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Vishay General Semiconductor - Diodes Division SM5S14AHM3/I
- Part No.:
- SM5S14AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S14AHM3/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,557
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Product details
Overview
SM5S14AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 14 V stand-off voltage (VWM), 16.4 V nominal breakdown voltage (VBR), 3600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive load dump protection.
For engineers reviewing the SM5S14AHM3/I datasheet, SM5S14AHM3/I pinout, SM5S14AHM3/I application, or SM5S14AHM3/I equivalent, this page delivers verified electrical parameters, thermal performance at TJ = 175 °C, ISO7637-2 compliance context, and direct alternative part guidance for legacy design continuity.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for high-temperature stability. It operates across -55 °C to +175 °C and exhibits low leakage (≤10 μA at VWM) and low forward voltage drop (≤2.0 V at 100 A).
The device delivers 150 A peak pulse current (10/1000 μs) with 23.2 V clamping voltage (VC) and supports MSL level 1 reflow (245 °C peak). Its DO-218AB package features a metal heatsink anode configuration and UL 94 V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14.0 V - maximum continuous reverse operating voltage before conduction begins |
| VBR (nom) | 16.4 V at 5 mA - precise breakdown threshold enabling accurate overvoltage triggering |
| VC @ IPPM | 23.2 V at 150 A - clamping voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM (10/1000 μs) | 3600 W - surge energy handling capacity for automotive load dump transients |
| TJ max | +175 °C - extended junction temperature rating supporting under-hood automotive placement |
| ID @ VWM | ≤10 μA - ultra-low leakage preserves system standby power integrity |
| RθJM | 0.45 °C/W - low junction-to-mount thermal resistance enables efficient heat transfer to PCB heatsink |
Pinout & Package
Package: DO-218AB - surface-mount, anode-connected metal heatsink case with matte tin-plated terminals, UL 94 V-0 compliant molding compound, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Current entry point during clamping | Integrated metal base serves as primary thermal path and electrical anode connection; must be soldered to large copper area |
| Cathode (Lead 1) | Current exit point during clamping | Standard signal-side terminal; connects to protected line; polarity-sensitive installation required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control units and body modules |
| ISO7637-2 compliance | Meets automotive transient immunity requirements for load dump (Pulse 5a/b) and switching surges |
| Junction passivation | Enhanced long-term stability under thermal cycling and humidity exposure in harsh environments |
| MSL Level 1 rating | Supports standard SMT reflow without moisture sensitivity concerns (245 °C peak) |
| Low RθJM (0.45 °C/W) | Enables >80 % of surge power dissipation through heatsink interface rather than ambient convection |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: 12 V battery system subjected to alternator load dump transients up to 40 V for 400 ms. IC Role / Device Role / Timing Role: Primary clamping device on main power rail upstream of DC/DC converters and microcontrollers. Use Value: Limits voltage to ≤23.2 V during 3600 W surge, preventing damage to 28 V-rated regulators and logic ICs. |
Use Scenario: ECU exposed to inductive switching noise from fuel injectors and solenoids. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at power entry point before bulk capacitance. Use Value: Clamps sub-100 ns spikes with <2.0 V forward drop, preserving low-noise supply integrity for analog sensors and CAN transceivers. |
| Body Control Module (BCM) Power Rail | ADAS Camera Power Interface |
Use Scenario: BCM managing door locks, lighting, and HVAC with multiple switched inductive loads. IC Role / Device Role / Timing Role: Unidirectional TVS protecting 12 V input against repetitive switching transients. Use Value: Sustains ≤10 μA leakage at 14 V to avoid battery drain while delivering 150 A peak pulse capability. |
Use Scenario: Front-facing camera module powered directly from vehicle battery with minimal filtering. IC Role / Device Role / Timing Role: First-line defense against jump-start and load dump events per ISO16750-2. Use Value: Operates reliably at TJ = 175 °C, enabling placement near heat-generating image processors without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S14AHM3 | No /I suffix - same electrical specs but non-tape-and-reel packaging; lacks anode orientation marking per I-code | Not suitable for automated pick-and-place requiring sprocket-hole anode alignment | Select SM5S14AHM3/I when using 13" tape-and-reel feeders with anode-toward-sprocket-hole requirement |
| SM5S15AHM3/I | Higher VWM (15 V) and VBR (17.6 V nom); 24.4 V clamping voltage; identical package and surge rating | Better margin for systems with higher nominal 12 V rail tolerance (e.g., 13.5 V cold-crank) | Choose SM5S15AHM3/I if design requires ≥1 V headroom above 14 V nominal rail or tighter clamping voltage tolerance |
Compared with SM5S14AHM3/I, SM5S14AHM3 offers identical protection performance but lacks tape-and-reel traceability and anode orientation coding, while SM5S15AHM3/I shifts clamping threshold upward by 1.2 V-enabling safer operation in higher-voltage automotive subsystems without sacrificing surge robustness.
