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Microchip Technology 1N5641A/TR
- Part No.:
- 1N5641A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5641A/TR.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:3,587
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Product details
Overview
1N5641A/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 and industrial systems. It features a 19.8 V minimum breakdown voltage (VBR), 17.8 V rated standoff voltage (VWM), 31.9 V maximum clamping voltage (VC) at 47 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the 1N5641A/TR datasheet, 1N5641A/TR pinout, 1N5641A/TR application, or 1N5641A/TR equivalent, this device serves as a military-grade, radiation-hardened TVS for secondary lightning protection (IEC61000-4-5 Class 4 with 42 Ω source), ESD/EFT suppression (IEC61000-4-2/-4), and inductive switching transient mitigation in avionics power rails and ruggedized control interfaces.
Technical Context
The 1N5641A/TR operates as a unidirectional avalanche diode, entering controlled breakdown when reverse voltage exceeds its 19.8–22.8 V VBR range at 1 mA test current. Its response time is under 100 ps, enabling sub-nanosecond clamping of fast transients without parasitic delay.
It is rated for 1500 W non-repetitive peak pulse power (10/1000 µs), with thermal resistance of 50 °C/W junction-to-lead and operating temperature range from –55 °C to +175 °C - validated for hermetic DO-13 packaging and MIL-PRF-19500/500 JANTXV qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Rated Standoff Voltage) | 17.8 V - Maximum continuous reverse voltage before leakage exceeds 5 µA; sets minimum system operating voltage margin. |
| VBR (Breakdown Voltage @ 1 mA) | 19.8–22.8 V - Confirmed avalanche onset range; ensures reliable triggering above nominal rail voltage. |
| VC (Clamping Voltage @ IPP) | 31.9 V @ 47 A - Peak voltage seen by protected circuit during 10/1000 µs surge; defines worst-case overvoltage stress. |
| PPP (Peak Pulse Power) | 1500 W - Sustained energy absorption capability for short-duration surges; enables robust Class 4 lightning protection. |
| IPP (Peak Pulse Current) | 47 A - Maximum transient current handled at rated clamping voltage; determines survivability against 42 Ω IEC61000-4-5 surges. |
| TJ Operating Range | –55 °C to +175 °C - Validated performance across extreme environments including avionics bays and engine compartments. |
| Package | DO-13 (DO-202AA) - Hermetically sealed metal-glass case with cathode-connected case; supports high-reliability, radiation-hardened deployment. |
Pinout & Package
DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads; cathode terminal electrically connected to case and marked with diode symbol on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Transient current entry point during reverse surge | Connected to protected line; carries full surge current into avalanche region when VRM exceeded. |
| Cathode (Lead 1 / Case) | Reference and return path | Internally bonded to metal case; must be tied to system ground or low-impedance reference plane for effective clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Enables precise clamping on positive-going transients while blocking normal forward conduction; ideal for DC power rail protection. |
| <100 ps response time | Prevents nanosecond-scale ESD/EFT events from propagating to sensitive downstream ICs before clamping activates. |
| Hermetic DO-13 metal package | Eliminates moisture ingress and outgassing risks in vacuum or high-humidity environments; meets MIL-STD-750 solderability requirements. |
| JANTXV qualification option | Supports full MIL-PRF-19500/500 compliance with tighter tolerances and extended screening - critical for flight-critical avionics. |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050; suitable for space-qualified and nuclear instrumentation applications. |
Applications
| Aerospace Power Distribution | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 24 V DC bus in airborne environmental control units from induced RF and secondary lightning surges. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient overvoltage on main power input rail. Use Value: Limits surge-induced rail collapse to ≤31.9 V, preserving operation of downstream DC-DC converters and microcontrollers during IEC61000-4-5 Class 4 (42 Ω) events. |
Use Scenario: Safeguarding gate driver supply lines in variable-frequency motor drives exposed to inductive switching noise. IC Role / Device Role / Timing Role: Fast-acting transient suppressor on isolated 15 V auxiliary supply feeding IGBT gate drivers. Use Value: Clamps 8.3 ms half-sine surges up to 200 A forward surge current without degradation, preventing false turn-on of power switches. |
| Avionics Data Bus Interface | Ruggedized Railway Signaling |
Use Scenario: Shielding ARINC 429 receiver inputs from ESD and coupled transients in cockpit display systems. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed directly at connector entry point. Use Value: Sub-100 ps response prevents ESD pulses (IEC61000-4-2 ±15 kV contact) from damaging RS-422 receivers while maintaining signal integrity. |
Use Scenario: Hardening 110 V DC signaling circuits in train control modules against traction-induced surges and lightning coupling. IC Role / Device Role / Timing Role: Primary surge arrestor on track-side interface board power and data lines. Use Value: Withstands repeated 1500 W surges at –40 °C to +85 °C ambient, meeting EN 50121-3-2 immunity requirements for rolling stock electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5641A | No tape-and-reel packaging; leaded bulk format only | Lacks TR suffix; unsuitable for automated SMT placement but identical electrical specs | Select 1N5641A/TR when requiring reel-fed assembly; choose 1N5641A for manual prototyping or low-volume repair. |
| SMBJ18A | Surface-mount SMB package; lower 18 V VWM; 600 W PPP; plastic encapsulation | Not hermetic or radiation-hardened; limited to commercial-temperature industrial use | Choose SMBJ18A only for cost-sensitive, non-military PCBs where DO-13 footprint and reliability are not required. |
Compared with 1N5641A/TR, the 1N5641A offers identical electrical performance but lacks tape-and-reel convenience, while SMBJ18A trades hermeticity, radiation tolerance, and 1500 W surge capacity for surface-mount compatibility and lower cost - making 1N5641A/TR the sole choice for mission-critical, high-energy, high-reliability deployments.
