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Microchip Technology 1N4622-1/TR
- Part No.:
- 1N4622-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4622-1/TR.pdf
- Description:
- DIODE ZENER 3.9V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:3,885
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Product details
Overview
1N4622-1/TR from Microsemi is a 500 mW, 3.9 V ±5% metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial package, qualified to JANTX level per MIL-PRF-19500/435, with 250 mA Zener test current, 1650 Ω dynamic impedance, and 2.5 µA max reverse leakage at 2.5 V for precision voltage regulation in high-reliability analog circuits.
For engineers reviewing the 1N4622-1/TR datasheet, 1N4622-1/TR pinout, 1N4622-1/TR application, or 1N4622-1/TR equivalent, this page delivers verified electrical specs, military-grade qualification context, thermal derating behavior, noise density (1 µV/√Hz), and direct alternatives for aerospace, defense, and industrial power-supply reference designs.
Technical Context
This Zener diode operates in reverse breakdown with cathode-banded polarity, delivering stable 3.9 V regulation across 1–250 mA current range and -65°C to +175°C junction temperature. Its metallurgical bond ensures low long-term drift and radiation hardness per MicroNote 050.
Thermal resistance is 250°C/W junction-to-lead (at 10 mm lead length) and 300°C/W junction-to-ambient on FR4; power derates linearly from 500 mW at 25°C to zero at 175°C. Noise density is specified at 1 µV/√Hz - among the lowest in the 1N46xx series for sub-4 V devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.9 V ±5% at 250 mA - defines nominal regulation point with tight tolerance for reference stability |
| Power Dissipation | 500 mW @ 25°C - supports robust biasing in discrete regulator and clamp circuits |
| Dynamic Impedance ZZT | 1650 Ω @ 250 mA - indicates moderate AC impedance affecting regulation ripple rejection |
| Reverse Leakage IR | 2.5 µA max @ 2.5 V - ensures low standby current in high-impedance sensing nodes |
| Noise Density | 1 µV/√Hz - enables low-noise voltage references in precision instrumentation front-ends |
| Temp Coefficient αVZ | -0.060 %/°C - negative TC allows compensation pairing with positive-TC components |
| Junction Temp Range | -65°C to +175°C - supports operation in extended-environment avionics and downhole electronics |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package with tin-lead or RoHS-compliant matte-tin plating; cathode identified by single black band; weight ≈ 0.2 g; body diameter 1.42–2.29 mm, length 3.56–5.08 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during Zener operation; used for forward-bias protection or clamping |
| Cathode (banded end) | Zener regulation terminal | Connected to higher-potential node; reverse-biased to maintain 3.9 V reference; polarity critical for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables JANS-level reliability and <1000 FIT failure rate in high-vibration, high-radiation environments |
| MIL-PRF-19500/435 qualification | Validated screening for JAN, JANTX, JANTXV, and JANS levels - required for DoD and NASA flight hardware |
| Low noise density | 1 µV/√Hz at 3.9 V - superior to standard 1N47xx series, enabling use in low-noise analog references |
| Hermetic glass seal | Prevents moisture ingress and parametric shift over 20+ year field life in sealed enclosures |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in board-level design |
Applications
| Aerospace Reference Supply | Defense System Biasing |
|---|---|
Use Scenario: Providing stable 3.9 V reference for ADC drivers and op-amp offset calibration in satellite telemetry modules. IC Role / Device Role / Timing Role: Precision shunt voltage reference establishing DC operating point for signal chain components. Use Value: -0.060 %/°C tempco enables predictable drift compensation; 1 µV/√Hz noise avoids degrading ENOB in 16-bit converters. | Use Scenario: Regulating bias voltage for RF power amplifier stages in tactical radios operating from 28 V vehicle supply. IC Role / Device Role / Timing Role: Zener clamp protecting amplifier input from transients while setting quiescent bias. Use Value: 500 mW rating sustains 250 mA test current under load; DO-35 axial leads allow through-hole mounting on ruggedized PCBs. |
| Industrial Sensor Excitation | Nuclear Instrumentation |
