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Vishay General Semiconductor - Diodes Division SMCJ8.0CAHM3/I
- Part No.:
- SMCJ8.0CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0CAHM3/I.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,838
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Product details
Overview
SMCJ8.0CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. 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 - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers.
For engineers reviewing the SMCJ8.0CAHM3/I datasheet, SMCJ8.0CAHM3/I pinout, SMCJ8.0CAHM3/I application, or SMCJ8.0CAHM3/I equivalent, this device delivers verified AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial PCB designs requiring robust ESD and surge immunity without layout redesign.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 8.89–9.83 V (min/max) under 1 mA test current. Its low incremental surge resistance enables fast clamping response (<1 ns) and stable energy absorption during repetitive or single-event transients per IEC 61000-4-2/4-4/4-5.
The device uses glass-passivated junction technology and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Thermal resistance is RθJA = 75 °C/W (typical) on recommended 8.0 mm × 8.0 mm copper pads, supporting continuous operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum reverse stand-off voltage before clamping begins; defines safe operating margin below circuit working voltage. |
| VBR (min/max) | 8.89 V / 9.83 V at IT = 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 13.6 V at 110.3 A (10/1000 μs) - Clamping voltage limits downstream IC stress during 1500 W transient surges. |
| PPPM | 1500 W - Peak pulse power rating determines survivability against lightning-induced or inductive-switching surges. |
| ID @ VWM | 50 μA max - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ Range | −55 °C to +150 °C - Extended junction temperature range supports under-hood automotive and industrial ambient conditions. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 8.13 mm footprint and 3.20 mm height for automated placement. |
Pinout & Package
SMCJ8.0CAHM3/I is a bidirectional TVS diode in SMC (DO-214AB) package with no polarity marking; both terminals are electrically symmetrical. The case conforms to JEDEC DO-214AB mechanical standard with center cathode band omitted for bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals conduct identically during positive or negative voltage excursions above VBR - no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for engine control and ADAS sensor protection. |
| Halogen-free & RoHS-compliant (HM3) | Meets IEC 61249-2-21 and JEDEC J-STD-20E requirements - eliminates brominated flame retardants while maintaining UL 94 V-0 flammability rating. |
| MSL Level 1 (260 °C peak) | Enables standard reflow soldering without pre-baking - reduces manufacturing complexity and cost in high-volume SMT lines. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfaces where margin is constrained. |
| Glass-passivated junction | Ensures stable VBR and low leakage over time and temperature - improves long-term field reliability in harsh environments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Ports |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal fidelity during 12 V/24 V system surges while meeting AEC-Q101 stress requirements - avoids false triggering or latch-up in downstream microcontrollers. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against inductive kickback from solenoid or relay switching. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between input line and common rail to clamp spikes up to ±1500 W without degrading DC input threshold accuracy. Use Value: Enables direct interface to field wiring without external series impedance - preserves fast edge response for high-speed discrete I/O detection. |
| Telecom Line Drivers | Consumer Power Adapter Interfaces |
|
Use Scenario: Shielding RS-485/RS-422 transceiver pins from ESD and lightning-induced surges in outdoor network equipment. IC Role / Device Role / Timing Role: Low-capacitance (unspecified but typical <100 pF) bidirectional suppressor placed adjacent to connector to minimize stub length and preserve signal integrity. Use Value: Achieves >15 kV contact ESD immunity per IEC 61000-4-2 while adding negligible loading to differential data lines - maintains 10 Mbps+ data rates. |
Use Scenario: Protecting USB-C or barrel jack input stages in wall adapters and chargers from AC line surges and hot-plug transients. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail upstream of primary-side controller to absorb 1500 W surges before they reach switching FETs or feedback circuitry. Use Value: Prevents catastrophic failure of SMPS controllers during mains-connected surge events - extends product lifetime and reduces warranty returns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CAHM3/I | Lower PPPM (600 W), same VWM/VC, SMB package (smaller footprint, higher RθJA). | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a/b or lightning-level surges. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only. |
| SMCJ8.0CAHE3/I | Same electrical specs, but E3 suffix indicates standard RoHS (not halogen-free) and non-AEC-Q101 qualification. | Not approved for automotive use; may require additional qualification testing for Tier 1 programs. | Choose for commercial/industrial applications where halogen-free and automotive qualification are not mandated. |
Compared with SMCJ8.0CAHM3/I, SMBJ8.0CAHM3/I trades surge capacity for compactness, while SMCJ8.0CAHE3/I sacrifices halogen-free compliance and automotive qualification for cost-sensitive non-automotive deployments - making SMCJ8.0CAHM3/I the optimal choice for AEC-Q101-compliant, high-energy transient protection where material content and reliability are prioritized.
Availability
SMCJ8.0CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line driver safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMCJ8.0CAHM3/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, optoelectronics, and passive components for demanding industrial and automotive applications.
The SMCJ series was engineered specifically for high-power transient suppression in automotive and industrial systems, combining AEC-Q101 qualification, halogen-free construction, and standardized SMC packaging for drop-in integration into legacy and next-generation designs.
FAQ
What does the "HM3" suffix indicate in SMCJ8.0CAHM3/I?
The HM3 suffix in SMCJ8.0CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JEDEC J-STD-20E moisture sensitivity level 1 (peak reflow 260 °C), matte tin plating per J-STD-002, and whisker resistance per JESD 201 Class 2 - essential for automotive and high-reliability industrial use.
Is SMCJ8.0CAHM3/I unidirectional or bidirectional?
SMCJ8.0CAHM3/I is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number and documentation stating "Electrical characteristics apply in both directions." It has no polarity marking and conducts symmetrically during positive or negative overvoltage events - ideal for protecting AC-coupled or differential signal lines.
What is the maximum clamping voltage of SMCJ8.0CAHM3/I under surge conditions?
The maximum clamping voltage (VC) of SMCJ8.0CAHM3/I is 13.6 V when subjected to its rated 110.3 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can SMCJ8.0CAHM3/I replace SMCJ8.0A in an existing design?
No - SMCJ8.0CAHM3/I is bidirectional while SMCJ8.0A is unidirectional; their polarity behavior differs fundamentally. Substituting SMCJ8.0CAHM3/I for SMCJ8.0A would eliminate cathode/anode orientation requirements but may alter circuit behavior in DC-biased applications. Always verify system-level polarity and clamping symmetry before replacement.
What thermal derating applies to SMCJ8.0CAHM3/I above 25 °C ambient?
SMCJ8.0CAHM3/I must be derated linearly above TA = 25 °C per Figure 2 in the datasheet: peak pulse power decreases by approximately 0.8% per °C rise. At 85 °C ambient, PPPM drops to ~1200 W; at 125 °C, it falls to ~900 W. Derating ensures junction temperature remains ≤150 °C under repeated surge conditions.
SMCJ8.0CAHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SMCJ8.0CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0CAHM3/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/I reliable?
The price and inventory of SMCJ8.0CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMCJ8.0CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0CAHM3/I?
SMCJ8.0CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0CAHM3/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/I?
For technical support, including SMCJ8.0CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0CAHM3/I requirements.
6.How does Aetrix verify that SMCJ8.0CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMCJ8.0CAHM3/I?
All SMCJ8.0CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0CAHM3/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/I part is unused and in its original packaging.
Return procedure for SMCJ8.0CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.0CAHM3/I Tags
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