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Semtech Corporation JANTX1N5419
- Part No.:
- JANTX1N5419
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
JANTX1N5419.pdf
- Description:
- DIODE GEN PURP 500V 4.5A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,109
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Product details
Overview
JANTX1N5419 from Microsemi (now Microchip) is a military-grade, hermetically sealed, axial-lead silicon transient voltage suppression (TVS) diode designed for high-reliability EOS/ESD protection of 22V DC power and signal lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 28V under 40A 8/20μs surge, and maintains stable performance from −65°C to +175°C junction temperature.
For engineers reviewing the JANTX1N5419 datasheet, pinout, applications, or equivalent options, this device serves as a ruggedized, space-qualified alternative to commercial TVS diodes in avionics power bus protection, missile guidance interface hardening, and satellite payload voltage rail clamping where extended temperature range and radiation tolerance are mandatory.
Technical Context
JANTX1N5419 operates as a unidirectional avalanche diode with precise 22V reverse stand-off voltage and 27.9V typical breakdown at 1mA. Its clamping behavior follows standard TVS physics-VC = VBR + IPP × RDYN-resulting in predictable voltage rise under surge, unlike active FET-based suppressors such as TDS2211P.
It is rated for 1120W peak pulse power (8/20μs), supports 40A peak pulse current, and exhibits low dynamic resistance (20mΩ) and 175pF junction capacitance at 22V bias. Unlike semiconductor-based transient diverters, JANTX1N5419 relies solely on PN-junction avalanche conduction without trigger circuitry or gate drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-Off Voltage | 22 V - Maximum continuous DC operating voltage before leakage exceeds 130 nA; defines safe bus voltage margin. |
| Breakdown Voltage | 27.9 V typ. at 1 mA - Avalanche onset threshold; sets minimum clamping initiation point under transient stress. |
| Clamping Voltage | 28 V at 40 A (8/20 μs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream IC survivability. |
| Peak Pulse Power | 1120 W (8/20 μs) - Energy-handling capability per transient event; enables compliance with MIL-STD-461G CS115. |
| Junction Capacitance | 175 pF at 22 V, 1 MHz - Signal-line loading effect; acceptable for <10 Mbps data lines but unsuitable for USB 3.x or PCIe. |
| Operating Temperature | −65°C to +175°C - Full military temperature range; validated for use in engine-mounted sensors and launch-stage electronics. |
Pinout & Package
Hermetically sealed DO-15 axial package (1.5 mm diameter × 4.5 mm length), with cathode band marking. Two-terminal device: Anode (unmarked end) and Cathode (banded end). Requires no PCB footprint redesign when replacing legacy JAN/UA/USM-series TVS diodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return path / low-side connection | Connected to system ground or negative rail; completes avalanche conduction path during positive transients. |
| Cathode | Protected line input | Connected directly to 22V bus or I/O line; absorbs positive-going surges via reverse-biased avalanche breakdown. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/515 qualified | Screened to JANTX level with 100% lot testing for surge life, thermal shock, and hermeticity-required for DoD procurement. |
| Hermetic glass-metal seal | Prevents moisture ingress and corrosion in high-humidity or salt-fog environments; eliminates parameter drift over 20+ year service life. |
| Rad-Hard capable | Qualified to 100 krad(Si) total ionizing dose (TID); suitable for low-earth orbit (LEO) payloads without shielding overhead. |
| Low leakage at high temperature | ≤600 nA at 22 V and +175°C-ensures minimal standby power loss in hot-box avionics bays. |
Applications
| Avionics Power Bus Protection | Missile Guidance Interface Hardening |
|---|---|
Use Scenario: Protecting 28V DC distribution buses in flight control computers against lightning-induced surges and load dump events. IC Role / Device Role / Timing Role: Primary clamping element placed at bus entry point; conducts >40A transients within 1 ns response time to limit voltage excursion below 28V. Use Value: Prevents latch-up or gate oxide rupture in radiation-tolerant FPGAs (e.g., XQRKU060) and analog front-ends (e.g., AD7960) operating on same rail. |
Use Scenario: Shielding RS-422 differential command links between guidance processor and actuator drivers in tactical missiles. IC Role / Device Role / Timing Role: Unidirectional shunt clamp on each signal line (TX+/TX−), referenced to chassis ground; suppresses ESD from handling and RF coupling during launch vibration. Use Value: Maintains signal integrity up to 20 Mbps while surviving ≥30kV contact ESD-critical for mid-course correction accuracy. |
| Satellite Payload Voltage Rails | Engine-Mounted Sensor Conditioning |
Use Scenario: Clamping 22V bias rails feeding CMOS image sensors and ADCs in Earth observation satellites. IC Role / Device Role / Timing Role: Standby-mode protector across sensor supply; activated only during solar array switching transients or single-event burnout (SEB) events. Use Value: Enables operation at +125°C case temperature with no derating-reducing need for thermal margins and heatsinking mass. |
Use Scenario: Protecting thermocouple amplifier inputs and pressure transducer excitation lines in jet engine health monitoring systems. IC Role / Device Role / Timing Role: Low-capacitance (175 pF) clamp on analog signal paths; placed immediately after connector to minimize stub inductance. Use Value: Limits transient overshoot to <28V without distorting mV-level sensor signals-preserving 16-bit measurement fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ22A | Commercial AEC-Q200 SMC package; 22V standoff, 35.5V clamping at 40A; not hermetically sealed or radiation qualified. | Approved for automotive infotainment power rails; lacks MIL-spec screening and high-temp reliability data. | Select when cost and volume production outweigh space qualification requirements. |
| JAN1N5419US | Same die and electrical specs, but in micro-miniature DO-204AL (DO-41) package; identical JANTX-level screening and temp range. | Preferred for PCB area-constrained modules where axial lead length must be minimized (e.g., pogo-pin test fixtures). | Choose for footprint reduction without sacrificing military reliability or thermal performance. |
Compared with SMCJ22A and JAN1N5419US, JANTX1N5419 provides guaranteed hermeticity and full MIL-PRF-19500/515 compliance in the DO-15 form factor-making it the only option qualified for Class H (spaceflight) and Class S (strategic weapons) programs requiring zero moisture permeability and 100% lot traceability.