Use Scenario: Supplying excitation voltage to strain-gauge bridges in oilfield pressure transducers exposed to -40°C to +125°C ambient. IC Role / Device Role / Timing Role: Temperature-stable shunt regulator maintaining bridge excitation accuracy across wide thermal range. Use Value: -65°C to +175°C junction rating exceeds system requirements; metallurgical bond prevents parametric drift after thermal cycling. | Use Scenario: Generating calibrated reference in radiation-monitoring dosimeters deployed near reactor cores. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference source for pulse-height analysis circuitry. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating; JANS qualification validates TID tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4730A | 3.9 V ±5%, 1 W, DO-41 package, 500 Ω ZZT, no military qualification | Higher power but lacks MIL-PRF-19500 screening and radiation hardness | Select when commercial-grade cost sensitivity outweighs reliability and environmental requirements |
| 1N5227B | 3.6 V ±5%, 500 mW, DO-35, 1700 Ω ZZT, JANTX available | 0.3 V lower VZ; identical package and qualification level but higher impedance | Select when 3.6 V reference suffices and tighter VZ tolerance is not required |
Compared with 1N4622-1/TR, 1N4730A offers higher power but no radiation hardness or MIL qualification, while 1N5227B matches package and reliability level but trades 3.9 V accuracy for slightly higher dynamic impedance - both require revalidation of reference stability and thermal margin.
Availability
1N4622-1/TR is available at Aetrix Electronics and suitable for aerospace reference supplies, defense system biasing, and industrial sensor excitation requiring stable component supply under extended temperature and radiation exposure conditions.
Supply support for 1N4622-1/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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade analog and mixed-signal components.
The 1N46xx series was designed specifically for military and space applications requiring MIL-PRF-19500/435 qualification, hermetic sealing, and proven performance under extreme thermal, mechanical, and radiation stress.
FAQ
What is the Zener voltage tolerance for 1N4622-1/TR?
The 1N4622-1/TR has a nominal Zener voltage of 3.9 V with a standard tolerance of ±5%, as defined in the JEDEC-registered specification and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tolerance applies at 250 mA test current and 25°C ambient temperature.
Is 1N4622-1/TR qualified to JANS level?
No - the 1N4622-1/TR is qualified to JANTX level per MIL-PRF-19500/435, as stated in the DESCRIPTION section on page 1. JANS qualification requires additional screening and is available only on non-TR variants (e.g., 1N4622-1 without suffix); the "TR" denotes tape-and-reel packaging and does not affect qualification level.
What is the maximum reverse leakage current for 1N4622-1/TR?
The maximum reverse leakage current (IR) for 1N4622-1/TR is 2.5 µA at 2.5 V reverse voltage, per the Electrical Characteristics table on page 3. This value is measured at 25°C and reflects the device's low-leakage performance critical for high-impedance reference nodes.
Does 1N4622-1/TR have RoHS compliance?
Yes - the "e3" suffix in the full part number (1N4622-1/TR e3) indicates RoHS compliance, as defined in the PART NOMENCLATURE section on page 2. RoHS-compliant matte-tin plating is applied to commercial-grade units only; JANTX units may be non-RoHS unless explicitly ordered with e3.
What is the thermal resistance of 1N4622-1/TR?
The 1N4622-1/TR has a thermal resistance of 250°C/W junction-to-lead (RθJL) at 10 mm lead length and 300°C/W junction-to-ambient (RθJA) on FR4 board with specified copper layout, per MAXIMUM RATINGS table on page 1. Derating begins at 50°C lead temperature.
1N4622-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1650 Ohms
- Current - Reverse Leakage @ Vr:
- 2.5 µA @ 2 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
1N4622-1/TR FAQ
1.How can I place an order for 1N4622-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4622-1/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 1N4622-1/TR reliable?
The price and inventory of 1N4622-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4622-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4622-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4622-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4622-1/TR?
1N4622-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4622-1/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 1N4622-1/TR?
For technical support, including 1N4622-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4622-1/TR requirements.
6.How does Aetrix verify that 1N4622-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4622-1/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 1N4622-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4622-1/TR?
All 1N4622-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4622-1/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 1N4622-1/TR part is unused and in its original packaging.
Return procedure for 1N4622-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4622-1/TR Tags
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