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

onsemi 1N6017B_T50A

Name: 1N6017B_T50A
Brand: onsemi
SKU: 1N6017B_T50A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N6017B_T50A

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N6017B_T50A.pdf

Description:: DIODE ZENER 51V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:5,227

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Product details

Overview

1N6017B_T50A from Fairchild Semiconductor is a 51 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 4.0 mW/°C derating, 2 mA test current, and 180 Ω typical zener impedance at IZ. It provides precise voltage regulation in low-power reference and protection circuits.

For engineers reviewing the 1N6017B_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include its 51 V nominal zener voltage, DO-35 mechanical compatibility, 2 mA test current requirement, 180 Ω dynamic impedance, and 0.1 mA leakage current at 39 V reverse bias.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across load variations and temperature shifts. Its 51 V nominal zener voltage is specified at 2 mA test current with ±5% tolerance, and it exhibits 180 Ω typical dynamic impedance (ZZ) at that condition.

The device supports operation from –65°C to +200°C junction/storage temperature range and delivers 180 mA maximum zener current (IZM) at 51 V, based on thermal limits and power derating above 75°C ambient lead temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	51 V nominal, ±5% tolerance - defines regulated output voltage under 2 mA test current
Power Dissipation (P_D)	500 mW at T_L ≤ 75°C - sets maximum continuous power handling before thermal derating applies
Zener Impedance (Z_Z)	180 Ω typical at I_Z = 2 mA - determines voltage regulation stability under small-signal AC load variation
Leakage Current (I_R)	0.1 mA max at V_R = 39 V - ensures minimal standby current in high-impedance bias networks
Max Zener Current (I_ZM)	180 mA - derived from P_D/V_Z, limiting peak surge capability without exceeding thermal limits
Operating Temperature	–65°C to +200°C - enables use in automotive under-hood, industrial, and aerospace environments

Pinout & Package

DO-35 glass axial package with cathode indicated by color band; two-terminal device with anode and cathode leads.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference	Connected to lower potential side in reverse-bias regulation configuration
Cathode	Zener breakdown terminal / voltage reference node	Connected to higher potential side; marked with color band; defines regulated output point

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables predictable regulation without post-production trimming in cost-sensitive references
DO-35 glass package	Provides hermetic sealing and thermal stability for long-term voltage reference integrity
180 Ω dynamic impedance at 2 mA	Minimizes output voltage deviation under small-signal load transients in feedback networks
0.1 mA leakage at 39 V	Reduces error contribution in high-impedance voltage divider biasing of op-amp references
–65°C to +200°C operating range	Supports deployment in extreme environments without derating penalties beyond datasheet limits

Applications

Voltage Reference for Op-Amp Circuits	Overvoltage Clamp in Signal Conditioning
Use Scenario: Stable DC reference generation for precision instrumentation amplifiers and ADC bias networks. IC Role / Device Role: Zener diode providing fixed 51 V reference node in high-impedance divider or shunt regulator topology. Use Value: ±5% tolerance and 180 Ω impedance ensure <1% reference drift under 100 µA load variation at room temperature.	Use Scenario: Protection of analog input stages against transient overvoltage events up to 60 V. IC Role / Device Role: Shunt clamping element diverting excess current when input exceeds 51 V breakdown threshold. Use Value: 180 mA I_ZM rating allows safe absorption of short-duration surges without thermal runaway.
Low-Power Power Supply Regulation	Temperature-Stable Bias Network
Use Scenario: Local regulation for microcontroller reset circuitry or EEPROM write-enable logic. IC Role / Device Role: Standalone shunt regulator maintaining 51 V rail for discrete logic-level translation. Use Value: 500 mW power rating supports continuous operation at 1 mA load with margin for ripple rejection.	Use Scenario: Biasing of transistor amplifier stages requiring stable quiescent current over wide temperature swings. IC Role / Device Role: Zener-based current source reference where 51 V sets emitter-base voltage differential. Use Value: –65°C to +200°C operating range ensures consistent bias point across automotive under-hood conditions.

Voltage Reference for Op-Amp Circuits

Overvoltage Clamp in Signal Conditioning

Use Scenario: Stable DC reference generation for precision instrumentation amplifiers and ADC bias networks.

IC Role / Device Role: Zener diode providing fixed 51 V reference node in high-impedance divider or shunt regulator topology.

Use Value: ±5% tolerance and 180 Ω impedance ensure <1% reference drift under 100 µA load variation at room temperature.

Use Scenario: Protection of analog input stages against transient overvoltage events up to 60 V.

IC Role / Device Role: Shunt clamping element diverting excess current when input exceeds 51 V breakdown threshold.

Use Value: 180 mA I_ZM rating allows safe absorption of short-duration surges without thermal runaway.

Low-Power Power Supply Regulation

Temperature-Stable Bias Network

Use Scenario: Local regulation for microcontroller reset circuitry or EEPROM write-enable logic.

IC Role / Device Role: Standalone shunt regulator maintaining 51 V rail for discrete logic-level translation.

