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Microchip Technology 1N5648A/TR
- Part No.:
- 1N5648A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5648A/TR.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:6,862
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Product details
Overview
1N5648A/TR 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 and industrial systems. It features a 34.8 V rated standoff voltage (VWM), 40.9 V minimum breakdown voltage (V(BR)), 59.3 V maximum clamping voltage (VC) at 25.3 A peak pulse current (IPP), and 1500 W peak pulse power rating per 10/1000 µs waveform - commonly deployed in avionics power rail protection.
For engineers reviewing the 1N5648A/TR datasheet, 1N5648A/TR pinout, 1N5648A/TR application, or 1N5648A/TR equivalent, key selection criteria include its IEC61000-4-5 Class 4 secondary lightning capability with 42 Ω source impedance, sub-100 ps response time, -55°C to +175°C operating temperature range, and military-grade hermetic DO-13 packaging suitable for high-reliability embedded power interfaces.
Technical Context
This unidirectional TVS operates in avalanche breakdown during transients while remaining nonconductive below its 34.8 V standoff voltage. Its clamping action limits induced surges to ≤59.3 V at 25.3 A, enabling robust protection of downstream 3.3 V–28 V logic and power circuitry without forward conduction under normal bias.
The device uses a welded, tin-lead-plated DO-13 metal-glass package with cathode-to-case polarity, delivering 50°C/W junction-to-lead thermal resistance and inherent radiation hardness per MicroNote 050 - critical for airborne and space-qualified systems where ESD, EFT, and switching transients coexist.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 34.8 V - ensures nonconductive operation on 28 V DC rails with 25% margin against ripple and tolerance drift |
| V(BR) @ I(BR) | Min 40.9 V at 1 mA - defines reliable avalanche initiation threshold for predictable transient suppression onset |
| VC @ IPP | 59.3 V at 25.3 A - clamps 10/1000 µs surges to safe levels for 36 V-rated MOSFETs and controllers |
| PPP (Peak Pulse Power) | 1500 W - sustains single-event surges up to 1500 W without degradation under JEDEC test conditions |
| Response Time | <100 ps - intercepts ESD and fast-rising transients before sensitive ICs experience overstress |
| Operating Temp | -55°C to +175°C - supports deployment in engine bay, avionics bays, and downhole electronics without derating |
| Package | DO-13 (DO-202AA) - hermetically sealed metal-glass case enables long-term reliability in humid, corrosive, or vacuum environments |
Pinout & Package
Hermetically sealed DO-13 (DO-202AA) metal-glass package with axial leads; cathode terminal electrically connected to the metal case and marked by diode symbol on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Transient current entry point | Connected to protected line; carries full surge current into avalanche region during clamping |
| Cathode (Lead 1 / Case) | Reference and return path | Internally bonded to metal case; must be tied to system ground plane for low-inductance surge shunting |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables integration on positive-rail-only protection paths without reverse-bias leakage concerns |
| 1500 W peak pulse rating | Meets MIL-STD-1275B and RTCA/DO-160 Section 22 surge requirements for aircraft power systems |
| Hermetic DO-13 packaging | Eliminates moisture ingress and parameter drift over 20+ year service life in sealed avionics enclosures |
| IEC61000-4-5 Class 4 compliance | Validated for 4 kV surge immunity with 42 Ω source impedance - standard for commercial aircraft subsystems |
| Radiation hardness | Inherently qualified per MicroNote 050 for total ionizing dose (TID) >100 krad(Si), supporting space-qualified designs |
Applications
| Aerospace Power Distribution | Industrial Motor Drive Controls |
|---|---|
|
Use Scenario: Protection of 28 V DC bus inputs in flight control actuators exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp absorbing 1500 W transients within 100 ps to prevent gate oxide rupture in upstream DC-DC controllers. Use Value: Enables compliance with RTCA/DO-160 Section 22 Level 3 (42 Ω, 4 kV) without external snubbers or layout compromises. |
Use Scenario: Guarding PLC I/O module power rails against relay coil flyback and contact arcing in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-regulated avalanche suppressor limiting transient voltage to 59.3 V during 8.3 ms half-sine surges up to 200 A. Use Value: Extends mean time between failures (MTBF) of 24 V logic supervisors by eliminating cumulative stress from repetitive 1–5 A switching events. |
| Avionics Sensor Interfaces | Military Vehicle Power Systems |
|
Use Scenario: Shielding analog sensor signal conditioning circuits (e.g., pressure transducers) from RF-induced transients in radar-equipped platforms. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed at connector entry point to divert EFT bursts per IEC61000-4-4 (5 kHz, 4 kV). Use Value: Maintains <1 LSB error in 16-bit ADC measurements during simultaneous RF exposure and power cycling. |
Use Scenario: Safeguarding vehicle ECUs connected to 24 V battery systems subject to ISO 7637-2 Pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Primary front-end protector with 34.8 V VWM matching nominal 24 V architecture and 175°C max temp rating for under-hood placement. Use Value: Eliminates need for secondary TVS stages, reducing BOM count and PCB area in constrained military chassis designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5648A | No tape-and-reel packaging; lead-free finish not specified; same electrical specs and DO-13 package | Requires manual loading or bulk handling; unsuitable for automated SMT lines despite axial form factor | Select 1N5648A/TR when volume reel-fed assembly is required and JEDEC-compliant tape packaging is mandatory |
| SMCJ36A | Surface-mount SMC package; 36 V VWM; 58.1 V VC @ 25.1 A; RoHS-compliant matte tin finish | Lacks hermetic seal and radiation hardness; limited to commercial-temp (-65°C to +150°C) industrial use | Choose SMCJ36A only for cost-sensitive, non-military terrestrial applications where board space is constrained and reflow compatibility is essential |
Compared with 1N5648A/TR, the bare 1N5648A lacks tape-and-reel support for high-volume production, while SMCJ36A trades hermetic reliability and extended temperature range for surface-mount convenience and RoHS compliance - making 1N5648A/TR the sole option for radiation-hardened, high-temp, reel-fed aerospace deployments.
