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Vishay General Semiconductor - Diodes Division SMCG7.5CA-M3/57T
- Part No.:
- SMCG7.5CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG7.5CA-M3/57T.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,773
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Product details
Overview
SMCG7.5CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) 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 1.0 mA test current, 1500 W peak pulse power (10/1000 µs), clamping voltage of 12.9 V at 116.3 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG7.5CA-M3/57T datasheet, SMCG7.5CA-M3/57T pinout, SMCG7.5CA-M3/57T application, or SMCG7.5CA-M3/57T equivalent, this device is selected for high-energy surge suppression in automotive sensor interfaces, industrial I/O lines, and bidirectional signal line protection where low clamping voltage, fast response (<1 ns), and halogen-free RoHS compliance are critical design requirements.
Technical Context
The SMCG7.5CA-M3/57T operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<100 µA at VWM), while its DO-215AB package delivers low thermal resistance (RθJL = 15 °C/W) and supports automated SMT placement on standard 8.0 mm × 8.0 mm copper pads.
It complies with ANSI/IEEE C62.35 for surge protection devices and meets JESD201 Class 2 whisker resistance. With a maximum junction temperature of +150 °C and MSL Level 1 rating (260 °C peak reflow), it supports high-reliability operation in under-hood automotive and industrial environments subject to repetitive surge stress.
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 lines. |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - Confirmed breakdown range ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 12.9 V at 116.3 A - Clamping voltage during 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 1500 W - Peak pulse power handling capacity; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| ID @ VWM | <100 µA - Low reverse leakage preserves signal integrity and minimizes standby power loss in battery-powered systems. |
| TJ max. | +150 °C - Enables use in high-ambient environments such as engine control units and motor drives. |
| AEC-Q101 | Qualified - Validated for automotive applications including sensor modules, body control units, and infotainment interfaces. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded package with matte tin-plated terminals, 0.220–0.245 inch body length, 0.115–0.125 inch width, and 0.024–0.040 inch height. Bidirectional construction means no polarity marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as anode or cathode depending on transient polarity; no orientation required during PCB layout. |
| Lead 1 / Lead 2 | Thermal and electrical interface | Both leads conduct surge current and dissipate heat; mounted on 8.0 mm × 8.0 mm copper pads per terminal for optimal RθJA (75 °C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN FD, LIN, RS-485) without polarity concerns. |
| 1500 W peak pulse power | Withstands repeated 10/1000 µs surges up to 116.3 A, meeting ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 requirements. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per AEC standard. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-203 material restrictions for green manufacturing. |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow profiles without pre-baking, reducing assembly complexity and cost. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamps ±100 V transients within nanoseconds to prevent latch-up or gate oxide damage in downstream ADCs and op-amps. Use Value: Maintains signal fidelity below 12.9 V clamping threshold while surviving >1000 surges per AEC-Q101 stress testing. | Use Scenario: Shielding PLC digital input channels from field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Acts as primary front-end surge limiter on 24 V DC inputs, diverting energy before it reaches optocouplers or microcontroller GPIOs. Use Value: Eliminates need for external series impedance or secondary clamping stages due to low dynamic impedance and 1500 W rating. |
| Automotive Body Electronics | Consumer Device Port Protection |
Use Scenario: Safeguarding LIN bus transceivers and LED driver control lines in door modules and lighting control units. IC Role / Device Role / Timing Role: Provides bidirectional ESD and surge immunity on low-voltage (7–12 V) communication lines without affecting bus timing or signal rise/fall times. Use Value: Enables direct integration into compact modules with no derating needed up to +125 °C ambient. | Use Scenario: Protecting USB-C CC and SBU lines in portable audio devices and docking stations from human-body-model (HBM) ESD and cable-induced transients. IC Role / Device Role / Timing Role: Functions as low-capacitance (<50 pF typical at 0 V) bidirectional clamp to preserve high-speed signal integrity while suppressing >8 kV contact ESD. Use Value: Meets IEC 61000-4-2 Level 4 without degrading USB 2.0 eye diagram or introducing jitter. |
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 | Same VWM (7.5 V) and bidirectional configuration, but lower PPPM (400 W) and larger SMA (DO-214AC) package. | Limited to lower-energy surges (IEC 61000-4-5 Level 2); less suitable for automotive load-dump scenarios. | Select SMAJ7.5CA only when board space allows larger footprint and surge threat level is ≤400 W. |
| SMCJ7.5CA | Same DO-214AB package family but higher PPPM (1500 W), identical VWM/VBR/VC specs, and AEC-Q101 qualified variant available (SMCJ7.5CAHE3). | Offers same protection level with broader industry adoption and longer supply chain history; slightly higher RθJA (85 °C/W vs. 75 °C/W). | SMCJ7.5CA is a functionally aligned alternative with proven field reliability; verify pad layout compatibility (DO-214AB vs. DO-215AB). |
Compared with SMAJ7.5CA and SMCJ7.5CA, the SMCG7.5CA-M3/57T delivers identical clamping performance in a smaller DO-215AB outline, lower thermal resistance, and halogen-free compliance-making it optimal for next-gen automotive modules where space, thermal headroom, and environmental compliance are prioritized.
