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Microchip Technology JANS1N4987CUS/TR
- Part No.:
- JANS1N4987CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANS1N4987CUS/TR.pdf
- Description:
- DIODE ZENER 160V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:5,542
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Product details
Overview
JANS1N4987CUS/TR from Microsemi is a hermetically sealed, voidless-glass 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 (C suffix), and maximum dynamic impedance of 350 Ω at IZT - designed for high-reliability voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the JANS1N4987CUS/TR datasheet, JANS1N4987CUS/TR pinout, JANS1N4987CUS/TR application, or JANS1N4987CUS/TR equivalent, this part is selected for mission-critical analog reference, overvoltage clamping, and precision biasing where radiation hardness, ESD immunity per MIL-STD-750 Method 1020, and operation from –65 °C to +175 °C are mandatory.
Technical Context
This device belongs to the MIL-PRF-19500/356 qualified JANS series, featuring Category I internal metallurgical bonds and triple-layer passivation for enhanced reliability. It operates as a two-terminal voltage reference with sharp reverse breakdown and low leakage (<2 μA at 121.6 V) across its full temperature range.
The 160 V nominal Zener voltage is stabilized by low temperature coefficient (+0.105 %/°C) and exhibits regulated voltage change (ΔVZ) ≤14 V between 10% and 50% of IZM. Its thermal resistance is 7 °C/W junction-to-end-cap, enabling stable 5 W operation under controlled PCB thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ @ IZT | 160 V ±5% at 8 mA - sets precise clamping threshold for 120–180 V rail protection |
| Power Dissipation | 5 W @ TEC = 140 °C - requires heatsinking or copper pour for sustained full-power operation |
| Dynamic Impedance ZZ @ IZT | 350 Ω - ensures minimal output voltage variation under load current transients |
| Max Reverse Leakage IR | 2 μA @ 121.6 V - enables low-error bias networks in high-impedance analog stages |
| Temp Coefficient αVZ | +0.105 %/°C - supports stable reference performance across –65 °C to +175 °C |
| Forward Voltage VF | 1.50 V @ 1.0 A - defines forward conduction loss during polarity-reversal fault conditions |
| Surge Current IZSM | 1.4 A @ 8.3 ms - withstands transient overvoltage events without degradation |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with copper end caps finished in Sn/Pb, cathode indicated by band, weight 539 mg, tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node; conducts up to 1.0 A with ≤1.5 V drop |
| Cathode | Reverse-biased Zener terminal | Marked with band; regulates voltage when biased negatively relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates moisture ingress and internal delamination under thermal cycling and vacuum |
| Category I metallurgical bond | Ensures mechanical integrity and long-term parameter stability in shock/vibration environments |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling and assembly without special static control beyond standard Class 1A protocols |
| Inherent radiation hardness | Validated per MicroNote 050 for total ionizing dose (TID) tolerance in space applications |
| Triple-layer passivation | Prevents surface leakage and parameter drift in high-humidity or contaminated atmospheres |
Applications
| Avionics Power Bus Protection | Satellite Payload Bias Reference |
|---|---|
Use Scenario: Clamping transient spikes on 100–150 V primary bus in flight control electronics. IC Role / Device Role / Timing Role: Two-terminal Zener clamp absorbing surge energy without latch-up or parametric shift. Use Value: Maintains bus integrity during lightning-induced surges up to 1.4 A (8.3 ms), with no parameter drift after 10⁴ cycles. |
Use Scenario: Providing stable 160 V bias for photomultiplier tube (PMT) gain control in Earth observation sensors. IC Role / Device Role / Timing Role: Precision voltage reference operating continuously at –40 °C to +70 °C ambient with <2 μA leakage. Use Value: Enables sub-0.5% gain stability over mission lifetime due to low tempco (+0.105 %/°C) and radiation-hardened structure. |
| Nuclear Instrumentation Signal Conditioning | Missile Guidance System Voltage Monitor |
Use Scenario: Regulating detector bias supply in high-radiation gamma spectroscopy front-ends. IC Role / Device Role / Timing Role: Radiation-tolerant Zener reference maintaining regulation despite >100 krad(Si) exposure. Use Value: Delivers verified TID resilience per MicroNote 050, eliminating need for shielding or derating in reactor monitoring units. |
