My Inquiry
My Account
Microchip Technology 1N4622-1
- Part No.:
- 1N4622-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4622-1.pdf
- Description:
- DIODE ZENER 3.9V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:6,737
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4622-1 from Microsemi is a 500 mW, 3.9 V Zener diode in DO-35 glass package, qualified to JANTXV level per MIL-PRF-19500/435, with 250 mA test current, 1650 Ω dynamic impedance, and -0.060 %/°C temperature coefficient - used for precision voltage regulation in military power supplies and analog reference circuits.
For engineers reviewing the 1N4622-1 datasheet, 1N4622-1 pinout, 1N4622-1 application, or 1N4622-1 equivalent, this page delivers verified electrical specs, mil-grade reliability context, thermal derating behavior, noise density (1 µV/√Hz), and direct alternatives for high-reliability analog design.
Technical Context
This axial-leaded Zener diode operates in reverse breakdown with cathode-banded polarity, requiring banded end positive relative to anode for regulation. Its metallurgically bonded junction ensures stable voltage regulation across -65 °C to +175 °C and low noise density (1 µV/√Hz at 3.9 V).
Thermal resistance is 250 °C/W junction-to-lead (at 10 mm lead length) and 300 °C/W junction-to-ambient on FR4 board; power derates linearly from 500 mW at 25 °C to zero at 175 °C under ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.9 V at 250 mA - precise regulation point for low-voltage reference rails |
| Power Dissipation | 500 mW at 25 °C - supports stable operation in compact through-hole layouts |
| Dynamic Impedance ZZT | 1650 Ω - defines output impedance in regulation region, critical for load transient response |
| Temp Coefficient αVZ | -0.060 %/°C - enables predictable drift compensation in wide-temperature designs |
| Noise Density ND | 1 µV/√Hz - ultra-low broadband noise for precision analog references |
| Reverse Leakage IR | 2.5 µA @ 2.0 V - ensures minimal error current in high-impedance bias networks |
| Junction Temp Range | -65 °C to +175 °C - validated for aerospace, defense, and downhole electronics |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-glass package with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by band; weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; must be at lower potential than cathode during regulation |
| Cathode (banded end) | Zener regulation terminal | Applied positive bias relative to anode; delivers regulated 3.9 V output when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Ensures long-term parameter stability and reduced parameter shift under thermal cycling |
| JANTXV qualification | Validated for high-reliability applications per MIL-PRF-19500/435 with full lot traceability |
| Low capacitance | Typical <1.0 pF - preserves high-frequency signal integrity in RF bias and timing circuits |
| ESD robustness | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
| Radiation hardness | Inherently radiation-tolerant as documented in MicroNote 050 - suitable for space-qualified systems |
Applications
| Military Power Supply Reference | Aerospace Sensor Biasing |
|---|---|
Use Scenario: Provides stable 3.9 V reference for ±15 V DC-DC converter feedback networks in airborne avionics modules. IC Role / Device Role / Timing Role: Zener regulator establishing precision voltage threshold for error amplifiers and PWM controllers. Use Value: -0.060 %/°C tempco and 1650 Ω ZZT minimize output drift and ripple under thermal transients up to 175 °C. | Use Scenario: Supplies bias voltage to piezoresistive pressure transducers in satellite propulsion control systems. IC Role / Device Role / Timing Role: Low-noise (1 µV/√Hz), low-capacitance (≈0.8 pF) voltage reference for high-impedance sensor excitation. Use Value: Hermetic DO-35 package and JANTXV qualification ensure reliability in vacuum and radiation environments. |
| Downhole Instrumentation Regulator | Secure Communications Analog Front-End |
Use Scenario: Regulates supply for op-amps and ADC drivers in oil/gas logging tools operating at 150 °C ambient. IC Role / Device Role / Timing Role: Primary voltage clamp protecting downstream analog circuitry from overvoltage events. Use Value: Full -65 °C to +175 °C junction rating and 250 °C/W RθJL enable direct mounting without heatsinking. | Use Scenario: Sets reference level for encrypted audio codec biasing in tactical radios with TEMPEST compliance requirements. IC Role / Device Role / Timing Role: Low-noise, radiation-hardened Zener providing tamper-resistant analog reference. Use Value: Inherent radiation hardness (MicroNote 050) and 1 µV/√Hz noise meet MIL-STD-461 CS114 conducted emission limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4622UR-1 | Same electrical specs, DO-213AA surface-mount package instead of DO-35 | Required for automated SMT assembly; lacks axial-leaded mechanical mounting flexibility | Select when PCB space constraints or reflow-only manufacturing prohibit through-hole placement |
| 1N4622-1 (JANS) | Identical electrical and thermal specs, but qualified to JANS level (highest MIL-PRF-19500 reliability tier) | Required for mission-critical spaceflight or nuclear command systems where failure is not acceptable | Select only when JANS certification documentation and extended screening (e.g., burn-in, radiation testing) are contractually mandated |
Compared with 1N4622UR-1 and 1N4622-1 (JANS), the standard 1N4622-1 offers optimal balance of JANTXV reliability, axial-leaded serviceability, and cost for defense-grade ground systems - avoiding SMT process overhead while exceeding commercial-grade Zeners in thermal and radiation performance.
