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Vishay General Semiconductor - Diodes Division SMCJ11CAHM3/I
- Part No.:
- SMCJ11CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11CAHM3/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,299
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Product details
Overview
SMCJ11CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust ESD and surge protection on signal/power lines. It features a 11 V stand-off voltage (VWM), 18.2 V maximum clamping voltage (VC) at 82.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCJ11CAHM3/I datasheet, SMCJ11CAHM3/I pinout, SMCJ11CAHM3/I application, or SMCJ11CAHM3/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and thermal resistance (RθJA = 75 °C/W) under real PCB pad layout constraints.
Technical Context
This device operates as a voltage-clamped crowbar during transients: breakdown occurs symmetrically in both directions (VBR min/max = 12.2 V / 13.5 V at IT = 1 mA), enabling protection of AC-coupled or floating lines without polarity concerns. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response (<1 ns), critical for safeguarding high-speed analog sensors and CAN/LIN bus receivers.
Thermally, it relies on copper pad conduction (0.31" × 0.31" per terminal) to dissipate energy; derating begins above TA = 25 °C per Fig. 2, with max junction temperature limited to +150 °C. The MSL Level 1 rating (260 °C peak reflow) supports standard SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse voltage before clamping initiates; sets operating margin for 12 V nominal systems. |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - Confirmed bidirectional breakdown threshold; ensures symmetrical turn-on across polarity. |
| VC @ IPPM | 18.2 V at 82.4 A - Clamped voltage during 10/1000 µs surge; defines worst-case stress on downstream ICs. |
| PPPM | 1500 W - Peak transient power handling capacity; validated per ANSI/IEEE C62.35 waveform. |
| TJ max. | +150 °C - Absolute maximum junction temperature; constrains sustained power dissipation in sealed enclosures. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient on recommended pad layout; dictates heatsinking requirements. |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm copper pads; compatible with automated placement. |
Pinout & Package
SMCJ11CAHM3/I uses the SMC (DO-214AB) package: a 2-terminal surface-mount device with no polarity marking (bidirectional). Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either polarity) | Acts as cathode during positive transients; bidirectional symmetry eliminates orientation dependency in layout. |
| Cathode | Transient current exit (either polarity) | Acts as anode during negative transients; identical electrical behavior to Anode terminal under reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Halogen-free & RoHS-compliant (HM3) | Meets EU RoHS Directive 2011/65/EU and IEC 61249-2-21; zero brominated flame retardants in molding compound. |
| Low incremental surge resistance | Enables tighter VC/VBR ratio (18.2 V / 12.2 V ≈ 1.49), minimizing let-through energy to protected circuitry. |
| MSL Level 1 | Supports lead-free reflow up to 260 °C peak without baking; eliminates moisture-related popcorning in production. |
| Glass passivated junction | Provides stable leakage (<1 µA at VWM) and long-term parameter consistency across humidity and temperature stress. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and pressure/temperature sensor outputs in engine control units against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and MCU input pin. Use Value: Limits transient voltage to ≤18.2 V during 10/1000 µs surges, preserving signal integrity and preventing latch-up in 3.3 V/5 V microcontrollers. | Use Scenario: Safeguarding PLC digital input modules from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals to shunt surge energy before reaching optocoupler or Schmitt trigger. Use Value: Absorbs 1500 W peak power without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 Level 4 compliance. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
Use Scenario: Shielding RS-485 transceiver pins in base station backhaul equipment from lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) referenced to common ground. Use Value: Symmetric 12.2–13.5 V breakdown ensures balanced clamping on A/B lines, maintaining signal common-mode rejection. | Use Scenario: Adding secondary-level ESD protection on USB 2.0 D+/D− lines behind primary polymer TVS in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional clamp placed directly at connector. Use Value: Sub-1 ns response time diverts >8 kV HBM ESD events before damage occurs to USB PHY transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11CAHE3/A | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VC specs. | Suitable for space-constrained consumer boards where surge energy is <400 W; not rated for automotive AEC-Q101. | Select when board area is critical and surge threat level is lower (IEC 61000-4-2 only). |
| SMCJ11CA-E3/57T | Same electrical specs and SMC package, but commercial-grade (E3 suffix), non-halogen-free, no AEC-Q101 qualification. | Applicable in industrial controls where automotive qualification is unnecessary and halogen content is unrestricted. | Select for cost-sensitive non-automotive designs requiring identical clamping performance and layout compatibility. |
Compared with SMCJ11CAHM3/I, SMAJ11CAHE3/A trades surge robustness and automotive qualification for smaller size, while SMCJ11CA-E3/57T retains full electrical equivalence but omits halogen-free and AEC-Q101 compliance - making SMCJ11CAHM3/I the sole choice for safety-critical, thermally demanding, or regulated automotive deployments.
