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Vishay General Semiconductor - Diodes Division SM6T15CAHE3/52
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- Part No.:
- SM6T15CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15CAHE3/52.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,068
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Product details
Overview
SM6T15CAHE3/52 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 maximum clamping voltage (VC) at 28 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform. It is AEC-Q101 qualified and RoHS-compliant, used for protecting automotive sensor interfaces and industrial I/O lines.
For engineers reviewing the SM6T15CAHE3/52 datasheet, SM6T15CAHE3/52 pinout, SM6T15CAHE3/52 application, or SM6T15CAHE3/52 equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VBR ≈ 1.37), MSL Level 1 moisture sensitivity, 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The SM6T15CAHE3/52 operates as a symmetrical avalanche diode, conducting in both directions when reverse voltage exceeds its breakdown threshold of 14.3–15.8 V (at 1 mA). Its glass-passivated junction ensures stable leakage (<1 μA at 12.8 V) and robust surge handling under repetitive transients.
Designed for unclamped inductive switching events and lightning-induced surges, it delivers consistent clamping performance across -65 °C to +150 °C operating range, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation without external heatsinking in typical PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working margin below clamping onset. |
| VBR min/max | 14.3 V / 15.8 V at 1 mA - Confirmed breakdown range ensures predictable turn-on timing during overvoltage events. |
| VC @ IPPM | 21.2 V at 28 A (10/1000 μs) - Clamping voltage limits downstream IC stress; enables protection of 15 V rail systems with ~40% headroom. |
| PPPM | 600 W - Peak pulse power rating determines survivability against standardized surge waveforms per IEC 61000-4-5. |
| TJ max | +150 °C - Maximum junction temperature supports operation in under-hood automotive environments and sealed industrial enclosures. |
| MSL Level | Level 1 per J-STD-020 - No floor life limitation or bake requirement prior to reflow; compatible with standard SMT assembly processes. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band absent per bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts during positive-going surges; connects to protected line or node requiring bidirectional clamping. |
| Cathode | Transient current entry (negative half-cycle) | Conducts during negative-going surges; electrically symmetric to anode in bidirectional configuration. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against high-energy transients such as ISO 7637-2 Pulse 1/2a/5a in automotive ECUs without derating. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-required for engine control, ADAS, and body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to downstream 16 V-tolerant interface ICs. |
| MSL Level 1, 260 °C reflow compatible | Eliminates pre-bake requirements and simplifies manufacturing flow for high-volume automotive and industrial SMT lines. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive kickback in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector or IC input pins to shunt surge energy before it reaches sensitive analog front-ends. Use Value: Maintains signal integrity by limiting transient voltage to ≤21.2 V, preventing damage to 15 V-rated transceivers while meeting ISO 16750-2 test requirements. | Use Scenario: Safeguarding PLC digital input modules and fieldbus interfaces (RS-485, Profibus) against ESD and surge events in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on field-side signal lines, coordinated with series impedance and filtering components. Use Value: Withstands repeated 600 W surges without degradation, supporting long-term reliability in harsh electromagnetic environments per IEC 61000-4-4/5. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side transient suppression on DC output rails of AC/DC adapters and USB PD chargers exposed to system-level coupling noise. IC Role / Device Role / Timing Role: Fast-response clamping device placed after bulk capacitor to protect downstream DC-DC controllers and load switches. Use Value: Low leakage (<1 μA at 12.8 V) prevents standby power loss; compact SMB footprint saves board space in cost-sensitive consumer designs. | Use Scenario: Protecting Ethernet PHYs and DSL line drivers from lightning-induced surges entering via RJ-45 jacks in residential gateways and base stations. IC Role / Device Role / Timing Role: First-stage TVS in multi-tier protection scheme, absorbing bulk surge energy before GDT or MOV stages. Use Value: Symmetrical clamping ensures equal protection for differential pairs; 21.2 V clamping aligns with IEEE 802.3af PoE voltage margins. |
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 | Same VWM (12.8 V), lower PPPM (400 W), SMA package (smaller thermal mass) | Limited to lower-energy transients; not AEC-Q101 qualified | Select for cost-sensitive consumer applications where 400 W surge rating suffices and automotive qualification is unnecessary. |
| 1.5KE15CA | Higher PPPM (1500 W), DO-204AC (Axial) through-hole package, higher VC (24.4 V) | Requires manual or wave soldering; less suitable for high-density SMT layouts | Choose when legacy board design mandates axial components or when higher single-pulse energy absorption is required beyond 600 W. |
Compared with SMAJ15CA and 1.5KE15CA, the SM6T15CAHE3/52 provides optimal balance of automotive-grade reliability, SMT manufacturability, and 600 W surge capacity in a compact SMB outline-making it preferred for new automotive and industrial designs requiring AEC-Q101 compliance and automated assembly.
