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Vishay General Semiconductor - Diodes Division SM6A27HE3/2D
- Part No.:
- SM6A27HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6A27HE3/2D.pdf
- Description:
- TVS DIODE 22VWM 40VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,839
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Product details
Overview
SM6A27HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor designed for automotive load dump protection. It features a 27 V breakdown voltage (VBR = 24–30 V), 4600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for operation up to TJ = 175 °C in harsh environments.
For engineers reviewing the SM6A27HE3/2D datasheet, SM6A27HE3/2D pinout, SM6A27HE3/2D application, or SM6A27HE3/2D equivalent, key selection criteria include its DO-218AB package thermal performance (RθJM = 0.45 °C/W), low clamping voltage (VC ≤ 40.0 V at IPP = 65 A), and compliance with ISO7637-2 surge requirements.
Technical Context
The SM6A27HE3/2D uses passivated anisotropic rectifier technology to achieve low leakage (≤0.5 μA at 22 V, 25 °C) and low forward voltage (VF ≤ 0.99 V at 6 A). Its unidirectional polarity and heatsink-anode configuration enable efficient thermal coupling to PCB copper planes.
It delivers high-reliability transient suppression under automotive conditions: meets MSL Level 1 (245 °C reflow), JESD201 Class 2 whisker resistance, and UL 94 V-0 molding compound rating - all validated per AEC-Q101 stress test protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR | 24–30 V at 10 mA - ensures precise overvoltage triggering within automotive 24 V system tolerances |
| VWM | 22 V - maximum continuous reverse stand-off voltage compatible with 24 V nominal bus |
| PPPM (10/1000 μs) | 4600 W - sustains high-energy load dump transients without failure |
| VC @ 65 A | ≤40.0 V - limits protected circuit voltage during surge, preserving downstream ICs |
| TJ max | 175 °C - enables placement near hot engine-control components without derating |
| RθJM | 0.45 °C/W - supports direct thermal path to heatsink plane for stable power dissipation |
| IFSM | 600 A - withstands repetitive 8.3 ms half-sine surges common in alternator switching |
Pinout & Package
Package: DO-218AB - thermally optimized surface-mount outline with metal heatsink terminal (anode) and molded cathode lead; meets IPC-7351 footprint standards and UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Positive DC return path and primary thermal interface | Must be soldered to ≥100 mm² copper pour for RθJM = 0.45 °C/W performance |
| Cathode | Transient current sink during clamping event | Connected to protected line (e.g., battery rail); polarity-sensitive installation required |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Enables stable leakage performance (<0.5 μA) across -55 to +175 °C operating range |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and body electronics under temperature cycling, HTRB, and ESD stress |
| ISO7637-2 compliance | Guarantees immunity to standardized automotive load dump pulses (Pulse 5a/b) without degradation |
| MSL Level 1 rating | Permits standard SMT reflow (peak 245 °C) without moisture-induced popcorn failure |
| Matte tin plating | Ensures solderability per J-STD-002 and long-term intermetallic stability on FR4 |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Body Control Module (BCM) Bus Line |
|---|---|
Use Scenario: Protects 24 V supply input of diesel/gasoline ECU against alternator load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamps reverse-polarity surges while maintaining low leakage during normal operation. Use Value: Limits clamped voltage to ≤40.0 V at 65 A, preventing damage to MCU power regulators rated for 42 V absolute max. | Use Scenario: Shields LIN/CAN power rails in BCM from switching noise and battery disconnect spikes. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at board-level entry point before local LDOs. Use Value: Withstands 3600 W (10/10,000 μs) surges and maintains <20 μA leakage at 175 °C junction temp. |
| Start-Stop System Battery Interface | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Guards start-stop controller's main 24 V input during repeated engine cranking and restart events. IC Role / Device Role / Timing Role: High-surge-capability TVS absorbs repetitive 100 A+ transients induced by solenoid actuation. Use Value: Rated IPPM = 90 A and IFSM = 600 A ensure no parametric shift after >1000 load dump cycles. | Use Scenario: Protects EPS H-bridge gate driver supply from motor back-EMF and PWM switching transients. IC Role / Device Role / Timing Role: Primary clamping device on 24 V rail upstream of buck converter input. Use Value: Low VF (≤0.94 V at 100 A) minimizes conduction loss during sustained clamping events. |
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 electrical specs; differs only in packaging - HM3 denotes halogen-free, matte tin, MSL Level 1 tape-and-reel (750 pcs/reel vs. 2D's 750 pcs/reel) | No functional difference; identical AEC-Q101 qualification and thermal performance | Select SM6A27HM3 for RoHS-compliant supply chains requiring halogen-free materials |
| SMAJ27A | Lower PPPM (400 W vs. 4600 W); DO-214AC package; RθJA = 50 °C/W (vs. 0.45 °C/W) | Not suitable for automotive load dump; limited to low-energy ESD/surge in consumer electronics | Use SMAJ27A only in non-automotive, low-power applications where 4600 W capability is unnecessary |
Compared with SM6A27HM3, the SM6A27HE3/2D offers identical protection performance but uses E3 (non-halogen-free) termination; compared with SMAJ27A, it delivers 11.5× higher surge power handling and 111× better thermal resistance to heatsink - critical for under-hood automotive deployment.
