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

onsemi 1N6006B_T50R

Name: 1N6006B_T50R
Brand: onsemi
SKU: 1N6006B_T50R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N6006B_T50R

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N6006B_T50R.pdf

Description:: DIODE ZENER 18V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:4,645

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Product details

Overview

1N6006B_T50R from Fairchild Semiconductor is a 5% tolerance, 18 V nominal Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 4.0 mW/°C derating, designed for precision voltage regulation and reference applications in industrial power supplies and analog signal conditioning circuits.

For engineers reviewing the 1N6006B_T50R datasheet, pinout, applications, or equivalent options, this page delivers verified Zener voltage (17.1–18.9 V), test current (5 mA), dynamic impedance (42 Ω @ IZ), leakage current (0.1 mA @ 14 V), and maximum Zener current (42 mA) - all confirmed from Fairchild's official Rev. C2 specification.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and line conditions. Its 18 V nominal rating, 5% tolerance, and low dynamic impedance (42 Ω at 5 mA) enable accurate voltage clamping and reference generation in feedback loops and overvoltage protection circuits.

The device uses a DO-35 glass axial package with cathode band marking, supports junction temperatures from –65°C to +200°C, and exhibits 0.1 mA leakage current at 14 V reverse bias - critical for low-power standby and precision analog designs where quiescent current must be tightly controlled.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	17.1 V min / 18.9 V max @ 5 mA - defines regulation window for stable 18 V reference under nominal bias
Power Dissipation (P_D)	500 mW @ T_L ≤ 75°C - sets maximum continuous thermal load on PCB without heatsinking
Zener Impedance (Z_Z)	42 Ω @ I_Z = 5 mA - determines output voltage variation under load current changes
Leakage Current (I_R)	0.1 mA @ V_R = 14 V - ensures minimal error current in high-impedance reference nodes
Max Zener Current (I_ZM)	42 mA - establishes absolute upper limit for safe DC conduction in regulation mode
Operating Temp Range	–65°C to +200°C - enables deployment in automotive under-hood and industrial motor control environments

Pinout & Package

DO-35 glass axial package with cathode indicated by color band; two-terminal device requiring no orientation-specific PCB layout beyond standard axial lead placement.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground	Connected to circuit ground or lower-potential node in shunt regulation configuration
Cathode	Reverse-biased Zener terminal / regulated output node	Connected to input supply via series resistor; provides stable 18 V reference to load

Key Features

Feature	Design Value
5% Zener voltage tolerance	Ensures predictable regulation accuracy without post-production trimming in cost-sensitive designs
Low dynamic impedance (42 Ω)	Maintains <±0.5 V output deviation across 1–10 mA load current swings in feedback networks
DO-35 glass package	Provides hermetic sealing and long-term stability for high-reliability industrial and telecom applications
0.1 mA leakage at 14 V	Minimizes error current in high-gain op-amp reference buffers and battery-powered sensor interfaces

Applications

Voltage Reference for Op-Amp Circuits	Overvoltage Clamp in Power Supply Rails
Use Scenario: Precision 18 V reference for instrumentation amplifier biasing and ADC reference buffers. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable excitation voltage independent of supply ripple. Use Value: 42 Ω Z_Z and 5% tolerance ensure <0.9 V total error budget over temperature and load in 12-bit measurement systems.	Use Scenario: Protection of 15 V logic rails against transient surges exceeding 20 V. IC Role / Device Role / Timing Role: Passive clamp limiting rail voltage to 18.9 V max during ESD or load-dump events. Use Value: 42 mA I_ZM and 500 mW P_D allow sustained clamping for >100 ms without thermal runaway.
Feedback Regulation in Switch-Mode PSUs	Threshold Detection in Analog Comparators
Use Scenario: Secondary-side voltage sensing in isolated flyback converters targeting 18 V output. IC Role / Device Role / Timing Role: Zener-based reference feeding optocoupler LED to close regulation loop. Use Value: Low 0.1 mA leakage preserves current transfer ratio stability across wide temperature range.	Use Scenario: Setting 18 V trip point for battery undervoltage lockout in portable equipment. IC Role / Device Role / Timing Role: Fixed threshold element in comparator hysteresis network. Use Value: Tight 17.1–18.9 V V_Z window eliminates need for external resistor divider calibration.

Voltage Reference for Op-Amp Circuits

Overvoltage Clamp in Power Supply Rails

Use Scenario: Precision 18 V reference for instrumentation amplifier biasing and ADC reference buffers.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable excitation voltage independent of supply ripple.

Use Value: 42 Ω Z_Z and 5% tolerance ensure <0.9 V total error budget over temperature and load in 12-bit measurement systems.

Use Scenario: Protection of 15 V logic rails against transient surges exceeding 20 V.

IC Role / Device Role / Timing Role: Passive clamp limiting rail voltage to 18.9 V max during ESD or load-dump events.

Use Value: 42 mA I_ZM and 500 mW P_D allow sustained clamping for >100 ms without thermal runaway.

Feedback Regulation in Switch-Mode PSUs

Threshold Detection in Analog Comparators

Use Scenario: Secondary-side voltage sensing in isolated flyback converters targeting 18 V output.

IC Role / Device Role / Timing Role: Zener-based reference feeding optocoupler LED to close regulation loop.

Use Value: Low 0.1 mA leakage preserves current transfer ratio stability across wide temperature range.

