry standards.
7.What is the process for return or replacement of NZX27X,133?
All NZX27X,133 units undergo pre-shipment inspection (PSI). If there is an issue with NZX27X,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 NZX27X,133 part is unused and in its original packaging.
Return procedure for NZX27X,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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