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Vishay General Semiconductor - Diodes Division 1.5SMC47CA-E3/9AT
- Part No.:
- 1.5SMC47CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47CA-E3/9AT.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,455
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Product details
Overview
1.5SMC47CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 47 V standoff voltage (VWM), 64.8 V maximum clamping voltage (VC) at 23.1 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC47CA-E3/9AT datasheet, 1.5SMC47CA-E3/9AT pinout, 1.5SMC47CA-E3/9AT application, or 1.5SMC47CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 moisture sensitivity, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This device operates as a voltage-clamped crowbar during transients: when reverse (or forward, in bidirectional mode) voltage exceeds its breakdown threshold (~49.4 V min, ~53.6 V max at 1 mA), it avalanches to limit downstream voltage to ≤64.8 V. Its glass-passivated junction ensures stable leakage (<1.0 μA at 40.2 V) and fast response (<1.0 ns).
Thermally, it sustains 150 °C junction temperature with 75 °C/W junction-to-ambient thermal resistance (RθJA) on standard 8.0 mm × 8.0 mm copper pads. The SMC (DO-214AB) package supports automated placement and meets UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 40.2 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC working margin. |
| VBR (Breakdown) | 44.7–49.4 V at 1 mA - Voltage range where avalanche conduction initiates; ensures predictable turn-on across production lot. |
| VC (Clamping) | 64.8 V at 23.1 A - Maximum voltage seen by protected circuit during 10/1000 μs surge; directly limits stress on downstream ICs. |
| PPPM | 1500 W - Peak transient energy absorption capability under standardized 10/1000 μs waveform; enables protection against lightning-induced surges. |
| Package | SMC (DO-214AB) - Surface-mount package with 3.2 mm min. lead length, 7.75 mm max. body length; compatible with IPC-7351B land patterns. |
| Temperature Range | −65 °C to +150 °C - Full operational and storage range; supports under-hood automotive and industrial ambient conditions. |
| Leakage (ID) | ≤1.0 μA at VWM - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity required in layout. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; enables symmetric placement across differential or single-ended lines without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., RS-485), or ungrounded signal paths without polarity concerns. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 50 Ω lines - sufficient for industrial and automotive power rail protection. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without baking; eliminates pre-conditioning requirements in high-volume SMT lines. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure - critical for automotive and outdoor equipment. |
| AEC-Q101 qualification path | HE3/HM3 suffix variants are AEC-Q101 qualified; this E3/9AT variant shares identical die and construction - suitable for automotive-grade design-in with qualification support. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within <1 ns to transients exceeding 40.2 V. Use Value: Limits induced surge voltage to ≤64.8 V, preventing latch-up or gate oxide damage in connected microcontrollers and analog front-ends. |
Use Scenario: Safeguarding RS-485 transceivers (e.g., SN65HVD230) against ESD (IEC 61000-4-2) and fast transients (IEC 61000-4-4) on data lines. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per line) providing symmetrical clamping to common-mode and differential-mode surges. Use Value: Maintains signal integrity below 64.8 V clamping level while adding <1 pF junction capacitance - negligible impact on 250 kbps–10 Mbps data rates. |
| Telecom Power Input | Consumer USB Port Protection |
Use Scenario: Front-end surge suppression on 48 V DC telecom power inputs exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping device in series with upstream fuse and parallel with bulk capacitor; conducts 23.1 A peak current during 10/1000 μs event. Use Value: Absorbs 1500 W transient energy without degradation, enabling compliance with GR-1089-CORE Level 3 (2 kV line-earth). |
Use Scenario: Overvoltage protection on VBUS and D+/D− lines of USB 2.0 ports in set-top boxes and smart displays against hot-plug and ESD events. IC Role / Device Role / Timing Role: Bidirectional TVS placed between each line and ground; leverages symmetry to protect both positive and negative transients on shared lines. Use Value: Delivers sub-100 ns response and ≤1.0 μA leakage at 5 V - avoids false triggering while preserving battery life in always-on devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47CA | Same 47 V VWM and bidirectional function, but SMB package (DO-214AA); lower PPPM (600 W) and IPPM (12.3 A). | Lower surge capacity suits consumer-grade USB or low-energy signal lines; insufficient for industrial 48 V power rail protection. | Select SMBJ47CA only when board space is constrained and surge threat level is limited to IEC 61000-4-2 ±15 kV contact discharge. |
| 1.5KE47CA | Through-hole DO-201AE package; same 47 V VWM and 64.8 V VC, but higher thermal mass and RθJA (50 °C/W on FR-4). | Better sustained power handling in non-SMT legacy designs; incompatible with automated SMT assembly and high-density layouts. | Choose 1.5KE47CA for prototyping, repair, or through-hole-only systems where reflow compatibility and footprint density are not required. |
Compared with SMBJ47CA and 1.5KE47CA, the 1.5SMC47CA-E3/9AT delivers optimal balance of high-energy surge immunity (1500 W), SMT manufacturability, and bidirectional symmetry - making it the preferred choice for volume automotive and industrial PCBs requiring AEC-Q101 alignment and RoHS compliance.
