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

Microchip Technology 1N754D

Name: 1N754D
Brand: Microchip Technology
SKU: 1N754D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N754D

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

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

Datasheet:: 1N754D.pdf

Description:: DIODE ZENER 6.8V 500MW DO204AH

Quantity:: RFQ Add To RFQ list

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Inventory:5,482

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Product details

Overview

1N754D from Microsemi is a 500 mW, 6.8 V ±1% tolerance silicon Zener diode in DO-35 (DO-204AH) glass axial-leaded package, qualified to JANTXV level per MIL-PRF-19500/127, with dynamic impedance of 3 Ω at 40 mA and temperature coefficient of +0.050 %/°C - used for precision voltage regulation in military power supply reference circuits.

For engineers reviewing the 1N754D datasheet, 1N754D pinout, 1N754D application, or 1N754D equivalent, key selection criteria include its tight 1% Zener voltage tolerance, hermetically sealed DO-35 package, JANTXV qualification, low dynamic impedance, and radiation-hardened construction suitable for high-reliability aerospace and defense systems.

Technical Context

The 1N754D operates as a reverse-biased voltage reference diode with nominal Zener voltage of 6.8 V at I_ZT = 40 mA. Its internal metallurgical bond ensures stable breakdown characteristics across -65°C to +175°C operating range and enables compliance with MIL-STD-750 ESD testing (Method 1020).

It exhibits a positive temperature coefficient (+0.050 %/°C), indicating increasing V_Z with rising junction temperature - critical for thermal drift compensation in regulated power supplies. Maximum Zener current I_ZM is 60 mA at 55°C ambient on PCB, derating linearly to zero at 175°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	6.8 V at 40 mA test current - defines precise regulation point for reference design
Zener Tolerance	±1% - enables high-accuracy voltage references without post-calibration
Dynamic Impedance	3 Ω at 40 mA - ensures minimal output voltage variation under load transients
Power Dissipation	500 mW at 50°C lead temperature - supports robust thermal margin in conduction-cooled designs
Temperature Coefficient	+0.050 %/°C - quantifies predictable V_Z drift for thermal compensation modeling
Reverse Leakage	≤2 µA at 5.0 V - guarantees low quiescent current in standby bias networks
Max Surge Current	Not specified in source - requires external limiting for transient protection

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground	Connected to circuit ground or lower-potential node during Zener operation
Cathode	Zener regulation terminal / reverse-bias input	Banded end; connected to unregulated input to maintain 6.8 V drop across load

Key Features

Feature	Design Value
JANTXV qualification	Meets MIL-PRF-19500/127 screening for extended temperature, shock, vibration, and life testing
Metallurgical bond construction	Eliminates interfacial delamination risk under thermal cycling and mechanical stress
Radiation hardness	Inherently resistant to total ionizing dose (TID) per MicroNote 050 - suitable for space-grade applications
Low capacitance	Minimizes high-frequency coupling in RF bias and timing circuits
ESD immunity	Non-sensitive per MIL-STD-750 Method 1020 - survives handling without protection circuitry

Applications

Avionics Power Reference	Military Radar Bias Supply
Use Scenario: Stable 6.8 V reference for analog-to-digital converter (ADC) reference buffers in airborne flight control computers. IC Role / Device Role / Timing Role: Zener voltage reference providing precision DC offset and scaling for sensor signal conditioning. Use Value: ±1% tolerance and +0.050 %/°C TC enable <1 LSB error over -55°C to +125°C operational range.	Use Scenario: Regulation of local oscillator (LO) bias voltage in X-band pulse-Doppler radar receiver front-ends. IC Role / Device Role / Timing Role: Low-noise, low-capacitance Zener shunt regulator stabilizing GaAs FET gate bias. Use Value: 3 Ω dynamic impedance maintains <5 mV ripple under 20 mA modulation current, preserving LO spectral purity.
Tactical Radio Voltage Clamp	Satellite Payload Power Monitor
Use Scenario: Overvoltage clamp protecting microcontroller I/O pins from 12 V rail transients in handheld HF radios. IC Role / Device Role / Timing Role: Transient-suppressing Zener shunt limiting voltage excursion to 6.8 V + V_F. Use Value: Hermetic DO-35 package withstands humidity and salt fog per MIL-STD-810G, ensuring field reliability.	Use Scenario: Primary voltage reference for radiation-tolerant telemetry ADC in LEO satellite power management units. IC Role / Device Role / Timing Role: Radiation-hardened Zener establishing calibration baseline for battery voltage monitoring. Use Value: Inherent TID hardness eliminates need for shielding or redundancy, reducing SWaP-C.

Avionics Power Reference

Military Radar Bias Supply

Use Scenario: Stable 6.8 V reference for analog-to-digital converter (ADC) reference buffers in airborne flight control computers.

IC Role / Device Role / Timing Role: Zener voltage reference providing precision DC offset and scaling for sensor signal conditioning.

Use Value: ±1% tolerance and +0.050 %/°C TC enable <1 LSB error over -55°C to +125°C operational range.

