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Microchip Technology 1N5634A/TR
- Part No.:
- 1N5634A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5634A/TR.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:8,591
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Product details
Overview
1N5634A/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 in aerospace and industrial systems. It features a 9.4 V rated standoff voltage (VWM), 10.5 V minimum breakdown voltage (V(BR)), 15.6 V maximum clamping voltage (VC) at 96 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the 1N5634A/TR datasheet, 1N5634A/TR pinout, 1N5634A/TR application, or 1N5634A/TR equivalent, this device is selected for secondary lightning protection (IEC61000-4-5 Class 4 with 2 Ω source impedance), ESD/EFT immunity (IEC61000-4-2/-4), and inductive switching transient suppression in avionics power rails and sensor interfaces.
Technical Context
The 1N5634A/TR operates as a unidirectional avalanche-clamping TVS diode, triggered when reverse voltage exceeds its 10.5 V (min) breakdown threshold. Its response time is under 100 ps, enabling effective suppression of fast transients including ESD events and RF-induced surges.
It is rated for 1500 W non-repetitive peak pulse power at 25 °C lead temperature, with thermal resistance of 50 °C/W junction-to-lead and 110 °C/W junction-to-ambient on FR4. Operating temperature range spans –55 °C to +175 °C, supporting deployment in extreme-environment avionics and military electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.4 V - Maximum continuous reverse operating voltage before avalanche conduction begins; matches 9–10 V DC supply rails. |
| V(BR) min | 10.5 V @ 1 mA - Minimum breakdown voltage ensures reliable triggering above system nominal voltage with margin. |
| VC max | 15.6 V @ 96 A - Clamping voltage limits downstream IC stress during 10/1000 µs surges; stays below 16 V absolute max. |
| IPP | 96 A - Peak pulse current capability supports IEC61000-4-5 Class 4 (2 Ω source) secondary lightning testing. |
| PPP | 1500 W - Peak pulse power rating defines transient energy handling capacity for short-duration surges. |
| Response Time | <100 ps - Enables protection against ESD (IEC61000-4-2) and fast EFT bursts without signal degradation. |
| Operating Temp | –55 °C to +175 °C - Qualified for extended-range operation in engine-mounted avionics and downhole industrial equipment. |
Pinout & Package
Package: DO-13 (DO-202AA), hermetically sealed metal-glass case with tin-lead plated leads; cathode connected to case and marked by diode symbol on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to protected circuit ground or low-side return path; carries forward surge current during clamping. |
| Cathode | Reverse-biased clamping terminal | Electrically tied to metal case; mounted directly to chassis ground for lowest-inductance transient path. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Protects only reverse-polarity transients while allowing normal forward-biased operation in DC power paths. |
| Hermetic DO-13 metal package | Provides radiation hardness (per MicroNote 050) and long-term reliability in high-humidity, high-vibration aerospace environments. |
| 1500 W peak pulse power | Handles high-energy surges from inductive load switching (e.g., solenoids, relays) without degradation over lifetime. |
| IEC61000-4-5 Class 4 compliance | Validated for secondary lightning protection with 2 Ω source impedance-critical for airborne electrical system certification. |
| ESD/EFT immunity | Clamps sub-nanosecond ESD events (IEC61000-4-2 ±8 kV contact) and repetitive EFT bursts (IEC61000-4-4) to safe levels. |
Applications
| Aerospace Power Distribution | Industrial Sensor Interface |
|---|---|
Use Scenario: Protection of 10 V DC bus feeding flight control actuators against induced lightning transients and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across bus input to clamp surges to ≤15.6 V within 100 ps. Use Value: Prevents latch-up or burnout of downstream DC-DC converters and motor drivers during MIL-STD-461G CS115 testing. |
Use Scenario: Shielding 4–20 mA current-loop sensors in oil & gas PLC cabinets from EFT coupling on long field wiring. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 9.4 V) placed across loop terminals to absorb 40 A/10/1000 µs bursts. Use Value: Maintains loop integrity during IEC61000-4-4 Level 4 (4 kV) testing without signal interruption or calibration drift. |
| Avionics Data Bus Protection | Military Vehicle Power Input |
Use Scenario: Safeguarding ARINC 429 receiver inputs from RF-induced transients coupled via antenna cables. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS shunting transient energy to chassis ground before signal conditioning stage. Use Value: Preserves signal edge fidelity (<100 ps response) while meeting DO-160 Section 22 radiated susceptibility requirements. |
Use Scenario: Front-end surge protection for 24 V vehicle ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device on main power entry, coordinated with upstream fuse and downstream LC filter. Use Value: Withstands 1500 W pulses without parametric shift, ensuring compliance with DEF-STAN 59-41 Annex C surge profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5634A | No tape-and-reel packaging; bulk or ammo pack only; identical electrical specs and DO-13 package. | Preferred for manual assembly or low-volume prototyping where reel feed is unnecessary. | Select 1N5634A/TR when automated SMT placement requires EIA-296 compliant tape-and-reel delivery. |
| SMBJ9.0A | Surface-mount SMB package; 9.0 V VWM; 14.4 V VC @ 64.9 A; lower IPP (64.9 A vs. 96 A); same 1500 W PPP. | Better suited for space-constrained PCBs but lacks hermetic sealing and radiation hardness of DO-13 metal case. | Choose SMBJ9.0A only if board layout prohibits through-hole mounting and radiation tolerance is not required. |
Compared with 1N5634A/TR, the 1N5634A offers identical protection performance without tape-and-reel logistics, while SMBJ9.0A trades mechanical robustness and radiation hardness for compactness-making the TR variant optimal for high-reliability through-hole production runs requiring traceable reel delivery.
