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Vishay General Semiconductor - Diodes Division 1.5SMC47AHE3_A/H
- Part No.:
- 1.5SMC47AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47AHE3_A/H.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,969
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Product details
Overview
1.5SMC47AHE3_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 47 V breakdown voltage (VBR = 44.7–49.4 V at IT = 1.0 mA), 40.2 V stand-off voltage (VWM), 64.8 V maximum clamping voltage (VC) at 23.1 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 1.5SMC47AHE3_A/H datasheet, 1.5SMC47AHE3_A/H pinout, 1.5SMC47AHE3_A/H application, or 1.5SMC47AHE3_A/H equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast response time, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial designs requiring repeatable transient suppression without derating penalties.
Technical Context
The 1.5SMC47AHE3_A/H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve stable reverse breakdown and precise clamping under repetitive transients. Its thermal resistance (RθJA = 75 °C/W, RθJL = 15 °C/W) supports operation up to TJ = +150 °C, with derating applied above TA = 25 °C per Fig. 2 of the datasheet.
It is rated for 10/1000 µs waveform compliance with 0.01 % duty cycle, delivering 23.1 A peak pulse current (IPPM) while limiting clamped voltage to ≤64.8 V - enabling effective protection of 48 V nominal systems against ISO 7637-2 pulses and lightning-induced surges. Polarity is marked by a cathode band on the SMC (DO-214AB) package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at IT = 1.0 mA - defines reliable avalanche initiation threshold for consistent clamping onset |
| VWM | 40.2 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 64.8 V at 23.1 A - clamped voltage during 1500 W transient, determining protected circuit's maximum stress level |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, defining surge energy absorption capacity |
| IPPM | 23.1 A - peak pulse current capability, directly sizing upstream fusing and PCB trace robustness |
| TJ max. | +150 °C - maximum junction temperature, enabling use in under-hood automotive environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for thermal performance |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V supply rail); band-marked end enables automated optical inspection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards |
| 1500 W peak pulse power | Supports EN 61000-4-5 Level 4 (4 kV) surge immunity without external series impedance in many 48 V applications |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during fast transients, reducing stress on downstream MOSFETs and controllers |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow assembly without prebake, compatible with high-volume SMT lines |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) across temperature and lifetime |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed control modules (e.g., ADAS camera ECU, body control unit) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V input and chassis ground, clamping transients within 1 ns. Use Value: Limits voltage excursion to ≤64.8 V during 1500 W surges, preventing damage to 65 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loop drivers) and digital I/O (CAN, LIN) in PLC I/O modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point, shunting induced surges before reaching precision op-amps or transceivers. Use Value: Clamps 1 kV/500 A surge to <65 V within nanoseconds, preserving signal integrity and avoiding latch-up in 3.3 V/5 V interface ICs. |
| Telecom DC Power Input Protection | Consumer Equipment AC/DC Adapter Output Protection |
|
Use Scenario: Securing -48 V telecom rectifier outputs feeding base station radios and remote radio units. IC Role / Device Role / Timing Role: Primary overvoltage clamp on the -48 V bus, coordinated with upstream fuse and secondary filtering. Use Value: Withstands repeated 10/1000 µs surges up to 1500 W, meeting Telcordia GR-1089-CORE requirements for central office equipment. |
Use Scenario: Adding secondary-side surge protection to USB PD and 24 V adapter outputs powering smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Final-stage TVS on regulated output rail, absorbing coupling noise from nearby switching circuits or ESD events. Use Value: Delivers <1 µA leakage at 40.2 V, ensuring no impact on standby power budget while suppressing >6 kV contact ESD per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ47A-E3/57T | Same 47 V VBR range but lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a/b in automotive | Select when board space is constrained and surge threat level is ≤400 W (e.g., consumer USB ports) |
| 1.5KE47A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or MSL Level 1 rating | Not suitable for automated SMT production or under-hood automotive deployment | Choose only for legacy through-hole designs or non-automotive industrial prototypes where reflow compatibility is not required |
Compared with SMAJ47A-E3/57T and 1.5KE47A, the 1.5SMC47AHE3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC package thermal performance - making it the only option among the three validated for high-volume automotive SMT assembly with full ISO 7637-2 compliance.
Availability
1.5SMC47AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 1.5SMC47AHE3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 compliance, and repeatable 1500 W surge handling are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC47AHE3_A/H under a 10/1000 µs surge?
The 1.5SMC47AHE3_A/H exhibits a maximum clamping voltage (VC) of 64.8 V when subjected to its rated peak pulse current of 23.1 A, corresponding to a 1500 W transient with a 10/1000 µs waveform. This value is measured per Figure 1 and Table 1 of the Vishay datasheet 88303 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the 1.5SMC47AHE3_A/H qualified for automotive applications?
Yes, the 1.5SMC47AHE3_A/H carries AEC-Q101 qualification, confirmed by its "HE3" suffix and documentation in Vishay's 1.5SMC Series datasheet (Rev. 09-Mar-2026). It meets stress test requirements for temperature cycling, humidity bias, and mechanical shock - making it suitable for under-hood and chassis-mounted automotive electronics.
What does the "_A/H" suffix mean in 1.5SMC47AHE3_A/H?
The "_A/H" suffix in 1.5SMC47AHE3_A/H indicates revision "A" and packaging in 7-inch diameter plastic tape and reel (code "H"), with a base quantity of 850 units per reel. This ordering code aligns with Vishay's standard SMC series packaging nomenclature defined in the Ordering Information table on page 3 of datasheet 88303.
How does the 1.5SMC47AHE3_A/H differ from bidirectional variants like 1.5SMC47CA?
The 1.5SMC47AHE3_A/H is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where reverse conduction must be blocked. In contrast, 1.5SMC47CA is bidirectional - symmetrical in both directions, used for AC lines or data buses like RS-485 - and lacks polarity marking. Their VBR, VWM, and VC values differ accordingly.
What is the thermal resistance of the 1.5SMC47AHE3_A/H, and how does it affect layout?
The 1.5SMC47AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads (RθJL) of 15 °C/W. To achieve rated power dissipation, the PCB must use minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal - as specified in the "Mechanical Data" section - otherwise thermal derating is required above TA = 25 °C.
1.5SMC47AHE3_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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 23.1A
- 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)
1.5SMC47AHE3_A/H FAQ
1.How can I place an order for 1.5SMC47AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47AHE3_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 1.5SMC47AHE3_A/H reliable?
The price and inventory of 1.5SMC47AHE3_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 1.5SMC47AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC47AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47AHE3_A/H?
1.5SMC47AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47AHE3_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 1.5SMC47AHE3_A/H?
For technical support, including 1.5SMC47AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC47AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47AHE3_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 1.5SMC47AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC47AHE3_A/H?
All 1.5SMC47AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47AHE3_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 1.5SMC47AHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC47AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47AHE3_A/H Tags
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