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Vishay General Semiconductor - Diodes Division SMCJ17A-M3/57T
- Part No.:
- SMCJ17A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17A-M3/57T.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,808
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Product details
Overview
SMCJ17A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 27.6 V clamping voltage (VC) at 54.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the SMCJ17A-M3/57T datasheet, SMCJ17A-M3/57T pinout, SMCJ17A-M3/57T application, or SMCJ17A-M3/57T equivalent, key selection criteria include unidirectional polarity, halogen-free RoHS compliance (M3 suffix), 1500 W surge capability, junction temperature range (−55 °C to +150 °C), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
The SMCJ17A-M3/57T uses a glass-passivated silicon junction optimized for fast response (<1 ns) to transient events such as ESD, lightning-induced surges, and inductive switching spikes. Its low incremental surge resistance ensures stable clamping under high-current stress, while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Designed for unidirectional operation, it exhibits forward voltage drop of 3.5 V at 100 A (IF), reverse leakage ≤1.0 µA at 17 V (VWM), and thermal resistance of 75 °C/W (junction-to-ambient) on 8.0 mm × 8.0 mm copper pads - enabling reliable operation without heatsinking in moderate-power applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail protection threshold. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - guaranteed breakdown range ensures consistent turn-on across production lots. |
| VC @ IPPM | 27.6 V at 54.3 A - clamping voltage during 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 1500 W - peak pulse power handling capacity; enables protection against severe transients per IEC 61000-4-5. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.13 mm × 6.22 mm footprint and 2.62 mm height; compatible with J-STD-020 reflow. |
| Polarity | Unidirectional - cathode marked by band; blocks reverse conduction until breakdown, suitable for DC supply line protection. |
Pinout & Package
SMCJ17A-M3/57T is housed in the SMC (DO-214AB) package: a surface-mount, molded plastic case with matte tin-plated leads, compliant with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance. Polarity is indicated by a cathode band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge or bias conditions. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); initiates avalanche breakdown when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Withstands high-energy transients per 10/1000 µs waveform - meets IEC 61000-4-5 Level 4 requirements for industrial equipment. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during clamping - reduces risk of latch-up or damage to downstream MOSFETs and microcontrollers. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance mandates for automotive and EU industrial products without compromising surge performance. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture sensitivity concerns - eliminates pre-bake requirement. |
| AEC-Q101 qualified variant available | HE3/HM3 suffix versions are automotive-qualified; SMCJ17A-M3/57T is commercial-grade but shares identical electrical specs and package. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 12 V supply rail in BCM against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and LDO regulator input. Use Value: Clamps transients to ≤27.6 V, preventing regulator overvoltage shutdown and preserving MCU uptime. |
Use Scenario: Shields 24 V digital input circuitry from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Primary protection device ahead of optocoupler and Schmitt trigger input stage. Use Value: Limits voltage excursion to safe levels within 1 ns, ensuring reliable edge detection without false triggering. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Driver Board |
Use Scenario: Guards AC/DC adapter output against lightning-induced surges entering via PoE or auxiliary lines. IC Role / Device Role / Timing Role: Secondary-side TVS on +48 V output rail, downstream of primary isolation. Use Value: Absorbs 1500 W pulses without degradation, maintaining output regulation and avoiding brownout resets. |
Use Scenario: Suppresses inductive kickback from brushed DC motor commutation in washing machine control boards. IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals to clamp flyback voltage spikes. Use Value: Prevents MOSFET drain-source breakdown by limiting spike amplitude to 27.6 V, extending FET lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-M3 | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR/VC specs. | Used where board space is constrained and surge energy is limited (e.g., low-power sensors). | Select SMAJ17A-M3 only if system-level surge testing confirms <400 W requirement; not suitable for ISO 7637-2 Pulse 5a. |
| SMCJ17CA-M3 | Bidirectional version; identical VWM (17 V), VBR (18.9–20.9 V), VC (27.6 V), and PPPM (1500 W). | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus) where reverse polarity transients occur. | Choose SMCJ17CA-M3 only when bidirectional clamping is mandated; unidirectional SMCJ17A-M3 avoids unnecessary capacitance in DC rails. |
Compared with SMAJ17A-M3, SMCJ17A-M3/57T delivers 3.75× higher surge energy handling in the same mounting footprint class; versus SMCJ17CA-M3, it offers lower junction capacitance and avoids redundant reverse-path clamping in DC-only applications.
