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Microchip Technology JANTXV1N4981US/TR
- Part No.:
- JANTXV1N4981US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4981US/TR.pdf
- Description:
- DIODE ZENER 91V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,722
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Product details
Overview
JANTXV1N4981US/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 91 V at 15 mA test current, ±5% tolerance, and maximum dynamic impedance of 90 Ω at IZT - used for precision voltage regulation in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTXV1N4981US/TR datasheet, JANTXV1N4981US/TR pinout, JANTXV1N4981US/TR application, or JANTXV1N4981US/TR equivalent, this part delivers verified radiation-hardened performance, -65 °C to +175 °C operating range, voidless-glass construction, and MIL-PRF-19500/356 qualification - critical for avionics power rail stabilization and fault-tolerant reference design.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with regulated output maintained across 10%–50% of IZM (1.6 A) while exhibiting ΔVZ ≤ 7.5 V. Its thermal resistance is 7 °C/W junction-to-end-cap, enabling stable regulation under transient thermal loads up to 175 °C junction temperature.
The "E" package (D-5B) uses tungsten slugs and copper end caps with Sn/Pb finish, supporting solder reflow per MIL-STD-202. Cathode polarity is marked by a band; no marking appears on the body per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 91 V ±5% at IZT = 15 mA - defines nominal regulation point for stable 91 V reference under load |
| Power Dissipation | 5 W @ TEC = 140 °C - sets maximum continuous power handling before thermal derating begins |
| Dynamic Impedance ZZ | 90 Ω @ IZT - determines output voltage variation under changing load current |
| Max Reverse Leakage IR | 2 μA @ VR = 72.8 V - ensures minimal parasitic current in standby or low-power modes |
| Temp Coefficient αVZ | +0.100 %/°C @ IZT - quantifies voltage drift over temperature; positive slope requires compensation in precision references |
| Surge Current IZSM | 1.6 A @ 8.3 ms - supports transient overvoltage clamping without failure during power-up or fault events |
| Operating Temperature | -65 °C to +175 °C - enables deployment in extreme-environment military and space platforms |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with tungsten slugs and copper end caps finished with Sn/Pb. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / cathode-side reference return | Connected to system ground or lower-potential rail in shunt regulator configuration |
| Cathode | Breakdown voltage output terminal | Provides regulated 91 V output when reverse-biased; marked by band on package |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and gas migration, 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 V requirements |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - validated for space-grade applications |
| Triple-layer passivation | Prevents surface leakage paths and enhances long-term reliability in high-humidity or contaminated atmospheres |
Applications
| Aerospace Power Bus Regulation | Avionics Reference Voltage Source |
|---|---|
Use Scenario: Stabilizing 91 V auxiliary bus in satellite power distribution units during solar array transients and battery switching. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining constant 91 V despite input ripple and load step changes. Use Value: Prevents downstream DC-DC converter undervoltage lockout during 8.3 ms surges up to 1.6 A. |
Use Scenario: Providing primary reference for analog-to-digital converters in flight control sensor signal conditioning modules. IC Role / Device Role / Timing Role: Precision voltage reference with <±5% tolerance and +0.1%/°C TC, directly feeding ADC reference inputs. Use Value: Enables 12-bit measurement accuracy over -55 °C to +125 °C operational range without external trimming. |
| Military Radar Bias Supply | High-Reliability Test Equipment Calibration |
Use Scenario: Generating stable bias voltage for GaN RF power amplifier stages in ground-based radar transmitters. IC Role / Device Role / Timing Role: High-voltage Zener clamp protecting amplifier gate drivers from overvoltage during pulse modulation. Use Value: Withstands 175 °C junction temperature and 1000+ thermal cycles without parameter drift. |
Use Scenario: Serving as traceable calibration standard in automated test equipment for high-voltage power supply verification. IC Role / Device Role / Timing Role: Certified reference element with documented MIL-qualified lot traceability and burn-in history. Use Value: Supports ISO/IEC 17025 compliance through full lot-level test data and radiation hardness documentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4980US/TR | 82 V nominal Zener voltage, 15 mA IZT, 80 Ω ZZ - 9 V lower regulation point | Suitable where 82 V rail stabilization is required instead of 91 V; same thermal and environmental specs | Select when system architecture specifies 82 V intermediate bus; identical mounting and qualification |
| JANTXV1N4982US/TR | 100 V nominal Zener voltage, 12 mA IZT, 110 Ω ZZ - 9 V higher regulation point, slightly higher impedance | Used for 100 V reference generation in legacy radar subsystems requiring tighter voltage margin | Choose for 100 V systems needing same hermetic reliability; verify dynamic impedance impact on loop stability |
Compared with JANTXV1N4981US/TR, JANTXV1N4980US/TR provides lower-voltage regulation with marginally better impedance, while JANTXV1N4982US/TR offers higher-voltage capability at the cost of increased ZZ - both retain identical MIL-PRF-19500/356 qualification, thermal rating, and package geometry.
