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Vishay General Semiconductor - Diodes Division SM15T15CA-M3/57T
- Part No.:
- SM15T15CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15CA-M3/57T.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,473
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Product details
Overview
SM15T15CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 15 V standoff voltage (VWM), and clamping voltage of 21.2 V at 71 A peak pulse current. It protects signal lines and power rails in automotive sensor interfaces and industrial I/O modules against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T15CA-M3/57T datasheet, SM15T15CA-M3/57T pinout, SM15T15CA-M3/57T application, or SM15T15CA-M3/57T equivalent, key selection criteria include bidirectional clamping behavior, 15 V VWM, 21.2 V VC at 71 A, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical breakdown (14.3–15.8 V), clamping (21.2 V), and leakage (<1.0 μA at 15 V) characteristics in forward and reverse directions. Its low-inductance SMC package and glass-passivated junction enable fast response to sub-microsecond transients while maintaining stable clamping under repeated 10/1000 μs surges.
The device is designed for high-impedance source environments where system-level source impedance limits peak current within its 71 A IPPM rating. Failure mode under overstress is short-circuit, consistent with automotive-grade protection requirements and compatible with downstream fuse coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit's normal operating range. |
| VBR (min/max) | 14.3 V / 15.8 V - Breakdown occurs within this band at 1 mA test current; ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 21.2 V at 71 A - Clamped voltage during 10/1000 μs surge; defines worst-case overvoltage seen by downstream ICs or MOSFETs. |
| PPPM | 1500 W - Peak pulse power handling capability; supports protection against lightning-induced surges per IEC 61000-4-5 Level 3/4. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial ambient environments. |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height; optimized for automated placement and thermal dissipation on 8 mm × 8 mm copper pads. |
Pinout & Package
SM15T15CA-M3/57T uses the standard SMC (DO-214AB) bidirectional package with no polarity marking. Both terminals are electrically symmetrical; neither is designated anode or cathode. The device mounts with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient input/output node | Connected to protected line (e.g., CAN_H or sensor supply); conducts surge current bidirectionally to ground reference. |
| Terminal 2 | Transient input/output node | Connected to same protected line or ground return path; completes symmetrical clamping loop with Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions-enables single-device protection of AC-coupled or differential signal lines like RS-485 or CAN. |
| 1500 W peak pulse power | Withstands 10/1000 μs transients up to 71 A-meets IEC 61000-4-5 surge immunity requirements for industrial and automotive front-end protection. |
| Halogen-free & RoHS-compliant (M3) | Complies with JEDEC JESD201 Class 2 whisker resistance and EU RoHS Directive 2011/65/EU-supports green manufacturing and export compliance. |
| Low clamping ratio (VC/VWM = 1.41) | Minimizes overvoltage stress on protected ICs-critical for safeguarding 3.3 V or 5 V logic interfaces adjacent to high-energy transients. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load-dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and ECU input, shunting transients to chassis ground. Use Value: Limits transient overvoltage to ≤21.2 V, preventing latch-up or gate oxide damage in downstream op-amps and ADC drivers operating at 5 V. |
Use Scenario: Safeguarding RS-485 transceiver bus lines (A/B) in factory automation PLCs subjected to EFT and surge events on long cable runs. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS pair mounted at connector entry point to absorb common-mode and differential-mode surges. Use Value: Maintains signal integrity by clamping fast-rising edges (<1 ns) without adding capacitance that degrades 10 Mbps data rates. |
| Telecom Power Input Stage | Consumer USB-C Port Protection |
|
Use Scenario: Secondary-side transient suppression on 12 V DC input rails of VoIP phones and base stations connected to PoE-powered infrastructure. IC Role / Device Role / Timing Role: Standoff-rated TVS parallel to bulk capacitor, conducting lightning-induced surges before upstream fuses open. Use Value: Withstands 1500 W pulses without degradation, enabling single-stage protection architecture and reducing BOM count vs. multi-stage designs. |
Use Scenario: Overvoltage protection on VBUS and CC lines of USB-C receptacles in portable monitors and docking stations. IC Role / Device Role / Timing Role: Bidirectional clamp between VBUS and ground, triggered by hot-plug induced transients or faulty chargers. Use Value: Halogen-free M3 construction meets IEC 62368-1 flammability and environmental requirements for consumer end-products. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | Lower peak power (400 W), smaller SMA package (DO-214AC), higher VC (24.4 V at 24.7 A) | Limited to lower-energy threats (IEC 61000-4-4 EFT only); unsuitable for lightning-level surges requiring 1500 W rating. | Select SMAJ15CA only when board space is constrained and threat level is limited to fast transients-not for automotive or industrial mains-connected systems. |
| SMCJ15CA | Same SMC package, identical 15 V VWM, but higher PPPM (1500 W) and lower VC (21.2 V at 71 A)-functionally identical clamping performance. | No functional difference in protection capability; differs only in product family branding and minor process variations. | SMCJ15CA is a direct functional alternative with identical electrical specs and package; verify M3 halogen-free status matches SM15T15CA-M3/57T if required for compliance. |
Compared with SMAJ15CA and SMCJ15CA, SM15T15CA-M3/57T delivers identical 15 V bidirectional clamping and 1500 W surge capacity in an M3-compliant SMC package, but offers superior thermal resistance (RθJL = 15 °C/W) for sustained surge duty cycles in high-ambient environments.
