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Microchip Technology 1N5631A/TR
- Part No.:
- 1N5631A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5631A/TR.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:7,899
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Product details
Overview
1N5631A/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 7.38 V minimum breakdown voltage (VBR), 6.63 V rated standoff voltage (VWM), and clamps transients to ≤12.5 V at 120 A peak pulse current (IPP) with 1500 W peak pulse power (10/1000 µs).
For engineers reviewing the 1N5631A/TR datasheet, 1N5631A/TR pinout, 1N5631A/TR application, or 1N5631A/TR equivalent, this device is selected for ESD/EFT protection per IEC 61000-4-2/4-4, secondary lightning suppression per IEC 61000-4-5 (up to Class 4 with 2 Ω source impedance), and inductive switching transient suppression in avionics power rails and sensor interfaces.
Technical Context
The 1N5631A/TR operates as a unidirectional avalanche diode, entering controlled breakdown when reverse voltage exceeds its VWM of 6.63 V, limiting transient energy via low-clamping-voltage response (<12.5 V at 120 A). Its <100 ps response time ensures protection against ESD events before system-level damage occurs.
Rated for -55°C to +175°C operation and hermetically sealed in DO-13, it delivers radiation hardness per MicroNote 050 and supports military-grade reliability when specified with JAN/JANTX/JANTXV prefixes. Thermal resistance is 50°C/W junction-to-lead (0.375" from body), enabling robust thermal management in high-temperature environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Rated Standoff Voltage) | 6.63 V - Maximum continuous reverse operating voltage before conduction begins; sets minimum system rail compatibility. |
| VBR (Breakdown Voltage @ 10 mA) | 7.38–9.02 V - Confirmed avalanche onset range; ensures predictable triggering above nominal supply levels. |
| VC (Clamping Voltage @ 120 A) | ≤12.5 V - Peak voltage seen by protected circuit during 10/1000 µs surge; defines maximum stress on downstream ICs. |
| IPP (Peak Pulse Current) | 120 A - Maximum transient current handled without failure; validates suitability for IEC 61000-4-5 Class 4 (2 Ω source). |
| PPP (Peak Pulse Power) | 1500 W - Energy-handling capacity for standardized 10/1000 µs waveform; enables single-device protection for moderate-surge nodes. |
| TJ Operating Range | -55°C to +175°C - Full military temperature coverage; supports engine bay, avionics, and downhole electronics deployment. |
| Package | DO-13 (DO-202AA) - Hermetic metal-glass construction; provides superior moisture resistance and long-term reliability vs. plastic packages. |
Pinout & Package
DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads; cathode connected to case and marked by diode symbol on body. Weight: 1.4 g. Lead finish: Tin-Lead per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Forward current path / Surge return node | Connected to ground or low-impedance return path; carries full transient current during clamping. |
| Cathode (Lead 1 / Case) | Protected line connection / High-side clamp node | Electrically tied to metal case; must be soldered to PCB ground plane or chassis for optimal thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection for IEC 61000-4-5 Level 4 surges without parallel staging or derating. |
| <100 ps response time | Prevents ESD-induced latch-up or gate oxide rupture in CMOS interfaces before protection ICs can react. |
| Hermetic DO-13 metal package | Eliminates moisture ingress risk in high-humidity or sealed avionics enclosures; extends field life beyond plastic alternatives. |
| Radiation-hardened per MicroNote 050 | Validated for total ionizing dose (TID) tolerance in airborne and space-qualified platforms without derating. |
| MIL-PRF-19500/500 qualified variants | Supports JANTXV1N5631A procurement for defense programs requiring traceable screening and lot-level test reports. |
Applications
| Aerospace Power Distribution | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protection of 28 V DC bus inputs in aircraft flight control actuators exposed to inductive kickback and lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed directly at connector entry point to shunt transients to chassis ground. Use Value: Withstands 120 A surges per IEC 61000-4-5 (2 Ω source) while clamping to ≤12.5 V, preserving integrity of downstream DC-DC converters and FPGAs. |
Use Scenario: Input protection for PLC digital I/O modules interfacing with 24 V solenoid drivers subject to repetitive inductive switching noise. IC Role / Device Role / Timing Role: Standoff voltage-matched (6.63 V) TVS on signal lines to prevent false triggering and latch-up in optocoupler input stages. Use Value: Sub-100 ps response prevents nanosecond-scale transients from propagating into logic circuits, reducing diagnostic false alarms and field returns. |
| Avionics Sensor Interfaces | Military Vehicle Data Buses |
|
Use Scenario: ESD protection on ARINC 429 receiver inputs in inertial measurement units (IMUs) deployed in fighter jet cockpits. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on differential data lines, referenced to isolated analog ground. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) to <12.5 V without signal distortion, maintaining bit error rate (BER) compliance over full temperature range. |
