My Inquiry
My Account
Microchip Technology 1N5641A
- Part No.:
- 1N5641A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5641A.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:7,660
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5641A from Microchip Technology is a unidirectional transient voltage suppressor (TVS) diode in a hermetically sealed DO-13 metal package, designed for high-energy surge protection in aerospace, avionics, and industrial control systems. It features a 19.8 V minimum breakdown voltage (VBR), 17.8 V rated standoff voltage (VWM), 31.9 V maximum clamping voltage (VC) at 47 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the 1N5641A datasheet, 1N5641A pinout, 1N5641A application, or 1N5641A equivalent, this device is selected for robust secondary lightning protection (IEC61000-4-5 Class 4 with 42 Ω source), ESD/EFT immunity (IEC61000-4-2/-4-4), and fast-clamp response (<100 ps) in critical analog signal paths and power rail interfaces.
Technical Context
The 1N5641A operates as a unidirectional avalanche diode, entering controlled breakdown above its 17.8 V standoff voltage to clamp transients while maintaining low leakage (<5 µA at VWM). Its hermetic DO-13 package ensures reliability under extreme thermal cycling (-55°C to +175°C) and radiation-hardened operation per MicroNote 050.
It delivers 1500 W peak pulse power with <100 ps response time and exhibits a +0.092%/°C temperature coefficient of VBR, enabling stable clamping performance across wide ambient ranges. The cathode is internally connected to the metal case, requiring proper grounding in PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Rated Standoff) | 17.8 V - Maximum continuous reverse voltage before conduction; sets minimum system operating voltage margin. |
| VBR (Min @ IBR) | 19.8 V @ 1 mA - Guaranteed avalanche initiation threshold; defines lower bound of protection window. |
| VC @ IPP | 31.9 V @ 47 A - Maximum clamped voltage during 10/1000 µs surge; determines protected circuit's overvoltage ceiling. |
| PPP (Peak Pulse Power) | 1500 W - Sustains single high-energy transients without failure; validated per JEDEC test conditions. |
| IPP (Peak Pulse Current) | 47 A - Peak current handled at VC; correlates directly to IEC61000-4-5 Class 4 (42 Ω) surge capability. |
| TJ Range | -55°C to +175°C - Full military-grade operating envelope; supports engine bay, avionics, and downhole applications. |
| Response Time | <100 ps - Near-instantaneous clamping; prevents ESD/EFT-induced latch-up or gate oxide damage. |
Pinout & Package
Package: DO-13 (DO-202AA), hermetically sealed metal-glass case with tin-lead plated leads. Cathode terminal is electrically connected to the case and marked by a diode symbol on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Transient current entry point | Connected to protected line (e.g., signal or power rail); must be routed with minimal inductance. |
| Cathode (Lead 1 / Case) | Clamping return path | Internally bonded to metal case; requires low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Enables precise clamping on positive-going transients while blocking reverse leakage below VWM. |
| Hermetic DO-13 metal package | Provides superior moisture resistance, thermal conductivity (50°C/W junction-to-lead), and radiation hardness vs. plastic alternatives. |
| 1500 W peak pulse power | Meets IEC61000-4-5 Class 4 surge requirements with 42 Ω source impedance without derating. |
| 0.092%/°C VBR tempco | Ensures predictable clamping voltage shift across -55°C to +175°C, critical for high-reliability thermal environments. |
| MIL-PRF-19500/500 qualified "A" suffix | Guarantees tighter parametric tolerances and extended screening for JANTXV-level aerospace deployments. |
Applications
| Aerospace Avionics Power Bus Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting 24 V DC power distribution lines in flight control computers from induced lightning surges and switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient energy into chassis ground before it reaches downstream regulators and FPGAs. Use Value: Maintains 31.9 V clamping ceiling at 47 A, preventing overvoltage damage to 3.3 V/5 V logic supplies and ensuring DO-178B compliance. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers against EFT bursts and relay coil kickback. IC Role / Device Role / Timing Role: Fast-response (<100 ps) voltage clamp placed across input terminals to shunt transient energy before op-amp front-end saturation. Use Value: Limits input voltage excursion to ≤31.9 V during 1 kV/50 Ω EFT events (IEC61000-4-4), preserving ADC accuracy and isolation barrier integrity. |
| Automotive Engine Control Module (ECM) Sensors | Railway Signaling Interface Protection |
Use Scenario: Shielding crankshaft/camshaft position sensor signal lines from inductive load switching noise and battery dump transients. IC Role / Device Role / Timing Role: Standoff-rated (17.8 V) unidirectional suppressor placed at connector interface to absorb sub-100 ns spikes before reaching Hall-effect ICs. Use Value: Withstands -55°C to +175°C ambient and provides <5 µA leakage at VWM, ensuring sensor bias stability and EMC immunity per ISO 7637-2. |
