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Microchip Technology 1N5649A/TR
- Part No.:
- 1N5649A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5649A/TR.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:3,940
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Product details
Overview
1N5649A/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 38.1 V rated standoff voltage (VWM), 42.3 V minimum breakdown voltage (V(BR)), 67.8 V maximum clamping voltage (VC) at 22.2 A peak pulse current (IPP), and 1500 W peak pulse power rating at 10/1000 µs waveform.
For engineers reviewing the 1N5649A/TR datasheet, 1N5649A/TR pinout, 1N5649A/TR application, or 1N5649A/TR equivalent, this device is selected for secondary lightning protection per IEC61000-4-5 (42 Ω, Class 4), ESD/EFT immunity per IEC61000-4-2/-4, and fast-clamp (<100 ps) protection of DC power rails and signal lines in harsh electromagnetic environments.
Technical Context
The 1N5649A/TR operates as a unidirectional avalanche diode, entering controlled breakdown above its 38.1 V standoff voltage to clamp transients while maintaining low leakage (<5 µA at VWM). Its DO-13 metal-glass package provides hermetic sealing and inherent radiation hardness per MicroNote 050, supporting operation from –55°C to +175°C.
It delivers 1500 W non-repetitive peak pulse power with thermal resistance of 50°C/W junction-to-lead, enabling robust surge handling without thermal runaway under defined pulse conditions. The cathode is internally connected to the case, requiring proper grounding in PCB layout to ensure effective clamping path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 38.1 V - Maximum continuous reverse voltage before conduction; sets operating rail compatibility for 36 V nominal systems. |
| V(BR) @ I(BR) | 42.3–44.7 V @ 1 mA - Breakdown onset range; ensures reliable triggering above normal operating voltage with margin. |
| VC @ IPP | 67.8 V @ 22.2 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected circuitry. |
| PPP | 1500 W - Peak pulse power handling capability; supports high-energy transients like inductive switch-off or lightning-induced surges. |
| Response Time | <100 ps - Enables effective suppression of ESD (IEC61000-4-2) and fast EFT bursts (IEC61000-4-4). |
| Operating Temp | –55°C to +175°C - Supports deployment in extended-temperature avionics, downhole, and engine-control environments. |
| Package | DO-13 (DO-202AA) - Hermetically sealed metal-glass case with cathode-to-case polarity; enables high-reliability, long-life mounting. |
Pinout & Package
DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads; cathode terminal electrically bonded to case and marked with diode symbol on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Transient current entry point | Connected to line/rail being protected; carries full surge current into device during clamping. |
| Cathode (Lead 1 / Case) | Clamping reference & return path | Internally tied to metal case; must be solidly grounded to low-inductance earth or chassis plane for effective clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Protects DC-biased lines only in reverse direction; avoids forward-conduction interference on powered rails. |
| Hermetic DO-13 metal package | Eliminates moisture ingress and outgassing risks; certified for aerospace and military use per MIL-PRF-19500/500. |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay/contact bounce, motor commutation, and secondary lightning coupling. |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050; suitable for space-qualified and nuclear instrumentation applications. |
| Tape-and-reel packaging (TR suffix) | Enables automated through-hole assembly; standard EIA-296 compliant for production line integration. |
Applications
| Aerospace Avionics Power Protection | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting 28 V DC power distribution buses in aircraft flight control computers from induced RF and switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient overvoltage on primary power input rail. Use Value: Limits bus overvoltage to ≤67.8 V during 22.2 A surges, preventing latch-up or damage to downstream DC-DC converters and FPGAs. |
Use Scenario: Safeguarding gate-drive signals and feedback sensors in variable-frequency motor drives exposed to inductive kickback. IC Role / Device Role / Timing Role: Fast-response clamping element on isolated 15 V auxiliary supply rails feeding IGBT drivers. Use Value: Sub-100 ps response prevents gate oxide stress from nanosecond-scale voltage spikes generated by stray inductance. |
| Military Vehicle Electronics | Energy Metering & Smart Grid Sensors |
|
Use Scenario: Securing 24 V CAN and RS-485 communication interfaces in armored vehicle command modules against ESD and EMP-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed at connector entry point to shunt transients before interface ICs. Use Value: 38.1 V VWM matches 24 V system headroom; 1500 W rating withstands MIL-STD-461 CS115 pulses without degradation. |
