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Microchip Technology 1N5631/TR
- Part No.:
- 1N5631/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-202AA, DO-13, Axial
- Datasheet:
-
1N5631/TR.pdf
- Description:
- TVS DIODE 6.63VWM 12.5VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:8,015
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Product details
Overview
1N5631/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 6.63 V rated standoff voltage (VWM), 7.38–7.79 V breakdown voltage (V(BR)) at 10 mA, 12.5 V maximum clamping voltage (VC) at 120 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the 1N5631/TR datasheet, 1N5631/TR pinout, 1N5631/TR application, or 1N5631/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 (IEC 61000-4-5) in harsh environments requiring radiation hardness and operation from –55°C to +175°C.
Technical Context
The 1N5631/TR operates as a unidirectional avalanche diode, entering controlled breakdown when transient voltage exceeds its V(BR) threshold to clamp downstream circuitry. Its response time is under 100 ps, enabling effective suppression of fast-rising ESD and switching transients.
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 110°C/W junction-to-ambient on FR4. The cathode is internally connected to the metal case, enforcing polarity-aware mounting and grounding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.63 V - Maximum continuous reverse operating voltage before conduction begins; sets minimum system voltage margin for reliable standby isolation. |
| V(BR) @ I(BR) | 7.38–7.79 V @ 10 mA - Measured avalanche onset range; defines precise triggering threshold for transient clamping. |
| VC @ IPP | 12.5 V @ 120 A - Peak clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected ICs or circuits. |
| PPP | 1500 W - Peak pulse power handling capability; enables robust protection against high-energy inductive switch-offs and lightning-induced surges. |
| Response Time | <100 ps - Near-instantaneous turn-on; ensures suppression before sensitive components experience damaging overvoltage. |
| Operating Temp | –55°C to +175°C - Extended thermal range supports deployment in engine bays, avionics bays, and downhole equipment without derating. |
| Package | DO-13 (DO-202AA) - Hermetic metal-glass construction provides superior moisture resistance, radiation hardness, and long-term reliability vs. plastic packages. |
Pinout & Package
DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads; cathode terminal electrically bonded to case and marked by diode symbol on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Transient current entry point | Connected to protected line; conducts surge current into cathode/case during avalanche event. |
| Cathode (Lead 1 / Case) | Clamp reference & ground path | Internally tied to metal case; must be soldered to low-impedance chassis or system ground plane for effective energy dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Enables DC-biased line protection (e.g., +12 V power rails) without forward-conduction leakage during normal operation. |
| Hermetic DO-13 metal package | Provides MIL-PRF-19500-compliant reliability, zero moisture ingress risk, and inherent radiation hardness per MicroNote 050. |
| 1500 W peak pulse power | Supports Class 4 secondary lightning protection per IEC 61000-4-5 (2 Ω source) and full IEC 61000-4-2 ±30 kV contact discharge compliance. |
| Cathode-to-case construction | Reduces parasitic inductance and ensures consistent grounding path-critical for sub-nanosecond transient response and repeatable clamping performance. |
| Tape-and-reel packaging (TR suffix) | Enables automated through-hole insertion with EIA-296 standard carrier tape, supporting high-volume industrial and defense manufacturing. |
Applications
| Aerospace Power Distribution | Avionics Data Bus Protection |
|---|---|
Use Scenario: Protecting 28 V DC power feeds in aircraft flight control computers from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed at board-level input filter stage. Use Value: Limits transient excursions to ≤12.5 V during 120 A surges, preserving integrity of downstream DC-DC converters and microcontrollers rated for 16 V absolute max. |
Use Scenario: Shielding ARINC 429 receivers from ESD events induced on long harness runs inside airframes. IC Role / Device Role / Timing Role: Line-side transient suppressor on differential data lines referenced to chassis ground. Use Value: Sub-100 ps response prevents bit errors during ±15 kV contact ESD, maintaining data link uptime per DO-160 Section 22 requirements. |
| Industrial Motor Drive Controls | Military Vehicle Electronics |
Use Scenario: Safeguarding PLC I/O modules connected to solenoid valves and relay coils subject to 200 A 8.3 ms surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V supply inputs with direct case-to-chassis thermal path. Use Value: Handles repetitive 1500 W pulses without degradation, meeting IEC 61000-4-4 Level 4 (4 kV EFT) immunity requirements. |
Use Scenario: Hardening 12 V vehicle battery interfaces in armored vehicles exposed to EMP and lightning coupling. IC Role / Device Role / Timing Role: Hermetic TVS mounted directly to grounded metal enclosure wall. Use Value: Radiation-hardened DO-13 package sustains operation after 100 krad(Si) exposure while delivering 1500 W clamping per MIL-STD-461G CS115. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5631A/TR | Narrower V(BR) tolerance (7.38–7.79 V → 7.79 V min only); tighter VWM match (6.63 V → 7.02 V). | Preferred where precise clamping threshold and reduced standby leakage (<200 µA vs. 200 µA) are required in low-power sensor nodes. | Select 1N5631A/TR when tighter parametric control justifies minor cost premium and higher VWM is acceptable. |
| SMBJ6.5A/TR | Surface-mount SMB package; lower PPP (600 W); higher VC (11.2 V @ 53.3 A); plastic encapsulation. | Suitable for commercial-grade PCBs with space constraints but lacks hermeticity, radiation hardness, and military qualification. | Choose SMBJ6.5A/TR only for cost-sensitive, non-military designs where DO-13 footprint and MIL-PRF-19500 compliance are not mandatory. |
Compared with 1N5631/TR, the 1N5631A/TR offers tighter electrical tolerances for precision clamping, while the SMBJ6.5A/TR trades hermetic reliability and 2.5× pulse power for SMT compatibility-making the 1N5631/TR the sole choice for high-reliability through-hole surge protection in aerospace and defense platforms.
