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Microchip Technology JANTX1N5645A
- Part No.:
- JANTX1N5645A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-202AA, DO-13, Axial
- Datasheet:
-
JANTX1N5645A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:8,105
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Product details
Overview
JANTX1N5645A from Microchip Technology (formerly Microsemi) is a hermetically sealed, unidirectional transient voltage suppressor diode in a DO-13 metal package, designed for high-reliability aerospace and military applications. It features a 29.7 V minimum breakdown voltage (VBR), 26.8 V rated standoff voltage (VWM), and clamps transients to ≤47.7 V at 31.5 A peak pulse current (IPP), delivering 1500 W peak pulse power (10/1000 µs) for protection against ESD, EFT, and secondary lightning surges per IEC61000-4-2/4-4/4-5.
For engineers reviewing the JANTX1N5645A datasheet, JANTX1N5645A pinout, JANTX1N5645A application, or JANTX1N5645A equivalent, this device serves as a MIL-PRF-19500/500 qualified TVS for avionics power rail and signal line protection where hermetic sealing, radiation hardness, and −55 °C to +175 °C operation are mandatory.
Technical Context
The JANTX1N5645A operates as a unidirectional avalanche diode, entering controlled breakdown when reverse voltage exceeds its 29.7–36.3 V VBR range at 1 mA test current. Its response time is under 100 ps, enabling suppression of fast-rising transients before downstream circuitry sustains damage.
It is rated for 1500 W non-repetitive peak pulse power (10/1000 µs waveform), with thermal resistance of 50 °C/W junction-to-lead and 110 °C/W junction-to-ambient on FR4. The cathode is internally connected to the metal case, requiring proper grounding in PCB layout to ensure effective clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Rated Standoff) | 26.8 V - Maximum continuous reverse voltage before leakage exceeds 5 µA; sets upper limit for protected circuit's normal operating voltage. |
| VBR (Breakdown, min/max) | 29.7 V / 36.3 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system operating voltage with margin. |
| VC (Clamping, max) | 47.7 V @ 31.5 A - Peak voltage seen by protected load during worst-case 10/1000 µs surge; defines maximum stress on downstream components. |
| PPP (Peak Pulse Power) | 1500 W - Sustained energy absorption capability for standardized surge waveforms; enables compliance with IEC61000-4-5 Class 4 (42 Ω source). |
| TJ Range | −55 °C to +175 °C - Full military temperature range supported without derating; suitable for engine bay, avionics bays, and space-constrained high-temp environments. |
| Package | DO-13 (DO-202AA) - Hermetically sealed metal-glass case with tin-lead plating; provides moisture immunity, radiation hardness, and mechanical robustness for harsh deployment. |
| αVBR | 0.098 %/°C - Temperature coefficient of breakdown voltage; allows accurate VBR prediction across full operating range for design margining. |
Pinout & Package
DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads; cathode terminal electrically bonded to case and marked with diode symbol on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Transient current entry point | Connected to protected line; carries surge current into device during overvoltage events. |
| Cathode (Lead 1 / Case) | Clamping reference and return path | Internally tied to metal case; must be soldered to low-impedance ground plane to achieve specified VC and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic DO-13 metal package | Eliminates moisture ingress and long-term parameter drift; certified for MIL-PRF-19500/500 JANTX level reliability. |
| <100 ps response time | Enables suppression of sub-nanosecond ESD events before logic gates or analog front-ends experience latch-up or gate oxide rupture. |
| Inherent radiation hardness | Validated per MicroNote 050; supports deployment in satellites, UAVs, and nuclear instrumentation without additional shielding or screening. |
| 1500 W peak pulse rating (10/1000 µs) | Meets IEC61000-4-5 Class 4 (42 Ω source) for secondary lightning; protects 28 V DC aircraft bus and sensor interfaces. |
| −55 °C to +175 °C operation | Supports direct mounting on high-temp engine controllers or near power converters without external thermal management. |
Applications
| Aerospace Power Bus Protection | Avionics Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 28 V DC main distribution bus in commercial and military aircraft from load dump, inductive switching spikes, and induced lightning currents. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between bus and chassis ground to clamp transients above 26.8 V while remaining inert during normal operation. Use Value: Limits bus voltage to ≤47.7 V during 31.5 A surges, preventing damage to upstream regulators and downstream motor controllers per RTCA DO-160 Section 22. |
Use Scenario: Shielding ARINC 429 data receivers from ESD and RF-induced transients on airborne communication lines. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor mounted at connector interface to shunt fast transients before reaching receiver input stage. Use Value: Sub-100 ps response ensures clamping occurs prior to ARINC 429 receiver's 100 ns setup window, maintaining bit integrity during ESD events per IEC61000-4-2 Level 4. |
| Military Vehicle Electronics | Satellite Power Conditioning |
|
Use Scenario: Safeguarding 24 V control circuits in armored ground vehicles exposed to EMP-like transients from nearby weapon discharge or alternator load dump. IC Role / Device Role / Timing Role: Primary surge arrestor on vehicle CAN bus power rails and sensor supply lines, leveraging hermetic seal for humidity resistance. Use Value: Withstands 1500 W surges and operates from −55 °C to +175 °C, enabling uninterrupted function in desert and arctic deployments without derating. |
Use Scenario: Protecting DC-DC converter inputs in LEO satellite power systems subject to single-event burnout and total ionizing dose effects. IC Role / Device Role / Timing Role: Radiation-hardened TVS placed at primary power input to absorb TID-induced leakage surges and prevent latch-up propagation. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for redundant shielding or burn-in testing, reducing SWaP-C in critical subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N5645A | Higher qualification level (JANTXV per MIL-PRF-19500/500); tighter VBR tolerance (±5% vs ±10%), lower αVBR, and extended screening including burn-in and radiation testing. | Required for space-grade or nuclear-hardened systems where failure modes must be statistically bounded beyond standard JANTX requirements. | Select JANTXV1N5645A when mission-critical reliability demands zero latent defects and proven TID tolerance above 100 krad(Si). |
| 1N5645A (commercial) | No military qualification; not hermetically sealed (plastic DO-15); VBR tolerance ±10%, no radiation hardness validation, and −65 °C to +175 °C rating. | Suitable only for benign industrial or lab environments where cost and availability outweigh environmental resilience. | Choose 1N5645A only for prototyping or non-mission-critical ground equipment where DO-13 mechanical robustness is unnecessary. |
Compared with JANTX1N5645A, JANTXV1N5645A adds verified radiation tolerance and tighter parametric control for spaceflight, while 1N5645A sacrifices hermeticity and qualification rigor for cost-sensitive commercial use-neither is pin-compatible due to differing package outlines (DO-13 vs DO-15) and case bonding schemes.