Use Scenario: Protecting 24 V DC track circuit interfaces in signaling relays from secondary lightning coupling via long cable runs. IC Role / Device Role / Timing Role: High-power (1500 W) clamping device mounted at field termination panel to divert IEC61000-4-5 Class 4 surges (42 Ω) to earth ground. Use Value: Delivers 47 A peak pulse current handling with 31.9 V clamping, meeting EN 50121-4 immunity requirements for rolling stock electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ19A | Surface-mount SMC package; same 19 V VBR min, but 33.2 V VC @ 45 A and 1500 W rating. | Requires PCB rework for SMT layout; lacks hermetic seal and radiation hardness. | Select when board space is constrained and MIL-spec qualification is not required. |
| 1N5641 | Commercial-grade version; identical electrical specs but no MIL-PRF-19500/500 screening or tighter "A" tolerance binning. | Not approved for JANTXV-level aerospace or defense programs requiring traceable lot screening. | Choose for cost-sensitive industrial designs where full military qualification is unnecessary. |
Compared with SMCJ19A and 1N5641, the 1N5641A uniquely combines hermetic DO-13 packaging, radiation hardness, and JANTXV qualification-making it irreplaceable in avionics, missile guidance, and nuclear instrumentation where long-term reliability under extreme stress is non-negotiable.
Availability
1N5641A is available at Aetrix Electronics and suitable for aerospace avionics, industrial PLC analog I/O, automotive ECM sensor interfaces, and railway signaling systems requiring stable component supply across extended product lifecycles.
Supply support for 1N5641A 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 1N5641A belongs to Microchip's legacy JAN/JANTXV-qualified TVS diode family, engineered specifically for mission-critical surge protection in environments where failure is not an option-including airborne platforms, satellite subsystems, and safety-critical infrastructure.
FAQ
What is the clamping voltage of the 1N5641A under a standard 10/1000 µs surge?
The 1N5641A has a maximum clamping voltage (VC) of 31.9 V when subjected to its rated 47 A peak pulse current under the 10/1000 µs waveform. This value is guaranteed across temperature and represents the upper limit of voltage seen by protected circuitry during surge events, making the 1N5641A suitable for safeguarding 24 V systems with tight overvoltage margins.
Is the 1N5641A suitable for IEC61000-4-5 Class 4 secondary lightning protection?
Yes, the 1N5641A 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 47 A peak pulse current rating and 1500 W power handling align directly with Class 4 test levels, and its <100 ps response time ensures effective suppression before system-level damage occurs.
How does the DO-13 package of the 1N5641A differ from plastic TVS diodes in terms of reliability?
The DO-13 package of the 1N5641A is hermetically sealed metal-glass construction, offering superior moisture resistance, thermal conductivity (50°C/W junction-to-lead), and radiation hardness compared to plastic axial-leaded or SMT packages. This makes the 1N5641A viable in high-humidity, high-radiation, or thermally cycled environments where plastic-bodied devices risk parameter drift or catastrophic failure.
Does the 1N5641A have military qualification, and what does the "A" suffix signify?
Yes, the "A" suffix in 1N5641A denotes compliance with tighter parametric tolerances and screening per MIL-PRF-19500/500, enabling use in JANTXV-level military and aerospace applications. The 1N5641A is fully qualified for operation from -55°C to +175°C and meets radiation hardness requirements per MicroNote 050-features not present in commercial-only variants like 1N5641.
Can the 1N5641A be used for ESD protection per IEC61000-4-2?
Yes, the 1N5641A is documented for ESD protection per IEC61000-4-2 due to its <100 ps response time and low clamping voltage. It effectively limits transient voltages to ≤31.9 V during contact discharge events, protecting sensitive analog front-ends and digital interfaces-particularly in avionics and industrial control where system-level ESD immunity is mandated.
1N5641A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-13
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- 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
1N5641A FAQ
1.How can I place an order for 1N5641A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5641A 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 1N5641A reliable?
The price and inventory of 1N5641A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5641A is usually 5 days.
3.What payment methods are accepted for 1N5641A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5641A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5641A?
1N5641A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5641A 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 1N5641A?
For technical support, including 1N5641A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5641A requirements.
6.How does Aetrix verify that 1N5641A is sourced from the original manufacturer or authorized distributors?
All 1N5641A 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 1N5641A meets industry standards.
7.What is the process for return or replacement of 1N5641A?
All 1N5641A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5641A, 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 1N5641A part is unused and in its original packaging.
Return procedure for 1N5641A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5641A 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…
