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Microchip Technology JANTXV1N4981CUS/TR
- Part No.:
- JANTXV1N4981CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4981CUS/TR.pdf
- Description:
- DIODE ZENER 91V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:3,268
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Product details
Overview
JANTXV1N4981CUS/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 a nominal Zener voltage of 91 V ±1% (C suffix), dynamic impedance of 90 Ω at 15 mA test current, and operating junction temperature range of –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 JANTXV1N4981CUS/TR datasheet, JANTXV1N4981CUS/TR pinout, JANTXV1N4981CUS/TR application, or JANTXV1N4981CUS/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-biased Zener breakdown mode, delivering stable regulation across 10%–50% of IZM (15 mA) with ΔVZ ≤ 7.5 V. Its low thermal resistance (7 °C/W junction-to-end-cap) and robust voidless-glass construction enable reliable operation under extreme thermal cycling and mechanical stress.
The JANTXV1N4981CUS/TR exhibits a temperature coefficient of +0.100 %/°C at IZT, indicating positive VZ drift with temperature - critical for biasing stability in wide-temperature-range analog references. Its surge capability supports 1.6 A non-repetitive 8.3 ms square-wave pulses per MIL-STD-750 Test Method 2072.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±1% at 15 mA - enables precise 91 V rail clamping or reference generation with tight tolerance |
| Power Dissipation | 5 W @ TEC = 140 °C - requires heatsinking or board copper area for sustained full-power operation |
| Dynamic Impedance (ZZ) | 90 Ω @ IZT = 15 mA - limits regulation error under load transients; lower than 1N4980US (80 Ω) |
| Max Reverse Leakage (IR) | 2 μA @ VR = 73 V - ensures minimal standby current in high-impedance bias networks |
| Temp Coefficient (αVZ) | +0.100 %/°C @ IZT - predictable positive drift aids temperature-compensated reference design |
| Surge Current (IZSM) | 1.6 A @ 8.3 ms - withstands lightning-induced or switching transient surges without degradation |
| Forward Voltage (VF) | 1.50 V @ 1.0 A - defines forward conduction loss during fault conditions or polarity protection |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs ("E" or "D-5B" outline); cathode indicated by band; end caps are copper with Sn/Pb finish; weight 539 mg; tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in Zener regulator configuration | Connected to ground or lowest potential node; must handle full surge current path |
| Cathode | High-side connection; voltage reference output node | Provides regulated 91 V output; marked by band; requires clean layout to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal delamination risk under thermal shock or long-term storage - critical for 20+ year space missions |
| Category I metallurgical bond | Guarantees interfacial integrity between silicon die and tungsten slug under >100,000 g mechanical shock |
| Radiation hardness | Qualified per Microsemi MicroNote 050 - survives ≥100 krad(Si) total ionizing dose without parameter shift |
| ESD immunity | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 - no external protection needed in handling or assembly |
| Triple-layer passivation | Prevents moisture ingress and surface leakage paths in high-humidity or salt-fog environments |
Applications
| Aerospace Power Bus Protection | Satellite Voltage Reference |
|---|---|
|
Use Scenario: Clamping transient overvoltages on 100 V primary bus in LEO satellite power distribution units. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector, triggered above 91 V threshold. Use Value: Prevents downstream DC-DC converter failure during solar array arc events; validated for 10⁵ surge cycles. |
Use Scenario: Providing stable 91 V reference for radiation-tolerant ADC biasing in star tracker electronics. IC Role / Device Role / Timing Role: Precision voltage reference source with <±0.1% long-term drift over mission lifetime. Use Value: Enables sub-0.5% measurement accuracy in inertial navigation systems despite thermal vacuum cycling. |
| Military Avionics Bias Network | Nuclear Instrumentation Supply |
|
Use Scenario: Generating stable bias voltages for high-speed op-amps in radar receiver front-ends operating from –55 °C to +125 °C. IC Role / Device Role / Timing Role: Temperature-stable Zener reference in discrete bias generator circuit. Use Value: Maintains <±2% regulation across full military temperature range due to predictable +0.100%/°C αVZ. |
Use Scenario: Regulating detector bias supply in reactor control rod monitoring systems requiring fail-safe operation. IC Role / Device Role / Timing Role: Primary overvoltage limiter protecting Geiger-Müller tube high-voltage supply. Use Value: Hermetic seal prevents outgassing-induced arcing in sealed neutron detection chambers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4981US/TR | Same 91 V rating but ±5% tolerance (no C suffix); higher ZZ = 90 Ω vs. 90 Ω (identical), same IZT = 15 mA | Lacks tight 1% tolerance - unsuitable for precision reference use where <±0.5% drift budget exists | Select JANTXV1N4981CUS/TR when absolute voltage accuracy and long-term stability dominate cost or availability concerns. |
| JANS1N4981CUS/TR | Identical electrical specs and package; qualified to JANS level (higher screening: burn-in, lot acceptance test, radiation assay) | Required for nuclear-hardened systems or DoD programs mandating JANS-level traceability and radiation data | Choose JANS1N4981CUS/TR only if program spec explicitly requires JANS qualification - adds cost and lead time. |
Compared with JANTXV1N4981US/TR, the JANTXV1N4981CUS/TR delivers tighter initial tolerance for improved system calibration yield; versus JANS1N4981CUS/TR, it offers identical performance at lower cost and shorter lead time for non-nuclear applications.