Use Value: 500 mW power rating supports continuous operation at 1 mA load with margin for ripple rejection.

Use Scenario: Biasing of transistor amplifier stages requiring stable quiescent current over wide temperature swings.

IC Role / Device Role: Zener-based current source reference where 51 V sets emitter-base voltage differential.

Use Value: –65°C to +200°C operating range ensures consistent bias point across automotive under-hood conditions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N6017B (ON Semiconductor)	Identical 51 V ±5%, DO-35, 500 mW rating; same I_Z = 2 mA and ZZ = 180 Ω typical	No functional difference; validated drop-in replacement per ON Semi datasheet 1N6017B/D	Select when sourcing from ON Semiconductor authorized channels with identical traceability requirements
BZX55-C51 (Vishay)	51 V ±5%, DO-35, 500 mW, but specified at I_Z = 5 mA and ZZ = 200 Ω typical - higher test current increases thermal sensitivity	Less suitable for ultra-low-current bias networks due to higher minimum operating current requirement	Prefer for higher-current shunt regulation where 5 mA bias is acceptable and tighter lot-to-lot V_Z distribution is needed

Compared with 1N6017B_T50A, the ON Semiconductor 1N6017B offers identical electrical and mechanical specs for seamless substitution, while the Vishay BZX55-C51 requires 2.5× higher test current and shows higher dynamic impedance-making it less optimal for low-power reference designs but viable in higher-current clamp roles.

Availability

1N6017B_T50A is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and low-power regulation applications requiring stable component supply, long-term obsolescence management, and DO-35 package consistency.

Supply support for 1N6017B_T50A 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, signal conditioning, and discrete components before its acquisition by ON Semiconductor in 2016.

The 1N6017B_T50A belongs to Fairchild's legacy 1N5985B–1N6025B Zener diode family, engineered for general-purpose voltage regulation and transient suppression in industrial, automotive, and consumer electronics.

FAQ

What is the nominal zener voltage and tolerance of the 1N6017B_T50A?

The 1N6017B_T50A has a nominal zener voltage of 51 V with a ±5% tolerance, measured at a 2 mA test current and lead temperature of 30°C ± 1°C. This specification is confirmed in the Fairchild 1N5985B–1N6025B Rev. C2 datasheet, Table on page 2, row for 1N6017B. The 51 V value defines its primary function as a mid-range precision shunt reference.

What is the maximum power dissipation and thermal derating behavior of the 1N6017B_T50A?

The 1N6017B_T50A is rated for 500 mW power dissipation at lead temperature (T_L) ≤ 75°C, with linear derating of 4.0 mW/°C above that temperature. This derating curve ensures safe operation up to +200°C junction temperature, as defined in the Absolute Maximum Ratings table on page 1 of the Fairchild datasheet.

What is the zener impedance of the 1N6017B_T50A and how does it affect regulation performance?

The 1N6017B_T50A exhibits 180 Ω typical zener impedance (Z_Z) at I_Z = 2 mA, per the Electrical Characteristics table on page 2. This value directly impacts regulation accuracy: lower impedance yields smaller output voltage variation under changing load current, making the 1N6017B_T50A suitable for stable reference applications with modest current demands.

What is the leakage current specification for the 1N6017B_T50A and at what reverse voltage is it measured?

The 1N6017B_T50A specifies a maximum leakage current (I_R) of 0.1 mA at a reverse voltage (V_R) of 39 V, as stated in the Electrical Characteristics table on page 2. This low leakage ensures minimal error contribution in high-impedance bias networks and preserves efficiency in battery-powered systems.

Is the 1N6017B_T50A compatible with standard DO-35 footprint layouts and what marking identifies its cathode?

Yes, the 1N6017B_T50A uses the industry-standard DO-35 glass axial package with 0.375" (9.5 mm) lead length, fully compatible with standard DO-35 PCB footprints. Its cathode is identified by a distinct color band on the glass body, consistent with JEDEC DO-35 mechanical specifications and Fairchild's marking guidelines on page 3 of the datasheet.

1N6017B_T50A Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 51 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 180 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 39 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

1N6017B_T50A FAQ

1.How can I place an order for 1N6017B_T50A through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N6017B_T50A 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 1N6017B_T50A reliable?

The price and inventory of 1N6017B_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6017B_T50A is usually 5 days.

3.What payment methods are accepted for 1N6017B_T50A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6017B_T50A transactions.

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4.How is shipping managed for 1N6017B_T50A?

1N6017B_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N6017B_T50A 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 1N6017B_T50A?

For technical support, including 1N6017B_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6017B_T50A requirements.

6.How does Aetrix verify that 1N6017B_T50A is sourced from the original manufacturer or authorized distributors?

All 1N6017B_T50A 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 1N6017B_T50A meets industry standards.

7.What is the process for return or replacement of 1N6017B_T50A?

All 1N6017B_T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6017B_T50A, 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 1N6017B_T50A part is unused and in its original packaging.

Return procedure for 1N6017B_T50A:

1.Submit a request within 90 days.

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

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