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Vishay General Semiconductor - Diodes Division SMCJ170CA-M3/57T
- Part No.:
- SMCJ170CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CA-M3/57T.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,301
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Product details
Overview
SMCJ170CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features a 170 V standoff voltage (VWM), 275 V clamping voltage (VC) at 5.5 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform. It is used to protect sensitive MOSFETs, ICs, and sensor interfaces in industrial motor drives and automotive ECUs.
For engineers reviewing the SMCJ170CA-M3/57T datasheet, SMCJ170CA-M3/57T pinout, SMCJ170CA-M3/57T application, or SMCJ170CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge rating, SMC package thermal performance (RθJA = 75 °C/W), halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports fast clamping response under high di/dt conditions.
The device is rated for continuous operation from −55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 with peak reflow at 260 °C. It is not AEC-Q101 qualified (lacks HE3/HM3 suffix), distinguishing it from automotive-grade variants in the same family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 120–160 V DC bus applications. |
| VBR min/max | 189 V / 209 V at IT = 1.0 mA - verified breakdown range ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 275 V at 5.5 A - clamping voltage limits downstream component stress during 10/1000 μs surges; critical for IGBT/MOSFET gate protection. |
| PPPM | 1500 W - peak surge power handling with standard 10/1000 μs waveform; enables robust protection against lightning-induced and inductive-switching transients. |
| ID @ VWM | <1.0 μA - ultra-low reverse leakage preserves system efficiency and prevents false triggering in high-impedance sensing circuits. |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; optimized for thermal dissipation on 8.0 mm × 8.0 mm copper pads. |
| TJ max | +150 °C - maximum junction temperature rating supports reliable operation in enclosed industrial enclosures and under sustained load conditions. |
Pinout & Package
SMCJ170CA-M3/57T uses the SMC (DO-214AB) package: a two-terminal, symmetrical surface-mount case with no polarity marking (bidirectional). Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for full 1500 W rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (symmetrical) | Bidirectional conduction path - either terminal serves as anode or cathode depending on transient polarity; no functional distinction. |
| Terminal 2 | Anode/Cathode (symmetrical) | Identical to Terminal 1 - device exhibits identical V-I characteristics in both directions; enables placement without orientation check. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 24–48 V industrial control lines. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage overshoot during fast transients, reducing risk of gate oxide damage in protected MOSFETs. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and JEDEC J-STD-20 MSL Level 1 reflow profile for lead-free assembly. |
| Fast response time (<1.0 ps) | Clamps transients before propagation into downstream circuitry, preserving signal integrity in CAN, RS-485, and analog sensor paths. |
| −55 °C to +150 °C operating range | Supports deployment in under-hood automotive modules, outdoor telecom equipment, and factory-floor PLCs without derating. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of H-bridge gate drivers against inductive kickback from brushed DC motors. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across motor terminals and gate driver supply rails. Use Value: Limits transient spikes to ≤275 V, preventing latch-up or destruction of 200 V-rated MOSFETs during rapid PWM switching. |
Use Scenario: Surge suppression on LIN bus lines exposed to battery dump energy during alternator regulation faults. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing 10/1000 μs transients up to 1500 W without degradation. Use Value: Maintains LIN communication integrity by clamping line voltage to <300 V during ISO 7637-2 Pulse 5a events. |
| Telecom Power Feeds | Medical Sensor Interfaces |
Use Scenario: Input-stage protection for 48 V PoE-powered remote radio units subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail upstream of DC/DC converters and hot-swap controllers. Use Value: Absorbs >1000 W surges without failure, eliminating need for cascaded protection stages and reducing BOM count. |
Use Scenario: ESD and surge protection for analog front-end inputs of patient-monitoring ECG amplifiers. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) bidirectional clamp on differential sensor traces routed near noisy digital sections. Use Value: Prevents baseline shift and saturation during 8 kV contact ESD events while maintaining sub-nA bias current integrity. |
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 | Same VWM (170 V) and VC (275 V), but lower PPPM (600 W); SOD-123FL package (smaller footprint, higher RθJA). | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for motor drive snubbing or telecom feed protection. | Select when board space is constrained and surge threat level is defined as ≤600 W. |
| SMCJ170A-M3/57T | Unidirectional variant with identical VWM, VC, and PPPM; includes cathode band marking and forward voltage (VF = 3.5 V @ 100 A). | Requires polarity-aware layout; usable only where transients are known to be unidirectional (e.g., DC input rails with ground reference). | Choose only if system grounding architecture guarantees transient polarity and layout allows orientation control. |
Compared with SAC170CA and SMCJ170A-M3/57T, the SMCJ170CA-M3/57T uniquely delivers 1500 W bidirectional clamping in the industry-standard SMC package-enabling drop-in replacement in legacy SMC layouts while supporting the highest surge immunity class without polarity constraints.