Availability
1N5648A/TR is available at Aetrix Electronics and suitable for aerospace power distribution, industrial motor drive controls, avionics sensor interfaces, and military vehicle power systems requiring stable component supply across extended product lifecycles.
Supply support for 1N5648A/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 specializing in microcontrollers, analog devices, and high-reliability discrete components for aerospace, defense, and industrial markets.
The 1N56xxA series was developed to meet MIL-PRF-19500/500 requirements for hermetic, high-power TVS diodes used in mission-critical avionics and vehicle electronics where failure is not an option.
FAQ
What is the clamping voltage of the 1N5648A/TR under a 10/1000 µs surge?
The 1N5648A/TR exhibits a maximum clamping voltage (VC) of 59.3 V when subjected to its rated peak pulse current of 25.3 A under the standardized 10/1000 µs waveform. This value is measured at 25°C ambient and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream 36 V-rated components remain within safe operating area.
Does the 1N5648A/TR meet IEC61000-4-5 Class 4 requirements?
Yes, the 1N5648A/TR is validated for IEC61000-4-5 Class 4 secondary lightning protection when tested with a 42 Ω source impedance, delivering 4 kV surge immunity. This classification is explicitly confirmed in the manufacturer's technical data sheet and aligns with design requirements for commercial aircraft subsystems and ruggedized industrial controllers.
What is the thermal resistance specification for the 1N5648A/TR?
The 1N5648A/TR has a junction-to-lead thermal resistance (RθJL) of 50°C/W when measured at 0.375 inches (10 mm) from the case body. This parameter governs heat dissipation during repetitive surge events and informs heatsinking decisions - especially important in enclosed avionics enclosures where ambient temperatures may exceed 100°C.
Is the 1N5648A/TR suitable for radiation-intensive environments?
Yes, the 1N5648A/TR is inherently radiation hard per Microsemi MicroNote 050, supporting total ionizing dose (TID) tolerance exceeding 100 krad(Si). This makes it appropriate for deployment in satellite power systems, nuclear instrumentation, and high-altitude avionics where single-event effects and cumulative dose must be mitigated without additional shielding.
How does the "TR" suffix affect the 1N5648A/TR packaging and handling?
The "TR" suffix indicates tape-and-reel packaging per EIA-296 standards, enabling automated pick-and-place assembly for high-volume manufacturing. The 1N5648A/TR retains identical electrical and mechanical specifications as the bulk 1N5648A variant but adds carrier tape, cover tape, and reel logistics - essential for SMT line integration while preserving DO-13 hermetic integrity.
1N5648A/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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 25.3A
- 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
1N5648A/TR FAQ
1.How can I place an order for 1N5648A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5648A/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 1N5648A/TR reliable?
The price and inventory of 1N5648A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5648A/TR is usually 5 days.
3.What payment methods are accepted for 1N5648A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5648A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5648A/TR?
1N5648A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5648A/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 1N5648A/TR?
For technical support, including 1N5648A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5648A/TR requirements.
6.How does Aetrix verify that 1N5648A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5648A/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 1N5648A/TR meets industry standards.
7.What is the process for return or replacement of 1N5648A/TR?
All 1N5648A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5648A/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 1N5648A/TR part is unused and in its original packaging.
Return procedure for 1N5648A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5648A/TR Tags
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