Availability
1N5631/TR is available at Aetrix Electronics and suitable for aerospace power distribution, avionics data bus protection, and industrial motor drive controls requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5631/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 global semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5631/TR belongs to Microchip's legacy JAN/JANTXV-qualified TVS diode family, engineered specifically for mission-critical surge protection where hermetic sealing, extreme temperature operation, and IEC/MIL-standard compliance are non-negotiable.
FAQ
What is the clamping voltage of the 1N5631/TR under a 10/1000 µs surge?
The 1N5631/TR exhibits a maximum clamping voltage (VC) of 12.5 V when subjected to a 120 A peak pulse current with a 10/1000 µs waveform. This value is guaranteed across temperature and represents the highest voltage seen across the device during standardized surge testing-critical for verifying safe operating margins of downstream ICs.
Is the 1N5631/TR suitable for IEC 61000-4-5 secondary lightning protection?
Yes, the 1N5631/TR is explicitly rated for IEC 61000-4-5 secondary lightning protection up to Class 4 with 2 Ω source impedance (covers 1N5629 to 1N5636A per datasheet). Its 1500 W peak pulse power and sub-100 ps response ensure effective energy diversion during multi-kA surge events typical of coupled lightning transients in avionics and vehicle systems.
Does the "TR" suffix on 1N5631/TR indicate tape-and-reel packaging?
Yes, the "TR" suffix denotes EIA-296 standard tape-and-reel packaging for automated through-hole insertion. Each reel contains factory-verified 1N5631/TR units in hermetic DO-13 metal cases, with orientation and polarity preserved for consistent placement-essential for high-yield manufacturing of defense and aerospace assemblies.
How does the DO-13 package of the 1N5631/TR improve reliability versus plastic TVS diodes?
The DO-13 package of the 1N5631/TR uses welded metal-glass hermetic sealing to eliminate moisture ingress, prevent corrosion, and withstand thermal cycling from –55°C to +175°C. Unlike plastic packages, it delivers proven radiation hardness (per MicroNote 050) and long-term parameter stability-key for 20+ year deployments in satellites and military platforms.
What is the standoff voltage (VWM) rating of the 1N5631/TR, and why is it important?
The 1N5631/TR has a rated standoff voltage (VWM) of 6.63 V, meaning it remains non-conductive below this reverse voltage during normal operation. This value ensures minimal leakage current (<200 µA) while providing sufficient margin above typical 5 V logic or sensor supply rails-preventing false triggering and enabling clean DC biasing in protected circuits.
1N5631/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-202AA, DO-13, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.63V
- Voltage - Breakdown (Min):
- 7.38V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 120A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-13 (DO-202AA)
1N5631/TR FAQ
1.How can I place an order for 1N5631/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5631/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 1N5631/TR reliable?
The price and inventory of 1N5631/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5631/TR is usually 5 days.
3.What payment methods are accepted for 1N5631/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5631/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5631/TR?
1N5631/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5631/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 1N5631/TR?
For technical support, including 1N5631/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5631/TR requirements.
6.How does Aetrix verify that 1N5631/TR is sourced from the original manufacturer or authorized distributors?
All 1N5631/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 1N5631/TR meets industry standards.
7.What is the process for return or replacement of 1N5631/TR?
All 1N5631/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5631/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 1N5631/TR part is unused and in its original packaging.
Return procedure for 1N5631/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5631/TR Tags
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