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Microchip Technology 1N5639A/TR
- Part No.:
- 1N5639A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5639A/TR.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:7,397
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Product details
Overview
1N5639A/TR from Microchip Technology is a unidirectional transient voltage suppressor (TVS) diode in a hermetically sealed DO-13 metal package, designed for high-reliability surge protection in aerospace, avionics, and industrial systems. It features a 1500 W peak pulse power rating (10/1000 µs), 16.2 V minimum breakdown voltage (VBR), 14.5 V rated standoff voltage (VWM), and clamps transients to ≤26.5 V at 56.5 A peak pulse current (IPP).
For engineers reviewing the 1N5639A/TR datasheet, 1N5639A/TR pinout, 1N5639A/TR application, or 1N5639A/TR equivalent, this device serves as a military-grade, through-hole TVS solution for IEC 61000-4-2 ESD, IEC 61000-4-4 EFT, and secondary lightning protection per IEC 61000-4-5 with 2–42 Ω source impedance.
Technical Context
The 1N5639A/TR operates as a unidirectional avalanche diode, entering controlled breakdown when reverse voltage exceeds its 14.5 V standoff threshold. Its <100 ps response time enables sub-nanosecond clamping of fast transients, while its hermetic DO-13 package ensures stable performance across -55°C to +175°C operating temperature range.
It delivers 1500 W peak pulse power under JEDEC-standard 10/1000 µs waveform, with thermal resistance of 50°C/W junction-to-lead (at 10 mm lead length). The cathode is internally connected to the metal case, enforcing fixed polarity and enabling robust grounding in high-surge PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14.5 V - Maximum continuous reverse operating voltage before conduction begins; matches 12 V rail systems with margin. |
| VBR @ IBR | 16.2–17.1 V @ 1 mA - Confirmed breakdown threshold; ensures reliable triggering above normal operating voltage. |
| VC @ IPP | 26.5 V @ 56.5 A - Clamped voltage during worst-case surge; limits downstream IC stress to safe levels. |
| PPP | 1500 W - Peak pulse power handling capability under 10/1000 µs waveform; supports MIL-STD-461/DO-160 Level 3–4 surges. |
| TJ Range | -55°C to +175°C - Full military temperature range; validated for engine bay, avionics bays, and downhole electronics. |
| Package | DO-13 (DO-202AA) - Hermetically sealed metal-glass case; provides superior moisture resistance and radiation hardness vs. plastic packages. |
| Response Time | <100 ps - Enables effective suppression of ESD events (IEC 61000-4-2 ±8 kV contact) before damage occurs. |
Pinout & Package
DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads. Cathode terminal is electrically bonded to the metal case; polarity marked by diode symbol on body. Weight: 1.4 g. Solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Input/Line-side connection | Connected to protected line (e.g., 12 V supply rail); carries surge current into device during clamping. |
| Cathode (Lead 1 / Case) | Ground-reference node | Internally tied to metal case; must be soldered to low-inductance ground plane for optimal clamping performance. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Enables precise overvoltage clamping on DC rails without affecting forward-biased operation or signal integrity. |
| 1500 W peak pulse power (10/1000 µs) | Withstands repeated high-energy transients common in automotive load-dump and avionics switching environments. |
| Hermetic DO-13 metal package | Eliminates moisture ingress and outgassing risks; certified for space-qualified and high-reliability military applications. |
| 0.088 %/°C VBR tempco | Ensures predictable breakdown voltage shift over temperature-critical for stable protection margins in wide-temp deployments. |
| MIL-PRF-19500/500 qualified (JANTXV option) | Validated for Class H (−55°C to +125°C) and Class K (+175°C) operation with full lot traceability and screening. |
Applications
| Aerospace Power Distribution | Avionics Data Bus Protection |
|---|---|
|
Use Scenario: Protecting 28 V DC distribution lines in aircraft electrical systems against load dump, inductive kickback, and secondary lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between bus rail and chassis ground to clamp transients below 30 V. Use Value: Maintains system uptime by preventing latch-up or burnout in upstream DC-DC converters and bus controllers during DO-160 Section 22 surge events. |
Use Scenario: Safeguarding ARINC 429 or MIL-STD-1553B data line receivers from ESD and coupled RF transients in flight control units. IC Role / Device Role / Timing Role: Standoff-clamp TVS on receiver input pins to limit voltage excursions without loading the differential bus. Use Value: Preserves signal integrity and bit error rate (BER) by clamping transients within 100 ps-faster than receiver input protection diodes. |
| Industrial Motor Drive Control | Military Vehicle Power Systems |
|
Use Scenario: Shielding microcontroller I/O and gate driver supplies in variable-frequency drives exposed to IGBT switching noise and relay bounce. IC Role / Device Role / Timing Role: Rail-to-ground TVS on 5 V/12 V logic rails to absorb repetitive 1–10 A, 100 ns–1 µs transients. Use Value: Extends controller lifetime by limiting voltage overshoot to ≤26.5 V, well below typical 30 V absolute maximum ratings. |
Use Scenario: Hardening 24 V vehicle power networks against EMP, cranking spikes, and alternator load dump per MIL-STD-1275B. IC Role / Device Role / Timing Role: Primary surge suppression element mounted directly at power entry point with short ground path to chassis. Use Value: Meets Class III (100 V, 50 ms) and Class V (100 V, 100 ms) requirements with no derating up to +175°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ16A | Surface-mount SMC package; same VWM (16 V), slightly higher VC (25.8 V @ 64.7 A); lower thermal resistance (junction-to-ambient). | Designed for automated assembly and compact PCBs; unsuitable for through-hole or high-radiation environments. | Select when board space is constrained and hermetic sealing is not required. |
| 1N5639 | Commercial-grade version; identical electrical specs but lacks JANTXV qualification, tighter VBR tolerance, and MIL-PRF-19500 screening. | Approved for commercial/industrial use only; excluded from defense/aerospace BOMs requiring military traceability. | Select only for cost-sensitive non-military applications where full MIL-spec compliance is unnecessary. |
Compared with SMCJ16A and 1N5639, the 1N5639A/TR uniquely combines hermetic DO-13 packaging, −55°C to +175°C operation, and JANTXV qualification-making it the sole choice for mission-critical avionics and space-qualified power protection where reliability trumps form factor or cost.
