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Microchip Technology JANS1N4967CUS/TR
- Part No.:
- JANS1N4967CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANS1N4967CUS/TR.pdf
- Description:
- DIODE ZENER 24V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:3,965
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Product details
Overview
JANS1N4967CUS/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 24 V ±2% (C suffix), dynamic impedance 5.0 Ω at 50 mA test current, and operating junction temperature range −65 °C to +175 °C. It serves as a precision voltage reference and overvoltage clamp in radiation-hardened avionics power conditioning circuits.
For engineers reviewing the JANS1N4967CUS/TR datasheet, JANS1N4967CUS/TR pinout, JANS1N4967CUS/TR application, or JANS1N4967CUS/TR equivalent, this part is selected for high-reliability, high-temperature, low-leakage (>2 μA @ 18.2 V) Zener regulation where voidless-glass hermeticity and MIL-PRF-19500/356 qualification are mandatory.
Technical Context
This JANS1N4967CUS/TR belongs to the 1N4954US–1N4996US family of surface-mount Zener regulators qualified to MIL-PRF-19500/356 under JANS level. It uses a voidless hermetically sealed glass package with tungsten slugs and copper end caps with Sn/Pb finish, featuring Category I internal metallurgical bonds and triple-layer passivation for ESD immunity per MIL-STD-750 Method 1020.
Its electrical behavior is defined by a sharp breakdown knee (IZK = 1 mA), regulated voltage change ΔVZ ≤ 0.5 V between 10% and 50% of IZM, and temperature coefficient αVZ = +0.090 %/°C at IZT = 50 mA - enabling stable reference generation across extreme thermal excursions without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 24 V ±2% at IZT = 50 mA - enables precise 24 V rail clamping with tight tolerance for mission-critical analog monitoring. |
| Power Dissipation | 5 W @ TEC = 140 °C - supports continuous operation in conduction-cooled aerospace enclosures without forced airflow. |
| Dynamic Impedance ZZ | 5.0 Ω @ IZT = 50 mA - ensures minimal output voltage variation under load transients in feedback-sensing applications. |
| Max Reverse Leakage IR | 2 μA @ VR = 18.2 V - guarantees negligible standby current draw in battery-backed systems at 75% of VZ. |
| Operating Temperature | −65 °C to +175 °C TJ - validated for use in turbine engine control units and space-grade power supplies. |
| Thermal Resistance θJC | 7 °C/W junction-to-end-cap - allows direct thermal path to chassis ground via soldered end caps for passive cooling. |
| Surge Current IZSM | 6.5 A @ 8.3 ms - withstands lightning-induced transients in aircraft DC distribution networks. |
Pinout & Package
Package: Hermetically sealed voidless hard glass case ("E" or "D-5B") with copper end caps (Sn/Pb finish); polarity indicated by cathode band; weight 539 mg; tape-and-reel compliant with EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node; forms low-impedance return path during forward bias. |
| Cathode | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased to maintain stable 24 V reference under varying load currents. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination risk over 20+ year service life in vacuum or high-humidity environments. |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycling reliability >1000 cycles between −65 °C and +175 °C without bond fatigue. |
| Triple-layer passivation | Provides immunity to surface contamination and ion migration in high-voltage bias conditions up to 300 V. |
| Nonsensitive to ESD | Withstands ≥8 kV HBM per MIL-STD-750 Method 1020 - no handling precautions required during board assembly. |
| Radiation hardness | Qualified per MicroNote 050 for total ionizing dose (TID) >100 krad(Si) - suitable for low-earth orbit satellite power systems. |
Applications
| Avionics Power Conditioning | Spacecraft Voltage Reference |
|---|---|
|
Use Scenario: Regulating 24 V DC bus in flight control actuator power modules exposed to −55 °C to +125 °C ambient and EMI-rich motor drive environments. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference and transient overvoltage clamp in unregulated DC-DC converter feedback loop. Use Value: Maintains ±2% output accuracy across full temperature range and survives 6.5 A surge events without parameter shift or parametric drift. |
Use Scenario: Providing stable 24 V reference for ADC biasing and sensor excitation in Mars rover power management unit. IC Role / Device Role / Timing Role: Precision voltage reference element in radiation-tolerant analog front-end, operating continuously at 175 °C junction temperature. Use Value: Delivers <2 μA leakage at 18.2 V and zero parameter degradation after 100 krad(Si) TID exposure per MicroNote 050. |
| Turbine Engine Control Unit | Nuclear Instrumentation |
|
Use Scenario: Clamping supply rails in FADEC (Full Authority Digital Engine Control) boards mounted adjacent to combustion chambers. IC Role / Device Role / Timing Role: High-temperature Zener clamp protecting microcontroller I/O pins from load-dump transients up to 60 V. Use Value: Operates reliably at 175 °C junction temperature with 7 °C/W thermal resistance enabling direct chassis heat sinking. |
Use Scenario: Stabilizing bias voltage for gamma-ray detector preamplifiers in reactor containment monitoring systems. IC Role / Device Role / Timing Role: Low-noise, low-drift Zener reference ensuring <0.01% gain stability over 15-year deployment. Use Value: Achieves +0.090 %/°C tempco and <5 Ω dynamic impedance - minimizing temperature-induced offset in critical measurement paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4967CUS/TR | Same electrical specs and package, but qualified to JANTXV level (lower screening rigor than JANS); 100% burn-in omitted. | Suitable for non-flight-critical subsystems where full JANS screening is not mandated by program requirements. | Select JANTXV1N4967CUS/TR when cost reduction is prioritized and radiation hardness is not required. |
| 1N4967US | Commercial-grade version; no MIL-PRF-19500 qualification; same Zener voltage and package, but no radiation or ESD testing. | Applicable only in benign-temperature, non-safety-critical industrial controls with no long-term reliability demands. | Choose 1N4967US only for prototyping or non-mission-critical ground support equipment. |
Compared with JANTXV1N4967CUS/TR and 1N4967US, the JANS1N4967CUS/TR delivers verified radiation hardness, full MIL-PRF-19500/356 screening including 100% burn-in, and guaranteed −65 °C to +175 °C operation - making it the sole option for flight hardware and nuclear instrumentation.
