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Microchip Technology JANS1N6317US
- Part No.:
- JANS1N6317US
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, B
- Datasheet:
-
JANS1N6317US.pdf
- Description:
- DIODE ZENER 5.1V 500MW SQ-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:65
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Product details
Overview
JANS1N6317US from Microsemi is a military-qualified, voidless hermetically sealed glass Zener diode with nominal 5.1 V regulation at 20 mA, ±5% tolerance, 0.5 W power rating, and 14 Ω dynamic impedance at IZT - designed for voltage reference and regulation in radiation-hardened, high-reliability aerospace and defense systems.
For engineers reviewing the JANS1N6317US datasheet, JANS1N6317US pinout, JANS1N6317US application, or JANS1N6317US equivalent, this part delivers MIL-PRF-19500/533 qualified performance with verified thermal resistance (RθJEC = 35 °C/W), low temperature coefficient (–0.020 to +0.035 %/°C), and ESD immunity per MIL-STD-750 Method 1020.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with specified test current IZT = 20 mA and knee current IZK = 250 µA. Its internal metallurgical bond (Category I) ensures mechanical robustness and long-term stability under thermal cycling and vibration stress.
The JANS1N6317US uses a B-SQ MELF glass package with copper end caps and Sn/Pb finish, rated for junction temperatures from –65 °C to +175 °C. Its 14 Ω dynamic impedance at IZT and 83 Ω at IZK enable stable regulation across load and temperature variations in critical analog monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V nominal at 20 mA - defines precise regulation point for feedback loops and reference generation |
| Power Dissipation (PD) | 0.5 W at TEC = 150 °C - supports continuous operation in compact, conduction-cooled modules |
| Dynamic Impedance (ZZT) | 14 Ω at IZT = 20 mA - ensures minimal output voltage variation under dynamic load transients |
| Temp. Coefficient (αVZ) | –0.020 to +0.035 %/°C - enables stable reference over wide ambient ranges without external compensation |
| Max. Reverse Current (IR1) | 5 µA at VR = 1.0 V - guarantees low leakage in high-impedance bias networks |
| Junction Temp. Range | –65 to +175 °C - validated for operation in space-grade and jet-engine-mounted electronics |
| Thermal Resistance (RθJEC) | 35 °C/W - allows direct thermal coupling to metal chassis or heat-spreading substrates |
Pinout & Package
Hermetically sealed B-SQ MELF glass package with axial symmetry and cathode band marking; no discrete pins - terminals are metallized copper end caps for surface-mount reflow or conductive epoxy attachment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap | Reverse-bias anode connection | Marked by black band; connects to regulated output node in shunt configuration |
| Anode End Cap | Reverse-bias cathode connection | Connects to system ground or lower-potential rail; carries full Zener current |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and outgassing in vacuum or high-humidity environments |
| Category I metallurgical bond | Validated for >10⁶ thermal cycles between –65 °C and +175 °C without bond degradation |
| MIL-PRF-19500/533 JANS qualification | Full screening including burn-in, temperature cycling, and lot acceptance testing per military standard |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - suitable for LEO and GEO missions |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external protection in handling and assembly |
Applications
| Avionics Power Monitoring | Satellite Onboard Computer Reference |
|---|---|
Use Scenario: Real-time voltage supervision of 5 V DC-DC converter outputs in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.1 V threshold for comparator-based fault detection. Use Value: Enables <1% trip-point drift over –55 °C to +125 °C operating range without calibration. |
Use Scenario: Precision biasing of ADC input stages in radiation-exposed telemetry subsystems. IC Role / Device Role / Timing Role: Low-noise, radiation-hardened voltage reference for 12-bit analog-to-digital conversion. Use Value: Delivers 0.40 VZ(reg) regulation error and <1 µV/√Hz noise density to maintain ENOB ≥ 11.2 bits. |
| Tactical Radio RF Front-End Biasing | Nuclear Instrumentation Signal Conditioning |
Use Scenario: Stable gate bias for GaN HEMT amplifiers in S-band manpack radios exposed to shock and vibration. IC Role / Device Role / Timing Role: Regulated 5.1 V source for amplifier bias networks requiring low thermal drift. Use Value: Maintains <±0.5% bias voltage shift across –40 °C to +85 °C with zero derating up to 150 °C end-cap temp. |
Use Scenario: High-stability reference in neutron detector pulse-height analyzers deployed in reactor containment zones. IC Role / Device Role / Timing Role: Primary voltage reference for charge-integration amplifiers operating under gamma irradiation. Use Value: Provides verified TID tolerance and <5 µA IR1 leakage to prevent signal baseline drift during multi-year deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N6317US | Same electrical specs but JANTXV reliability level (lower screening rigor than JANS); RθJEC = 35 °C/W unchanged | Approved for non-spaceflight military platforms where full JANS screening is not mandated | Select when cost sensitivity outweighs requirement for full space-qualified screening |
| 1N6317US (commercial) | Identical Zener voltage and package, but unqualified per MIL-PRF-19500; RoHS-compliant tin finish available | Suitable for prototyping, ground-test equipment, or commercial avionics with relaxed reliability requirements | Choose only for non-mission-critical development or cost-driven volume production |
Compared with JANS1N6317US, JANTXV1N6317US offers identical regulation performance with reduced test coverage, while 1N6317US omits military screening entirely - making JANS1N6317US the sole choice for flight hardware requiring certified radiation hardness and hermeticity.
