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Microchip Technology JANTX1N4987CUS/TR
- Part No.:
- JANTX1N4987CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4987CUS/TR.pdf
- Description:
- DIODE ZENER 160V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:5,968
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Product details
Overview
JANTX1N4987US/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation at 140 °C end-cap temperature, with nominal Zener voltage of 160 V at 8 mA test current, ±5% tolerance, and dynamic impedance of 350 Ω at IZT - used in high-reliability voltage regulation for aerospace power conditioning circuits.
For engineers reviewing the JANTX1N4987US/TR datasheet, JANTX1N4987US/TR pinout, JANTX1N4987US/TR application, or JANTX1N4987US/TR equivalent, this part supports critical voltage reference and overvoltage clamping in MIL-PRF-19500/356-compliant systems where failure tolerance, radiation hardness, and wide-temperature operation (–65 °C to +175 °C) are mandatory design requirements.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, delivering stable 160 V reference across 10%–50% of IZM (1440 mA), with voltage regulation ΔVZ ≤ 14 V under that current range. Its voidless-glass hermetic construction ensures zero internal voids and Category I metallurgical bonding per MIL-PRF-19500/356.
It exhibits low thermal resistance (7 °C/W junction-to-end-cap), enabling reliable 5 W operation up to 140 °C end-cap temperature before linear derating to zero at 175 °C. Reverse leakage is limited to 2 μA at VR = 121.6 V, and forward voltage is specified at 1.50 V @ 1.0 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 160 V @ IZT = 8 mA - provides precise 160 V reference under standard test conditions |
| Power Dissipation | 5 W @ TEC = 140 °C - defines maximum continuous power handling with thermal derating above 140 °C |
| Dynamic Impedance ZZT | 350 Ω @ IZT - determines output voltage stability under varying load current |
| Max Reverse Leakage IR | 2 μA @ VR = 121.6 V - ensures minimal parasitic current in high-impedance bias networks |
| Operating Temperature | –65 °C to +175 °C - enables deployment in extreme environmental conditions without derating |
| Thermal Resistance θJC | 7 °C/W junction-to-end-cap - supports efficient heat transfer to PCB or heatsink via end-cap soldering |
| Surge Current IZSM | 1.4 A @ 8.3 ms - withstands transient overvoltage events in protection circuits |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs; "E" package (also designated D-5B); copper end caps with Sn/Pb finish; cathode indicated by band; polarity-critical mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Soldered to ground or low-potential rail; forms return path during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input voltage source; maintains 160 V relative to anode under regulation |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and contaminants, ensuring long-term parameter stability in vacuum or humid environments |
| Category I metallurgical bond | Guarantees mechanical integrity and thermal cycling reliability per MIL-PRF-19500/356 Class JANTX |
| Nonsensitive to ESD | Qualified to MIL-STD-750 Method 1020 - no special handling required during assembly |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for space and nuclear applications without shielding |
| Tape-and-reel packaging | EIA-481-B compliant - supports automated SMT placement with consistent orientation and spacing |
Applications
| Aerospace Power Bus Regulation | High-Voltage Test Equipment Reference |
|---|---|
Use Scenario: Stabilizing 160 V supply rails in satellite power distribution units exposed to thermal cycling and radiation. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining precise 160 V output despite input variation and load transients. Use Value: Enables compliance with MIL-STD-704F voltage tolerance requirements while surviving >100,000 thermal cycles. |
Use Scenario: Providing calibrated 160 V reference in portable high-voltage calibration sources for field metrology. IC Role / Device Role / Timing Role: Precision Zener reference element in feedback loop of programmable HV DC supplies. Use Value: Delivers ±5% initial tolerance and <±0.1%/°C tempco, reducing need for post-calibration trimming. |
| Military Radar Transmitter Bias Clamping | Nuclear Instrumentation Signal Conditioning |
Use Scenario: Clamping gate drive voltage spikes in GaN-based radar pulse modulators operating at 160 V bus. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting sensitive driver ICs from inductive kickback. Use Value: Withstands 1.4 A surge at 8.3 ms and maintains regulation within 14 V over 10%–50% IZM range. |
Use Scenario: Establishing stable bias point for photomultiplier tube (PMT) anode chains in radiation detection systems. IC Role / Device Role / Timing Role: High-stability shunt reference supplying fixed 160 V to PMT dynode ladder. Use Value: Radiation-hardened construction prevents parametric shift after 100 krad(Si) total ionizing dose exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4987US | Higher screening level (JANTXV vs JANTX); tighter lot acceptance testing per MIL-PRF-19500/356 | Required for mission-critical flight hardware where burn-in and life test data are mandated | Select JANTXV1N4987US when full JANTXV qualification documentation and extended reliability data are contractually required |
| 1N4987US | Commercial-grade version; no MIL-PRF-19500/356 qualification; same electrical specs and package | Suitable only for non-military industrial prototypes or cost-sensitive ground support equipment | Choose 1N4987US for development boards or non-certified subsystems where military screening adds unnecessary cost |
Compared with JANTX1N4987US/TR, JANTXV1N4987US offers enhanced reliability verification for flight-critical use, while 1N4987US provides identical performance at lower cost for non-qualified applications - all share the same 160 V Zener voltage, D-5B package, and 5 W rating.
