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Microchip Technology 1N5657A/TR
- Part No.:
- 1N5657A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5657A/TR.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:9,848
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Product details
Overview
1N5657A/TR from Microchip Technology 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 90 V standoff voltage (VWM), 105 V breakdown voltage (VBR min), and 144 V clamping voltage (VC) at 10.4 A peak pulse current - widely deployed in avionics power rail protection against secondary lightning surges per IEC61000-4-5.
For engineers reviewing the 1N5657A/TR datasheet, 1N5657A/TR pinout, 1N5657A/TR application, or 1N5657A/TR equivalent, this part delivers military-grade surge resilience in through-hole form factor, with sub-100 ps response time, -55°C to +175°C operating range, and tape-and-reel packaging (TR suffix) for automated assembly - critical for high-reliability aerospace, defense, and industrial control systems requiring repeatable ESD/EFT immunity per IEC61000-4-2/-4-4.
Technical Context
This unidirectional TVS operates as a reverse-biased avalanche clamp: it remains nonconductive below its 90 V rated standoff voltage (VWM), triggers at ≥105 V breakdown (VBR), and limits transients to ≤144 V at 10.4 A peak pulse current (IPP). Its 50°C/W junction-to-lead thermal resistance enables robust power handling when mounted with 10 mm lead length.
The DO-13 package features cathode-connected metal case polarity, tin-lead plating per MIL-STD-750, and hermetic metal-glass sealing - ensuring long-term reliability under thermal cycling and humidity exposure. It is qualified to MIL-PRF-19500/500 JANTXV level when ordered with prefix (e.g., JANTXV1N5657A), but the 1N5657A/TR itself is commercial-grade with "A" tolerance (±5% VBR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 10/1000 µs - sustains high-energy surges without failure in inductive switching or lightning-induced events |
| Standoff Voltage (VWM) | 90 V - maximum continuous reverse voltage before leakage exceeds 5 µA; sets minimum system operating margin |
| Breakdown Voltage (VBR) | 105–116 V @ 1 mA - precise avalanche initiation threshold enabling predictable clamping onset |
| Clamping Voltage (VC) | 144 V @ 10.4 A IPP - maximum voltage seen by protected circuit during worst-case surge |
| Response Time | <100 ps - ensures protection before sensitive downstream ICs experience overvoltage stress |
| Operating Temperature | -55°C to +175°C - supports deployment in engine bays, avionics bays, and industrial enclosures without derating |
| Package | DO-13 (DO-202AA) - hermetic metal-glass through-hole package with cathode-to-case polarity and 1.4 g mass |
Pinout & Package
DO-13 (DO-202AA) hermetically sealed 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 during reverse surge | Connected to protected line; carries full IPP during clamping event |
| Cathode (Lead 1 / Case) | Reference and return path | Internally bonded to metal case; must be tied to system ground plane for effective surge shunting |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping architecture | Enables precise overvoltage protection on DC power rails without forward conduction interference |
| 1500 W peak pulse rating | Withstands repeated 10/1000 µs surges up to Class 4 IEC61000-4-5 (42 Ω source) without degradation |
| Hermetic DO-13 metal package | Eliminates moisture ingress and intermetallic corrosion risks in high-humidity or salt-spray environments |
| Sub-100 ps response time | Clamps ESD events (IEC61000-4-2) before logic-level devices enter latch-up or suffer gate oxide damage |
| Tape-and-reel (TR) packaging | Supports automated insertion and reflow-compatible lead tinning (260°C/10 s max) |
Applications
| Aerospace Power Distribution | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protection of 28 V DC bus in aircraft auxiliary power units against load dump and induced RF transients. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed directly across bus input terminals to shunt surge energy to chassis ground. Use Value: Maintains 90 V VWM margin above nominal 28 V bus while clamping secondary lightning surges (IEC61000-4-5, 42 Ω) to ≤144 V - preventing regulator latch-up and MOSFET gate rupture. |
Use Scenario: Input stage protection for PLC analog I/O modules exposed to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Unidirectional TVS installed at signal/power entry connector to absorb 8.3 ms half-sine surges up to 200 A forward surge current. Use Value: Leverages 175°C max operating temperature and 50°C/W thermal resistance to survive repeated 1500 W pulses without solder joint fatigue or parameter drift. |
| Avionics Sensor Interface | Military Vehicle Electronics |
Use Scenario: ESD protection for ARINC 429 data lines in flight control computers subjected to ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance TVS placed inline with twisted-pair receiver inputs to clamp fast transients without signal distortion. Use Value: Sub-100 ps response ensures clamping occurs within first 1 ns of ESD event - meeting IEC61000-4-2 Level 4 immunity without adding jitter or skew. |
Use Scenario: 270 V DC main distribution panel protection in armored vehicles against EMP-like transients and ignition noise. IC Role / Device Role / Timing Role: High-power TVS mounted with short ground straps to vehicle chassis to divert multi-kA surges away from mission-critical subsystems. Use Value: Hermetic DO-13 construction prevents performance degradation after 1000+ thermal cycles (-55°C/+175°C), ensuring field longevity in desert and arctic deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ90A | Surface-mount SMC package; 90 V VWM, 144 V VC @ 10.4 A; same electrical specs but lower thermal resistance (35°C/W junction-to-PCB) | Requires PCB redesign for SMD layout; better suited for space-constrained boards with high board-level airflow | Select when automated SMT assembly and reduced board footprint outweigh through-hole mechanical robustness |
| 1N5657 | Same DO-13 package and VWM/VBR/VC, but wider VBR tolerance (±10% vs. ±5% for "A" grade); no TR tape option | Lacks tight-tolerance assurance for precision clamping; not supplied in tape-and-reel format | Choose only for cost-sensitive, non-mission-critical applications where ±10% VBR variation is acceptable |
Compared with SMCJ90A and 1N5657, the 1N5657A/TR provides guaranteed ±5% breakdown tolerance, tape-and-reel readiness for high-volume insertion, and hermetic reliability unmatched by plastic-packaged alternatives - making it the preferred choice for aerospace and defense programs demanding traceable, long-lifecycle components.