Use Scenario: Setting 18 V trip point for battery undervoltage lockout in portable equipment.

IC Role / Device Role / Timing Role: Fixed threshold element in comparator hysteresis network.

Use Value: Tight 17.1–18.9 V V_Z window eliminates need for external resistor divider calibration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N6006RLG	Same 18 V nominal rating, DO-35 package, but manufactured by ON Semiconductor; 5% tolerance, 42 Ω Z_Z, 0.1 mA I_R @ 14 V	No functional difference in voltage regulation or thermal performance; identical pinout and mounting	Select when sourcing from ON Semi authorized channels or requiring dual-sourcing flexibility
BZX55-C18	18 V Zener, 5% tolerance, DO-35, but rated for 500 mW only at T_A = 25°C; derates to 300 mW at 75°C vs. 500 mW at T_L = 75°C for 1N6006B_T50R	Lower thermal margin in high-ambient environments; requires larger series resistor to limit I_Z under worst-case heating	Prefer 1N6006B_T50R for designs operating near 75°C ambient or requiring full 500 mW capability

Compared with 1N6006RLG and BZX55-C18, the 1N6006B_T50R offers superior thermal derating behavior (500 mW maintained up to lead temperature 75°C), making it more suitable for compact power supplies where lead temperature rise exceeds ambient - a key differentiator in space-constrained industrial modules.

Availability

1N6006B_T50R is available at Aetrix Electronics and suitable for industrial power supplies, analog sensor interfaces, and overvoltage protection circuits requiring stable component supply with full traceability and lifecycle continuity.

Supply support for 1N6006B_T50R 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016; known for robust, industry-standard Zener and rectifier diodes.

The 1N6006B_T50R belongs to Fairchild's legacy 1N5985B–1N6025B Zener diode family, engineered for general-purpose voltage regulation and reference applications demanding tight tolerance, low leakage, and high-temperature reliability.

FAQ

What is the exact Zener voltage range for 1N6006B_T50R at 5 mA test current?

The 1N6006B_T50R has a guaranteed Zener voltage range of 17.1 V (minimum) to 18.9 V (maximum) when measured at 5 mA test current and lead temperature of 30°C ± 1°C, per Fairchild's Rev. C2 datasheet. This 5% tolerance window reflects the device's precision as a shunt reference, and the 18 V nominal value is the center point of that range. The 1N6006B_T50R maintains this specification across its qualified operating temperature range.

Does 1N6006B_T50R have a specified forward voltage?

Yes - the 1N6006B_T50R specifies a maximum forward voltage (V_F) of 1.2 V at 200 mA forward current, consistent with standard silicon PN-junction diode behavior. This parameter is relevant for reverse-polarity protection or series diode applications, though the 1N6006B_T50R is primarily used in reverse-biased Zener mode. The forward characteristic is documented in the same datasheet section covering all 1N5985B–1N6025B devices.

What is the maximum allowable Zener current for continuous operation of 1N6006B_T50R?

The maximum Zener current (I_ZM) for the 1N6006B_T50R is 42 mA under worst-case conditions, derived from its 500 mW power rating and minimum Zener voltage of 17.1 V (500 mW ÷ 17.1 V ≈ 29.2 mA), with additional margin applied per Fairchild's derating curve. The datasheet explicitly lists 42 mA as the I_ZM value for 1N6006B_T50R, confirming safe DC conduction capability within thermal limits.

How does the thermal derating of 1N6006B_T50R compare to standard DO-35 Zeners?

The 1N6006B_T50R is rated for 500 mW power dissipation at lead temperature (T_L) ≤ 75°C, with linear derating of 4.0 mW/°C above that point - a higher thermal threshold than many DO-35 Zeners rated at 500 mW only at T_A = 25°C. This means the 1N6006B_T50R sustains full power longer as board temperature rises, improving reliability in enclosed or high-ambient environments without requiring oversized series resistors.

Is the DO-35 package of 1N6006B_T50R hermetically sealed?

Yes - the DO-35 package used for the 1N6006B_T50R is a glass-encapsulated axial lead device with a hermetic seal, providing moisture resistance and long-term parameter stability essential for industrial and automotive applications. Fairchild's datasheet confirms the DO-35 construction for the entire 1N5985B–1N6025B series, and the glass body is visible in top-marking diagrams showing the cathode band and laser-etched markings.

1N6006B_T50R Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 18 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 42 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 14 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 200 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

1N6006B_T50R FAQ

1.How can I place an order for 1N6006B_T50R through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N6006B_T50R 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 1N6006B_T50R reliable?

The price and inventory of 1N6006B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6006B_T50R is usually 5 days.

3.What payment methods are accepted for 1N6006B_T50R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6006B_T50R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N6006B_T50R?

1N6006B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N6006B_T50R 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 1N6006B_T50R?

For technical support, including 1N6006B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6006B_T50R requirements.

6.How does Aetrix verify that 1N6006B_T50R is sourced from the original manufacturer or authorized distributors?

All 1N6006B_T50R 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 1N6006B_T50R meets industry standards.

7.What is the process for return or replacement of 1N6006B_T50R?

All 1N6006B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N6006B_T50R, 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 1N6006B_T50R part is unused and in its original packaging.

Return procedure for 1N6006B_T50R:

1.Submit a request within 90 days.

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

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