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Vishay General Semiconductor - Diodes Division SMCJ9.0CAHM3/I
- Part No.:
- SMCJ9.0CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ9.0CAHM3/I.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,452
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Product details
Overview
SMCJ9.0CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 9.0 V standoff voltage (VWM), 15.4 V maximum clamping voltage (VC) at 97.4 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), making it suitable for automotive sensor interface protection and industrial I/O line surge suppression.
For engineers reviewing the SMCJ9.0CAHM3/I datasheet, SMCJ9.0CAHM3/I pinout, SMCJ9.0CAHM3/I application, or SMCJ9.0CAHM3/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, SMC (DO-214AB) package thermal performance, and compliance with UL 497B for telecom and automotive safety-critical circuits.
Technical Context
The SMCJ9.0CAHM3/I operates as a bidirectional avalanche diode, providing symmetrical clamping in both polarities without polarity marking. Its glass-passivated junction enables fast response (<1 ps) to transients and low incremental surge resistance, critical for protecting MOSFET gates and microcontroller I/O pins against ESD and inductive switching spikes.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it delivers 6.5 W steady-state power dissipation at TA = 50 °C and maintains stable breakdown behavior across -55 °C to +150 °C junction temperature range, with a VBR range of 10.0–11.1 V at 1 mA test current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V systems. |
| VBR min/max | 10.0 V / 11.1 V at IT = 1 mA - Confirmed breakdown threshold ensures predictable turn-on during surges. |
| VC @ IPPM | 15.4 V at 97.4 A (10/1000 µs) - Clamping voltage limits stress on downstream ICs during worst-case transients. |
| PPPM | 1500 W - Peak surge power handling capacity compatible with ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4. |
| Junction Temp | -55 °C to +150 °C - Enables deployment in under-hood automotive and industrial control environments. |
| Package | SMC (DO-214AB) - Standardized 2-pin SMT outline with 75 °C/W RθJA and MSL Level 1 moisture sensitivity. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
SMCJ9.0CAHM3/I uses the SMC (DO-214AB) surface-mount package: 2-terminal, non-polarized, unmarked case for bidirectional operation. No cathode band or polarity indicator is present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no PCB orientation requirement. |
| Case (cathode side not marked) | Thermal path / mechanical anchor | Exposed metal slug provides primary heat conduction to PCB copper; requires minimum 8.0 mm × 8.0 mm pad per terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions eliminates need for polarity-aware layout or orientation checks. |
| AEC-Q101 qualification | Validated reliability for automotive ECUs, ADAS sensors, and body control modules requiring zero field failure risk. |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with JEDEC J-STD-20 and EU Directive 2011/65/EU for green manufacturing. |
| Low Rsurge | Sub-0.1 Ω dynamic impedance ensures minimal overshoot during fast-rising transients (e.g., ISO 10605 ESD). |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH; supports standard reflow without baking or dry pack handling. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect sensor outputs from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Clamps 12 V system transients to ≤15.4 V, preserving ±100 mV input tolerance of precision ADCs and comparator inputs. |
Use Scenario: Safeguarding 4–20 mA current loop receivers and thermocouple amplifiers in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on analog front-end terminals exposed to motor drive noise and relay coil kickback. Use Value: Withstands repeated 1500 W surges without degradation, ensuring long-term calibration stability in harsh EMI environments. |
| Telecom Power Feeding | Consumer USB-C Port Protection |
|
Use Scenario: Securing PoE (Power over Ethernet) midspan injectors and PSE controllers against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired differential-mode TVS on DC feed lines to meet UL 497B Class B protector requirements. Use Value: UL-recognized construction (QVGQ2 file E136766) enables certification-ready design for telecom infrastructure equipment. |
Use Scenario: Adding secondary-level surge immunity to USB-C receptacles in portable monitors and docking stations. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) bidirectional clamp on VBUS and CC lines to suppress ESD and hot-swap transients. Use Value: Fast <1 ps response prevents latch-up in USB PD controllers while maintaining signal integrity up to 10 Gbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0CAHE3/A | Same VWM/VC but lower PPPM (400 W); SMA package (DO-214AC), higher RθJA (110 °C/W). | Limited to lower-energy transients (IEC 61000-4-2 Level 3); unsuitable for ISO 7637-2 Pulse 5a. | Select when board space is constrained and surge energy is <50 mJ; verify thermal derating at >70 °C ambient. |
| SMCJ9.0CA-E3/57T | Identical electrical specs and SMC package; RoHS-compliant but not halogen-free or AEC-Q101 qualified. | Acceptable for commercial/industrial use only; excluded from automotive production due to missing AEC-Q101 validation. | Choose for cost-sensitive non-automotive designs where HM3's halogen-free and automotive qualifications are unnecessary. |
Compared with SMCJ9.0CAHE3/A and SMCJ9.0CA-E3/57T, the SMCJ9.0CAHM3/I uniquely combines 1500 W surge capability, AEC-Q101 qualification, and halogen-free construction-enabling single-part sourcing for Tier 1 automotive programs without redesign or qualification overhead.
