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Vishay General Semiconductor - Diodes Division 1.5SMC56AHE3/9AT
- Part No.:
- 1.5SMC56AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56AHE3/9AT.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,277
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Product details
Overview
1.5SMC56AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at 1 mA), 47.8 V stand-off voltage (VWM), clamps to ≤77.0 V at 19.5 A peak pulse current (10/1000 µs), and delivers 1500 W peak pulse power. It is AEC-Q101 qualified and used in automotive sensor interfaces and industrial power supply inputs.
For engineers reviewing the 1.5SMC56AHE3/9AT datasheet, 1.5SMC56AHE3/9AT pinout, 1.5SMC56AHE3/9AT application, or 1.5SMC56AHE3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping performance under 10/1000 µs transients, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable avalanche characteristics, low incremental surge resistance (<0.5 Ω typical), and fast response time (<1.0 ps), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The 1.5SMC56AHE3/9AT is rated for 150 °C maximum junction temperature, exhibits a +0.103 %/°C temperature coefficient of VBR, and is specified for operation from –65 °C to +150 °C. It meets J-STD-020 MSL Level 1 and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1 mA - defines precise avalanche onset range for reliable triggering |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | ≤77.0 V at 19.5 A (10/1000 µs) - clamping voltage limiting stress on downstream ICs/MOSFETs |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| IPPM | 19.5 A - maximum non-repetitive surge current the device safely conducts without failure |
| TJ max. | +150 °C - enables use in under-hood automotive and high-temperature industrial environments |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements (HTOL, TC, HTRB, etc.) |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 48 V supply rail or CAN-H); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against severe ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 surges |
| Glass-passivated junction | Ensures stable, repeatable avalanche behavior and long-term reliability under repetitive surge stress |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control units and ADAS sensor modules |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge) |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 47.8 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤77.0 V during 19.5 A transients. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair (e.g., 0–5 V output) to ground. Use Value: Prevents latch-up or gate oxide damage in op-amps and ADC front-ends with sub-nanosecond response. |
| Telecom DC Power Feeds | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding PoE-powered equipment inputs against induced surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Primary clamping device on input side of DC-DC converter, upstream of bulk capacitance. Use Value: Absorbs up to 1500 W of transient energy without degradation, maintaining system uptime during lightning-induced surges. |
Use Scenario: Protecting high-side and low-side MOSFET gate drivers from Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: TVS placed between gate and source terminals to clamp dv/dt-induced overshoot. Use Value: Prevents unintended turn-on or gate oxide breakdown by limiting gate-source voltage to ≤77.0 V during 100 ns spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A-E3/52T | Lower peak power (600 W), SMB package (smaller footprint), same VBR range (55.1–60.7 V) | Not AEC-Q101 qualified; suitable for commercial-grade consumer or computing applications only | Select when board space is constrained and automotive qualification is not required |
| 1.5KE56A-T | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or MSL Level 1 rating | Limited to prototyping or legacy through-hole designs; incompatible with automated SMT assembly | Choose only for manual assembly or backward compatibility with existing through-hole layouts |
Compared with 1.5SMC56AHE3/9AT, SMBJ58A-E3/52T offers smaller size but reduced surge robustness and no automotive qualification, while 1.5KE56A-T provides identical clamping performance but lacks SMT compatibility and AEC-Q101 validation-making 1.5SMC56AHE3/9AT the sole choice for production automotive SMT designs requiring full compliance.
Availability
1.5SMC56AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supplies requiring stable component supply, AEC-Q101 assurance, and high-volume tape-and-reel delivery.
Supply support for 1.5SMC56AHE3/9AT 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and consistent clamping performance are critical.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC56AHE3/9AT?
The 1.5SMC56AHE3/9AT has a specified breakdown voltage range of 53.2 V to 58.8 V at 1 mA test current, representing ±5% tolerance around the nominal 56 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting sensitive 48 V automotive electronics without premature conduction.
Is the 1.5SMC56AHE3/9AT suitable for bidirectional transient protection?
No, the 1.5SMC56AHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the 1.5SMC56CA variant. Using the 1.5SMC56AHE3/9AT in bidirectional configurations risks forward conduction during negative transients and inadequate clamping on the anode side.
Does the 1.5SMC56AHE3/9AT require a heatsink for normal operation?
No external heatsink is required for transient suppression duty cycles (e.g., <0.01% duty cycle per datasheet). The 1.5SMC56AHE3/9AT relies on PCB copper pads (0.31" × 0.31") for thermal dissipation during pulses. Its 6.5 W steady-state power rating applies only to continuous DC conditions-not typical TVS use-and derates linearly above 25 °C ambient.
What does the "HE3/9AT" suffix indicate in 1.5SMC56AHE3/9AT?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification; "9AT" specifies packaging in 13-inch diameter plastic tape and reel with 3500 units per reel. This distinguishes it from "E3/57T" (7-inch reel, 850 units) and confirms automotive-grade traceability and assembly readiness for high-volume SMT lines.
How does the 1.5SMC56AHE3/9AT perform under repeated surge stress?
The 1.5SMC56AHE3/9AT is characterized for repetitive 10/1000 µs surges at 0.01% duty cycle. Its glass-passivated junction maintains stable VBR and clamping voltage over thousands of events when operated within derated power limits (per Fig. 2). Data shows <5% parameter shift after 1000 pulses at 80% IPPM, confirming suitability for cyclic industrial environments.
1.5SMC56AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 19.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC56AHE3/9AT FAQ
1.How can I place an order for 1.5SMC56AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56AHE3/9AT 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 1.5SMC56AHE3/9AT reliable?
The price and inventory of 1.5SMC56AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC56AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56AHE3/9AT?
1.5SMC56AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56AHE3/9AT 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 1.5SMC56AHE3/9AT?
For technical support, including 1.5SMC56AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC56AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56AHE3/9AT 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 1.5SMC56AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC56AHE3/9AT?
All 1.5SMC56AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56AHE3/9AT, 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 1.5SMC56AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC56AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56AHE3/9AT Tags
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