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

Microchip Technology 1N759A/TR

Name: 1N759A/TR
Brand: Microchip Technology
SKU: 1N759A/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N759A/TR

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

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

Datasheet:: 1N759A/TR.pdf

Description:: DIODE ZENER 12V 500MW DO204AH

Quantity:: RFQ Add To RFQ list

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Inventory:3,821

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Product details

Overview

1N759A/TR from Microsemi is a 500 mW, 12 V ±5% axial-leaded Zener diode in DO-35 (DO-204AH) glass package, qualified to JANTXV level per MIL-PRF-19500/127, with 10 Ω dynamic impedance at 9 mA, +0.080 %/°C temperature coefficient, and rated for -65°C to +175°C operation. It serves as a precision voltage reference and shunt regulator in military power supply feedback loops.

For engineers reviewing the 1N759A/TR datasheet, 1N759A/TR pinout, 1N759A/TR application, or 1N759A/TR equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (250 °C/W junction-to-lead), surge current capability, RoHS compliance status, and MIL-qualified reliability grading.

Technical Context

The 1N759A/TR operates as a silicon-based shunt voltage regulator, maintaining stable 12 V output across varying load currents and temperatures via controlled reverse-biased breakdown. Its metallurgically bonded junction ensures low leakage (<1 µA at 1 V reverse) and radiation hardness per MicroNote 050.

Designed for high-reliability environments, it supports operation up to +175°C junction temperature with linear derating from 500 mW at +50°C lead temperature, and exhibits minimal capacitance and ESD immunity per MIL-STD-750 Method 1020.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	12.0 V ±5% at I_ZT = 9 mA - defines nominal regulation point with guaranteed accuracy over temperature
Power Dissipation	500 mW @ T_L = +50°C - maximum continuous power before thermal derating begins
Dynamic Impedance Z_ZT	10 Ω @ I_ZT = 9 mA - low AC impedance ensures tight regulation under dynamic load changes
Temp Coefficient αV_Z	+0.080 %/°C @ +25°C - positive drift enables predictable compensation in wide-temperature designs
Reverse Leakage I_R	<1 µA @ V_R = 1 V - ensures minimal standby current in high-impedance bias networks
Junction Temp Range	-65°C to +175°C - supports operation in aerospace, downhole, and defense electronics
Thermal Resistance R_θJL	250 °C/W @ 0.375″ lead length - determines safe power handling with defined mechanical mounting

Pinout & Package

DO-35 (DO-204AH) hermetically sealed axial-glass package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference	Unbanded end; connects to lower-potential node in shunt regulator configuration
Cathode	Zener breakdown terminal / regulation reference	Banded end; connects to regulated voltage rail; reverse-biased during normal operation

Key Features

Feature	Design Value
MIL-PRF-19500/127 Qualification	JANTXV-level screening ensures proven reliability for flight-critical and defense systems
Metallurgical Bond Construction	Eliminates wire bonds to improve thermal stability and radiation tolerance per MicroNote 050
Low Capacitance	Enables use in high-frequency reference and noise-sensitive analog circuits without signal coupling
ESD Immunity	Non-sensitive per MIL-STD-750 Method 1020 - simplifies handling and board-level ESD protection design
Tape & Reel Packaging	"TR" suffix indicates EIA-296 compliant reel format for automated SMT-compatible axial placement

Applications

Avionics Power Monitoring	Military Radio Bias Supply
Use Scenario: Regulating reference voltage for ADCs monitoring 28 V aircraft bus voltage under extreme thermal cycling. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 12 V input to precision analog front-end circuitry. Use Value: JANTXV qualification and -65°C to +175°C operation ensure uninterrupted function during high-altitude cold soak and engine bay heat exposure.	Use Scenario: Setting bias point for RF power amplifier stages in handheld tactical radios exposed to shock/vibe and humidity. IC Role / Device Role / Timing Role: Zener clamp establishing fixed DC operating point for transistor gain control networks. Use Value: Hermetic DO-35 glass package and metallurgical bond prevent parameter shift in harsh environmental conditions.
Satellite Payload Voltage Reference	Downhole Logging Tool Regulation
Use Scenario: Providing stable 12 V reference for sensor signal conditioning in LEO satellite payloads subject to total ionizing dose. IC Role / Device Role / Timing Role: Radiation-hardened shunt regulator maintaining calibration integrity of telemetry subsystems. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating in TID environments up to 100 krad(Si).	Use Scenario: Regulating auxiliary supply rails in borehole pressure/temperature sensors operating at 175°C ambient. IC Role / Device Role / Timing Role: High-temperature-stable Zener element in isolated DC-DC feedback loop. Use Value: +0.080 %/°C tempco and 175°C max junction rating enable predictable regulation without external compensation.

Avionics Power Monitoring

Military Radio Bias Supply

Use Scenario: Regulating reference voltage for ADCs monitoring 28 V aircraft bus voltage under extreme thermal cycling.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 12 V input to precision analog front-end circuitry.

Use Value: JANTXV qualification and -65°C to +175°C operation ensure uninterrupted function during high-altitude cold soak and engine bay heat exposure.

Use Scenario: Setting bias point for RF power amplifier stages in handheld tactical radios exposed to shock/vibe and humidity.