Availability
JANTXV1N4981US/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, avionics reference design, and military radar bias supply requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTXV1N4981US/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, with emphasis on radiation-hardened and MIL-spec components.
The JANTXV1N4981US/TR belongs to Microsemi's military-qualified Zener diode family built for ultra-stable voltage regulation in mission-critical power systems where failure is not an option.
FAQ
What is the Zener voltage tolerance for JANTXV1N4981US/TR?
JANTXV1N4981US/TR has a nominal Zener voltage of 91 V with a standard tolerance of ±5%, as specified in the Microsemi SD44A datasheet. This tolerance applies at 25 °C and IZT = 15 mA, and remains valid across the full -65 °C to +175 °C operating range per MIL-PRF-19500/356 testing.
Does JANTXV1N4981US/TR require heatsinking in 5 W operation?
JANTXV1N4981US/TR achieves its full 5 W rating only at TEC = 140 °C; above that, linear derating applies to zero at 175 °C. Its 7 °C/W junction-to-end-cap thermal resistance means heatsinking is mandatory for sustained 5 W dissipation - PCB copper area or external thermal pads must be designed to maintain end-cap temperature ≤140 °C.
Is JANTXV1N4981US/TR compatible with lead-free reflow processes?
JANTXV1N4981US/TR features Sn/Pb-finished copper end caps and is qualified for solder reflow per MIL-STD-202. It is not lead-free process compatible; use only with Sn63/Pb37 or equivalent eutectic solder profiles. Lead-free reflow exceeds its thermal limits and violates MIL-PRF-19500/356 qualification.
What is the surge current rating for JANTXV1N4981US/TR?
JANTXV1N4981US/TR supports a nonrepetitive peak Zener surge current (IZSM) of 1.6 A for an 8.3 ms half-sine wave, as defined in the SD44A datasheet. This rating enables protection against short-duration transients such as load dump or inductive kickback without degradation.
How is polarity identified on JANTXV1N4981US/TR?
JANTXV1N4981US/TR uses a cathode band for polarity identification, located on the glass body adjacent to the cathode terminal. The anode connects to the opposite end cap. No alphanumeric marking appears on the device per specification - correct orientation relies solely on the band position.
JANTXV1N4981US/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):
- 91 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 69.2 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
JANTXV1N4981US/TR FAQ
1.How can I place an order for JANTXV1N4981US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4981US/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 JANTXV1N4981US/TR reliable?
The price and inventory of JANTXV1N4981US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4981US/TR is usually 5 days.
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Once your JANTXV1N4981US/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 JANTXV1N4981US/TR?
For technical support, including JANTXV1N4981US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4981US/TR requirements.
6.How does Aetrix verify that JANTXV1N4981US/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4981US/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 JANTXV1N4981US/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4981US/TR?
All JANTXV1N4981US/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4981US/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 JANTXV1N4981US/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4981US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4981US/TR Tags
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