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Vishay General Semiconductor - Diodes Division SMCG20AHE3/57T
- Part No.:
- SMCG20AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG20AHE3/57T.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,909
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Product details
Overview
SMCG20AHE3/57T 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 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 46.3 A peak pulse current (IPPM), and clamps to ≤32.4 V at rated surge - ideal for automotive power line and CAN bus interface protection.
For engineers reviewing the SMCG20AHE3/57T datasheet, SMCG20AHE3/57T pinout, SMCG20AHE3/57T application, or SMCG20AHE3/57T equivalent, key selection considerations include its AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.42), 75 °C/W junction-to-ambient thermal resistance, and compatibility with automated SMT assembly on standard 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device with a cathode-band-marked polarity. Its glass-passivated junction delivers fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of 10/1000 µs transients induced by inductive switching or ESD events.
The SMCG20AHE3/57T is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020, and supports 200 A non-repetitive forward surge current (IFSM) - confirming suitability for high-energy automotive and industrial power rail protection where reliability under thermal stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 22.2 V / 24.5 V at IT = 1 mA - ensures predictable turn-on threshold across production lot; tight 10% tolerance enables precise system-level surge margining. |
| VC @ IPPM | ≤32.4 V at 46.3 A - clamping voltage during 10/1000 µs surge; low VC/VBR ratio (1.42) minimizes stress on downstream ICs like microcontrollers or transceivers. |
| PPPM | 1500 W - peak pulse power handling capability; validates robustness against ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at stand-off voltage; prevents parasitic loading in high-impedance sensor or communication lines. |
| TJ max. | +150 °C - extended junction temperature rating supports under-hood automotive placement without derating penalties. |
| RθJA | 75 °C/W - thermal resistance measured on 0.31" × 0.31" copper pads; informs PCB thermal design for sustained power dissipation up to 6.5 W. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals, UL 94 V-0 molding compound, and AEC-Q101 qualification. Dimensions: 7.87 mm × 9.64 mm × 2.41 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side return path. | Must be routed to lowest-impedance ground plane to minimize clamping loop inductance during surge events. |
| Cathode | Current exit terminal in forward bias; marked with band; connects to protected line (e.g., 12 V rail or CAN_H). | Band orientation confirms unidirectional polarity; incorrect mounting causes open-circuit failure during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, body electronics, and ADAS modules. |
| Glass passivated junction | Enables stable VBR over lifetime and immunity to moisture-induced parameter drift - critical for long-term field operation in humid environments. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning; eliminates manufacturing yield loss in high-volume SMT lines. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during surge, protecting 3.3 V or 5 V logic interfaces even when placed upstream of LDOs or DC-DC converters. |
| 1500 W PPPM with 10/1000 µs waveform | Meets ISO 16750-2 and IEC 61000-4-5 surge immunity requirements for Class III/IV automotive systems without external series impedance. |
Applications
| Automotive Power Rail Protection | CAN Bus Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a (100 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping surges before they reach DC-DC regulators or MCU power pins. Use Value: Withstands 200 A IFSM and clamps to ≤32.4 V, preventing latch-up or burnout in 3.3 V/5 V domain ICs while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding CAN transceivers (e.g., TJA1042, SN65HVD230) against ESD and coupled noise on differential bus lines. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to common ground, suppressing common-mode transients without distorting signal integrity. Use Value: Low 1.0 µA ID at 20 V VWM avoids signal attenuation; fast <1 ns response preserves CAN bit timing up to 1 Mbps. |
| Industrial Sensor Signal Line Protection | Consumer Power Adapter Input Stage |
|
Use Scenario: Shielding 4–20 mA or 0–10 V analog sensor outputs from field wiring-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Low-leakage TVS mounted at connector entry point, shunting transients before signal conditioning op-amps or ADC inputs. Use Value: Sub-µA leakage ensures measurement accuracy; 75 °C/W RθJA allows direct PCB mounting without heatsinks in space-constrained enclosures. |
