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Vishay General Semiconductor - Diodes Division SM5S54CAHM3/I
- Part No.:
- SM5S54CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S54CAHM3/I.pdf
- Description:
- 3600 W BI-DIRECTIONAL TVS IS DO-
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SM5S54CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in 12 V/24 V systems. It features a 60.0–66.3 V breakdown voltage (VBR), 54.0 V stand-off voltage (VWM), 87.1 V maximum clamping voltage (VC) at 41.3 A peak pulse current, and 3600 W peak pulse power (10/1000 µs). It is AEC-Q101 qualified and rated for TJ = 175 °C operation.
For engineers reviewing the SM5S54CAHM3/I datasheet, SM5S54CAHM3/I pinout, SM5S54CAHM3/I application, or SM5S54CAHM3/I equivalent, this device is selected for high-reliability automotive electronics requiring ISO 7637-2 and ISO 16750-2 surge compliance, low leakage (<10 µA at VWM), and DO-218AC package thermal performance with RθJM = 0.45 °C/W.
Technical Context
The SM5S54CAHM3/I operates as a silicon avalanche diode configured in a bidirectional topology, enabling symmetrical clamping of positive and negative transients without polarity marking. Its junction passivation ensures stable leakage behavior up to 175 °C, and its DO-218AC case provides direct metal heatsink contact via the cathode-side tab for low thermal resistance.
It delivers 3600 W peak pulse power under 10/1000 µs waveform conditions and maintains 2400 W under extended 10/10,000 µs surges - critical for sustained load-dump events. The device meets MSL Level 1 per J-STD-020 and passes JESD 201 Class 2 whisker testing, confirming robustness in automated assembly and harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 60.0 / 63.2 / 66.3 V - defines minimum voltage at which avalanche conduction begins reliably at 5 mA test current |
| VWM | 54.0 V - maximum continuous reverse operating voltage before significant leakage onset |
| VC @ IPPM | 87.1 V at 41.3 A - clamping voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM (10/1000 µs) | 3600 W - peak transient energy absorption capability without failure |
| TJ max. | 175 °C - enables placement near hot engine-control units without derating penalties |
| RθJM | 0.45 °C/W - thermal resistance from junction to metal heatsink, enabling efficient heat transfer through DO-218AC tab |
| ID @ VWM | <10 µA at 25 °C - ensures minimal standby power loss in always-on vehicle modules |
Pinout & Package
SM5S54CAHM3/I uses the DO-218AC surface-mount package: a molded, halogen-free, RoHS-compliant case with a metal heatsink tab (cathode-side terminal) and two solderable matte tin-plated leads. Polarity is bidirectional; no cathode band is marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode | Standard anode connection; oriented toward sprocket hole in 13″ tape-and-reel delivery |
| Lead 2 / Metal Heatsink Tab | Cathode / Thermal Path | Provides low-inductance cathode connection and primary thermal conduction path to PCB copper pour or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive powertrain and body electronics under temperature cycling, humidity, and mechanical shock stress |
| DO-218AC metal tab | Enables direct thermal coupling to PCB ground plane or external heatsink, reducing junction temperature rise by >40 % vs. standard SOD packages |
| ISO 7637-2 & ISO 16750-2 compliance | Guarantees survivability against standardized automotive load-dump (Pulse 5a/b) and supply transient waveforms |
| MSL Level 1 rating | Supports lead-free reflow up to 245 °C peak without popcorn or delamination risk |
| Bidirectional symmetry | Eliminates orientation sensitivity during placement and protects against both positive and negative polarity transients equally |
Applications
| Engine Control Unit (ECU) Protection | Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting microcontroller I/O and power rails from alternator load-dump spikes during battery disconnect events. IC Role / Device Role / Timing Role: Primary clamping element on 12 V main supply rail upstream of DC/DC converters and LDOs. Use Value: Limits rail voltage to ≤87.1 V during 3600 W transients, preventing latch-up or oxide breakdown in downstream 5 V/3.3 V logic. |
Use Scenario: Safeguarding LIN bus transceivers and window motor drivers from switching noise and ESD-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed across VCC-GND pins of LIN transceivers and H-bridge gate drivers. Use Value: Sub-10 µA leakage at 54 V ensures no impact on sleep-mode current budgets; 175 °C rating supports under-hood mounting. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Input | Electric Power Steering (EPS) Motor Controller |
Use Scenario: Securing 12 V input to image sensor SoCs and ISP processors exposed to ignition transients and RF-coupled noise. IC Role / Device Role / Timing Role: First-line transient suppressor on camera module power entry, before filtering and regulation stages. Use Value: 87.1 V clamping prevents pixel corruption or reset events during ISO 16750-2 Pulse 4a (slow ramp) events. |
Use Scenario: Shielding MCU and gate driver supplies from inductive kickback generated by EPS motor commutation. IC Role / Device Role / Timing Role: High-power TVS mounted directly on motor controller PCB near H-bridge power stage. Use Value: 0.45 °C/W RθJM allows sustained 2400 W (10/10,000 µs) dissipation without exceeding 175 °C junction limit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54CA | DO-214AC (SMA) package; higher RθJA = 95 °C/W; 2000 W PPPM (10/1000 µs); VC = 87.1 V same | Limited to lower-power modules due to thermal constraints; not AEC-Q101 qualified | Select SMAJ54CA only for cost-sensitive non-automotive industrial controls where 175 °C operation and ISO compliance are not required. |
| TPSMD54CA | DO-218AC package; identical footprint; 3600 W PPPM; VC = 87.1 V; but VBR = 58.9–64.9 V (tighter tolerance) | Same automotive use cases; slightly lower VBR may trigger earlier during marginal overvoltage | TPSMD54CA is a functional alternative with tighter breakdown tolerance, suitable when earlier clamping onset is preferred without changing layout. |
Compared with SM5S54CAHM3/I, SMAJ54CA offers lower cost but sacrifices AEC-Q101 qualification, thermal performance, and surge rating; TPSMD54CA matches package and power rating while offering tighter VBR tolerance - making it a drop-in alternative only if earlier clamping threshold is acceptable.
