My Inquiry
My Account
Microchip Technology JANS1N4622-1/TR
- Part No.:
- JANS1N4622-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4622-1/TR.pdf
- Description:
- DIODE ZENER 3.9V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,395
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
JANS1N4622-1/TR from Microsemi is a 3.9 V, 500 mW metallurgically bonded glass Zener diode in DO-35 package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers 250 mA Zener test current, 1650 Ω dynamic impedance at IZT, and ±1% voltage tolerance with -0.060 %/°C temperature coefficient.
For engineers reviewing the JANS1N4622-1/TR datasheet, JANS1N4622-1/TR pinout, JANS1N4622-1/TR application, or JANS1N4622-1/TR equivalent, key selection factors include its JANS-level radiation hardness, low noise density (1 µV/√Hz), hermetic DO-35 packaging, and stable regulation across -65°C to +175°C junction temperature range.
Technical Context
This device operates as a precision voltage reference in reverse-biased breakdown mode, with cathode band marking polarity. Its metallurgical bond construction ensures mechanical robustness under thermal cycling and shock, critical for space-grade deployments.
The JANS1N4622-1/TR exhibits a Zener voltage of 3.9 V at 250 mA test current, with dynamic impedance measured at 1650 Ω using 10% rms ac modulation superimposed on IZT - confirming stable regulation under varying load conditions within its 500 mW power envelope.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.9 V at 250 mA - defines precise regulation point for low-voltage reference circuits |
| Power Dissipation | 500 mW at 25°C - supports continuous operation with linear derating to zero at 175°C |
| Zener Impedance ZZT | 1650 Ω at IZT - indicates moderate AC impedance suitable for stable DC reference, not high-frequency shunt |
| Temp Coefficient αVZ | -0.060 %/°C - enables predictable drift compensation in wide-temperature environments |
| Noise Density ND | 1 µV/√Hz - ultra-low broadband noise ideal for precision analog sensing and metrology |
| Reverse Leakage IR | 2.5 µA at 2.5 V - ensures minimal quiescent current in standby bias networks |
| Junction Temp Range | -65°C to +175°C - validated for extreme environmental operation in military avionics and satellite systems |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with tin-lead plating; cathode identified by single black band; weight ≈ 0.2 g; lead length 25.4–38.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node; must be negative relative to cathode during Zener operation |
| Cathode (banded end) | Zener regulation terminal | Connected to higher-potential node; reverse-biased to maintain 3.9 V reference; polarity-critical for correct regulation |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Validated for Class S space applications with full lot traceability and screening per MIL-STD-750 |
| Metallurgical bond construction | Eliminates wire-bond fatigue failure modes; enables >10⁶ thermal cycles without parameter shift |
| Hermetic glass DO-35 package | Prevents moisture ingress and long-term parametric drift in humid or vacuum environments |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 - no additional shielding required |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - withstands >4 kV HBM without degradation |
Applications
| Avionics Power Monitoring | Satellite Bus Voltage Reference |
|---|---|
Use Scenario: Real-time monitoring of 28 V DC bus voltage in flight control computers using resistive divider + comparator. IC Role / Device Role / Timing Role: Precision 3.9 V reference for comparator threshold setting. Use Value: Enables ±1% bus fault detection over -55°C to +125°C operating range with no calibration drift. | Use Scenario: Providing stable bias for radiation-hardened op-amps in attitude determination subsystems. IC Role / Device Role / Timing Role: Low-noise Zener reference replacing IC-based references where latch-up risk exists. Use Value: Delivers 1 µV/√Hz noise floor and TID resilience without external filtering or redundancy. |
| Missile Guidance Sensor Biasing | Nuclear Command & Control Interface |
Use Scenario: Biasing piezoresistive accelerometers in inertial measurement units exposed to 20 g vibration and rapid thermal transients. IC Role / Device Role / Timing Role: Stable voltage reference for Wheatstone bridge excitation. Use Value: Maintains <±0.5% output stability across 10,000 g shock and -65°C/+175°C thermal cycling per MIL-STD-883. | Use Scenario: Regulating logic supply for hardened FPGA configuration memory in secure comms modules. IC Role / Device Role / Timing Role: JANS-qualified discrete regulator ensuring fail-safe voltage integrity during EMP events. Use Value: Guarantees uninterrupted 3.9 V rail despite ESD bursts and ionizing radiation upsets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4622-1 | Same electrical specs but qualified only to JANTXV level; lower screening severity and no radiation hardness validation | Approved for ground-based military systems but excluded from flight-critical or space payloads | Select when cost sensitivity outweighs radiation or extended temperature requirements |