Availability
SMCJ11CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMCJ11CAHM3/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 harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What does the "HM3" suffix indicate in SMCJ11CAHM3/I?
The HM3 suffix in SMCJ11CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with IEC 61249-2-21 for bromine/chlorine content, adherence to EU RoHS Directive 2011/65/EU, and successful completion of the full AEC-Q101 stress test suite for automotive use. This distinguishes it from commercial-grade variants like SMCJ11CA-E3/57T.
Is SMCJ11CAHM3/I suitable for protecting CAN bus lines?
Yes, SMCJ11CAHM3/I is suitable for CAN bus protection when used differentially across CAN_H and CAN_L with appropriate grounding. Its 11 V VWM aligns with 12 V automotive supply rails, 18.2 V clamping voltage stays within CAN transceiver absolute maximum ratings, and bidirectional operation handles both polarities of ESD or inductive transients without polarity concerns - provided layout minimizes parasitic inductance.
How does the clamping voltage VC of SMCJ11CAHM3/I compare to its breakdown voltage VBR?
SMCJ11CAHM3/I has a VBR range of 12.2 V to 13.5 V at 1 mA test current and a maximum clamping voltage VC of 18.2 V at 82.4 A IPPM. This 4.7–5.0 V differential reflects low incremental surge resistance, ensuring minimal voltage overshoot during high-current transients - a key metric for protecting sensitive 3.3 V or 5 V logic interfaces downstream.
Can SMCJ11CAHM3/I be used in place of a unidirectional TVS like SMCJ11A?
No - SMCJ11CAHM3/I is strictly bidirectional and lacks polarity marking, while SMCJ11A is unidirectional with cathode band identification. Substituting them requires verifying circuit topology: SMCJ11CAHM3/I protects AC or floating nodes (e.g., differential buses), whereas SMCJ11A suits DC-biased lines (e.g., 12 V supply rail). Using SMCJ11CAHM3/I in a unidirectional configuration wastes design margin and may increase leakage.
What is the maximum PCB copper pad size required for SMCJ11CAHM3/I to achieve rated PPPM?
To achieve the full 1500 W peak pulse power rating, SMCJ11CAHM3/I must be mounted on minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads increase thermal resistance, reduce surge current handling, and cause premature thermal runaway - derating curves in Figure 2 quantify this loss above TA = 25 °C.
SMCJ11CAHM3/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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 82.4A
- 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)
SMCJ11CAHM3/I FAQ
1.How can I place an order for SMCJ11CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11CAHM3/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 SMCJ11CAHM3/I reliable?
The price and inventory of SMCJ11CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ11CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11CAHM3/I?
SMCJ11CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11CAHM3/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 SMCJ11CAHM3/I?
For technical support, including SMCJ11CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11CAHM3/I requirements.
6.How does Aetrix verify that SMCJ11CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ11CAHM3/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 SMCJ11CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ11CAHM3/I?
All SMCJ11CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11CAHM3/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 SMCJ11CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ11CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ11CAHM3/I Tags
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