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Vishay General Semiconductor - Diodes Division SM6T27CAHE3/5B
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- Part No.:
- SM6T27CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27CAHE3/5B.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,327
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Product details
Overview
SM6T27CAHE3/5B 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, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use - deployed to protect MOSFETs and sensor interfaces in engine control units.
For engineers reviewing the SM6T27CAHE3/5B datasheet, SM6T27CAHE3/5B pinout, SM6T27CAHE3/5B application, or SM6T27CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, low-inductance SMB layout compatibility, AEC-Q101 qualification status, and verified 37.5 V clamping performance under 16 A 10/1000 μs surge conditions.
Technical Context
The SM6T27CAHE3/5B operates as a bidirectional avalanche diode with symmetrical forward/reverse breakdown characteristics, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable leakage (<1.0 μA at 23.1 V) and repeatable clamping across temperature.
Thermal design relies on RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), requiring minimum 0.2" × 0.2" copper pads per terminal for rated 600 W pulse handling. The device is rated for TJ = –65 °C to +150 °C 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 1.0 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| 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) - actual clamped voltage seen by protected circuit during surge |
| PPPM | 600 W - peak transient power absorption capacity under standardized 10/1000 μs waveform |
| TJ range | –65 °C to +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 qualified | Yes - validated for automotive electronics per stress test requirements including HTOL, TC, UHAST |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated placement and IPC-7351B land pattern |
Pinout & Package
SM6T27CAHE3/5B uses an SMB (DO-214AA) plastic package with two terminals: no polarity marking for bidirectional operation. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay's thermal derating guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional conduction path | No polarity marking required; either terminal serves as anode or cathode depending on transient polarity |
| Case (plastic body) | Isolation barrier | UL 94 V-0 rated molding compound provides electrical insulation and flame resistance |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a surges in 12 V automotive systems |
| AEC-Q101 qualification (HE3 suffix) | Confirms reliability for automotive ECUs, ADAS sensors, and body control modules |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during fast transients, reducing risk of downstream IC latch-up |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking preconditioning |
| Glass-passivated junction | Ensures stable leakage current (<1 μA) and consistent VBR over 15-year field life |
Applications
| Automotive Engine Control Unit (ECU) | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protects microcontroller I/O and driver outputs from load dump and inductive switching spikes in 12 V powertrain systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt transients before reaching MCU GPIO or LIN transceivers. Use Value: Clamps 37.5 V at 16 A surge, maintaining safe voltage margin below 40 V absolute maximum ratings of typical automotive MCUs. |
Use Scenario: Shields CANH/CANL differential pair from ESD and burst noise in factory automation PLCs and motor drives. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor installed across differential bus lines to preserve signal integrity up to 1 Mbps. Use Value: Symmetrical clamping prevents common-mode shift during transients, avoiding CAN frame errors or bus lockup. |
| Consumer Smart Appliance Motor Driver | Telecom Power Supply Input Stage |
Use Scenario: Safeguards gate drivers and bootstrap circuits in BLDC motor inverters inside washing machines and HVAC systems. IC Role / Device Role / Timing Role: Placed across DC-link rails to absorb commutation spikes generated by high-dI/dt motor phase switching. Use Value: 600 W pulse rating handles repetitive 100 ns–1 μs spikes without degradation, supporting >100,000 cycle lifetime. |
Use Scenario: Provides primary-level surge immunity on AC/DC adapter inputs exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: First-stage protector ahead of bridge rectifier and bulk capacitor to limit let-through energy to downstream components. Use Value: 37.5 V clamping ensures secondary-side regulators and controllers remain within safe operating area during 1 kV/2 kA surges. |
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, VC = 45.4 V @ 13.2 A, SMA package (larger RθJA = 150 °C/W) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and higher clamping voltage is acceptable |
| 1.5KE27CA | 1500 W PPPM, DO-204AC (DO-15) through-hole package, VC = 43.0 V @ 35.0 A | Requires PCB through-hole mounting; unsuitable for high-density SMT designs | Choose for legacy board upgrades or high-surge industrial power supplies where manual assembly is acceptable |
Compared with SMAJ28CA and 1.5KE27CA, SM6T27CAHE3/5B delivers optimal balance of AEC-Q101 compliance, compact SMB footprint, and 37.5 V clamping - making it preferred for new automotive and space-constrained industrial designs requiring validated reliability and low let-through voltage.
Availability
SM6T27CAHE3/5B is available at Aetrix Electronics and suitable for automotive ECU protection, industrial CAN bus shielding, and consumer appliance motor drive surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SM6T27CAHE3/5B 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, and protection devices with emphasis on reliability and automotive-grade validation.
The SM6T Series was developed specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - combining AEC-Q101 qualification, low-inductance SMB packaging, and tightly controlled clamping performance.
FAQ
What does the "CA" suffix indicate in SM6T27CAHE3/5B?
The "CA" suffix denotes that SM6T27CAHE3/5B is a bidirectional transient voltage suppressor, meaning it provides symmetrical clamping in both polarities - essential for protecting AC-coupled lines, differential buses like CAN or RS-485, and circuits where voltage polarity reversal may occur during transients.
Is SM6T27CAHE3/5B suitable for automotive applications?
Yes, SM6T27CAHE3/5B carries the HE3 suffix, confirming full AEC-Q101 qualification for automotive use. It has passed stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - making it appropriate for engine control units, body electronics, and ADAS sensor modules.
What is the maximum clamping voltage of SM6T27CAHE3/5B under surge conditions?
The maximum clamping voltage of SM6T27CAHE3/5B is 37.5 V when subjected to a 10/1000 μs waveform with a peak pulse current of 16.0 A. This value is measured per JEDEC standards and guarantees the protected circuit sees no more than 37.5 V during such transient events.
How does the SMB package of SM6T27CAHE3/5B affect thermal performance?
The SMB (DO-214AA) package of SM6T27CAHE3/5B provides RθJA = 100 °C/W (typ.) when mounted on 0.2" × 0.2" copper pads. This enables effective heat dissipation during 600 W pulse events, but requires adherence to Vishay's recommended pad layout to maintain rated surge capability and avoid thermal runaway.
Does SM6T27CAHE3/5B have polarity markings on the device body?
No, SM6T27CAHE3/5B has no polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SM6T27A), the CA version exhibits identical electrical behavior in both directions - eliminating the need for cathode band identification during placement.
SM6T27CAHE3/5B 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)
SM6T27CAHE3/5B FAQ
1.How can I place an order for SM6T27CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27CAHE3/5B 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 SM6T27CAHE3/5B reliable?
The price and inventory of SM6T27CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T27CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SM6T27CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27CAHE3/5B?
SM6T27CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27CAHE3/5B 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 SM6T27CAHE3/5B?
For technical support, including SM6T27CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27CAHE3/5B requirements.
6.How does Aetrix verify that SM6T27CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T27CAHE3/5B 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 SM6T27CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SM6T27CAHE3/5B?
All SM6T27CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27CAHE3/5B, 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 SM6T27CAHE3/5B part is unused and in its original packaging.
Return procedure for SM6T27CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27CAHE3/5B Tags
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