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Microchip Technology JANTXV1N4991DUS/TR
- Part No.:
- JANTXV1N4991DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4991DUS/TR.pdf
- Description:
- DIODE ZENER 240V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,702
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Product details
Overview
JANTXV1N4991DUS/TR from Microsemi is a military-grade, voidless-hermetically-sealed surface-mount 5 W Zener diode with nominal Zener voltage of 240 V, ±5% tolerance, 539 mg mass, and rated for operation from −65 °C to +175 °C - used in high-reliability voltage regulation for avionics power conditioning and radiation-hardened instrumentation.
For engineers reviewing the JANTXV1N4991DUS/TR datasheet, JANTXV1N4991DUS/TR pinout, JANTXV1N4991DUS/TR application, or JANTXV1N4991DUS/TR equivalent, this page delivers verified electrical specs, thermal resistance (10 °C/W), surge current rating (22 A @ 8.3 ms), dynamic impedance (650 Ω @ 5 mA), and hermetic glass package details per MIL-PRF-19500/356.
Technical Context
This device operates as a precision voltage reference and shunt regulator in high-stress environments, leveraging triple-layer passivation and Category III internal metallurgical bonds to ensure stability under thermal cycling and ionizing radiation. Its 240 V nominal Zener voltage is specified at IZT = 5 mA with ΔVZ ≤ 22 V between 10% and 50% of IZM.
The JANTXV1N4991DUS/TR uses an "E" package (also designated D-5B) with copper end caps, Sn/Pb finish, cathode band polarity marking, and EIA-481-B tape-and-reel packaging. It exhibits 0.115 %/°C temperature coefficient and 2 μA maximum reverse leakage at 182 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 240 V @ IZT = 5 mA - defines regulated output voltage under standard test conditions |
| Power Dissipation | 5 W @ TEC = 125 °C - requires heatsinking or board thermal design to maintain junction below 175 °C |
| Dynamic Impedance | 650 Ω @ IZK = 1 mA - determines voltage regulation sensitivity to current variation near knee |
| Thermal Resistance | 10 °C/W junction-to-end-cap - critical for calculating junction temperature rise under load |
| Surge Current | 22 A @ 8.3 ms half-sine - supports transient overvoltage clamping without failure |
| Reverse Leakage | 2 μA max @ 182 V - ensures minimal standby power loss in high-impedance bias networks |
| Temp. Coefficient | +0.115 %/°C @ IZT - quantifies voltage drift across operating temperature range |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs; "E" outline (D-5B); cathode indicated by band; weight 539 mg; Sn/Pb-finished copper end caps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal | Marked by band; connected to regulated voltage rail; sinks current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates internal delamination risk under thermal shock and long-term storage |
| Category III metallurgical bond | Ensures mechanical integrity and low-resistance interface between silicon and slug under vibration and radiation |
| MIL-PRF-19500/356 qualification (JANTXV) | Validated reliability for aerospace and defense systems requiring zero-failure tolerance |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special static control beyond standard Class 1A protocols |
| Inherent radiation hardness | Meets total ionizing dose (TID) requirements per MicroNote 050 without shielding or derating |
Applications
| Avionics Power Bus Regulation | Radiation-Hardened Instrumentation |
|---|---|
Use Scenario: Stabilizing 240 V reference rails in flight control computers exposed to wide thermal swings and cosmic radiation. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining precise bias for analog front-ends and ADC references. Use Value: Delivers <22 V regulation error across 10–50% of max current while surviving 100 krad(Si) TID. | Use Scenario: Providing stable voltage reference in satellite telemetry modules operating in geosynchronous orbit. IC Role / Device Role / Timing Role: High-reliability Zener clamp protecting downstream LDOs from input transients. Use Value: Maintains regulation with only 2 μA leakage at 182 V, minimizing standby current in battery-backed subsystems. |
| Nuclear Reactor Monitoring Systems | High-Voltage Test Equipment Calibration |
Use Scenario: Biasing radiation detector preamplifiers in containment zones where replacement is impossible. IC Role / Device Role / Timing Role: Primary voltage reference in fault-tolerant sensor signal chains. Use Value: Operates continuously from −65 °C to +175 °C with no parameter shift beyond spec limits. | Use Scenario: Calibrating 200–300 V ranges in portable high-voltage multimeters used in field maintenance. IC Role / Device Role / Timing Role: Precision shunt reference traceable to NIST standards via lot-controlled testing. Use Value: ±5% tolerance and documented 0.115 %/°C TC enable direct use in metrology-grade calibration fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4991US | No TR suffix; bulk packaging instead of tape-and-reel; identical electrical and mechanical specs | Preferred for manual prototyping or low-volume hand-soldered assemblies | Select JANTXV1N4991DUS/TR for automated SMT placement; choose JANTXV1N4991US for bench evaluation |
| 1N4991US | Commercial-grade (non-military); lacks JANTXV screening, radiation hardness validation, and MIL-PRF-19500/356 compliance | Suitable only for non-critical industrial or lab equipment with no radiation or extended temp requirements | Use 1N4991US only when cost sensitivity outweighs reliability, radiation, or temperature range needs |
Compared with JANTXV1N4991US and 1N4991US, the JANTXV1N4991DUS/TR provides guaranteed tape-and-reel delivery for production SMT lines, full military screening including burn-in and radiation testing, and documented performance across −65 °C to +175 °C - making it the sole choice for flight-qualified hardware.