Availability
JANS1N6317US is available at Aetrix Electronics and suitable for avionics power monitoring, satellite onboard computer reference, tactical radio RF front-end biasing, and nuclear instrumentation signal conditioning requiring stable component supply across extended temperature and radiation environments.
Supply support for JANS1N6317US 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade components.
The JANS1N6317US belongs to Microsemi's MIL-PRF-19500/533 qualified Zener diode family, engineered specifically for voltage reference stability in mission-critical defense, space, and nuclear systems.
FAQ
What is the Zener voltage tolerance of JANS1N6317US?
JANS1N6317US has a nominal Zener voltage of 5.1 V with a standard tolerance of ±5%, as defined in MIL-PRF-19500/533. Tighter tolerances (±1% and ±2%) are available in other variants (e.g., JANS1N6317DUS and JANS1N6317CUS), but JANS1N6317US itself is specified at ±5%.
Is JANS1N6317US compatible with lead-free reflow processes?
JANS1N6317US features Sn/Pb finish on its copper end caps and is rated for solder temperature up to 260 °C for 10 seconds. While it is not RoHS compliant, it can be processed in lead-free reflow ovens provided peak temperature and time above liquidus comply with its 260 °C/10 s limit and thermal profile avoids exceeding TEC = 150 °C.
What is the maximum steady-state current for JANS1N6317US?
The maximum steady-state Zener current (IZM) for JANS1N6317US is 2.0 A, derived from its 0.5 W power rating and 5.1 V nominal Zener voltage (IZM = PD / VZ ≈ 0.5 W / 0.51 V ≈ 0.98 A), but the datasheet specifies 2.0 A as the absolute maximum regulator current before derating - consistent with its 83 Ω ZZK and 14 Ω ZZT values at defined test conditions.
Does JANS1N6317US require heatsinking in typical PCB applications?
JANS1N6317US does not require external heatsinking when mounted on standard FR4 PCBs with recommended pad dimensions (.067″ × .105″) and operated below 150 °C end-cap temperature. Its RθJEC of 35 °C/W enables sufficient conduction cooling through end-cap contact to metalized planes or chassis surfaces.
How is the cathode identified on JANS1N6317US?
The cathode of JANS1N6317US is marked by a single black band on the glass body - consistent with JEDEC-standard polarity marking for MELF diodes. This band must connect to the higher-potential node in shunt regulator configurations to ensure proper reverse-bias operation.
JANS1N6317US Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, B
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.4 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/533
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- B, SQ-MELF
JANS1N6317US FAQ
1.How can I place an order for JANS1N6317US through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N6317US 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 JANS1N6317US reliable?
The price and inventory of JANS1N6317US are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N6317US is usually 5 days.
3.What payment methods are accepted for JANS1N6317US?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N6317US transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N6317US?
JANS1N6317US orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N6317US 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 JANS1N6317US?
For technical support, including JANS1N6317US datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N6317US requirements.
6.How does Aetrix verify that JANS1N6317US is sourced from the original manufacturer or authorized distributors?
All JANS1N6317US 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 JANS1N6317US meets industry standards.
7.What is the process for return or replacement of JANS1N6317US?
All JANS1N6317US units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N6317US, 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 JANS1N6317US part is unused and in its original packaging.
Return procedure for JANS1N6317US:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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