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

onsemi 1N759A_T50R

Name: 1N759A_T50R
Brand: onsemi
SKU: 1N759A_T50R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N759A_T50R

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N759A_T50R.pdf

Description:: DIODE ZENER 12V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:6,433

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Product details

Overview

1N759A_T50R from Fairchild Semiconductor is a 12 V, 5% tolerance, 500 mW glass-passivated Zener diode in DO-35 package, rated for 30 mA maximum Zener current at 25°C and 0.1 µA reverse leakage at 1 V, used for precision voltage regulation and reference in low-power analog circuits.

For engineers reviewing the 1N759A_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (11.4–12.6 V), thermal derating (4.0 mW/°C above 75°C), junction temperature range (–65 to +200°C), and DO-35 mechanical compatibility with through-hole PCB layouts.

Technical Context

This device operates as a two-terminal voltage reference diode, relying on controlled reverse-biased avalanche breakdown to maintain stable output voltage across varying load currents. Its 5% tolerance and tight V_Z distribution (min 11.4 V, typ 12 V, max 12.6 V at I_Z = 20 mA) support basic regulation in non-critical analog subsystems.

Thermal performance is defined by a 500 mW power dissipation limit at lead temperature ≤75°C, with linear derating to zero at 200°C junction temperature. Reverse leakage remains ≤0.1 µA at VR = 1 V, ensuring minimal quiescent current draw in battery-sensitive designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_Z @ I_Z = 20 mA	11.4 V min / 12 V typ / 12.6 V max - defines usable regulation window under standard test conditions
Tolerance	±5% - sets absolute voltage error bound for calibration and reference use
P_D @ T_L ≤ 75°C	500 mW - maximum steady-state power before thermal derating begins
Derating Slope	4.0 mW/°C above 75°C - determines safe operating power at elevated ambient temperatures
I_ZM	30 mA - peak DC Zener current sustainable without exceeding P_D limit at 25°C
I_R @ V_R = 1 V	≤0.1 µA - ensures negligible standby current in high-impedance bias networks
T_J/T_STG	–65°C to +200°C - supports operation in automotive under-hood and industrial environments

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener reference ground node	Connected to circuit common when used in shunt regulation configuration
Cathode	Reverse breakdown terminal / regulated output node	Provides stable voltage referenced to anode; marked with color band per JEDEC standard

Key Features

Feature	Design Value
Glass-passivated junction	Enhances long-term stability and moisture resistance vs. epoxy-packaged Zeners
DO-35 mechanical standardization	Enables drop-in replacement across legacy 1Nxxx Zener families and automated through-hole assembly
–65°C to +200°C operating range	Supports deployment in extreme-temperature industrial and automotive applications without derating penalties
5% voltage tolerance	Meets cost-sensitive analog reference requirements where ±5% regulation is acceptable

Applications

Power Supply Reference	Overvoltage Clamp
Use Scenario: Providing stable 12 V reference for linear regulator feedback or ADC reference divider networks. IC Role / Device Role / Timing Role: Shunt voltage reference diode establishing precise DC bias point. Use Value: Delivers 12 V ±0.6 V regulation with <0.1 µA leakage, minimizing loading on high-impedance dividers.	Use Scenario: Protecting downstream IC inputs from transient overvoltage events exceeding 12 V. IC Role / Device Role / Timing Role: Passive clamping element diverting excess current to ground during surges. Use Value: Activates at 11.4 V minimum to clamp before damage threshold of 13.2 V-rated logic inputs.
Sensor Bias Network	Current Source Stabilizer
Use Scenario: Supplying constant bias voltage to resistive temperature sensors or photodiodes. IC Role / Device Role / Timing Role: Voltage reference node stabilizing excitation potential across sensor elements. Use Value: Maintains ±5% bias accuracy across –40°C to +85°C ambient, critical for ratiometric measurements.	Use Scenario: Setting fixed current through a series resistor for LED or transducer drive. IC Role / Device Role / Timing Role: Voltage reference defining current magnitude via Ohm's Law (I = V_Z/R). Use Value: Enables 12 V-based current sources with <1% drift over temperature due to low Z_Z (17 Ω).

Power Supply Reference

Overvoltage Clamp

Use Scenario: Providing stable 12 V reference for linear regulator feedback or ADC reference divider networks.

IC Role / Device Role / Timing Role: Shunt voltage reference diode establishing precise DC bias point.

Use Value: Delivers 12 V ±0.6 V regulation with <0.1 µA leakage, minimizing loading on high-impedance dividers.

Use Scenario: Protecting downstream IC inputs from transient overvoltage events exceeding 12 V.

IC Role / Device Role / Timing Role: Passive clamping element diverting excess current to ground during surges.

Use Value: Activates at 11.4 V minimum to clamp before damage threshold of 13.2 V-rated logic inputs.

