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Vishay General Semiconductor - Diodes Division SM6T27CAHE3_B/I
- Part No.:
- SM6T27CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27CAHE3_B/I.pdf
- Description:
- 600W,27V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,518
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Product details
Overview
SM6T27CAHE3_B/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 27 V breakdown voltage (VBR = 25.7–28.4 V at IT = 1.0 mA), and 37.5 V maximum clamping voltage (VC) at IPPM. It protects signal lines and power rails in automotive sensor units against ESD and inductive switching transients.
For engineers reviewing the SM6T27CAHE3_B/I datasheet, SM6T27CAHE3_B/I pinout, SM6T27CAHE3_B/I application, or SM6T27CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low inductance, and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical VBR, VWM (23.1 V), and VC characteristics in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and robust surge handling under repetitive transients.
Designed for surface-mount automated placement, the device meets MSL Level 1 (260 °C peak reflow) and features low thermal resistance (RθJA = 100 °C/W, RθJL = 20 °C/W), enabling reliable operation up to 150 °C junction temperature without derating on standard PCB pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at IT = 1.0 mA - defines precise voltage threshold where clamping initiates in both directions |
| VWM | 23.1 V - maximum continuous reverse stand-off voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 37.5 V at 16.0 A (10/1000 μs) - limits transient voltage seen by protected ICs to safe levels |
| PPPM | 600 W - sustains high-energy surges common in automotive load-dump and ISO 7637-2 pulses |
| TJ max | +150 °C - supports under-hood automotive environments without thermal derating on standard layouts |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD footprint with 5.59 mm × 3.94 mm outline and 2.20 mm height |
Pinout & Package
SMB (DO-214AA) package: surface-mount, bidirectional device with no polarity marking; terminals are symmetrical anode/cathode pair, matte tin plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) or exit (forward bias) | One side of symmetrical junction; accepts surge current in either direction during clamping |
| Cathode | Transient current exit (reverse bias) or entry (forward bias) | Other side of symmetrical junction; completes bidirectional conduction path with Anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and leakage performance in both polarities eliminates need for orientation-aware layout |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22-A114 |
| 600 W peak pulse rating | Withstands ISO 7637-2 Pulse 1/2a/5a transients without degradation when mounted on 5.0 mm × 5.0 mm copper pads |
| Low inductance design | Minimizes VL = L·di/dt overshoot during fast transients, preserving clamping accuracy below 37.5 V |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in engine control modules from load dump and ESD. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient voltage to ≤37.5 V during 10/1000 μs surges up to 16 A. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V interface ICs while maintaining signal integrity due to low capacitance and symmetrical response. | Use Scenario: Shielding digital input/output channels of programmable logic controllers from field-induced surges in factory automation environments. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp placed directly at connector entry point before protection ICs or optocouplers. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards using a single discrete component with no polarity constraints. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Safeguarding primary-side controller ICs and rectifier bridges in AC-DC adapters against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: First-line transient suppressor absorbing up to 600 W energy before downstream MOVs or fuses activate. Use Value: Extends adapter lifetime by preventing cumulative degradation of silicon devices during repeated 1 kV/2 kV line surges per IEC 61000-4-5. | Use Scenario: Protecting Ethernet PHYs and DSL line drivers from induced transients on twisted-pair telecom lines exposed to outdoor environments. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed across differential pairs to limit common-mode and differential-mode overvoltages. Use Value: Maintains signal fidelity at 100 Mbps+ data rates while meeting GR-1089-CORE surge immunity requirements up to 10/700 μs waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ27CA | Same VBR range (25.7–28.4 V) and PPPM (600 W), but SMA package (smaller 4.5 mm × 2.7 mm footprint, higher RθJA = 130 °C/W) | Preferred for space-constrained consumer designs; less suitable for sustained high-temp automotive use | Select SMAJ27CA only if board area is critical and thermal margin ≥20 °C is available at full power. |
| 1.5KE27CA | Through-hole TO-204AA (DO-41) package, same VBR/VC, but higher PPPM (1500 W); not AEC-Q101 qualified | Used in legacy industrial power supplies where manual assembly and higher surge margin are prioritized over AEC compliance | Choose 1.5KE27CA only for non-automotive, through-hole designs requiring >600 W headroom and no reflow compatibility needed. |
Compared with SMAJ27CA and 1.5KE27CA, SM6T27CAHE3_B/I uniquely combines AEC-Q101 qualification, SMB footprint compatibility with automated SMT lines, and thermal performance optimized for 150 °C under-hood operation-making it the preferred choice for new automotive electronics designs requiring zero-layout-change migration from legacy TVS families.
