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Microchip Technology JANS1N4961CUS/TR
- Part No.:
- JANS1N4961CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANS1N4961CUS/TR.pdf
- Description:
- DIODE ZENER 13V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,890
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Product details
Overview
JANS1N4961CUS/TR from Microsemi is a hermetically sealed, voidless-glass surface-mount 5 W Zener diode with nominal Zener voltage of 13 V, ±1% tolerance (C suffix), and maximum power dissipation of 5 W at 140 °C end-cap temperature. It features 365 mA maximum continuous Zener current (IZM), 3.0 Ω dynamic impedance at 100 mA test current, and operates across –65 °C to +175 °C junction temperature range. Used in high-reliability voltage regulation for aerospace power conditioning circuits.
For engineers reviewing the JANS1N4961CUS/TR datasheet, JANS1N4961CUS/TR pinout, JANS1N4961CUS/TR application, or JANS1N4961CUS/TR equivalent, key selection criteria include military-grade hermeticity, tight 1% voltage tolerance, 5 W surface-mount power handling, radiation-hardened construction per MicroNote 050, and compatibility with MIL-PRF-19500/356 Class S (JANS) qualification.
Technical Context
This device belongs to Microsemi's JANS-qualified 1N4954US–1N4996US series, employing voidless-glass hermetic sealing with internal Category I metallurgical bonds and triple-layer passivation. Its Zener breakdown mechanism delivers stable regulation over wide current (10%–50% IZM) and temperature ranges, with voltage change ΔVZ ≤ 0.9 V under specified load variation.
The "E" package (D-5B) uses tungsten slugs and copper end caps with Sn/Pb finish, enabling robust thermal conduction (7 °C/W junction-to-end-cap) and ESD immunity per MIL-STD-750 Method 1020. Polarity is marked by cathode band; no surface marking on device body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13 V ±1% at 100 mA test current - ensures precise reference stability for critical analog monitoring. |
| Power Dissipation | 5 W @ TEC = 140 °C - supports high-power regulation without derating in compact surface-mount layouts. |
| Dynamic Impedance (ZZ) | 3.0 Ω @ IZT = 100 mA - minimizes output voltage variation under dynamic load transients. |
| Max Continuous Current (IZM) | 365 mA - defines safe DC operating limit for sustained regulation in primary power rails. |
| Operating Temperature | –65 °C to +175 °C - enables deployment in extreme-environment avionics and downhole electronics. |
| Reverse Leakage (IR) | 10 μA @ VR = 9.9 V - guarantees low standby power loss in battery-backed systems. |
| Thermal Resistance | 7 °C/W junction-to-end-cap - allows direct thermal path to PCB copper or heatsink for thermal management. |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (D-5B), with tungsten slugs and copper end caps finished in Sn/Pb. Cathode indicated by band; no part marking on body. 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; must be routed with adequate current-carrying trace width for 365 mA DC. |
| Cathode | Zener breakdown terminal | Marked by band; connects to regulated voltage rail; requires thermal pad connection for 5 W dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal voids-ensures long-term reliability in vacuum and high-humidity environments. |
| Category I metallurgical bond | Provides mechanical integrity and thermal continuity between silicon die and tungsten slug under thermal cycling stress. |
| Triple-layer passivation | Protects junction surface from contamination and ion migration-critical for >10-year mission life in space applications. |
| JANS qualification per MIL-PRF-19500/356 | Validated screening includes burn-in, temperature cycling, and lot acceptance testing-meets Class S requirements. |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050-no additional shielding required for LEO missions. |
Applications
| Aerospace Power Conditioning | Downhole Instrumentation |
|---|---|
Use Scenario: Regulating auxiliary 13 V supply in satellite power distribution units exposed to thermal cycling and radiation. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp in unregulated DC-DC converter feedback paths. Use Value: Maintains ±1% output accuracy across –65 °C to +175 °C while surviving 100 krad(Si) TID exposure. |
Use Scenario: Stabilizing sensor bias voltage in oil/gas well logging tools operating at 175 °C ambient. IC Role / Device Role / Timing Role: Primary voltage regulator for MEMS pressure transducers and analog front-ends. Use Value: Delivers 5 W regulation without derating at 140 °C end-cap temperature, eliminating need for active cooling. |
| Military Avionics Monitoring | Nuclear Facility Control Systems |
Use Scenario: Providing fault-tolerant reference for engine control unit (ECU) voltage supervisors in fighter jet ECUs. IC Role / Device Role / Timing Role: Redundant Zener clamp in dual-channel power monitor IC inputs. Use Value: Hermetic seal prevents latent failure modes from humidity-induced corrosion during 20+ year service life. |
Use Scenario: Biasing radiation detector preamplifiers in reactor containment zones with intermittent cooling. IC Role / Device Role / Timing Role: Low-noise, low-leakage (10 μA) voltage reference for charge-integration circuits. Use Value: Sub-μA leakage drift over time ensures stable gain calibration without recalibration cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4961CUS/TR | Same electrical specs; qualified to MIL-PRF-19500/356 Class V (higher screening level including 100% thermal shock). | Required for flight-critical subsystems where extended environmental stress screening is mandated. | Select when full Class V screening and 100% thermal shock testing are contractually required. |
| 1N4961CUS/TR | Commercial-grade version; identical Zener parameters but not MIL-qualified; no radiation hardness documentation. | Suitable only for non-safety-critical industrial controls with benign thermal profiles. | Choose only for cost-sensitive ground-based prototypes lacking radiation or extended temperature requirements. |
Compared with JANS1N4961CUS/TR, JANTXV1N4961CUS/TR adds thermal shock screening and tighter lot traceability for flight hardware, while 1N4961CUS/TR omits MIL-qualification entirely-making JANS1N4961CUS/TR the minimum viable choice for Class S space and defense programs requiring verified radiation tolerance and hermetic reliability.
