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Vishay General Semiconductor - Diodes Division SM5S17AHM3/I
- Part No.:
- SM5S17AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S17AHM3/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,743
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Product details
Overview
SM5S17AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 17 V standoff voltage (VWM), 19.9 V nominal breakdown voltage (VBR), 3600 W peak pulse power (10/1000 μs), and 175 °C junction temperature. It delivers automotive-grade surge protection for load dump events in 12 V battery systems.
For engineers reviewing the SM5S17AHM3/I datasheet, SM5S17AHM3/I pinout, SM5S17AHM3/I application, or SM5S17AHM3/I equivalent, key selection criteria include AEC-Q101 qualification, unidirectional polarity with anode-heatsink configuration, low leakage (<10 μA at VWM), and ISO7637-2 compliance for automotive transients.
Technical Context
This device uses passivated anisotropic rectifier technology to achieve stable clamping under high-temperature operation up to TJ = 175 °C. Its DO-218AB package integrates a metal heatsink as the anode terminal, enabling efficient thermal dissipation with RθJM = 0.45 °C/W.
The SM5S17AHM3/I exhibits a typical VBR temperature coefficient of +0.082 %/°C and maintains ≤2.0 V forward voltage at 100 A (300 μs pulse). It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing with HE3 suffix construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines system-level DC bus tolerance margin. |
| VBR (min/typ/max) | 18.9 / 19.9 / 20.9 V at 5 mA - Precise breakdown threshold ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 27.6 V - Clamping voltage at 130 A peak pulse current; limits downstream IC stress during 10/1000 μs surges. |
| PPPM (10/1000 μs) | 3600 W - Sustains high-energy automotive load dump pulses without failure; enables compact board-level protection. |
| TJ max. | 175 °C - Enables placement near hot components (e.g., powertrain ECUs) without derating concerns in under-hood environments. |
| ID @ VWM | <10 μA at 25 °C - Minimizes standby power loss and avoids false triggering in low-power sensor circuits. |
| IFSM | 500 A - Withstands repetitive 8.3 ms half-sine surge currents common in alternator switching events. |
Pinout & Package
Package: DO-218AB - Surface-mount case with integrated metal heatsink acting as anode terminal; RoHS-compliant, matte tin-plated leads; UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Positive input / thermal path | Electrically connected to metal base; must be soldered to large copper pour for thermal management and circuit return. |
| Cathode (Lead 1) | Clamped output / surge sink | Connected to protected line (e.g., battery rail); conducts transient energy into anode/heatsink during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, HAST, and UHST. |
| Junction passivation | Optimized die surface treatment prevents moisture-induced degradation and ensures long-term reliability in humid environments. |
| ISO7637-2 compliance | Passes Pulse 5a (load dump) testing up to 35 V, 100 ms duration with 1 Ω source impedance - meets OEM requirements. |
| MSL Level 1 | Rated for reflow peak temperatures up to 245 °C without popcorn effect; supports standard SMT assembly processes. |
| Low VF at high IF | ≤2.0 V forward drop at 100 A (300 μs pulse) minimizes conduction loss during sustained overcurrent conditions. |
Applications
| Automotive Body Control Module (BCM) | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects microcontroller power rails from load dump transients generated by alternator field coil de-energization during ignition-off events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery feed and LDO input; clamps within nanoseconds to limit voltage to safe levels. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V regulators and MCU I/Os exposed to >30 V spikes lasting up to 400 ms. |
Use Scenario: Shields high-side driver ICs and CAN transceivers from coupled transients during starter motor engagement and relay switching. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on main 12 V supply rail upstream of DC/DC converters and gate drivers. Use Value: Maintains functional safety integrity by limiting rail voltage to ≤27.6 V during 3600 W pulses, preserving ASIL-B system operation. |
| ADAS Camera Power Supply | Infotainment Head Unit Battery Interface |
Use Scenario: Guards image sensor and ISP power inputs against ESD and load dump in rear-view and surround-view camera modules mounted near chassis ground. IC Role / Device Role / Timing Role: Fast-response TVS placed directly at connector entry point; anode tied to chassis via heatsink pad. Use Value: Achieves <1 ns response time and withstands repeated 10/1000 μs surges without parameter drift, ensuring consistent video quality. |