Availability
SM6T27CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T27CAHE3_B/I 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, precision, and automotive-grade qualification.
The SM6T Series is designed specifically for robust transient voltage suppression in harsh environments, targeting AEC-Q101-compliant automotive electronics, industrial controls, and telecom infrastructure where bidirectional clamping and high surge immunity are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T27CAHE3_B/I?
The "CA" suffix in SM6T27CAHE3_B/I denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage clamping in both forward and reverse directions. This eliminates polarity concerns during PCB layout and enables protection of AC-coupled or differential signal lines. Unlike unidirectional variants (e.g., SM6T27A), SM6T27CAHE3_B/I has no cathode band marking and exhibits identical VBR, VC, and leakage characteristics across both polarities-verified per Vishay Document 88385, Section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SM6T27CAHE3_B/I qualified for automotive applications?
Yes, SM6T27CAHE3_B/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and explicit statement in Vishay Document 88385: "AEC-Q101 qualified available - Automotive ordering code: base P/NHE3". It undergoes stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per JESD22 standards, making it suitable for under-hood and chassis-mounted automotive systems. The device's 150 °C TJ max and MSL Level 1 reflow rating further support automotive manufacturing requirements.
What is the maximum clamping voltage of SM6T27CAHE3_B/I under standard test conditions?
The maximum clamping voltage (VC) of SM6T27CAHE3_B/I is 37.5 V when subjected to a 10/1000 μs waveform at IPPM = 16.0 A, as specified in the "ELECTRICAL CHARACTERISTICS" table of Vishay Document 88385. This value is measured across both terminals during transient conduction and represents the upper bound of voltage imposed on protected circuitry-critical for ensuring compatibility with 3.3 V, 5 V, or 24 V system rails. VC remains consistent regardless of polarity due to the device's bidirectional symmetry.
How does the SMB (DO-214AA) package of SM6T27CAHE3_B/I compare to SMA in size and thermal performance?
The SMB (DO-214AA) package of SM6T27CAHE3_B/I measures 3.94 mm × 5.59 mm with 2.20 mm height, larger than SMA (4.5 mm × 2.7 mm) but offering lower thermal resistance: RθJA = 100 °C/W vs. SMA's typical 130 °C/W. This allows SM6T27CAHE3_B/I to sustain full 600 W pulse power at higher ambient temperatures-especially advantageous in automotive under-hood applications. Both packages support automated placement, but SMB's larger copper pad area improves heat dissipation without requiring additional thermal vias.
What are the soldering requirements for SM6T27CAHE3_B/I?
SM6T27CAHE3_B/I uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is rated MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C. It supports standard lead-free reflow profiles (e.g., IPC/JEDEC J-STD-020) without pre-baking. The device's glass passivated junction ensures stability during thermal cycling, and its DO-214AA outline is compatible with standard SMB footprints in CAD libraries-no special stencil or profile adjustments are needed for successful assembly of SM6T27CAHE3_B/I.
SM6T27CAHE3_B/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T27CAHE3_B/I FAQ
1.How can I place an order for SM6T27CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27CAHE3_B/I 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_B/I reliable?
The price and inventory of SM6T27CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T27CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T27CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27CAHE3_B/I?
SM6T27CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27CAHE3_B/I 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_B/I?
For technical support, including SM6T27CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27CAHE3_B/I requirements.
6.How does Aetrix verify that SM6T27CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T27CAHE3_B/I 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_B/I meets industry standards.
7.What is the process for return or replacement of SM6T27CAHE3_B/I?
All SM6T27CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27CAHE3_B/I, 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_B/I part is unused and in its original packaging.
Return procedure for SM6T27CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27CAHE3_B/I Tags
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