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Vishay General Semiconductor - Diodes Division 1.5SMC170CA-E3/9AT
- Part No.:
- 1.5SMC170CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170CA-E3/9AT.pdf
- Description:
- TVS DIODE 145VWM 234VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,406
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Product details
Overview
1.5SMC170CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power with 10/1000 μs waveform, 170 V standoff voltage (VWM), and 234 V maximum clamping voltage (VC) at 6.4 A peak pulse current - deployed for lightning and inductive-switching surge protection on automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the 1.5SMC170CA-E3/9AT datasheet, 1.5SMC170CA-E3/9AT pinout, 1.5SMC170CA-E3/9AT application, or 1.5SMC170CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 moisture sensitivity, RoHS-compliant matte tin plating, and AEC-Q101 qualification readiness via HE3 suffix variants.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior during positive and negative transients - confirmed by electrical characteristics applying "in both directions" per Vishay documentation. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMC package supports automated placement and meets UL 94 V-0 flammability rating.
Thermal performance is defined by RθJA = 75 °C/W (junction-to-ambient, typical) and RθJL = 15 °C/W (junction-to-leads), enabling reliable operation up to TJ = 150 °C. The device is rated for repetitive 0.01% duty cycle surges and derates linearly above 25 °C ambient per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 170 V - Maximum continuous reverse voltage before conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 162–179 V at 1 mA - Confirmed symmetrical breakdown range for bidirectional operation; ensures consistent turn-on in either polarity. |
| VC (Clamping) | 234 V at IPPM = 6.4 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress level. |
| PPPM | 1500 W - Peak transient energy absorption capability under standardized 10/1000 μs waveform; validates robustness against lightning-induced surges. |
| ID (Leakage) | 1.0 μA max at VWM - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive and industrial environments without thermal derating penalties. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement; supports high-current PCB routing and automated assembly. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. Bidirectional construction means no polarity marking; terminals are functionally interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative half-cycle) | Conducts surge current during negative transients; forms symmetrical path with Cathode for full-wave clamping. |
| Cathode | Transient current entry point (positive half-cycle) | Conducts surge current during positive transients; paired with Anode to enable bidirectional protection without external polarity management. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both polarities - eliminates need for polarity-aware layout or external diode bridges in AC-coupled or floating signal paths. |
| 1500 W peak pulse power | Validated with 10/1000 μs waveform - meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive electronics. |
| Glass passivated junction | Stable, repeatable breakdown with <1 ns response time - prevents overshoot during fast-rising ESD or switching transients (e.g., ISO 10605). |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C / 60% RH - allows direct placement without baking or dry-pack handling, reducing manufacturing overhead. |
| RoHS-compliant & halogen-free options | E3 suffix denotes RoHS-compliant commercial grade; M3 suffix adds halogen-free compliance - satisfies environmental mandates for global OEM programs. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt surge energy before it reaches sensitive analog front-ends or communication ICs. Use Value: Maintains signal integrity under ±170 V standoff while clamping to ≤234 V - preventing damage to 5 V or 3.3 V rail-connected components without adding series impedance. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoids, relays, and motor drives. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on 24 V DC field wiring, mounted adjacent to terminal block to minimize inductance in surge path. Use Value: Absorbs 1500 W surges with <1 ns response - outperforming MOVs in speed and repeatability, and avoiding degradation after repeated events. |
| Telecom Line Interface | Consumer Power Adapter EMI Filtering |
Use Scenario: Shielding Ethernet PHYs and DSL line drivers from induced surges on outdoor cabling in residential gateways and base stations. IC Role / Device Role / Timing Role: Secondary protection stage following gas discharge tube (GDT), providing low-clamp refinement and fast response for residual transients. Use Value: Symmetrical 170 V standoff matches common telecom line voltage margins; 234 V clamping ensures PHYs remain within absolute maximum ratings during combined lightning + GDT follow-on current. |
Use Scenario: Suppressing differential-mode noise and surge coupling between primary and secondary sides in isolated AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Bidirectional clamp across secondary-side DC output rails (e.g., 5 V, 12 V) to prevent overvoltage propagation into USB ports or microcontrollers. Use Value: Low leakage (<1 μA) avoids loading regulated outputs; SMC package fits tight board spaces near output connectors without compromising creepage/clearance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA | Same VWM (170 V) and bidirectional configuration, but lower PPPM (600 W) and smaller SMB package (DO-214AA); RθJA = 85 °C/W. | Limited to lower-energy surges (e.g., ESD, low-level switching noise); unsuitable for IEC 61000-4-5 Level 4. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 or system-level ESD only. |
| 1.5KE170CA | Through-hole TO-204AE (DO-201AE) package; same 170 V VWM and 234 V VC, but higher thermal mass and RθJA = 10 °C/W on large pads. | Requires through-hole assembly; better sustained power handling but incompatible with fully SMT production lines. | Choose for legacy designs or high-reliability applications where manual rework access or thermal cycling robustness outweighs SMT efficiency. |
Compared with SMBJ170CA and 1.5KE170CA, the 1.5SMC170CA-E3/9AT delivers optimal balance of high-energy surge capability (1500 W), SMT manufacturability, and automotive-grade reliability - making it the preferred choice for new industrial and automotive designs requiring AEC-Q101-ready, RoHS-compliant TVS protection in compact form factor.
