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Vishay General Semiconductor - Diodes Division SM6T30CAHM3/I
- Part No.:
- SM6T30CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T30CAHM3/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,217
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Product details
Overview
SM6T30CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 30 V standoff voltage (VWM), 33.2 V minimum breakdown (VBR), 600 W peak pulse power (10/1000 μs), and 150 °C max junction temperature - used to protect automotive sensor signal lines, power rails, and I/O interfaces against ESD and load-switching transients.
For engineers reviewing the SM6T30CAHM3/I datasheet, SM6T30CAHM3/I pinout, SM6T30CAHM3/I application, or SM6T30CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping voltage (VC = 48.3 V at IPPM), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix designation, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM), while the SMB package delivers low inductance and meets MSL Level 1 reflow requirements (260 °C peak).
The device is rated for 600 W peak pulse power under standardized 10/1000 μs waveform conditions, with clamping voltage tightly specified at 48.3 V (max) at 16 A peak pulse current - critical for safeguarding 3.3 V/5 V/12 V logic and analog circuitry in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min) | 33.2 V - guaranteed breakdown starts no lower than this, ensuring reliable overvoltage detection |
| VC @ IPPM | 48.3 V - clamping voltage at 16 A pulse, limiting protected circuit stress during surge events |
| PPPM | 600 W - peak transient energy absorption capacity per 10/1000 μs waveform |
| TJ max | +150 °C - enables operation in under-hood automotive locations with high ambient thermal loads |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm body length and 2.20 mm height |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance. Bidirectional construction means no polarity marking - terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve as interchangeable surge current entry/exit points; no cathode band marking |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, LIN), and ungrounded power domains |
| AEC-Q101 qualification | Validated for automotive-grade deployment including engine control units, ADAS sensors, and body electronics |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow soldering up to 260 °C peak |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during transients, reducing risk of downstream IC latch-up or damage |
| 600 W pulse rating with low inductance | Provides robust immunity to ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surge events in compact layout |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing fast-rising transients before they reach ADC inputs or op-amp buffers. Use Value: Prevents sensor signal corruption and microcontroller reset events by limiting voltage excursion to ≤48.3 V during 16 A surges. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers interfacing with solenoids and contactors. IC Role / Device Role / Timing Role: Transient suppression at field-side connector interface to absorb inductive kickback from switched loads. Use Value: Eliminates need for external RC snubbers while maintaining <1 μA leakage at 30 V nominal bus voltage. |
| Automotive Body Control Module | Consumer Appliance Power Supply |
Use Scenario: Clamping voltage spikes on 12 V supply rails feeding door lock actuators, window lift motors, and lighting drivers. IC Role / Device Role / Timing Role: Primary overvoltage protection element placed adjacent to power entry point on BCM PCB. Use Value: Withstands repeated 600 W pulses without degradation, supporting 15-year vehicle service life per AEC-Q101 requirements. | Use Scenario: Protecting secondary-side DC outputs of switch-mode power supplies in washing machines and HVAC controls. IC Role / Device Role / Timing Role: Secondary-side transient suppressor on regulated 5 V/12 V rails feeding MCU and display subsystems. Use Value: Halogen-free construction complies with IEC 62368-1 safety standards and avoids toxic gas emission during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA | Same VWM (30 V), lower PPPM (400 W), SMA package (larger footprint, higher RθJA) | Lacks AEC-Q101 qualification; suitable for commercial-grade industrial use only | Select when cost sensitivity outweighs automotive qualification and higher surge margin |
| 1.5KE30CA | Higher PPPM (1500 W), axial-leaded DO-201 package, not SMT-compatible | Requires through-hole assembly; unsuitable for high-density automotive PCBs | Choose only for legacy designs or prototyping where manual assembly is acceptable |
Compared with SMAJ30CA and 1.5KE30CA, SM6T30CAHM3/I offers the optimal balance of AEC-Q101 compliance, 600 W surge capability, SMB footprint efficiency, and halogen-free manufacturability - making it the preferred choice for new automotive and industrial SMT designs requiring long-term supply stability.
Availability
SM6T30CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and body control module power rail stabilization requiring stable component supply across multi-year production cycles.
Supply support for SM6T30CAHM3/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, power efficiency, and automotive-grade validation.
The SM6T Series is designed specifically for robust transient suppression in space-constrained, high-reliability applications - particularly automotive electronics where AEC-Q101 qualification, low clamping voltage, and SMT compatibility are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T30CAHM3/I?
The "CA" suffix in SM6T30CAHM3/I denotes a bidirectional configuration, meaning the device clamps voltage transients equally in both polarities - essential for protecting AC-coupled signals, differential buses like CAN, or ungrounded power domains without concern for orientation during placement.
Is SM6T30CAHM3/I qualified for automotive applications?
Yes, SM6T30CAHM3/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM6T datasheet (Rev. 09-Jan-2024). This qualification covers temperature cycling, high-temperature reverse bias, and ESD testing required for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of SM6T30CAHM3/I at rated surge current?
The maximum clamping voltage (VC) of SM6T30CAHM3/I is 48.3 V at 16 A peak pulse current (IPPM) under the standard 10/1000 μs waveform - a critical parameter ensuring downstream ICs experience minimal overvoltage stress during transient events.
Does SM6T30CAHM3/I require polarity-aware PCB layout?
No - SM6T30CAHM3/I is bidirectional and has no cathode marking; both terminals are electrically identical. PCB layout requires no orientation consideration, simplifying automated placement and reducing assembly errors in high-volume SMT production.
What is the thermal resistance of SM6T30CAHM3/I from junction to ambient?
The typical junction-to-ambient thermal resistance (RθJA) of SM6T30CAHM3/I is 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal - a value used to estimate temperature rise under continuous power dissipation and verify safe operation within the 150 °C max junction limit.
SM6T30CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 14.5A
- 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 (SMB)
SM6T30CAHM3/I FAQ
1.How can I place an order for SM6T30CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T30CAHM3/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 SM6T30CAHM3/I reliable?
The price and inventory of SM6T30CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T30CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM6T30CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T30CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T30CAHM3/I?
SM6T30CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T30CAHM3/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 SM6T30CAHM3/I?
For technical support, including SM6T30CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T30CAHM3/I requirements.
6.How does Aetrix verify that SM6T30CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6T30CAHM3/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 SM6T30CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM6T30CAHM3/I?
All SM6T30CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T30CAHM3/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 SM6T30CAHM3/I part is unused and in its original packaging.
Return procedure for SM6T30CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T30CAHM3/I Tags
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