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Microchip Technology JANTX1N4987DUS/TR
- Part No.:
- JANTX1N4987DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4987DUS/TR.pdf
- Description:
- DIODE ZENER 160V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,906
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Product details
Overview
JANTX1N4987DUS/TR from Microsemi is a military-grade, voidless-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 ±5%, dynamic impedance of 350 Ω at 8 mA test current, and operating junction temperature range from –65 °C to +175 °C. It serves as a precision voltage reference and overvoltage clamp in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTX1N4987DUS/TR datasheet, JANTX1N4987DUS/TR pinout, JANTX1N4987DUS/TR application, or JANTX1N4987DUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, hermetic glass package with tungsten slugs, Category I metallurgical bond, radiation-hardened construction per MicroNote 050, and ESD immunity per MIL-STD-750 Method 1020.
Technical Context
This device operates in reverse breakdown mode with tightly controlled Zener voltage regulation across wide current (10%–50% of IZM) and temperature ranges. Its voidless-glass hermetic seal ensures long-term stability under thermal cycling and humidity exposure typical in avionics and satellite subsystems.
The internal metallurgical bond and triple-layer passivation provide robust reliability against mechanical stress and contamination. Electrical performance is specified at 25 °C with ΔVZ ≤14 V between 10% and 50% of IZM, and leakage current limited to 2 μA at 121.6 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 160 V ±5% at 8 mA - defines stable regulation point for high-voltage reference or clamping |
| Power Dissipation | 5 W @ TEC = 140 °C - supports sustained operation in compact, thermally constrained layouts |
| Dynamic Impedance (ZZT) | 350 Ω @ IZT = 8 mA - low AC impedance ensures minimal output voltage variation under load transients |
| Max Reverse Leakage (IR) | 2 μA @ 121.6 V - enables low-power standby modes without significant quiescent loss |
| Operating Temperature | –65 °C to +175 °C - qualified for extreme-environment deployment in space and defense systems |
| Thermal Resistance (RθJC) | 7 °C/W junction-to-end-cap - allows accurate thermal modeling for PCB copper pour and heatsinking |
| Surge Current (IZSM) | 0.7 A @ 8.3 ms - withstands transient overvoltage events such as lightning-induced spikes |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs, "E" package (also known as "D-5B"), surface-mount, cathode indicated by band, weight 539 mg, Sn/Pb-finished copper end caps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to system ground or lowest potential node during Zener operation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Provides stable 160 V reference when biased above breakdown; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and gas migration, ensuring >20-year parametric stability in vacuum and humid environments |
| Category I metallurgical bond | Guarantees mechanical integrity under shock/vibration up to 100 g, critical for launch-phase survivability |
| MIL-PRF-19500/356 qualification | Meets full screening including burn-in, temperature cycling, and lot acceptance testing for Class H reliability |
| Radiation hardness | Specified per Microsemi MicroNote 050 - suitable for low-earth orbit missions with total ionizing dose >100 krad(Si) |
| ESD immunity | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 - eliminates need for external protection in handling-sensitive assemblies |
Applications
| Avionics Power Bus Protection | Satellite Voltage Reference |
|---|---|
|
Use Scenario: Clamping transient overvoltages on 100–200 V DC power buses in flight control electronics. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and crowbar element during load dump or lightning surge events. Use Value: Withstands 0.7 A 8.3 ms surges and maintains <2 μA leakage at 121.6 V, enabling fail-safe bus protection without false triggering. |
Use Scenario: Providing stable 160 V reference for analog telemetry signal conditioning in LEO satellite payloads. IC Role / Device Role / Timing Role: Precision voltage reference source with <±5% tolerance and <0.1%/°C tempco for ADC biasing and sensor excitation. Use Value: Hermetic seal and radiation hardness ensure reference stability over mission lifetime without recalibration drift. |
| Ground Vehicle Weapon System Control | Nuclear Instrumentation Channel |
|
Use Scenario: Regulating auxiliary supply rails in armored vehicle fire-control computers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: High-temperature-stable Zener reference for FPGA I/O bank voltage setting and analog front-end calibration. Use Value: Operates continuously from –65 °C to +175 °C with only 7 °C/W thermal resistance, enabling direct mounting on aluminum chassis without heatsinks. |
