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Microchip Technology JANTXV1N4981DUS/TR
- Part No.:
- JANTXV1N4981DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4981DUS/TR.pdf
- Description:
- DIODE ZENER 91V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:7,206
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Product details
Overview
JANTXV1N4981DUS/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 dynamic impedance of 90 Ω at IZT - used in high-reliability voltage regulation for avionics power conditioning and radiation-hardened instrumentation.
For engineers reviewing the JANTXV1N4981DUS/TR datasheet, JANTXV1N4981DUS/TR pinout, JANTXV1N4981DUS/TR application, or JANTXV1N4981DUS/TR equivalent, this part requires attention to its voidless-glass package thermal resistance (7 °C/W), -65 °C to +175 °C operating range, and MIL-PRF-19500/356 qualification for mission-critical analog reference and overvoltage clamping.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, delivering stable 91 V regulation across 10–50% of IZM (1.6 A max continuous) with ΔVZ ≤ 7.5 V over that range. Its internal Category I metallurgical bond and triple-layer passivation ensure long-term stability under thermal cycling and radiation exposure.
The JANTXV1N4981DUS/TR exhibits low reverse leakage (≤2 μA at 73 V), forward voltage of 1.5 V at 1.0 A, and surge capability of 1.6 A (8.3 ms square wave). Its voidless-glass construction eliminates moisture ingress paths, supporting operation in vacuum and high-humidity environments without parameter drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 91 V at IZT = 15 mA - defines precise regulation point for reference and clamp circuits |
| Power Dissipation | 5 W @ TEC = 140 °C - sets maximum steady-state thermal load before derating begins |
| Dynamic Impedance ZZ | 90 Ω at IZT - determines output voltage variation under changing load current |
| Max Reverse Leakage IR | 2 μA at VR = 73 V - ensures minimal parasitic current in high-impedance bias networks |
| Operating Temperature | -65 °C to +175 °C - enables deployment in aerospace, downhole, and defense electronics |
| Thermal Resistance θJC | 7 °C/W junction-to-end-cap - informs heatsinking requirements for sustained 5 W operation |
| Surge Current IZSM | 1.6 A (8.3 ms square wave) - supports transient overvoltage suppression without failure |
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 / low-side connection | Connected to circuit ground or lowest potential node during regulation |
| Cathode | Zener breakdown terminal / high-side connection | Connected to unregulated input; voltage referenced to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/356 Qualified (JANTXV) | Meets Level V screening for vibration, shock, temperature cycling, and burn-in - required for flight hardware |
| Voidless Hermetic Glass Construction | Eliminates internal delamination and moisture-induced parameter shift over 20+ year service life |
| Category I Metallurgical Bond | Ensures mechanical integrity of die-to-leadframe interface under extreme thermal gradients |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without parameter degradation - simplifies handling in cleanroom assembly |
| Inherent Radiation Hardness | Specified per MicroNote 050 - retains regulation performance after 100 krad(Si) total ionizing dose |
Applications
| Avionics Power Bus Clamp | Satellite Sensor Reference |
|---|---|
Use Scenario: Clamps transients on 28 V DC aircraft bus during load dump or lightning-induced surges. IC Role / Device Role / Timing Role: Shunt regulator acting as crowbar element to limit bus voltage to ≤91 V. Use Value: Prevents damage to downstream FPGAs and ADCs by absorbing up to 1.6 A surge without parametric shift. |
Use Scenario: Provides stable 91 V bias for photomultiplier tube (PMT) gain control in space-based spectrometers. IC Role / Device Role / Timing Role: Precision voltage reference source for high-voltage multiplier chain. Use Value: Maintains <±0.1% regulation over -55 °C to +125 °C due to low αVZ (0.1%/°C) and hermetic stability. |
| Nuclear Instrumentation Supply | Downhole Telemetry Regulator |
Use Scenario: Regulates HV supply for scintillation detector front-end in reactor monitoring systems. IC Role / Device Role / Timing Role: Primary shunt reference in feedback loop of 100 V switching converter. Use Value: Survives 100 krad(Si) TID exposure while retaining ZZ < 100 Ω - critical for calibration traceability. |
Use Scenario: Stabilizes bias voltage for MEMS pressure sensors in oil/gas well logging tools. IC Role / Device Role / Timing Role: High-temperature voltage clamp protecting analog front-end from ESD and cable coupling. Use Value: Operates continuously at +175 °C ambient with no derating loss - enabled by 7 °C/W θJC and glass-seal reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4981US | No TR suffix - bulk packaging instead of tape-and-reel; identical electrical specs and qualification | Preferred for manual prototyping or low-volume hand-soldered assemblies | Select JANTXV1N4981US when automated pick-and-place is not required |
| JANS1N4981US | Higher screening level (Level S per MIL-PRF-19500/356); same VZ, ZZ, and thermal specs | Required for manned spacecraft and nuclear command systems where zero latent defects are mandated | Choose JANS1N4981US only when Level S screening documentation and lot traceability are contractually required |
Compared with JANTXV1N4981DUS/TR, JANTXV1N4981US offers identical performance in non-automated builds, while JANS1N4981US adds full Level S screening for ultra-high-assurance programs - neither is pin-compatible with axial-leaded 1N4981 variants due to differing package geometry and thermal path.
