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

onsemi 1N962B_T50A

Name: 1N962B_T50A
Brand: onsemi
SKU: 1N962B_T50A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N962B_T50A

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N962B_T50A.pdf

Description:: DIODE ZENER 11V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:3,291

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Product details

Overview

1N962B_T50A from Fairchild Semiconductor is a 5% tolerance, 11 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, and operates from –65°C to +200°C. It delivers stable voltage reference in low-power regulator and overvoltage clamp circuits.

For engineers reviewing the 1N962B_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage (10.45–11.55 V), dynamic impedance (11.5 Ω @ 11.5 mA), leakage current (≤0.25 μA @ 8.4 V), maximum zener current (5 mA), and thermal stability across industrial temperature range.

Technical Context

The 1N962B_T50A functions as a precision voltage reference device using silicon PN junction avalanche breakdown. Its zener voltage is specified at 11.5 mA test current, with dynamic impedance measured at 0.1×IZ(dc) AC signal (60 Hz), and knee impedance defined at IZK = 0.25 mA.

It complies with JEDEC DO-35 mechanical standards, features cathode identification via color band, and is designed for through-hole mounting with 3/8″ lead length for thermal rating compliance. The device exhibits 5% total tolerance and supports stable regulation under low-current bias conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	10.45–11.55 V at I_Z = 11.5 mA - defines regulated output voltage window under nominal bias
Zener Impedance (Z_Z)	11.5 Ω @ I_Z = 11.5 mA - determines output voltage variation under load current changes
Max Power Dissipation (P_D)	500 mW @ T_L ≤ 75°C - sets maximum continuous DC power handling at lead temperature
Leakage Current (I_R)	≤0.25 μA @ V_R = 8.4 V - ensures minimal error current in high-impedance reference nodes
Operating Temp Range	–65°C to +200°C - enables use in extended industrial, automotive under-hood, and aerospace environments
Tolerance	±5% - specifies initial calibration accuracy without post-selection or trimming
Knee Impedance (Z_ZK)	700 Ω @ I_ZK = 0.25 mA - characterizes low-current regulation performance near turn-on threshold

Pinout & Package

DO-35 glass axial package with cathode identified by color band; leads are unmarked anode/cathode terminals suitable for through-hole PCB assembly.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward-biased terminal	Connected to lower potential side in reverse-bias regulation configuration
Cathode	Zener breakdown terminal	Marked with color band; connected to higher potential side to enable controlled avalanche conduction

Key Features

Feature	Design Value
Stable Zener Voltage Reference	11 V nominal with ±5% tolerance ensures predictable clamping and regulation in feedback loops
Low Dynamic Impedance	11.5 Ω at 11.5 mA minimizes output voltage shift under varying load currents
High-Temperature Operation	Rated up to +200°C junction/storage temperature supports under-hood and downhole applications
Low Leakage Current	≤0.25 μA at 8.4 V reduces error contribution in high-impedance voltage divider networks
Standard DO-35 Packaging	Industry-standard axial glass case enables drop-in replacement and compatibility with legacy assembly processes

Applications

Power Supply Voltage Reference	Overvoltage Protection Clamp
Use Scenario: Used in linear regulator feedback networks to set precise output voltage. IC Role / Device Role / Timing Role: Zener diode provides stable reference voltage to error amplifier input. Use Value: Enables ±1% output regulation accuracy with minimal external components in discrete LDO designs.	Use Scenario: Placed across sensitive IC supply rails to limit transient overvoltage events. IC Role / Device Role / Timing Role: Acts as shunt clamp to divert surge current above 11.5 V threshold. Use Value: Limits rail voltage to ≤11.55 V during ESD or load-dump transients, protecting downstream logic.
Temperature-Stable Sensor Biasing	Calibration Reference in Test Equipment
Use Scenario: Supplies bias current to silicon temperature sensors requiring stable excitation. IC Role / Device Role / Timing Role: Provides constant-voltage excitation source independent of supply fluctuations. Use Value: Maintains sensor linearity over –40°C to +125°C ambient due to low TC and wide operating range.	Use Scenario: Embedded in multimeter and oscilloscope internal reference chains. IC Role / Device Role / Timing Role: Serves as primary DC voltage standard for analog-to-digital converter calibration. Use Value: Delivers repeatable 11 V reference with <10 ppm/°C drift in bench-grade instrumentation.

Power Supply Voltage Reference

Overvoltage Protection Clamp

Use Scenario: Used in linear regulator feedback networks to set precise output voltage.

IC Role / Device Role / Timing Role: Zener diode provides stable reference voltage to error amplifier input.

Use Value: Enables ±1% output regulation accuracy with minimal external components in discrete LDO designs.

Use Scenario: Placed across sensitive IC supply rails to limit transient overvoltage events.

IC Role / Device Role / Timing Role: Acts as shunt clamp to divert surge current above 11.5 V threshold.

Use Value: Limits rail voltage to ≤11.55 V during ESD or load-dump transients, protecting downstream logic.

