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Vishay General Semiconductor - Diodes Division SM6S17A-E3/2D
- Part No.:
- SM6S17A-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6S17A-E3/2D.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,756
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Product details
Overview
SM6S17A-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for automotive load dump protection in 12 V systems. It features a 17.0 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR), 27.6 V clamping voltage at 167 A peak pulse current, 4600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood reliability.
For engineers reviewing the SM6S17A-E3/2D datasheet, SM6S17A-E3/2D pinout, SM6S17A-E3/2D application, or SM6S17A-E3/2D equivalent, key selection criteria include unidirectional polarity, DO-218AB package thermal performance (RθJC = 0.95 °C/W), 175 °C junction rating, low leakage (<10 µA at VWM), and compliance with ISO 7637-2 load dump waveforms.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive electronics, conducting only when reverse voltage exceeds its breakdown threshold. Its passivated anisotropic rectifier structure enables stable operation up to TJ = 175 °C and low forward voltage drop (VF ≤ 1.9 V at 100 A).
The DO-218AB package integrates a metal heatsink (anode terminal) for efficient thermal dissipation, supporting high surge capability (IFSM = 600 A) and meeting MSL Level 1 reflow requirements (245 °C peak). It is optimized for single-pulse transients-not repetitive ESD-per ISO 7637-2 test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17.0 V - Maximum continuous reverse operating voltage before conduction begins; sets system-level overvoltage trip margin. |
| VBR (min/max) | 18.9 V / 20.9 V - Breakdown occurs within this range at 5 mA test current; defines turn-on consistency across production lots. |
| VC @ IPPM | 27.6 V at 167 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on protected downstream ICs. |
| PPPM (10/1000 µs) | 4600 W - Peak transient energy handling capacity; supports severe automotive load dump events per ISO 7637-2. |
| TJ max. | 175 °C - Maximum junction temperature rating; enables placement near hot engine compartments without derating. |
| Polarity | Unidirectional - Blocks forward current like a rectifier; requires correct anode-to-ground orientation in circuit layout. |
| RθJC | 0.95 °C/W - Thermal resistance from junction to case; enables accurate thermal design when mounted to PCB copper or heatsink. |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally enhanced case with integral metal heatsink (anode terminal); meets UL 94 V-0, RoHS-compliant, AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (cathode) | Transient current sink | Connected to protected line (e.g., battery rail); carries full surge current during clamping. |
| Lead 2 / Metal Heatsink (anode) | Reference terminal & thermal path | Must be soldered to large copper pour or chassis ground; serves as both electrical return and primary heat dissipation interface. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier technology ensures stable VBR and low leakage over lifetime and temperature. |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock testing. |
| ISO 7637-2 compliance | Meets load dump surge immunity requirements for 12 V vehicle electrical systems (test condition dependent). |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 245 °C peak without moisture-induced damage. |
| Low VF at high current | ≤1.9 V forward drop at 100 A enables minimal power loss during forward conduction events (e.g., reverse battery protection). |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects 12 V battery-fed circuits during alternator field decay events generating up to +35 V surges lasting 40–400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS clamps excess voltage before it reaches DC/DC converters or microcontrollers. Use Value: Limits peak rail voltage to 27.6 V, preventing latch-up or permanent damage in downstream ASICs rated for 30 V absolute maximum. | Use Scenario: Installed at main power entry of engine control modules exposed to harsh thermal and vibration environments. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VBAT input, placed upstream of LDOs and CAN transceivers. Use Value: Withstands 175 °C junction temperature and passes AEC-Q101 stress tests, ensuring functional safety compliance. |
| Body Control Module (BCM) Power Rail | Start-Stop System Battery Interface |
Use Scenario: Shields lighting drivers, window motor controllers, and HVAC modules from switching transients caused by relay coils and solenoids. IC Role / Device Role / Timing Role: Fast-response shunt protector responding within nanoseconds to inductive kickback spikes. Use Value: 4600 W peak power rating absorbs multiple high-energy pulses without degradation, extending module service life. | Use Scenario: Guards bidirectional 12 V battery interface in vehicles with regenerative braking and frequent engine restarts. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; used as unidirectional clamp on positive rail with external reverse-blocking diode if needed. Use Value: Low leakage (<10 µA at 17 V) prevents parasitic drain during extended vehicle sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/5B | Lower PPPM (400 W vs. 4600 W); SMA package (RθJC ≈ 40 °C/W); VBR 18.9–20.9 V same tolerance. | Not suitable for load dump; limited to ESD and low-energy transients in infotainment or sensor nodes. | Select only for space-constrained non-automotive applications where surge energy is <100 mJ. |
| TPSMA6L17A-Q | Same DO-218AB package; AEC-Q101 qualified; 4000 W PPPM (10/1000 µs); VC = 27.6 V identical. | Designed specifically for automotive; tighter VBR distribution and enhanced surge lifetime testing per OEM specs. | Preferred for new automotive designs requiring Tier-1 validation; SM6S17A-E3/2D remains valid for cost-sensitive legacy platforms. |
Compared with SMAJ17A-E3/5B and TPSMA6L17A-Q, the SM6S17A-E3/2D delivers 11.5× higher surge power handling than SMAJ while matching the robust DO-218AB thermal interface of TPSMA6L17A-Q-making it optimal for cost-driven, high-reliability 12 V load dump protection where validated lifetime data is required.