Availability
JANTXV1N4981CUS/TR is available at Aetrix Electronics and suitable for aerospace power bus protection, satellite voltage reference, and military avionics bias network applications requiring stable component supply under extended temperature and radiation exposure.
Supply support for JANTXV1N4981CUS/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.
The JANTXV1N4981CUS/TR belongs to Microsemi's military-qualified Zener diode family built for fail-operational systems where hermeticity, radiation tolerance, and thermal survivability are mandatory.
FAQ
What is the Zener voltage tolerance of JANTXV1N4981CUS/TR?
The JANTXV1N4981CUS/TR has a nominal Zener voltage of 91 V with ±1% tolerance, indicated by the "C" suffix in the part number. This tighter tolerance is achieved through post-package screening and is verified per MIL-PRF-19500/356 requirements. The JANTXV1N4981CUS/TR maintains this specification across its full operating temperature range of –65 °C to +175 °C.
Is JANTXV1N4981CUS/TR compatible with lead-free solder reflow profiles?
The JANTXV1N4981CUS/TR features tin/lead (Sn/Pb) finished end caps per the datasheet, and is not qualified for standard lead-free reflow (260 °C peak). Using lead-free processes may compromise the hermetic seal integrity or metallurgical bond. For RoHS-compliant designs, consult Microchip's qualified lead-free alternatives or request special Pb-free processing documentation for JANTXV1N4981CUS/TR.
What is the maximum continuous Zener current for JANTXV1N4981CUS/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4981CUS/TR is 15 mA at an end-cap temperature (TEC) of 140 °C. This corresponds to the 5 W power rating: P = VZ × IZM = 91 V × 0.015 A = 1.365 W - well below 5 W because derating begins at TEC > 140 °C. Full 5 W dissipation requires active heatsinking or forced cooling.
Does JANTXV1N4981CUS/TR require external current limiting?
Yes, JANTXV1N4981CUS/TR requires an external series current-limiting resistor or constant-current source to prevent thermal runaway. Its 91 V Zener voltage and 5 W rating imply a minimum series resistance of 6.07 kΩ for safe operation from a 100 V supply at 15 mA. Without proper current limiting, exceeding IZM even briefly can cause irreversible parametric shift or catastrophic failure.
How does the temperature coefficient affect JANTXV1N4981CUS/TR in precision reference designs?
The JANTXV1N4981CUS/TR has a temperature coefficient of +0.100 %/°C, meaning its Zener voltage increases by ~0.091 V per °C rise. In precision reference designs, this drift must be compensated - either via complementary negative-TC components or software calibration. Unlike lower-voltage Zeners with near-zero αVZ, the JANTXV1N4981CUS/TR's predictable positive slope allows deterministic correction in closed-loop systems.
JANTXV1N4981CUS/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:
- ±2%
- 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
JANTXV1N4981CUS/TR FAQ
1.How can I place an order for JANTXV1N4981CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4981CUS/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 JANTXV1N4981CUS/TR reliable?
The price and inventory of JANTXV1N4981CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4981CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4981CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4981CUS/TR transactions.
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4.How is shipping managed for JANTXV1N4981CUS/TR?
JANTXV1N4981CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4981CUS/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 JANTXV1N4981CUS/TR?
For technical support, including JANTXV1N4981CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4981CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4981CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4981CUS/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 JANTXV1N4981CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4981CUS/TR?
All JANTXV1N4981CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4981CUS/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 JANTXV1N4981CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4981CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4981CUS/TR Tags
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