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Microchip Technology JANTX1N4621-1
- Part No.:
- JANTX1N4621-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANTX1N4621-1.pdf
- Description:
- DIODE ZENER 3.6V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,731
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Product details
Overview
JANTX1N4621-1 from Microsemi is a 500 mW, 3.6 V ±5% metallurgically bonded glass Zener diode in DO-35 package, qualified to MIL-PRF-19500/435 JANTX level for high-reliability voltage regulation. It delivers stable reference voltage at 250 mA test current, with dynamic impedance of 1700 Ω, noise density ≤1 µV/√Hz, and operates across –65 °C to +175 °C junction temperature range.
For engineers reviewing the JANTX1N4621-1 datasheet, JANTX1N4621-1 pinout, JANTX1N4621-1 application, or JANTX1N4621-1 equivalent, this page provides verified military-grade Zener specifications, thermal derating behavior, noise performance at low voltage, and direct alternatives for precision analog reference and power supply regulation in aerospace, defense, and industrial control systems.
Technical Context
The JANTX1N4621-1 operates as a reverse-biased voltage reference diode with cathode band marking polarity. Its metallurgical bond construction ensures mechanical robustness and long-term stability under thermal cycling and radiation exposure per MicroNote 050.
It exhibits a negative temperature coefficient of –0.065 %/°C and maintains regulation over wide current ranges (IZK to IZM = 83 mA), with minimal capacitance (<10 pF typical) and low leakage (IR ≤ 2.0 µA @ VR = 2.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.6 V ±5% at IZT = 250 mA - defines nominal regulation point with tight tolerance for precision biasing |
| Power Dissipation | 500 mW at TL = 25 °C, linearly derated to zero at 175 °C - sets maximum continuous thermal load on PCB traces |
| Dynamic Impedance ZZT | 1700 Ω at IZT = 250 mA - determines output voltage variation under load current changes |
| Noise Density ND | ≤1 µV/√Hz - enables use in low-noise analog references where signal integrity is critical |
| Reverse Leakage IR | ≤2.0 µA at VR = 2.0 V - ensures minimal error current in high-impedance reference circuits |
| Temp Coefficient αVZ | –0.065 %/°C - quantifies drift direction and magnitude for temperature-compensated designs |
| Junction Temp Range | –65 °C to +175 °C - supports operation in extreme environmental conditions without derating |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed 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 (unbanded end) | Reference ground node | Connected to circuit common; reverse bias requires cathode > anode potential |
| Cathode (banded end) | Zener regulation terminal | Applied positive voltage relative to anode to enter breakdown; carries full Zener current |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANTX qualification | Validated reliability for aerospace and defense programs requiring traceable lot data and screening |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and vibration stress |
| Low noise density (≤1 µV/√Hz) | Enables use in precision instrumentation front-ends without additional filtering |
| Hermetic glass sealing | Prevents moisture ingress and parameter shift over decades of field operation |
| Non-ESD-sensitive per MIL-STD-750 Method 1020 | Allows handling without special ESD controls during manual assembly or rework |
Applications
| Aerospace Power Conditioning | Defense System Reference Supplies |
|---|---|
Use Scenario: Regulating auxiliary bias rails in satellite power management units exposed to thermal vacuum cycles. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 3.6 V for op-amp biasing and ADC reference buffers. Use Value: Maintains regulation accuracy within ±5% across –65 °C to +125 °C ambient while surviving 100 krad(Si) total ionizing dose. |
Use Scenario: Generating calibrated thresholds in missile guidance sensor interface modules. IC Role / Device Role / Timing Role: Precision shunt regulator establishing trip points for analog comparators monitoring gyroscope outputs. Use Value: Delivers <2.0 µA leakage at 2.0 V reverse bias, minimizing comparator input error current in high-impedance sensing paths. |
| Industrial Control Loop References | Radiation-Hardened Test Equipment |
Use Scenario: Stabilizing excitation voltage for RTD bridges in oil & gas downhole telemetry systems. IC Role / Device Role / Timing Role: Low-drift voltage reference compensating for thermal gradients in 175 °C wellhead environments. Use Value: –0.065 %/°C tempco enables predictable drift correction in firmware-based calibration algorithms. |
Use Scenario: Calibrating nuclear reactor monitoring instruments requiring long-term parametric stability. IC Role / Device Role / Timing Role: Primary voltage standard in portable dosimetry calibrators subjected to gamma irradiation. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or periodic recalibration after exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4621US (Microchip) | Same 3.6 V ±5%, DO-35 package, but qualified only to commercial grade with no MIL-PRF-19500 screening | Lacks JANTX-level burn-in, temperature cycling, and radiation testing; unsuitable for flight hardware | Select when cost sensitivity outweighs mission-critical reliability requirements |
| JAN1N4621-1 (Microsemi) | Identical electrical specs and DO-35 package, but qualified only to JAN level (lower screening rigor than JANTX) | Meets basic MIL-PRF-19500/435 but omits JANTX-specific tests like life test and lot acceptance test | Acceptable for non-safety-critical ground support equipment where full JANTX is not mandated |
Compared with JANTX1N4621-1, the JAN1N4621-1 offers identical regulation performance at lower cost and screening depth, while the 1N4621US sacrifices military qualification entirely for commercial pricing-making JANTX1N4621-1 the sole choice for deployed systems requiring guaranteed lifetime reliability under extreme stress.
