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Microchip Technology JANS1N4621D-1/TR
- Part No.:
- JANS1N4621D-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4621D-1/TR.pdf
- Description:
- DIODE ZENER 3.6V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,362
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Product details
Overview
JANS1N4621D-1/TR from Microsemi is a 3.6 V, 1% tolerance, 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 voltage regulation. It delivers stable reference voltage at 250 mA test current with 1700 Ω dynamic impedance and -0.065 %/°C temperature coefficient.
For engineers reviewing the JANS1N4621D-1/TR datasheet, JANS1N4621D-1/TR pinout, JANS1N4621D-1/TR application, or JANS1N4621D-1/TR equivalent, key selection criteria include military-grade reliability qualification, 1% Zener voltage tolerance, low noise density (1 µV/√Hz), hermetic DO-35 packaging, and radiation-hardened performance for space-qualified 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 stability under thermal cycling and shock, critical for MIL-qualified applications.
The JANS1N4621D-1/TR exhibits a negative temperature coefficient (-0.065 %/°C), enabling predictable drift compensation in reference circuits, and maintains ≤1 µV/√Hz noise density at its 3.6 V nominal Zener voltage - significantly lower than higher-voltage variants in the same family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V @ 250 mA - provides precise low-voltage reference for analog monitoring and biasing circuits |
| Zener Tolerance | ±1% - enables tight regulation without post-calibration in mission-critical systems |
| Power Dissipation | 500 mW @ TC = 25 °C - supports robust operation with linear derating to zero at 175 °C junction temperature |
| Dynamic Impedance | 1700 Ω @ 250 mA - defines AC regulation stiffness and load transient response capability |
| Noise Density | 1 µV/√Hz @ 25 °C - ensures minimal interference in low-noise reference and sensor signal chains |
| Temp Coefficient | -0.065 %/°C - allows accurate thermal drift modeling for compensated reference designs |
| Max Reverse Current | 2.0 µA @ 2.0 V - guarantees low leakage in standby and low-power modes |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with tin-lead plating; cathode indicated 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 / Zener reference ground node | Connected to system ground or lowest potential point in shunt regulator topology |
| Cathode (banded end) | Zener regulation output / voltage reference node | Provides stable 3.6 V output when reverse-biased; must be held positive relative to anode |
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-750/883 |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and vibration stress |
| 1% Zener voltage tolerance | Reduces need for external trimming in precision reference designs across temperature range |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 - suitable for LEO/MEO missions |
| Low capacitance | Typical <2 pF - preserves high-frequency stability in RF bias and fast-switching regulator feedback paths |
Applications
| Aerospace Power Monitoring | Defense Avionics Reference |
|---|---|
Use Scenario: Regulating and monitoring 3.6 V supply rails in satellite power distribution units (PDUs) during launch and orbit. IC Role / Device Role / Timing Role: Shunt voltage reference and overvoltage clamp protecting ADC front-ends and telemetry sensors. Use Value: JANS1N4621D-1/TR's 1% tolerance and radiation hardness ensure measurement integrity without recalibration after TID exposure. | Use Scenario: Providing stable bias voltage for op-amps and comparators in radar warning receiver (RWR) signal conditioning modules. IC Role / Device Role / Timing Role: Precision DC reference source for analog-to-digital conversion of RF detector outputs. Use Value: JANS1N4621D-1/TR's 1 µV/√Hz noise density prevents SNR degradation in weak-signal detection paths. |
| Tactical Radio Voltage Regulation | Nuclear Command & Control Interface |
Use Scenario: Stabilizing local 3.6 V references in handheld HF/VHF transceivers operating across -55 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Temperature-compensated shunt regulator maintaining reference accuracy across extreme thermal gradients. Use Value: JANS1N4621D-1/TR's -0.065 %/°C tempco enables predictable drift correction in firmware-based calibration routines. | Use Scenario: Securing logic-level translation and isolation interface voltages in hardened command consoles exposed to EMP environments. IC Role / Device Role / Timing Role: ESD-immune, hermetically sealed voltage clamp protecting FPGA I/O banks and serial interface receivers. Use Value: JANS1N4621D-1/TR's non-sensitive-to-ESD rating (MIL-STD-750 Method 1020) ensures survivability during surge events without parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4621D-1 | Same electrical specs; qualified to JANTXV level (lower screening rigor than JANS) | Suitable for high-reliability ground systems but not Class S space flight | Select when full JANS screening is unnecessary and cost reduction is prioritized |
| 1N4621DUR-1 | Same Zener voltage/tolerance; DO-213AA surface-mount package instead of DO-35 | Enables automated assembly and board space reduction, but lacks JANS qualification | Select for commercial or industrial PCBs where MIL-spec is not mandated |
Compared with JANTXV1N4621D-1 and 1N4621DUR-1, the JANS1N4621D-1/TR offers the highest assurance of parametric stability under radiation, thermal cycling, and long-term storage - essential for flight-critical subsystems where rework is impossible.
