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Vishay General Semiconductor - Diodes Division SMCJ170CA-E3/57T
- Part No.:
- SMCJ170CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CA-E3/57T.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,328
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Product details
Overview
SMCJ170CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 170 V standoff voltage (VWM), and clamping voltage of 275 V at 5.5 A peak pulse current. It protects sensitive ICs and MOSFETs in automotive power systems, industrial motor controls, and telecom interface lines.
For engineers reviewing the SMCJ170CA-E3/57T datasheet, SMCJ170CA-E3/57T pinout, SMCJ170CA-E3/57T application, or SMCJ170CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge rating, 170 V working voltage, RoHS-compliant E3 termination, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This device operates as a voltage-clamped crowbar during transient overvoltage events, leveraging avalanche breakdown across both polarities to limit voltage excursions to ≤275 V under 10/1000 μs surges. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 170 V).
Thermal design relies on low RθJL (15 °C/W) and moderate RθJA (75 °C/W), requiring minimum 8.0 mm × 8.0 mm copper pads per terminal for full 1500 W rating. It meets MSL Level 1 and JESD201 Class 2 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping initiates |
| VC @ IPPM | 275 V - Clamped voltage at 5.5 A peak pulse current (10/1000 μs waveform) |
| PPPM | 1500 W - Peak pulse power handling capacity under standardized surge conditions |
| IPPM | 5.5 A - Maximum non-repetitive surge current supported at rated clamping voltage |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| Leakage @ VWM | <1.0 μA - Low reverse leakage preserves signal integrity in high-impedance circuits |
Pinout & Package
SMCJ170CA-E3/57T uses a two-terminal SMC (DO-214AB) package with no polarity marking - consistent with bidirectional TVS construction. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction |
| Case (body) | Non-electrical mechanical structure | DO-214AB molded epoxy body provides UL94 V-0 flammability rating and mechanical robustness |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when properly mounted on 8 mm × 8 mm copper pads |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for downstream ICs |
| MSL Level 1 rating | Allows unlimited floor life and reflow compatibility up to 260 °C peak without baking |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive applications requiring stress-tested reliability |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in engine control units against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp limiting rail excursions to ≤275 V during 100 ms load-dump events. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers powered from protected rails. |
Use Scenario: Safeguarding gate drivers and current-sense amplifiers connected to IGBT half-bridges in variable-frequency drives. IC Role / Device Role / Timing Role: Fast-response shunt suppressor absorbing switching-induced dv/dt spikes on DC bus and control lines. Use Value: Reduces false triggering and extends lifetime of isolated gate drivers by limiting transient overvoltage to safe levels. |
| Telecom Line Interface Protection | Consumer Equipment AC-DC Input Stage |
Use Scenario: Shielding Ethernet PHYs and RS-485 transceivers from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level surge arrestor placed before common-mode chokes and secondary TVS arrays. Use Value: Absorbs >90 % of 10/1000 μs surge energy before it reaches signal conditioning circuitry. |
Use Scenario: Secondary-side clamping on DC outputs of wall adapters and USB PD chargers exposed to user-handling ESD. IC Role / Device Role / Timing Role: Final-stage protector clamping output overvoltage caused by feedback loop failure or capacitor short. Use Value: Limits fault voltage to <275 V, preventing fire hazard and ensuring compliance with IEC 62368-1 secondary circuit limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC170CA | Same 170 V VWM, but lower 1000 W PPPM; smaller SMA package (DO-214AC) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤Level 3 |
| SMCJ170A-E3/57T | Unidirectional version; identical VWM, PPPM, and package; includes cathode band marking | Requires correct polarity placement; not usable on AC or floating nodes | Choose only for DC rails with known, fixed polarity and where cost savings justify layout verification |
Compared with SAC170CA and SMCJ170A-E3/57T, the SMCJ170CA-E3/57T uniquely delivers 1500 W bidirectional clamping in SMC package - making it the only option among the three suitable for high-threat, polarity-agnostic protection in automotive and industrial power domains.
Availability
SMCJ170CA-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom line interface protection, and consumer equipment AC-DC input stage applications requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ170CA-E3/57T 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, thermal performance, and automotive-grade qualification.
The SMCJ series was engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where 1500 W surge immunity and AEC-Q101 readiness are mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ170CA-E3/57T?
The "CA" suffix denotes a bidirectional configuration, meaning the SMCJ170CA-E3/57T provides symmetrical clamping for both positive and negative voltage transients without polarity dependence. Unlike unidirectional variants (e.g., SMCJ170A), it has no cathode marking and functions identically regardless of terminal orientation - essential for protecting AC-coupled or floating signal paths.
Is SMCJ170CA-E3/57T AEC-Q101 qualified?
The SMCJ170CA-E3/57T itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101 qualified versions under HE3 and HM3 ordering codes (e.g., SMCJ170CAHE3_A). These variants undergo additional stress testing per AEC-Q101 and are designated for automotive applications - while maintaining identical electrical specs and SMC package dimensions as the SMCJ170CA-E3/57T.
What is the maximum clamping voltage for SMCJ170CA-E3/57T under surge conditions?
The SMCJ170CA-E3/57T clamps to a maximum of 275 V when subjected to its rated 5.5 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number 88394, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can SMCJ170CA-E3/57T replace SMCJ170A-E3/57T in an existing design?
No direct replacement is possible without layout review: SMCJ170CA-E3/57T is bidirectional and unmarked, whereas SMCJ170A-E3/57T is unidirectional with a cathode band. Substituting them requires verifying that the circuit node is polarity-agnostic (e.g., differential lines or floating grounds); otherwise, incorrect placement of the bidirectional part may compromise protection effectiveness or cause unintended conduction.
What PCB pad layout is required to achieve the full 1500 W rating of SMCJ170CA-E3/57T?
To sustain the full 1500 W peak pulse power rating, the SMCJ170CA-E3/57T must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads - one per terminal - as specified in Vishay's datasheet Figure 2 derating curves. Smaller pads reduce thermal dissipation and require proportional derating of surge current capability.
SMCJ170CA-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ170CA-E3/57T FAQ
1.How can I place an order for SMCJ170CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CA-E3/57T 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 SMCJ170CA-E3/57T reliable?
The price and inventory of SMCJ170CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ170CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CA-E3/57T?
SMCJ170CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CA-E3/57T 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 SMCJ170CA-E3/57T?
For technical support, including SMCJ170CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ170CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ170CA-E3/57T 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 SMCJ170CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ170CA-E3/57T?
All SMCJ170CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CA-E3/57T, 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 SMCJ170CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ170CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170CA-E3/57T Tags
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