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Vishay General Semiconductor - Diodes Division 1.5SMC56AHE3_A/H
- Part No.:
- 1.5SMC56AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56AHE3_A/H.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,612
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Product details
Overview
1.5SMC56AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at IT = 1.0 mA), 47.8 V stand-off voltage (VWM), 77.0 V maximum clamping voltage (VC) at 19.5 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial sensor interfaces, and DC power input stages.
For engineers reviewing the 1.5SMC56AHE3_A/H datasheet, 1.5SMC56AHE3_A/H pinout, 1.5SMC56AHE3_A/H application, or 1.5SMC56AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, SMC (DO-214AB) package compatibility, unidirectional polarity with cathode band marking, and thermal resistance (RθJA = 75 °C/W) for board-level thermal design validation.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under transient overvoltage events exceeding VWM, it avalanches rapidly to clamp the line at ≤77.0 V while diverting up to 19.5 A (10/1000 µs). Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), and its MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device is rated for continuous operation from –65 °C to +150 °C junction temperature, with 6.5 W steady-state power dissipation on infinite heatsink at 50 °C ambient. Its 0.01 % duty cycle limit for repetitive pulses and 200 A non-repetitive forward surge capability (8.3 ms half-sine) define safe operating boundaries for inductive switching and lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1.0 mA - defines precise avalanche initiation window for reliable triggering without false trips |
| VWM | 47.8 V - maximum continuous reverse voltage before significant leakage; sets usable DC rail margin (e.g., 48 V systems) |
| VC @ IPPM | 77.0 V at 19.5 A - clamping voltage during 1500 W transient; determines protected IC's voltage stress ceiling |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 4 compliance |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; informs minimum copper pad area (8.0 mm × 8.0 mm) for thermal reliability |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments |
| AEC-Q101 | Qualified - certified for automotive electronics per stress test standard; required for ECU, ADAS, and body control modules |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by molded band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events |
| Anode (unmarked end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes shunt conduction path |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in properly decoupled circuits |
| Glass-passivated junction | Ensures long-term stability of VBR and low parametric drift across temperature and lifetime |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow assembly without popcorn or delamination risk |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, infotainment, and ADAS sensors |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients (e.g., ESD, load dump), improving protection margin |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamping |
|---|---|
|
Use Scenario: 12 V/24 V battery-fed ECU inputs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges within 1 ns response time. Use Value: Limits rail voltage to ≤77.0 V during 1500 W transients, protecting downstream PMICs and microcontrollers rated for 60 V absolute max. |
Use Scenario: Analog output lines (e.g., 4–20 mA, 0–10 V) from pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) TVS mounted at connector entry to suppress ESD (IEC 61000-4-2 ±8 kV) and cable-coupled noise. Use Value: Prevents latch-up or damage to precision op-amps and ADC front-ends while maintaining signal integrity via minimal leakage (<1 µA at 47.8 V). |
| DC-DC Converter Input Stage | Telecom Power Feeding Interface |
|
Use Scenario: Input stage of isolated 48 V–12 V buck converters in telecom base station power supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp ahead of MOSFET switch and controller IC, triggered by input capacitor ringing or upstream fault. Use Value: Absorbs 1500 W surges without degradation, enabling use of lower-voltage-rated input capacitors and reducing BOM cost. |
Use Scenario: Power-over-Ethernet (PoE) midspan injectors supplying 57 V DC to remote access points or IP cameras. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part protects DC feed line against reverse-polarity miswiring and inductive kickback. Use Value: Withstands 200 A 8.3 ms forward surge (IFSM), preventing fuse blowout during hot-plug insertion or cable short recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A-E3/52T | Same VBR/VC specs but SMB (DO-214AA) package - 30 % smaller footprint, 1000 W PPPM | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump | Select when board space is critical and surge energy is ≤1000 W (e.g., consumer USB-C PD protection) |
| 1.5KE56A | Through-hole DO-201 package; identical electrical specs but higher RθJA (≈100 °C/W) and no AEC-Q101 rating | Not qualified for automotive; requires wave solder or hand-solder; less suitable for automated SMT lines | Choose for legacy through-hole designs or cost-sensitive industrial controls where AEC-Q101 is not mandated |
Compared with SMBJ56A-E3/52T and 1.5KE56A, the 1.5SMC56AHE3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC package - making it the only option validated for high-reliability automotive power rail protection with automated assembly support.
