My Inquiry
My Account
Microchip Technology 1N5645A/TR
- Part No.:
- 1N5645A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5645A/TR.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:8,918
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5645A/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. It features a 29.7 V minimum breakdown voltage (VBR), 26.8 V rated standoff voltage (VWM), and clamps transients to ≤47.7 V at 31.5 A peak pulse current (IPP) under 10/1000 µs waveform - delivering 1500 W peak pulse power for IEC 61000-4-5 secondary lightning and IEC 61000-4-2 ESD protection in avionics and industrial control systems.
For engineers reviewing the 1N5645A/TR datasheet, 1N5645A/TR pinout, 1N5645A/TR application, or 1N5645A/TR equivalent, this device serves as a military-grade, through-hole TVS with verified 100 ps response time, hermetic DO-13 packaging, and JAN/JANTXV qualification eligibility - critical for designs requiring radiation hardness, extended temperature operation (–55°C to +175°C), and stable clamping performance across surge repetition rates ≤0.01%.
Technical Context
The 1N5645A/TR operates as a unidirectional avalanche diode, entering controlled breakdown when reverse voltage exceeds its 29.7–36.3 V VBR range at 1 mA test current. Its clamping action limits transient-induced voltage to 47.7 V maximum at 31.5 A, enabling robust protection of downstream circuitry without latch-up or thermal runaway.
Designed for low-inductance, high-power pulse handling, it leverages a welded metal-glass DO-13 package with cathode-to-case polarity and tin-lead plating per MIL-STD-750. Thermal resistance is 50°C/W junction-to-lead (0.375" from body), supporting reliable operation under repetitive surge conditions when mounted with appropriate copper land patterns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.8 V - Maximum continuous reverse operating voltage before leakage exceeds 5 µA; sets upper limit for protected line DC bias. |
| VBR @ IBR | 29.7–36.3 V @ 1 mA - Breakdown voltage window defining turn-on threshold; ensures consistent avalanche initiation across temperature and unit variance. |
| VC @ IPP | 47.7 V @ 31.5 A - Maximum clamped voltage during 10/1000 µs surge; determines worst-case overvoltage seen by protected ICs or sensors. |
| PPP | 1500 W - Peak pulse power rating at TL = 25°C; defines single-event energy-handling capability without degradation. |
| Response Time | <100 ps - Time from transient onset to clamping onset; enables effective suppression of ESD (IEC 61000-4-2) and fast EFT bursts. |
| Operating Temp | –55°C to +175°C - Full military-grade temperature range; supports deployment in engine bays, avionics bays, and downhole equipment. |
| Package | DO-13 (DO-202AA) - Hermetically sealed metal-glass case with cathode connected to case; provides superior moisture resistance and long-term reliability vs. plastic packages. |
Pinout & Package
Package: DO-13 (DO-202AA), hermetically sealed metal-glass case with cathode electrically connected to the case and marked by a diode symbol on the body. Lead finish: tin-lead per MIL-STD-750 Method 2026. Weight: 1.4 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Forward conduction terminal | Connected to protected circuit's signal or power line; reverse-biased during normal operation. |
| Cathode (Lead 1 / Case) | Clamping reference terminal | Internally tied to metal case; must be connected to system ground or low-impedance return path for effective transient shunting. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Enables precise protection of DC-biased lines (e.g., 24 V sensor supplies) without forward conduction during normal operation. |
| 1500 W peak pulse power (10/1000 µs) | Supports Class 4 secondary lightning protection per IEC 61000-4-5 with 2 Ω source impedance, covering demanding industrial surge requirements. |
| Hermetic DO-13 metal package | Eliminates moisture ingress and outgassing risks; certified for aerospace and high-reliability applications where plastic packages fail prematurely. |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - validated for use in space-qualified avionics and nuclear instrumentation systems. |
| JAN/JANTXV qualification path | "A" suffix enables military qualification (MIL-PRF-19500/500) with tighter tolerances; prefix options include JANTXV1N5645A for flight-critical designs. |
Applications
| Aerospace Avionics Power Protection | Industrial Motor Drive Control Signals |
|---|---|
Use Scenario: Protecting 28 V DC power rails and discrete sensor inputs in airborne navigation computers exposed to induced RF and secondary lightning surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed directly at connector entry point to divert >1 kA transients away from ASICs and FPGAs. Use Value: Prevents latch-up and permanent damage in MIL-STD-704-compliant systems while maintaining <100 ps response for ESD events up to ±15 kV contact discharge. |
Use Scenario: Safeguarding isolated encoder feedback lines and gate driver enable signals in variable-frequency motor drives subject to inductive switching transients. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 26.8 V) placed across differential RS-422 lines to clamp common-mode spikes before they reach isolators. Use Value: Ensures uninterrupted position feedback during 400 V bus switching by limiting clamped voltage to 47.7 V - well below receiver input absolute maximum ratings. |
| Military Vehicle Communication Buses | Downhole Oilfield Instrumentation |
Use Scenario: Hardening CAN and MIL-STD-1553 data lines in armored vehicle electronics against EMP and load-dump transients in harsh electromagnetic environments. IC Role / Device Role / Timing Role: Through-hole TVS mounted at backplane connectors to absorb 1500 W pulses without PCB trace vaporization. Use Value: Maintains data integrity during 10/1000 µs surges up to 31.5 A while operating continuously from –55°C to +125°C ambient - meeting MIL-STD-810G thermal shock requirements. |
