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Vishay General Semiconductor - Diodes Division 1.5SMC15CA-E3/9AT
- Part No.:
- 1.5SMC15CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15CA-E3/9AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,242
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Product details
Overview
1.5SMC15CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 15 V standoff voltage (VWM), 16.7 V minimum breakdown voltage (VBR), 21.2 V maximum clamping voltage (VC) at 70.8 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC15CA-E3/9AT datasheet, 1.5SMC15CA-E3/9AT pinout, 1.5SMC15CA-E3/9AT application, or 1.5SMC15CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 moisture sensitivity, RoHS-compliant matte tin terminations, and AEC-Q101 qualification readiness via HE3 suffix variants.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1000 µA leakage at 12.8 V), but triggers into low-impedance conduction when transient voltage exceeds VBR (14.3–15.8 V), limiting downstream voltage to ≤21.2 V at 70.8 A. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns).
Thermally, it uses the SMC (DO-214AB) package with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. The bidirectional configuration eliminates polarity concerns in AC-coupled or differential signal paths, and its 0.01% duty cycle rating supports repetitive surge handling in industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR (min/max) | 14.3 V / 15.8 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable triggering across temperature and unit variation |
| VC @ IPPM | 21.2 V at 70.8 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on protected IC or MOSFET gate |
| PPPM | 1500 W - Peak pulse power dissipation capability; validates suitability for lightning-induced transients per IEC 61000-4-5 |
| IPPM | 70.8 A - Peak pulse current supported at rated waveform; sets minimum trace width and PCB copper pad requirements (8.0 mm × 8.0 mm recommended) |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial enclosures |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 3.2 mm min. cathode/anode spacing; compatible with automated pick-and-place |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Conducts surge current in either direction; connects to protected line (e.g., CAN_H or RS-485 A) |
| Cathode | Transient current exit point (bidirectional) | Completes shunt path to ground or reference rail; symmetric with anode for AC applications |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485, CAN), and ungrounded power rails without polarity constraints |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV EFT, 2 kV surge) transients on 24 V industrial power inputs and data lines |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping - critical for protecting 16 V-rated automotive microcontrollers and 3.3 V/5 V logic |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk in high-volume SMT lines |
| AEC-Q101 qualification path | HE3/HM3 variants available - enables drop-in qualification for automotive body electronics, ADAS sensor interfaces, and infotainment power rails |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and chassis ground, triggered within <1 ns to clamp transients to safe levels. Use Value: Prevents latch-up or permanent damage to 5 V/12 V sensor front-ends while maintaining signal integrity due to low capacitance (<100 pF at 0 V). |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., MAX13487, SN65HVD72) against ESD and induced surges in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional clamping device across differential pair (A/B) or from each line to ground in fail-safe termination schemes. Use Value: Ensures communication continuity during 4 kV contact ESD events (IEC 61000-4-2) and 1 kV surge (IEC 61000-4-5) without bus shutdown or data corruption. |
| Telecom Line Interface | DC Power Input Protection |
|
Use Scenario: Shielding Ethernet PHY magnetics secondary side and POTS line drivers from lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point, absorbing >90% of 10/1000 µs surge energy before reaching isolation barrier. Use Value: Achieves compliance with GR-1089-CORE Zone 3 requirements using only one 1.5SMC15CA-E3/9AT per line pair, reducing BOM count vs. discrete Zener+capacitor solutions. |
Use Scenario: Guarding 12–24 V DC power inputs of programmable logic controllers (PLCs) and motor drives against reverse battery connection and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional shunt element across input rails, conducting both positive and negative transients to common ground plane. Use Value: Limits voltage excursion to ≤21.2 V during 100 A/10 ms inductive kick, preventing overvoltage failure of upstream DC-DC converters and MCU power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | Same VWM/VC, but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 90 °C/W) | Limited to lower-energy transients (e.g., ESD-only); unsuitable for IEC 61000-4-5 Level 3+ surge testing | Select when board space is constrained and surge threat level is limited to ±8 kV ESD (IEC 61000-4-2), not lightning-induced surges. |
| 1.5KE15CA | Same electrical specs, but axial-leaded DO-201 package; higher thermal mass but incompatible with SMT assembly | Requires through-hole rework or hybrid assembly; not suitable for fully automated production or high-density layouts | Choose only for prototyping, legacy repair, or low-volume applications where SMT is unavailable or thermal cycling reliability is secondary. |
Compared with SMBJ15CA and 1.5KE15CA, the 1.5SMC15CA-E3/9AT delivers optimal balance of high surge robustness (1500 W), SMT manufacturability, and thermal performance (RθJL = 15 °C/W) - making it the preferred choice for volume production of industrial and automotive electronics requiring repeatable, automated protection.
