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Vishay General Semiconductor - Diodes Division SMCJ7.5CAHM3_A/I
- Part No.:
- SMCJ7.5CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5CAHM3_A/I.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ7.5CAHM3_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 DC power rails and signal lines. It features a 7.5 V stand-off voltage (VWM), 12.9 V maximum clamping voltage (VC) at 116.3 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 modules.
For engineers reviewing the SMCJ7.5CAHM3_A/I datasheet, SMCJ7.5CAHM3_A/I pinout, SMCJ7.5CAHM3_A/I application, or SMCJ7.5CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance (RθJA = 75 °C/W) under PCB pad-limited conduction.
Technical Context
This device operates as a voltage-clamped crowbar during transients: when reverse voltage exceeds the breakdown threshold (VBR min = 8.33 V, max = 9.21 V at IT = 1.0 mA), it enters avalanche conduction to limit downstream voltage to ≤12.9 V. Its bidirectional architecture ensures identical clamping behavior in both polarities, eliminating polarity dependency in AC-coupled or floating signal paths.
Thermally, it sustains 1500 W surge pulses only when mounted on 8.0 mm × 8.0 mm copper pads per terminal; derating begins above TA = 25 °C per Fig. 2. The junction-to-ambient thermal resistance (75 °C/W) and junction-to-lead resistance (15 °C/W) define its steady-state power dissipation limit (PD = 6.5 W at TA = 50 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1.0 mA - Ensures reliable turn-on margin above VWM with <1.2 V hysteresis |
| VC @ IPPM | 12.9 V at 116.3 A - Limits protected circuit voltage during worst-case 10/1000 μs surge |
| PPPM | 1500 W - Peak transient energy handling capability under standardized waveform |
| ID @ VWM | 100 μA - Low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures |
| Package | SMC (DO-214AB) - Surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
SMCJ7.5CAHM3_A/I uses the SMC (DO-214AB) package: a surface-mount, bidirectional device with no polarity marking; both terminals are electrically symmetric. Case dimensions are 7.75 mm × 6.22 mm × 2.62 mm (L × W × H), with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Conducts surge current in either direction; no fixed polarity - functions as line 1 in differential pair or common rail |
| Cathode | Transient current sink (bidirectional) | Electrically identical to Anode; bidirectional symmetry means both terminals clamp identically to ground or reference |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per stress test plan |
| Halogen-free & RoHS-compliant | Meets JEDEC JS-011 and IEC 61249-2-21; eliminates brominated flame retardants without compromising UL 94 V-0 flammability rating |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio = 1.55) versus legacy TVS devices, reducing protected IC stress during ESD/EFT events |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking; supports high-yield SMT manufacturing |
| Glass passivated junction | Provides stable leakage performance and long-term reliability under humid or high-bias conditions |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure sensors from load-dump and ISO 7637-2 pulse 5a transients in engine control units. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor signal line and ground, absorbing >100 A surges within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V sensor front-ends while maintaining <100 μA leakage at 7.5 V nominal rail. | Use Scenario: Shielding 4–20 mA current-loop inputs in programmable logic controllers from field-wiring induced surges and lightning-induced coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp across input terminals, coordinated with series current-limiting resistor and secondary filtering. Use Value: Clamps transients to ≤12.9 V before reaching precision op-amps, preserving 16-bit ADC accuracy and avoiding system reset. |
| Telecom Power Rail Protection | Consumer USB Port ESD Suppression |
Use Scenario: Safeguarding +12 V DC-DC converter outputs feeding Ethernet PHYs and PoE injectors against inductive switching spikes. IC Role / Device Role / Timing Role: Secondary-level TVS placed after bulk capacitance, limiting overshoot during hot-swap or short-circuit recovery. Use Value: Withstands repeated 1500 W surges without degradation, ensuring >10-year field life in telecom infrastructure cabinets. | Use Scenario: Adding board-level ESD immunity to USB 2.0 data lines (D+/D−) and VBUS in portable media players and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (typ. CJ < 100 pF at 0 V) placed adjacent to connector, shunting ±8 kV contact discharge. Use Value: Meets IEC 61000-4-2 Level 4 without signal distortion, thanks to symmetric clamping and sub-1 ns response time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CAHM3_A/I | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VC specs | Suitable for space-constrained consumer electronics but insufficient for automotive load-dump duty cycles | Select when board area is critical and surge energy is ≤600 W; verify thermal margin with RθJA = 110 °C/W |
| SMCJ7.5AHE3_A/I | Unidirectional version; includes cathode band marking; identical VWM/VC/PPPM but asymmetric conduction | Required where DC bias polarity is fixed and reverse conduction must be blocked (e.g., single-supply power rails) | Choose for unidirectional DC systems; avoid in AC-coupled or floating signal paths due to lack of reverse clamping |
Compared with SMBJ7.5CAHM3_A/I and SMCJ7.5AHE3_A/I, the SMCJ7.5CAHM3_A/I uniquely delivers 1500 W bidirectional clamping in an AEC-Q101/halogen-free package - making it the only option qualified for under-hood automotive use with symmetrical surge handling.
