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Vishay General Semiconductor - Diodes Division SMCJ8.0CAHM3_A/I
- Part No.:
- SMCJ8.0CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0CAHM3_A/I.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,988
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Product details
Overview
SMCJ8.0CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 8.0 V stand-off voltage (VWM), 13.6 V maximum clamping voltage (VC) at 110.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ8.0CAHM3_A/I datasheet, SMCJ8.0CAHM3_A/I pinout, SMCJ8.0CAHM3_A/I application, or SMCJ8.0CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), junction temperature derating above 25 °C, and thermal resistance (RθJA = 75 °C/W) under standard PCB pad layout.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 8.89–9.83 V (min/max) at 1 mA test current. Its low incremental surge resistance enables fast clamping response (<1 ns), while glass-passivated junction ensures stable performance across -55 °C to +150 °C operating range.
The device meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and is qualified to AEC-Q101 for automotive use. Its SMC package provides mechanical robustness and thermal dissipation via copper pad mounting (0.31" × 0.31"), critical for sustaining repetitive surge events in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse stand-off voltage before clamping begins; defines safe operating margin below circuit operating voltage. |
| VBR min/max | 8.89 V / 9.83 V at 1 mA - Ensures reliable triggering across manufacturing tolerance and temperature variation. |
| VC @ IPPM | 13.6 V at 110.3 A - Clamping voltage limits transient energy delivered to protected ICs during 10/1000 µs surge. |
| PPPM | 1500 W - Peak pulse power handling capability under standardized surge waveform; determines survivability against lightning or ESD transients. |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in under-hood automotive or high-ambient industrial settings. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient; requires minimum 0.31" × 0.31" copper pads for rated power dissipation. |
| Package | SMC (DO-214AB) - Surface-mount package with 2 terminals, optimized for automated placement and high-current surge conduction. |
Pinout & Package
SMCJ8.0CAHM3_A/I uses a 2-terminal SMC (DO-214AB) package with no polarity marking for bidirectional operation. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Both terminals function identically; no cathode band marking - enables placement without orientation check. |
| Case (body) | Thermal and mechanical interface | Plastic body with UL 94 V-0 flammability rating; transfers heat to PCB copper pads during surge events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge lifetime testing. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for modern automotive and industrial supply chains without compromising surge performance. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes voltage overshoot during transients - critical for protecting 3.3 V or 5 V logic interfaces downstream. |
| Fast response time (<1 ns) | Clamps before transient energy couples into protected circuitry - essential for safeguarding high-speed sensor signals and microcontroller I/O. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead in high-volume SMT lines. |
Applications
| Automotive Body Control Module (BCM) | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protects microcontroller GPIO and LIN bus pins from load-dump and jump-start transients in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point, shunting surge energy to ground before reaching ASIC inputs. Use Value: Withstands 1500 W surges while limiting clamped voltage to 13.6 V - maintains functional safety integrity of 5 V MCU peripherals per ISO 7637-2 Pulse 5a. | Use Scenario: Shields CAN transceiver (e.g., TJA1042) from ESD and inductive switching noise on 12 V power rail and differential bus lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC and common-mode nodes, operating symmetrically to preserve differential signaling integrity. Use Value: 8.0 V VWM aligns with 12 V nominal supply derating; 13.6 V VC prevents transceiver latch-up during ISO 16750-2 load dump events. |
| Smart Home Sensor Hub Power Input | Medical Patient Monitor Signal Conditioning |
Use Scenario: Guards 5 V DC-DC converter input against AC line-induced surges and hot-plug transients in battery-backed IoT gateways. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of input filter capacitor, absorbing energy before it stresses regulator pass FET. Use Value: 1500 W PPPM rating handles IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) surges without degradation over 1000+ events. | Use Scenario: Protects analog front-end ADC inputs and isolated SPI lines from ESD events during clinical cable handling and equipment docking. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on low-voltage sensor signal paths (e.g., thermistor, ECG electrode inputs). Use Value: Symmetric clamping avoids DC offset shift; 13.6 V VC ensures signal integrity remains within ±100 mV of baseline during 8 kV contact ESD (IEC 61000-4-2). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0CAHE3_A/I | Lower PPPM (400 W), smaller SMA package, same VWM/VC specs, AEC-Q101 qualified (HE3 suffix) | Not suitable for 1500 W surge environments; limited to lower-energy transients like ESD-only protection | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only. |
| SMCJ8.0AHE3_A/I | Unidirectional version; identical VWM, VC, PPPM, and package; includes cathode band marking | Requires correct polarity orientation; unsuitable for AC-coupled or floating signal lines | Choose only where circuit topology guarantees unidirectional voltage polarity and layout allows orientation control. |
Compared with SMCJ8.0CAHM3_A/I, SMAJ8.0CAHE3_A/I offers reduced surge capacity in a smaller footprint, while SMCJ8.0AHE3_A/I trades bidirectional flexibility for polarity-sensitive protection - making SMCJ8.0CAHM3_A/I the optimal choice for automotive and industrial applications demanding full-spectrum, orientation-agnostic transient immunity.
