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Microchip Technology 1N5665A
- Part No.:
- 1N5665A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5665A.pdf
- Description:
- TVS DIODE 171VWM 274VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:8,802
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Product details
Overview
1N5665A from Microsemi (now Microchip) 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 162 V standoff voltage (VWM), 180–190 V breakdown voltage (VBR), and 287 V maximum clamping voltage (VC) at 5.2 A peak pulse current - widely deployed in avionics and industrial power rail protection against IEC61000-4-5 secondary lightning surges.
For engineers reviewing the 1N5665A datasheet, 1N5665A pinout, 1N5665A application, or 1N5665A equivalent, key selection criteria include its unidirectional polarity, DO-13 through-hole mechanical robustness, sub-100 ps response time, -55°C to +175°C operating range, and military-grade qualification readiness via JAN/JANTXV prefixes.
Technical Context
The 1N5665A operates as a silicon avalanche diode, entering controlled breakdown when transient voltage exceeds its 162 V rated standoff (VWM) and clamping to ≤287 V within <100 ps. Its thermal resistance is 50°C/W junction-to-lead at 10 mm lead length, enabling high-energy surge handling without thermal runaway under defined pulse conditions.
It complies with IEC61000-4-2 (ESD), -4-4 (EFT), and -4-5 (lightning surge with 2–42 Ω source impedance), supporting Class 1–4 secondary lightning protection depending on source impedance - specifically rated for Class 1 with 42 Ω, Class 2 with 12 Ω, and Class 2 with 2 Ω per datasheet tables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 162 V - maximum continuous reverse voltage before conduction; sets minimum system operating voltage margin. |
| VBR (Breakdown Voltage) | 180–190 V @ 1 mA - precise avalanche onset threshold ensuring predictable turn-on during transients. |
| VC (Clamping Voltage) | 287 V @ 5.2 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge. |
| PPP (Peak Pulse Power) | 1500 W - energy-handling capacity for standardized 10/1000 µs waveform; defines surge survivability. |
| Response Time | <100 ps - enables effective suppression of ESD and fast-rising EFT/lightning-induced edges. |
| Operating Temp Range | -55°C to +175°C - supports deployment in extreme environments including aerospace and downhole industrial systems. |
| Junction-to-Lead Rθ | 50°C/W - allows accurate thermal modeling for lead-mounted PCB layouts with 10 mm lead length. |
Pinout & Package
Hermetically sealed DO-13 (DO-202AA) metal-glass package with axial leads; cathode connected directly to case and marked by diode symbol on body. Weight: 1.4 g. Tin-lead plated leads compliant with MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Current entry terminal during forward bias or transient clamp | Connected internally to P-region; must be tied to lower-potential node (e.g., ground or return path). |
| Cathode (Lead 1 / Case) | Current exit terminal; electrically bonded to metal case | Provides low-inductance, low-impedance path to ground; requires direct mechanical mounting to grounded heatsink or chassis. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Enables precise clamping only on negative transients relative to cathode, preserving DC bias integrity on positive rails. |
| Hermetic DO-13 metal package | Guarantees long-term reliability in high-humidity, corrosive, or radiation-prone environments (e.g., avionics, defense). |
| MIL-PRF-19500/500 qualification path | Supports JAN/JANTX/JANTXV prefix variants for space-qualified or military-critical applications with tighter tolerances. |
| Inherent radiation hardness | Validated per MicroNote 050 - eliminates need for external radiation hardening in satellite or nuclear instrumentation designs. |
| IEC61000-4-5 Class 1 compatibility (42 Ω) | Meets highest secondary lightning immunity level for telecom and industrial control cabinet inputs. |
Applications
| Aerospace Power Distribution | Industrial Motor Drive Inputs |
|---|---|
|
Use Scenario: Protecting 28 VDC aircraft bus feeders from load dump and induced RF transients during flight control actuation. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed across bus input terminals to shunt surge energy to chassis ground. Use Value: Withstands 1500 W surges and operates up to +175°C, meeting DO-160 Section 22 lightning indirect effects requirements. |
Use Scenario: Safeguarding PLC analog input modules from switching transients generated by contactor coil de-energization. IC Role / Device Role / Timing Role: Standoff-clamp protector mounted at signal entry point to limit voltage excursion below ADC damage threshold. Use Value: Sub-100 ps response ensures clamping occurs before 12-bit SAR ADC sampling window, preventing data corruption. |
| Avionics Sensor Interfaces | Telecom Line Card Protection |
|
Use Scenario: Shielding inertial measurement unit (IMU) analog supply lines from ESD events during maintenance handling. IC Role / Device Role / Timing Role: Low-leakage (5 µA @ VWM) unidirectional suppressor placed between LDO output and sensor VDD pin. Use Value: 5 µA standby current avoids loading precision voltage references; hermetic seal prevents moisture-induced parameter drift. |
Use Scenario: Secondary surge protection on AC-powered telecom line cards subjected to IEC61000-4-5 Class 1 (42 Ω) lightning surges. IC Role / Device Role / Timing Role: Final-stage clamping device downstream of gas discharge tube (GDT) primary protection. Use Value: 287 V clamping voltage ensures downstream DC/DC converters remain within absolute maximum ratings during surge recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ160A | Surface-mount SMC package; 160 V VWM; 259 V VC @ 5.8 A; same 1500 W rating but lower clamping voltage. | Requires PCB re-layout; better suited for high-density consumer electronics where DO-13 footprint is prohibitive. | Select when automated assembly, smaller board area, or higher-volume production justifies SMT conversion. |
| 1N5663A | Lower VWM (138 V); VBR 153–162 V; VC 244 V @ 6.2 A; identical DO-13 package and military qualification path. | Used where system nominal voltage is 115 VAC-derived DC bus; not suitable for 162+ V applications. | Choose only if design operates below 150 V DC and requires tighter voltage margin between VWM and system max. |
Compared with SMCJ160A and 1N5663A, the 1N5665A uniquely balances high-voltage standoff (162 V), hermetic reliability, and legacy through-hole compatibility - making it irreplaceable in field-replaceable avionics LRUs and military chassis-mounted power supplies where DO-13 mechanical robustness and radiation tolerance are non-negotiable.