Availability
1.5SMC56AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interface modules, and telecom power supply input stages requiring stable component supply, AEC-Q101 traceability, and consistent SMC (DO-214AB) packaging.
Supply support for 1.5SMC56AHE3_A/H 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, ruggedness, and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the 1.5SMC56AHE3_A/H under maximum rated surge current?
The 1.5SMC56AHE3_A/H has a maximum clamping voltage (VC) of 77.0 V at 19.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on the protected circuit during a full-rated transient event. The 1.5SMC56AHE3_A/H maintains this clamping performance across its qualified temperature range (–65 °C to +150 °C), ensuring consistent protection in automotive and industrial deployments.
Is the 1.5SMC56AHE3_A/H suitable for automotive applications?
Yes, the 1.5SMC56AHE3_A/H is AEC-Q101 qualified, explicitly designated for automotive use with suffix "HE3" indicating RoHS-compliant and AEC-Q101-qualified construction. It meets stress test requirements for temperature cycling, humidity bias, and mechanical shock relevant to engine bay and chassis-mounted ECUs. The 1.5SMC56AHE3_A/H is commonly used in powertrain control modules, body electronics, and ADAS sensor interfaces where sustained reliability under transient stress is mandatory.
What does the "_A/H" suffix mean in 1.5SMC56AHE3_A/H?
The "_A/H" suffix in 1.5SMC56AHE3_A/H indicates two attributes: "A" denotes the revision level (per Vishay's ordering matrix, _A is available for 1.5SMC6.8A to 1.5SMC220A variants), and "H" specifies the packaging format - 7-inch diameter plastic tape and reel with 850 units per reel. This matches Vishay's standard SMC tape-and-reel delivery for automated pick-and-place assembly. The 1.5SMC56AHE3_A/H is not a functional variant but a specific manufacturing and packaging configuration of the base 1.5SMC56AHE3 device.
How does the thermal performance of the 1.5SMC56AHE3_A/H affect PCB layout?
The 1.5SMC56AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured on 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤150 °C under 6.5 W steady-state dissipation, PCB layout must allocate ≥64 mm² of 2-oz copper per pad, with internal thermal vias recommended for high-power surge scenarios. The 1.5SMC56AHE3_A/H datasheet specifies this pad layout as minimum; undersized copper increases thermal impedance and risks premature thermal runaway during repetitive transients.
Can the 1.5SMC56AHE3_A/H be used in bidirectional configurations?
No, the 1.5SMC56AHE3_A/H is a unidirectional TVS diode, indicated by the "A" suffix (vs. "CA" for bidirectional). Its cathode band marks the polarity-sensitive terminal, and it conducts only in reverse breakdown - forward conduction is limited to 3.5 V at 100 A (per note 5). For bidirectional protection (e.g., AC lines or differential pairs), the 1.5SMC56CAHE3 variant must be selected. Using the 1.5SMC56AHE3_A/H in bidirectional applications risks forward conduction failure or inadequate clamping during negative transients.
1.5SMC56AHE3_A/H 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:
- Active
- 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_A/H FAQ
1.How can I place an order for 1.5SMC56AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56AHE3_A/H 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_A/H reliable?
The price and inventory of 1.5SMC56AHE3_A/H 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_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC56AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56AHE3_A/H?
1.5SMC56AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56AHE3_A/H 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_A/H?
For technical support, including 1.5SMC56AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC56AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56AHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC56AHE3_A/H?
All 1.5SMC56AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56AHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC56AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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