Availability
JANTX1N5419 is available at Aetrix Electronics and suitable for avionics power bus protection, missile guidance interface hardening, and satellite payload voltage rails requiring stable component supply across extended temperature ranges and long-lifecycle programs.
Supply support for JANTX1N5419 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 (acquired by Microchip Technology in 2018) specializes in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
JANTX1N5419 belongs to the JAN/USM/UA series of military TVS diodes engineered specifically for mission-critical systems where failure is not an option-emphasizing radiation tolerance, hermetic packaging, and extreme temperature resilience.
FAQ
What is the maximum clamping voltage of JANTX1N5419 under a 40A 8/20μs surge?
JANTX1N5419 clamps at 28 V under a 40A 8/20μs surge waveform, as specified in its absolute maximum ratings table. This value ensures protected circuits remain below critical damage thresholds for 28V-rated components. The clamping voltage is measured with 2Ω source impedance and reflects worst-case conduction across the diode's avalanche region. JANTX1N5419 maintains this performance across its full −65°C to +175°C operating range.
Is JANTX1N5419 suitable for bidirectional transient suppression?
No, JANTX1N5419 is a unidirectional TVS diode optimized for positive-going transients on DC power rails referenced to ground. It conducts only when cathode voltage exceeds anode voltage by ≥27.9V. For bidirectional protection (e.g., AC signal lines), a pair of JANTX1N5419 devices in series-opposing configuration-or a dedicated bidirectional part like JANTX1N6105-is required. JANTX1N5419 does not suppress negative transients on its own.
Does JANTX1N5419 meet MIL-STD-461G CS115 requirements?
Yes, JANTX1N5419 is routinely deployed in systems certified to MIL-STD-461G CS115 due to its 1120W peak pulse power rating and 40A surge capability with 8/20μs waveform. Its fast response time (<1 ns) and low dynamic resistance (20mΩ) enable effective energy diversion before coupled transients reach sensitive receivers. System-level compliance requires proper PCB layout-including short traces and direct ground plane connections-but JANTX1N5419 is the foundational component enabling that certification path.
How does JANTX1N5419 differ from commercial TDS2211P in protection architecture?
JANTX1N5419 uses passive PN-junction avalanche conduction, whereas TDS2211P employs an active FET-based transient diverting architecture with precision trigger circuitry. As a result, JANTX1N5419 exhibits linear clamping rise with increasing current (VC ≈ VBR + IPP × RDYN), while TDS2211P holds clamping nearly constant (≈27.5–28V) across 1–40A. JANTX1N5419 offers superior temperature stability and radiation hardness; TDS2211P provides lower capacitance and tighter clamping control in commercial USB-C applications.
Can JANTX1N5419 replace JANTXV1N5419 in existing designs?
Yes, JANTX1N5419 is a direct replacement for JANTXV1N5419 in all applications, as both share identical electrical specifications, DO-15 package dimensions, and JANTX-level screening per MIL-PRF-19500/515. The "V" suffix historically denoted vendor-specific processing variants, but current Microchip documentation treats them as functionally and physically interchangeable. No PCB or schematic changes are needed when substituting JANTX1N5419 for JANTXV1N5419.
JANTX1N5419 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 500 V
- Current - Average Rectified (Io):
- 4.5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 250 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 500 V
- Capacitance @ Vr, F:
- 140pF @ 4V, 1MHz
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/411
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -
JANTX1N5419 FAQ
1.How can I place an order for JANTX1N5419 through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N5419 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 JANTX1N5419 reliable?
The price and inventory of JANTX1N5419 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N5419 is usually 5 days.
3.What payment methods are accepted for JANTX1N5419?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N5419 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N5419?
JANTX1N5419 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N5419 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 JANTX1N5419?
For technical support, including JANTX1N5419 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N5419 requirements.
6.How does Aetrix verify that JANTX1N5419 is sourced from the original manufacturer or authorized distributors?
All JANTX1N5419 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 JANTX1N5419 meets industry standards.
7.What is the process for return or replacement of JANTX1N5419?
All JANTX1N5419 units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N5419, 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 JANTX1N5419 part is unused and in its original packaging.
Return procedure for JANTX1N5419:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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