Availability
JANTXV1N4991DUS/TR is available at Aetrix Electronics and suitable for avionics power bus regulation, radiation-hardened instrumentation, and nuclear reactor monitoring systems requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTXV1N4991DUS/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 (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The JANTXV1N4991DUS/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener series engineered specifically for voltage regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance for JANTXV1N4991DUS/TR?
The JANTXV1N4991DUS/TR has a nominal Zener voltage of 240 V with a standard tolerance of ±5%, as defined in MIL-PRF-19500/356. This tolerance applies across the full operating temperature range of −65 °C to +175 °C and is verified during JANTXV-level screening. No tighter tolerance suffix (e.g., 'C' or 'D') is assigned to this specific part number, confirming its ±5% specification.
Does JANTXV1N4991DUS/TR require heatsinking in 5 W operation?
Yes - JANTXV1N4991DUS/TR must be mounted on thermally optimized PCB pads or heatsinked to maintain junction temperature ≤175 °C. With a thermal resistance of 10 °C/W junction-to-end-cap and 5 W dissipation, a 50 °C ambient requires ≥45 °C/W system thermal resistance. The "E" package relies on end-cap conduction; pad layout per SD44A.pdf is mandatory for reliable thermal performance.
Is JANTXV1N4991DUS/TR radiation-hardened?
Yes - JANTXV1N4991DUS/TR is inherently radiation-hardened per Microsemi MicroNote 050, with validated performance up to 100 krad(Si) total ionizing dose. This capability stems from its voidless-glass hermetic seal, Category III metallurgical bond, and silicon process controls - all confirmed under JANTXV screening per MIL-PRF-19500/356.
What does the "DUS/TR" suffix mean in JANTXV1N4991DUS/TR?
The "DUS/TR" suffix indicates two key attributes: "DUS" denotes the "E" package (D-5B) with voidless hermetic glass construction and Sn/Pb end caps; "TR" specifies tape-and-reel packaging per EIA-481-B standard, enabling automated SMT placement. This distinguishes it from bulk-packaged variants like JANTXV1N4991US.
Can JANTXV1N4991DUS/TR replace JANTXV1N4991US in production?
Yes - JANTXV1N4991DUS/TR is functionally and electrically identical to JANTXV1N4991US, differing only in packaging (tape-and-reel vs. bulk). Both share identical Zener voltage, thermal resistance, surge rating, and MIL-PRF-19500/356 qualification. The TR version is recommended for high-volume SMT assembly; no PCB or schematic changes are needed.
JANTXV1N4991DUS/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, E
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 240 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 650 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 182 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/356
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- E-MELF
JANTXV1N4991DUS/TR FAQ
1.How can I place an order for JANTXV1N4991DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4991DUS/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 JANTXV1N4991DUS/TR reliable?
The price and inventory of JANTXV1N4991DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4991DUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4991DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4991DUS/TR transactions.
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4.How is shipping managed for JANTXV1N4991DUS/TR?
JANTXV1N4991DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4991DUS/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 JANTXV1N4991DUS/TR?
For technical support, including JANTXV1N4991DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4991DUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4991DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4991DUS/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 JANTXV1N4991DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4991DUS/TR?
All JANTXV1N4991DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4991DUS/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 JANTXV1N4991DUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4991DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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