Use Scenario: Secures USB-C PD controller and audio codec power domains against battery disconnection/reconnection transients in center-stack displays. IC Role / Device Role / Timing Role: Standoff-rated protector on VBAT line; coordinates with secondary TVS and ceramic capacitors for multi-stage filtering. Use Value: Enables robust 12 V–5 V conversion by holding rail voltage below 28 V during worst-case 2800 W (10/10,000 μs) surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S17AHM3 | No /I suffix - bulk packaging instead of tape-and-reel; identical electrical specs and AEC-Q101 qualification. | Suitable for manual prototyping or low-volume assembly where reel feeding is unnecessary. | Select SM5S17AHM3/I for automated SMT lines requiring 750-unit 13″ reels with anode orientation toward sprocket hole. |
| SM5S18AHM3/I | Higher VWM (18 V) and VBR (20.0–22.1 V); same DO-218AB package and 3600 W rating. | Better margin for 12 V systems with elevated nominal voltage (e.g., start-stop battery regulation at 13.8 V). | Choose SM5S18AHM3/I if system VWM exceeds 17 V or requires tighter clamping headroom above regulated rail. |
Compared with SM5S17AHM3/I, SM5S17AHM3 offers identical protection performance in non-automated builds, while SM5S18AHM3/I provides higher standoff for systems with elevated battery voltage tolerances - both retain full AEC-Q101 qualification and DO-218AB thermal performance.
Availability
SM5S17AHM3/I is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, and ADAS camera power supplies requiring stable component supply with AEC-Q101 assurance and high-temperature reliability.
Supply support for SM5S17AHM3/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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and TVS devices, with emphasis on high-reliability, automotive-qualified components.
The SM5S series targets automotive load dump protection with PAR® technology, optimized for DO-218AB thermal performance and AEC-Q101 compliance in under-hood power systems.
FAQ
What is the maximum clamping voltage of the SM5S17AHM3/I under a 10/1000 μs surge?
The SM5S17AHM3/I has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current of 130 A using the 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88382, page 2) and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the SM5S17AHM3/I qualified for automotive applications?
Yes, the SM5S17AHM3/I is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 load dump requirements, operates up to 175 °C junction temperature, and carries the HE3 suffix confirming JESD201 Class 2 whisker resistance and RoHS compliance - all verified in Vishay's official qualification report.
What does the "/I" suffix indicate in SM5S17AHM3/I?
The "/I" suffix in SM5S17AHM3/I denotes tape-and-reel packaging per JEDEC standard: 750 units per 13″ diameter reel, with anode terminal oriented toward the sprocket hole. This format is optimized for automated pick-and-place assembly and differs from the bulk-packaged SM5S17AHM3 variant.
How is thermal management implemented in the SM5S17AHM3/I package?
The SM5S17AHM3/I uses a DO-218AB package where the metal heatsink serves as the anode terminal and primary thermal path. With RθJM = 0.45 °C/W, effective heat transfer requires soldering the heatsink to a ≥100 mm² copper pad connected to internal ground planes - as specified in Vishay's thermal design guidelines (Document 88382, page 5).
Does the SM5S17AHM3/I meet moisture sensitivity level requirements for lead-free reflow?
Yes, the SM5S17AHM3/I is rated MSL Level 1 per J-STD-020, allowing unlimited floor life and compatibility with lead-free reflow profiles peaking at 245 °C. This rating is confirmed in the "Mechanical Data" section of the Vishay datasheet (Document 88382, page 1) and validated through preconditioning tests.
SM5S17AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 130A
- Power - Peak Pulse:
- 3600W (3.6kW)
- 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-218AC
SM5S17AHM3/I FAQ
1.How can I place an order for SM5S17AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S17AHM3/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 SM5S17AHM3/I reliable?
The price and inventory of SM5S17AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S17AHM3/I is usually 5 days.
3.What payment methods are accepted for SM5S17AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S17AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S17AHM3/I?
SM5S17AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S17AHM3/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 SM5S17AHM3/I?
For technical support, including SM5S17AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S17AHM3/I requirements.
6.How does Aetrix verify that SM5S17AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM5S17AHM3/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 SM5S17AHM3/I meets industry standards.
7.What is the process for return or replacement of SM5S17AHM3/I?
All SM5S17AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S17AHM3/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 SM5S17AHM3/I part is unused and in its original packaging.
Return procedure for SM5S17AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S17AHM3/I Tags
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