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Vishay General Semiconductor - Diodes Division SMC3K110CAHM3_A/I
- Part No.:
- SMC3K110CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K110CAHM3_A/I.pdf
- Description:
- 3KW, 110V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,245
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Product details
Overview
SMC3K110CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) designed for automotive-grade circuit protection. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 177 V under 16.9 A surge current, and operates across -55 °C to +175 °C. It is AEC-Q101 qualified and UL 497B recognized (E136766), targeting voltage transient suppression on 110 V DC bus lines in automotive power electronics.
For engineers reviewing the SMC3K110CAHM3_A datasheet, SMC3K110CAHM3_A pinout, SMC3K110CAHM3_A application, or SMC3K110CAHM3_A equivalent, key selection criteria include its 110 V standoff voltage, 122–135 V breakdown range, 30 kV ESD immunity (IEC 61000-4-2), ISO 7637-2 Pulse 1/2a/3a/3b compliance, and SMC (DO-214AB) package compatibility with high-reliability automotive PCB layouts.
Technical Context
This TVS diode employs an avalanche-based silicon junction optimized for fast response (<1 ns) and low dynamic impedance. Its bidirectional architecture enables symmetrical clamping for AC-coupled or floating signal/power rails without polarity sensitivity.
It meets ISO 16750-2 Pulse b load dump requirements for 12 V battery systems and supports repetitive transient suppression per IEC 61000-4-5 (8/20 μs waveform). Thermal design leverages RthJM = 4.0 °C/W to sustain high-energy pulses with minimal junction temperature rise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 110 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 110 V DC systems. |
| Breakdown Voltage (VBR) | 122–135 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above normal operating voltage with margin. |
| Clamping Voltage (VC) | 177 V at 16.9 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream component voltage stress. |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - Sustained energy-handling capability for automotive transients like ISO 7637-2 Pulse 1 and Pulse 2a. |
| ESD Withstand | 30 kV contact & air discharge (IEC 61000-4-2) - Enables robust front-end protection for exposed connectors and sensors without external shielding. |
| Operating Temperature | -55 °C to +175 °C - Supports under-hood and powertrain applications where ambient temperatures exceed 125 °C. |
| AEC-Q101 Qualified | Validated for automotive electronic modules per stress test requirements - confirms reliability for production vehicle ECUs and gate drivers. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak), matte tin-plated terminals solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Transient current sink (bidirectional) | No functional polarity marking; both terminals conduct equally during overvoltage events - simplifies layout and eliminates orientation errors. |
| Anode (unmarked end) | Transient current sink (bidirectional) | Identical electrical behavior to cathode terminal; device functions identically regardless of mounting direction on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or floating DC rails without polarity constraints - reduces BOM count and layout complexity. |
| 30 kW surge rating (8/20 μs) | Supports high-energy lightning-induced surges per IEC 61000-4-5 - suitable for telecom interface protection and industrial fieldbus nodes. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients - critical for protecting sensitive gate drivers and ADC inputs. |
| UL 497B recognition (E136766) | Validates safety compliance for secondary-circuit surge protection in certified end equipment - accelerates regulatory approval. |
| Junction capacitance ≤100 pF | Preserves signal integrity on data lines up to ~100 MHz - applicable to CAN FD, LIN, and sensor analog outputs without bandwidth degradation. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface |
|---|---|
Use Scenario: Protection of 110 V DC bus in 48 V/110 V dual-battery automotive architectures against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Primary transient voltage suppressor placed directly across bus input terminals upstream of DC-DC converters and motor controllers. Use Value: Limits bus voltage to ≤177 V during ISO 16750-2 Pulse b events, preventing catastrophic failure of downstream SiC MOSFETs rated at 200 V. |
Use Scenario: Guarding analog output lines of pressure/temperature sensors in factory automation PLC I/O modules exposed to relay coil kickback. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp on 0–10 V or 4–20 mA signal paths, located adjacent to connector entry points. Use Value: Clamps transients to <200 V within <1 ns while adding <100 pF capacitance - avoids signal distortion and maintains 16-bit ADC accuracy. |
| Telecom Power Feeds | EV Onboard Charger Control |
Use Scenario: Secondary-side surge protection on -48 V DC telecom power feeds subjected to lightning-induced common-mode surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Bidirectional TVS mounted between power rail and chassis ground, rated for 30 kW (8/20 μs) peak pulse. Use Value: Absorbs >95% of 10 kA surge energy without degradation, maintaining system uptime and eliminating fuse blowing during field surges. |
Use Scenario: Input-stage protection for microcontroller-based control logic in 11 kW OBC units handling 110 V auxiliary supply derived from HV battery. IC Role / Device Role / Timing Role: AEC-Q101-qualified TVS placed at MCU power input (VDD_IO), guarding against coupling from isolated DC-DC feedback loops. Use Value: Survives 5000-cycle ISO 7637-2 Pulse 3b testing at 150 V/150 ns - ensures functional safety compliance for ASIL-B control subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110CA | Same VWM (110 V), lower PPPM (400 W), SMA package (smaller footprint, higher RthJA = 150 °C/W) | Limited to low-energy transients (e.g., ESD-only); unsuitable for ISO 7637-2 Pulse 1 or load dump | Select when board space is constrained and surge energy is <50 mJ - not for automotive power rail use. |
| SMCJ110CA | Same SMC package, identical VWM/VBR, but rated for 1500 W (10/1000 μs) and non-AEC-Q101 | Meets industrial IEC 61000-4-5 but lacks automotive qualification and UL 497B recognition | Choose for cost-sensitive industrial controls where AEC-Q101 and UL certification are not required. |
Compared with SMCJ110CA, SMC3K110CAHM3_A doubles peak pulse power and adds AEC-Q101/UL 497B - essential for automotive safety-critical power domains. Versus SMAJ110CA, it provides 7.5× higher surge capacity in the same footprint class, enabling single-device replacement of stacked TVS arrays.
