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Vishay General Semiconductor - Diodes Division SM6T27CA-E3/52
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- Part No.:
- SM6T27CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27CA-E3/52.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,407
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Product details
Overview
SM6T27CA-E3/52 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 standoff voltage (VWM), 30.6 V minimum breakdown voltage (VBR), 37.5 V maximum clamping voltage (VC) at 16.0 A IPPM, and 600 W peak pulse power capability with 10/1000 μs waveform - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SM6T27CA-E3/52 datasheet, SM6T27CA-E3/52 pinout, SM6T27CA-E3/52 application, or SM6T27CA-E3/52 equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.23), AEC-Q101 qualification eligibility, SMB thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The SM6T27CA-E3/52 operates as a symmetric bidirectional TVS, with identical electrical characteristics in both polarities due to its center-tapped junction structure. Its clamping action begins at ~30.6 V (VBR min) and limits transient voltage to ≤37.5 V at 16.0 A peak pulse current under standardized 10/1000 μs waveform conditions.
It uses a glass-passivated silicon junction housed in an SMB package rated for 150 °C maximum junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation in high-density PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC bias margin for protected line |
| VBR (min) | 30.6 V - guaranteed breakdown onset at 1.0 mA test current; ensures predictable clamping initiation |
| VC @ IPPM | 37.5 V at 16.0 A - clamped voltage during 10/1000 μs surge; determines worst-case overvoltage seen by downstream IC |
| PPPM | 600 W - peak pulse power handling per 10/1000 μs waveform; supports robust ESD and lightning-induced surge immunity |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient |
| Package | SMB (DO-214AA) - surface-mount outline with 2.20 mm max height and 3.94 mm body length; compatible with J-STD-020 MSL Level 1 reflow |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetric) | Bidirectional transient conduction path | No functional distinction between terminals; either terminal serves as cathode or anode depending on transient polarity |
| Case / Body | Non-electrical mechanical interface | Provides mechanical anchoring and thermal path to PCB copper; not electrically connected |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 24 V industrial buses without external series impedance |
| Low clamping ratio (VC/VBR ≈ 1.23) | Minimizes overvoltage stress on protected MOSFET gates or MCU I/O pins during fast transients |
| Glass passivated junction | Ensures stable leakage performance (<1.0 μA at VWM) across temperature and humidity, critical for long-term reliability in automotive cabins |
| MSL Level 1 (260 °C peak) | Supports single-reflow assembly without moisture sensitivity concerns, eliminating bake requirements in high-volume SMT lines |
| AEC-Q101 qualification option | Base P/NHE3 suffix enables automotive-grade sourcing; SM6T27CA-E3/52 itself is commercial grade but shares identical die and construction |
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 inductive switching transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Limits transient voltage to ≤37.5 V, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V MCUs and analog front-ends. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against 24 V DC supply line surges caused by relay coil de-energization or field wiring faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each isolated input channel, mounted adjacent to optocoupler input diodes. Use Value: Withstands repetitive 600 W pulses without degradation, maintaining consistent clamping performance over >100,000 surge events in factory automation environments. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceiver data lines in base station remote units from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) placed before ESD protection diodes to handle higher-energy threats. Use Value: Low 20 °C/W junction-to-lead thermal resistance allows rapid heat dissipation into PCB traces, sustaining clamping during multi-pulse surge sequences. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to microcontroller-based motor drivers. IC Role / Device Role / Timing Role: Snubber device across motor terminals or H-bridge outputs to clamp inductive kickback below MOSFET avalanche rating. Use Value: 150 °C max junction temperature rating permits operation in sealed, thermally constrained appliance enclosures without thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28CA | 400 W PPPM (vs. 600 W); same VWM (23.1 V), slightly higher VC (38.9 V at 12.9 A) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); less margin for 24 V bus overshoot scenarios | Select when board space constraints favor SMA package (smaller footprint) and surge threat level is confirmed ≤400 W |
| SMCJ28CA | 1500 W PPPM (vs. 600 W); same VWM (23.1 V), lower clamping ratio (VC = 42.6 V at 35.3 A) | Overqualified for most 24 V interfaces; requires larger SMB-compatible SMC package (7.11 mm x 6.22 mm) | Choose for mission-critical 24 V power rail protection where multi-kW surge immunity is mandated, accepting larger footprint and cost premium |
Compared with SMAJ28CA and SMCJ28CA, the SM6T27CA-E3/52 delivers optimal balance of surge robustness (600 W), compact SMB footprint, and low clamping voltage - making it ideal for space-constrained 24 V signal line protection where Level 3 surge compliance is required but SMC-level ruggedness is unnecessary.
Availability
SM6T27CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply and RoHS-compliant commercial-grade TVS diodes.
Supply support for SM6T27CA-E3/52 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, thermal performance, and automotive qualification.
The SM6T Series was developed to deliver high-power transient suppression in low-profile surface-mount packages for automotive, industrial, and telecom applications where board space and surge immunity must coexist.
FAQ
What is the polarity configuration of SM6T27CA-E3/52?
The SM6T27CA-E3/52 is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., SM6T27A), it has no cathode marking and functions identically regardless of voltage polarity applied across its terminals - essential for protecting AC-coupled or differential signal lines like RS-485 or CAN bus.
Does SM6T27CA-E3/52 meet AEC-Q101 qualification?
The SM6T27CA-E3/52 itself is a commercial-grade part (E3 suffix). However, Vishay offers AEC-Q101 qualified versions under ordering codes SM6T27CAHE3_X (RoHS-compliant, automotive grade) and SM6T27CAHM3_X (halogen-free, automotive grade), which share identical electrical and thermal specifications but undergo additional stress testing per AEC-Q101 standards.
What is the maximum clamping voltage of SM6T27CA-E3/52 under surge conditions?
The SM6T27CA-E3/52 has a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 16.0 A. This value is guaranteed per Vishay's datasheet (Document Number 88385, Rev. 09-Jan-2024) and represents the upper limit of voltage seen by protected circuitry during standardized surge events.
Can SM6T27CA-E3/52 be used in place of SM6T27A in a design?
No - SM6T27CA-E3/52 is bidirectional while SM6T27A is unidirectional. Substituting them requires verifying circuit topology: SM6T27A includes a cathode band and conducts only in reverse bias, whereas SM6T27CA-E3/52 clamps symmetrically. Using SM6T27CA-E3/52 in a unidirectional application may cause unintended conduction during normal forward bias operation.
What PCB pad layout is recommended for optimal thermal performance of SM6T27CA-E3/52?
Vishay specifies mounting SM6T27CA-E3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated thermal resistance (RθJA = 100 °C/W) and 600 W pulse power capability. Pad dimensions must follow the SMB (DO-214AA) outline: minimum 0.086" (2.18 mm) width and 0.060" (1.52 mm) length, with 0.220" (5.59 mm) overall reference length.
SM6T27CA-E3/52 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T27CA-E3/52 FAQ
1.How can I place an order for SM6T27CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27CA-E3/52 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 SM6T27CA-E3/52 reliable?
The price and inventory of SM6T27CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T27CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SM6T27CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27CA-E3/52?
SM6T27CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27CA-E3/52 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 SM6T27CA-E3/52?
For technical support, including SM6T27CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27CA-E3/52 requirements.
6.How does Aetrix verify that SM6T27CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T27CA-E3/52 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 SM6T27CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SM6T27CA-E3/52?
All SM6T27CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27CA-E3/52, 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 SM6T27CA-E3/52 part is unused and in its original packaging.
Return procedure for SM6T27CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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