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Vishay General Semiconductor - Diodes Division SM8S58CAHM3/I
- Part No.:
- SM8S58CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S58CAHM3/I.pdf
- Description:
- 6600 W BI-DIRECTIONAL TVS IS DO-
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
SM8S58CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 64.4 V (min) to 71.2 V (max) breakdown voltage (VBR), 58.0 V stand-off voltage (VWM), and clamps transients up to 93.6 V at 70.5 A peak pulse current (10/1000 µs), operating reliably from −55 °C to +175 °C.
For engineers reviewing the SM8S58CAHM3/I datasheet, SM8S58CAHM3/I pinout, SM8S58CAHM3/I application, or SM8S58CAHM3/I equivalent, this AEC-Q101-qualified DO-218AC TVS delivers 6600 W peak pulse power (10/1000 µs), low leakage (<10 µA at VWM), and meets ISO 7637-2 and ISO 16750-2 surge standards - critical for high-reliability automotive electronics design.
Technical Context
This TVS diode operates in bidirectional avalanche mode to clamp voltage surges induced by inductive switching or load dump events. Its DO-218AC package integrates a metal heatsink terminal for low thermal resistance (RθJM = 0.35 °C/W), enabling robust power dissipation without external heatsinking under transient conditions.
The device exhibits stable clamping performance across temperature: VC remains ≤93.6 V at IPPM = 70.5 A (10/1000 µs) and TJ = 25 °C, with derating applied above 25 °C ambient per JEDEC 51-2A. It supports MSL Level 1 reflow (245 °C peak) and passes JESD 201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.4 V / 71.2 V - Ensures reliable turn-on before system damage during overvoltage events |
| VWM | 58.0 V - Sustains normal 42 V automotive battery operation without leakage conduction |
| VC @ IPPM | 93.6 V @ 70.5 A (10/1000 µs) - Limits downstream IC voltage stress during worst-case transients |
| PPPM (10/1000 µs) | 6600 W - Handles high-energy load dump pulses without failure |
| TJ max | +175 °C - Supports under-hood placement in modern automotive ECUs |
| ID @ VWM | <10 µA at 25 °C - Minimizes standby power loss in always-on vehicle modules |
| Package | DO-218AC - Metal heatsink terminal enables direct PCB thermal coupling for sustained power handling |
Pinout & Package
DO-218AC package with two terminals: Lead 1 (anode/cathode indeterminate due to bidirectional symmetry) and Lead 2/Metal Heatsink (common thermal and electrical reference). No polarity marking; bidirectional operation eliminates cathode band requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode/Cathode (symmetrical) | Interchangeable terminal for bidirectional clamping; connects to protected line (e.g., battery rail) |
| Lead 2 / Metal Heatsink | Common reference & thermal path | Directly soldered to large copper pour for low RθJA (55 °C/W) and efficient heat spreading |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ISO 7637-2 & ISO 16750-2 compliance | Guarantees immunity to standardized automotive surge waveforms (Pulse 5a/b, Load Dump) |
| MSL Level 1 rating | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns |
| Halogen-free, RoHS-compliant (M3) | Meets global environmental regulations and supports green manufacturing requirements |
| TJ = 175 °C capability | Permits operation in high-temperature engine bay environments without derating |
Applications
| Automotive Body Control Module (BCM) | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects BCM microcontroller and CAN transceivers from alternator load dump spikes during battery disconnection. IC Role / Device Role: Primary clamping element on 12 V/42 V main power rail upstream of DC-DC converters. Use Value: Clamps 120 V load dump transients to ≤93.6 V within 1 ns, preventing latch-up or gate oxide rupture in downstream silicon. |
Use Scenario: Shields ECU power management ICs from ISO 16750-2 Pulse 5b (load dump with series impedance). IC Role / Device Role: First-line transient suppression before input filter capacitors and LDO regulators. Use Value: Absorbs 6600 W surge energy without degradation, maintaining system uptime during repeated ignition cycles. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguards image sensor and serializer ICs in front-facing cameras exposed to vehicle-level surges. IC Role / Device Role: Bidirectional TVS on MIPI CSI-2 power rail and camera module VDD lines. Use Value: Sub-10 µA leakage at 58 V ensures minimal impact on low-power sleep modes while clamping fast transients. |
Use Scenario: Protects H-bridge gate drivers and current sense amplifiers from inductive kickback during EPS motor commutation. IC Role / Device Role: Rail-to-rail clamping device across motor phase supply and ground return paths. Use Value: Metal heatsink terminal conducts heat directly into PCB ground plane, sustaining 5000+ surge cycles without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ58CA | DO-214AC package; 55 W steady-state PD vs. SM8S58CAHM3/I's 8.0 W; lower PPPM (400 W vs. 6600 W) | Suitable for lower-energy IEC 61000-4-5 surges, not automotive load dump | Select SMAJ58CA only for industrial/commercial applications with <500 W surge requirements |
| ON Semiconductor 1.5KE56CA | Through-hole DO-201 package; higher VC (93.6 V vs. 93.6 V same), but no AEC-Q101 qualification or ISO compliance | Lacks automotive qualification; unsuitable for production vehicle ECUs | Use 1.5KE56CA only for prototyping or non-automotive legacy designs where qualification is not required |
Compared with SMAJ58CA and 1.5KE56CA, the SM8S58CAHM3/I uniquely combines AEC-Q101 qualification, 6600 W surge capability, DO-218AC thermal performance, and ISO 7637-2 compliance - making it the only drop-in solution for production automotive power rail protection.
