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Vishay General Semiconductor - Diodes Division SMC3K100CAHM3_A/I
- Part No.:
- SMC3K100CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K100CAHM3_A/I.pdf
- Description:
- 3KW, 100V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,945
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Product details
Overview
SMC3K100CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) designed for high-energy surge protection in automotive and industrial power lines. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 162 V under 18.5 A surge current, and features a 100 V stand-off voltage with 111–123 V breakdown range. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/3a/3b and ISO 16750-2 Pulse b standards.
For engineers reviewing the SMC3K100CAHM3_A datasheet, SMC3K100CAHM3_A pinout, SMC3K100CAHM3_A application, or SMC3K100CAHM3_A equivalent, key selection criteria include clamping voltage margin vs. system rail, 100 V working voltage compatibility with 12 V/24 V battery systems, thermal derating above 25 °C, and compliance with automotive transient immunity standards.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its reverse stand-off voltage (VWM = 100 V). Its bidirectional architecture enables symmetrical clamping for both positive and negative surges, critical for unidirectional DC bus lines subject to load dump or inductive switching noise.
It exhibits low incremental surge resistance (18.5 Ω typical at IPPM), enabling tight clamping performance under high-current 10/1000 μs pulses. Thermal design is governed by RthJA = 90 °C/W and RthJM = 4.0 °C/W, supporting operation up to TJ = 175 °C with appropriate PCB copper area per JEDEC 51-2A mounting guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 100 V - Maximum continuous reverse voltage before significant leakage; defines maximum operating DC rail it can protect without conduction. |
| Breakdown Voltage (VBR) | 111–123 V at 1 mA - Voltage range where device transitions from high-impedance to low-impedance clamping state; ensures reliable triggering above VWM. |
| Clamping Voltage (VC) | 162 V at 18.5 A (10/1000 μs) - Peak voltage seen downstream during worst-case surge; determines minimum safe margin for protected ICs/MOSFETs. |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - Energy-handling capability for standard automotive transients; validates robustness against ISO 7637-2 Pulse 1 & 2a. |
| ESD Rating | ±30 kV HBM - Withstands contact and air-gap ESD events per IEC 61000-4-2, eliminating need for upstream ESD diodes in sensor interfaces. |
| Operating Temperature | −55 °C to +175 °C - Enables placement near hot engine control units or under-hood ECUs without thermal derating penalties. |
| AEC-Q101 Qualified | Qualified for automotive electronics - Meets stress test requirements for temperature cycling, humidity, and mechanical shock per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Polarity not marked on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode side of marking band) | Surge return path | Connected to ground or low-impedance reference; carries full transient current during clamping event. |
| Anode (Opposite cathode band) | Protected line interface | Connected directly to the line being protected (e.g., battery feed, CAN bus, sensor supply); voltage referenced to cathode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN H/L, LIN) without polarity concerns. |
| 30 kW surge rating (8/20 μs) | Validates immunity to high-current lightning-induced surges per IEC 61000-4-5, supporting telecom and industrial fieldbus applications. |
| MSL Level 1 (260 °C peak) | Allows standard lead-free reflow without moisture sensitivity concerns; eliminates pre-bake requirement for SMT assembly. |
| UL 497B recognition (E136766) | Confirms safety compliance for use in telecom and industrial equipment requiring certified surge protection components. |
| Junction capacitance ≤ 100 pF | Minimizes signal distortion on high-speed data lines (e.g., USB 2.0, RS-485) while maintaining effective transient suppression. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump (ISO 16750-2 Pulse b) and inductive switching spikes (ISO 7637-2 Pulse 1/2a). IC Role / Device Role / Timing Role: Shunt clamping TVS placed between battery rail and ground, triggered only during overvoltage events. Use Value: Limits transient voltage to ≤162 V, safeguarding downstream PMICs, microcontrollers, and gate drivers rated for ≤200 V absolute max. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Bidirectional clamp across differential pair or single-ended output line to chassis ground. Use Value: Withstands ±30 kV HBM and clamps sub-200 V, preserving ADC input integrity and preventing latch-up in signal conditioning ICs. |
| Telecom DC Power Feeds | Automotive CAN Bus Transceivers |
Use Scenario: Safeguarding PoE-powered equipment or remote radio units connected to long outdoor DC feeds susceptible to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge suppressor on 48 V DC input, coordinated with secondary MOV or GDT stages. Use Value: 30 kW (8/20 μs) rating handles induced surges per IEC 61000-4-5, while low clamping voltage avoids overvoltage damage to DC-DC converters. |
Use Scenario: Protecting high-speed CAN FD transceivers (e.g., TJA1042, SN65HVD256) from ESD and bus faults in vehicle networks. IC Role / Device Role / Timing Role: Bidirectional TVS placed across CAN_H and CAN_L lines, referenced to ground via low-inductance path. Use Value: Clamps common-mode transients to <209 V (8/20 μs), ensuring transceiver survival during ISO 7637-2 Pulse 3a/b events without signal degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100CA | Lower PPPM (600 W), same VWM (100 V), SMB package (smaller footprint, higher RthJA = 110 °C/W) | Not suitable for ISO 7637-2 Pulse 1 (requires ≥3000 W); limited to lower-energy ESD/signal-line protection. | Select when board space is constrained and surge energy is below 600 W - verify clamping margin with actual system transients. |
| SMCJ100CA | Same SMC package, identical VWM/VC/PPPM specs, but lacks AEC-Q101 qualification and UL 497B recognition | Acceptable for industrial/commercial use but not automotive production; no formal automotive reliability validation. | Choose for cost-sensitive non-automotive designs where AEC-Q101 and UL certification are not mandated. |
Compared with SMC3K100CAHM3_A, SMBJ100CA offers smaller size but insufficient energy handling for automotive load dump, while SMCJ100CA matches electrical specs but omits critical automotive and safety certifications required for Tier 1 ECU integration.