Availability
SM15T15CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom power input stages requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification pathway.
Supply support for SM15T15CA-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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series was developed for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where 1500 W surge immunity and bidirectional symmetry are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T15CA-M3/57T?
The "CA" suffix denotes a bidirectional configuration: SM15T15CA-M3/57T provides symmetrical clamping in both polarities, unlike unidirectional variants ending in "A". This allows use on AC-coupled lines or differential buses without polarity concerns, and eliminates the need for separate anode/cathode routing on PCBs. The device has no marking band, confirming its bidirectional nature.
Is SM15T15CA-M3/57T qualified to AEC-Q101?
SM15T15CA-M3/57T itself is commercial-grade with halogen-free RoHS compliance (M3 suffix). However, the SM15T family offers AEC-Q101-qualified versions under HM3 suffixes (e.g., SM15T15CAHM3_A/H). For automotive applications requiring qualification, specify the HM3 variant-SM15T15CA-M3/57T is not AEC-Q101 certified but shares identical electrical and thermal design.
What is the maximum clamping voltage of SM15T15CA-M3/57T under surge conditions?
The maximum clamping voltage (VC) of SM15T15CA-M3/57T is 21.2 V when subjected to a 10/1000 μs waveform at its peak pulse current of 71 A. This value is guaranteed across temperature and lifetime, and defines the upper voltage limit imposed on protected circuits during surge events-critical for ensuring compatibility with 3.3 V or 5 V interface ICs.
How does the M3 suffix affect the environmental compliance of SM15T15CA-M3/57T?
The M3 suffix indicates SM15T15CA-M3/57T is halogen-free and RoHS-compliant per EU Directive 2011/65/EU, with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. It also satisfies UL 94 V-0 flammability for the molding compound. These attributes make SM15T15CA-M3/57T suitable for consumer, industrial, and export-sensitive markets requiring strict material declarations.
Can SM15T15CA-M3/57T be used in place of unidirectional TVS diodes like SM15T15A-M3/57T?
No-SM15T15CA-M3/57T is strictly bidirectional and cannot replace unidirectional types such as SM15T15A-M3/57T in circuits requiring polarity-specific conduction (e.g., DC power rail clamping with defined anode/cathode orientation). Substitution would result in unintended conduction paths and potential malfunction. Always match device polarity (A vs. CA) to the circuit's voltage reference and grounding scheme.
SM15T15CA-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 71A
- 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)
SM15T15CA-M3/57T FAQ
1.How can I place an order for SM15T15CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15CA-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 SM15T15CA-M3/57T reliable?
The price and inventory of SM15T15CA-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 SM15T15CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T15CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15CA-M3/57T?
SM15T15CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15CA-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 SM15T15CA-M3/57T?
For technical support, including SM15T15CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15CA-M3/57T requirements.
6.How does Aetrix verify that SM15T15CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T15CA-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 SM15T15CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T15CA-M3/57T?
All SM15T15CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15CA-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 SM15T15CA-M3/57T part is unused and in its original packaging.
Return procedure for SM15T15CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15CA-M3/57T Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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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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