Availability
JANTX1N4621-1 is available at Aetrix Electronics and suitable for aerospace power conditioning, defense system reference supplies, and industrial control loop references requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTX1N4621-1 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 and mixed-signal components for aerospace, defense, and industrial markets.
The JANTX1N4621-1 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for precision voltage reference and regulation in mission-critical systems where parametric stability under thermal, mechanical, and radiation stress is non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTX1N4621-1?
JANTX1N4621-1 has a nominal Zener voltage of 3.6 V with a tolerance of ±5%, as specified in the Electrical Characteristics table at IZT = 250 mA and 25 °C. This tolerance applies to all JANTX-level units per MIL-PRF-19500/435 screening requirements and is confirmed in the product nomenclature section where blank suffix indicates 5% tolerance.
Does JANTX1N4621-1 require heatsinking in standard PCB layouts?
No, JANTX1N4621-1 does not require external heatsinking when operated at ≤500 mW at TL = 25 °C. Its RθJL = 250 °C/W allows safe dissipation with 3/8″ (10 mm) lead length from body on FR4 board. Derating begins linearly above 50 °C lead temperature, reaching zero at 175 °C.
Is JANTX1N4621-1 RoHS compliant?
No, JANTX1N4621-1 is not RoHS compliant. Per the datasheet, RoHS-compliant versions (suffix e3) are available only for commercial-grade variants-not for JAN, JANTX, JANTXV, or JANS levels. JANTX1N4621-1 uses traditional tin-lead plating per MIL-STD-750.
What is the maximum reverse leakage current for JANTX1N4621-1?
The maximum reverse leakage current (IR) for JANTX1N4621-1 is 2.0 µA at VR = 2.0 V and 25 °C, as stated in the Electrical Characteristics table. This value is measured under standardized test conditions and applies to all JANTX-qualified units.
Can JANTX1N4621-1 be used in surface-mount designs?
No, JANTX1N4621-1 is exclusively packaged in the axial-leaded DO-35 (DO-204AH) through-hole configuration. Surface-mount equivalents such as 1N4621UR-1 (DO-213AA) exist but are not qualified to JANTX level and lack the same screening and reliability validation as JANTX1N4621-1.
JANTX1N4621-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1700 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
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANTX1N4621-1 FAQ
1.How can I place an order for JANTX1N4621-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4621-1 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 JANTX1N4621-1 reliable?
The price and inventory of JANTX1N4621-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4621-1 is usually 5 days.
3.What payment methods are accepted for JANTX1N4621-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4621-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4621-1?
JANTX1N4621-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4621-1 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 JANTX1N4621-1?
For technical support, including JANTX1N4621-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4621-1 requirements.
6.How does Aetrix verify that JANTX1N4621-1 is sourced from the original manufacturer or authorized distributors?
All JANTX1N4621-1 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 JANTX1N4621-1 meets industry standards.
7.What is the process for return or replacement of JANTX1N4621-1?
All JANTX1N4621-1 units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4621-1, 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 JANTX1N4621-1 part is unused and in its original packaging.
Return procedure for JANTX1N4621-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4621-1 Tags
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