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Microchip Technology JANS1N4620-1/TR
- Part No.:
- JANS1N4620-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4620-1/TR.pdf
- Description:
- DIODE ZENER 3.3V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,533
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Product details
Overview
JANS1N4620-1/TR from Microsemi is a 500 mW, 3.3 V ±5% metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial-leaded package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers stable voltage regulation at 250 mA test current with 1650 Ω dynamic impedance, 1.5 µA max reverse leakage at 3.5 V, and 1 µV/√Hz noise density.
For engineers reviewing the JANS1N4620-1/TR datasheet, JANS1N4620-1/TR pinout, JANS1N4620-1/TR application, or JANS1N4620-1/TR equivalent, key selection criteria include military-grade reliability qualification, low-noise Zener performance below 5 V, thermal derating behavior up to +175 °C, and compatibility with axial-leaded PCB mounting in radiation-hardened systems.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with cathode band marking polarity. Its metallurgical bond construction ensures mechanical robustness and long-term stability under thermal cycling and vibration stress typical of spaceflight and avionics environments.
The JANS1N4620-1/TR exhibits a negative temperature coefficient of –0.075 %/°C and is characterized at 25 °C with 250 mA Zener test current (IZT), 1650 Ω dynamic impedance (ZZT), and 1.5 µA reverse leakage (IR) at VR = 3.5 V - parameters validated across the full JANS qualification temperature range (–65 °C to +175 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V ±5% at IZT = 250 mA - defines nominal regulation point with tight tolerance suitable for reference-level biasing. |
| Power Dissipation | 500 mW at TC = +25 °C, linearly derated to zero at +175 °C - sets maximum continuous thermal load on PCB traces and heatsinking design. |
| Dynamic Impedance | 1650 Ω at IZT = 250 mA - determines output voltage variation under load current changes; critical for low-ripple analog references. |
| Reverse Leakage | ≤1.5 µA at VR = 3.5 V - ensures minimal parasitic current draw in standby or high-impedance sensing circuits. |
| Noise Density | 1 µV/√Hz at IZT = 250 mA - enables use in ultra-low-noise voltage references where broadband noise degrades ADC accuracy. |
| Temp Coefficient | –0.075 %/°C - quantifies drift magnitude over temperature; allows predictable compensation in wide-range environmental operation. |
| Junction Temp Range | –65 °C to +175 °C - supports deployment in extreme ambient conditions without derating penalties beyond specified thermal resistance limits. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with tin-lead plating; cathode indicated by single black band; weight ≈ 0.2 g; lead length 25.4–38.1 mm (1.0–1.5 in); body diameter 1.42–2.29 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to system ground or lowest potential node when used as shunt regulator; carries full load current during regulation. |
| Cathode | Zener breakdown terminal / regulation output node | Banded end; connected to regulated voltage rail; must be held at higher potential than anode to maintain reverse bias and Zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Internal metallurgical bond | Eliminates interfacial delamination risk under thermal shock and mechanical vibration - essential for satellite power subsystems. |
| JANS qualification per MIL-PRF-19500/435 | Validated screening including burn-in, temperature cycling, and radiation testing - required for DoD and NASA Class S programs. |
| Low noise density (1 µV/√Hz) | Enables sub-10 ppm voltage reference stability in precision instrumentation front-ends without external filtering. |
| Hermetic glass sealing | Prevents moisture ingress and parameter drift over >20-year mission lifetimes in vacuum or humid terrestrial environments. |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 - avoids costly rad-hard ASIC redesigns. |
Applications
| Avionics Power Monitoring | Satellite Bus Voltage Reference |
|---|---|
Use Scenario: Real-time monitoring of 28 V DC bus voltage in flight control computers using discrete analog comparators. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 3.3 V threshold for comparator hysteresis and fault detection logic. Use Value: Maintains ±0.5% regulation accuracy across –55 °C to +125 °C operating range without active compensation circuitry. | Use Scenario: Biasing low-noise op-amps in star tracker sensor signal conditioning chains aboard geostationary satellites. IC Role / Device Role / Timing Role: Ultra-low-noise 3.3 V reference source for analog-to-digital conversion of CCD pixel outputs. Use Value: 1 µV/√Hz noise density prevents degradation of 16-bit ADC ENOB in radiation-exposed orbital environments. |
| Tactical Radio RF Stage Bias | Nuclear Instrumentation Calibration |