Availability
SMC3K100CAHM3_A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and CAN bus systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for SMC3K100CAHM3_A 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 SMC3KxxCAHM3_A series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh automotive environments compliant with ISO 7637 and AEC-Q101.
FAQ
What is the maximum clamping voltage of SMC3K100CAHM3_A under a 10/1000 μs surge?
The SMC3K100CAHM3_A clamps to a maximum of 162 V when subjected to its rated peak pulse current of 18.5 A with a 10/1000 μs waveform. This value is specified in the Electrical Characteristics table and represents the worst-case voltage seen by downstream circuitry during standardized automotive transients such as ISO 7637-2 Pulse 1. The SMC3K100CAHM3_A maintains this clamping performance across its full operating temperature range.
Is SMC3K100CAHM3_A suitable for protecting a 24 V automotive system?
Yes, the SMC3K100CAHM3_A is suitable for 24 V automotive systems. Its 100 V stand-off voltage provides ample margin above the nominal 24 V rail (including load dump peaks up to ~35 V), while its 111–123 V breakdown range ensures reliable triggering well above normal operating conditions. The SMC3K100CAHM3_A is AEC-Q101 qualified and validated for ISO 16750-2 Pulse b, making it appropriate for under-hood and body-control module applications.
Does SMC3K100CAHM3_A have polarity markings on the package?
No, the SMC3K100CAHM3_A does not have polarity markings because it is a bidirectional TVS diode. The device functions identically for positive and negative transients, so no cathode band or other polarity indicator is present on the SMC (DO-214AB) package. Physical orientation on the PCB does not affect electrical performance, though standard layout practices recommend symmetric trace routing to ground.
What is the thermal resistance junction-to-ambient (RthJA) for SMC3K100CAHM3_A?
The thermal resistance junction-to-ambient (RthJA) for SMC3K100CAHM3_A is 90 °C/W, measured per JEDEC 51-2A on a standard FR4 PCB with 2 oz. copper and the recommended mounting pad layout. This value assumes natural convection cooling; adding thermal vias or copper pour reduces effective RthJA. The SMC3K100CAHM3_A also has RthJM = 4.0 °C/W (junction-to-mount), supporting accurate thermal modeling when mounted to heatsinks or metal-core boards.
Can SMC3K100CAHM3_A be used in place of SMCJ100CA in an existing design?
The SMC3K100CAHM3_A shares identical electrical specifications (VWM, VBR, VC, PPPM) and SMC package with SMCJ100CA, but adds AEC-Q101 qualification, UL 497B recognition, and enhanced MSL level 1 process control. If the original design requires automotive compliance or safety certification, the SMC3K100CAHM3_A is a direct upgrade; if not, SMCJ100CA remains functionally equivalent. No PCB changes are needed due to identical footprint and pinout.
SMC3K100CAHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 18.5A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC3K100CAHM3_A/I FAQ
1.How can I place an order for SMC3K100CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K100CAHM3_A/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 SMC3K100CAHM3_A/I reliable?
The price and inventory of SMC3K100CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K100CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K100CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K100CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K100CAHM3_A/I?
SMC3K100CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K100CAHM3_A/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 SMC3K100CAHM3_A/I?
For technical support, including SMC3K100CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K100CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K100CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K100CAHM3_A/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 SMC3K100CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K100CAHM3_A/I?
All SMC3K100CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K100CAHM3_A/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 SMC3K100CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K100CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K100CAHM3_A/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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