Availability
JANS1N4967CUS/TR is available at Aetrix Electronics and suitable for avionics power conditioning, spacecraft voltage reference, and turbine engine control unit designs requiring stable component supply under extended lead times and strict traceability.
Supply support for JANS1N4967CUS/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 manufacturer specializing in high-reliability, radiation-hardened, and military-qualified components.
The JANS1N4967CUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 Zener diode product line, engineered specifically for aerospace, defense, and nuclear applications demanding hermetic sealing, extreme temperature resilience, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of JANS1N4967CUS/TR?
The JANS1N4967CUS/TR has a nominal Zener voltage of 24 V with ±2% tolerance, indicated by the "C" suffix in the part number. This tolerance is specified at 25 °C and maintained across the full −65 °C to +175 °C operating temperature range per MIL-PRF-19500/356 screening. The JANS1N4967CUS/TR achieves this tight tolerance using precision diffusion and post-trim validation during manufacturing.
Does JANS1N4967CUS/TR require derating above 140 °C end-cap temperature?
Yes, JANS1N4967CUS/TR must be linearly derated above 140 °C end-cap temperature (TEC), reaching zero power dissipation at 175 °C. Its 5 W rating applies only at TEC = 140 °C; for example, at TEC = 155 °C, maximum allowable power drops to 2.5 W. This derating curve is defined in the Microsemi SD44A datasheet and verified per MIL-PRF-19500/356 thermal testing protocols.
Is JANS1N4967CUS/TR compatible with lead-free solder reflow profiles?
No - JANS1N4967CUS/TR features Sn/Pb-finished copper end caps and is not qualified for lead-free reflow. Its maximum peak reflow temperature is 235 °C for 10 seconds, consistent with Sn63/Pb37 eutectic solder. Lead-free profiles exceeding 260 °C risk intermetallic degradation and hermetic seal compromise, violating MIL-PRF-19500/356 process compliance for the JANS1N4967CUS/TR.
What is the maximum reverse leakage current for JANS1N4967CUS/TR at 18.2 V?
The maximum reverse leakage current for JANS1N4967CUS/TR is 2 μA at VR = 18.2 V and TJ = 25 °C. This value is measured per MIL-PRF-19500/356 test method 3011 and remains ≤5 μA across the full −65 °C to +125 °C storage range. The JANS1N4967CUS/TR's low leakage supports ultra-low-power hold-up circuits in backup power systems.
How does the temperature coefficient of JANS1N4967CUS/TR affect its performance at extremes?
JANS1N4967CUS/TR has a temperature coefficient αVZ of +0.090 %/°C at IZT = 50 mA, meaning its Zener voltage increases by ~21.6 mV per °C rise from 25 °C. At +175 °C, VZ rises to ~25.4 V - a deviation within system-level tolerance budgets for avionics regulators. This predictable positive drift is fully characterized and compensated in JANS1N4967CUS/TR design documentation.
JANS1N4967CUS/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):
- 24 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 18.2 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
JANS1N4967CUS/TR FAQ
1.How can I place an order for JANS1N4967CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4967CUS/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 JANS1N4967CUS/TR reliable?
The price and inventory of JANS1N4967CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4967CUS/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4967CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4967CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4967CUS/TR?
JANS1N4967CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4967CUS/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 JANS1N4967CUS/TR?
For technical support, including JANS1N4967CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4967CUS/TR requirements.
6.How does Aetrix verify that JANS1N4967CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4967CUS/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 JANS1N4967CUS/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4967CUS/TR?
All JANS1N4967CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4967CUS/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 JANS1N4967CUS/TR part is unused and in its original packaging.
Return procedure for JANS1N4967CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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