Use Scenario: Protecting voltage/current sensing inputs of utility-grade electricity meters installed on outdoor distribution panels. IC Role / Device Role / Timing Role: Secondary lightning protection device per IEC61000-4-5 Class 4 (42 Ω source impedance). Use Value: Certified clamping performance up to 67.8 V ensures meter ADC front-end remains within safe input range during 4 kV surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5649A | No tape-and-reel packaging; bulk or ammo-pack only; identical electrical specs and DO-13 package. | Not suitable for automated through-hole assembly; requires manual or vibratory bowl feeding. | Select 1N5649A/TR when high-volume SMT-line-compatible reel delivery is required for production throughput. |
| SMBJ36A | Surface-mount SMB package; 36 V VWM; 58.1 V VC @ 23.5 A; lower 600 W PPP rating. | Better suited for space-constrained PCBs but lacks hermetic seal and radiation hardness. | Choose SMBJ36A only for commercial-grade, non-military applications where board area and cost outweigh reliability requirements. |
Compared with 1N5649A/TR, the 1N5649A lacks reel packaging for automation, while SMBJ36A trades hermeticity, temperature range, and pulse power for surface-mount convenience-making 1N5649A/TR the sole choice for mission-critical, high-surge, extended-temperature deployments.
Availability
1N5649A/TR is available at Aetrix Electronics and suitable for aerospace avionics, military vehicle electronics, and industrial motor drive applications requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for 1N5649A/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 1N5649A/TR belongs to Microchip's legacy JAN/JANTXV-qualified TVS diode family, engineered specifically for military and avionics surge protection where hermeticity, temperature resilience, and IEC/MIL-standard compliance are mandatory.
FAQ
What is the standoff voltage (VWM) of the 1N5649A/TR?
The 1N5649A/TR has a rated standoff voltage (VWM) of 38.1 V, meaning it remains nonconductive under continuous reverse bias up to this level. This value is selected to match 36 V nominal DC systems with sufficient margin to avoid false triggering during normal operation while ensuring reliable clamping during transients exceeding this threshold.
Does the 1N5649A/TR meet IEC61000-4-5 Class 4 lightning surge requirements?
Yes, the 1N5649A/TR is explicitly rated for IEC61000-4-5 Class 4 secondary lightning protection with a 42 Ω source impedance, as confirmed in the manufacturer's technical data sheet. Its 67.8 V clamping voltage at 22.2 A ensures protected circuits remain within safe operating limits during standardized 4 kV surge testing.
Is the 1N5649A/TR suitable for high-temperature environments such as engine control units?
Yes, the 1N5649A/TR is rated for operation from –55°C to +175°C and uses a hermetically sealed DO-13 metal package, making it appropriate for under-hood automotive ECUs, turbine monitoring systems, and other high-temperature industrial applications where plastic-packaged alternatives would degrade.
What does the "TR" suffix indicate in 1N5649A/TR?
"TR" denotes tape-and-reel packaging per EIA-296 standards, enabling automated through-hole insertion during high-volume manufacturing. The 1N5649A/TR retains identical electrical and mechanical specifications as the bulk 1N5649A, with the sole difference being packaging format for production line compatibility.
How is the cathode terminal identified on the 1N5649A/TR DO-13 package?
The cathode of the 1N5649A/TR is marked by a diode symbol on the glass body and is electrically connected to the metal case. Lead 1 (cathode) must be soldered to a low-inductance ground plane or chassis to complete the clamping path-this configuration is critical for achieving specified 67.8 V clamping performance.
1N5649A/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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 23.2A
- 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
1N5649A/TR FAQ
1.How can I place an order for 1N5649A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5649A/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 1N5649A/TR reliable?
The price and inventory of 1N5649A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5649A/TR is usually 5 days.
3.What payment methods are accepted for 1N5649A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5649A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5649A/TR?
1N5649A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5649A/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 1N5649A/TR?
For technical support, including 1N5649A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5649A/TR requirements.
6.How does Aetrix verify that 1N5649A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5649A/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 1N5649A/TR meets industry standards.
7.What is the process for return or replacement of 1N5649A/TR?
All 1N5649A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5649A/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 1N5649A/TR part is unused and in its original packaging.
Return procedure for 1N5649A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5649A/TR Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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