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

onsemi 1N6010B

Name: 1N6010B
Brand: onsemi
SKU: 1N6010B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N6010B

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N6010B.pdf

Description:: DIODE ZENER 27V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:3,092

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Product details

Overview

1N6010B from Fairchild Semiconductor is a 27 V, 5% tolerance, 500 mW glass-passivated Zener diode in DO-35 package, designed for precision voltage regulation and reference applications in power supply feedback loops, overvoltage protection circuits, and analog signal conditioning stages.

For engineers reviewing the 1N6010B datasheet, pinout, applications, or equivalent options, key selection criteria include its 27 V nominal Zener voltage at 5 mA test current, 70 Ω dynamic impedance, 0.1 mA leakage at 21 V reverse bias, and thermal derating of 4.0 mW/°C above 75°C - all critical for stable low-power voltage reference design.

Technical Context

The 1N6010B operates as a two-terminal voltage reference device with sharp Zener breakdown at 27 V, specified under thermal equilibrium conditions (TL = 30°C ±1°C, 3/8″ lead length). Its DO-35 glass package ensures hermetic sealing and stable long-term voltage performance.

It exhibits a typical Zener impedance of 70 Ω at IZ = 5 mA and 1800 Ω at IZK = 250 μA, supporting both regulated output and low-current sensing roles. The 0.1 mA maximum leakage at VR = 21 V enables reliable clamping in standby and low-power modes.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	27 V nominal at 5 mA test current - defines precise regulation point for feedback or clamp circuits
Tolerance	±5% - ensures predictable voltage accuracy without trimming in cost-sensitive designs
Power Dissipation	500 mW @ TL ≤ 75°C - supports continuous operation in compact PCB layouts with minimal heatsinking
Zener Impedance (Z_Z)	70 Ω @ I_Z = 5 mA - determines regulation stiffness and AC ripple rejection capability
Leakage Current (I_R)	≤ 0.1 mA @ V_R = 21 V - guarantees low standby power loss in battery-backed or energy-efficient systems
Max Zener Current (I_ZM)	70 mA - sets safe DC current limit before thermal runaway under worst-case voltage and temperature
Operating Temp Range	–65°C to +200°C - enables deployment in automotive under-hood, industrial motor control, and aerospace environments

Pinout & Package

DO-35 glass axial package with cathode indicated by color band; two-terminal device requiring no external biasing or control signals.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground	Connected to circuit ground or lower-potential node; establishes reference polarity for regulation
Cathode	Zener breakdown terminal / voltage regulation output	Connected to regulated node or error amplifier input; supplies stable 27 V reference when reverse-biased

Key Features

Feature	Design Value
Hermetic DO-35 glass package	Ensures long-term parameter stability and moisture resistance in harsh environments
5% Zener voltage tolerance	Eliminates need for post-assembly calibration in mid-precision voltage reference applications
Low 0.1 mA leakage at 21 V	Minimizes quiescent current draw in always-on protection circuits and battery-powered systems
70 Ω dynamic impedance at 5 mA	Provides tight load regulation (<0.2% ΔV per 10 mA load change) in feedback networks
–65°C to +200°C operating range	Supports direct mounting on high-temperature substrates without derating penalties

Applications

Switch-Mode Power Supply Feedback	Overvoltage Clamp Protection
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise 27 V threshold for TL431-like shunt regulator operation. Use Value: Enables ±1.5% output regulation accuracy across line/load/temperature without trimming resistors.	Use Scenario: Protecting microcontroller I/O pins against transient surges exceeding 24 V in industrial PLC inputs. IC Role / Device Role / Timing Role: Fast-acting voltage clamp limiting input voltage to 27 V during ESD or inductive kick events. Use Value: Prevents latch-up and gate oxide damage with <100 ns response and sub-100 Ω clamping impedance.
Analog Signal Level Shifting	Reference Voltage Generator
Use Scenario: Biasing op-amp inputs to establish 27 V common-mode level in high-side current sensing circuits. IC Role / Device Role / Timing Role: Precision DC bias source providing stable offset independent of supply rail fluctuations. Use Value: Maintains sensor measurement accuracy within ±0.5% over –40°C to +125°C ambient range.	Use Scenario: Generating fixed 27 V reference for ADC voltage scaling in data acquisition modules. IC Role / Device Role / Timing Role: Low-drift voltage reference supplying excitation to precision resistor dividers. Use Value: Delivers <50 ppm/°C effective tempco when used with 1% metal-film divider network.

Switch-Mode Power Supply Feedback

Overvoltage Clamp Protection

Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop.

IC Role / Device Role / Timing Role: Zener reference element setting precise 27 V threshold for TL431-like shunt regulator operation.

Use Value: Enables ±1.5% output regulation accuracy across line/load/temperature without trimming resistors.

Use Scenario: Protecting microcontroller I/O pins against transient surges exceeding 24 V in industrial PLC inputs.

IC Role / Device Role / Timing Role: Fast-acting voltage clamp limiting input voltage to 27 V during ESD or inductive kick events.