Availability
1N5665A is available at Aetrix Electronics and suitable for aerospace power distribution, industrial motor drive inputs, avionics sensor interfaces, and telecom line card protection requiring stable component supply across extended product lifecycles.
Supply support for 1N5665A 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
Microsemi - acquired by Microchip Technology in 2018 - specializes in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N5665A belongs to Microsemi's legacy DO-13 TVS family, engineered for mission-critical transient suppression where hermetic sealing, radiation hardness, and military qualification are mandatory design requirements.
FAQ
What is the standoff voltage (VWM) specification for the 1N5665A?
The 1N5665A has a rated standoff voltage (VWM) of 162 V, meaning it remains nonconductive up to this reverse DC or peak AC voltage under normal operation. This value is selected to exceed the maximum continuous operating voltage of the protected circuit while allowing sufficient margin before avalanche conduction begins - a critical parameter verified per JEDEC test conditions in the T4-LDS-0096 datasheet.
Does the 1N5665A support military-grade qualification?
Yes, the 1N5665A is the commercial "A"-suffix variant in a family qualified to MIL-PRF-19500/500. By adding the JANTXV prefix (e.g., JANTXV1N5665A), users obtain fully tested, screened, and documented military-grade units with tighter parametric tolerances and extended environmental testing - all leveraging the same DO-13 hermetic package and electrical characteristics as the base 1N5665A.
What is the maximum clamping voltage (VC) of the 1N5665A under standard surge conditions?
The 1N5665A exhibits a maximum clamping voltage (VC) of 287 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPP) of 5.2 A. This value represents the highest voltage imposed on the protected circuit during surge events and is measured per Figure 2 in the T4-LDS-0096 datasheet - confirming safe operation for downstream components rated to 300 V absolute maximum.
How does the DO-13 package of the 1N5665A impact thermal performance?
The DO-13 package of the 1N5665A delivers a junction-to-lead thermal resistance (RθJL) of 50°C/W when leads are trimmed to 10 mm, enabling efficient heat transfer to the PCB or chassis. This allows sustained surge handling without thermal runaway, unlike plastic-packaged alternatives - a key reason the 1N5665A remains preferred in high-reliability, high-temperature applications such as avionics power supplies.
Can the 1N5665A be used for IEC61000-4-5 secondary lightning protection?
Yes, the 1N5665A is explicitly rated for IEC61000-4-5 secondary lightning protection: Class 1 with 42 Ω source impedance, Class 2 with 12 Ω, and Class 2 with 2 Ω per the Applications/Benefits section of T4-LDS-0096. Its 1500 W peak pulse power and sub-100 ps response ensure compliance across these test configurations without derating or parallel staging.
1N5665A 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):
- 171V
- Voltage - Breakdown (Min):
- 190V
- Voltage - Clamping (Max) @ Ipp:
- 274V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- 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
1N5665A FAQ
1.How can I place an order for 1N5665A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5665A 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 1N5665A reliable?
The price and inventory of 1N5665A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5665A is usually 5 days.
3.What payment methods are accepted for 1N5665A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5665A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5665A?
1N5665A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5665A 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 1N5665A?
For technical support, including 1N5665A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5665A requirements.
6.How does Aetrix verify that 1N5665A is sourced from the original manufacturer or authorized distributors?
All 1N5665A 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 1N5665A meets industry standards.
7.What is the process for return or replacement of 1N5665A?
All 1N5665A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5665A, 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 1N5665A part is unused and in its original packaging.
Return procedure for 1N5665A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5665A Tags
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