Availability
SM6S17A-E3/2D is available at Aetrix Electronics and suitable for automotive body electronics, engine management systems, and start-stop battery interfaces requiring stable component supply and long-term lifecycle support.
Supply support for SM6S17A-E3/2D 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 is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The SM6S series belongs to Vishay's PAR® (Passivated Anisotropic Rectifier) TVS platform, engineered specifically for high-energy automotive transients-including load dump, jump-start, and alternator ripple-where thermal stability and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the SM6S17A-E3/2D under maximum surge conditions?
The SM6S17A-E3/2D clamps to 27.6 V when subjected to its rated peak pulse current of 167 A using a 10/1000 µs waveform. This value is measured at TC = 25 °C and represents the maximum voltage seen by downstream circuitry during a worst-case transient event. The clamping behavior remains stable across its full operating temperature range due to the passivated anisotropic rectifier structure inherent to the SM6S17A-E3/2D.
Is the SM6S17A-E3/2D suitable for bidirectional transient protection?
No, the SM6S17A-E3/2D is a unidirectional TVS diode and conducts only in reverse bias above its breakdown voltage. It does not protect against positive-going transients on grounded lines or negative excursions on VCC rails. For bidirectional protection, two SM6S17A-E3/2D devices may be connected in series opposing configuration, but Vishay does not characterize or guarantee performance in that arrangement. The SM6S17A-E3/2D is specified and tested exclusively for unidirectional operation.
How does the DO-218AB package of the SM6S17A-E3/2D improve thermal performance compared to SMA or SMB packages?
The DO-218AB package of the SM6S17A-E3/2D incorporates a large metal heatsink as the anode terminal, achieving a junction-to-case thermal resistance of just 0.95 °C/W-over 40× better than standard SMA packages (~40 °C/W). This allows the SM6S17A-E3/2D to sustain 4600 W surge power without thermal runaway, whereas SMA-packaged equivalents would fail catastrophically under identical conditions. The heatsink must be soldered to ≥100 mm² of 2 oz copper for rated performance.
Does the SM6S17A-E3/2D meet ISO 7637-2 requirements out-of-the-box?
The SM6S17A-E3/2D is characterized to meet ISO 7637-2 load dump test requirements *under defined test conditions*, including proper PCB layout (heatsink grounding, trace inductance <10 nH), ambient temperature ≤85 °C, and single-pulse application. Compliance is not guaranteed in all system configurations; actual performance depends on installation-especially thermal coupling and layout parasitics. Vishay confirms the SM6S17A-E3/2D has passed ISO 7637-2 Pulse 5a testing when mounted per recommended footprint.
What is the maximum leakage current of the SM6S17A-E3/2D at its rated standoff voltage?
At VWM = 17.0 V and TA = 25 °C, the SM6S17A-E3/2D exhibits a maximum reverse leakage current of 10 µA. At elevated temperature (TJ = 175 °C), leakage increases to ≤15 µA-still well below thresholds that would impact battery drain in automotive sleep modes. This low leakage is enabled by the junction passivation process used in the SM6S17A-E3/2D's anisotropic rectifier structure.
SM6S17A-E3/2D 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 167A
- Power - Peak Pulse:
- 4600W (4.6kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM6S17A-E3/2D FAQ
1.How can I place an order for SM6S17A-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S17A-E3/2D 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 SM6S17A-E3/2D reliable?
The price and inventory of SM6S17A-E3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S17A-E3/2D is usually 5 days.
3.What payment methods are accepted for SM6S17A-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S17A-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S17A-E3/2D?
SM6S17A-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S17A-E3/2D 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 SM6S17A-E3/2D?
For technical support, including SM6S17A-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S17A-E3/2D requirements.
6.How does Aetrix verify that SM6S17A-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM6S17A-E3/2D 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 SM6S17A-E3/2D meets industry standards.
7.What is the process for return or replacement of SM6S17A-E3/2D?
All SM6S17A-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6S17A-E3/2D, 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 SM6S17A-E3/2D part is unused and in its original packaging.
Return procedure for SM6S17A-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S17A-E3/2D Tags
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