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Microchip Technology JANTX1N4970CUS/TR
- Part No.:
- JANTX1N4970CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4970CUS/TR.pdf
- Description:
- DIODE ZENER 33V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,913
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Product details
Overview
JANTX1N4970CUS/TR from Microsemi is a surface-mount, hermetically sealed, voidless-glass 5 W Zener diode with nominal Zener voltage of 33 V, ±2% tolerance (C suffix), and maximum power dissipation of 5 W at 140 °C end-cap temperature. It operates across –65 °C to +175 °C junction temperature range and delivers stable voltage regulation in high-reliability military and aerospace power conditioning circuits.
For engineers reviewing the JANTX1N4970CUS/TR datasheet, JANTX1N4970CUS/TR pinout, JANTX1N4970CUS/TR application, or JANTX1N4970CUS/TR equivalent, this part serves as a rugged, radiation-hardened, ESD-insensitive voltage reference for critical analog supply rails, overvoltage clamping, and precision biasing where long-term parametric stability and MIL-PRF-19500/356 qualification are mandatory.
Technical Context
This device belongs to the JANTX-grade 1N4954US–1N4996US family, featuring triple-layer passivation and Category I internal metallurgical bonds for enhanced reliability. Its voidless hermetic glass construction eliminates moisture ingress and mitigates parameter drift under thermal cycling and radiation exposure.
The JANTX1N4970CUS/TR exhibits 10 Ω dynamic impedance at 40 mA test current, 2.8 V maximum voltage regulation change between 10% and 50% of max Zener current, and 0.095 %/°C temperature coefficient - enabling predictable performance across wide operating ranges without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±2% at 40 mA - precise reference for regulated 3.3 V–36 V system rails |
| Power Dissipation | 5 W @ TEC = 140 °C - supports continuous operation in conduction-cooled avionics enclosures |
| Dynamic Impedance (ZZ) | 10 Ω @ IZT = 40 mA - low AC impedance ensures minimal output ripple under load transients |
| Max Reverse Leakage | 2 μA @ VR = 25.1 V - negligible standby current in battery-backed or low-power hold-up circuits |
| Temp Coefficient (αVZ) | +0.095 %/°C - predictable positive drift enables accurate thermal error budgeting in sensor signal chains |
| Surge Current (IZSM) | 5.0 A @ 8.3 ms - withstands lightning-induced transients per MIL-STD-461 CS115 |
| Operating Temperature | –65 °C to +175 °C - qualified for engine bay, space payload, and downhole electronics |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs; "E" package (also designated D-5B); cathode indicated by band; copper end caps with Sn/Pb finish; weight 539 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential rail; enables forward-bias protection and clamp discharge path |
| Cathode | Zener breakdown terminal | Connected to regulated node; provides stable reference voltage when reverse biased above 33 V |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture-induced parameter shift and corrosion failure modes in humid or vacuum environments |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycle survivability >1000 cycles between –65 °C and +175 °C |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling and assembly without special grounding protocols or ionized air systems |
| Inherent radiation hardness | Validated per MicroNote 050 - suitable for low-dose-rate space applications without shielding overhead |
| MIL-PRF-19500/356 qualification | Meets screening, testing, and traceability requirements for Class S (space) and Class B (military) programs |
Applications
| Aerospace Power Conditioning | Avionics Sensor Biasing |
|---|---|
|
Use Scenario: Regulating auxiliary 28 V DC bus in flight control computers exposed to thermal extremes and ionizing radiation. IC Role / Device Role / Timing Role: Zener diode providing primary voltage reference for DC-DC converter feedback and analog monitoring circuitry. Use Value: Maintains ±2% regulation over –65 °C to +175 °C with <2 μA leakage, ensuring fault-free operation during cold-soak and engine-start transients. |
Use Scenario: Supplying stable bias voltage to piezoresistive pressure transducers in engine health monitoring systems. IC Role / Device Role / Timing Role: Precision shunt reference establishing excitation voltage for Wheatstone bridge sensors. Use Value: 0.095 %/°C tempco and 10 Ω dynamic impedance minimize sensor offset drift and noise coupling into 24-bit ADC front-ends. |
| Tactical Radio Overvoltage Protection | Satellite Payload Voltage Clamping |
|
Use Scenario: Clamping 12 V power input against automotive load-dump spikes (ISO 7637-2 Pulse 5a) in manpack radios. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 5 A surge currents for 8.3 ms without degradation. Use Value: Withstands repeated 5 A surges per MIL-STD-461 CS115 while maintaining 33 V clamping threshold within ±2%. |
Use Scenario: Protecting CMOS imaging sensor bias rails from single-event burnout (SEB) in LEO satellite payloads. IC Role / Device Role / Timing Role: Radiation-hardened shunt regulator limiting voltage excursion during particle-induced latch-up events. Use Value: Inherent radiation hardness and hermetic seal prevent parametric shift or catastrophic failure after 10 krad(Si) total ionizing dose exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4970CUS/TR | Higher screening level (JANTXV vs JANTX); tighter lot acceptance testing and extended temperature life testing | Required for Class S space missions with zero defect tolerance; not needed for ground-based military platforms | Select JANTXV only if mission assurance requires full JANTXV screening per MIL-PRF-19500/356 Table I |
| 1N4970US | Commercial-grade version; no MIL-PRF-19500 qualification; same electrical specs and package | Suitable for non-mission-critical industrial prototypes or cost-sensitive test fixtures | Use 1N4970US for development validation; migrate to JANTX1N4970CUS/TR before production release |
Compared with JANTXV1N4970CUS/TR, the JANTX1N4970CUS/TR offers sufficient reliability for Class B military systems without the added cost and lead time of JANTXV screening; compared with 1N4970US, it guarantees traceable lot-level MIL-PRF-19500 compliance required for DoD procurement.