Sensor Bias Network

Current Source Stabilizer

Use Scenario: Supplying constant bias voltage to resistive temperature sensors or photodiodes.

IC Role / Device Role / Timing Role: Voltage reference node stabilizing excitation potential across sensor elements.

Use Value: Maintains ±5% bias accuracy across –40°C to +85°C ambient, critical for ratiometric measurements.

Use Scenario: Setting fixed current through a series resistor for LED or transducer drive.

IC Role / Device Role / Timing Role: Voltage reference defining current magnitude via Ohm's Law (I = V_Z/R).

Use Value: Enables 12 V-based current sources with <1% drift over temperature due to low Z_Z (17 Ω).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4742A	12 V nominal, 5% tolerance, 1 W power rating, DO-41 package	Higher power handling enables higher current clamping but requires larger PCB footprint	Select when >30 mA Zener current or >500 mW dissipation is required
BZX55-C12	12 V nominal, 5% tolerance, 500 mW, DO-35 package, tighter V_Z tempco	Improved temperature coefficient supports better stability over –25°C to +75°C	Select when improved thermal drift performance is prioritized over legacy 1Nxxx compatibility

Compared with 1N759A_T50R, 1N4742A offers higher power capacity in a larger package, while BZX55-C12 provides superior temperature stability in identical DO-35 form factor-choice depends on whether power headroom or thermal drift dominates design constraints.

Availability

1N759A_T50R is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and sensor biasing applications requiring stable component supply and long-lifecycle availability.

Supply support for 1N759A_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.

The 1N7xxA series belongs to Fairchild's legacy general-purpose Zener diode product line, designed for cost-effective voltage regulation and clamping in consumer, industrial, and computing power systems.

FAQ

What is the Zener voltage tolerance of the 1N759A_T50R?

The 1N759A_T50R has a guaranteed ±5% tolerance on its nominal 12 V Zener voltage, meaning the actual measured V_Z falls between 11.4 V and 12.6 V when tested at I_Z = 20 mA and T_A = 25°C. This tolerance is specified per JEDEC standard and applies to all units in the production lot, making the 1N759A_T50R suitable for applications where moderate voltage accuracy is acceptable.

Does the 1N759A_T50R have a specified Zener impedance?

Yes, the 1N759A_T50R has a typical Zener impedance (Z_Z) of 17 Ω measured at I_Z = 20 mA and T_A = 25°C. This value reflects the dynamic resistance in the breakdown region and directly impacts regulation accuracy under varying load conditions-the lower Z_Z, the less the output voltage shifts with current changes. The 1N759A_T50R's 17 Ω Z_Z supports stable performance in low-current reference applications.

What is the maximum power dissipation for the 1N759A_T50R?

The 1N759A_T50R is rated for 500 mW maximum 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 until reaching zero dissipation at 200°C junction temperature. This thermal profile must be accounted for in layout and heatsinking decisions-especially in enclosed or high-ambient environments where the 1N759A_T50R may operate near its thermal limits.

Is the 1N759A_T50R compatible with automated through-hole assembly?

Yes, the 1N759A_T50R uses the industry-standard DO-35 glass axial package with 0.022″ diameter leads spaced 0.250″ apart, fully compatible with standard wave soldering and axial insertion equipment. Its cathode band marking follows JEDEC conventions, enabling reliable orientation detection during automated placement. The 1N759A_T50R's mechanical dimensions and lead form meet IPC-7351 Class L requirements for through-hole discrete components.

What is the reverse leakage current specification for the 1N759A_T50R?

The 1N759A_T50R specifies a maximum reverse leakage current (I_R) of 0.1 µA when reverse-biased at V_R = 1 V and T_A = 25°C. This ultra-low leakage ensures minimal parasitic current draw in high-impedance reference networks and battery-powered circuits. At higher reverse voltages approaching V_Z, leakage increases predictably but remains within safe operational bounds defined by the device's power rating and thermal limits.

1N759A_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):: 12 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 30 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 200 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

1N759A_T50R FAQ

1.How can I place an order for 1N759A_T50R through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N759A_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 1N759A_T50R reliable?

The price and inventory of 1N759A_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N759A_T50R is usually 5 days.

3.What payment methods are accepted for 1N759A_T50R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N759A_T50R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N759A_T50R?

1N759A_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N759A_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 1N759A_T50R?

For technical support, including 1N759A_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N759A_T50R requirements.

6.How does Aetrix verify that 1N759A_T50R is sourced from the original manufacturer or authorized distributors?

All 1N759A_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 1N759A_T50R meets industry standards.

7.What is the process for return or replacement of 1N759A_T50R?

All 1N759A_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N759A_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 1N759A_T50R part is unused and in its original packaging.

Return procedure for 1N759A_T50R:

1.Submit a request within 90 days.

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

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