Availability
SM8S58CAHM3/I is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, ADAS camera systems, and electric power steering designs requiring stable component supply across long product lifecycles.
Supply support for SM8S58CAHM3/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 SM8SxxCA family was engineered specifically for automotive load dump and ISO 7637-2 transient suppression, emphasizing high-temperature stability, AEC-Q101 compliance, and surface-mount thermal efficiency.
FAQ
What is the maximum clamping voltage of the SM8S58CAHM3/I under standard test conditions?
The SM8S58CAHM3/I has a maximum clamping voltage (VC) of 93.6 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 70.5 A. This value is measured at TJ = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events. The SM8S58CAHM3/I maintains this clamping performance across its full operating temperature range, with documented derating curves provided in the Vishay datasheet.
Is the SM8S58CAHM3/I qualified for automotive use according to industry standards?
Yes, the SM8S58CAHM3/I is AEC-Q101 qualified and explicitly designed for automotive applications. It meets ISO 7637-2 (load dump, pulse 5a/b) and ISO 16750-2 surge immunity requirements, and is rated for continuous operation from −55 °C to +175 °C. The HM3 suffix confirms halogen-free, RoHS-compliant construction and JESD 201 Class 2 whisker resistance - all verified per Vishay's qualification report for the SM8SxxCA family.
What does the "HM3/I" suffix indicate in SM8S58CAHM3/I?
The "HM3/I" suffix in SM8S58CAHM3/I decodes as follows: H = AEC-Q101 qualified; M3 = halogen-free, RoHS-compliant, Pb-free termination; I = 13-inch plastic tape and reel packaging with anode oriented toward sprocket hole. This ordering code identifies the exact qualified variant shipped in industry-standard automated assembly format, distinguishing it from non-automotive or alternate packaging versions.
How does the DO-218AC package of the SM8S58CAHM3/I improve thermal performance compared to standard SMC packages?
The DO-218AC package of the SM8S58CAHM3/I incorporates a dedicated metal heatsink terminal (Lead 2) that provides direct thermal conduction to the PCB, achieving RθJM = 0.35 °C/W - significantly lower than typical SMC packages. This allows the SM8S58CAHM3/I to dissipate 6600 W surge energy without requiring external heatsinks, while maintaining junction temperatures within safe limits during repetitive transients.
Can the SM8S58CAHM3/I be used in bidirectional signal line protection?
No - the SM8S58CAHM3/I is optimized for high-power unidirectional or bidirectional power rail protection (e.g., 12 V/42 V battery lines), not low-capacitance signal line protection. Its junction capacitance is not specified in the datasheet, and its 6600 W rating reflects bulk energy absorption, not fast edge response. For signal lines like CAN or LIN, lower-capacitance TVS arrays such as Vishay's ESD9X series are recommended instead of the SM8S58CAHM3/I.
SM8S58CAHM3/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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 70.5A
- Power - Peak Pulse:
- 6600W (6.6kW)
- 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
SM8S58CAHM3/I FAQ
1.How can I place an order for SM8S58CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S58CAHM3/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 SM8S58CAHM3/I reliable?
The price and inventory of SM8S58CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S58CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM8S58CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S58CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S58CAHM3/I?
SM8S58CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S58CAHM3/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 SM8S58CAHM3/I?
For technical support, including SM8S58CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S58CAHM3/I requirements.
6.How does Aetrix verify that SM8S58CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM8S58CAHM3/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 SM8S58CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM8S58CAHM3/I?
All SM8S58CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S58CAHM3/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 SM8S58CAHM3/I part is unused and in its original packaging.
Return procedure for SM8S58CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S58CAHM3/I Tags
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