Availability
SM6A27HE3/2D is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics, and electric power steering systems requiring stable component supply and full AEC-Q101 traceability.
Supply support for SM6A27HE3/2D 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices for industrial, automotive, and computing markets.
The SM6A27HE3/2D belongs to Vishay's PAR® (Protection and Regulation) TVS family, engineered specifically for high-energy automotive load dump and ISO7637-2 compliance in under-hood environments.
FAQ
What is the maximum clamping voltage of the SM6A27HE3/2D at 65 A?
The SM6A27HE3/2D has a maximum clamping voltage (VC) of 40.0 V when subjected to a 10 μs/10 ms exponentially decaying waveform at IPP = 65 A. This value is measured per the manufacturer's test conditions and ensures downstream 42 V-rated components remain within safe operating limits during load dump events. The SM6A27HE3/2D achieves this clamping performance while maintaining thermal stability up to 175 °C junction temperature.
Is the SM6A27HE3/2D suitable for new automotive designs?
No - the SM6A27HE3/2D is marked "Not For New Designs" in its official Vishay documentation, with SM6A27HM3 designated as the recommended alternative. While the SM6A27HE3/2D remains fully functional and qualified (AEC-Q101), new designs should use SM6A27HM3 to ensure long-term material compliance (halogen-free) and continued supply chain alignment. The SM6A27HE3/2D is supported for existing production and legacy program continuity.
What does the '2D' suffix indicate in SM6A27HE3/2D?
The '2D' suffix in SM6A27HE3/2D specifies the packaging configuration: 13-inch diameter plastic tape and reel, with 750 units per reel, and anode orientation toward the sprocket hole. This matches JEDEC-standard automated pick-and-place requirements. The 'E3' prefix confirms RoHS-compliant, lead-free, matte tin terminations, while 'H' denotes AEC-Q101 qualification - all verified in the official Vishay ordering information table for SM6A27HE3/2D.
How does the DO-218AB package of the SM6A27HE3/2D improve thermal performance?
The DO-218AB package of the SM6A27HE3/2D integrates a large metal heatsink terminal (anode) that provides a low-resistance thermal path to PCB copper. Its RθJM = 0.45 °C/W enables efficient heat transfer directly to internal or external copper planes - over 100× better than standard DO-214AC packages. This allows the SM6A27HE3/2D to sustain 4600 W surges without exceeding TJ = 175 °C when properly mounted, making it uniquely suited for under-hood automotive applications.
Does the SM6A27HE3/2D meet ISO7637-2 Pulse 5a and 5b requirements?
Yes - the SM6A27HE3/2D is explicitly stated in its Vishay datasheet to meet ISO7637-2 surge specification, covering both Pulse 5a (slow decay, high energy) and Pulse 5b (fast decay, high peak) load dump waveforms. Its 4600 W (10/1000 μs) and 3600 W (10/10,000 μs) ratings align directly with the energy demands of these standardized automotive tests. The SM6A27HE3/2D achieves this compliance while maintaining ≤40.0 V clamping voltage and AEC-Q101 qualification.
SM6A27HE3/2D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
SM6A27HE3/2D FAQ
1.How can I place an order for SM6A27HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6A27HE3/2D 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 SM6A27HE3/2D reliable?
The price and inventory of SM6A27HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6A27HE3/2D is usually 5 days.
3.What payment methods are accepted for SM6A27HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6A27HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6A27HE3/2D?
SM6A27HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6A27HE3/2D 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 SM6A27HE3/2D?
For technical support, including SM6A27HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6A27HE3/2D requirements.
6.How does Aetrix verify that SM6A27HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM6A27HE3/2D 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 SM6A27HE3/2D meets industry standards.
7.What is the process for return or replacement of SM6A27HE3/2D?
All SM6A27HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6A27HE3/2D, 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 SM6A27HE3/2D part is unused and in its original packaging.
Return procedure for SM6A27HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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