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

Nexperia USA Inc. NZX12A,133

Name: NZX12A,133
Brand: Nexperia USA Inc.
SKU: NZX12A,133
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NZX12A,133

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: NZX12A,133.pdf

Description:: DIODE ZENER 11.65V 500MW ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:6,141

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Product details

Overview

NZX12A,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 12 V nominal working voltage with ±5% tolerance, 35 Ω typical differential resistance at I_Z = 5 mA, and ≤0.1 µA reverse leakage current at V_R = 9.8 V - used in low-power analog reference circuits and overvoltage protection clamping.

For engineers reviewing the NZX12A,133 datasheet, NZX12A,133 pinout, NZX12A,133 application, or NZX12A,133 equivalent, this part supports stable 12 V regulation in space-constrained industrial sensor interfaces, legacy power supply feedback paths, and ESD-tolerant signal conditioning stages where low thermal resistance (R_th(j-a) = 380 K/W) and hermetic reliability are critical.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 12 V (min 11.4 V, max 12.1 V at I_Z = 5 mA), exhibiting low dynamic impedance (35 Ω typ.) and tight temperature coefficient behavior optimized for stable DC reference generation across −55 °C to +175 °C ambient range.

Its axial-leaded SOD27 package enables direct through-hole mounting on FR4 PCBs without thermal pads, delivering 500 mW total power dissipation capability under T_amb ≤ 25 °C conditions and maintaining junction temperature below 175 °C during continuous operation.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	12 V nominal (11.4–12.1 V min/max at I_Z = 5 mA); defines precise clamping threshold for regulation and protection circuits.
Differential Resistance (r_dif)	35 Ω typical at I_Z = 5 mA; ensures minimal output voltage variation under load current changes.
Reverse Leakage Current (I_R)	≤0.1 µA at V_R = 9.8 V; guarantees negligible standby power loss in high-impedance reference nodes.
Total Power Dissipation (P_tot)	500 mW maximum at T_tp ≤ 25 °C; sets safe continuous operating limit for through-hole mounted designs.
Junction Temperature (T_j)	−65 °C to +175 °C operating range; supports deployment in extended-temperature industrial environments.
Thermal Resistance (R_th(j-a))	380 K/W in free air; determines self-heating rise per watt, critical for derating in enclosed enclosures.

Pinout & Package

Hermetically sealed axial-leaded SOD27 (SC-40) glass package with 2 mm diameter body and 25.4 mm lead length; cathode identified by black band.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs.
2	Anode	Connected to ground or lower-potential rail; completes bias path for controlled conduction.

Key Features

Feature	Design Value
Hermetic glass sealing	Prevents moisture ingress and long-term parameter drift in humid or corrosive environments.
Low differential resistance	35 Ω typical enables <±10 mV output shift per 0.3 mA load change - suitable for precision references.
Low leakage current	≤0.1 µA at 9.8 V allows use in ultra-low-power battery-backed circuits without measurable drain.
Wide temperature range	Operates reliably from −55 °C to +175 °C junction temperature - validated for industrial control modules.

Applications

Industrial Sensor Signal Conditioning

Legacy Power Supply Feedback

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 12 V reference for op-amp biasing and DAC output scaling.

Use Value: Hermetic SOD27 construction prevents calibration drift over 10+ years in field-deployed instrumentation.

Use Scenario: Voltage sensing node in flyback converter feedback loop using TL431-based optocoupler interface.

IC Role / Device Role / Timing Role: Clamps error amplifier input to 12 V to prevent saturation during overvoltage events.

Use Value: 35 Ω r_dif ensures <±50 mV regulation error across full load transient range.

ESD-Tolerant Analog Front-End Protection

Low-Power Microcontroller Reset Circuit

Use Scenario: Secondary clamping stage after TVS diode in RS-485 transceiver protection network.

IC Role / Device Role / Timing Role: Absorbs residual energy post-TVSP and holds line voltage at 12 V during fast transients.

Use Value: 500 mW P_tot rating handles repetitive 10/1000 µs surge pulses without degradation.