Use Scenario: Biasing high-voltage photomultiplier tubes in radiation monitoring equipment deployed in nuclear facilities. IC Role / Device Role / Timing Role: Stable 160 V bias source tolerant of neutron/gamma exposure and thermal cycling during reactor startup/shutdown. Use Value: Radiation-hardened construction per MicroNote 050 and Category I bond prevent parameter shift after 100+ krad(Si) 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 |
|---|---|---|---|
| JANTXV1N4987DUS/TR | Higher screening level (JANTXV vs JANTX), tighter tempco (±0.05%/°C vs ±0.105%/°C), same VZ, package, and power rating | Required for Class K or space-grade programs demanding extended life testing and enhanced radiation assurance | Select JANTXV1N4987DUS/TR when full JANTXV screening and lower temperature coefficient are mandated by program spec |
| 1N4987US (non-military) | No MIL-PRF-19500/356 qualification, no radiation hardness data, wider VZ tolerance (±10%), same electrical specs at 25 °C | Suitable for commercial industrial controls where cost and lead time outweigh reliability requirements | Choose 1N4987US only for non-critical terrestrial applications with relaxed environmental and lifetime requirements |
Compared with JANTX1N4987DUS/TR, JANTXV1N4987DUS/TR adds verified radiation tolerance and tighter thermal drift for mission-critical use, while 1N4987US omits military screening and radiation data-making it unsuitable for aerospace or nuclear instrumentation despite identical nominal Zener voltage.
Availability
JANTX1N4987DUS/TR is available at Aetrix Electronics and suitable for avionics power bus protection, satellite voltage reference, and nuclear instrumentation channel applications requiring stable component supply across extended product lifecycles.
Supply support for JANTX1N4987DUS/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, with core expertise in radiation-hardened and hermetic packaging technologies.
JANTX1N4987DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356-qualified Zener series, engineered specifically for voltage regulation in safety-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance for JANTX1N4987DUS/TR?
JANTX1N4987DUS/TR has a nominal Zener voltage of 160 V with a standard tolerance of ±5%, as defined in the MIL-PRF-19500/356 specification and confirmed in the SD44A datasheet revision E. This tolerance applies across the full operating temperature range and is verified during lot acceptance testing.
Does JANTX1N4987DUS/TR require derating above 140 °C?
Yes, JANTX1N4987DUS/TR must be linearly derated above 140 °C end-cap temperature, reaching zero power dissipation at 175 °C. The derating slope is –35.7 mW/°C, calculated from 5 W over the 140–175 °C interval. Thermal design must account for this using the 7 °C/W junction-to-end-cap resistance.
Is JANTX1N4987DUS/TR compatible with lead-free soldering processes?
No, JANTX1N4987DUS/TR features Sn/Pb-finished copper end caps and is not qualified for lead-free reflow profiles. Its maximum peak reflow temperature is limited to 235 °C per MIL-STD-202 Method 210, and exposure to lead-free soldering (≥260 °C) risks intermetallic degradation and hermeticity loss.
What is the maximum reverse leakage current for JANTX1N4987DUS/TR?
JANTX1N4987DUS/TR exhibits a maximum reverse leakage current of 2 μA at 121.6 V (76% of VZ) and 25 °C, as specified in the Electrical Characteristics table. This value remains ≤5 μA across the full –65 °C to +175 °C operating range per MIL-PRF-19500/356 screening.
How is polarity identified on JANTX1N4987DUS/TR?
JANTX1N4987DUS/TR uses a cathode band to indicate polarity - the banded end is the cathode terminal, which connects to the higher-potential node during Zener operation. This marking is visible on the voidless glass body and aligns with JEDEC-standard orientation for surface-mount Zeners in the "E" package.
JANTX1N4987DUS/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:
- ±1%
- 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
JANTX1N4987DUS/TR FAQ
1.How can I place an order for JANTX1N4987DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4987DUS/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 JANTX1N4987DUS/TR reliable?
The price and inventory of JANTX1N4987DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4987DUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4987DUS/TR?
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JANTX1N4987DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4987DUS/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 JANTX1N4987DUS/TR?
For technical support, including JANTX1N4987DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4987DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4987DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4987DUS/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 JANTX1N4987DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4987DUS/TR?
All JANTX1N4987DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4987DUS/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 JANTX1N4987DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4987DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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