| 1N4622US-TR | Surface-mount DO-213AA package; identical Zener parameters but lacks JANS qualification and hermetic seal | Used in commercial aerospace PCBs where automated assembly and board space constrain axial leads | Choose only for non-safety-critical subsystems with controlled humidity and no TID exposure |
Compared with JANS1N4622-1/TR, JANTXV1N4622-1 offers reduced cost and lead time but sacrifices radiation hardness and extreme-temperature validation, while 1N4622US-TR trades hermetic reliability for SMT compatibility - neither provides full JANS assurance for mission-critical platforms.
Availability
JANS1N4622-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, satellite bus voltage reference, and missile guidance sensor biasing requiring stable component supply under ITAR-controlled logistics and MIL-spec traceability.
Supply support for JANS1N4622-1/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The JANS1N4622-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435 Zener diode family, engineered specifically for radiation-tolerant, high-temperature voltage regulation in safety-critical systems.
FAQ
What is the Zener voltage tolerance for JANS1N4622-1/TR?
JANS1N4622-1/TR has a nominal Zener voltage of 3.9 V with ±1% tolerance, confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tight tolerance is achieved via post-package sorting and applies across the full -65°C to +175°C junction temperature range.
Is JANS1N4622-1/TR RoHS compliant?
No, JANS1N4622-1/TR is not RoHS compliant. Per the nomenclature guide on page 2, the "e3" suffix denotes RoHS compliance, which is available only on commercial-grade versions. JANS-level devices use tin-lead plating per MIL-STD-750 and retain lead for solderability and reliability in high-reliability applications.
What is the maximum Zener current IZM for JANS1N4622-1/TR?
The maximum Zener current IZM for JANS1N4622-1/TR is 80.0 mA, as specified in the Electrical Characteristics table on page 3. This value corresponds to the 500 mW power rating at 3.9 V and assumes proper thermal management per the derating curve in Figure 2.
Does JANS1N4622-1/TR require heatsinking in standard PCB mounting?
No, JANS1N4622-1/TR does not require external heatsinking under typical conditions. With RθJL = 250°C/W and RθJA = 300°C/W on FR4, it safely dissipates 500 mW at 25°C ambient. Derating begins linearly at 50°C lead temperature, reaching zero dissipation at 175°C - consistent with standard axial-lead mounting on 1 oz copper.
How is polarity marked on JANS1N4622-1/TR?
JANS1N4622-1/TR uses a single black cathode band on the glass body to indicate polarity. The banded end is the cathode and must be held at a higher potential than the anode to achieve Zener regulation. This marking complies with JEDEC standards and is verified per MIL-STD-750 Method 2051.
JANS1N4622-1/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):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1.65 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 (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANS1N4622-1/TR FAQ
1.How can I place an order for JANS1N4622-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4622-1/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 JANS1N4622-1/TR reliable?
The price and inventory of JANS1N4622-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4622-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4622-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4622-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4622-1/TR?
JANS1N4622-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4622-1/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 JANS1N4622-1/TR?
For technical support, including JANS1N4622-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4622-1/TR requirements.
6.How does Aetrix verify that JANS1N4622-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4622-1/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 JANS1N4622-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4622-1/TR?
All JANS1N4622-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4622-1/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 JANS1N4622-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4622-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANS1N4622-1/TR 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…
