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Vishay General Semiconductor - Diodes Division 1.5SMC20CA-M3/57T
- Part No.:
- 1.5SMC20CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20CA-M3/57T.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,480
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Product details
Overview
1.5SMC20CA-M3/57T 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 (10/1000 μs), 20 V standoff voltage (VWM), and clamping voltage of 27.7 V at 54.2 A peak pulse current. It protects sensitive ICs and MOSFETs against lightning-induced transients and inductive switching surges in automotive and industrial power rails.
For engineers reviewing the 1.5SMC20CA-M3/57T datasheet, 1.5SMC20CA-M3/57T pinout, 1.5SMC20CA-M3/57T application, or 1.5SMC20CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, 27.7 V max clamping at 54.2 A, -65 °C to +150 °C operating junction temperature, halogen-free RoHS compliance (M3 suffix), and SMC package thermal resistance (RθJA = 75 °C/W).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 22.8 V min / 25.2 V max under 1.0 mA test current, and reverse leakage ≤1.0 μA at 17.1 V standoff. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, critical for suppressing sub-microsecond transients.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and supports automated placement due to its low-profile SMC outline. It is not AEC-Q101 qualified - the HM3 suffix denotes AEC-Q101 variants, but 1.5SMC20CA-M3/57T uses the commercial-grade M3 suffix only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 22.8–25.2 V @ 1.0 mA - Voltage at which device transitions into avalanche conduction; ensures reliable triggering above system operating voltage. |
| VC (Clamping) | 27.7 V @ 54.2 A - Maximum voltage seen by protected circuit during 10/1000 μs transient; limits stress on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capacity under standardized 10/1000 μs waveform; determines survivability against high-energy surges. |
| TJ Range | -65 °C to +150 °C - Operating and storage junction temperature range; supports under-hood automotive and industrial ambient conditions. |
| 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. |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); UL 94 V-0 molding compound; JESD 201 Class 2 whisker resistance. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction - fully symmetrical conduction path. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; bidirectional operation requires no orientation during PCB placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or floating DC buses without polarity constraints - eliminates need for dual unidirectional devices. |
| 1500 W peak pulse power | Withstands high-energy transients (e.g., ISO 7637-2 Pulse 5a) on 12 V/24 V automotive power nets without degradation. |
| Glass-passivated junction | Ensures stable avalanche characteristics over lifetime and temperature; reduces parameter drift vs. epoxy-passivated alternatives. |
| MSL Level 1 rating | Supports standard lead-free reflow profiles up to 260 °C peak without moisture-related popcorning or delamination. |
| Low-profile SMC package | Reduces board space vs. larger DO-214AA (SMB) or axial packages while maintaining thermal performance via optimized pad layout. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Bidirectional TVS placed at power entry point to clamp positive and negative spikes before they reach LDOs and microcontrollers. Use Value: Clamps to 27.7 V at 54.2 A, limiting voltage stress on 33 V-rated input capacitors and enabling robust front-end design without derating penalties. |
Use Scenario: Shielding 4–20 mA current-loop sensor transmitters from ESD and field wiring surges in factory automation. IC Role / Device Role / Timing Role: Placed across loop terminals to shunt fast transients while maintaining <1.0 μA leakage at 20 V operating voltage. Use Value: Sub-μA leakage preserves loop accuracy; 27.7 V clamping prevents op-amp saturation and ADC overrange in analog signal chains. |
| Telecom Line Card Surge Protection | Consumer USB Port ESD Suppression |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against lightning-induced common-mode surges on twisted-pair cables. IC Role / Device Role / Timing Role: Used in pair-wise configuration across differential pairs to suppress mode conversion transients without distorting signal integrity. Use Value: Symmetrical 27.7 V clamping ensures balanced suppression on both conductors, minimizing skew and preserving 100BASE-TX timing margins. |