Availability
1.5SMC170CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer power adapter output protection requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5SMC170CA-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, precision, and application-specific optimization.
The 1.5SMC Series targets high-power transient suppression in demanding environments - engineered for automotive, industrial, and telecom systems where robustness against lightning, load dump, and inductive switching is non-negotiable.
FAQ
What does the "CA" suffix mean in 1.5SMC170CA-E3/9AT?
The "CA" suffix in 1.5SMC170CA-E3/9AT explicitly denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., 1.5SMC170A), this part provides symmetrical clamping in both polarities - essential for protecting AC-coupled, floating, or differential signal lines without polarity constraints. Electrical characteristics apply identically in forward and reverse directions.
Is 1.5SMC170CA-E3/9AT AEC-Q101 qualified?
The 1.5SMC170CA-E3/9AT itself is RoHS-compliant commercial-grade (E3 suffix) and not AEC-Q101 qualified. However, Vishay offers AEC-Q101-qualified versions under HE3 (e.g., 1.5SMC170CAHE3_A/I) - identical electrical specs with added automotive reliability testing. For automotive production, specify the HE3 or HM3 suffix variant instead of E3.
What is the maximum clamping voltage of 1.5SMC170CA-E3/9AT and at what current is it specified?
The maximum clamping voltage (VC) of 1.5SMC170CA-E3/9AT is 234 V, measured at the peak pulse current (IPPM) of 6.4 A under the standard 10/1000 μs double-exponential waveform. This value represents the worst-case voltage imposed on the protected circuit during a full-rated surge event and is critical for ensuring downstream ICs remain within their absolute maximum ratings.
Can 1.5SMC170CA-E3/9AT be used in place of a unidirectional TVS like 1.5SMC170A?
No - 1.5SMC170CA-E3/9AT is strictly bidirectional and lacks polarity marking, whereas 1.5SMC170A is unidirectional with cathode band identification. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating grounds, while unidirectional parts are required for DC-biased rails where reverse conduction must be blocked. Interchange introduces risk of unintended conduction or inadequate protection.
What is the thermal resistance and how does it affect PCB layout for 1.5SMC170CA-E3/9AT?
The 1.5SMC170CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surges, PCB layout must replicate this minimum pad area and use internal ground/power planes for heat spreading - undersized pads cause thermal runaway and premature failure during sustained transient events.
1.5SMC170CA-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):
- 145V
- Voltage - Breakdown (Min):
- 162V
- Voltage - Clamping (Max) @ Ipp:
- 234V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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)
1.5SMC170CA-E3/9AT FAQ
1.How can I place an order for 1.5SMC170CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170CA-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 1.5SMC170CA-E3/9AT reliable?
The price and inventory of 1.5SMC170CA-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 1.5SMC170CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC170CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170CA-E3/9AT?
1.5SMC170CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170CA-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 1.5SMC170CA-E3/9AT?
For technical support, including 1.5SMC170CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC170CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170CA-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 1.5SMC170CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC170CA-E3/9AT?
All 1.5SMC170CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170CA-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 1.5SMC170CA-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC170CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170CA-E3/9AT Tags
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