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Vishay General Semiconductor - Diodes Division SM5S16AHM3/I
- Part No.:
- SM5S16AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S16AHM3/I.pdf
- Description:
- TVS DIODE 16VWM 26VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,598
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Product details
Overview
SM5S16AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 16 V stand-off voltage (VWM), 17.8–19.7 V breakdown (VBR at 5 mA), 3600 W peak pulse power (10/1000 μs), and 175 °C junction temperature - designed for automotive load dump protection in engine control units and body electronics.
For engineers reviewing the SM5S16AHM3/I datasheet, SM5S16AHM3/I pinout, SM5S16AHM3/I application, or SM5S16AHM3/I equivalent, key selection criteria include AEC-Q101 qualification, unidirectional polarity with heatsink-as-anode configuration, low leakage (<10 μA at VWM), and ISO7637-2 compliance for harsh automotive transients.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under high-temperature operation up to TJ = 175 °C, with thermal resistance RθJM = 0.45 °C/W enabling effective heat transfer to the metal heatsink terminal. Its unidirectional architecture provides low forward voltage drop (VF ≤ 2.0 V at 100 A) and high surge capability (IFSM = 500 A).
The device meets MSL Level 1 per J-STD-020 (peak reflow 245 °C), features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is RoHS-compliant with HE3 suffix meeting JESD 201 Class 2 whisker test requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - maximum continuous reverse operating voltage before conduction begins; sets system-level overvoltage trip threshold. |
| VBR (min/typ/max) | 17.8 / 18.8 / 19.7 V at 5 mA - precise breakdown range ensures predictable clamping onset across production lots. |
| VC @ IPPM | 26.0 V - clamping voltage during 3600 W transient; defines worst-case voltage seen by protected ICs. |
| PPPM (10/1000 μs) | 3600 W - peak surge power handling capacity; supports severe automotive load dump events per ISO7637-2. |
| TJ max. | 175 °C - enables reliable operation in under-hood environments without derating in most mounting configurations. |
| ID @ VWM | <10 μA - ultra-low leakage preserves battery life in always-on automotive modules. |
| Package | DO-218AB - thermally optimized surface-mount case with integral metal heatsink terminal for direct PCB thermal path. |
Pinout & Package
DO-218AB package features two terminals: Lead 1 (cathode) and Lead 2/metal heatsink (anode). The heatsink serves as the anode connection and provides primary thermal dissipation path to the PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit node; carries transient current into device during clamping event. |
| Lead 2 / Metal Heatsink | Anode | Serves as both electrical anode connection and primary thermal interface; must be soldered to large copper pour for RθJM = 0.45 °C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Junction passivation | Optimized die surface treatment prevents moisture-induced degradation and improves long-term stability at 175 °C. |
| ISO7637-2 compliance | Withstands defined load dump waveforms (e.g., Pulse 5a) without parametric shift or failure when properly mounted. |
| MSL Level 1 rating | Allows single-pass reflow at 245 °C peak without popcorn or delamination risk - eliminates pre-bake requirement. |
| Heatsink-as-anode design | Enables low-inductance, low-resistance anode connection while maximizing thermal coupling to PCB ground plane. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: Protects 12 V supply rail of engine control unit against alternator load dump transients exceeding 35 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive-going surges on main power input, diverting >300 A peak current away from downstream DC/DC converters and microcontrollers. Use Value: Maintains system uptime during cold-cranking and load dump events per ISO7637-2 Pulse 5a, preventing reset or latch-up of safety-critical MCU. |
Use Scenario: Shields CAN transceiver I/O lines from coupled transients induced by nearby high-current solenoid switching. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp placed between CAN_H/CAN_L and chassis ground, suppressing common-mode spikes without distorting signal integrity. Use Value: Enables robust communication during vehicle assembly line ESD events and service shop grounding faults while maintaining <100 ps response time. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Rail | Electric Power Steering (EPS) Motor Driver Stage |
Use Scenario: Guards 5 V or 3.3 V imaging sensor power supply in front-facing ADAS camera exposed to under-hood EMI and ignition noise. IC Role / Device Role / Timing Role: Secondary TVS stage following primary bulk suppression, providing fine-clamp protection with VC = 26.0 V to prevent overvoltage damage to low-voltage image signal chain. Use Value: Ensures pixel-level accuracy and avoids frame corruption during repeated short-duration transients typical in start-stop systems. |
Use Scenario: Protects gate drivers and high-side MOSFETs in EPS motor control inverter from inductive kickback during rapid PWM switching. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor placed across motor phase outputs, absorbing energy from Ldi/dt spikes before reaching driver ICs. Use Value: Extends MOSFET lifetime by limiting VDS overshoot to ≤26.0 V, reducing avalanche stress and cumulative wear in 100% duty-cycle steering assist conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S16AHM3 | No /I suffix - same electrical specs but supplied in standard tape-and-reel (750 pcs/reel); lacks I-grade traceability and extended test screening. | Acceptable for non-safety-critical industrial designs where full automotive traceability is not mandated. | Select SM5S16AHM3/I when full lot-level traceability, AEC-Q101 documentation, and I-grade packaging (anode orientation marked) are required for OEM audits. |
| SM5S18AHM3/I | Higher VWM (18 V) and VBR (20.0–22.1 V); identical package, thermal, and surge ratings. | Better suited for 16–18 V nominal systems (e.g., dual-battery trucks) where 16 V VWM would cause premature conduction during normal regulation ripple. | Choose SM5S18AHM3/I if system nominal voltage exceeds 14.5 V or if margin against VWM tolerance drift at high temperature is critical. |
Compared with SM5S16AHM3/I, the SM5S16AHM3 offers cost savings without electrical compromise in non-traceable builds, while SM5S18AHM3/I provides higher voltage headroom for wider input rails - both retain DO-218AB thermal performance and AEC-Q101 qualification.