Use Scenario: Protecting pressure and temperature sensor front-ends in subsea drilling tools exposed to high-temperature, high-humidity, and ESD-prone environments. IC Role / Device Role / Timing Role: Hermetic DO-13 package prevents corrosion and parameter drift in 175°C downhole electronics; clamps transients induced by piezoelectric sensor charge injection. Use Value: Delivers stable 26.8 V standoff and 47.7 V clamping over full temperature range - eliminating field failures caused by plastic-package delamination or moisture absorption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5645A (bulk) | Identical electrical specs and DO-13 package; differs only in packaging format (bulk vs. tape-and-reel). | No functional difference; bulk version lacks EIA-296 tape/reel compliance and automated placement support. | Select 1N5645A/TR when using pick-and-place assembly; choose bulk 1N5645A for manual prototyping or low-volume repair. |
| SMCJ28A | Surface-mount SMC package; 28 V VWM, 43.5 V VC @ 34.5 A; same 1500 W rating but lower thermal resistance (junction-to-ambient). | Requires PCB redesign for SMD footprint; unsuitable for through-hole legacy boards or high-vibration mechanical retention needs. | Choose SMCJ28A only when board space is constrained and reflow soldering is available; retain 1N5645A/TR for mechanical robustness and hermetic reliability. |
Compared with 1N5645A/TR, the bulk 1N5645A offers identical protection performance but no tape-and-reel automation compatibility, while SMCJ28A trades hermetic sealing and vibration resistance for smaller footprint and higher thermal efficiency - making 1N5645A/TR the optimal choice for mission-critical through-hole deployments.
Availability
1N5645A/TR is available at Aetrix Electronics and suitable for aerospace avionics, industrial motor drives, military vehicle communications, and downhole oilfield instrumentation requiring stable component supply, long-term obsolescence management, and traceable military-grade sourcing.
Supply support for 1N5645A/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 1N5645A/TR belongs to Microchip's legacy TVS diode family engineered for extreme environmental resilience - specifically targeting applications where hermetic sealing, wide temperature operation, and IEC/MIL-standard surge compliance are non-negotiable design requirements.
FAQ
What is the standoff voltage (VWM) of the 1N5645A/TR?
The 1N5645A/TR has a rated standoff voltage (VWM) of 26.8 V, meaning it remains nonconductive under continuous reverse bias up to this level while drawing ≤5 µA standby current. This value is selected to match nominal 24 V DC systems with margin for ripple and tolerance, ensuring reliable protection without false triggering during normal operation.
Does the 1N5645A/TR meet IEC 61000-4-5 for secondary lightning protection?
Yes, the 1N5645A/TR is validated for Class 4 secondary lightning protection per IEC 61000-4-5 with 2 Ω source impedance, supporting peak pulse currents up to 31.5 A. Its 1500 W rating and sub-100 ps response ensure effective clamping of 4 kV surge waveforms commonly encountered in industrial and transportation infrastructure.
Is the 1N5645A/TR hermetically sealed, and why does that matter?
Yes, the 1N5645A/TR uses a welded DO-13 metal-glass hermetic package. This eliminates moisture permeation and internal corrosion - critical for long-term reliability in high-humidity, high-temperature, or vacuum environments such as avionics bays and downhole tools where plastic-packaged TVS devices degrade unpredictably.
Can the 1N5645A/TR be used for ESD protection per IEC 61000-4-2?
Yes, the 1N5645A/TR clamps transients in less than 100 picoseconds and handles ±15 kV contact discharge per IEC 61000-4-2. Its low dynamic impedance and fast response make it suitable for protecting sensitive inputs like RS-422 receivers, ADC references, and microcontroller GPIOs in ruggedized equipment.
What is the maximum operating temperature for the 1N5645A/TR?
The 1N5645A/TR operates from –55°C to +175°C, with derated power dissipation above +125°C. This full military-grade temperature range enables deployment in engine compartments, turbine control cabinets, and oilfield downhole tools where conventional TVS diodes fail due to thermal stress or parameter shift.
1N5645A/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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 33A
- 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
1N5645A/TR FAQ
1.How can I place an order for 1N5645A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5645A/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 1N5645A/TR reliable?
The price and inventory of 1N5645A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5645A/TR is usually 5 days.
3.What payment methods are accepted for 1N5645A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5645A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5645A/TR?
1N5645A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5645A/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 1N5645A/TR?
For technical support, including 1N5645A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5645A/TR requirements.
6.How does Aetrix verify that 1N5645A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5645A/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 1N5645A/TR meets industry standards.
7.What is the process for return or replacement of 1N5645A/TR?
All 1N5645A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5645A/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 1N5645A/TR part is unused and in its original packaging.
Return procedure for 1N5645A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5645A/TR Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