Availability
1N5639A/TR is available at Aetrix Electronics and suitable for aerospace power distribution, avionics data bus protection, and military vehicle power systems requiring stable component supply, long-term obsolescence management, and full MIL-PRF-19500 traceability.
Supply support for 1N5639A/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
Microchip Technology (formerly Microsemi) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5639A/TR belongs to Microchip's legacy JAN/JANTXV TVS diode family, engineered specifically for military and aerospace surge protection where hermeticity, temperature resilience, and long-term reliability outweigh cost or size constraints.
FAQ
What is the standoff voltage (VWM) of the 1N5639A/TR?
The 1N5639A/TR has a rated standoff voltage (VWM) of 14.5 V, meaning it remains non-conductive under continuous reverse bias up to this level. This value is selected to safely accommodate nominal 12 V systems with sufficient margin against ripple and tolerance drift, while ensuring reliable clamping onset above normal operating conditions. The 1N5639A/TR datasheet confirms this parameter at 25°C with ≤5 µA leakage.
Does the 1N5639A/TR meet IEC 61000-4-5 for secondary lightning protection?
Yes-the 1N5639A/TR is explicitly rated for secondary lightning protection per IEC 61000-4-5 across multiple source impedances: it supports Class 4 protection with 42 Ω source impedance, Class 3 with 12 Ω, and Class 2 with 2 Ω. Its 1500 W peak pulse power and ≤26.5 V clamping voltage ensure compliant energy diversion without overstressing downstream circuitry during standardized surge waveforms.
Is the 1N5639A/TR suitable for high-temperature environments like engine control units?
Yes-the 1N5639A/TR is fully specified from −55°C to +175°C, with thermal resistance of 50°C/W junction-to-lead. Its hermetic DO-13 package eliminates moisture-related failure mechanisms, and its 0.088 %/°C VBR temperature coefficient ensures predictable clamping behavior across extreme ambient ranges. This makes the 1N5639A/TR appropriate for under-hood automotive and turbine engine control applications.
How does the 1N5639A/TR differ from the commercial 1N5639 part?
The 1N5639A/TR is the military-qualified "A" suffix variant with tighter VBR tolerance (16.2–17.1 V vs. wider commercial spread), full MIL-PRF-19500/500 screening (including burn-in, temperature cycling, and lot traceability), and guaranteed operation to +175°C. The base 1N5639 lacks these qualifications and is restricted to commercial temperature range (−55°C to +125°C) and screening levels.
What is the clamping voltage (VC) of the 1N5639A/TR at its rated peak pulse current?
The 1N5639A/TR clamps to a maximum of 26.5 V at its rated peak pulse current (IPP) of 56.5 A under the standard 10/1000 µs waveform. This VC value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during worst-case surge events-ensuring compatibility with 30 V-rated components and robust system-level immunity.
1N5639A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-13
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-13
1N5639A/TR FAQ
1.How can I place an order for 1N5639A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5639A/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 1N5639A/TR reliable?
The price and inventory of 1N5639A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5639A/TR is usually 5 days.
3.What payment methods are accepted for 1N5639A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5639A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5639A/TR?
1N5639A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5639A/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 1N5639A/TR?
For technical support, including 1N5639A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5639A/TR requirements.
6.How does Aetrix verify that 1N5639A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5639A/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 1N5639A/TR meets industry standards.
7.What is the process for return or replacement of 1N5639A/TR?
All 1N5639A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5639A/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 1N5639A/TR part is unused and in its original packaging.
Return procedure for 1N5639A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5639A/TR Tags
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