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Vishay General Semiconductor - Diodes Division SMCJ7.5CAHM3/I
- Part No.:
- SMCJ7.5CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5CAHM3/I.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,473
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Product details
Overview
SMCJ7.5CAHM3/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 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), and clamps transients to ≤12.9 V at 116.3 A (10/1000 µs waveform), commonly used on automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCJ7.5CAHM3/I datasheet, SMCJ7.5CAHM3/I pinout, SMCJ7.5CAHM3/I application, or SMCJ7.5CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), 1500 W surge rating, and compatibility with 0.31" × 0.31" copper pad layout per JEDEC standards.
Technical Context
This device operates as a voltage-clamping protector using an avalanche junction structure, responding in <1 ps to fast transients induced by inductive switching or ESD events. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity sensitivity in AC-coupled or floating signal paths.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for protected line. |
| VBR min/max | 8.33 V / 9.21 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 12.9 V at 116.3 A - Clamped voltage under 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling; enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 100 µA - Reverse leakage at stand-off voltage; low enough to avoid signal integrity degradation in high-impedance sensor circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive placement and industrial ambient conditions. |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm thermal pad footprint; optimized for automated assembly and PCB heat dissipation. |
Pinout & Package
SMCJ7.5CAHM3/I uses the SMC (DO-214AB) package: a surface-mount, bidirectional device with no polarity marking (unlike unidirectional variants). The two terminals are symmetrical and interchangeable; neither is designated anode or cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | AC Input / Signal Line | Connected to protected node (e.g., CAN_H or LIN bus); accepts transient energy from either polarity. |
| Terminal 2 | AC Input / Signal Line | Connected to same protected node or ground reference; completes symmetrical clamping path with Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled, differential, or floating signal lines without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Halogen-free & RoHS | HM3 suffix guarantees compliance with automotive environmental standards and end-of-life recycling requirements. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge). |
| MSL Level 1 | Rated for reflow up to 260 °C peak; supports standard lead-free assembly without moisture sensitivity handling. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure or temperature sensors in engine compartments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt surge energy before reaching ADC input or signal conditioner. Use Value: Limits transient voltage to ≤12.9 V, preventing latch-up or damage to 3.3 V/5 V sensor interface ICs while maintaining signal fidelity below 7.5 V. | Use Scenario: Safeguarding RS-485 transceiver data lines in factory automation PLCs subject to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamp across differential pair (A/B) to suppress common-mode and differential-mode transients simultaneously. Use Value: Withstands 1500 W pulses per IEC 61000-4-5, enabling Class B/C immunity without additional series impedance or filtering complexity. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
Use Scenario: Secondary-side DC bus protection in USB-C PD adapters where 12 V rails feed controller ICs vulnerable to capacitor discharge events. IC Role / Device Role / Timing Role: Standoff-rated clamp between VBUS and GND, activated only during overvoltage faults exceeding 7.5 V. Use Value: Low 100 µA leakage avoids quiescent current penalty; fast response prevents propagation of 100 ns spikes into power management ICs. | Use Scenario: Overvoltage hardening of Ethernet PHY interface pins on telecom base station line cards exposed to induced surges from nearby RF equipment. IC Role / Device Role / Timing Role: Point-of-entry TVS on MDI pins (TX+/TX−, RX+/RX−) to absorb fast transients before reaching magnetics or PHY silicon. Use Value: Symmetrical 8.33–9.21 V VBR ensures balanced clamping on differential pairs, preserving common-mode rejection ratio during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5CA-E3/57T | Lower PPPM (400 W), SMA package (smaller thermal mass), non-AEC-Q101, RoHS-compliant E3 suffix. | Suitable for cost-sensitive consumer electronics with lower surge exposure; not rated for automotive under-hood use. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only. |
| SMCJ7.5CAHE3_A/I | Same electrical specs and SMC package, but HE3 suffix indicates RoHS-compliant + AEC-Q101 qualified (non-halogen-free). | Acceptable for automotive applications where halogen-free requirement is waived; identical thermal and clamping performance. | Choose if halogen content is not restricted by OEM specification but AEC-Q101 compliance is mandatory. |
Compared with SMCJ7.5CAHM3/I, SMAJ7.5CA-E3/57T offers reduced surge capacity and smaller footprint but lacks automotive qualification, while SMCJ7.5CAHE3_A/I matches all critical parameters except halogen content-making it a direct functional alternative where material restrictions differ.
Availability
SMCJ7.5CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and telecom line card designs requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for SMCJ7.5CAHM3/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 1500 W surge immunity and AEC-Q101 qualification are mandatory design requirements.
FAQ
What does the 'HM3' suffix mean in SMCJ7.5CAHM3/I?
The HM3 suffix in SMCJ7.5CAHM3/I denotes halogen-free, RoHS-compliant construction and AEC-Q101 qualification. It confirms compliance with automotive environmental standards and reliability testing for under-hood and chassis-mounted applications. This distinguishes SMCJ7.5CAHM3/I from commercial-grade variants like SMCJ7.5CA-E3/57T and ensures suitability for Tier 1 automotive supply chains.
Is SMCJ7.5CAHM3/I unidirectional or bidirectional?
SMCJ7.5CAHM3/I is a bidirectional transient voltage suppressor, as indicated by the 'CA' in its part number. It provides symmetrical clamping in both polarities with identical VBR (8.33–9.21 V), VC (≤12.9 V), and surge capability-ideal for protecting AC-coupled, differential, or floating signal paths without polarity constraints.
What is the maximum clamping voltage of SMCJ7.5CAHM3/I under surge conditions?
The maximum clamping voltage (VC) of SMCJ7.5CAHM3/I is 12.9 V at 116.3 A, measured under the standardized 10/1000 µs double-exponential surge waveform. This value represents the peak voltage seen by downstream circuitry during worst-case transient events and is critical for ensuring compatibility with 3.3 V or 5 V logic interfaces.
Does SMCJ7.5CAHM3/I require a heatsink for 1500 W pulse handling?
No, SMCJ7.5CAHM3/I does not require an external heatsink for single-pulse 1500 W events, as its thermal design relies on short-duration energy absorption. However, the datasheet specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to ensure adequate transient heat dissipation and sustained reliability. Continuous power dissipation remains limited to 6.5 W at TA = 50 °C.
How does SMCJ7.5CAHM3/I compare to SMCJ7.5A in terms of functionality?
SMCJ7.5CAHM3/I is bidirectional with symmetrical clamping, while SMCJ7.5A is unidirectional and features a cathode band marking. Both share identical VWM (7.5 V), VBR range, and PPPM (1500 W), but SMCJ7.5A conducts forward current and has different leakage behavior. SMCJ7.5CAHM3/I is preferred for AC signal lines or differential buses where polarity cannot be guaranteed.
SMCJ7.5CAHM3/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):
- 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/I FAQ
1.How can I place an order for SMCJ7.5CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5CAHM3/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/I reliable?
The price and inventory of SMCJ7.5CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMCJ7.5CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5CAHM3/I?
SMCJ7.5CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5CAHM3/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/I?
For technical support, including SMCJ7.5CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5CAHM3/I requirements.
6.How does Aetrix verify that SMCJ7.5CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMCJ7.5CAHM3/I?
All SMCJ7.5CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5CAHM3/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/I part is unused and in its original packaging.
Return procedure for SMCJ7.5CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5CAHM3/I Tags
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