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Microchip Technology 1N5663A
- Part No.:
- 1N5663A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5663A.pdf
- Description:
- TVS DIODE 145VWM 234VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:3,431
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Product details
Overview
1N5663A from Microchip (formerly Microsemi) 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 138 V rated standoff voltage (VWM), 162 V minimum breakdown voltage (V(BR)), 244 V maximum clamping voltage (VC) at 6.2 A peak pulse current (IPP), and 1500 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the 1N5663A datasheet, 1N5663A pinout, 1N5663A application, or 1N5663A equivalent, this part delivers sub-100 ps response time, MIL-PRF-19500/500 qualified "A" suffix tolerance, radiation-hardened performance per MicroNote 050, and IEC61000-4-2/4-4/4-5 compliance for ESD, EFT, and secondary lightning protection in harsh environments.
Technical Context
The 1N5663A operates as a unidirectional avalanche diode, entering controlled reverse-biased breakdown above its 138 V standoff voltage to clamp transients. Its DO-13 metal-glass hermetic package ensures stable thermal resistance (50 °C/W junction-to-lead) and operation from –55 °C to +175 °C.
It is rated for 1500 W non-repetitive peak pulse power at 10/1000 µs, with clamping voltage tightly bounded at 244 V under 6.2 A surge, enabling robust protection of downstream DC power rails and signal lines against inductive switching, RF-induced surges, and secondary lightning events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 138 V - Maximum continuous reverse voltage before conduction; sets operating margin above system DC rail (e.g., 120 V nominal bus). |
| V(BR) min/max | 162 V / 171 V @ 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPP | 244 V @ 6.2 A - Peak clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected circuitry. |
| PPP | 1500 W - Peak pulse power handling capacity; supports high-energy transients without failure under defined waveform. |
| 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 - Suitable for extended-range environments including engine bays, avionics bays, and downhole equipment. |
| Package | DO-13 (DO-202AA) - Hermetically sealed metal-glass case with cathode-connected case; enables high reliability and solderability per MIL-STD-750. |
Pinout & Package
Package: DO-13 (DO-202AA), hermetically sealed metal-glass case with cathode connected to case and polarity indicated by diode symbol marking. Weight: 1.4 g. Lead finish: Tin-Lead per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Forward conduction terminal | Connected to protected line or signal path; must be routed with low-inductance trace to minimize clamping overshoot. |
| Cathode (Lead 1 / Case) | Reverse breakdown terminal | Internally bonded to metal case; requires direct low-impedance connection to ground plane or chassis for optimal surge shunting. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Protects DC-biased lines (e.g., power supplies, sensor outputs) without interfering with normal forward conduction. |
| Hermetic DO-13 metal package | Eliminates moisture ingress and long-term parameter drift; certified for aerospace and military use per MIL-PRF-19500/500. |
| Radiation hardness | Inherently radiation-tolerant per MicroNote 050 - validated for total ionizing dose (TID) resilience in space and nuclear environments. |
| IEC61000-4-5 Class 2 compliance | Validated for secondary lightning protection with 42 Ω source impedance - meets critical infrastructure and avionics surge immunity requirements. |
| Sub-100 ps response | Clamps ESD events before IC damage thresholds are exceeded - essential for protecting sensitive analog front-ends and microcontroller I/O. |
Applications
| Aerospace Power Bus Protection | Avionics Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 115 VAC-derived 120 VDC distribution buses in aircraft electrical systems from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across bus rails to clamp surges >138 V while remaining non-conductive during normal operation. Use Value: Prevents catastrophic failure of downstream DC-DC converters and motor controllers by limiting transient overvoltage to ≤244 V at 6.2 A. |
Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) in flight control units from ESD and induced RF coupling. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point to divert fast transients before reaching precision ADC inputs. Use Value: Maintains signal integrity with <100 ps response and preserves measurement accuracy by avoiding false triggering or latch-up in sensing circuits. |
| Industrial Motor Drive Control | Military Vehicle Power Systems |
Use Scenario: Shielding PLC I/O modules and gate driver logic from commutation spikes generated by 48 V BLDC motor inverters. IC Role / Device Role / Timing Role: Standoff-rated TVS on control signal lines (e.g., PWM, enable) to absorb repetitive 1500 W surges without degradation. Use Value: Ensures functional safety compliance (IEC61800-3) by sustaining >10⁴ surge cycles at rated conditions due to hermetic packaging and thermal design. |
Use Scenario: Hardening 28 V vehicle power distribution networks in armored vehicles against EMP-like transients and lightning-induced surges. IC Role / Device Role / Timing Role: MIL-qualified unidirectional TVS used in JANTXV configuration for mission-critical subsystems requiring TID resilience and extended temperature operation. Use Value: Delivers guaranteed performance from –55 °C to +175 °C and radiation hardness per MicroNote 050 - critical for survivability in battlefield environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5663 | Non-"A" suffix: wider V(BR) tolerance (153–187 V vs. 162–171 V); no MIL qualification. | Lacks JANTXV-level screening and tighter parametric control; unsuitable for defense/aerospace programs requiring MIL-PRF-19500/500. | Select 1N5663 only for commercial-grade cost-sensitive designs where ±5% V(BR) variation is acceptable. |
| SMCJ130A | Surface-mount SMC package; same VWM (130 V) but lower VC (219 V @ 6.5 A); 1500 W rating retained. | Requires PCB rework for SMT layout; lacks hermetic seal and radiation hardness; not MIL-qualified. | Choose SMCJ130A only when board space constraints prohibit through-hole DO-13 mounting and radiation tolerance is not required. |
Compared with 1N5663 and SMCJ130A, the 1N5663A uniquely combines hermetic DO-13 packaging, MIL-PRF-19500/500 qualification, radiation hardness, and tight 162–171 V V(BR) tolerance - making it the sole option for high-reliability airborne and defense applications demanding verified parametric stability and environmental resilience.