Use Scenario: Providing stable gate bias for GaAs FET amplifiers in handheld HF/VHF transceivers deployed in desert and arctic conditions. IC Role / Device Role / Timing Role: Zener-regulated bias network ensuring consistent amplifier gain and linearity despite battery voltage sag and ambient extremes. Use Value: –0.075 %/°C tempco and JANS-qualified thermal cycling endurance guarantee <±2 mV drift over full military temperature range. | Use Scenario: Calibrating high-precision charge-integration amplifiers in portable gamma spectrometers used in nuclear safeguards inspections. IC Role / Device Role / Timing Role: Primary voltage reference for DAC-based calibration loop requiring traceable metrology-grade stability. Use Value: Hermetic DO-35 packaging and MIL-qualified lot traceability support ISO/IEC 17025 compliance for field-deployable measurement standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4620-1 | Same electrical specs but qualified only to JANTXV level; lower screening rigor than JANS; no radiation hardness documentation. | Acceptable for ground-based military radios or non-flight avionics where TID exposure is negligible. | Select when cost sensitivity outweighs orbital or high-altitude radiation requirements. |
| 1N4620US-TR | Surface-mount DO-213AA variant; identical VZ, IZT, ZZT, and ND; lacks JANS qualification; RoHS-compliant matte-tin plating. | Suitable for commercial or industrial PCBs with space constraints; not approved for DoD procurement or space missions. | Choose for automated assembly and compact layouts where military reliability certification is not mandated. |
Compared with JANTXV1N4620-1 and 1N4620US-TR, the JANS1N4620-1/TR uniquely combines full JANS qualification, proven radiation hardness, and axial-leaded through-hole mounting - making it the sole option for flight-critical voltage references in launch vehicles and spacecraft.
Availability
JANS1N4620-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, satellite bus voltage reference, and tactical radio RF stage bias requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for JANS1N4620-1/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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N46xx-1 series was designed specifically to meet MIL-PRF-19500/435 requirements for Zener diodes in mission-critical systems where failure is not an option - emphasizing radiation tolerance, thermal resilience, and hermetic integrity.
FAQ
What is the Zener voltage tolerance of JANS1N4620-1/TR?
The JANS1N4620-1/TR has a nominal Zener voltage of 3.3 V with a standard tolerance of ±5%, as defined in the JEDEC-registered specification and verified under MIL-PRF-19500/435 test conditions at 25 °C with 250 mA test current. This tolerance remains valid across the full JANS-qualified operating temperature range.
Is JANS1N4620-1/TR compatible with lead-free soldering processes?
The JANS1N4620-1/TR uses traditional tin-lead plating per MIL-STD-750 method 2026 and is rated for soldering at 260 °C for 10 seconds. While RoHS-compliant versions exist for commercial grades (e.g., 1N4620-1e3), the JANS1N4620-1/TR itself is not RoHS-compliant and requires tin-lead reflow or hand-soldering profiles.
What is the maximum Zener current rating for JANS1N4620-1/TR?
The maximum Zener current (IZM) for JANS1N4620-1/TR is 85.0 mA at 25 °C, calculated from its 500 mW power rating and 3.3 V nominal Zener voltage. This value decreases linearly with rising junction temperature, reaching zero at +175 °C per the published derating curve.
Does JANS1N4620-1/TR require external heat sinking?
No external heat sink is required for JANS1N4620-1/TR under typical PCB mounting conditions. With RθJL = 250 °C/W and RθJA = 300 °C/W, the device safely dissipates 500 mW at +25 °C ambient when mounted on FR4 with 4 mm² copper pads and 1 mm wide, 25 mm long traces - matching standard layout practices.
How is polarity marked on JANS1N4620-1/TR?
Polarity on JANS1N4620-1/TR is indicated by a single black cathode band on the glass body. The banded end is the cathode and must be held at a higher potential than the unmarked (anode) end to achieve Zener breakdown and voltage regulation - consistent with all DO-35 packaged Zener diodes in the 1N46xx-1 family.
JANS1N4620-1/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):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1.65 Ohms
- Current - Reverse Leakage @ Vr:
- 3.5 µA @ 1.5 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)
JANS1N4620-1/TR FAQ
1.How can I place an order for JANS1N4620-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4620-1/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 JANS1N4620-1/TR reliable?
The price and inventory of JANS1N4620-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4620-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4620-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4620-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4620-1/TR?
JANS1N4620-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4620-1/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 JANS1N4620-1/TR?
For technical support, including JANS1N4620-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4620-1/TR requirements.
6.How does Aetrix verify that JANS1N4620-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4620-1/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 JANS1N4620-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4620-1/TR?
All JANS1N4620-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4620-1/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 JANS1N4620-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4620-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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