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Microchip Technology JANS1N4969CUS/TR
- Part No.:
- JANS1N4969CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANS1N4969CUS/TR.pdf
- Description:
- DIODE ZENER 30V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,551
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Product details
Overview
JANS1N4969CUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation, with nominal Zener voltage of 30 V at 40 mA test current, ±1% tolerance (C suffix), and maximum dynamic impedance of 8 Ω at IZT - used in precision voltage regulation for avionics power conditioning and radiation-hardened instrumentation.
For engineers reviewing the JANS1N4969CUS/TR datasheet, JANS1N4969CUS/TR pinout, JANS1N4969CUS/TR application, or JANS1N4969CUS/TR equivalent, key selection criteria include its voidless-glass package, -65°C to +175°C operating temperature range, Category III metallurgical bond, MIL-PRF-19500/356 qualification, and 2.5 V maximum voltage regulation (ΔVZ) across 10–50% of IZM.
Technical Context
This JANS1N4969CUS/TR is part of Microsemi's high-reliability Zener series qualified to MIL-PRF-19500/356 under JANS level, featuring voidless hermetic glass construction with internal Category III metallurgical bonds and triple-layer passivation. It operates as a shunt voltage regulator with stable breakdown behavior over wide current (10–50% IZM) and temperature (-65°C to +175°C) ranges.
The device exhibits 8 Ω dynamic impedance at 40 mA, 2.5 V voltage regulation (ΔVZ), and 2.5 mA maximum reverse leakage at 22.8 V - confirming tight regulation performance suitable for critical biasing and reference applications where parametric drift must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 30 V ±1% at 40 mA - enables precise 30 V reference generation with minimal calibration burden. |
| Power Dissipation | 5 W @ TEC = 125°C - supports sustained regulation in high-temperature environments without derating below 125°C. |
| Dynamic Impedance ZZ | 8 Ω @ IZT - ensures low output impedance for stable regulation under varying load currents. |
| Voltage Regulation ΔVZ | 2.5 V max between 10% and 50% of IZM - guarantees predictable voltage deviation across operational current range. |
| Reverse Leakage IR | 2 μA max at VR = 22.8 V - minimizes parasitic current draw in high-impedance sensing circuits. |
| Operating Temperature | -65°C to +175°C - validated for extended-range operation in aerospace, downhole, and defense systems. |
| Thermal Resistance | 10°C/W junction-to-end-cap - informs thermal design for PCB pad layout and heatsinking requirements. |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs and copper end caps (Sn/Pb finish); "E" package (also designated D-5B), surface-mount, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during regulation; requires proper thermal anchoring to PCB copper for heat dissipation. |
| Cathode | Zener breakdown terminal | Connected to regulated voltage rail; cathode band identifies this terminal for correct orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal voids, ensuring long-term parameter stability in vacuum or high-humidity environments. |
| Category III metallurgical bond | Provides enhanced mechanical integrity and thermal cycling reliability per MIL-PRF-19500/356 for JANS-level parts. |
| Triple-layer passivation | Reduces surface leakage and improves long-term insulation resistance under ionizing radiation exposure. |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - allows handling without special ESD controls in production environments. |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for space and nuclear instrumentation without shielding overhead. |
Applications
| Aerospace Power Conditioning | Downhole Instrumentation Biasing |
|---|---|
|
Use Scenario: Regulating reference voltage for ADC front-end circuitry in satellite telemetry modules exposed to thermal cycling and radiation. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 30 V bias to precision op-amps and analog signal chains. Use Value: Maintains <±0.5% output variation across -65°C to +175°C and after 100 krad(Si) total ionizing dose exposure. |
Use Scenario: Supplying calibrated bias voltage to piezoelectric sensor amplifiers in oil/gas well logging tools operating at 175°C ambient. IC Role / Device Role / Timing Role: High-temperature Zener reference enabling accurate sensor signal scaling under extreme thermal stress. Use Value: Delivers stable 30 V regulation with only 2.5 V ΔVZ across 4–20 mA load range at 175°C junction temperature. |
| Military Avionics Voltage Clamping | Radiation-Hardened Test Equipment |
|
Use Scenario: Protecting sensitive analog inputs in flight control computers against transient overvoltage events on 28 V DC bus lines. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting voltage excursions to ≤33 V during 8.3 ms surges. Use Value: Withstands 5.5 A nonrepetitive surge current (IZSM) while maintaining post-surge VZ stability within 1%. |