Use Scenario: Adding secondary-level surge immunity to USB 2.0 VBUS lines in portable chargers and docking stations. IC Role / Device Role / Timing Role: Positioned upstream of USB switch ICs to absorb IEC 61000-4-5 Level 3 (1 kV/42 Ω) surges before they damage port controllers. Use Value: 1500 W rating exceeds IEC 61000-4-5 requirements; SMC footprint allows placement near connector with minimal trace inductance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA | Same VWM (20 V), lower PPPM (600 W), SMB (DO-214AA) package - 30% smaller footprint but higher RθJA (90 °C/W). | Preferred where board space is constrained and surge energy is limited to <600 W (e.g., low-power IoT nodes). | Select SMBJ20CA only if system-level testing confirms 600 W suffices; verify thermal performance on reduced copper area. |
| 1.5KE20CA | Same VWM (20 V), same PPPM (1500 W), but through-hole DO-15 package - incompatible with SMT assembly and lacks MSL Level 1 rating. | Suitable for legacy through-hole designs or prototyping where reflow compatibility is not required. | Choose 1.5KE20CA only for hand-soldered or wave-soldered boards; avoid in automated production targeting RoHS/halogen-free compliance. |
Compared with SMBJ20CA and 1.5KE20CA, the 1.5SMC20CA-M3/57T delivers identical clamping performance in a surface-mount package qualified for modern reflow processes, with superior thermal management (RθJA = 75 °C/W) and halogen-free compliance - making it optimal for volume automotive and industrial SMT production.
Availability
1.5SMC20CA-M3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom line card surge suppression, and consumer USB port ESD mitigation requiring stable component supply and full halogen-free compliance.
Supply support for 1.5SMC20CA-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, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was designed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, repeatability, and long-term stability under thermal cycling are critical.
FAQ
What is the maximum clamping voltage of the 1.5SMC20CA-M3/57T under standard test conditions?
The 1.5SMC20CA-M3/57T has a maximum clamping voltage (VC) of 27.7 V when subjected to its rated peak pulse current of 54.2 A using the 10/1000 μs waveform. This value is measured per JEDEC standards and reflects worst-case voltage seen by protected circuitry during surge events - critical for validating downstream component voltage ratings.
Is the 1.5SMC20CA-M3/57T AEC-Q101 qualified?
No, the 1.5SMC20CA-M3/57T is not AEC-Q101 qualified. It carries the M3 suffix, indicating halogen-free and RoHS-compliant commercial-grade construction. AEC-Q101 variants use the HM3 suffix (e.g., 1.5SMC20CAHM3_A/H) and require explicit ordering with the HM3 designation and revision code.
What does the "CA" suffix indicate in 1.5SMC20CA-M3/57T?
The "CA" suffix in 1.5SMC20CA-M3/57T denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike "A"-suffixed unidirectional parts, CA devices have no cathode marking and function identically regardless of terminal orientation.
What is the thermal resistance from junction to ambient for the 1.5SMC20CA-M3/57T?
The 1.5SMC20CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB construction and is essential for calculating steady-state temperature rise under continuous power dissipation.
Can the 1.5SMC20CA-M3/57T replace a unidirectional TVS like 1.5SMC20A-M3/57T in the same PCB layout?
No - the 1.5SMC20CA-M3/57T cannot directly replace a unidirectional 1.5SMC20A-M3/57T without layout review. While both share the same SMC package and pinout, the unidirectional part requires correct cathode orientation (marked band), whereas the CA version is polarity-agnostic. Layout must ensure no unintended grounding or biasing conflicts arise from symmetrical terminal behavior.
1.5SMC20CA-M3/57T 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- 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)
1.5SMC20CA-M3/57T FAQ
1.How can I place an order for 1.5SMC20CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20CA-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 1.5SMC20CA-M3/57T reliable?
The price and inventory of 1.5SMC20CA-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 1.5SMC20CA-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC20CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20CA-M3/57T?
1.5SMC20CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20CA-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 1.5SMC20CA-M3/57T?
For technical support, including 1.5SMC20CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC20CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20CA-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 1.5SMC20CA-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC20CA-M3/57T?
All 1.5SMC20CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20CA-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 1.5SMC20CA-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC20CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20CA-M3/57T Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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