Availability
1.5SMC15CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface boards, and DC power supply inputs requiring stable component supply, full RoHS compliance, and long-term lifecycle support.
Supply support for 1.5SMC15CA-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, TVS devices, and optoelectronics with emphasis on reliability, precision, 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 systems where compact size, repeatable clamping, and AEC-Q101 qualification readiness are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC15CA-E3/9AT under a 10/1000 µs surge?
The 1.5SMC15CA-E3/9AT clamps to a maximum of 21.2 V when subjected to its rated peak pulse current of 70.8 A with a 10/1000 µs waveform. This value is guaranteed across temperature and unit-to-unit variation per Vishay's datasheet (Document Number 88303, page 2). The low clamping ratio (VC/VBR ≈ 1.4) ensures effective protection of downstream 15 V-tolerant circuitry without overstress.
Is the 1.5SMC15CA-E3/9AT suitable for automotive applications?
The 1.5SMC15CA-E3/9AT itself is RoHS-compliant commercial-grade; however, Vishay offers AEC-Q101 qualified versions under HE3/HM3 suffixes (e.g., 1.5SMC15CAHE3_A). For production automotive use, engineers should specify those qualified variants. The 1.5SMC15CA-E3/9AT shares identical electrical and thermal specs and serves as a direct drop-in for qualification testing and pre-compliance validation.
Does the 1.5SMC15CA-E3/9AT have polarity markings on the package?
No - the 1.5SMC15CA-E3/9AT is a bidirectional TVS diode and carries no polarity marking on the SMC (DO-214AB) case. Unlike unidirectional types (which feature a cathode band), this device functions identically regardless of orientation across the protected line, simplifying layout and eliminating installation errors in differential or AC-coupled circuits.
What is the maximum junction temperature rating for the 1.5SMC15CA-E3/9AT?
The 1.5SMC15CA-E3/9AT has a maximum junction temperature (TJ) rating of +150 °C, as specified in the Absolute Maximum Ratings table (page 2 of datasheet 88303). This allows reliable operation in under-hood automotive environments, enclosed industrial drives, and telecom base stations where ambient temperatures exceed 85 °C - provided PCB copper pads meet the 8.0 mm × 8.0 mm recommendation for thermal relief.
How does the 1.5SMC15CA-E3/9AT compare to unidirectional variants like 1.5SMC15A-E3/9AT?
The 1.5SMC15CA-E3/9AT is electrically symmetrical - it clamps equally in both directions with matched VBR, VC, and leakage - whereas the unidirectional 1.5SMC15A-E3/9AT conducts only from anode to cathode and requires correct polarity placement. Use the CA version for AC signals, differential buses (CAN, RS-485), or floating power rails; use the A version only for DC rails with defined ground reference and polarity.
1.5SMC15CA-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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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)
1.5SMC15CA-E3/9AT FAQ
1.How can I place an order for 1.5SMC15CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15CA-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 1.5SMC15CA-E3/9AT reliable?
The price and inventory of 1.5SMC15CA-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 1.5SMC15CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC15CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15CA-E3/9AT?
1.5SMC15CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15CA-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 1.5SMC15CA-E3/9AT?
For technical support, including 1.5SMC15CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC15CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15CA-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 1.5SMC15CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC15CA-E3/9AT?
All 1.5SMC15CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15CA-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 1.5SMC15CA-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC15CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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