Availability
1N5634A/TR is available at Aetrix Electronics and suitable for aerospace power distribution, industrial sensor interface, avionics data bus protection, and military vehicle power input applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5634A/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 manufacturer specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5634A/TR belongs to Microchip's legacy JAN/JANTXV-qualified TVS diode family, engineered specifically for mission-critical transient suppression in avionics, military platforms, and harsh-environment industrial control systems.
FAQ
What is the standoff voltage (VWM) of the 1N5634A/TR?
The 1N5634A/TR has a rated standoff voltage (VWM) of 9.4 V, meaning it remains nonconductive under continuous reverse bias up to this level. This value is selected to exceed typical 9 V or 10 V DC supply rails while providing sufficient margin before breakdown at 10.5 V minimum. The 1N5634A/TR maintains low leakage (<5 µA) at VWM, ensuring minimal power loss in always-on protection circuits.
Does the 1N5634A/TR meet IEC61000-4-5 Class 4 requirements?
Yes, the 1N5634A/TR is validated for IEC61000-4-5 Class 4 secondary lightning protection when tested with a 2 Ω source impedance, supporting peak pulse currents up to 96 A. Its 15.6 V clamping voltage at that current ensures downstream circuitry remains within safe operating limits. This capability is explicitly documented in the T4-LDS-0096 datasheet for the 1N5634A/TR and related "A" suffix variants.
Is the 1N5634A/TR suitable for ESD protection per IEC61000-4-2?
Yes, the 1N5634A/TR clamps transients in less than 100 picoseconds, making it effective for ESD protection per IEC61000-4-2 (±8 kV contact discharge). Its low clamping voltage (15.6 V) and high peak pulse power (1500 W) allow it to absorb fast, high-energy discharges without failure. The 1N5634A/TR is routinely deployed on avionics I/O lines where ESD robustness is mandatory.
What is the package type and mounting style of the 1N5634A/TR?
The 1N5634A/TR uses a DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads, designed for through-hole mounting. The cathode is electrically connected to the metal case, which must be soldered to a grounded copper plane or chassis for optimal surge current path. Its 1.4 g weight and tin-lead plating comply with MIL-STD-750 solderability standards.
How does the 1N5634A/TR differ from the non-"A" version (e.g., 1N5634)?
The "A" suffix in 1N5634A/TR denotes tighter parameter tolerances-specifically, a minimum breakdown voltage of 10.5 V (vs. 9.9 V for 1N5634) and tighter VWM control. This improves consistency in high-reliability designs where precise clamping thresholds are critical. All other specifications-including package, thermal ratings, and surge capability-are identical between 1N5634A/TR and 1N5634/TR.
1N5634A/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):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- Current - Peak Pulse (10/1000µs):
- 96A
- 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
1N5634A/TR FAQ
1.How can I place an order for 1N5634A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5634A/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 1N5634A/TR reliable?
The price and inventory of 1N5634A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5634A/TR is usually 5 days.
3.What payment methods are accepted for 1N5634A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5634A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5634A/TR?
1N5634A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5634A/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 1N5634A/TR?
For technical support, including 1N5634A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5634A/TR requirements.
6.How does Aetrix verify that 1N5634A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5634A/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 1N5634A/TR meets industry standards.
7.What is the process for return or replacement of 1N5634A/TR?
All 1N5634A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5634A/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 1N5634A/TR part is unused and in its original packaging.
Return procedure for 1N5634A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5634A/TR Tags
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