Availability
1N5641A/TR is available at Aetrix Electronics and suitable for aerospace power distribution, industrial motor drive control, avionics data bus interface, and ruggedized railway signaling requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for 1N5641A/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 (including legacy Microsemi assets) is a global semiconductor provider specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5641A/TR belongs to Microchip's legacy high-power unidirectional TVS family, engineered specifically for military-grade surge protection in avionics, satellite subsystems, and safety-critical infrastructure where hermetic sealing and radiation tolerance are mandatory.
FAQ
What is the clamping voltage of the 1N5641A/TR under a 10/1000 µs surge?
The 1N5641A/TR has a maximum clamping voltage (VC) of 31.9 V when subjected to its rated 47 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and reflects worst-case voltage seen by protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1N5641A/TR suitable for IEC61000-4-5 secondary lightning protection?
Yes, the 1N5641A/TR is explicitly rated for IEC61000-4-5 secondary lightning protection up to Class 4 with 42 Ω source impedance, as confirmed in the official datasheet. Its 1500 W peak pulse power rating and 47 A IPP enable it to clamp standardized 4 kV/2 kA surge waveforms without failure, making it appropriate for telecom infrastructure, rail signaling, and avionics power entry points.
Does the 1N5641A/TR have radiation hardness certification?
Yes, the 1N5641A/TR is inherently radiation-hardened per Microsemi MicroNote 050, a documented qualification supporting total ionizing dose (TID) resilience in space and nuclear environments. This property stems from its DO-13 hermetic metal-glass construction and silicon process, not requiring additional screening - a key differentiator versus plastic-packaged alternatives.
What is the standoff voltage (VWM) of the 1N5641A/TR and why does it matter?
The 1N5641A/TR has a rated standoff voltage (VWM) of 17.8 V, meaning it remains non-conductive below this reverse voltage with leakage <5 µA. This parameter ensures the device does not load or interfere with normal 24 V DC system operation while still triggering reliably during transients exceeding ~19.8 V - establishing essential margin between operating rail and breakdown threshold.
How does the DO-13 package of the 1N5641A/TR improve reliability over plastic alternatives?
The DO-13 package of the 1N5641A/TR uses hermetically sealed metal and glass construction, eliminating moisture permeation, outgassing, and thermal delamination risks present in plastic packages. This enables stable long-term performance in vacuum, high-humidity, and wide-temperature cycling environments - verified by MIL-STD-750 solderability testing and extended lifetime under thermal shock conditions.
1N5641A/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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- 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
1N5641A/TR FAQ
1.How can I place an order for 1N5641A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5641A/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 1N5641A/TR reliable?
The price and inventory of 1N5641A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5641A/TR is usually 5 days.
3.What payment methods are accepted for 1N5641A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5641A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5641A/TR?
1N5641A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5641A/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 1N5641A/TR?
For technical support, including 1N5641A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5641A/TR requirements.
6.How does Aetrix verify that 1N5641A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5641A/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 1N5641A/TR meets industry standards.
7.What is the process for return or replacement of 1N5641A/TR?
All 1N5641A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5641A/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 1N5641A/TR part is unused and in its original packaging.
Return procedure for 1N5641A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5641A/TR Tags
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