Use Scenario: Generating clean 12 V reset threshold for older 8-bit MCUs with external reset supervisor ICs.

IC Role / Device Role / Timing Role: Supplies stable reference to MAX809-type supervisor enabling accurate brown-out detection.

Use Value: ≤0.1 µA I_R avoids loading weak pull-up networks in battery-powered sleep modes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55-C12	Plastic DO-35 package; 12 V ±5%, r_dif = 40 Ω typ., I_R = 0.1 µA at 9.1 V	Limited to −65 °C to +150 °C; higher R_th(j-a) (500 K/W) reduces power handling in confined spaces	Select when cost sensitivity outweighs hermetic reliability and extended temperature needs.
1N4742A	DO-41 package; 12 V ±5%, r_dif = 9 Ω typ., I_R = 5 µA at 9.1 V, P_tot = 1 W	Higher leakage and larger footprint; requires thermal relief for >300 mW operation	Choose only if higher power margin is required and board space permits larger axial package.

Compared with BZX55-C12 and 1N4742A, NZX12A,133 delivers superior long-term stability via hermetic sealing, tighter thermal performance in compact layouts, and lower leakage - making it optimal for mission-critical industrial references where recalibration intervals must exceed 15 years.

Availability

NZX12A,133 is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy power supply feedback loops, and ESD-tolerant analog front-ends requiring stable component supply with guaranteed traceability and long-lifecycle support.

Supply support for NZX12A,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, with leadership in automotive-qualified and industrial-grade components.

The NZX series targets general-purpose Zener regulation in harsh environments, emphasizing hermetic reliability, wide temperature operation, and consistent parametric stability for industrial and infrastructure applications.

FAQ

What is the exact Zener voltage tolerance for NZX12A,133 at 5 mA test current?

The NZX12A,133 has a nominal Zener voltage of 12 V with a guaranteed range of 11.4 V (minimum) to 12.1 V (maximum) when measured at I_Z = 5 mA and T_j = 25 °C, corresponding to ±5% tolerance as defined in Table 8 of the Nexperia datasheet Rev. 4.

Can NZX12A,133 be used in surface-mount designs?

No - NZX12A,133 uses an axial-leaded SOD27 (SC-40) glass package intended exclusively for through-hole mounting; it lacks solder pads or terminations compatible with reflow or wave soldering processes. Surface-mount alternatives require different part numbers such as PZM12NB or BZX84-C12.

What is the maximum forward voltage drop at 200 mA?

The forward voltage (V_F) is specified as ≤1.5 V at I_F = 200 mA and T_j = 25 °C per Table 1 and Table 7; this value reflects conduction in forward bias and is relevant only for non-Zener-mode applications like polarity protection.

How does the thermal resistance affect power derating above 25 °C ambient?

With R_th(j-a) = 380 K/W, each 1 °C rise in ambient temperature above 25 °C reduces allowable power dissipation by 2.63 mW (500 mW ÷ 380 K/W); full derating to zero occurs at T_amb ≈ 140 °C assuming no heatsinking or airflow.

NZX12A,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):: 11.65 V

Tolerance:: ±2%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 35 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 8 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

NZX12A,133 FAQ

1.How can I place an order for NZX12A,133 through Aetrix?

Please submit a Request for Quotation (RFQ) for NZX12A,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 NZX12A,133 reliable?

The price and inventory of NZX12A,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZX12A,133 is usually 5 days.

3.What payment methods are accepted for NZX12A,133?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZX12A,133 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NZX12A,133?

NZX12A,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NZX12A,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 NZX12A,133?

For technical support, including NZX12A,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZX12A,133 requirements.

6.How does Aetrix verify that NZX12A,133 is sourced from the original manufacturer or authorized distributors?

All NZX12A,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 NZX12A,133 meets industry standards.

7.What is the process for return or replacement of NZX12A,133?

All NZX12A,133 units undergo pre-shipment inspection (PSI). If there is an issue with NZX12A,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 NZX12A,133 part is unused and in its original packaging.

Return procedure for NZX12A,133:

1.Submit a request within 90 days.

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

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