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Microchip Technology JANTXV1N4987DUS/TR
- Part No.:
- JANTXV1N4987DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4987DUS/TR.pdf
- Description:
- DIODE ZENER 160V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,079
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Product details
Overview
JANTXV1N4987DUS/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 ±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 JANTXV1N4987DUS/TR datasheet, JANTXV1N4987DUS/TR pinout, JANTXV1N4987DUS/TR application, or JANTXV1N4987DUS/TR equivalent, key selection criteria include its voidless-glass hermetic seal, Category I metallurgical bond, radiation-hardened construction per MicroNote 050, and compliance with MIL-PRF-19500/356 Class V screening.
Technical Context
This device belongs to the 1N4954US–1N4996US family of military-qualified Zener regulators. Its breakdown behavior is characterized by a well-defined knee at IZK = 5 mA and stable regulation across 10%–50% of IZM (IZM = 930 mA), with ΔVZ ≤ 14 V under those conditions.
The "DUS" suffix denotes surface-mount "E" package (D-5B), voidless hermetic glass construction with tungsten slugs and copper end caps with Sn/Pb finish. Polarity is marked by cathode band; no marking on body per spec.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 160 V ±5% at IZT = 8 mA - defines stable regulation point for high-voltage biasing and clamping |
| Power Dissipation | 5 W @ TEC = 140 °C - requires thermal management via end-cap conduction; derates linearly to zero at 175 °C |
| Dynamic Impedance (ZZT) | 350 Ω @ IZT = 8 mA - determines output voltage stability under load transients |
| Max Reverse Leakage (IR) | 2 μA @ VR = 121.6 V - ensures minimal standby current in high-impedance reference paths |
| Surge Current (IZSM) | 1.4 A @ 8.3 ms half-sine - supports transient overvoltage suppression without failure |
| Temp Coefficient (αVZ) | +0.105 %/°C @ IZT - quantifies voltage drift with temperature; positive slope above ~50 V |
| Forward Voltage (VF) | 1.5 V @ 1.0 A - enables use as low-drop rectifier or crowbar trigger in fault protection |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with two axial end-cap terminals. Cathode identified by band. No body marking. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference | Must be thermally anchored to PCB copper for heat extraction; not rated for solder reflow beyond JEDEC J-STD-020 profile |
| Cathode | Regulated output node in reverse bias; carries Zener current during regulation | Banded end; connects to unregulated rail or transient source; requires trace width sufficient for 930 mA DC |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and internal corrosion; validated for 100% burn-in and life testing per MIL-PRF-19500/356 |
| Category I metallurgical bond | Ensures mechanical integrity under shock/vibration; qualified for missile guidance and avionics mounting |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in board layout |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 - suitable for LEO satellite power systems |
| MIL-PRF-19500/356 JANTXV screening | Includes 100% lot acceptance testing (LAT), stabilized burn-in, and parametric verification - meets Class V reliability requirements |
Applications
| Aerospace Power Bus Clamp | Satellite Voltage Reference |
|---|---|
Use Scenario: Clamping 100–200 V primary bus against lightning-induced surges in launch vehicle power distribution units. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt transient energy into chassis ground. Use Value: Withstands 1.4 A surge for 8.3 ms and maintains regulation within ±5% over –65 °C to +175 °C ambient. |
Use Scenario: Providing stable 160 V reference for ADC biasing and telemetry sensor excitation in geostationary satellite payloads. IC Role / Device Role / Timing Role: Precision voltage reference element in high-impedance divider networks. Use Value: Radiation-hardened construction and <0.1% tempco drift ensure long-term accuracy without recalibration. |
| Tactical Radio RF Stage Bias | Nuclear Instrumentation Supply |
Use Scenario: Setting collector bias for high-power RF transistors in manpack HF radios exposed to wide thermal cycling. IC Role / Device Role / Timing Role: Stable DC bias generator independent of input rail variation. Use Value: 350 Ω dynamic impedance and 5 W rating maintain <±0.5 V regulation across 100–900 mA load steps. |
Use Scenario: Regulating detector bias supply in radiation monitoring equipment deployed in reactor containment zones. IC Role / Device Role / Timing Role: High-reliability voltage clamp protecting front-end amplifiers from EMI-induced spikes. Use Value: Hermetic seal and MIL-spec screening prevent parameter shift after cumulative gamma exposure >100 krad(Si). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4987US | No "D" suffix → ±5% tolerance (vs. ±1% for "D"); otherwise identical electrical specs and screening | Acceptable where tighter voltage tolerance is not required for reference stability | Select JANTXV1N4987DUS/TR when 160 V must remain within ±1.6 V over full temperature and life |
| CDP160E | Commercial-grade, non-hermetic plastic package; 5 W rating but only rated to +150 °C TJ; no MIL screening | Limited to non-safety-critical industrial controls; unsuitable for space or defense deployments | Choose JANTXV1N4987DUS/TR for mission-critical systems requiring hermeticity, radiation tolerance, and extended temperature operation |
Compared with JANTXV1N4987US and CDP160E, JANTXV1N4987DUS/TR uniquely combines ±1% Zener tolerance, voidless-glass hermeticity, Category I bonding, and full MIL-PRF-19500/356 JANTXV qualification - making it the only option for flight-critical voltage regulation where field failure is unacceptable.