Availability
SMC3K110CAHM3_A is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, telecom power feeds, and EV onboard charger control requiring stable component supply across extended temperature and high-reliability environments.
Supply support for SMC3K110CAHM3_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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for AEC-Q101-compliant automotive transient suppression with enhanced surge robustness and thermal performance in SMC packaging.
FAQ
What is the maximum clamping voltage of SMC3K110CAHM3_A under a 10/1000 μs surge?
The SMC3K110CAHM3_A clamps to a maximum of 177 V when subjected to its rated peak pulse current of 16.9 A with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet (Document Number: 98241, Rev. 09-Jan-2024). The clamping voltage defines the upper voltage limit imposed on protected circuitry during surge events, making it critical for ensuring downstream component survivability.
Is SMC3K110CAHM3_A suitable for ISO 16750-2 Pulse b load dump protection?
Yes, SMC3K110CAHM3_A is validated for ISO 16750-2 Pulse b load dump events in 12 V battery systems, with documented performance up to 101 V, 400 ms pulses. Its 175 °C max junction temperature, low RthJM (4.0 °C/W), and 3000 W peak pulse power enable sustained energy absorption without thermal runaway. The SMC3K110CAHM3_A datasheet includes Fig. 7 showing typical load dump capability curves confirming this use case.
Does SMC3K110CAHM3_A have polarity markings, and how does that affect PCB layout?
No, SMC3K110CAHM3_A is a bidirectional TVS and carries no polarity marking on its SMC (DO-214AB) package. Both terminals function identically as current sinks during overvoltage events, eliminating orientation dependency during placement. This simplifies automated assembly and prevents misorientation-related field failures - a key advantage over unidirectional TVS diodes requiring strict anode/cathode alignment.
What certifications apply to SMC3K110CAHM3_A, and why do they matter?
SMC3K110CAHM3_A holds AEC-Q101 qualification (per note on page 3 of datasheet 98241), UL 497B recognition (file E136766), and IEC 61000-4-2 ESD certification (30 kV contact/air). These validate its suitability for automotive electronics, safety-critical secondary-circuit protection, and harsh EMC environments. For OEMs, these certifications reduce validation effort and support IATF 16949-compliant supply chain requirements.
How does the junction-to-mount thermal resistance (RthJM) of SMC3K110CAHM3_A impact thermal design?
The SMC3K110CAHM3_A has RthJM = 4.0 °C/W (per JEDEC 51-14 TDIM method), meaning each watt of surge power raises the junction temperature only 4 °C above the PCB copper pad temperature. This low value allows effective heat transfer to internal ground planes or thermal pads, enabling repeated high-energy transients without exceeding the 175 °C TJmax. Designers must implement ≥20 mm² of 2-oz copper connected to both terminals to realize this spec.
SMC3K110CAHM3_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):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 16.9A
- 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)
SMC3K110CAHM3_A/I FAQ
1.How can I place an order for SMC3K110CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K110CAHM3_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 SMC3K110CAHM3_A/I reliable?
The price and inventory of SMC3K110CAHM3_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 SMC3K110CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K110CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K110CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K110CAHM3_A/I?
SMC3K110CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K110CAHM3_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 SMC3K110CAHM3_A/I?
For technical support, including SMC3K110CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K110CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K110CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K110CAHM3_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 SMC3K110CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K110CAHM3_A/I?
All SMC3K110CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K110CAHM3_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 SMC3K110CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K110CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K110CAHM3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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