Availability
SM5S16AHM3/I is available at Aetrix Electronics and suitable for automotive ECU power protection, body electronics surge suppression, and ADAS camera rail stabilization requiring stable component supply across multi-year production cycles.
Supply support for SM5S16AHM3/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SM5S series is part of Vishay's PAR® TVS platform engineered specifically for AEC-Q101-compliant automotive load dump and inductive switching protection, emphasizing thermal robustness and repeatable clamping performance at 175 °C.
FAQ
What does the "/I" suffix mean in SM5S16AHM3/I?
The "/I" suffix in SM5S16AHM3/I denotes Vishay's I-grade packaging option: it specifies anode-toward-sprocket-hole orientation in 13" tape-and-reel delivery (750 pcs/reel) and includes full lot-level traceability documentation required by Tier 1 automotive OEMs. This grade ensures consistent mechanical placement and audit-ready material history for SM5S16AHM3/I builds.
Is SM5S16AHM3/I suitable for bidirectional transient protection?
No - SM5S16AHM3/I is unidirectional only, with polarity defined as cathode on Lead 1 and anode on the metal heatsink (Lead 2). It suppresses positive transients on the cathode side relative to anode. For bidirectional protection, a separate TVS pair or a dedicated bidirectional device such as SMAJ16A must be used; SM5S16AHM3/I does not conduct in reverse bias beyond its specified leakage.
How does SM5S16AHM3/I meet ISO7637-2 compliance?
SM5S16AHM3/I meets ISO7637-2 Pulse 5a (load dump) requirements when mounted per Vishay's recommended footprint and thermal layout: the metal heatsink must be soldered to ≥250 mm² of 2 oz. copper, achieving RθJM = 0.45 °C/W. Under these conditions, it clamps 3600 W transients to ≤26.0 V without degradation, satisfying the standard's voltage-limit and survivability criteria.
What is the thermal resistance from junction to ambient (RθJA) for SM5S16AHM3/I?
The typical RθJA for SM5S16AHM3/I is 55 °C/W when mounted on a standard FR4 PCB with 2 oz. copper per JEDEC 51-2A. However, this value assumes minimal copper area; actual RθJA drops significantly with larger heatsink pads. For thermal design, RθJM = 0.45 °C/W (junction-to-mount) is the more relevant parameter, as it reflects performance when the metal heatsink is properly coupled to PCB copper.
Can SM5S16AHM3/I replace older SM5S16A devices in existing designs?
Yes - SM5S16AHM3/I is a direct replacement for SM5S16A, with identical electrical specifications, DO-218AB package dimensions, and pinout. The "HM3" suffix indicates AEC-Q101 qualification and RoHS-compliant HE3 termination; the "/I" adds traceable packaging. No PCB or schematic changes are needed, and SM5S16AHM3/I improves reliability in automotive environments versus legacy SM5S16A.
SM5S16AHM3/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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 138A
- 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
SM5S16AHM3/I FAQ
1.How can I place an order for SM5S16AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S16AHM3/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 SM5S16AHM3/I reliable?
The price and inventory of SM5S16AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S16AHM3/I is usually 5 days.
3.What payment methods are accepted for SM5S16AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S16AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S16AHM3/I?
SM5S16AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S16AHM3/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 SM5S16AHM3/I?
For technical support, including SM5S16AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S16AHM3/I requirements.
6.How does Aetrix verify that SM5S16AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM5S16AHM3/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 SM5S16AHM3/I meets industry standards.
7.What is the process for return or replacement of SM5S16AHM3/I?
All SM5S16AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S16AHM3/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 SM5S16AHM3/I part is unused and in its original packaging.
Return procedure for SM5S16AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S16AHM3/I Tags
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