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Microchip Technology JANTX1N4968CUS/TR
- Part No.:
- JANTX1N4968CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4968CUS/TR.pdf
- Description:
- DIODE ZENER 27V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:5,076
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Product details
Overview
JANTX1N4968CUS/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 27 V ±2% (C suffix), dynamic impedance of 6.0 Ω at 50 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 power regulation circuits.
For engineers reviewing the JANTX1N4968CUS/TR datasheet, JANTX1N4968CUS/TR pinout, JANTX1N4968CUS/TR application, or JANTX1N4968CUS/TR equivalent, this part is selected for aerospace power supplies, radiation-hardened instrumentation, and MIL-PRF-19500/356-compliant voltage stabilization where voidless-glass construction and Category I metallurgical bonding are mandatory.
Technical Context
This device operates in reverse-biased breakdown mode with tightly controlled Zener voltage regulation across 10–50% of IZM (6.0 mA to 30 mA), exhibiting ΔVZ ≤ 0.5 V over that range. Its thermal resistance is 7 °C/W junction-to-end-cap, enabling stable operation up to 175 °C junction temperature when mounted on thermally optimized PCB pads.
The "C" suffix denotes ±2% voltage tolerance at 25 °C, and the "TR" indicates tape-and-reel packaging per EIA-481-B. Cathode polarity is marked by a band; forward voltage is 1.50 V at 1.0 A, and reverse leakage is limited to 2 μA at 20.6 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 27 V ±2% at IZT = 50 mA - ensures precise clamping in regulated DC rails |
| Power Dissipation | 5 W @ TEC = 140 °C - supports continuous operation in high-temp avionics enclosures |
| Dynamic Impedance ZZ | 6.0 Ω @ IZT = 50 mA - minimizes output voltage variation under load transients |
| Max Reverse Leakage IR | 2 μA @ VR = 20.6 V - guarantees low standby current in battery-backed systems |
| Junction Temperature Range | –65 °C to +175 °C - qualified for extreme-environment deployment without derating |
| Thermal Resistance θJC | 7 °C/W junction-to-end-cap - enables direct thermal coupling to heatsinked PCB copper |
| Surge Current IZSM | 6.0 A @ 8.3 ms - withstands lightning-induced transients in MIL-STD-461E-compliant designs |
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, and EIA-481-B tape-and-reel compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node; carries full surge current during reverse clamp |
| Cathode | Reverse breakdown terminal | Marked by band; connected to regulated rail; defines Zener reference potential |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and internal corrosion in 100% RH, salt fog, or vacuum environments |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycling reliability exceeding 1000 cycles –65 °C/+175 °C |
| Triple-layer passivation | Suppresses surface leakage paths and enhances long-term parameter stability under bias stress |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
| Inherent radiation hardness | Qualified to 100 krad(Si) total ionizing dose per MicroNote 050 - no shielding required |
Applications
| Aerospace Power Conditioning | Tactical Radios & EW Systems |
|---|---|
Use Scenario: Regulating 28 V DC bus in satellite payload power distribution units. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream FPGAs and ADCs. Use Value: Maintains ±2% regulation across –55 °C to +125 °C ambient while surviving launch vibration and space radiation. |
Use Scenario: Providing stable bias voltage for GaN PA stages in manpack electronic warfare transceivers. IC Role / Device Role / Timing Role: Precision shunt regulator establishing clean 27 V gate bias rail independent of input ripple. Use Value: 6.0 Ω dynamic impedance suppresses RF modulation sidebands caused by supply noise coupling into PA bias. |
| MIL-STD-1275 Vehicle Power Interfaces | Nuclear Instrumentation Channels |
Use Scenario: Clamping transient spikes on 24 V vehicle electrical systems during load dump events. IC Role / Device Role / Timing Role: Primary overvoltage protection element absorbing 6.0 A surge currents per MIL-STD-1275B. Use Value: Survives repeated 8.3 ms surges without parameter drift due to voidless-glass thermal robustness. |
Use Scenario: Stabilizing detector bias voltage in neutron flux monitoring channels inside reactor containment. IC Role / Device Role / Timing Role: Radiation-hardened voltage reference ensuring consistent pulse height discrimination thresholds. Use Value: Inherent TID hardness eliminates need for redundant shielding or periodic recalibration in high-dose zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4968CUS/TR | Higher screening level (JANTXV vs JANTX); tighter lot acceptance testing per MIL-PRF-19500/356 | Required for flight-critical subsystems where burn-in and radiation lot acceptance are mandated | Select JANTXV variant only when mission assurance requirements exceed JANTX baseline |
| 1N4968US | Commercial-grade version; no MIL-PRF-19500 qualification; same electrical specs and D-5B package | Suitable for ground-test equipment or non-mission-critical prototypes where cost and lead time are prioritized | Use 1N4968US for development boards or commercial derivatives lacking military environmental requirements |
Compared with JANTX1N4968CUS/TR, the JANTXV variant adds enhanced screening for flight use, while the 1N4968US removes military qualification but retains identical Zener performance and thermal behavior - enabling staged qualification paths from prototype to flight hardware.
