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

Microchip Technology 1N969A

Name: 1N969A
Brand: Microchip Technology
SKU: 1N969A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N969A

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: DO-204AA, DO-7, Axial

Datasheet:: 1N969A.pdf

Description:: DIODE ZENER 22V 500MW DO7

Quantity:: RFQ Add To RFQ list

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Inventory:6,329

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Product details

Overview

1N969A from Microsemi is a silicon 500 mW axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 22 V nominal Zener voltage with ±10% tolerance, 5.6 mA Zener test current, and 750 Ω maximum Zener impedance at I_ZT. It operates across –65°C to +175°C and is used for precision voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the 1N969A datasheet, 1N969A pinout, 1N969A application, or 1N969A equivalent, key selection criteria include its 22 V regulation point, ±10% tolerance (A suffix), 500 mW power rating at 50°C lead temperature, DO-35 mechanical compatibility, and cathode-band polarity marking for unidirectional clamping.

Technical Context

This discrete Zener diode functions as a passive voltage regulator by maintaining a stable reverse-biased breakdown voltage across its terminals under controlled current conditions. Its 22 V nominal Zener voltage exhibits a +0.087 %/°C temperature coefficient and 750 Ω dynamic impedance at 5.6 mA test current.

The device is constructed in a hermetically sealed glass DO-35 package with tin-lead or RoHS-compliant matte-tin plating, rated for 0.5 W steady-state dissipation at TL < 50°C (3/8″ from body), and supports surge currents up to 90 mA for 1/120 sec pulses.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	22 V - defines regulated output voltage under 5.6 mA test current
Zener Tolerance	±10% - specified by "A" suffix; allows 19.8 V to 24.2 V variation at 25°C
Zener Test Current	5.6 mA - required bias current to achieve nominal 22 V regulation
Max Zener Impedance	750 Ω at I_ZT - limits regulation accuracy under varying load current
Steady-State Power	500 mW at TL < 50°C - sets maximum continuous dissipation with 3/8″ lead length
Operating Temperature	–65°C to +175°C - enables use in extended industrial and aerospace environments
Reverse Leakage	5 μA at 16.7 V - ensures low standby current in high-impedance bias networks

Pinout & Package

Package: DO-35 (DO-204AH), hermetically sealed axial-lead glass case with cathode indicated by colored band. Terminals are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Non-banded end	Connected to lower-potential node; forward voltage ≤1.3 V @ 200 mA
Cathode	Banded end	Connected to higher-potential node during Zener operation; defines regulation polarity

Key Features

Feature	Design Value
JEDEC-registered Zener series	Complies with industry-standard 1N957B–1N992B family specifications and testing protocols
±10% voltage tolerance (A suffix)	Cost-optimized regulation accuracy suitable for non-critical reference and clamp applications
Low ESD sensitivity	Meets MIL-STD-750 Method 1020 - no special handling required in standard assembly
Hermetic glass DO-35 package	Ensures long-term stability and reliability in harsh thermal and humidity environments
Minimal junction capacitance	Typical C_J < 2 pF at 0 V - preserves high-frequency signal integrity in RF bias networks

Applications

Power Supply Regulation	Overvoltage Protection
Use Scenario: Stabilizing bias voltage for op-amp input stages in industrial sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Provides fixed 22 V reference to set common-mode level and improve PSRR. Use Value: Maintains regulation within ±10% across –40°C to +85°C ambient, enabling consistent ADC offset calibration.	Use Scenario: Clamping transient spikes on 24 V DC control lines in PLC I/O modules. IC Role / Device Role / Timing Role: Shunts excess energy above 22 V to ground during EFT events. Use Value: Limits peak voltage to ≤24.2 V (22 V +10%) with 90 mA surge capability, protecting downstream logic inputs.
Reference Voltage Source	Temperature-Stable Biasing
Use Scenario: Generating precise threshold voltage for comparator-based battery undervoltage detection. IC Role / Device Role / Timing Role: Supplies stable 22 V reference to comparator non-inverting input. Use Value: +0.087 %/°C tempco yields only +1.9 V drift over 100°C range, ensuring accurate trip-point tracking.	Use Scenario: Setting collector current in high-reliability BJT amplifier stages operating at elevated temperatures. IC Role / Device Role / Timing Role: Delivers thermally compensated base bias via resistor divider from 22 V Zener. Use Value: Stable 22 V reference enables predictable gain and bias point retention up to +125°C junction temperature.

Power Supply Regulation

Overvoltage Protection

Use Scenario: Stabilizing bias voltage for op-amp input stages in industrial sensor signal conditioning circuits.

IC Role / Device Role / Timing Role: Provides fixed 22 V reference to set common-mode level and improve PSRR.

Use Value: Maintains regulation within ±10% across –40°C to +85°C ambient, enabling consistent ADC offset calibration.

Use Scenario: Clamping transient spikes on 24 V DC control lines in PLC I/O modules.

IC Role / Device Role / Timing Role: Shunts excess energy above 22 V to ground during EFT events.

