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Vishay General Semiconductor - Diodes Division SM6T27CAHE3_A/I
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- Part No.:
- SM6T27CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27CAHE3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,200
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Product details
Overview
SM6T27CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 37.5 V maximum clamping voltage (VC) at 16 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform. It provides robust ESD and surge protection for automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SM6T27CAHE3_A/I datasheet, SM6T27CAHE3_A/I pinout, SM6T27CAHE3_A/I application, or SM6T27CAHE3_A/I equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 150 °C max junction temperature, low-inductance SMB package, and compliance with IEC 61000-4-2/4-5 standards for system-level transient immunity.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding its standoff voltage (VWM = 23.1 V), it avalanches symmetrically in both directions to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1 μA at VWM).
Designed for surface-mount automated assembly, SM6T27CAHE3_A/I features MSL Level 1 moisture sensitivity, matte tin-plated leads compliant with J-STD-002, and thermal resistance RθJA = 100 °C/W on standard 0.2" × 0.2" copper pads - enabling reliable operation in automotive under-hood environments up to +125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise bidirectional avalanche onset for predictable clamping threshold |
| VWM | 23.1 V - maximum continuous reverse voltage before leakage exceeds 1 μA; sets safe operating margin below VBR |
| VC @ IPPM | 37.5 V at 16 A (10/1000 μs) - limits transient voltage seen by downstream ICs to safe levels |
| PPPM | 600 W - sustains high-energy surges (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure |
| TJ max | +150 °C - supports operation in automotive engine control units and industrial motor drives |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| Package | SMB (DO-214AA) - 3.94 mm × 2.20 mm footprint with gull-wing leads for high-density PCB layout |
Pinout & Package
SMB (DO-214AA) surface-mount package with center cathode band omitted (bidirectional type); terminals are unmarked and symmetrical - polarity is non-applicable. Device mounts on 5.0 mm × 5.0 mm copper pads per JEDEC standard layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional conduction path | No polarity marking required; either terminal serves as input/output for transient suppression in AC or differential signal paths |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; thermally coupled to PCB copper for junction-to-ambient heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands automotive load-dump and inductive switching surges without degradation |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (e.g., ESD > 1 kV/ns) |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow assembly without popcorn or delamination risk |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications requiring zero defect field performance and extended temperature cycling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/FlexRay transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from ISO 7637-2 pulses and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional shunt TVS providing sub-100 ns clamping response to divert surge energy away from precision analog front-ends. Use Value: Maintains signal integrity under ±25 kV contact ESD (IEC 61000-4-2) and prevents latch-up in downstream op-amps or ADCs. | Use Scenario: Safeguarding 24 V DC digital input modules against field-wiring induced transients and relay coil flyback in factory automation systems. IC Role / Device Role / Timing Role: Fast-acting voltage clamp placed directly at connector entry point to absorb 600 W surges before reaching isolation barriers or microcontrollers. Use Value: Eliminates need for external RC snubbers while meeting IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements. |
| Telecom Line Interface Protection | Consumer Appliance Control Board |
Use Scenario: Shielding RS-485/RS-422 data lines in base stations and network equipment from lightning-induced surges and ground potential differences. IC Role / Device Role / Timing Role: Symmetric clamping element placed across differential pair to maintain common-mode rejection during 10/1000 μs surges up to 1 kV. Use Value: Preserves signal eye diagram integrity and avoids bit errors caused by transient-induced common-mode offset. | Use Scenario: Securing microcontroller GPIOs and display backlight drivers in washing machines and HVAC controllers exposed to motor commutation noise. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) bidirectional suppressor that remains transparent during normal 5 V/3.3 V logic operation but activates within nanoseconds during ESD events. Use Value: Prevents firmware lockup and extends product lifecycle in high-humidity, vibration-prone home appliance environments. |
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, SMA package (larger RθJA = 140 °C/W), same VBR range (26.6–29.4 V) | Limited to lower-power industrial controls; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and higher surge margin |
| 1.5KE27CA | 1500 W PPPM, DO-201 package (through-hole), higher VC = 43.5 V at 34.7 A | Suitable for legacy board designs with through-hole assembly; less suitable for high-density SMT layouts | Choose for legacy repair or high-energy surge zones where PCB space permits larger footprint |
Compared with SMAJ28CA and 1.5KE27CA, SM6T27CAHE3_A/I delivers optimal balance of AEC-Q101 compliance, 600 W surge capability in compact SMB form factor, and low-clamping performance - making it preferred for new automotive and space-constrained industrial designs requiring production-grade reliability.
Availability
SM6T27CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial programmable logic controllers, and telecom line interface circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T27CAHE3_A/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, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 validation are mandatory design requirements.
FAQ
What does the "CA" suffix indicate in SM6T27CAHE3_A/I?
The "CA" suffix in SM6T27CAHE3_A/I denotes a bidirectional configuration - meaning the device clamps voltage transients equally in both polarities, unlike unidirectional variants (e.g., SM6T27A) that only protect against reverse-biased surges. This makes SM6T27CAHE3_A/I ideal for protecting AC-coupled or differential signal lines such as RS-485, CAN, or audio interfaces where polarity reversal may occur.
Is SM6T27CAHE3_A/I suitable for automotive applications?
Yes, SM6T27CAHE3_A/I is AEC-Q101 qualified (confirmed by HE3 suffix and Vishay documentation), tested for high-temperature operation up to +150 °C junction temperature, and validated for automotive stress conditions including temperature cycling, humidity bias, and high-acceleration mechanical shock. It is widely deployed in engine control units, body electronics, and ADAS sensor modules.
What is the maximum clamping voltage of SM6T27CAHE3_A/I under surge conditions?
The maximum clamping voltage (VC) of SM6T27CAHE3_A/I is 37.5 V when subjected to a 10/1000 μs waveform with peak pulse current (IPPM) of 16 A. This value is measured per standardized test conditions and guarantees that protected circuitry will not experience voltages exceeding 37.5 V during specified surge events - critical for safeguarding 3.3 V or 5 V logic components.
How does the SMB (DO-214AA) package of SM6T27CAHE3_A/I compare to SMA in size and thermal performance?
The SMB package of SM6T27CAHE3_A/I measures 3.94 mm × 2.20 mm - approximately 30 % smaller than the SMA (DO-214AC) footprint. Its typical junction-to-ambient thermal resistance is 100 °C/W on 5.0 mm × 5.0 mm copper pads, versus ~140 °C/W for SMA equivalents, enabling higher power handling in constrained layouts without thermal derating penalties.
Does SM6T27CAHE3_A/I require orientation during PCB placement?
No, SM6T27CAHE3_A/I does not require specific orientation during placement because it is a bidirectional device with no polarity marking - the SMB package has no cathode band or anode indicator. Either end connects identically, simplifying automated assembly and eliminating orientation-related solder defects in high-volume manufacturing.
SM6T27CAHE3_A/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:
- Obsolete
- 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_A/I FAQ
1.How can I place an order for SM6T27CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27CAHE3_A/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_A/I reliable?
The price and inventory of SM6T27CAHE3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SM6T27CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27CAHE3_A/I?
SM6T27CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27CAHE3_A/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_A/I?
For technical support, including SM6T27CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27CAHE3_A/I requirements.
6.How does Aetrix verify that SM6T27CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T27CAHE3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SM6T27CAHE3_A/I?
All SM6T27CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27CAHE3_A/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_A/I part is unused and in its original packaging.
Return procedure for SM6T27CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27CAHE3_A/I Tags
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