Availability
SMCJ7.5CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC analog inputs, telecom power rail hardening, and consumer USB port ESD suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCJ7.5CAHM3_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 harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, 1500 W surge capability, and bidirectional symmetry are mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ7.5CAHM3_A/I?
The "CA" suffix in SMCJ7.5CAHM3_A/I denotes a bidirectional configuration: both terminals function identically as clamping nodes, enabling protection of AC signals, floating buses, or differential pairs without polarity constraints. This differs from unidirectional "A" variants that require correct cathode orientation relative to ground.
Is SMCJ7.5CAHM3_A/I qualified for automotive applications?
Yes, SMCJ7.5CAHM3_A/I carries the HM3 suffix, confirming halogen-free, RoHS-compliant, and AEC-Q101 qualification per Vishay's documentation. It is explicitly rated for automotive use including engine control, body electronics, and ADAS sensor interfaces where temperature cycling and surge immunity are critical.
What is the maximum clamping voltage of SMCJ7.5CAHM3_A/I under surge conditions?
The maximum clamping voltage (VC) of SMCJ7.5CAHM3_A/I is 12.9 V when subjected to its rated 116.3 A peak pulse current (IPPM) using the 10/1000 μs waveform. This value is guaranteed across the full operating temperature range (–55 °C to +150 °C) and defines the upper voltage limit imposed on protected circuitry during transients.
How does the SMC (DO-214AB) package of SMCJ7.5CAHM3_A/I affect thermal performance?
The SMC (DO-214AB) package of SMCJ7.5CAHM3_A/I provides a junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This enables safe dissipation of its 6.5 W steady-state power rating at TA = 50 °C, but requires adherence to the specified pad layout to avoid thermal runaway during repetitive surges.
Can SMCJ7.5CAHM3_A/I replace unidirectional TVS diodes in existing designs?
SMCJ7.5CAHM3_A/I can replace unidirectional variants only if the circuit topology supports bidirectional clamping - such as AC-coupled lines, differential buses, or floating references. In fixed-polarity DC rails, substitution may cause unintended conduction; always verify signal polarity, grounding scheme, and clamping symmetry requirements before redesigning with SMCJ7.5CAHM3_A/I.
SMCJ7.5CAHM3_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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 116.3A
- 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)
SMCJ7.5CAHM3_A/I FAQ
1.How can I place an order for SMCJ7.5CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5CAHM3_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 SMCJ7.5CAHM3_A/I reliable?
The price and inventory of SMCJ7.5CAHM3_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 SMCJ7.5CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ7.5CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5CAHM3_A/I?
SMCJ7.5CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5CAHM3_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 SMCJ7.5CAHM3_A/I?
For technical support, including SMCJ7.5CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5CAHM3_A/I requirements.
6.How does Aetrix verify that SMCJ7.5CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5CAHM3_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 SMCJ7.5CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ7.5CAHM3_A/I?
All SMCJ7.5CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5CAHM3_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 SMCJ7.5CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ7.5CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5CAHM3_A/I Tags
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DESD3V3E1BL-7B
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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