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Vishay General Semiconductor - Diodes Division SMCG40AHE3/57T
- Part No.:
- SMCG40AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG40AHE3/57T.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,078
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Product details
Overview
SMCG40AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for robust overvoltage protection of sensitive electronics. It features a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 23.3 A peak pulse current (IPPM), and clamps to ≤64.5 V at rated surge. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, power supply inputs, and MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SMCG40AHE3/57T datasheet, SMCG40AHE3/57T pinout, SMCG40AHE3/57T application, or SMCG40AHE3/57T equivalent, this page delivers verified electrical parameters, mechanical package details, real-world protection use cases, and validated alternative parts - all aligned with Vishay's official 88457 specification document dated 09-Jan-2024.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when reverse voltage exceeds its breakdown threshold. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced surges, and load-dump transients.
The SMCG40AHE3/57T uses a glass-passivated silicon junction and is packaged in the DO-215AB outline with matte tin-plated leads. It meets JESD201 Class 2 whisker resistance, MSL Level 1 per J-STD-020, and UL 497B recognition under file E136766.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR (min/max) | 44.4 V / 49.1 V at IT = 1 mA - Confirmed breakdown window ensures reliable turn-on without premature conduction. |
| VC @ IPPM | ≤64.5 V at 23.3 A - Clamping voltage under full 1500 W surge; determines maximum stress on downstream ICs. |
| PPPM | 1500 W (10/1000 µs waveform) - Peak surge energy handling capacity for standardized transient immunity testing. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and industrial power systems. |
| RθJA | 75 °C/W - Thermal resistance informs PCB copper pad design (0.31" × 0.31") for sustained 6.5 W power dissipation. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with cathode band marking; meets UL 94 V-0 flammability rating and AEC-Q101 qualification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in unidirectional configuration. | Provides return path during clamping; polarity must match PCB silkscreen band (cathode-marked end). |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., CAN_H, LIN, sensor VOUT). | Band-marked lead identifies cathode; reverse-biased during normal operation; conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per JEDEC standards. |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives, critical for under-hood deployment. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping precision and reducing risk of downstream latch-up. |
| MSL Level 1 rating | Enables standard SMT reflow without pre-baking; peak solder temperature up to 260 °C permitted. |
| UL 497B recognition (E136766) | Confirms compliance for telecom and industrial surge protection applications requiring third-party safety certification. |
Applications
| Automotive Sensor Protection | Industrial Power Supply Input |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ECU input, clamping transients before they reach ADC front-end or op-amp buffer. Use Value: Limits induced voltage to ≤64.5 V during 1500 W surges, preventing ADC saturation and preserving measurement accuracy across -40 °C to +125 °C ambient. |
Use Scenario: Safeguarding 24 V DC input rails of PLC I/O modules subjected to inductive kickback from solenoid drivers and relay coils. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, coordinated with upstream fuse and downstream DC-DC converter. Use Value: Absorbs 23.3 A peak surge current without degradation, maintaining system uptime and eliminating need for redundant crowbar circuits. |
| Automotive Body Control Module (BCM) | Telecom Interface Protection |
|
Use Scenario: Shielding LIN bus transceivers and LED driver outputs in door modules and lighting controllers from battery reverse-polarity and jump-start events. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and ground, with cathode tied to LIN and anode to chassis ground. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), enabling robust protection during 12 V system fault conditions without failure. |
Use Scenario: Protecting RS-485 transceiver pins in base station backhaul equipment from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Line-to-ground TVS on differential pair (A/B), placed immediately after connector to minimize stub length. Use Value: Delivers <1 ns response and 64.5 V clamping to keep transceiver stress below absolute maximum ratings per TIA/EIA-485-A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A-E3/52T | Same VWM (40 V), lower PPPM (400 W), SMA (DO-214AC) package, RθJA = 100 °C/W. | Limited to lower-energy transients; unsuitable for automotive load-dump where 1500 W is required. | Select only for cost-sensitive consumer applications with sub-500 W surge requirements and space-constrained layouts. |
| SMCJ40A-E3/57T | Same VWM (40 V), identical PPPM (1500 W), same DO-215AB package, but not AEC-Q101 qualified. | Lacks automotive qualification; requires additional validation for vehicle integration. | Use in industrial or telecom designs where AEC-Q101 is not mandated and traceable automotive sourcing is unnecessary. |
Compared with SMAJ40A-E3/52T and SMCJ40A-E3/57T, the SMCG40AHE3/57T uniquely combines 1500 W surge capability, AEC-Q101 qualification, and UL 497B recognition - making it the only option qualified for direct use in production automotive ECUs without requalification.
Availability
SMCG40AHE3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power supply input hardening, and telecom interface surge suppression requiring stable component supply, full AEC-Q101 traceability, and UL-certified performance.
Supply support for SMCG40AHE3/57T 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 validation.
The SMCG series was developed specifically for high-energy transient suppression in automotive and industrial environments, targeting AEC-Q101 compliance, UL safety recognition, and robust thermal performance in compact surface-mount formats.
FAQ
What is the clamping voltage of SMCG40AHE3/57T at its rated peak pulse current?
The SMCG40AHE3/57T clamps to a maximum of 64.5 V when subjected to its rated peak pulse current of 23.3 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88457, ensuring predictable overvoltage limiting for downstream ICs such as microcontrollers and transceivers.
Is SMCG40AHE3/57T suitable for bidirectional transient protection?
No, SMCG40AHE3/57T is a unidirectional TVS diode - indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" variant (e.g., SMCG40CA). Using SMCG40AHE3/57T in bidirectional applications risks forward conduction during negative transients and invalidates its specified clamping behavior.
What does the "HE3/57T" suffix mean in SMCG40AHE3/57T?
The "HE3" denotes RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads meeting JESD201 Class 2 whisker resistance. The "57T" indicates packaging in 7-inch plastic tape-and-reel format with 850 units per reel - a standard logistics code defined in Vishay's ordering information table (Document 88457, page 3).
How does SMCG40AHE3/57T differ from standard SMAJ or SMCJ series TVS diodes?
SMCG40AHE3/57T shares the DO-215AB package and 1500 W rating with SMCJ40A but adds AEC-Q101 qualification and UL 497B recognition (E136766). Unlike SMAJ40A, it offers triple the peak pulse power and superior thermal resistance (RθJA = 75 °C/W vs. 100 °C/W), enabling higher reliability in automotive under-hood locations.
What PCB layout guidance applies to SMCG40AHE3/57T for optimal surge performance?
Vishay specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power and 75 °C/W thermal resistance. Trace inductance must be minimized - keep TVS leads short and direct to ground plane; avoid vias or narrow traces between cathode and protected line.
SMCG40AHE3/57T 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 23.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG40AHE3/57T FAQ
1.How can I place an order for SMCG40AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG40AHE3/57T 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 SMCG40AHE3/57T reliable?
The price and inventory of SMCG40AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG40AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG40AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG40AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG40AHE3/57T?
SMCG40AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG40AHE3/57T 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 SMCG40AHE3/57T?
For technical support, including SMCG40AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG40AHE3/57T requirements.
6.How does Aetrix verify that SMCG40AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG40AHE3/57T 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 SMCG40AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG40AHE3/57T?
All SMCG40AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG40AHE3/57T, 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 SMCG40AHE3/57T part is unused and in its original packaging.
Return procedure for SMCG40AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG40AHE3/57T Tags
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