Use Scenario: Secondary lightning protection on CAN bus physical layer in armored vehicle command-and-control subsystems. IC Role / Device Role / Timing Role: Standoff-matched TVS on CAN_H/CAN_L lines upstream of transceiver, grounded to vehicle chassis. Use Value: Handles 1500 W surges while maintaining VC below transceiver absolute maximum ratings, eliminating need for external series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ7.0A | Surface-mount SMC package; 7.0 V VWM, 12.5 V VC @ 122 A; same PPP but lower thermal resistance (junction-to-ambient). | Requires PCB redesign for SMT layout; better suited for high-volume automated assembly but lacks hermetic sealing. | Select when board space is constrained and moisture resistance is less critical than cost or assembly efficiency. |
| 1N5631 | Commercial-grade version; identical electrical specs but no MIL-PRF-19500/500 qualification or radiation hardening data. | Approved for non-military industrial use only; not acceptable for DO-178B or MIL-HDBK-217F reliability modeling. | Select only for cost-sensitive commercial designs where extended temperature range and radiation tolerance are not required. |
Compared with SMCJ7.0A, the 1N5631A/TR offers superior environmental ruggedness and military traceability but requires through-hole assembly; compared with 1N5631, it adds verified radiation hardness and screened lot documentation essential for aerospace prime contracts.
Availability
1N5631A/TR is available at Aetrix Electronics and suitable for aerospace power distribution, industrial motor drive control, avionics sensor interfaces, and military vehicle data buses requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5631A/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 acquired Microsemi in 2018 and now manages its high-reliability analog and discrete portfolio, including radiation-hardened and military-qualified components.
The 1N5631A/TR belongs to Microchip's legacy TVS diode family designed specifically for mission-critical surge protection in aerospace, defense, and industrial systems where hermeticity, temperature resilience, and ESD immunity are non-negotiable.
FAQ
What is the standoff voltage rating of the 1N5631A/TR?
The 1N5631A/TR has a rated standoff voltage (VWM) of 6.63 V, meaning it remains nonconductive under continuous reverse bias up to this level. This value is selected to match nominal 5 V or 6 V logic/system rails while providing margin against ripple and tolerance drift. Exceeding VWM risks leakage current increase and premature clamping in normal operation.
Does the 1N5631A/TR meet IEC 61000-4-2 and IEC 61000-4-4 standards?
Yes, the 1N5631A/TR is explicitly validated for ESD protection per IEC 61000-4-2 and electrical fast transient (EFT) immunity per IEC 61000-4-4 due to its sub-100 ps response time and low clamping voltage. Its design ensures transient energy is shunted before sensitive interfaces experience overstress, making it suitable for avionics and industrial control applications requiring compliance certification.
Is the 1N5631A/TR hermetically sealed, and why does that matter?
Yes, the 1N5631A/TR uses a DO-13 hermetically sealed metal-glass package. This eliminates moisture permeation and prevents internal corrosion over decades of field operation-critical for avionics, downhole tools, and sealed military enclosures where plastic-packaged TVS diodes would degrade under thermal cycling and humidity.
Can the 1N5631A/TR be used for IEC 61000-4-5 secondary lightning protection?
Yes, the 1N5631A/TR is rated for IEC 61000-4-5 secondary lightning protection up to Class 4 with a 2 Ω source impedance, supporting peak currents of 120 A. Its 1500 W pulse power rating and 12.5 V clamping voltage ensure downstream circuitry remains within safe operating limits during standardized surge waveforms.
What is the thermal resistance specification for the 1N5631A/TR?
The 1N5631A/TR has a junction-to-lead thermal resistance (RθJL) of 50°C/W when measured at 0.375 inches (10 mm) from the case body. This allows effective heat dissipation into the PCB copper pour or chassis, supporting reliable operation at +175°C ambient-essential for engine control units and high-temperature avionics bays.
1N5631A/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):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 124A
- 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
1N5631A/TR FAQ
1.How can I place an order for 1N5631A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5631A/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 1N5631A/TR reliable?
The price and inventory of 1N5631A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5631A/TR is usually 5 days.
3.What payment methods are accepted for 1N5631A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5631A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5631A/TR?
1N5631A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5631A/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 1N5631A/TR?
For technical support, including 1N5631A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5631A/TR requirements.
6.How does Aetrix verify that 1N5631A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5631A/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 1N5631A/TR meets industry standards.
7.What is the process for return or replacement of 1N5631A/TR?
All 1N5631A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5631A/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 1N5631A/TR part is unused and in its original packaging.
Return procedure for 1N5631A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5631A/TR Tags
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