Use Scenario: Regulation of local oscillator (LO) bias voltage in X-band pulse-Doppler radar receiver front-ends.

IC Role / Device Role / Timing Role: Low-noise, low-capacitance Zener shunt regulator stabilizing GaAs FET gate bias.

Use Value: 3 Ω dynamic impedance maintains <5 mV ripple under 20 mA modulation current, preserving LO spectral purity.

Tactical Radio Voltage Clamp

Satellite Payload Power Monitor

Use Scenario: Overvoltage clamp protecting microcontroller I/O pins from 12 V rail transients in handheld HF radios.

IC Role / Device Role / Timing Role: Transient-suppressing Zener shunt limiting voltage excursion to 6.8 V + V_F.

Use Value: Hermetic DO-35 package withstands humidity and salt fog per MIL-STD-810G, ensuring field reliability.

Use Scenario: Primary voltage reference for radiation-tolerant telemetry ADC in LEO satellite power management units.

IC Role / Device Role / Timing Role: Radiation-hardened Zener establishing calibration baseline for battery voltage monitoring.

Use Value: Inherent TID hardness eliminates need for shielding or redundancy, reducing SWaP-C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N754A	±5% Zener tolerance vs. 1N754D's ±1%; same DO-35 package and JANTXV qualification	Lower accuracy reference; acceptable where calibration or trimming is available	Select 1N754A only when cost sensitivity outweighs precision requirement
SMZ6.8A	Surface-mount SOD-123 package; ±5% tolerance; commercial grade only; no MIL qualification	Not suitable for military/aerospace use; limited thermal performance (R_θJA ≈ 400 °C/W)	Choose SMZ6.8A only for non-critical commercial PCB space-constrained designs

Compared with 1N754A and SMZ6.8A, the 1N754D delivers superior accuracy and environmental ruggedness - its ±1% tolerance and JANTXV screening make it irreplaceable in uncalibrated, mission-critical voltage references where long-term stability and radiation resilience are mandatory.

Availability

1N754D is available at Aetrix Electronics and suitable for avionics power reference, military radar bias supply, and satellite payload power monitor applications requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for 1N754D 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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade components.

The 1N754D belongs to Microsemi's legacy MIL-PRF-19500/127 qualified Zener diode family, designed specifically for precision voltage regulation in defense, space, and critical infrastructure systems where failure is not an option.

FAQ

What is the Zener voltage tolerance of the 1N754D?

The 1N754D has a Zener voltage tolerance of ±1%, as indicated by the "D" suffix in its part number per Microsemi's nomenclature. This tight tolerance ensures the actual breakdown voltage remains within 6.732 V to 6.868 V at 40 mA test current and 25°C, making it suitable for high-accuracy reference applications without trimming.

Is the 1N754D qualified to military standards?

Yes, the 1N754D is qualified to JANTXV level per MIL-PRF-19500/127, including rigorous screening for temperature cycling, mechanical shock, vibration, and long-term life testing. Its hermetic DO-35 package and metallurgical bond construction meet the environmental and reliability requirements for deployed military and aerospace systems.

What is the maximum power dissipation for the 1N754D?

The 1N754D has an average rated power dissipation of 500 mW at a lead temperature (T_L) of +50°C with 0.375 inch lead length. On a PCB, it is rated for 400 mW at +55°C ambient, derating linearly to zero at +175°C - consistent with its R_θJA of 300 °C/W and R_θJL of 250 °C/W thermal resistances.

Does the 1N754D have radiation hardness?

Yes, the 1N754D is inherently radiation-hardened as described in Microsemi MicroNote 050. Its silicon structure and hermetic packaging provide resistance to total ionizing dose (TID), making it suitable for satellite and high-altitude avionics applications where exposure to cosmic radiation is expected.

How is polarity marked on the 1N754D?

The 1N754D uses a cathode band marking on the glass DO-35 body to indicate polarity. During Zener operation, the banded end (cathode) must be held at a higher potential than the anode (unbanded end) to achieve reverse-bias breakdown and 6.8 V regulation - correct orientation is essential for functional voltage reference behavior.

1N754D Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

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

Packaging:: Bulk

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 6.8 V

Tolerance:: ±1%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 5 Ohms

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

1N754D FAQ

1.How can I place an order for 1N754D through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N754D 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 1N754D reliable?

The price and inventory of 1N754D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N754D is usually 5 days.

3.What payment methods are accepted for 1N754D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N754D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N754D?

1N754D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N754D 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 1N754D?

For technical support, including 1N754D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N754D requirements.

6.How does Aetrix verify that 1N754D is sourced from the original manufacturer or authorized distributors?

All 1N754D 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 1N754D meets industry standards.

7.What is the process for return or replacement of 1N754D?

All 1N754D units undergo pre-shipment inspection (PSI). If there is an issue with 1N754D, 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 1N754D part is unused and in its original packaging.

Return procedure for 1N754D:

1.Submit a request within 90 days.

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

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