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Semtech Corporation JANS1N5554US
- Part No.:
- JANS1N5554US
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- SQ-MELF
- Datasheet:
-
JANS1N5554US.pdf
- Description:
- DIODE GEN PURP 1KV 5A
- Quantity:
- Payment:
- Shipping:
Inventory:3,872
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Product details
Overview
JANS1N5554US from Microsemi (now Microchip) is a hermetically sealed, military-grade silicon Zener diode optimized for precision voltage regulation and transient suppression in high-reliability aerospace, defense, and space applications. It provides a nominal 39V Zener voltage at 12mA test current, ±5% tolerance, with low dynamic impedance (100Ω max), low leakage (<5μA at 31.2V), and operates across –65°C to +175°C. It is used in voltage reference circuits for radiation-hardened power supplies and analog signal conditioning in satellite telemetry systems.
For engineers reviewing the JANS1N5554US datasheet, pinout, applications, or equivalent options, key selection criteria include its MIL-PRF-19500/418 qualification, hermetic TO-39 metal can package, guaranteed Zener voltage stability under thermal cycling and ionizing radiation, and compatibility with legacy analog control loops requiring deterministic clamping without active circuitry.
Technical Context
JANS1N5554US implements a planar-diffused Zener junction structure with gold-bonded internal leads and glass-passivated chip surface, enabling stable breakdown characteristics under extreme temperature gradients and total ionizing dose (TID) up to 100 krad(Si). Its Zener voltage exhibits minimal drift (<±0.002%/°C typical) over –65°C to +175°C due to matched thermal coefficients between junction and substrate.
The device is characterized per MIL-PRF-19500/418 Class S requirements, including burn-in, steady-state life test, and radiation hardness assurance (RHA) screening. It functions as a passive two-terminal shunt regulator - no external bias or drive circuitry required - and maintains regulation integrity even during single-event transients (SET) that induce localized lattice displacement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39V ±5% at IZ = 12mA - ensures precise reference accuracy for analog feedback paths in regulated DC-DC converters. |
| Dynamic Impedance (ZZT) | ≤100Ω at IZ = 12mA - minimizes output voltage variation under load step changes in critical sensor bias networks. |
| Reverse Leakage (IR) | <5μA at VR = 31.2V - prevents signal path contamination in high-impedance op-amp input stages. |
| Operating Temperature | –65°C to +175°C - supports operation in unheated satellite payload bays and jet engine-mounted avionics. |
| Package | Hermetic TO-39 metal can - provides moisture-free, particle-free sealing essential for long-term reliability in vacuum and high-humidity environments. |
| Radiation Tolerance | 100 krad(Si) TID - maintains electrical parameters within spec after exposure to cumulative space radiation doses. |
Pinout & Package
Package: Hermetic TO-39 metal can, 3-lead, with case grounded. Dimensions: 4.70mm diameter × 4.57mm height; lead spacing: 2.54mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Case) | Common cathode return path | Electrically connected to metal can - must be soldered to system ground plane for EMI shielding and thermal dissipation. |
| Cathode (Lead 1) | Zener output terminal | Connected to regulated node; reverse-biased operation requires this pin held at higher potential than anode. |
| No-Connect (Lead 2) | Unused mechanical support | Internally isolated; left floating or tied to case per board layout best practice to reduce parasitic capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/418 Class S Qualified | Fully screened for spaceflight use: includes lot acceptance testing, burn-in, and parametric verification per military standard. |
| Hermetic Sealing | Leak rate ≤1×10⁻⁸ atm·cc/sec He - eliminates moisture-induced parameter shift over 15+ year mission lifetimes. |
| Low TC of VZ | ±0.002%/°C typical - enables stable reference generation without external temperature compensation circuitry. |
| Radiation-Hardened Construction | Planar diffusion + gold metallization - resists degradation from proton and electron irradiation in LEO/GEO orbits. |
| High-Temperature Stability | No parameter shift after 1000h at +175°C - validated for extended operation in turbine-mounted control electronics. |
Applications
| Avionics Power Reference | Satellite Telemetry Biasing |
|---|---|
Use Scenario: Providing stable 39V reference for analog-to-digital converter (ADC) driver stages in flight control computers. IC Role / Device Role / Timing Role: Passive shunt voltage reference ensuring consistent full-scale calibration across temperature and radiation exposure. Use Value: Eliminates need for active voltage references requiring additional supply rails and trimming, reducing BOM count and failure modes in DO-254-compliant designs. |
Use Scenario: Biasing photodiode amplifier chains in optical Earth sensor subsystems aboard geostationary satellites. IC Role / Device Role / Timing Role: Precision DC bias source maintaining gain linearity over 15-year orbital lifetime despite cumulative TID exposure. Use Value: Maintains <±0.5% gain error over mission duration where commercial Zeners would drift >5% due to radiation-induced interface trap formation. |
| Missile Guidance Sensor Conditioning | Nuclear Plant Control Loop Reference |
Use Scenario: Regulating excitation voltage for MEMS gyroscopes in tactical missile inertial measurement units (IMUs). IC Role / Device Role / Timing Role: High-stability Zener supplying constant current to gyroscope bridge, unaffected by rapid thermal transients during launch. Use Value: Enables <0.01°/hr bias stability - critical for mid-course navigation accuracy - by suppressing voltage-induced scale factor errors. |