Availability
JANTX1N4968CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, tactical radio biasing, and MIL-STD-1275 vehicle interface applications requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTX1N4968CUS/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 and mixed-signal components for defense, aerospace, and industrial markets.
JANTX1N4968CUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356-qualified Zener series, designed specifically for voltage regulation in mission-critical systems where hermetic sealing, radiation tolerance, and extreme temperature operation are non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTX1N4968CUS/TR?
JANTX1N4968CUS/TR has a nominal Zener voltage of 27 V with ±2% tolerance at 25 °C, confirmed by the "C" suffix per Microsemi SD44A datasheet. This tolerance applies across the full operating temperature range of –65 °C to +175 °C, with measured ΔVZ ≤ 0.5 V between 10% and 50% of IZM. The JANTX1N4968CUS/TR maintains this specification under MIL-PRF-19500/356 screening.
Does JANTX1N4968CUS/TR require a heatsink?
JANTX1N4968CUS/TR does not require an external heatsink when mounted on ≥1 in² of 2-oz copper with thermal vias, as its 7 °C/W junction-to-end-cap thermal resistance allows full 5 W dissipation at 140 °C end-cap temperature. The JANTX1N4968CUS/TR's D-5B package relies on PCB copper area for heat spreading - adding a heatsink provides marginal benefit unless ambient exceeds 125 °C.
Is JANTX1N4968CUS/TR radiation hardened?
Yes, JANTX1N4968CUS/TR is inherently radiation hard per Microsemi MicroNote 050, with total ionizing dose (TID) tolerance of ≥100 krad(Si) and no parameter degradation observed after exposure. This radiation hardness stems from the voidless-glass hermetic seal and tungsten slug construction - no additional shielding or derating is needed for JANTX1N4968CUS/TR in nuclear or space applications.
What is the maximum surge current rating for JANTX1N4968CUS/TR?
JANTX1N4968CUS/TR is rated for 6.0 A peak nonrepetitive surge current at 8.3 ms square wave per MIL-STD-750 Method 3013. This value is validated by Figure 1 in the SD44A datasheet and reflects the device's ability to absorb transient energy without parametric shift. The JANTX1N4968CUS/TR sustains this rating across –65 °C to +125 °C ambient when properly soldered to thermally adequate PCB pads.
How is polarity marked on JANTX1N4968CUS/TR?
JANTX1N4968CUS/TR uses a cathode band to indicate polarity - the banded end is the cathode, which must be connected to the higher-potential node in Zener regulation mode. This marking is visible on the voidless-glass body and aligns with JEDEC standard orientation for D-5B packages. The JANTX1N4968CUS/TR has no anode marking; polarity verification is confirmed via diode test with <1.5 V forward bias.
JANTX1N4968CUS/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):
- 27 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 6 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 20.6 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
JANTX1N4968CUS/TR FAQ
1.How can I place an order for JANTX1N4968CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4968CUS/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 JANTX1N4968CUS/TR reliable?
The price and inventory of JANTX1N4968CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4968CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4968CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4968CUS/TR transactions.
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4.How is shipping managed for JANTX1N4968CUS/TR?
JANTX1N4968CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4968CUS/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 JANTX1N4968CUS/TR?
For technical support, including JANTX1N4968CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4968CUS/TR requirements.
6.How does Aetrix verify that JANTX1N4968CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4968CUS/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 JANTX1N4968CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4968CUS/TR?
All JANTX1N4968CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4968CUS/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 JANTX1N4968CUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4968CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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