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Vishay General Semiconductor - Diodes Division SMCJ170CA-E3/9AT
- Part No.:
- SMCJ170CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CA-E3/9AT.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,616
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Product details
Overview
SMCJ170CA-E3/9AT 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, MOSFETs, and sensor signal lines in automotive, industrial, and telecom systems against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ170CA-E3/9AT datasheet, SMCJ170CA-E3/9AT pinout, SMCJ170CA-E3/9AT application, or SMCJ170CA-E3/9AT equivalent, key selection criteria include bidirectional clamping capability, 1500 W PPPM rating, 170 V VWM, RoHS-compliant matte tin-plated leads, and MSL Level 1 moisture sensitivity for automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds 170 V (VWM), it avalanches to clamp transient energy within 1 ns response time while maintaining low incremental surge resistance. Its bidirectional symmetry ensures identical clamping behavior across both polarities, eliminating polarity marking on the device body.
Thermal design relies on junction-to-lead thermal resistance of 15 °C/W and junction-to-ambient of 75 °C/W, requiring minimum 8.0 mm × 8.0 mm copper pads per terminal per Vishay's derating curves. It meets AEC-Q101 qualification when ordered with HE3/HM3 suffixes - the SMCJ170CA-E3/9AT is commercial-grade RoHS-compliant only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 189 V / 209 V at 1 mA - breakdown voltage range defining avalanche onset threshold |
| VC @ IPPM | 275 V at 5.5 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream circuitry |
| PPPM | 1500 W - peak pulse power handling capacity under standardized 10/1000 µs waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage current ensuring minimal standby power loss and signal integrity |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ170CA-E3/9AT uses a 2-terminal SMC (DO-214AB) package with no polarity marking due to bidirectional construction. Terminals are matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive half-cycle) | Shunts positive-going surges to ground via avalanche conduction; symmetric with cathode |
| Cathode | Transient current entry point (negative half-cycle) | Shunts negative-going surges to ground via identical avalanche conduction; no band marking |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance in both directions eliminates need for orientation-aware PCB layout |
| 1500 W peak pulse power | Withstands high-energy transients such as ISO 7637-2 Pulse 5a without degradation when mounted on 8 mm × 8 mm copper pads |
| 1 ns response time | Clamps ESD and fast-rising surges before sensitive logic or analog circuitry sustains damage |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking, simplifying high-volume SMT manufacturing |
| Glass passivated junction | Ensures stable breakdown characteristics and long-term reliability under repeated surge stress |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Shunt TVS device clamping voltage spikes up to 120 V above nominal rail during ISO 7637-2 Pulse 5a events. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers by limiting rail voltage to ≤275 V during 1500 W surges. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in pressure/temperature sensors exposed to field wiring surges. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal and return lines to suppress ±1 kV EFT bursts per IEC 61000-4-4. Use Value: Maintains signal fidelity by limiting differential-mode transients to <275 V while adding <1 pF capacitance at 0 V bias. |
| Telecom Line Card Surge Protection | Consumer Device USB/DC Input Protection |
Use Scenario: Front-end protection for PoE-powered Ethernet switches against lightning-induced common-mode surges on RJ45 lines. IC Role / Device Role / Timing Role: Paired bidirectional TVS devices on each twisted pair, referenced to chassis ground to divert surge current away from PHY ICs. Use Value: Enables compliance with ITU-T K.21 basic protection level by clamping 10/1000 µs surges to ≤275 V at 5.5 A without follow-on conduction. | Use Scenario: DC input protection for smart home hubs accepting 12–24 V wall adapters vulnerable to accidental AC mains contact or hot-plug transients. IC Role / Device Role / Timing Role: Primary shunt protector on main DC input rail upstream of DC-DC converters and LDOs. Use Value: Absorbs up to 1500 W of transient energy to prevent overvoltage shutdown or internal FET failure in power management ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC170CA | Lower PPPM (600 W), same VWM (170 V), smaller SMA package (DO-214AC) | Not suitable for 1500 W surge requirements; limited to lower-energy IEC 61000-4-5 Level 3 events | Select only if board space is constrained and surge threat level is ≤600 W |
| SMCJ170A-E3/9AT | Unidirectional version; includes cathode band marking; identical VWM, VC, and PPPM | Requires correct polarity placement; unsuitable for AC-coupled or floating signal lines | Choose only when protecting DC rails where polarity is fixed and reverse conduction must be blocked |
Compared with SAC170CA and SMCJ170A-E3/9AT, the SMCJ170CA-E3/9AT uniquely delivers 1500 W bidirectional clamping in SMC package - essential for robust protection of AC-signals, differential buses, and polarity-agnostic power inputs without layout constraints.
Availability
SMCJ170CA-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom line card surge protection, and consumer device DC input protection requiring stable component supply and full traceability.
Supply support for SMCJ170CA-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, power efficiency, and automotive-grade qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting design-in for automotive, industrial, and telecom infrastructure where immunity to ISO 7637, IEC 61000-4-2/4/5, and lightning-induced surges is mandatory.
FAQ
What is the clamping voltage of SMCJ170CA-E3/9AT at its rated peak pulse current?
The SMCJ170CA-E3/9AT has a maximum clamping voltage (VC) of 275 V when subjected to its peak pulse current (IPPM) of 5.5 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ170CA-E3/9AT maintains this clamping performance identically in both directions due to its bidirectional construction.
Is SMCJ170CA-E3/9AT qualified to AEC-Q101 for automotive use?
No, the SMCJ170CA-E3/9AT is a commercial-grade RoHS-compliant part with E3 suffix and is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101 certification, the equivalent part is SMCJ170CAHE3_A/I (with HE3 suffix), which undergoes additional stress testing per the AEC-Q101 standard. The SMCJ170CA-E3/9AT remains suitable for non-automotive industrial and telecom designs where qualification is not mandated.
What is the thermal resistance of SMCJ170CA-E3/9AT and how does it affect PCB layout?
The SMCJ170CA-E3/9AT has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W. To achieve rated 1500 W pulse power, Vishay specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Reducing pad area increases thermal impedance, derating both peak power and safe operating duration - the SMCJ170CA-E3/9AT must be laid out per the recommended pad dimensions to meet datasheet specifications.
Does SMCJ170CA-E3/9AT have polarity markings on its package?
No, the SMCJ170CA-E3/9AT has no polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMCJ170A-E3/9AT) that feature a cathode band, the CA suffix indicates symmetrical avalanche behavior in both directions - meaning either terminal can serve as anode or cathode depending on transient polarity. This eliminates orientation errors during automated placement and simplifies layout for AC-coupled or floating circuits.
What is the maximum leakage current of SMCJ170CA-E3/9AT at its standoff voltage?
The SMCJ170CA-E3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 µA when biased at its standoff voltage (VWM) of 170 V and ambient temperature of 25 °C. This ultra-low leakage ensures negligible power loss in standby mode and prevents signal distortion in high-impedance sensor interfaces. The SMCJ170CA-E3/9AT maintains this specification across its full operating temperature range of −55 °C to +150 °C, supporting reliable performance in extreme environments.
SMCJ170CA-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SMCJ170CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CA-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 SMCJ170CA-E3/9AT reliable?
The price and inventory of SMCJ170CA-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 SMCJ170CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ170CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CA-E3/9AT?
SMCJ170CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CA-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 SMCJ170CA-E3/9AT?
For technical support, including SMCJ170CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ170CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ170CA-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 SMCJ170CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ170CA-E3/9AT?
All SMCJ170CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CA-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 SMCJ170CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ170CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170CA-E3/9AT Tags
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