Use Value: Prevents latch-up and gate oxide damage with <100 ns response and sub-100 Ω clamping impedance.

Analog Signal Level Shifting

Reference Voltage Generator

Use Scenario: Biasing op-amp inputs to establish 27 V common-mode level in high-side current sensing circuits.

IC Role / Device Role / Timing Role: Precision DC bias source providing stable offset independent of supply rail fluctuations.

Use Value: Maintains sensor measurement accuracy within ±0.5% over –40°C to +125°C ambient range.

Use Scenario: Generating fixed 27 V reference for ADC voltage scaling in data acquisition modules.

IC Role / Device Role / Timing Role: Low-drift voltage reference supplying excitation to precision resistor dividers.

Use Value: Delivers <50 ppm/°C effective tempco when used with 1% metal-film divider network.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5254B (ON Semiconductor)	27 V, ±5%, 500 mW, DO-35 - identical V_Z, same power rating, but higher Z_Z (100 Ω vs. 70 Ω)	Slightly reduced regulation stiffness; may require larger bypass cap for same ripple rejection	Acceptable where tighter impedance is not required and ON Semi sourcing is preferred
BZX55-C27 (Vishay)	27 V, ±5%, 500 mW, DO-35 - same V_Z and tolerance, but 100 Ω Z_Z and 0.5 mA max I_R at 21 V	Higher leakage limits use in ultra-low-power sleep modes; less suitable for battery backup	Valid alternative if leakage spec is relaxed and Vishay supply chain alignment is prioritized

Compared with 1N6010B, the 1N5254B offers identical voltage and power but trades 30% higher dynamic impedance, while BZX55-C27 introduces 5× higher leakage - making 1N6010B preferable for precision, low-leakage, and thermally demanding applications.

Availability

1N6010B is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and analog signal conditioning requiring stable component supply, consistent parametric performance, and long-lifecycle availability.

Supply support for 1N6010B 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; its legacy Zener diodes remain widely deployed in industrial and automotive systems.

The 1N6010B belongs to Fairchild's 1N5985B–1N6025B Zener diode family, engineered for high-reliability voltage reference and clamping in power conversion, protection, and instrumentation applications.

FAQ

What is the nominal Zener voltage and test condition for the 1N6010B?

The 1N6010B has a nominal Zener voltage of 27 V, measured at a test current (I_Z) of 5 mA under thermal equilibrium conditions (lead temperature = 30°C ±1°C, 3/8″ lead length). Its minimum and maximum V_Z values are 25.65 V and 28.35 V respectively, reflecting its ±5% tolerance. This specification is confirmed in the official Fairchild 1N5985B–1N6025B datasheet Rev. C2.

What is the maximum power dissipation and thermal derating behavior of the 1N6010B?

The 1N6010B is rated for 500 mW power dissipation at lead temperature (T_L) ≤ 75°C with 3/8″ lead length. Above 75°C, it derates linearly at 4.0 mW/°C. At T_L = 125°C, its usable power drops to 300 mW. This derating curve ensures safe operation in enclosed or high-ambient-temperature environments without forced cooling.

What is the Zener impedance of the 1N6010B and why does it matter?

The 1N6010B exhibits a typical Zener impedance (Z_Z) of 70 Ω at I_Z = 5 mA and 1800 Ω at I_ZK = 250 μA. Low Z_Z directly improves regulation accuracy under varying load currents - for example, a 10 mA load shift causes only ~0.7 V deviation, enabling tighter feedback control in power supplies using the 1N6010B.

How is the cathode identified on the 1N6010B DO-35 package?

The cathode of the 1N6010B is marked by a distinct color band on the DO-35 glass axial package, consistent with industry-standard polarity marking. The band is located near one end of the cylindrical body and must be oriented toward the higher-potential node when used in reverse-bias regulation or clamping configurations.

What is the leakage current specification for the 1N6010B and at what reverse voltage is it measured?

The 1N6010B specifies a maximum leakage current (I_R) of 0.1 mA at a reverse voltage (V_R) of 21 V. This low leakage supports energy-efficient operation in always-on protection circuits and extends battery life in portable equipment where the 1N6010B serves as a standby voltage clamp or reference.

1N6010B Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 27 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 70 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 21 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

1N6010B FAQ

1.How can I place an order for 1N6010B through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N6010B 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 1N6010B reliable?

The price and inventory of 1N6010B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6010B is usually 5 days.

3.What payment methods are accepted for 1N6010B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6010B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N6010B?

1N6010B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N6010B 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 1N6010B?

For technical support, including 1N6010B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6010B requirements.

6.How does Aetrix verify that 1N6010B is sourced from the original manufacturer or authorized distributors?

All 1N6010B 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 1N6010B meets industry standards.

7.What is the process for return or replacement of 1N6010B?

All 1N6010B units undergo pre-shipment inspection (PSI). If there is an issue with 1N6010B, 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 1N6010B part is unused and in its original packaging.

Return procedure for 1N6010B:

1.Submit a request within 90 days.

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

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