Availability
SMCJ8.0CAHM3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN networks, smart home power inputs, and medical signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ8.0CAHM3_A/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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping performance under extreme thermal and electrical stress.
FAQ
What does the "HM3" suffix indicate in SMCJ8.0CAHM3_A/I?
The "HM3" suffix in SMCJ8.0CAHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with automotive reliability standards and environmental regulations, distinguishing it from commercial-grade (E3/M3) or non-automotive variants. This makes SMCJ8.0CAHM3_A/I suitable for under-hood and safety-critical applications where material content and long-term stability are mandated.
Is SMCJ8.0CAHM3_A/I bidirectional, and how does that affect circuit design?
Yes, SMCJ8.0CAHM3_A/I is a bidirectional TVS diode, meaning it clamps symmetrically in both polarities without polarity marking. This eliminates orientation constraints during placement and enables protection of AC-coupled, floating, or differential signal lines - such as CAN bus or sensor bridges - where voltage polarity may reverse. Unlike unidirectional versions like SMCJ8.0AHE3_A/I, SMCJ8.0CAHM3_A/I requires no cathode band alignment, simplifying layout and reducing assembly errors.
What is the maximum clamping voltage of SMCJ8.0CAHM3_A/I, and why does it matter?
The maximum clamping voltage (VC) of SMCJ8.0CAHM3_A/I is 13.6 V at 110.3 A peak pulse current (10/1000 µs waveform). This value defines the highest voltage imposed on protected circuitry during a surge event. A lower VC relative to VWM (13.6 V / 8.0 V = 1.7 ratio) ensures downstream components - such as 5 V MCUs or CAN transceivers - remain within absolute maximum ratings, preventing latch-up or permanent damage during ISO 7637-2 or IEC 61000-4-5 transients.
How does the SMC (DO-214AB) package impact thermal performance of SMCJ8.0CAHM3_A/I?
The SMC (DO-214AB) package of SMCJ8.0CAHM3_A/I delivers a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" copper pads per terminal. This thermal path is essential for dissipating 1500 W surge energy without exceeding the +150 °C maximum junction temperature. Deviation from the recommended pad layout - such as smaller traces or insufficient copper area - will raise RθJA and risk thermal runaway during repeated surges, directly impacting SMCJ8.0CAHM3_A/I reliability.
Can SMCJ8.0CAHM3_A/I replace SMCJ8.0AHE3_A/I in an existing design?
No - SMCJ8.0CAHM3_A/I cannot directly replace SMCJ8.0AHE3_A/I without layout review. While both share identical VWM (8.0 V), VC (13.6 V), and PPPM (1500 W), SMCJ8.0AHE3_A/I is unidirectional and requires cathode-band orientation, whereas SMCJ8.0CAHM3_A/I is bidirectional with no polarity marking. Swapping them introduces risk of incorrect placement or unintended conduction in circuits relying on directional blocking - especially in DC-biased power rails. Verify schematic and layout compatibility before substitution.
SMCJ8.0CAHM3_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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 110.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ8.0CAHM3_A/I FAQ
1.How can I place an order for SMCJ8.0CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0CAHM3_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 SMCJ8.0CAHM3_A/I reliable?
The price and inventory of SMCJ8.0CAHM3_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 SMCJ8.0CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ8.0CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0CAHM3_A/I?
SMCJ8.0CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0CAHM3_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 SMCJ8.0CAHM3_A/I?
For technical support, including SMCJ8.0CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0CAHM3_A/I requirements.
6.How does Aetrix verify that SMCJ8.0CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0CAHM3_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 SMCJ8.0CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ8.0CAHM3_A/I?
All SMCJ8.0CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0CAHM3_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 SMCJ8.0CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ8.0CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.0CAHM3_A/I Tags
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