Availability
1N5663A is available at Aetrix Electronics and suitable for aerospace power bus protection, avionics sensor interface protection, and military vehicle power systems requiring stable component supply, long-term obsolescence management, and traceable sourcing from authorized channels.
Supply support for 1N5663A 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 acquired Microsemi in 2018 and maintains its high-reliability discrete portfolio, including radiation-hardened and MIL-qualified components for aerospace, defense, and industrial markets.
The 1N5663A belongs to Microchip's legacy TVS diode family originally developed by Microsemi for mission-critical surge protection - engineered specifically for extreme environments where hermetic sealing, wide temperature operation, and radiation tolerance are mandatory.
FAQ
What is the standoff voltage (VWM) specification for the 1N5663A?
The 1N5663A has a rated standoff voltage (VWM) of 138 V, meaning it remains non-conductive up to this reverse voltage level under normal operation. This value is selected to provide sufficient margin above common 120 VDC system rails while ensuring reliable clamping onset during transients. The 1N5663A's VWM is fixed per JEDEC registration and confirmed in the T4-LDS-0096 Rev. 3 datasheet.
Is the 1N5663A suitable for IEC61000-4-5 secondary lightning protection?
Yes, the 1N5663A is explicitly rated for IEC61000-4-5 Class 2 secondary lightning protection with 42 Ω source impedance, as documented in the Applications/Benefits section of the T4-LDS-0096 datasheet. Its 1500 W peak pulse power rating and 244 V clamping voltage at 6.2 A ensure compliance with the standard's surge test profiles for industrial and transportation equipment.
Does the 1N5663A have military qualification?
Yes, the "A" suffix in 1N5663A denotes tighter parametric tolerances and eligibility for JAN, JANTX, or JANTXV military qualification per MIL-PRF-19500/500 when ordered with the appropriate prefix (e.g., JANTXV1N5663A). This qualification includes screening for temperature cycling, hermeticity, and long-term reliability - confirmed in the Features section of the official datasheet.
What is the thermal resistance of the 1N5663A and how does it affect layout?
The 1N5663A has a junction-to-lead thermal resistance of 50 °C/W when measured at 0.375 inches (10 mm) from the case body. This low thermal resistance requires direct mechanical and thermal coupling of the cathode (case) to a large copper pour or chassis ground to dissipate surge energy effectively. Layout must avoid narrow traces or thermal isolation that would degrade this path and risk thermal runaway during repeated surges.
How does the 1N5663A differ from the plastic-packaged 1N6267–1N6303A series?
The 1N5663A uses a hermetically sealed DO-13 metal-glass package, whereas the 1N6267–1N6303A series employs plastic axial-leaded packages. This makes the 1N5663A superior in moisture resistance, long-term parameter stability, radiation hardness, and high-temperature operation (–55 °C to +175 °C vs. typically –65 °C to +150 °C). The 1N5663A is specified for aerospace and defense; the plastic variants are commercial-grade alternatives.
1N5663A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-13
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 145V
- Voltage - Breakdown (Min):
- 162V
- Voltage - Clamping (Max) @ Ipp:
- 234V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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
1N5663A FAQ
1.How can I place an order for 1N5663A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5663A 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 1N5663A reliable?
The price and inventory of 1N5663A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5663A is usually 5 days.
3.What payment methods are accepted for 1N5663A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5663A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5663A?
1N5663A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5663A 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 1N5663A?
For technical support, including 1N5663A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5663A requirements.
6.How does Aetrix verify that 1N5663A is sourced from the original manufacturer or authorized distributors?
All 1N5663A 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 1N5663A meets industry standards.
7.What is the process for return or replacement of 1N5663A?
All 1N5663A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5663A, 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 1N5663A part is unused and in its original packaging.
Return procedure for 1N5663A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5663A Tags
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