Temperature-Stable Sensor Biasing

Calibration Reference in Test Equipment

Use Scenario: Supplies bias current to silicon temperature sensors requiring stable excitation.

IC Role / Device Role / Timing Role: Provides constant-voltage excitation source independent of supply fluctuations.

Use Value: Maintains sensor linearity over –40°C to +125°C ambient due to low TC and wide operating range.

Use Scenario: Embedded in multimeter and oscilloscope internal reference chains.

IC Role / Device Role / Timing Role: Serves as primary DC voltage standard for analog-to-digital converter calibration.

Use Value: Delivers repeatable 11 V reference with <10 ppm/°C drift in bench-grade instrumentation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4740A	10 V nominal, 5% tolerance, DO-41 package, 1 Ω lower Z_Z, 1 W P_D	Higher power handling but larger footprint; less suitable for space-constrained DO-35 layouts	Select when higher power margin or lower impedance is required and board area permits DO-41
BZX55C11	11 V nominal, 5% tolerance, DO-35 package, 20 Ω Z_Z @ 5 mA, 500 mW rating	Higher dynamic impedance and different test current; tighter thermal resistance spec	Prefer when sourcing from European distributors or aligning with Vishay's BZX55 family for BOM consolidation

Compared with 1N962B_T50A, the 1N4740A offers greater power headroom but requires layout revision, while the BZX55C11 matches the DO-35 form factor yet trades off regulation stiffness for broader vendor availability and alternate qualification.

Availability

1N962B_T50A is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and sensor biasing applications requiring stable component supply and long-term obsolescence management.

Supply support for 1N962B_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, analog, and discrete devices before its acquisition by ON Semiconductor in 2016.

The 1N957B–1N979B series was developed for general-purpose, high-reliability Zener regulation in industrial and automotive systems where stable voltage references and robust thermal performance are essential.

FAQ

What is the nominal zener voltage of the 1N962B_T50A?

The 1N962B_T50A has a nominal zener voltage of 11 V, with a guaranteed range of 10.45 V to 11.55 V at 11.5 mA test current and 25°C ambient. This value is measured under thermal equilibrium at lead temperature of 30°C ± 1°C with 3/8″ lead length, per Fairchild specification Rev. F1. The 1N962B_T50A maintains this voltage window across its full operating temperature range.

Does the 1N962B_T50A have a cathode marking?

Yes, the 1N962B_T50A uses a color band on the DO-35 glass body to denote the cathode terminal, consistent with JEDEC standard marking practice. The anode is the unmarked end. This marking is visible and durable under standard visual inspection and automated optical recognition systems used in assembly. The 1N962B_T50A's cathode identification ensures correct polarity during manual or automated placement.

What is the maximum zener current rating for the 1N962B_T50A?

The 1N962B_T50A has a maximum zener current (I_ZM) of 5 mA, derived from its 500 mW power rating and nominal 11 V zener voltage. This rating applies under worst-case thermal conditions and accounts for power derating above 75°C. Exceeding 5 mA risks exceeding P_D limits and accelerating parametric drift. The 1N962B_T50A must be operated within this current limit to ensure long-term reliability.

Can the 1N962B_T50A be used in surface-mount designs?

No, the 1N962B_T50A is packaged in a DO-35 axial glass case intended for through-hole mounting only. It lacks solder pads, land patterns, or thermal pad structures required for reflow-compatible SMT assembly. Attempting to mount the 1N962B_T50A on SMT boards risks mechanical stress fracture and thermal mismatch failure. For surface-mount equivalents, consider SOD-123 or SOD-323 packaged Zeners with matching electrical specs.

What is the zener impedance of the 1N962B_T50A at its rated test current?

The 1N962B_T50A exhibits a zener impedance (Z_Z) of 11.5 Ω when measured at its rated test current of 11.5 mA and 60 Hz AC signal amplitude equal to 10% of DC bias. This value reflects small-signal AC resistance and directly impacts regulation accuracy under dynamic load conditions. Lower Z_Z indicates better voltage stability - the 1N962B_T50A's 11.5 Ω supports tight-tolerance reference applications.

1N962B_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):: 11 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 9.5 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 8.4 V

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

1N962B_T50A FAQ

1.How can I place an order for 1N962B_T50A through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N962B_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 1N962B_T50A reliable?

The price and inventory of 1N962B_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N962B_T50A is usually 5 days.

3.What payment methods are accepted for 1N962B_T50A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N962B_T50A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N962B_T50A?

1N962B_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N962B_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 1N962B_T50A?

For technical support, including 1N962B_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N962B_T50A requirements.

6.How does Aetrix verify that 1N962B_T50A is sourced from the original manufacturer or authorized distributors?

All 1N962B_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 1N962B_T50A meets industry standards.

7.What is the process for return or replacement of 1N962B_T50A?

All 1N962B_T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N962B_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 1N962B_T50A part is unused and in its original packaging.

Return procedure for 1N962B_T50A:

1.Submit a request within 90 days.

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

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