Use Scenario: Serving as primary voltage reference in ground-based radiation test chambers requiring metrology-grade traceability. IC Role / Device Role / Timing Role: Primary 30 V reference standard for calibrating dosimetry measurement systems. Use Value: ±1% tolerance and <8 Ω dynamic impedance enable sub-0.1% measurement uncertainty in NIST-traceable setups. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4969CUS/TR | Same electrical specs but qualified to JANTXV level (lower screening rigor than JANS); 100% burn-in and lot acceptance testing omitted. | Suitable for high-reliability non-space programs where full JANS screening is not mandated by system spec. | Select JANTXV1N4969CUS/TR when cost sensitivity outweighs need for full MIL-PRF-19500/356 JANS compliance. |
| 1N4969CUS/TR | No military qualification; commercial-grade screening, no radiation hardness data, and unspecified metallurgical bond category. | Applicable only in benign-environment industrial systems with no temperature, radiation, or lifetime requirements. | Choose 1N4969CUS/TR only for prototyping or non-critical commercial designs where MIL-spec is unnecessary. |
Compared with JANS1N4969CUS/TR, JANTXV1N4969CUS/TR offers identical regulation performance at reduced cost and screening depth, while 1N4969CUS/TR lacks military qualification, radiation tolerance, and guaranteed Category III bonding - making it unsuitable for aerospace or defense deployments.
Availability
JANS1N4969CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, downhole instrumentation biasing, and military avionics voltage clamping requiring stable component supply across extended temperature and radiation environments.
Supply support for JANS1N4969CUS/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, radiation-hardened, and aerospace-grade components.
The JANS1N4969CUS/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener diode product line, engineered for mission-critical voltage regulation in environments demanding zero-failure tolerance.
FAQ
What is the Zener voltage tolerance of JANS1N4969CUS/TR?
JANS1N4969CUS/TR has a nominal Zener voltage of 30 V with ±1% tolerance, indicated by the "C" suffix per Microsemi's standard coding. This tolerance is verified at 25°C and maintained across the full -65°C to +175°C operating range per MIL-PRF-19500/356 screening requirements.
Is JANS1N4969CUS/TR qualified for space applications?
JANS1N4969CUS/TR is qualified to MIL-PRF-19500/356 JANS level and features inherent radiation hardness per Microsemi MicroNote 050. While not QML-V certified, its Category III metallurgical bond, voidless-glass construction, and 100 krad(Si) TID tolerance make it widely accepted in LEO and MEO satellite subsystems.
What is the maximum surge current rating for JANS1N4969CUS/TR?
JANS1N4969CUS/TR supports a nonrepetitive peak Zener surge current (IZSM) of 5.5 A for an 8.3 ms square-wave pulse, as specified in the Electrical Characteristics table. This rating assumes proper PCB thermal design and is validated per MIL-STD-750 Method 3013.
Does JANS1N4969CUS/TR require derating above 125°C?
Yes - JANS1N4969CUS/TR is rated for 5 W at TEC = 125°C and must be linearly derated to zero at 175°C. Derating slope is 0.05 W/°C above 125°C, based on its 10°C/W junction-to-end-cap thermal resistance and MIL-PRF-19500/356 thermal validation limits.
How is polarity identified on JANS1N4969CUS/TR?
JANS1N4969CUS/TR uses a cathode band to indicate polarity, consistent with JEDEC standard marking for Zener diodes. The banded end is the cathode and must be connected to the higher-potential node in shunt regulation configurations.
JANS1N4969CUS/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):
- 30 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 22.8 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
JANS1N4969CUS/TR FAQ
1.How can I place an order for JANS1N4969CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4969CUS/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 JANS1N4969CUS/TR reliable?
The price and inventory of JANS1N4969CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4969CUS/TR is usually 5 days.
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Once your JANS1N4969CUS/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 JANS1N4969CUS/TR?
For technical support, including JANS1N4969CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4969CUS/TR requirements.
6.How does Aetrix verify that JANS1N4969CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4969CUS/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 JANS1N4969CUS/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4969CUS/TR?
All JANS1N4969CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4969CUS/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 JANS1N4969CUS/TR part is unused and in its original packaging.
Return procedure for JANS1N4969CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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