Availability
1N5657A/TR is available at Aetrix Electronics and suitable for aerospace power distribution, industrial motor drive control, avionics sensor interface, and military vehicle electronics requiring stable component supply across extended production lifecycles.
Supply support for 1N5657A/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 company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N56xxA series belongs to Microchip's legacy military-qualified TVS portfolio, designed specifically for ruggedized transient suppression in safety-critical systems where hermetic packaging, wide temperature operation, and IEC61000-4-x compliance are mandatory.
FAQ
What is the standoff voltage (VWM) and why does it matter for 1N5657A/TR?
The 1N5657A/TR has a rated standoff voltage (VWM) of 90 V, meaning it remains in high-impedance state below this reverse voltage - allowing normal system operation without leakage current exceeding 5 µA. This value must exceed the maximum continuous DC or peak AC voltage on the protected line to prevent false triggering; selecting a VWM too close to operating voltage risks premature conduction and thermal runaway. The 90 V rating makes 1N5657A/TR ideal for 72–80 V nominal systems like airborne 28 V DC buses with ripple margins.
How does the DO-13 package of 1N5657A/TR improve reliability versus plastic TVS diodes?
The 1N5657A/TR uses a hermetically sealed DO-13 metal-glass package, eliminating moisture permeation and electrochemical migration risks inherent in plastic-molded packages. Its tin-lead plated leads meet MIL-STD-750, and the cathode-connected case provides low-inductance grounding - critical for sub-100 ps response. Unlike plastic equivalents, the DO-13 construction maintains parameter stability after 1000+ thermal cycles from -55°C to +175°C, making 1N5657A/TR suitable for engine-mounted or avionics bay applications where condensation and thermal shock are routine.
Can 1N5657A/TR be used for bidirectional transient protection?
No, the 1N5657A/TR is strictly unidirectional: it clamps only reverse-polarity transients and conducts forward current like a standard diode. For bidirectional protection (e.g., AC lines or data pairs), Microchip specifies separate parts - the 1N6036–1N6072A series in the same DO-13 package. Using 1N5657A/TR on bidirectional signals would leave positive-going transients unprotected and risk forward conduction damage during normal operation. Always verify polarity alignment before installing 1N5657A/TR.
What IEC standards does 1N5657A/TR comply with, and at what test levels?
The 1N5657A/TR is validated for IEC61000-4-2 (ESD), IEC61000-4-4 (EFT), and IEC61000-4-5 (surge) immunity. Per the datasheet, it meets Class 4 IEC61000-4-5 with 42 Ω source impedance (up to 1N5648A), Class 1 with 12 Ω (up to 1N5658A), and Class 2 with 2 Ω (up to 1N5642A). Its 144 V clamping voltage at 10.4 A ensures protected circuits remain within safe operating area during these standardized surges - a key requirement for DO-178B and MIL-STD-461G-certified systems.
Is 1N5657A/TR suitable for automotive applications?
The 1N5657A/TR is not AEC-Q200 qualified and lacks automotive-specific validation (e.g., load dump per ISO 7637-2). While its -55°C to +175°C rating covers under-hood temperatures, its DO-13 package lacks the vibration resistance and solder joint reliability required for automotive harnesses. Microchip recommends automotive-grade alternatives like the SMAJ90A or SMCJ90A for such use cases. The 1N5657A/TR is optimized for aerospace and defense systems where hermeticity and military qualification supersede automotive test requirements.
1N5657A/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):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 11A
- 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
1N5657A/TR FAQ
1.How can I place an order for 1N5657A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5657A/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 1N5657A/TR reliable?
The price and inventory of 1N5657A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5657A/TR is usually 5 days.
3.What payment methods are accepted for 1N5657A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5657A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5657A/TR?
1N5657A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5657A/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 1N5657A/TR?
For technical support, including 1N5657A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5657A/TR requirements.
6.How does Aetrix verify that 1N5657A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5657A/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 1N5657A/TR meets industry standards.
7.What is the process for return or replacement of 1N5657A/TR?
All 1N5657A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5657A/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 1N5657A/TR part is unused and in its original packaging.
Return procedure for 1N5657A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5657A/TR Tags
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