Availability
JANTX1N4987US/TR is available at Aetrix Electronics and suitable for aerospace power regulation, high-voltage test instrumentation, military radar clamping, and nuclear instrumentation requiring stable component supply across extended product lifecycles.
Supply support for JANTX1N4987US/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 defense, aerospace, and industrial markets.
The JANTX1N4987US/TR belongs to Microsemi's legacy MIL-PRF-19500/356 qualified Zener series, engineered specifically for voltage regulation in harsh-environment systems demanding radiation hardness, hermetic sealing, and extended temperature operation.
FAQ
What is the Zener voltage tolerance for JANTX1N4987US/TR?
JANTX1N4987US/TR has a nominal Zener voltage of 160 V with a standard tolerance of ±5%, as defined in MIL-PRF-19500/356. This tolerance applies at 25 °C and IZT = 8 mA. Tighter tolerances (e.g., ±2% or ±1%) require different suffixes (C or D) not present in the JANTX1N4987US/TR designation. The JANTX1N4987US/TR part number confirms the standard 5% variant.
Does JANTX1N4987US/TR require heatsinking in 5 W operation?
JANTX1N4987US/TR is rated for 5 W at an end-cap temperature (TEC) of 140 °C, with thermal resistance of 7 °C/W junction-to-end-cap. Effective heatsinking is required to maintain TEC ≤ 140 °C under full power; PCB copper area, thermal vias, or external heatsinks must be designed to dissipate heat through the end caps. Without thermal management, junction temperature will exceed safe limits.
Is JANTX1N4987US/TR compatible with lead-free reflow processes?
JANTX1N4987US/TR features copper end caps with Sn/Pb finish, making it incompatible with Pb-free reflow profiles. Its termination is explicitly specified as tin/lead (Sn/Pb), and the datasheet does not qualify it for peak temperatures exceeding 220 °C. For RoHS-compliant assembly, alternate parts or requalification per J-STD-020 must be pursued - JANTX1N4987US/TR itself is not lead-free process compatible.
What is the maximum reverse leakage current for JANTX1N4987US/TR?
The maximum reverse leakage current (IR) for JANTX1N4987US/TR is 2 μA at VR = 121.6 V and 25 °C, as specified in the Electrical Characteristics table. This value reflects worst-case leakage under rated reverse voltage and is critical for high-impedance bias networks where leakage could perturb reference accuracy. The JANTX1N4987US/TR specification sheet confirms this limit unambiguously.
How does JANTX1N4987US/TR differ from commercial 1N4987US?
JANTX1N4987US/TR is fully qualified to MIL-PRF-19500/356 with rigorous screening including temperature cycling, burn-in, and lot acceptance testing; 1N4987US lacks military qualification and associated reliability data. Both share identical electrical specs, package (D-5B), and Zener voltage, but only JANTX1N4987US/TR meets requirements for deployed defense systems. The TR suffix indicates tape-and-reel packaging, consistent across both versions.
JANTX1N4987CUS/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):
- 160 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 350 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 121.6 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
JANTX1N4987CUS/TR FAQ
1.How can I place an order for JANTX1N4987CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4987CUS/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 JANTX1N4987CUS/TR reliable?
The price and inventory of JANTX1N4987CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4987CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4987CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4987CUS/TR transactions.
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4.How is shipping managed for JANTX1N4987CUS/TR?
JANTX1N4987CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4987CUS/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 JANTX1N4987CUS/TR?
For technical support, including JANTX1N4987CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4987CUS/TR requirements.
6.How does Aetrix verify that JANTX1N4987CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4987CUS/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 JANTX1N4987CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4987CUS/TR?
All JANTX1N4987CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4987CUS/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 JANTX1N4987CUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4987CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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