Availability
SMCJ17A-M3/57T is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power systems requiring stable component supply, halogen-free compliance, and high-reliability transient suppression.
Supply support for SMCJ17A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, consistency, and AEC-Q101 readiness are critical.
FAQ
What is the maximum clamping voltage of the SMCJ17A-M3/57T under rated surge conditions?
The SMCJ17A-M3/57T has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated 54.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that downstream components see no more than 27.6 V during worst-case transient events - a critical parameter for protecting 3.3 V or 5 V logic interfaces fed from a 12 V or 24 V rail. The SMCJ17A-M3/57T maintains this clamping performance across its full operating temperature range.
Does the SMCJ17A-M3/57T meet automotive qualification standards?
The SMCJ17A-M3/57T is a commercial-grade part with halogen-free RoHS compliance (M3 suffix) but is not AEC-Q101 qualified. However, Vishay offers the functionally identical SMCJ17A-HM3_X variant (e.g., SMCJ17A-HM3_A) which carries full AEC-Q101 qualification for automotive use. Engineers selecting SMCJ17A-M3/57T for automotive designs must validate system-level robustness independently, as the SMCJ17A-M3/57T itself does not carry the automotive qualification mark.
How does the SMCJ17A-M3/57T differ from the SMCJ17CA-M3 in practical circuit design?
The SMCJ17A-M3/57T is unidirectional and intended for DC line protection (e.g., +12 V rail to ground), while the SMCJ17CA-M3 is bidirectional and suited for AC or dual-polarity signals (e.g., RS-485 differential pairs). Their VWM, VBR, VC, and PPPM values are identical, but the SMCJ17A-M3/57T exhibits lower junction capacitance - reducing signal distortion in high-speed lines. Using SMCJ17A-M3/57T in place of SMCJ17CA-M3 on an AC line would fail to suppress negative-going transients, making correct polarity selection essential.
What is the thermal resistance and derating behavior of the SMCJ17A-M3/57T?
The SMCJ17A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. Its power dissipation derates linearly above 25 °C ambient: at 50 °C TA, PD drops to 6.5 W; at 100 °C TA, it falls to ~3.3 W. This derating curve (Fig. 2 in datasheet 88394) must be applied in thermally constrained enclosures. The SMCJ17A-M3/57T does not require a heatsink for typical surge duty cycles but relies on adequate PCB copper area for sustained power handling.
Can the SMCJ17A-M3/57T be used in parallel for higher surge current handling?
No - the SMCJ17A-M3/57T is not recommended for parallel connection due to manufacturing variations in VBR (18.9–20.9 V), which cause uneven current sharing and potential thermal runaway. For higher IPPM requirements, select a single higher-rated device (e.g., SMCJ22A-M3) or implement external current-balancing resistors - though the latter degrades clamping performance. The SMCJ17A-M3/57T is characterized and validated as a standalone device; parallel use voids performance guarantees and is unsupported by Vishay.
SMCJ17A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 54.3A
- 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)
SMCJ17A-M3/57T FAQ
1.How can I place an order for SMCJ17A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17A-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 SMCJ17A-M3/57T reliable?
The price and inventory of SMCJ17A-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 SMCJ17A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ17A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17A-M3/57T?
SMCJ17A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17A-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 SMCJ17A-M3/57T?
For technical support, including SMCJ17A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17A-M3/57T requirements.
6.How does Aetrix verify that SMCJ17A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ17A-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 SMCJ17A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ17A-M3/57T?
All SMCJ17A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17A-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 SMCJ17A-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ17A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17A-M3/57T Tags
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