IC Role / Device Role / Timing Role: Zener clamp establishing fixed DC operating point for transistor gain control networks.

Use Value: Hermetic DO-35 glass package and metallurgical bond prevent parameter shift in harsh environmental conditions.

Satellite Payload Voltage Reference

Downhole Logging Tool Regulation

Use Scenario: Providing stable 12 V reference for sensor signal conditioning in LEO satellite payloads subject to total ionizing dose.

IC Role / Device Role / Timing Role: Radiation-hardened shunt regulator maintaining calibration integrity of telemetry subsystems.

Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating in TID environments up to 100 krad(Si).

Use Scenario: Regulating auxiliary supply rails in borehole pressure/temperature sensors operating at 175°C ambient.

IC Role / Device Role / Timing Role: High-temperature-stable Zener element in isolated DC-DC feedback loop.

Use Value: +0.080 %/°C tempco and 175°C max junction rating enable predictable regulation without external compensation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N759A-1	No "TR" suffix; bulk packaging instead of tape-and-reel; identical electrical specs and qualification	Manual assembly or low-volume prototyping where reel feed is unnecessary	Select 1N759A/TR when automated placement or inventory traceability is required
1N759AUR-1	DO-213AA (MELF) surface-mount package; same 12 V ±5%, JANTXV-qualified, RoHS-compliant	Space-constrained PCBs requiring SMT compatibility and higher vibration resistance	Choose 1N759AUR-1 only if board layout mandates MELF footprint and reflow process compatibility

Compared with 1N759A/TR, the 1N759A-1 offers identical performance in bulk form but lacks reel logistics support, while 1N759AUR-1 shifts to MELF for SMT use-neither is pin-compatible due to differing packages, making 1N759A/TR the sole axial-leaded, tape-and-reel option in this voltage grade.

Availability

1N759A/TR is available at Aetrix Electronics and suitable for avionics power monitoring, military radio bias supply, satellite payload voltage reference, and downhole logging tool regulation requiring stable component supply across extended temperature and radiation environments.

Supply support for 1N759A/TR 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

Microsemi Corporation (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.

The 1N759A/TR belongs to Microsemi's legacy MIL-PRF-19500/127 qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems where long-term stability and environmental resilience are mandatory.

FAQ

What is the Zener voltage tolerance of the 1N759A/TR?

The 1N759A/TR has a nominal Zener voltage of 12.0 V with a ±5% tolerance, as indicated by the "A" suffix in its JEDEC nomenclature. This tolerance applies across the full operating temperature range of -65°C to +175°C and is verified per MIL-PRF-19500/127 test requirements. The 1N759A/TR maintains this specification under specified test conditions including I_ZT = 9 mA and 20-second stabilization time after current application.

Is the 1N759A/TR RoHS compliant?

The 1N759A/TR is not RoHS compliant, as the "TR" suffix denotes tape-and-reel packaging of the standard non-RoHS commercial-grade variant. RoHS-compliant versions are only available under the "e3" suffix (e.g., 1N759A-1e3) and are restricted to commercial-grade units-not JANTXV-qualified devices like the 1N759A/TR. Therefore, the 1N759A/TR retains traditional tin-lead plating per MIL-STD-750.

What does the "TR" suffix mean in 1N759A/TR?

The "TR" suffix in 1N759A/TR indicates EIA-296 standard tape-and-reel packaging, enabling automated axial-leaded component placement. It does not alter electrical or reliability specifications-the 1N759A/TR retains identical Zener voltage, dynamic impedance, JANTXV qualification, and DO-35 package dimensions as the bulk 1N759A-1. The "TR" designation solely reflects packaging format and logistics compatibility.

What is the maximum Zener current I_ZM for the 1N759A/TR?

The maximum Zener current I_ZM for the 1N759A/TR is 35 mA, derived from its 500 mW power rating and 12 V nominal Zener voltage (P = V × I). This value assumes operation at T_L = +50°C with 0.375″ lead length; above this temperature, power must be linearly derated to zero at +175°C, proportionally reducing allowable I_ZM.

How is polarity marked on the 1N759A/TR?

The 1N759A/TR uses a cathode band to indicate polarity: the banded end is the cathode and must be connected to the higher-potential node in shunt regulator configurations. During Zener operation, the device is reverse-biased, so the cathode connects to the regulated voltage rail and the anode (unbanded end) connects to ground or lower potential. This marking conforms to JEDEC DO-35 standards and is visible on the glass body.

1N759A/TR Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 12 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 30 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 9 V

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 200 mA

Operating Temperature:: -65°C ~ 175°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AH (DO-35)

1N759A/TR FAQ

1.How can I place an order for 1N759A/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N759A/TR 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/TR reliable?

The price and inventory of 1N759A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N759A/TR is usually 5 days.

3.What payment methods are accepted for 1N759A/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N759A/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N759A/TR?

1N759A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N759A/TR 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/TR?

For technical support, including 1N759A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N759A/TR requirements.

6.How does Aetrix verify that 1N759A/TR is sourced from the original manufacturer or authorized distributors?

All 1N759A/TR 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/TR meets industry standards.

7.What is the process for return or replacement of 1N759A/TR?

All 1N759A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N759A/TR, 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/TR part is unused and in its original packaging.

Return procedure for 1N759A/TR:

1.Submit a request within 90 days.

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

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