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Vishay General Semiconductor - Diodes Division SM6A27THE3/I
- Part No.:
- SM6A27THE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6A27THE3/I.pdf
- Description:
- TVS DIODE 22VWM 40VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,687
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Product details
Overview
SM6A27THE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 22 V working stand-off voltage (VWM), 27 V breakdown voltage (VBR), 4600 W peak pulse power (10/1000 μs), AEC-Q101 qualification, and DO-218AC package with heatsink-anode polarity.
For engineers reviewing the SM6A27THE3/I datasheet, SM6A27THE3/I pinout, SM6A27THE3/I application, or SM6A27THE3/I equivalent, key selection criteria include ISO7637-2 compliance, TJ = 175 °C operation, low leakage (<0.5 μA at 25 °C), clamping voltage ≤40.0 V at 65 A, and MSL Level 1 reflow capability.
Technical Context
The SM6A27THE3/I employs passivated anisotropic rectifier technology to deliver high-temperature stability and low forward voltage drop (≤0.99 V at 6 A). Its unidirectional configuration and heatsink-anode polarity enable direct thermal coupling to PCB copper for enhanced surge dissipation in automotive power rails.
It meets ISO7637-2 load dump waveforms with 10 ms exponential decay and supports 90 A non-repetitive reverse surge current (IRSM) and 600 A forward surge current (IFSM). Thermal resistance is specified at RθJC = 0.95 °C/W, enabling effective heat transfer under sustained transient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse voltage before clamping begins; defines safe operating window in 24 V automotive systems. |
| VBR | 27 V (min–max: 24–30 V at 10 mA) - Voltage at which device enters avalanche conduction; ensures reliable turn-on during transients. |
| PPPM | 4600 W (10/1000 μs) - Peak pulse power handling capacity; sustains high-energy load dump events without failure. |
| VC @ IPP = 65 A | ≤40.0 V - Clamping voltage under standardized surge; limits downstream IC stress during ISO7637-2 pulses. |
| TJ max. | +175 °C - Maximum junction temperature; enables placement near hot engine-control electronics. |
| RθJC | 0.95 °C/W - Junction-to-case thermal resistance; allows precise thermal design when mounted on copper heatsink pads. |
| Polarity | Unidirectional, anode = metal heatsink - Defines mounting orientation and PCB pad layout for optimal thermal path. |
Pinout & Package
Package: DO-218AC - Surface-mount molded case with integral metal heatsink terminal; UL 94 V-0 rated; matte tin-plated leads; JESD 201 Class 2 whisker resistant; MSL Level 1 (245 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Metal Heatsink) | High-current return path & thermal interface | Must be soldered to large copper pour for thermal management; electrically connects to system ground or battery negative in load dump protection. |
| Cathode (Lead 1) | Transient voltage sensing & clamping node | Connects to protected line (e.g., alternator output); carries full surge current during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood environments including temperature cycling, humidity, and mechanical shock per JEDEC standards. |
| ISO7637-2 compliant | Withstands 10 ms exponential load dump pulses up to 4600 W without degradation-meets OEM-level powertrain requirements. |
| Junction passivation | Optimized die surface treatment prevents moisture-induced leakage drift and improves long-term reliability at 175 °C. |
| Low IR at 175 °C | ≤20.0 μA reverse leakage at max junction temperature-maintains low standby power loss in always-on vehicle modules. |
| DO-218AC mechanical robustness | Integral metal heatsink provides >3× thermal mass vs. SMC packages; withstands vibration and thermal cycling in engine bay mounting. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects 24 V power rail of vehicle infotainment head units during alternator load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transient overvoltage to ≤40.0 V while diverting up to 90 A surge current away from DC/DC converters and microcontrollers. Use Value: Prevents latch-up or permanent damage to downstream PMICs and SoCs during ISO7637-2 Pulse 5a/b events. | Use Scenario: Installed at main 24 V input of diesel ECU to absorb energy from sudden battery disconnect or alternator regulation failure. IC Role / Device Role / Timing Role: Acts as primary overvoltage clamp on power entry point; coordinates with secondary ceramic capacitors to filter fast-rising edges. Use Value: Enables uninterrupted operation during 120 V/10 ms transients-critical for ASIL-B functional safety compliance. |
| Body Control Module (BCM) Power Distribution | ADAS Camera Power Conditioning |
Use Scenario: Mounted on BCM main power board to protect LIN bus regulators and CAN transceivers from coupled transients. IC Role / Device Role / Timing Role: Provides fast-response clamping (ns-scale turn-on) ahead of linear regulators feeding sensitive analog sensors. Use Value: Limits voltage excursion to <40 V for >100 ms duration-preserves regulator dropout margin and avoids brownout resets. | Use Scenario: Placed at 12 V input of front-facing ADAS camera module to suppress ignition noise and load dump spikes. IC Role / Device Role / Timing Role: Shields image sensor and ISP power rails; leverages low leakage (<0.5 μA at 25 °C) to avoid signal integrity degradation in low-power sleep modes. Use Value: Maintains clean power during cold-cranking and start-stop cycles-reduces frame drop and image artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM6A27HM3 | Same VWM/VBR/PPPM specs; DO-218AB package (slightly smaller footprint); no HE3 suffix-lacks JESD 201 Class 2 whisker test certification. | Not qualified to same automotive reliability standard; not recommended for new designs targeting AEC-Q101 compliance. | Select SM6A27HM3 only for legacy repair or cost-sensitive non-automotive industrial use where whisker resistance is not required. |
| SMAJ22A | Lower PPPM (400 W); SMA package (RθJC ≈ 35 °C/W); VWM = 22 V but VBR min = 24.4 V; no AEC-Q101 or ISO7637-2 validation. | Limited to low-energy transients in consumer or industrial equipment-not suitable for automotive load dump. | Use SMAJ22A only in non-automotive 24 V systems with <500 W surge exposure and ambient <125 °C. |
Compared with SM6A27HM3 and SMAJ22A, the SM6A27THE3/I delivers superior thermal performance (RθJC = 0.95 °C/W), verified ISO7637-2 capability, and full AEC-Q101 qualification-making it the only option qualified for new automotive designs requiring load dump immunity and 175 °C operation.
