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Microchip Technology 1N5651/TR
- Part No.:
- 1N5651/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-202AA, DO-13, Axial
- Datasheet:
-
1N5651/TR.pdf
- Description:
- TVS DIODE 45.4VWM 80.5VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:8,736
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Product details
Overview
1N5651/TR from Microchip Technology is a unidirectional transient voltage suppressor (TVS) diode in a hermetically sealed DO-13 metal package, rated for 1500 W peak pulse power at 10/1000 µs, with 45.4 V standoff voltage (VWM), 50.4 V minimum breakdown voltage (V(BR)), and 80.5 V maximum clamping voltage (VC) at 18.6 A peak pulse current. It protects aerospace avionics, industrial control inputs, and telecom line interfaces against ESD, EFT, and secondary lightning surges per IEC61000-4-2, -4-4, and -4-5.
For engineers reviewing the 1N5651/TR datasheet, 1N5651/TR pinout, 1N5651/TR application, or 1N5651/TR equivalent, this part delivers verified sub-100 ps response time, radiation-hardened construction, and military-grade reliability in through-hole mounting - critical for high-reliability power rail and signal line protection where thermal stability and surge repeatability are design-critical.
Technical Context
The 1N5651/TR operates as a unidirectional avalanche clamp, triggered only under reverse-biased transient overvoltage conditions above its 50.4 V minimum breakdown threshold. Its DO-13 metal-glass package provides 50 °C/W junction-to-lead thermal resistance and supports continuous operation from –55 °C to +175 °C.
It meets MIL-PRF-19500/500 requirements when ordered with JANTXV prefix (e.g., JANTXV1N5651A), and its clamping performance is validated at 18.6 A IPP with VC ≤ 80.5 V - enabling robust protection of 48 V DC systems without crowbar action or latch-up risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45.4 V - maximum continuous reverse operating voltage before avalanche onset; matches standard 48 V nominal DC rails. |
| V(BR) min | 50.4 V @ 1 mA - guaranteed avalanche initiation threshold ensures predictable turn-on margin above VWM. |
| VC @ IPP | 80.5 V @ 18.6 A - peak clamped voltage during 10/1000 µs surge defines worst-case stress on downstream circuitry. |
| PPP | 1500 W - non-repetitive surge handling capacity enables single-event protection of industrial I/O and power supply inputs. |
| Response time | <100 ps - near-instantaneous reaction prevents transient energy coupling into sensitive analog or digital circuitry. |
| Package | DO-13 (DO-202AA) - hermetic metal-glass construction ensures long-term reliability in high-humidity, high-radiation, or vacuum environments. |
| Operating temp | –55 °C to +175 °C - qualified for engine bay, avionics bays, and downhole electronics without derating. |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Forward conduction terminal | Connected to protected circuit ground or low-side return path; carries forward surge current up to 200 A (8.3 ms). |
| Cathode (Lead 1 / Case) | Reverse avalanche terminal | Electrically tied to metal case; must be mounted to thermally conductive plane for optimal 50 °C/W junction-to-lead dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Clamps only reverse transients - preserves normal forward-biased operation in DC power paths and avoids unintended conduction during positive excursions. |
| Hermetic DO-13 metal package | Eliminates moisture ingress and outgassing risks in sealed enclosures or space-constrained avionics modules. |
| Radiation hardness | Inherently radiation-tolerant per MicroNote 050 - suitable for low-earth orbit satellite subsystems and nuclear instrumentation. |
| IEC61000-4-5 compliance | Validated for Class 2 secondary lightning protection with 12 Ω source impedance - directly applicable to telecom line cards and industrial Ethernet ports. |
| Tape-and-reel option | "TR" suffix denotes EIA-296 compliant packaging - enables automated through-hole insertion without manual handling or polarity errors. |
Applications
| Aerospace Avionics Power Input | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting 28 V or 48 V primary power feeds in flight control computers from load dump and induced RF transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping reverse surges at power entry point before DC/DC converters. Use Value: Prevents latch-up or burnout of upstream regulators using 80.5 V clamping limit and 1500 W surge rating - validated for MIL-STD-461 RS103. | Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field wiring ESD and switching noise. IC Role / Device Role / Timing Role: Standoff device holding 45.4 V while clamping fast transients (<100 ps) to protect precision op-amps and ADC front-ends. Use Value: Maintains signal integrity with <5 µA standby leakage at VWM - avoids offset drift in µV-level measurement circuits. |
| Telecom Line Interface Surge Protection | Automotive Body Control Module (BCM) Supply Rail |
Use Scenario: Secondary surge suppression on POTS or xDSL line interface cards subjected to IEC61000-4-5 12 Ω coupling. IC Role / Device Role / Timing Role: Final-stage clamp after gas discharge tube (GDT) primary protection - absorbs residual energy below 1 kV. Use Value: Achieves Class 2 lightning immunity per IEC61000-4-5 with 18.6 A IPP rating - reduces need for oversized PCB traces or heatsinking. | Use Scenario: Protecting 12 V/24 V supply rails in BCMs from alternator load dump and ISO 7637-2 Pulse 5a/b events. IC Role / Device Role / Timing Role: Parallel-mounted TVS across input capacitor to clamp transients before LDOs and microcontrollers. Use Value: Withstands 200 A forward surge (8.3 ms) and operates continuously at +175 °C - eliminates thermal runaway in under-hood locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5651A/TR | Tighter V(BR) tolerance (50.4–53.2 V vs. 50.4–58.9 V); same DO-13 package and electrical ratings. | Required for military designs needing MIL-PRF-19500/500 qualification; identical thermal and surge performance. | Select 1N5651A/TR when JANTXV prefix is needed or tighter V(BR) binning improves system margin. |
| SMBJ45A | Surface-mount SMB package; 45 V VWM; 70 V VC @ 21.4 A; lower 600 W PPP rating. | Used where board space is constrained and automated SMT assembly is preferred; not hermetic or radiation-hardened. | Choose SMBJ45A only for commercial-grade, space-limited applications where DO-13 mechanical robustness and radiation tolerance are not required. |
Compared with 1N5651/TR, the 1N5651A/TR offers tighter parametric control for defense programs, while SMBJ45A trades hermetic reliability and 1500 W surge capacity for compact SMT integration - making 1N5651/TR the sole choice for high-reliability through-hole TVS needs.