Availability
1.5SMC47CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and telecom power input stages requiring stable component supply, full traceability, and long-term lifecycle continuity.
Supply support for 1.5SMC47CA-E3/9AT 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, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturing.
The 1.5SMC Series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, consistency, and AEC-Q101 readiness are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC47CA-E3/9AT under a 10/1000 μs surge?
The 1.5SMC47CA-E3/9AT has a maximum clamping voltage (VC) of 64.8 V at 23.1 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per Figure 1 in Vishay's 88303 datasheet and represents the upper bound of voltage imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC47CA-E3/9AT suitable for automotive applications?
Yes - the 1.5SMC47CA-E3/9AT uses the same die and construction as AEC-Q101-qualified variants (e.g., 1.5SMC47CAHE3_A); it is RoHS-compliant, rated for −65 °C to +150 °C operation, and meets MSL Level 1. While the E3/9AT suffix itself is commercial-grade, its design basis and test correlation support automotive use with appropriate qualification documentation from Vishay.
How does the bidirectional nature of the 1.5SMC47CA-E3/9AT affect PCB layout?
The 1.5SMC47CA-E3/9AT has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation alignment. This simplifies placement on differential lines (e.g., RS-485 A/B), AC-coupled signals, or ungrounded sensors - eliminating risk of reverse installation and reducing assembly error rates in high-volume SMT production.
What is the maximum leakage current of the 1.5SMC47CA-E3/9AT at its stand-off voltage?
At its 40.2 V stand-off voltage (VWM), the 1.5SMC47CA-E3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 μA, measured at 25 °C. This ultra-low leakage preserves signal fidelity in high-impedance sensor interfaces and minimizes quiescent power draw in battery-powered systems - confirmed in Table 1 of the Vishay 88303 datasheet.
Does the 1.5SMC47CA-E3/9AT require derating at elevated ambient temperatures?
Yes - the 1.5SMC47CA-E3/9AT must be derated above 25 °C ambient per Figure 2 in the Vishay 88303 datasheet. At 85 °C, its 1500 W peak pulse power drops to ~85 % of rated value; at 125 °C, it falls to ~50 %. Designers must apply these derating curves when sizing for sustained high-temperature environments like engine compartments or enclosed industrial enclosures.
1.5SMC47CA-E3/9AT 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC47CA-E3/9AT FAQ
1.How can I place an order for 1.5SMC47CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47CA-E3/9AT 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 1.5SMC47CA-E3/9AT reliable?
The price and inventory of 1.5SMC47CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC47CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC47CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47CA-E3/9AT?
1.5SMC47CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47CA-E3/9AT 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 1.5SMC47CA-E3/9AT?
For technical support, including 1.5SMC47CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC47CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47CA-E3/9AT 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 1.5SMC47CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC47CA-E3/9AT?
All 1.5SMC47CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47CA-E3/9AT, 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 1.5SMC47CA-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC47CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47CA-E3/9AT Tags
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