Use Scenario: Monitoring 160 V launch sequencer power rail for undervoltage/overvoltage faults. IC Role / Device Role / Timing Role: Fail-safe voltage threshold detector using Zener knee conduction as trip signal. Use Value: Provides deterministic 160 V ±5% trip point with <10 ns response to overvoltage, meeting MIL-STD-883 Class B timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4987CUS/TR | Same electrical specs; qualified to JANTXV level (higher screening, tighter lot acceptance testing) | Required for Class H/V systems where burn-in and life test data are mandated | Select JANTXV1N4987CUS/TR when full MIL-PRF-19500/356 JANTXV screening is specified in the design baseline |
| 1N4987CUS/TR | Commercial-grade version; same Zener voltage, tolerance, and package but no military qualification or radiation data | Suitable only for non-mission-critical industrial or test equipment with ambient <85 °C | Choose 1N4987CUS/TR for cost-sensitive prototypes or ground-support equipment where MIL-spec is not required |
Compared with JANS1N4987CUS/TR, JANTXV1N4987CUS/TR adds extended screening for higher reliability assurance without altering electrical behavior, while 1N4987CUS/TR omits military qualification and radiation validation - making it unsuitable for flight or nuclear environments.
Availability
JANS1N4987CUS/TR is available at Aetrix Electronics and suitable for avionics power protection, satellite payload biasing, and nuclear instrumentation requiring stable component supply under extended temperature and radiation stress.
Supply support for JANS1N4987CUS/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) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
JANS1N4987CUS/TR belongs to Microsemi's MIL-PRF-19500/356 qualified Zener diode product line, engineered specifically for voltage regulation in safety-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance for JANS1N4987CUS/TR?
JANS1N4987CUS/TR has a nominal Zener voltage of 160 V with ±5% tolerance, as indicated by the "C" suffix in the part number. This tolerance is guaranteed over the full operating temperature range of –65 °C to +175 °C and applies at the specified test current of 8 mA.
Is JANS1N4987CUS/TR radiation-hardened?
Yes, JANS1N4987CUS/TR is inherently radiation-hardened per Microsemi MicroNote 050, with validated total ionizing dose (TID) tolerance suitable for space and nuclear environments. This characteristic stems from its voidless-glass hermetic construction and Category I metallurgical bonding, not post-fabrication hardening.
What is the maximum continuous Zener current for JANS1N4987CUS/TR?
The maximum continuous Zener current (IZM) for JANS1N4987CUS/TR is 930 mA, calculated from its 5 W power rating and 160 V Zener voltage (P = V × I). This value assumes operation at TEC = 140 °C; derating is required linearly above that temperature to zero at 175 °C.
Does JANS1N4987CUS/TR have ESD protection built-in?
JANS1N4987CUS/TR is nonsensitive to ESD per MIL-STD-750 Method 1020, meaning it does not require special ESD handling beyond standard Class 1A protocols. Its triple-layer passivation and hermetic seal contribute to intrinsic robustness against electrostatic discharge events.
What package type is used for JANS1N4987CUS/TR?
JANS1N4987CUS/TR uses the "E" package (also known as D-5B), a surface-mount hermetically sealed voidless glass case with tungsten slugs and copper end caps finished in Sn/Pb. Cathode polarity is marked by a visible band on the glass body.
JANS1N4987CUS/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
JANS1N4987CUS/TR FAQ
1.How can I place an order for JANS1N4987CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4987CUS/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 JANS1N4987CUS/TR reliable?
The price and inventory of JANS1N4987CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4987CUS/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4987CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4987CUS/TR transactions.
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4.How is shipping managed for JANS1N4987CUS/TR?
JANS1N4987CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4987CUS/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 JANS1N4987CUS/TR?
For technical support, including JANS1N4987CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4987CUS/TR requirements.
6.How does Aetrix verify that JANS1N4987CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4987CUS/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 JANS1N4987CUS/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4987CUS/TR?
All JANS1N4987CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4987CUS/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 JANS1N4987CUS/TR part is unused and in its original packaging.
Return procedure for JANS1N4987CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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