Availability
JANS1N4621D-1/TR is available at Aetrix Electronics and suitable for aerospace power monitoring, defense avionics reference, and nuclear command & control interface applications requiring stable component supply across extended product lifecycles.
Supply support for JANS1N4621D-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 JANS1N4621D-1/TR belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for precision voltage regulation in radiation-exposed, thermally stressed, and mission-critical electronic systems.
FAQ
What is the Zener voltage tolerance of JANS1N4621D-1/TR?
JANS1N4621D-1/TR has a ±1% Zener voltage tolerance at 25 °C, specified per the "D" suffix in its nomenclature. This tight tolerance is maintained across its qualified operating temperature range (-65 °C to +175 °C) and supports high-accuracy reference design without trimming. The device is tested at 250 mA Zener current (IZT) per MIL-PRF-19500/435 requirements.
Is JANS1N4621D-1/TR radiation-hardened?
Yes, JANS1N4621D-1/TR is inherently radiation-hardened as documented in Microsemi MicroNote 050. Its metallurgically bonded structure and glass DO-35 package provide resistance to total ionizing dose (TID), making it suitable for low-Earth orbit (LEO) and medium-Earth orbit (MEO) satellite applications without additional shielding or derating.
What does the "TR" suffix mean in JANS1N4621D-1/TR?
"TR" indicates tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. JANS1N4621D-1/TR is supplied in reels optimized for high-volume manufacturing, with full traceability and MIL-qualified lot documentation retained for each reel. The underlying device remains identical to the bulk version in all electrical and reliability characteristics.
What is the maximum Zener current for JANS1N4621D-1/TR?
The maximum Zener current (IZM) for JANS1N4621D-1/TR is 83.0 mA at 25 °C, calculated from its 500 mW power rating and 3.6 V nominal Zener voltage. Derating begins linearly at 50 °C case temperature and reaches zero at 175 °C, per Figure 2 in the official datasheet T4-LDS-0245-2.
How is polarity marked on JANS1N4621D-1/TR?
JANS1N4621D-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 positive relative to the anode for proper Zener regulation. This marking complies with JEDEC standards and is verified during MIL-PRF-19500/435 visual inspection screening.
JANS1N4621D-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):
- 3.6 V
- Tolerance:
- ±1%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1.7 Ohms
- Current - Reverse Leakage @ Vr:
- 3.5 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)
JANS1N4621D-1/TR FAQ
1.How can I place an order for JANS1N4621D-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4621D-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 JANS1N4621D-1/TR reliable?
The price and inventory of JANS1N4621D-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 JANS1N4621D-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4621D-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4621D-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4621D-1/TR?
JANS1N4621D-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4621D-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 JANS1N4621D-1/TR?
For technical support, including JANS1N4621D-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4621D-1/TR requirements.
6.How does Aetrix verify that JANS1N4621D-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4621D-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 JANS1N4621D-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4621D-1/TR?
All JANS1N4621D-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4621D-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 JANS1N4621D-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4621D-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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