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Vishay General Semiconductor - Diodes Division SM6T15CA-M3/52
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- Part No.:
- SM6T15CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15CA-M3/52.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,149
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Product details
Overview
SM6T15CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 15 V standoff voltage (VWM), 21.2 V max clamping voltage at 28 A peak pulse current (10/1000 μs), and 600 W peak pulse power capability - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the SM6T15CA-M3/52 datasheet, SM6T15CA-M3/52 pinout, SM6T15CA-M3/52 application, or SM6T15CA-M3/52 equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.41), 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 (VBR min/max = 14.3 V / 15.8 V at 1 mA) and clamping behavior. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and robust ESD immunity up to ±30 kV (contact).
Thermal design relies on low RθJA (100 °C/W) and RθJL (20 °C/W), enabling operation up to +150 °C junction temperature. The device meets MSL Level 1 (260 °C reflow peak) and supports automated SMT placement without derating concerns under standard pad layout (0.2" × 0.2" copper).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - maximum reverse standoff voltage before conduction begins; defines operating margin below clamping threshold |
| VBR (min/max) | 14.3 V / 15.8 V at 1 mA - symmetric breakdown in both directions; ensures predictable turn-on during positive/negative transients |
| VC @ IPPM | 21.2 V at 28 A (10/1000 μs) - clamping voltage limits downstream IC stress during surge events |
| PPPM | 600 W - peak pulse power handling per single transient; validated per IEC 61000-4-5 waveform |
| ID @ VWM | <1 μA - ultra-low leakage preserves signal integrity in high-impedance sensor or data lines |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.2 mm height; compatible with IPC-7351B footprint |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges; symmetrical with cathode under reverse bias |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges; electrically identical to anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC characteristics in both directions - eliminates need for polarity-aware layout or orientation control |
| 600 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation when mounted per recommended pad layout |
| Halogen-free & RoHS-compliant (M3) | Meets JEDEC J-STD-20D MSL Level 1 and JESD201 Class 2 whisker resistance - suitable for lead-free reflow and long-term reliability |
| Low clamping ratio (VC/VWM) | 1.66 - tight voltage limiting enables use with 3.3 V or 5 V logic rails without overvoltage risk to protected ICs |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching MCU or signal conditioner. Use Value: Prevents latch-up or permanent damage to automotive-grade microcontrollers by limiting induced voltages to ≤21.2 V during 28 A transients. | Use Scenario: Safeguarding digital input modules against field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Fast-response TVS placed between terminal block and optocoupler input stage to absorb repetitive switching spikes. Use Value: Enables >100,000 surge cycles without parameter shift due to glass-passivated junction stability and low thermal resistance. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Shielding Ethernet PHY or DSL line drivers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: Primary-level TVS in series with gas discharge tube (GDT) for staged protection architecture. Use Value: Low clamping voltage ensures PHY ICs remain within absolute maximum ratings even during 10/1000 μs 4 kV surges. | Use Scenario: Adding secondary-level surge immunity to USB 2.0 data lines (D+/D−) in portable devices. IC Role / Device Role / Timing Role: Bidirectional clamp bridging differential pair to ground, preserving signal integrity while suppressing ESD. Use Value: Sub-1 μA leakage avoids DC loading of high-speed data lines; 21.2 V VC prevents overshoot beyond USB PHY tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | Same VWM (12.8 V) and VC (21.2 V), but lower PPPM (400 W); SMA package (larger footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 without parallel staging | Select SMAJ15CA only if board space allows larger SMA and surge energy is ≤400 W |
| 1.5KE15CA | Higher PPPM (1500 W), axial-leaded TO-204AE package; not SMT-compatible; higher parasitic inductance | Requires through-hole assembly; incompatible with automated SMT lines; less effective for fast-rising ESD | Choose 1.5KE15CA only for legacy through-hole designs where PCB rework is acceptable |
Compared with SMAJ15CA and 1.5KE15CA, SM6T15CA-M3/52 delivers optimal balance of 600 W surge capacity, SMB footprint compatibility, and bidirectional symmetry - making it the preferred choice for new SMT-based automotive and industrial designs requiring AEC-Q101-ready variants.
Availability
SM6T15CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply and halogen-free compliance.
Supply support for SM6T15CA-M3/52 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 and automotive-grade qualification.
The SM6T Series is engineered specifically for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where bidirectional clamping, low leakage, and AEC-Q101 readiness are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T15CA-M3/52?
The "CA" suffix denotes a bidirectional configuration: SM6T15CA-M3/52 provides symmetrical clamping for both positive and negative voltage transients, unlike unidirectional variants (e.g., SM6T15A). This eliminates polarity marking requirements and simplifies layout for AC-coupled or differential signal lines. The device's VBR and VC values are identical in either direction, confirmed in Vishay's Electrical Characteristics table on page 2 of document 88385.
Is SM6T15CA-M3/52 qualified to AEC-Q101?
SM6T15CA-M3/52 itself is commercial-grade (M3 suffix), but Vishay offers AEC-Q101-qualified versions under HM3 suffix (e.g., SM6T15CAHM3_B/I). The M3 variant shares identical electrical specs and construction - including glass-passivated junction and MSL Level 1 rating - and serves as the baseline for automotive qualification. Full AEC-Q101 testing applies only to HM3-labeled units per ordering information on page 2.
What is the maximum clamping voltage of SM6T15CA-M3/52 under a 10/1000 μs surge?
The maximum clamping voltage (VC) of SM6T15CA-M3/52 is 21.2 V when subjected to a 10/1000 μs waveform at 28 A peak pulse current (IPPM), as specified in the Electrical Characteristics table (page 2, document 88385). This value is measured with the device mounted on 0.2" × 0.2" copper pads - critical for achieving rated performance; reduced pad area increases VC.
How does the M3 suffix differ from E3 in SM6T15CA-M3/52?
The M3 suffix indicates halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance, whereas E3 denotes standard RoHS compliance without halogen-free assurance. Both meet MSL Level 1 and share identical electrical parameters. SM6T15CA-M3/52 is optimized for environmentally sensitive applications (e.g., automotive interiors, consumer white goods) where halogen content restrictions apply per IEC 61249-2-21.
Can SM6T15CA-M3/52 be used in place of a unidirectional TVS like SM6T15A?
No - SM6T15CA-M3/52 is strictly bidirectional and lacks polarity marking; substituting it for unidirectional SM6T15A would compromise forward-bias protection on DC power rails. Unidirectional types conduct only during reverse surges and block forward current, while SM6T15CA-M3/52 conducts during both polarities. Use SM6T15CA-M3/52 only where symmetrical clamping is required, such as AC signal lines or differential buses.
SM6T15CA-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, 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):
- 28A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SM6T15CA-M3/52 FAQ
1.How can I place an order for SM6T15CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15CA-M3/52 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 SM6T15CA-M3/52 reliable?
The price and inventory of SM6T15CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SM6T15CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15CA-M3/52?
SM6T15CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15CA-M3/52 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 SM6T15CA-M3/52?
For technical support, including SM6T15CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15CA-M3/52 requirements.
6.How does Aetrix verify that SM6T15CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T15CA-M3/52 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 SM6T15CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SM6T15CA-M3/52?
All SM6T15CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15CA-M3/52, 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 SM6T15CA-M3/52 part is unused and in its original packaging.
Return procedure for SM6T15CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15CA-M3/52 Tags
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