Availability
SM5S14AHM3/I is available at Aetrix Electronics and suitable for automotive load dump protection, ECU power input hardening, and BCM power rail stabilization requiring stable component supply across extended temperature and surge conditions.
Supply support for SM5S14AHM3/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 with emphasis on high-reliability, high-power, and automotive-grade components.
The SM5S series is engineered specifically for automotive transient suppression, combining AEC-Q101 qualification, DO-218AB thermal efficiency, and ISO7637-2 compliance in a single-package solution.
FAQ
What is the clamping voltage of SM5S14AHM3/I at its rated peak pulse current?
The SM5S14AHM3/I has a maximum clamping voltage (VC) of 23.2 V at 150 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions per the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during surge events. The SM5S14AHM3/I maintains this clamping performance across its full operating temperature range.
Is SM5S14AHM3/I qualified for automotive applications?
Yes, SM5S14AHM3/I is AEC-Q101 qualified and rated for operation from -55 °C to +175 °C, making it suitable for under-hood and other demanding automotive environments. It meets ISO7637-2 load dump requirements and is manufactured with RoHS-compliant, halogen-free materials per Vishay's E3 specification. The SM5S14AHM3/I also passes JESD201 Class 2 whisker testing.
What does the "/I" suffix mean in SM5S14AHM3/I?
The "/I" suffix in SM5S14AHM3/I indicates tape-and-reel packaging with anode orientation toward the sprocket hole, per Vishay's ordering convention. This ensures consistent placement during automated assembly. The base part SM5S14AHM3 is functionally identical but supplied in different packaging formats without orientation coding. Both share identical electrical and thermal specifications.
How does SM5S14AHM3/I handle thermal dissipation during repeated surges?
The SM5S14AHM3/I leverages its DO-218AB package with integrated metal heatsink anode to achieve a junction-to-mount thermal resistance (RθJM) of 0.45 °C/W. During repetitive surges, heat transfers efficiently into the PCB copper plane, minimizing junction temperature rise. Its 5 W steady-state power dissipation rating and 175 °C max junction temperature allow sustained operation where ambient temperatures exceed 125 °C.
Can SM5S14AHM3/I replace older SM5S14A variants in existing designs?
Yes, SM5S14AHM3/I is a direct replacement for legacy SM5S14A devices with enhanced qualifications: it adds AEC-Q101 certification, MSL Level 1 reflow compatibility, and improved thermal performance via the DO-218AB package. Electrical parameters-including VWM (14 V), VBR (16.4 V), and VC (23.2 V)-are identical. No PCB layout changes are needed for migration to SM5S14AHM3/I.
SM5S14AHM3/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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 155A
- 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
SM5S14AHM3/I FAQ
1.How can I place an order for SM5S14AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S14AHM3/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 SM5S14AHM3/I reliable?
The price and inventory of SM5S14AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S14AHM3/I is usually 5 days.
3.What payment methods are accepted for SM5S14AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S14AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S14AHM3/I?
SM5S14AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S14AHM3/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 SM5S14AHM3/I?
For technical support, including SM5S14AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S14AHM3/I requirements.
6.How does Aetrix verify that SM5S14AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM5S14AHM3/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 SM5S14AHM3/I meets industry standards.
7.What is the process for return or replacement of SM5S14AHM3/I?
All SM5S14AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S14AHM3/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 SM5S14AHM3/I part is unused and in its original packaging.
Return procedure for SM5S14AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S14AHM3/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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