Availability
SM6T15CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, consumer power adapter outputs, and telecom line interfaces requiring stable component supply, AEC-Q101 qualification, and RoHS-compliant sourcing.
Supply support for SM6T15CAHE3/52 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, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems-designed to meet stringent AEC-Q101, IEC 61000-4-x, and ISO 7637 standards with validated surge endurance and thermal stability.
FAQ
What is the breakdown voltage range of the SM6T15CAHE3/52?
The SM6T15CAHE3/52 has a guaranteed breakdown voltage (VBR) range of 14.3 V to 15.8 V at 1 mA test current, measured per JEDEC standards. This tight tolerance ensures consistent clamping onset across production lots and supports precise overvoltage protection design for 15 V nominal systems. The value is confirmed in Vishay's official datasheet revision 09-Jan-2024, Document Number 88385.
Is the SM6T15CAHE3/52 suitable for automotive applications?
Yes, the SM6T15CAHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3". It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and ESD-to ensure reliability in engine control units, body electronics, and ADAS sensors. Its MSL Level 1 rating and 150 °C max junction temperature further validate suitability for under-hood environments.
What does the "CA" suffix indicate in SM6T15CAHE3/52?
The "CA" suffix in SM6T15CAHE3/52 denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both polarities. Unlike unidirectional variants (e.g., SM6T15A), it has no cathode marking and conducts equally for positive and negative voltage excursions-ideal for protecting AC-coupled lines, differential buses like CAN, and floating sensor references.
What is the maximum clamping voltage of the SM6T15CAHE3/52 under surge conditions?
The SM6T15CAHE3/52 exhibits a maximum clamping voltage (VC) of 21.2 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 28 A. This value is measured under standardized test conditions (mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during worst-case transients.
How does the SMB (DO-214AA) package of the SM6T15CAHE3/52 compare to SMA in size and thermal performance?
The SMB package of the SM6T15CAHE3/52 measures 4.57 mm × 3.94 mm × 2.20 mm-larger than SMA (DO-214AC) by ~15% in footprint and ~20% in thermal pad area. Its RθJA is 100 °C/W (vs. ~125 °C/W for SMA), delivering superior heat dissipation. This makes SM6T15CAHE3/52 more robust for repeated surge events in confined PCB layouts where thermal management is critical.
SM6T15CAHE3/52 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T15CAHE3/52 FAQ
1.How can I place an order for SM6T15CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15CAHE3/52 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 SM6T15CAHE3/52 reliable?
The price and inventory of SM6T15CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T15CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15CAHE3/52?
SM6T15CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15CAHE3/52 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 SM6T15CAHE3/52?
For technical support, including SM6T15CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15CAHE3/52 requirements.
6.How does Aetrix verify that SM6T15CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T15CAHE3/52 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 SM6T15CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T15CAHE3/52?
All SM6T15CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15CAHE3/52, 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 SM6T15CAHE3/52 part is unused and in its original packaging.
Return procedure for SM6T15CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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