Use Value: Limits peak voltage to ≤24.2 V (22 V +10%) with 90 mA surge capability, protecting downstream logic inputs.

Reference Voltage Source

Temperature-Stable Biasing

Use Scenario: Generating precise threshold voltage for comparator-based battery undervoltage detection.

IC Role / Device Role / Timing Role: Supplies stable 22 V reference to comparator non-inverting input.

Use Value: +0.087 %/°C tempco yields only +1.9 V drift over 100°C range, ensuring accurate trip-point tracking.

Use Scenario: Setting collector current in high-reliability BJT amplifier stages operating at elevated temperatures.

IC Role / Device Role / Timing Role: Delivers thermally compensated base bias via resistor divider from 22 V Zener.

Use Value: Stable 22 V reference enables predictable gain and bias point retention up to +125°C junction temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N969B	Same 22 V nominal voltage but ±5% tolerance (B suffix); 5.6 mA I_ZT, 750 Ω Z_ZT	Higher regulation accuracy required for precision references or feedback loops	Select 1N969B when tighter voltage control outweighs cost sensitivity
MMBZ5247BS	SOT-23 surface-mount package; 22 V, ±5%; 5.6 mA I_ZT; 750 Ω Z_ZT; 200 mW P_D	Space-constrained PCBs requiring automated placement and reflow compatibility	Choose MMBZ5247BS for high-density designs where DO-35 axial leads are impractical

Compared with 1N969A, 1N969B offers improved voltage accuracy at identical power and thermal specs, while MMBZ5247BS trades package form factor and lower power rating for SMT manufacturability-neither is pin-compatible due to differing packages and mounting methods.

Availability

1N969A is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, precision reference generation, and temperature-stable biasing requiring stable component supply and long-lifecycle support.

Supply support for 1N969A 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.

The 1N957B–1N992B series was designed to deliver JEDEC-standardized, glass-encapsulated Zener regulation with extended temperature range and proven field reliability in mission-critical analog subsystems.

FAQ

What is the Zener voltage tolerance for 1N969A?

The "A" suffix in 1N969A denotes a ±10% tolerance on the nominal 22 V Zener voltage, meaning the actual measured breakdown voltage falls between 19.8 V and 24.2 V at 25°C and 5.6 mA test current. This tolerance is defined per JEDEC registration and verified during production screening. The 1N969A maintains this specification across its full operating temperature range.

Can 1N969A be used in surface-mount designs?

No, the 1N969A is packaged exclusively in the axial-lead DO-35 (DO-204AH) glass case and is not compatible with surface-mount assembly processes. For SMT equivalents, consider the MMBZ5247BS (SOT-23) or MLL969B (MELF DO-213AA), both offering 22 V regulation but differing in power rating, package, and thermal performance. The 1N969A requires through-hole mounting with 3/8″ lead length for rated 500 mW dissipation.

What is the maximum surge current rating for 1N969A?

The 1N969A supports a maximum surge current (I_ZSM) of 90 mA for a 1/120 second pulse duration, as specified in the Microsemi datasheet. This rating applies to square-wave or equivalent half-sine wave transients and is critical for overvoltage clamp applications. Exceeding this value risks irreversible junction damage. The 1N969A's 750 Ω Zener impedance helps limit peak power during such events.

How does temperature affect the regulation voltage of 1N969A?

The 1N969A has a positive temperature coefficient of +0.087 %/°C, meaning its Zener voltage increases by approximately 19.1 mV per °C rise in junction temperature. At 100°C above 25°C, the 22 V nominal voltage rises by ~1.91 V. This behavior is inherent to the 22 V Zener mechanism and is documented in Figure 2 of the Microsemi datasheet. Designers must account for this drift in precision reference applications.

Is 1N969A RoHS compliant?

The base 1N969A part number is not RoHS compliant by default; RoHS compliance requires the "e3" suffix (e.g., 1N969Ae3). Standard 1N969A uses tin-lead (Sn/Pb) plating per MIL-STD-750 Method 2026. When ordering for RoHS-constrained programs, specify the e3 variant to ensure lead-free terminations and full compliance with EU Directive 2011/65/EU. The 1N969Ae3 retains identical electrical and thermal specifications.

1N969A Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: DO-204AA, DO-7, Axial

Packaging:: Bulk

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 22 V

Tolerance:: ±10%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 29 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 16.7 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-7

1N969A FAQ

1.How can I place an order for 1N969A through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N969A 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 1N969A reliable?

The price and inventory of 1N969A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N969A is usually 5 days.

3.What payment methods are accepted for 1N969A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N969A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N969A?

1N969A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N969A 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 1N969A?

For technical support, including 1N969A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N969A requirements.

6.How does Aetrix verify that 1N969A is sourced from the original manufacturer or authorized distributors?

All 1N969A 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 1N969A meets industry standards.

7.What is the process for return or replacement of 1N969A?

All 1N969A units undergo pre-shipment inspection (PSI). If there is an issue with 1N969A, 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 1N969A part is unused and in its original packaging.

Return procedure for 1N969A:

1.Submit a request within 90 days.

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

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