Availability
JANTXV1N4987DUS/TR is available at Aetrix Electronics and suitable for aerospace power bus clamping, satellite voltage reference design, and nuclear instrumentation supply applications requiring stable component supply across extended product lifecycles.
Supply support for JANTXV1N4987DUS/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 emphasis on radiation-hardened and high-temperature operation.
The JANTXV1N4987DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 Zener regulator product line, engineered specifically for voltage stabilization in mission-critical power systems where hermetic sealing and extended temperature performance are mandatory.
FAQ
What is the Zener voltage tolerance for JANTXV1N4987DUS/TR?
The "D" suffix in JANTXV1N4987DUS/TR specifies a tight ±1% Zener voltage tolerance at 25 °C, verified per MIL-PRF-19500/356 screening. This is tighter than the standard ±5% tolerance of base-number variants like JANTXV1N4987US. The 160 V nominal value therefore falls between 158.4 V and 161.6 V under test conditions.
Does JANTXV1N4987DUS/TR require derating above 140 °C?
Yes - JANTXV1N4987DUS/TR is rated for 5 W only at an end-cap temperature (TEC) of 140 °C. Power must be derated linearly to zero at 175 °C, per the datasheet's maximum ratings table. This reflects thermal resistance of 7 °C/W junction-to-end-cap, demanding careful PCB thermal design for sustained operation.
Is JANTXV1N4987DUS/TR compatible with lead-free solder reflow?
JANTXV1N4987DUS/TR features Sn/Pb finish on copper end caps and is qualified for traditional eutectic solder processes. While it may survive lead-free reflow (e.g., SAC305 peak at 245 °C), Microsemi's SD44A datasheet does not validate it for Pb-free assembly; use only with Sn/Pb paste unless requalification is performed per J-STD-020.
What does the "TR" suffix indicate in JANTXV1N4987DUS/TR?
The "TR" suffix in JANTXV1N4987DUS/TR denotes tape-and-reel packaging per EIA-481-B standard, enabling automated SMT placement. It does not affect electrical or reliability specifications - all JANTXV1N4987DUS/TR units undergo identical MIL-PRF-19500/356 Class V screening regardless of packaging format.
Can JANTXV1N4987DUS/TR be used in forward-bias applications?
Yes - JANTXV1N4987DUS/TR has a specified forward voltage of 1.5 V at 1.0 A, allowing use as a low-drop series diode or crowbar trigger. However, its primary design intent and qualification are for reverse-bias Zener regulation; forward conduction capability is secondary and not screened to same reliability levels.
JANTXV1N4987DUS/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
JANTXV1N4987DUS/TR FAQ
1.How can I place an order for JANTXV1N4987DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4987DUS/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 JANTXV1N4987DUS/TR reliable?
The price and inventory of JANTXV1N4987DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4987DUS/TR is usually 5 days.
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Once your JANTXV1N4987DUS/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 JANTXV1N4987DUS/TR?
For technical support, including JANTXV1N4987DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4987DUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4987DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4987DUS/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 JANTXV1N4987DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4987DUS/TR?
All JANTXV1N4987DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4987DUS/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 JANTXV1N4987DUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4987DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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