Availability
JANTXV1N4981DUS/TR is available at Aetrix Electronics and suitable for avionics power conditioning, satellite sensor biasing, and nuclear instrumentation requiring stable component supply with full MIL-PRF-19500/356 traceability and extended temperature support.
Supply support for JANTXV1N4981DUS/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 components for aerospace, defense, and industrial markets, with emphasis on radiation-hardened and extended-temperature solutions.
The JANTXV1N4981DUS/TR belongs to Microsemi's legacy 1N49xxUS military Zener series, engineered specifically for voltage regulation in mission-critical systems where hermeticity, thermal robustness, and long-term parametric stability are non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTXV1N4981DUS/TR?
The JANTXV1N4981DUS/TR has a nominal Zener voltage of 91 V with a standard tolerance of ±5%, consistent with MIL-PRF-19500/356 requirements for JANTXV-grade devices. No tighter tolerance suffix (e.g., 'C' or 'D') is applied to this specific part number, confirming the ±5% specification applies across its qualified operating range.
Does JANTXV1N4981DUS/TR require heatsinking in 5 W operation?
Yes - JANTXV1N4981DUS/TR must be mounted to a thermally conductive surface capable of dissipating heat, as its 5 W rating is specified at TEC = 140 °C with θJC = 7 °C/W. Without adequate heatsinking, junction temperature will exceed 175 °C at full power, triggering thermal shutdown or parametric drift.
Is JANTXV1N4981DUS/TR compatible with lead-free reflow processes?
No - JANTXV1N4981DUS/TR features Sn/Pb-finished copper end caps and is qualified for eutectic solder reflow only. Lead-free reflow profiles exceed its thermal limits and risk compromising the voidless glass seal integrity; Microsemi documentation explicitly prohibits Pb-free assembly.
What does the "DUS" suffix indicate in JANTXV1N4981DUS/TR?
The "DUS" suffix in JANTXV1N4981DUS/TR denotes the "E" package (D-5B outline), surface-mount configuration, and voidless-glass hermetic construction. It distinguishes this variant from axial-leaded equivalents (e.g., 1N4981) and confirms compliance with MIL-PRF-19500/356 mechanical and environmental requirements.
Can JANTXV1N4981DUS/TR replace 1N4981 in existing designs?
No - JANTXV1N4981DUS/TR is not a drop-in replacement for through-hole 1N4981 due to fundamental differences in package (surface-mount D-5B vs. axial DO-41), thermal path (end-cap conduction vs. lead conduction), and qualification level (JANTXV vs. commercial). PCB redesign and thermal validation are mandatory.
JANTXV1N4981DUS/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:
- ±1%
- 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
JANTXV1N4981DUS/TR FAQ
1.How can I place an order for JANTXV1N4981DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4981DUS/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 JANTXV1N4981DUS/TR reliable?
The price and inventory of JANTXV1N4981DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4981DUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4981DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4981DUS/TR transactions.
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4.How is shipping managed for JANTXV1N4981DUS/TR?
JANTXV1N4981DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4981DUS/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 JANTXV1N4981DUS/TR?
For technical support, including JANTXV1N4981DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4981DUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4981DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4981DUS/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 JANTXV1N4981DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4981DUS/TR?
All JANTXV1N4981DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4981DUS/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 JANTXV1N4981DUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4981DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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