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Vishay General Semiconductor - Diodes Division SM6T27CAHE3/52
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- Part No.:
- SM6T27CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27CAHE3/52.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,009
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Product details
Overview
SM6T27CAHE3/52 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 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 37.5 V maximum clamping voltage (VC) at 16.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect automotive sensor interfaces, industrial I/O lines, and USB/RS-485 data lines.
For engineers reviewing the SM6T27CAHE3/52 datasheet, SM6T27CAHE3/52 pinout, SM6T27CAHE3/52 application, or SM6T27CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low-inductance SMB package, and verified performance under 10/1000 μs surge conditions per IEC 61000-4-5.
Technical Context
The SM6T27CAHE3/52 implements a glass-passivated silicon junction optimized for fast response (<1 ps typical) to ESD and lightning-induced transients. Its bidirectional architecture enables symmetrical clamping without polarity sensitivity, supporting protection of AC-coupled or differential signal paths such as CAN FD and LIN bus lines.
Thermal design relies on RθJA = 100 °C/W and RθJL = 20 °C/W, with derating applied above TA = 25 °C per Figure 2. The device operates across –65 °C to +150 °C junction temperature and meets MSL Level 1 (260 °C reflow peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 23.1 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 μA |
| VC @ IPPM | 37.5 V at 16.0 A (10/1000 μs) - ensures downstream ICs see no more than 37.5 V during worst-case surge |
| PPPM | 600 W - sustains high-energy transients common in automotive load-dump and inductive switching |
| IFSM | Not applicable - bidirectional device has no forward surge rating; only unidirectional variants specify 100 A |
| TJ max. | +150 °C - supports under-hood automotive environments and industrial enclosures without derating |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated placement and IPC-7351B land pattern |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated, 0.220" × 0.130" body size, 0.060" lead pitch, and cathode/anode terminals symmetrically arranged for bidirectional operation (no polarity marking).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity - no fixed polarity assignment |
| Terminal 2 | Anode / Cathode (bidirectional) | Complementary terminal completing symmetrical clamping path; identical electrical role to Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and floating references without external polarity management |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensor interfaces, and infotainment power rails |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 2 Ω/12 Ω coupling networks without degradation |
| Low inductance layout | Sub-1 nH package inductance minimizes voltage overshoot during <100 ns ESD events (IEC 61000-4-2) |
| MSL Level 1 rating | Allows single-reflow assembly at 260 °C peak without moisture-induced popcorn failure |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative transients on sensor supply and signal lines to prevent latch-up or gate oxide damage in downstream ADCs or microcontrollers. Use Value: Maintains signal integrity below 37.5 V during 16 A surges, enabling reliable operation per ISO 7637-2 Pulse 5a requirements. |
Use Scenario: Shielding half-duplex RS-485 transceivers in factory automation PLCs from ground loop surges and EFT bursts. IC Role / Device Role / Timing Role: Placed across A/B differential pair and GND to clamp common-mode transients while preserving signal swing within ±1.5 V compliance window. Use Value: Prevents transceiver shutdown during 4 kV IEC 61000-4-4 EFT events, ensuring uninterrupted Modbus RTU communication. |
| USB 2.0 Data Line Protection | DC Power Rail Clamp |
Use Scenario: Safeguarding D+/D− lines of USB host controllers in automotive infotainment head units against hot-plug ESD. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp limits voltage excursion to ≤37.5 V during ±8 kV contact discharge (IEC 61000-4-2). Use Value: Adds <1 pF parasitic capacitance per line, avoiding signal integrity loss at 480 Mbps full-speed USB timing. |
Use Scenario: Suppressing inductive kickback on 24 V DC control rails powering solenoids and relays in building HVAC systems. IC Role / Device Role / Timing Role: Parallel-connected TVS shunts energy from L·di/dt spikes into ground, limiting rail overshoot to safe levels for connected logic. Use Value: Handles 600 W peak power without thermal runaway, eliminating need for series resistors or RC snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28CA | Same SMB package, VBR = 29.1–32.2 V, VC = 45.4 V @ 13.2 A, lower PPPM (400 W) | Limited to lower-energy transients; insufficient for ISO 7637-2 Pulse 5a compliance | Select when cost sensitivity outweighs peak surge margin and AEC-Q101 is not required |
| 1.5KE27CA | DO-201 package (axial leaded), VBR = 25.7–28.4 V, VC = 37.5 V @ 16.0 A, same PPPM (600 W) | Through-hole mounting only; incompatible with SMT production and high-density PCB layouts | Choose only for legacy through-hole designs or prototyping where rework tolerance is prioritized over board space |
Compared with SMAJ28CA and 1.5KE27CA, SM6T27CAHE3/52 delivers AEC-Q101 qualification, MSL Level 1 compatibility, and identical clamping performance in a compact SMB footprint - making it the optimal choice for new automotive and industrial SMT designs requiring production-grade reliability.
Availability
SM6T27CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and USB 2.0 data line protection requiring stable component supply across multi-year production cycles.
Supply support for SM6T27CAHE3/52 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 automotive-grade reliability and AEC-Q101 validation.
The SM6T Series targets high-reliability transient suppression in harsh environments, engineered specifically for automotive powertrain, ADAS, and industrial control systems where robustness against ESD, EFT, and surge is non-negotiable.
FAQ
What is the clamping voltage of SM6T27CAHE3/52 under standard test conditions?
The SM6T27CAHE3/52 exhibits a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform at 16.0 A peak pulse current. This value is measured per JEDEC standards and guarantees that protected circuitry remains below this threshold during surge events, directly supporting design margins for 3.3 V and 5 V logic interfaces.
Is SM6T27CAHE3/52 qualified for automotive applications?
Yes, SM6T27CAHE3/52 carries AEC-Q101 qualification, confirmed by Vishay's documentation and marked with the "HE3" suffix indicating RoHS-compliant and automotive-grade construction. It is approved for use in engine control units, body electronics, and ADAS sensor modules where extended temperature range and long-term reliability are mandatory.
Does SM6T27CAHE3/52 have polarity markings on the package?
No, SM6T27CAHE3/52 is a bidirectional TVS diode and carries no polarity marking on the SMB (DO-214AA) package. Both terminals are functionally identical - either can serve as anode or cathode depending on instantaneous transient polarity - eliminating orientation errors during automated placement.
What is the thermal resistance of SM6T27CAHE3/52 from junction to ambient?
The SM6T27CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. This value assumes standard PCB layout; actual thermal performance improves with larger copper areas or internal plane connections.
Can SM6T27CAHE3/52 be used in place of a unidirectional TVS like SM6T27A?
No - SM6T27CAHE3/52 is strictly bidirectional and cannot replace unidirectional variants like SM6T27A in circuits requiring forward conduction or DC biasing. Its symmetrical V-I curve lacks defined anode/cathode behavior, making it unsuitable for applications needing rectification or DC blocking functionality.
SM6T27CAHE3/52 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 16A
- 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)
SM6T27CAHE3/52 FAQ
1.How can I place an order for SM6T27CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27CAHE3/52 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 SM6T27CAHE3/52 reliable?
The price and inventory of SM6T27CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T27CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T27CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27CAHE3/52?
SM6T27CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27CAHE3/52 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 SM6T27CAHE3/52?
For technical support, including SM6T27CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27CAHE3/52 requirements.
6.How does Aetrix verify that SM6T27CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T27CAHE3/52 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 SM6T27CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T27CAHE3/52?
All SM6T27CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27CAHE3/52, 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 SM6T27CAHE3/52 part is unused and in its original packaging.
Return procedure for SM6T27CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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