Availability
SM5S54CAHM3/I is available at Aetrix Electronics and suitable for automotive ECU protection, body control modules, ADAS camera power inputs, and electric power steering motor controllers requiring stable component supply across long production lifecycles.
Supply support for SM5S54CAHM3/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 SM5SxxCA family is engineered specifically for automotive-grade transient suppression, combining AEC-Q101 qualification, high-temperature stability, and DO-218AC thermal efficiency to meet stringent ISO 7637-2 and ISO 16750-2 requirements.
FAQ
What is the clamping voltage of SM5S54CAHM3/I at its rated peak pulse current?
The SM5S54CAHM3/I has a maximum clamping voltage (VC) of 87.1 V at its specified peak pulse current (IPPM) of 41.3 A under the 10/1000 µs waveform. This value is measured per Figure 4 in the Vishay datasheet and represents the upper voltage limit imposed on protected circuits during worst-case surge events. Maintaining VC below 90 V ensures compatibility with 5 V and 12 V automotive ICs rated for 100 V absolute maximum.
Is SM5S54CAHM3/I suitable for use in under-hood automotive applications?
Yes, SM5S54CAHM3/I is explicitly qualified for under-hood use: it carries AEC-Q101 certification, operates up to TJ = 175 °C, and meets ISO 7637-2 Pulse 5a/b load-dump requirements. Its DO-218AC package provides direct metal heatsink contact, and its RθJM of 0.45 °C/W enables effective thermal management even in ambient temperatures exceeding 125 °C - a key requirement for engine compartment placements.
Does SM5S54CAHM3/I have polarity markings, and how is it mounted?
No, SM5S54CAHM3/I is bidirectional and has no cathode band or polarity marking. It is mounted in the DO-218AC package with Lead 1 (anode) oriented toward the sprocket hole in tape-and-reel delivery. The metal heatsink tab (Lead 2) must be soldered to a large copper pour or external heatsink to realize its 0.45 °C/W RθJM specification - orientation is non-critical due to symmetry.
What surge waveforms does SM5S54CAHM3/I support per ISO standards?
SM5S54CAHM3/I meets both ISO 7637-2 (for 12 V/24 V automotive electrical systems) and ISO 16750-2 (road vehicles - environmental conditions and testing) surge specifications. Specifically, it withstands Pulse 5a (load dump, 12 V system) and Pulse 5b (load dump with clamp, 24 V system), as well as slow-ramp transients defined in ISO 16750-2 Annex A. Compliance is verified per test condition definitions in the Vishay datasheet.
How does the HM3 suffix affect the material composition and reliability of SM5S54CAHM3/I?
"HM3" denotes halogen-free, RoHS-compliant, Pb-free termination with matte tin plating, AEC-Q101 qualification, and JESD 201 Class 2 whisker resistance. This suffix confirms that SM5S54CAHM3/I meets automotive material sustainability and reliability standards - including resistance to tin whisker growth during thermal cycling and long-term storage - without compromising surge performance or thermal capability.
SM5S54CAHM3/I 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 41.3A
- 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-218AB
SM5S54CAHM3/I FAQ
1.How can I place an order for SM5S54CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S54CAHM3/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 SM5S54CAHM3/I reliable?
The price and inventory of SM5S54CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S54CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM5S54CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S54CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S54CAHM3/I?
SM5S54CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S54CAHM3/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 SM5S54CAHM3/I?
For technical support, including SM5S54CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S54CAHM3/I requirements.
6.How does Aetrix verify that SM5S54CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM5S54CAHM3/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 SM5S54CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM5S54CAHM3/I?
All SM5S54CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S54CAHM3/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 SM5S54CAHM3/I part is unused and in its original packaging.
Return procedure for SM5S54CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S54CAHM3/I Tags
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Diodes Incorporated
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