Availability
SMCG7.5CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and consumer port-level surge suppression requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SMCG7.5CA-M3/57T 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 SMCG series was developed specifically for high-power, surface-mount transient suppression in automotive and industrial environments where compact size, AEC-Q101 compliance, and consistent clamping performance across temperature are mandatory.
FAQ
What does the "CA" suffix indicate in SMCG7.5CA-M3/57T?
The "CA" suffix denotes a bidirectional configuration, meaning the SMCG7.5CA-M3/57T provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMCG7.5A), it has no cathode band marking and is used where polarity of transients cannot be assumed-such as on differential buses or AC-coupled signal lines. This is confirmed in Vishay's documentation under "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SMCG7.5CA-M3/57T suitable for automotive under-hood applications?
Yes, SMCG7.5CA-M3/57T is AEC-Q101 qualified and rated for TJ = –55 °C to +150 °C, making it suitable for under-hood automotive use. Its DO-215AB package supports MSL Level 1 reflow, and its 1500 W PPPM withstands load-dump events per ISO 7637-2. The M3 suffix confirms halogen-free, RoHS-compliant construction required by Tier 1 automotive suppliers-verified in Vishay Document 88457, page 1 and ordering table.
How does the clamping voltage of SMCG7.5CA-M3/57T compare to its stand-off voltage?
The SMCG7.5CA-M3/57T has a VWM of 7.5 V and a VC of 12.9 V at 116.3 A, resulting in a clamping ratio of ~1.72. This indicates strong overvoltage limiting capability: the device remains non-conductive below 7.5 V, then rapidly transitions to low-impedance conduction above VBR (8.33–9.21 V), limiting transient peaks to just 12.9 V. This margin protects 12 V-rated ICs such as CAN transceivers and microcontrollers without overstressing their absolute maximum ratings.
What is the significance of the "M3" in SMCG7.5CA-M3/57T?
The "M3" denotes halogen-free, RoHS-compliant, industrial-grade construction per Vishay's ordering nomenclature. It specifies matte tin-plated leads compliant with J-STD-002 and JESD22-B102, plus JESD201 Class 2 whisker resistance. Unlike "E3", M3 parts meet stricter material restrictions for flame retardancy and environmental safety-critical for automotive and industrial certifications. This is explicitly defined in the Mechanical Data section of Document 88457, page 1.
Can SMCG7.5CA-M3/57T replace SMCG7.5A in an existing design?
No-SMCG7.5CA-M3/57T is bidirectional, while SMCG7.5A is unidirectional with a cathode band. Substituting them requires verifying circuit topology: unidirectional devices rely on polarity for proper biasing (e.g., protecting DC power rails), whereas bidirectional types are used on AC or floating lines. The SMCG7.5CA-M3/57T will not function correctly if placed across a DC supply without additional polarity control, as confirmed in Vishay's polarity note on page 1: "no marking on bidirectional types".
SMCG7.5CA-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG7.5CA-M3/57T FAQ
1.How can I place an order for SMCG7.5CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG7.5CA-M3/57T 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 SMCG7.5CA-M3/57T reliable?
The price and inventory of SMCG7.5CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG7.5CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG7.5CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG7.5CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG7.5CA-M3/57T?
SMCG7.5CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG7.5CA-M3/57T 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 SMCG7.5CA-M3/57T?
For technical support, including SMCG7.5CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG7.5CA-M3/57T requirements.
6.How does Aetrix verify that SMCG7.5CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG7.5CA-M3/57T 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 SMCG7.5CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG7.5CA-M3/57T?
All SMCG7.5CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG7.5CA-M3/57T, 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 SMCG7.5CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCG7.5CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG7.5CA-M3/57T Tags
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