Availability
JANTX1N4970CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, avionics sensor biasing, and tactical radio overvoltage protection requiring stable component supply across extended temperature ranges and radiation environments.
Supply support for JANTX1N4970CUS/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 defense, aerospace, and industrial markets.
The JANTX1N4970CUS/TR belongs to Microsemi's legacy MIL-qualified Zener diode product line, engineered specifically for voltage regulation and transient suppression in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance and test current for JANTX1N4970CUS/TR?
The JANTX1N4970CUS/TR has a nominal Zener voltage of 33 V with ±2% tolerance, verified at a test current (IZT) of 40 mA. This tolerance is guaranteed per MIL-PRF-19500/356 screening and applies across the full operating temperature range of –65 °C to +175 °C. The C suffix explicitly denotes the ±2% grade.
Does JANTX1N4970CUS/TR require derating above 140 °C end-cap temperature?
Yes, JANTX1N4970CUS/TR must be linearly derated above 140 °C end-cap temperature, reaching zero power dissipation at +175 °C. Derating follows a slope of 5 W / 35 °C = 143 mW/°C. This requirement is defined in the Maximum Ratings table and applies regardless of ambient or board-level cooling method.
Is JANTX1N4970CUS/TR compatible with lead-free reflow processes?
No - JANTX1N4970CUS/TR features Sn/Pb (tin/lead) finish on copper end caps and is not qualified for Pb-free reflow. Its maximum peak reflow temperature is limited to 235 °C per MIL-STD-202 Method 210, and Pb-free profiles exceeding 260 °C will compromise solder joint integrity and hermetic seal reliability.
What is the maximum reverse leakage current specification for JANTX1N4970CUS/TR?
JANTX1N4970CUS/TR specifies a maximum reverse leakage current (IR) of 2 μA at VR = 25.1 V and TJ = 25 °C. This value remains ≤5 μA up to +125 °C per characterization data in the SD44A datasheet, supporting ultra-low-power hold-up and standby functions.
How does the temperature coefficient of JANTX1N4970CUS/TR affect its regulation accuracy?
JANTX1N4970CUS/TR has a temperature coefficient (αVZ) of +0.095 %/°C, meaning its Zener voltage increases by approximately 31.4 mV per °C rise from 25 °C. Over a –55 °C to +125 °C operating range, this contributes ±1.5 V drift - a known, linear error that can be compensated in closed-loop designs or accepted in open-loop biasing where absolute accuracy is secondary to stability.
JANTX1N4970CUS/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):
- 33 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 25.1 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
JANTX1N4970CUS/TR FAQ
1.How can I place an order for JANTX1N4970CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4970CUS/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 JANTX1N4970CUS/TR reliable?
The price and inventory of JANTX1N4970CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4970CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4970CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4970CUS/TR transactions.
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JANTX1N4970CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4970CUS/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 JANTX1N4970CUS/TR?
For technical support, including JANTX1N4970CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4970CUS/TR requirements.
6.How does Aetrix verify that JANTX1N4970CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4970CUS/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 JANTX1N4970CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4970CUS/TR?
All JANTX1N4970CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4970CUS/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 JANTX1N4970CUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4970CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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