Availability
JANS1N4961CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, downhole instrumentation, military avionics monitoring, nuclear facility control systems, and high-reliability industrial backup supplies requiring stable component supply across extended temperature and radiation environments.
Supply support for JANS1N4961CUS/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, with emphasis on radiation-hardened and hermetically sealed components.
JANS1N4961CUS/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems where failure is not an option-especially in space, aviation, and nuclear infrastructure.
FAQ
What is the Zener voltage tolerance of JANS1N4961CUS/TR?
JANS1N4961CUS/TR has a nominal Zener voltage of 13 V with ±1% tolerance, indicated by the "C" suffix per Microsemi's standard coding. This tolerance is guaranteed over the full operating temperature range of –65 °C to +175 °C and applies at the specified test current of 100 mA. The tight tolerance supports precision regulation in feedback loops where voltage drift must remain below 130 mV.
Is JANS1N4961CUS/TR radiation-hardened?
Yes, JANS1N4961CUS/TR is inherently radiation-hardened per Microsemi MicroNote 050, with documented tolerance to total ionizing dose (TID) relevant for low-Earth orbit (LEO) missions. Its voidless-glass hermetic construction and silicon process contribute to this hardness-no additional shielding or derating is required for typical space radiation environments up to 100 krad(Si).
What does the "JANS" prefix signify for JANS1N4961CUS/TR?
The "JANS" prefix denotes compliance with MIL-PRF-19500/356 Class S qualification-covering rigorous screening including lot acceptance tests, burn-in, and temperature cycling. JANS1N4961CUS/TR is intended for spaceflight and strategic defense systems where zero-defect reliability is mandatory, distinguishing it from commercial (1N4961CUS/TR) or less-stringent military grades (JANTX, JANTXV).
What is the thermal resistance of JANS1N4961CUS/TR?
JANS1N4961CUS/TR has a junction-to-end-cap thermal resistance of 7 °C/W, measured under standard mounting conditions. This value enables direct thermal transfer from the die to the PCB copper or external heatsink via the end-cap terminals. For reliable 5 W operation, the end-cap temperature must be maintained at or below 140 °C, requiring appropriate board-level thermal design.
Does JANS1N4961CUS/TR have a cathode band marking?
Yes, JANS1N4961CUS/TR uses a visible cathode band to indicate polarity, consistent with JEDEC-standard Zener diode marking. The band is located on the glass body adjacent to the cathode end cap. No alphanumeric part marking appears on the device body itself-identification relies solely on packaging labels and reel markings per EIA-481-B tape-and-reel standards.
JANS1N4961CUS/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):
- 13 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 9.9 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
JANS1N4961CUS/TR FAQ
1.How can I place an order for JANS1N4961CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4961CUS/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 JANS1N4961CUS/TR reliable?
The price and inventory of JANS1N4961CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4961CUS/TR is usually 5 days.
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JANS1N4961CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4961CUS/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 JANS1N4961CUS/TR?
For technical support, including JANS1N4961CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4961CUS/TR requirements.
6.How does Aetrix verify that JANS1N4961CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4961CUS/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 JANS1N4961CUS/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4961CUS/TR?
All JANS1N4961CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4961CUS/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 JANS1N4961CUS/TR part is unused and in its original packaging.
Return procedure for JANS1N4961CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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