Availability
SM6A27THE3/I is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) power input, and body control module (BCM) power distribution requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for SM6A27THE3/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 devices, and MOSFETs for automotive, industrial, and computing applications.
The SM6A27THE3/I belongs to Vishay's PAR® (Protected Automotive Rectifier) family-engineered specifically for high-energy transient suppression in 12 V/24 V automotive power networks under extreme thermal and mechanical stress.
FAQ
What is the maximum clamping voltage of the SM6A27THE3/I at 65 A?
The SM6A27THE3/I has a maximum clamping voltage (VC) of 40.0 V when subjected to a 10 μs/10 ms exponentially decaying waveform at 65 A peak current. This value is measured at TC = 25 °C and ensures downstream components remain within safe operating voltage limits during ISO7637-2 load dump events. The SM6A27THE3/I maintains this clamping performance across its full operating temperature range.
Is the SM6A27THE3/I suitable for new automotive designs?
No-the SM6A27THE3/I is marked "Not For New Designs" in Vishay's official documentation, with SM6A27HM3 cited as the alternative device. However, SM6A27THE3/I remains fully qualified (AEC-Q101, ISO7637-2, MSL Level 1) and available for production continuity, repair, or legacy program support. Engineers designing new systems should evaluate SM6A27HM3 or next-generation PAR® devices.
What does the HE3 suffix indicate in SM6A27THE3/I?
HE3 denotes RoHS-compliant construction, AEC-Q101 qualification, and compliance with JESD 201 Class 2 whisker testing-ensuring long-term solder joint reliability under thermal cycling in automotive environments. The "I" package code specifies 13-inch plastic tape-and-reel delivery with anode oriented toward sprocket holes, enabling automated placement.
How is thermal management implemented for the SM6A27THE3/I?
The SM6A27THE3/I uses its metal heatsink (anode terminal) as the primary thermal path. With RθJC = 0.95 °C/W, effective cooling requires soldering the heatsink to ≥100 mm² of 2 oz copper on the PCB. Layout must follow Vishay's DO-218AC mounting pad dimensions (0.413 × 0.374 inches) to ensure mechanical stability and thermal transfer-critical for sustaining 4600 W surges without junction overheating.
Does the SM6A27THE3/I meet MSL Level 1 reflow requirements?
Yes-the SM6A27THE3/I meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 245 °C. Its DO-218AC package uses UL 94 V-0 molding compound and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. This enables single-pass lead-free reflow without popcorn cracking or delamination, supporting high-yield SMT assembly in automotive manufacturing lines.
SM6A27THE3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24V
- Voltage - Clamping (Max) @ Ipp:
- 40V
- Current - Peak Pulse (10/1000µs):
- 65A (8/20µs)
- Power - Peak Pulse:
- 4600W (4.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM6A27THE3/I FAQ
1.How can I place an order for SM6A27THE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6A27THE3/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 SM6A27THE3/I reliable?
The price and inventory of SM6A27THE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6A27THE3/I is usually 5 days.
3.What payment methods are accepted for SM6A27THE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6A27THE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6A27THE3/I?
SM6A27THE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6A27THE3/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 SM6A27THE3/I?
For technical support, including SM6A27THE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6A27THE3/I requirements.
6.How does Aetrix verify that SM6A27THE3/I is sourced from the original manufacturer or authorized distributors?
All SM6A27THE3/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 SM6A27THE3/I meets industry standards.
7.What is the process for return or replacement of SM6A27THE3/I?
All SM6A27THE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6A27THE3/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 SM6A27THE3/I part is unused and in its original packaging.
Return procedure for SM6A27THE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6A27THE3/I Tags
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