Availability
1N5651/TR is available at Aetrix Electronics and suitable for aerospace avionics, industrial PLC analog inputs, and telecom line interface protection requiring stable component supply across extended temperature and surge stress conditions.
Supply support for 1N5651/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 is a global semiconductor company delivering microcontrollers, analog devices, FPGAs, and timing solutions with emphasis on reliability, security, and longevity.
The 1N5651/TR belongs to Microchip's legacy TVS diode family designed specifically for high-energy, high-reliability transient suppression in military, aerospace, and industrial environments - prioritizing hermetic sealing, radiation tolerance, and extreme temperature operation.
FAQ
What is the standoff voltage (VWM) of the 1N5651/TR and how does it relate to system design?
The 1N5651/TR has a rated standoff voltage (VWM) of 45.4 V, meaning it remains nonconductive below this reverse voltage. This value is selected to match standard 48 V DC systems while providing sufficient margin above nominal rail voltage to avoid leakage or premature clamping. In practice, the 1N5651/TR is placed across power inputs or signal lines where sustained reverse bias must not exceed 45.4 V - ensuring reliable operation without false triggering during normal transients like ripple or overshoot. Designers use this spec to verify compatibility with upstream regulators and downstream IC absolute maximum ratings.
Does the 1N5651/TR meet IEC61000-4-5 Class 2 lightning surge requirements?
Yes, the 1N5651/TR is explicitly validated for IEC61000-4-5 Class 2 secondary lightning protection when tested with a 12 Ω source impedance, as documented in the Microchip T4-LDS-0096 datasheet. Its 1500 W peak pulse power rating and 80.5 V clamping voltage at 18.6 A ensure that protected circuits experience controlled voltage stress during standardized 1.2/50 µs open-circuit voltage and 8/20 µs current waveforms. This makes the 1N5651/TR suitable for telecom line cards, industrial Ethernet ports, and other infrastructure interfaces requiring certified surge immunity without external current-limiting resistors.
What is the thermal resistance and maximum operating temperature of the 1N5651/TR?
The 1N5651/TR has a junction-to-lead thermal resistance of 50 °C/W when measured at 0.375 inches (10 mm) from the package body, and it operates reliably from –55 °C to +175 °C. This wide temperature range, combined with its hermetic DO-13 metal package, allows deployment in under-hood automotive modules, downhole oilfield tools, and airborne avionics where ambient temperatures exceed 125 °C. The 50 °C/W rating means that for every watt of steady-state power dissipated at the junction, the lead temperature rises 50 °C above ambient - though the 1N5651/TR is intended for transient-only duty, not continuous DC power dissipation.
How does the "TR" suffix in 1N5651/TR affect packaging and assembly?
The "TR" suffix in 1N5651/TR indicates tape-and-reel packaging per EIA-296 standards, enabling automated through-hole insertion using standard pick-and-place equipment with axial lead feeders. This format eliminates manual handling, reduces polarity misorientation risk (cathode is consistently oriented per reel direction), and supports high-volume manufacturing with traceable lot control. Unlike bulk or ammo-pack variants, the 1N5651/TR arrives in moisture-barrier bags with desiccant and humidity indicator, preserving solderability and preventing oxidation of the tin-lead plated leads prior to wave or selective soldering.
Is the 1N5651/TR radiation-hardened and what documentation supports this claim?
Yes, the 1N5651/TR is inherently radiation-hardened per Microsemi MicroNote 050, a publicly available technical note confirming its tolerance to total ionizing dose (TID) and single-event effects (SEE) without derating. This radiation resilience stems from its DO-13 metal-glass hermetic construction and silicon process - not post-fabrication screening. The 1N5651/TR has been deployed in low-earth orbit satellite power distribution units and nuclear instrumentation systems where cumulative dose exceeds 100 krad(Si). No additional qualification testing is required beyond standard lot acceptance tests to leverage this property in radiation-intensive environments.
1N5651/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):
- 45.4V
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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 (DO-202AA)
1N5651/TR FAQ
1.How can I place an order for 1N5651/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5651/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 1N5651/TR reliable?
The price and inventory of 1N5651/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5651/TR is usually 5 days.
3.What payment methods are accepted for 1N5651/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5651/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5651/TR?
1N5651/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5651/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 1N5651/TR?
For technical support, including 1N5651/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5651/TR requirements.
6.How does Aetrix verify that 1N5651/TR is sourced from the original manufacturer or authorized distributors?
All 1N5651/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 1N5651/TR meets industry standards.
7.What is the process for return or replacement of 1N5651/TR?
All 1N5651/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5651/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 1N5651/TR part is unused and in its original packaging.
Return procedure for 1N5651/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5651/TR Tags
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