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Vishay General Semiconductor - Diodes Division SM6T27CAHM3_B/I
- Part No.:
- SM6T27CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27CAHM3_B/I.pdf
- Description:
- 600W,27V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,115
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Product details
Overview
SM6T27CAHM3_B/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 600 W peak pulse power (10/1000 μs), and clamping voltage of 37.5 V at 16 A. It protects signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the SM6T27CAHM3_B/I datasheet, SM6T27CAHM3_B/I pinout, SM6T27CAHM3_B/I application, or SM6T27CAHM3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.39), and SMB package thermal resistance (RθJA = 100 °C/W).
Technical Context
This TVS operates symmetrically in both polarities due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at 23.1 V).
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 with 260 °C reflow peak, and delivers 37.5 V clamping at 16 A IPPM under 10/1000 μs waveform - critical for safeguarding 3.3 V/5 V/12 V logic interfaces and MOSFET gate drivers against ISO 7637-2 Pulse 1/2a/5a transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise voltage threshold where clamping initiates, ensuring reliable protection above system operating voltage. |
| VWM | 23.1 V - maximum continuous reverse stand-off voltage; device remains non-conductive below this level during normal operation. |
| VC @ IPPM | 37.5 V at 16 A (10/1000 μs) - actual clamped voltage seen by protected circuit during surge, limiting stress on downstream ICs. |
| PPPM | 600 W - peak pulse power handling capacity, enabling robust suppression of automotive load-dump and inductive kick events. |
| TJ max | +150 °C - maximum junction temperature rating supports operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient; requires minimum 5.0 mm × 5.0 mm copper pad per terminal for full derating. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Either terminal serves as input/output for bidirectional surge conduction; no cathode band marking required. |
| Case (body) | Thermal and mechanical interface | Plastic SMB body provides UL 94 V-0 flammability rating and mechanical stability during reflow and vibration. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and floating power domains without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-20E environmental standards for green manufacturing and end-of-life processing. |
| Low clamping ratio (VC/VBR) | 1.39 - minimizes overvoltage exposure during transients, improving margin for 3.3 V and 5 V logic-level components. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to ISO 7637-2 Pulse 5a (50 V/100 ms). IC Role / Device Role / Timing Role: Bidirectional TVS clamps positive and negative transients before they reach ADC front-end or op-amp buffer stages. Use Value: Prevents latch-up or permanent damage to 12-bit SAR ADCs operating at ±10 V full-scale range while maintaining signal integrity below 23.1 V nominal. | Use Scenario: Shielding 24 V DC digital input channels on programmable logic controller (PLC) modules from field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Fast-response TVS shunts >1 kV transients within nanoseconds, preserving optocoupler isolation integrity and preventing false triggering of microcontroller GPIOs. Use Value: Enables >100,000 actuation cycles without degradation, verified per IEC 61000-4-5 Level 3 (2 kV line-earth) immunity testing. |
| Consumer USB Port ESD Protection | Telecom Line Interface Protection |
Use Scenario: Safeguarding USB 2.0 D+/D− data lines in portable medical devices against human-body-model (HBM) ESD up to ±15 kV. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp limits voltage excursion during sub-nanosecond ESD events without distorting 480 Mbps signaling. Use Value: Maintains signal rise/fall time <1 ns and insertion loss <0.5 dB up to 200 MHz, meeting USB-IF compliance requirements. | Use Scenario: Protecting FXS/FXO line interface circuits in VoIP gateways from lightning-induced surges on POTS lines per ITU-T K.20/21. IC Role / Device Role / Timing Role: High-energy TVS absorbs multi-kA surges while coordinating with gas discharge tube (GDT) primary protection stage. Use Value: Achieves coordinated clamping at <120 V across 100 Ω source impedance, preventing transformer saturation and codec IC damage. |
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 (higher RθJA = 140 °C/W), VBR = 26.6–29.4 V | Limited to lower-energy transients; unsuitable for automotive load-dump per ISO 16750-2. | Select when cost sensitivity outweighs peak power requirement and board space allows larger standoff. |
| SMCJ28CA | 1500 W PPPM, SMC package (lower RθJA = 35 °C/W), VBR = 26.6–29.4 V | Over-specified for PCB space-constrained designs; requires larger pad layout (≥10 mm² per terminal). | Choose for high-reliability industrial motor drives where surge repetition rate exceeds 1 Hz. |
Compared with SMAJ28CA and SMCJ28CA, SM6T27CAHM3_B/I delivers optimal balance of 600 W surge handling, AEC-Q101 qualification, SMB footprint, and halogen-free compliance - making it the preferred choice for space-limited automotive and industrial edge nodes requiring validated reliability and regulatory alignment.
Availability
SM6T27CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SM6T27CAHM3_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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series targets high-volume, high-reliability transient suppression in automotive, industrial, and communications systems - engineered for AEC-Q101 compliance, automated assembly, and consistent clamping performance across temperature and lifetime.
FAQ
What is the breakdown voltage tolerance for SM6T27CAHM3_B/I?
The SM6T27CAHM3_B/I has a specified breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1 mA test current, representing a ±5% tolerance around the nominal 27 V rating. This tight tolerance ensures predictable clamping onset across production lots and temperature ranges from −65 °C to +150 °C, critical for protecting precision analog circuits in automotive and industrial applications.
Is SM6T27CAHM3_B/I suitable for automotive applications?
Yes, SM6T27CAHM3_B/I is AEC-Q101 qualified and designated with the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It meets stringent stress tests including temperature cycling, humidity bias, and mechanical shock - making it suitable for engine control units, ADAS camera modules, and body electronics where reliability under harsh conditions is mandatory.
What does the "CA" suffix indicate in SM6T27CAHM3_B/I?
The "CA" suffix in SM6T27CAHM3_B/I explicitly denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., SM6T27A), this version has no polarity marking and is used for AC signal lines, differential buses, or floating power domains where voltage reversals occur during normal operation or fault conditions.
What is the maximum clamping voltage of SM6T27CAHM3_B/I under standard test conditions?
The SM6T27CAHM3_B/I exhibits a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 16 A. This value is measured per Fig. 1 and Fig. 3 of Vishay document 88385 and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events, directly supporting design margin calculations for 24 V systems.
How does the SMB package of SM6T27CAHM3_B/I affect thermal performance?
The SMB (DO-214AA) package of SM6T27CAHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This necessitates careful PCB layout to avoid thermal runaway during repetitive surges; doubling pad area reduces RθJA by ~20%, but the device remains optimized for single-event protection rather than continuous power dissipation.
SM6T27CAHM3_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)
SM6T27CAHM3_B/I FAQ
1.How can I place an order for SM6T27CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27CAHM3_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 SM6T27CAHM3_B/I reliable?
The price and inventory of SM6T27CAHM3_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 SM6T27CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T27CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27CAHM3_B/I?
SM6T27CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27CAHM3_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 SM6T27CAHM3_B/I?
For technical support, including SM6T27CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27CAHM3_B/I requirements.
6.How does Aetrix verify that SM6T27CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T27CAHM3_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 SM6T27CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T27CAHM3_B/I?
All SM6T27CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27CAHM3_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 SM6T27CAHM3_B/I part is unused and in its original packaging.
Return procedure for SM6T27CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27CAHM3_B/I Tags
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Diodes Incorporated
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