Availability
JANTX1N5645A is available at Aetrix Electronics and suitable for aerospace power bus protection, avionics signal line hardening, and military vehicle electronics requiring stable component supply across extended production lifecycles and extreme environmental conditions.
Supply support for JANTX1N5645A 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
Microchip Technology acquired Microsemi in 2018 and maintains its high-reliability analog and discrete product lines, including military-qualified TVS diodes engineered for aerospace, defense, and industrial safety-critical systems.
The JANTX1N5645A belongs to Microchip's legacy Microsemi TVS family, specifically designed for hermetic, high-power transient suppression in avionics, ground vehicle electronics, and satellite power systems where long-term reliability under thermal, mechanical, and radiation stress is non-negotiable.
FAQ
What is the maximum clamping voltage of the JANTX1N5645A at its rated peak pulse current?
The JANTX1N5645A has a maximum clamping voltage (VC) of 47.7 V when subjected to its rated peak pulse current (IPP) of 31.5 A under the 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the highest voltage that will appear across the protected circuit during a worst-case transient event. The JANTX1N5645A maintains this clamping performance across its full military temperature range due to its low temperature coefficient of 0.098 %/°C.
Is the JANTX1N5645A hermetically sealed, and why does that matter for reliability?
Yes, the JANTX1N5645A uses a DO-13 (DO-202AA) hermetically sealed metal-glass package, confirmed in the Microsemi datasheet. This construction prevents moisture ingress, halts internal corrosion, and eliminates parameter drift over decades of field operation-critical for avionics and satellite systems where maintenance is impossible. The JANTX1N5645A's hermetic seal directly enables its −55 °C to +175 °C operational range and MIL-PRF-19500/500 qualification, distinguishing it from plastic-packaged alternatives.
Does the JANTX1N5645A meet IEC61000-4-5 for lightning surge immunity, and at what class?
Yes, the JANTX1N5645A meets IEC61000-4-5 for secondary lightning surge immunity. Per the datasheet, it supports Class 4 protection with a 42 Ω source impedance, covering up to 4 kV line-to-ground surges. It also qualifies for Class 1–3 with 12 Ω and 2 Ω source impedances depending on specific test configuration. The JANTX1N5645A achieves this through its 1500 W peak pulse power rating and sub-100 ps response time, ensuring clamping occurs before surge energy damages downstream circuitry.
How is the cathode terminal configured on the JANTX1N5645A, and what is its PCB layout implication?
The cathode terminal of the JANTX1N5645A is electrically connected to the metal case and designated as Lead 1 per the DO-13 mechanical drawing. This requires the case to be soldered directly to a low-impedance ground plane on the PCB-any thermal or mechanical isolation degrades clamping performance and thermal dissipation. The JANTX1N5645A's 50 °C/W junction-to-lead thermal resistance depends on this direct case-to-ground bond, making proper mounting essential to sustain its 1500 W pulse rating.
What is the standby leakage current specification for the JANTX1N5645A at its rated standoff voltage?
The JANTX1N5645A exhibits a maximum standby leakage current (ID) of 5 µA when biased at its rated standoff voltage (VWM) of 26.8 V, measured at TA = 25 °C. This ultra-low leakage ensures minimal power loss in always-on avionics systems and avoids false triggering of downstream undervoltage monitors. The JANTX1N5645A maintains this specification across its full operating temperature range, supporting reliable operation in battery-backed flight control units.
JANTX1N5645A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-202AA, DO-13, Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 33A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/500
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-13 (DO-202AA)
JANTX1N5645A FAQ
1.How can I place an order for JANTX1N5645A through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N5645A 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 JANTX1N5645A reliable?
The price and inventory of JANTX1N5645A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N5645A is usually 5 days.
3.What payment methods are accepted for JANTX1N5645A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N5645A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N5645A?
JANTX1N5645A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N5645A 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 JANTX1N5645A?
For technical support, including JANTX1N5645A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N5645A requirements.
6.How does Aetrix verify that JANTX1N5645A is sourced from the original manufacturer or authorized distributors?
All JANTX1N5645A 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 JANTX1N5645A meets industry standards.
7.What is the process for return or replacement of JANTX1N5645A?
All JANTX1N5645A units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N5645A, 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 JANTX1N5645A part is unused and in its original packaging.
Return procedure for JANTX1N5645A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N5645A Tags
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