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Microchip Technology JANS1N4621-1/TR
- Part No.:
- JANS1N4621-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4621-1/TR.pdf
- Description:
- DIODE ZENER 3.6V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,094
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Product details
Overview
JANS1N4621-1/TR from Microsemi is a 500 mW, 3.6 V Zener diode in DO-35 glass package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers 3.6 V regulation at 250 mA test current, with 1% voltage tolerance, 1700 Ω dynamic impedance, and -0.065 %/°C temperature coefficient.
For engineers reviewing the JANS1N4621-1/TR datasheet, JANS1N4621-1/TR pinout, JANS1N4621-1/TR application, or JANS1N4621-1/TR equivalent, key selection criteria include its JANS-level radiation hardness, low noise density (1 µV/√Hz), metallurgically bonded construction, and axial-leaded DO-35 package suitable for hermetic through-hole mounting in harsh-environment power regulation circuits.
Technical Context
This device operates as a precision voltage reference in reverse-biased breakdown mode, with regulation stable across wide current (250 mA IZT) and temperature (-65 °C to +175 °C) ranges. Its metallurgical bond ensures mechanical integrity under thermal cycling and shock, critical for space-grade deployments.
The JANS1N4621-1/TR exhibits low capacitance (typical <2 pF at 0 V, per Figure 3), minimal leakage (≤2.0 µA at 2.0 V VR), and tightly controlled temperature coefficient (-0.065 %/°C), enabling use in low-drift analog references and bias networks where parametric stability is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.6 V at 250 mA - precise reference point for low-voltage regulation and clamping |
| Power Dissipation | 500 mW at 25 °C - supports robust operation in compact, unheatsinked layouts |
| Dynamic Impedance ZZT | 1700 Ω - defines regulation stiffness; lower values improve load regulation linearity |
| Temp Coefficient αVZ | -0.065 %/°C - enables predictable drift compensation in temperature-critical circuits |
| Noise Density ND | 1 µV/√Hz - ultra-low broadband noise ideal for precision analog references |
| Reverse Leakage IR | ≤2.0 µA at 2.0 V - ensures minimal quiescent current in standby or low-power modes |
| Package | DO-35 (DO-204AH) - hermetically sealed axial-glass package rated for JANS-level reliability |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package with cathode indicated by band; banded end is positive during Zener operation. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded lead | Connected to circuit ground or lower-potential node during Zener regulation |
| Cathode | Banded lead | Connected to regulated output or higher-potential node; carries full Zener current |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Guarantees radiation hardness, extended temperature range (-65 °C to +175 °C), and screening for spaceflight use |
| Metallurgical bond construction | Prevents delamination under thermal stress and mechanical shock, ensuring long-term parameter stability |
| 1% Zener voltage tolerance | Enables tighter system-level voltage margining without post-calibration trimming |
| Ultra-low noise density | 1 µV/√Hz supports high-resolution ADC references and low-noise amplifier biasing |
| Hermetic glass sealing | Eliminates moisture ingress and corrosion risk in high-humidity or vacuum environments |
Applications
| Spacecraft Power Regulation | Aerospace Sensor Biasing |
|---|---|
Use Scenario: Regulating reference voltage for DC-DC converter feedback loops in satellite power distribution units. IC Role / Device Role / Timing Role: Zener diode provides stable 3.6 V reference for error amplifiers and PWM controllers. Use Value: JANS qualification ensures uninterrupted operation under total ionizing dose (TID) exposure up to 100 krad(Si). | Use Scenario: Supplying bias voltage to radiation-hardened op-amps and precision transducers in flight control systems. IC Role / Device Role / Timing Role: Low-noise 3.6 V reference source for analog front-end signal conditioning. Use Value: 1 µV/√Hz noise density prevents degradation of sensor SNR in low-level signal chains. |
| Defense Radar Bias Networks | Nuclear Instrumentation References |
Use Scenario: Establishing stable bias points for GaN RF amplifier stages in airborne radar transceivers. IC Role / Device Role / Timing Role: Zener diode sets gate bias voltage while rejecting supply ripple and EMI. Use Value: 1700 Ω dynamic impedance maintains regulation accuracy despite fast transient loading. | Use Scenario: Providing calibrated reference voltage for neutron detector pulse-height analyzers in reactor monitoring systems. IC Role / Device Role / Timing Role: Precision voltage clamp defining ADC input scaling thresholds. Use Value: -0.065 %/°C tempco enables accurate temperature-compensated energy calibration over 100 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4621-1 | Same electrical specs; qualified to JANTXV (not JANS) per MIL-PRF-19500/435; no radiation hardness assurance | Suitable for high-reliability ground-based military systems but not spaceflight | Select when radiation tolerance is not required and cost sensitivity favors JANTXV screening |
| 1N4621US-1 | Same Zener voltage and DO-35 package; commercial-grade only, no MIL qualification; RoHS compliant (e3) | Applicable for industrial test equipment or non-safety-critical avionics prototypes | Select for rapid prototyping or cost-sensitive production where MIL spec is unnecessary |
Compared with JANS1N4621-1/TR, JANTXV1N4621-1 offers identical regulation performance but lacks JANS-level radiation hardening and extended screening, while 1N4621US-1 trades all military qualifications for RoHS compliance and lower unit cost-making it viable only in benign environments.