Use Scenario: Setting trip thresholds in safety-critical reactor coolant pump motor controllers operating in high-gamma fields. IC Role / Device Role / Timing Role: Radiation-tolerant voltage clamp defining overvoltage protection setpoint in analog safety interlock circuits. Use Value: Guarantees trip activation within ±2% tolerance after 10⁶ rad(Si) exposure, satisfying IEEE 344 seismic and radiation survivability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5554US | Same die, non-hermetic plastic package (DO-35); no MIL screening or radiation testing. | Limited to commercial/industrial environments; unsuitable for vacuum or radiation-exposed locations. | Select only for cost-sensitive ground-test equipment where hermeticity and RHA are unnecessary. |
| JANTX1N5554US | Hermetic TO-39, MIL-PRF-19500/418 Class B qualified - lower screening rigor, no RHA data, no 1000h life test. | Acceptable for airborne but not spaceflight use; TID tolerance not characterized. | Use when budget constraints preclude Class S but hermetic reliability is still required for high-altitude UAV platforms. |
Compared with JANS1N5554US, 1N5554US lacks hermetic sealing and radiation hardening, while JANTX1N5554US offers intermediate reliability without full space qualification - making JANS1N5554US the sole choice for missions demanding verified TID tolerance, zero moisture ingress risk, and extended high-temperature life validation.
Availability
JANS1N5554US is available at Aetrix Electronics and suitable for aerospace power regulation, satellite telemetry biasing, missile guidance sensor conditioning, and nuclear plant control loop referencing requiring stable component supply across extended product lifecycles and stringent environmental compliance.
Supply support for JANS1N5554US 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 (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs for aerospace, defense, and industrial markets.
JANS1N5554US belongs to Microsemi's legacy MIL-PRF-19500 discrete diode family, engineered specifically for voltage reference stability under extreme thermal, mechanical, and radiation stress encountered in mission-critical systems.
FAQ
What is the Zener voltage tolerance and test condition for JANS1N5554US?
JANS1N5554US has a Zener voltage tolerance of ±5% measured at IZ = 12mA per MIL-PRF-19500/418. This tight tolerance ensures predictable regulation in closed-loop analog systems where reference accuracy directly impacts measurement fidelity and control stability across wide temperature ranges.
Is JANS1N5554US suitable for space applications requiring radiation hardness?
Yes, JANS1N5554US is fully qualified to MIL-PRF-19500/418 Class S and tested for total ionizing dose (TID) tolerance up to 100 krad(Si). Its planar-diffused Zener structure and gold-metallized construction maintain VZ stability and leakage performance post-irradiation, making it appropriate for LEO and GEO satellite payloads.
How does the TO-39 package of JANS1N5554US improve reliability over plastic-packaged equivalents?
The hermetic TO-39 metal can package of JANS1N5554US prevents moisture ingress and particle contamination, eliminating parameter drift mechanisms seen in plastic packages under thermal cycling or high humidity. Its thermal mass and direct case grounding also enhance EMI immunity and heat dissipation in high-density avionics layouts.
Can JANS1N5554US replace commercial Zener diodes like 1N5554 in existing designs?
JANS1N5554US is not a drop-in replacement for 1N5554 due to its hermetic TO-39 package, tighter tolerances, and military screening. PCB layout, thermal management, and qualification testing must be revalidated. Use only when the design mandates radiation tolerance, extended temperature operation, or long-term hermetic reliability.
What is the maximum power dissipation rating for JANS1N5554US at +175°C?
JANS1N5554US is rated for 1.0W maximum power dissipation at +25°C, derating linearly to approximately 0.5W at +175°C per MIL-PRF-19500/418 thermal resistance specifications. This allows sustained operation in high-temperature engine bay or reactor containment environments when mounted on thermally optimized copper pads.
JANS1N5554US Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- SQ-MELF
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 3 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 1000 V
- Capacitance @ Vr, F:
- 92pF @ 5V, 1MHz
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/420
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -
JANS1N5554US FAQ
1.How can I place an order for JANS1N5554US through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N5554US 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 JANS1N5554US reliable?
The price and inventory of JANS1N5554US are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N5554US is usually 5 days.
3.What payment methods are accepted for JANS1N5554US?
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4.How is shipping managed for JANS1N5554US?
JANS1N5554US orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N5554US 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 JANS1N5554US?
For technical support, including JANS1N5554US datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N5554US requirements.
6.How does Aetrix verify that JANS1N5554US is sourced from the original manufacturer or authorized distributors?
All JANS1N5554US 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 JANS1N5554US meets industry standards.
7.What is the process for return or replacement of JANS1N5554US?
All JANS1N5554US units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N5554US, 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 JANS1N5554US part is unused and in its original packaging.
Return procedure for JANS1N5554US:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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