Availability
SMCJ170CA-M3/57T is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and medical sensor interfaces requiring stable component supply, halogen-free compliance, and high-reliability surge protection.
Supply support for SMCJ170CA-M3/57T 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, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive qualification.
The SMCJ series was developed for high-power transient suppression in harsh environments, targeting industrial automation, transportation, and infrastructure systems where 1500 W surge immunity and extended temperature operation are mandatory.
FAQ
What is the clamping voltage of SMCJ170CA-M3/57T at its rated peak pulse current?
The SMCJ170CA-M3/57T has a maximum clamping voltage (VC) of 275 V at 5.5 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88394, ensuring consistent overvoltage limiting for protected downstream components such as MOSFETs and interface ICs. The SMCJ170CA-M3/57T maintains this clamping performance across its full operating temperature range.
Is SMCJ170CA-M3/57T suitable for automotive applications requiring AEC-Q101 qualification?
No, the SMCJ170CA-M3/57T is not AEC-Q101 qualified. Its M3 suffix indicates halogen-free RoHS compliance and commercial-grade reliability, but it lacks the HE3 or HM3 suffix required for automotive qualification. For AEC-Q101 applications, engineers must select variants like SMCJ170CAHM3_X (where "_X" denotes revision code), which undergo additional stress testing and lot traceability. The SMCJ170CA-M3/57T remains appropriate for industrial and telecom use cases where AEC-Q101 is not mandated.
How does the bidirectional design of SMCJ170CA-M3/57T affect PCB layout compared to unidirectional TVS diodes?
The SMCJ170CA-M3/57T has no polarity marking and identical electrical behavior in both directions, eliminating orientation constraints during automated placement. Unlike unidirectional types (e.g., SMCJ170A-M3/57T) that require cathode-band alignment, the SMCJ170CA-M3/57T can be placed in either direction on the PCB-reducing assembly errors and simplifying layout verification. This symmetry also avoids potential misapplication in AC-coupled or floating-ground systems where transient polarity is undefined. The SMCJ170CA-M3/57T thus lowers manufacturing risk without sacrificing protection performance.
What thermal derating applies to SMCJ170CA-M3/57T above 25 °C ambient temperature?
The SMCJ170CA-M3/57T follows Vishay's standard derating curve (Fig. 2 in Document 88394): peak pulse power decreases linearly from 1500 W at 25 °C to zero at 150 °C junction temperature. At 70 °C ambient with recommended 8.0 mm × 8.0 mm copper pads, the device retains ~85 % of rated PPPM (≈1275 W). Continuous power dissipation (PD = 6.5 W) also derates above 50 °C ambient per the RθJA = 75 °C/W thermal resistance. Designers must verify junction temperature using actual board layout and airflow in the SMCJ170CA-M3/57T application.
Can SMCJ170CA-M3/57T replace SMCJ150CA-M3/57T in an existing design without layout changes?
Yes, the SMCJ170CA-M3/57T is pin-to-pin compatible with SMCJ150CA-M3/57T-both use the identical SMC (DO-214AB) package, terminal configuration, and mounting pad requirements. However, the higher VWM (170 V vs. 150 V) and VC (275 V vs. 243 V) mean the SMCJ170CA-M3/57T will activate later and clamp at a higher voltage. This substitution is valid only if the protected circuit can tolerate the increased let-through voltage and if the surge threat profile justifies the higher standoff. The SMCJ170CA-M3/57T retains all mechanical and thermal interface properties of the SMCJ150CA-M3/57T.
SMCJ170CA-M3/57T 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 (SMC)
SMCJ170CA-M3/57T FAQ
1.How can I place an order for SMCJ170CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CA-M3/57T 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-M3/57T reliable?
The price and inventory of SMCJ170CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ170CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CA-M3/57T?
SMCJ170CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CA-M3/57T 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-M3/57T?
For technical support, including SMCJ170CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ170CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ170CA-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ170CA-M3/57T?
All SMCJ170CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CA-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ170CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170CA-M3/57T Tags
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