Availability
JANS1N4621-1/TR is available at Aetrix Electronics and suitable for spacecraft power regulation, aerospace sensor biasing, and defense radar bias networks requiring stable component supply across extended product lifecycles.
Supply support for JANS1N4621-1/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 JANS1N4621-1/TR belongs to Microsemi's MIL-qualified Zener diode family, engineered specifically for radiation-tolerant voltage reference and regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage and test current for JANS1N4621-1/TR?
JANS1N4621-1/TR has a nominal Zener voltage of 3.6 V measured at a test current (IZT) of 250 mA. This value is guaranteed within ±1% tolerance and specified under thermal equilibrium at 25 °C ambient. The device maintains regulation across its full operating current range, supporting stable reference generation in demanding power systems.
Is JANS1N4621-1/TR radiation hardened?
Yes, JANS1N4621-1/TR is radiation hardened per Microsemi MicroNote 050 and qualified to JANS level under MIL-PRF-19500/435. It exhibits inherent resistance to total ionizing dose (TID) and single-event effects, making JANS1N4621-1/TR suitable for low-earth orbit and deep-space missions where radiation-induced parameter shift must be minimized.
What is the maximum power dissipation and derating behavior of JANS1N4621-1/TR?
JANS1N4621-1/TR has a rated average power dissipation of 500 mW at 25 °C case temperature. Power must be linearly derated starting at 50 °C, reaching zero at 175 °C. On a typical FR4 board, derating begins at 25 °C ambient, ensuring safe operation in high-temperature enclosures without forced cooling.
Does JANS1N4621-1/TR have low noise characteristics?
Yes, JANS1N4621-1/TR delivers ultra-low noise density of 1 µV/√Hz at its 250 mA test current. This specification is confirmed in the manufacturer's noise measurement circuit (Figure 1) and makes JANS1N4621-1/TR especially valuable in precision analog circuits such as ADC references and low-noise amplifier bias networks.
What packaging and marking does JANS1N4621-1/TR use?
JANS1N4621-1/TR uses the hermetically sealed DO-35 (DO-204AH) axial-glass package with cathode identified by a band. It is supplied in tape-and-reel format (TR suffix), marked with the full part number. Lead plating is tin-lead per MIL-STD-750 Method 2026, ensuring reliable solderability in high-reliability assembly processes.
JANS1N4621-1/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:
- ±5%
- 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)
JANS1N4621-1/TR FAQ
1.How can I place an order for JANS1N4621-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4621-1/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 JANS1N4621-1/TR reliable?
The price and inventory of JANS1N4621-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4621-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4621-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4621-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4621-1/TR?
JANS1N4621-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4621-1/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 JANS1N4621-1/TR?
For technical support, including JANS1N4621-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4621-1/TR requirements.
6.How does Aetrix verify that JANS1N4621-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4621-1/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 JANS1N4621-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4621-1/TR?
All JANS1N4621-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4621-1/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 JANS1N4621-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4621-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANS1N4621-1/TR Tags
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