Availability
SMCJ9.0CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom PoE injectors, and consumer USB-C docking stations requiring stable component supply across multi-year production cycles.
Supply support for SMCJ9.0CAHM3/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, and passive components for automotive, industrial, and computing markets.
The SMCJ series was engineered specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 compliance, robust thermal performance, and standardized SMC packaging for automated manufacturing.
FAQ
What does the "HM3" suffix indicate in SMCJ9.0CAHM3/I?
The HM3 suffix in SMCJ9.0CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JEDEC J-STD-20 MSL Level 1, UL 497B recognition (file E136766), and automotive-grade reliability testing including temperature cycling and high-temperature reverse bias. This distinguishes SMCJ9.0CAHM3/I from commercial-grade variants like SMCJ9.0CA-E3/57T.
Is SMCJ9.0CAHM3/I suitable for protecting 12 V automotive power rails?
Yes, SMCJ9.0CAHM3/I is explicitly validated for 12 V automotive systems. Its 9.0 V standoff voltage (VWM) provides margin above nominal 12 V, while its 15.4 V clamping voltage (VC) stays well below the 18–20 V absolute maximum rating of most automotive MCUs and power management ICs. The AEC-Q101 qualification further certifies its suitability for under-hood and chassis-mounted applications subject to load dump and jump-start conditions.
How does SMCJ9.0CAHM3/I differ from unidirectional SMCJ9.0A variants?
SMCJ9.0CAHM3/I is bidirectional, meaning it clamps symmetrically for both positive and negative transients without polarity dependence-ideal for AC-coupled lines or differential buses. In contrast, unidirectional SMCJ9.0A has a defined cathode band and only clamps in reverse bias; forward conduction follows standard diode behavior. The "CA" suffix in SMCJ9.0CAHM3/I explicitly indicates this bidirectional functionality, confirmed by identical VBR and VC values in both directions per Vishay Document 88394.
What is the thermal resistance and recommended PCB layout for SMCJ9.0CAHM3/I?
SMCJ9.0CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay Document 88394. To achieve rated 1500 W pulse power, each pad must be solid copper with ≥2 oz thickness and direct thermal vias to inner ground planes. Reduced pad area increases RθJA and requires derating per Figure 2 in the datasheet.
Does SMCJ9.0CAHM3/I meet UL 497B requirements for telecom protectors?
Yes, SMCJ9.0CAHM3/I carries Underwriters Laboratories recognition under UL 497B (QVGQ2) with file number E136766 for both unidirectional and bidirectional configurations. This certification validates its use in telecom interface protection circuits-including DSL, PoE, and base station line cards-where compliance with surge withstand, leakage current, and flammability (UL 94 V-0) standards is mandatory.
SMCJ9.0CAHM3/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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 97.4A
- 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)
SMCJ9.0CAHM3/I FAQ
1.How can I place an order for SMCJ9.0CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ9.0CAHM3/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 SMCJ9.0CAHM3/I reliable?
The price and inventory of SMCJ9.0CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ9.0CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ9.0CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ9.0CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ9.0CAHM3/I?
SMCJ9.0CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ9.0CAHM3/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 SMCJ9.0CAHM3/I?
For technical support, including SMCJ9.0CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ9.0CAHM3/I requirements.
6.How does Aetrix verify that SMCJ9.0CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ9.0CAHM3/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 SMCJ9.0CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ9.0CAHM3/I?
All SMCJ9.0CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ9.0CAHM3/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 SMCJ9.0CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ9.0CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ9.0CAHM3/I Tags
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DESD3V3E1BL-7B
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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