Availability
1N4622-1 is available at Aetrix Electronics and suitable for military power supplies, aerospace sensor biasing, and downhole instrumentation requiring stable component supply with full MIL-PRF-19500 traceability and long-lifecycle support.
Supply support for 1N4622-1 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 analog, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N4622-1 belongs to Microsemi's legacy 500 mW metallurgically bonded Zener family, designed specifically for precision voltage regulation in harsh-environment electronics where parameter stability, low noise, and MIL-spec qualification are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4622-1?
The 1N4622-1 has a nominal Zener voltage of 3.9 V with a standard tolerance of ±5% per JEDEC registration. It is also available in tighter tolerances (±2% and ±1%) via suffix codes C and D respectively, though the base 1N4622-1 part uses the 5% variant unless otherwise specified in ordering.
Is 1N4622-1 RoHS compliant?
Yes, the 1N4622-1 is available in RoHS-compliant versions marked with the "e3" suffix (e.g., 1N4622-1e3), featuring annealed matte-tin plating. RoHS compliance applies only to commercial-grade units; mil-spec variants (JAN/JANTX/JANTXV/JANS) retain traditional tin-lead plating per MIL-STD-750.
What is the maximum reverse leakage current for 1N4622-1?
The 1N4622-1 exhibits a maximum reverse leakage current (IR) of 2.5 µA at 2.0 V reverse voltage and 25 °C, as specified in the Electrical Characteristics table. This low leakage supports use in high-impedance bias networks without introducing significant error currents.
Can 1N4622-1 be used in surface-mount designs?
No - the standard 1N4622-1 uses the axial-leaded DO-35 (DO-204AH) package. For surface-mount compatibility, select the functionally identical 1N4622UR-1 in DO-213AA package, which shares all electrical parameters but replaces axial leads with solderable surface-mount terminals.
What is the thermal resistance of 1N4622-1 and how does it affect layout?
The 1N4622-1 has a junction-to-lead thermal resistance (RθJL) of 250 °C/W at 10 mm lead length, and junction-to-ambient (RθJA) of 300 °C/W on FR4 with 4 mm² copper pads. Layout must provide adequate copper area and lead length to maintain TJ ≤ 175 °C; derating begins at 50 °C lead temperature.
1N4622-1 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):
- 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 FAQ
1.How can I place an order for 1N4622-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4622-1 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 reliable?
The price and inventory of 1N4622-1 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 is usually 5 days.
3.What payment methods are accepted for 1N4622-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4622-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4622-1?
1N4622-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4622-1 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?
For technical support, including 1N4622-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4622-1 requirements.
6.How does Aetrix verify that 1N4622-1 is sourced from the original manufacturer or authorized distributors?
All 1N4622-1 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 meets industry standards.
7.What is the process for return or replacement of 1N4622-1?
All 1N4622-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4622-1, 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 part is unused and in its original packaging.
Return procedure for 1N4622-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4622-1 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