Use Scenario: Secondary-side overvoltage clamp in AC-DC adapters for smart home devices, preventing damage from output capacitor failure or feedback loop loss. IC Role / Device Role / Timing Role: Unidirectional TVS across regulated DC output (e.g., 5 V or 12 V), acting as last-resort crowbar during regulator fault conditions. Use Value: 1500 W PPPM handles energy from bulk capacitor discharge; RoHS-compliant HE3 suffix satisfies global regulatory requirements for consumer goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/57T | Same VWM (20 V), but lower PPPM (400 W); SMA (DO-214AC) package with higher RθJA (110 °C/W). | Limited to lower-energy surges (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 load dump. | Select SMCG20AHE3/57T when 1500 W surge handling and AEC-Q101 qualification are mandatory. |
| SMCJ20AHE3/57T | Identical electrical specs (VWM, VBR, PPPM, VC), same AEC-Q101 and HE3 suffix, but in larger SMC (DO-214AB) package (8.2 mm × 6.2 mm). | Higher thermal mass improves sustained surge endurance; requires larger PCB footprint and different pad layout. | Choose SMCG20AHE3/57T for space-constrained layouts where DO-215AB's 7.87 mm × 9.64 mm footprint is preferred over SMC's 8.2 mm × 6.2 mm. |
Compared with SMAJ20A-E3/57T and SMCJ20AHE3/57T, the SMCG20AHE3/57T uniquely balances 1500 W surge capability, AEC-Q101 qualification, and compact DO-215AB packaging - making it optimal for automotive and industrial designs where board area, thermal performance, and compliance must coexist.
Availability
SMCG20AHE3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, CAN bus interface hardening, and industrial sensor signal line safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMCG20AHE3/57T 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 automotive-grade qualification.
The SMCG series is engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 1500 W surge resilience are non-negotiable.
FAQ
What is the clamping voltage of SMCG20AHE3/57T at its rated peak pulse current?
The SMCG20AHE3/57T clamps to a maximum of 32.4 V at its rated peak pulse current of 46.3 A (10/1000 µs waveform). This value is specified in the Vishay datasheet Document Number 88457, Table on page 2, and reflects worst-case performance under standardized surge conditions - critical for verifying voltage margin at the protected IC's absolute maximum ratings.
Is SMCG20AHE3/57T suitable for bidirectional transient suppression?
No, SMCG20AHE3/57T is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMCG20CA variant. Using SMCG20AHE3/57T in bidirectional applications would result in forward conduction during negative transients, potentially causing failure or improper clamping behavior.
Does SMCG20AHE3/57T require special PCB layout considerations?
Yes - the SMCG20AHE3/57T must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve its rated 1500 W PPPM and 75 °C/W RθJA. Short, wide traces to ground and minimized loop area between anode/cathode paths are essential to preserve its sub-1 ns response time and prevent inductive voltage overshoot during surge events.
What does the "HE3" suffix signify in SMCG20AHE3/57T?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability standards. It distinguishes SMCG20AHE3/57T from industrial-grade "E3" variants and halogen-free "HM3" versions - confirming its suitability for automotive and high-reliability industrial deployments.
Can SMCG20AHE3/57T replace SMAJ20A in an existing design?
SMCG20AHE3/57T is not a drop-in replacement for SMAJ20A due to differing packages (DO-215AB vs. DO-214AC), thermal characteristics (75 vs. 110 °C/W RθJA), and surge capability (1500 W vs. 400 W PPPM). While both share 20 V VWM, substituting SMCG20AHE3/57T requires PCB layout revision and validation against higher-energy surge standards - it should only be adopted when enhanced protection level is explicitly required.
SMCG20AHE3/57T 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 46.3A
- 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)
SMCG20AHE3/57T FAQ
1.How can I place an order for SMCG20AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG20AHE3/57T 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 SMCG20AHE3/57T reliable?
The price and inventory of SMCG20AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG20AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG20AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG20AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG20AHE3/57T?
SMCG20AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG20AHE3/57T 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 SMCG20AHE3/57T?
For technical support, including SMCG20AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG20AHE3/57T requirements.
6.How does Aetrix verify that SMCG20AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG20AHE3/57T 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 SMCG20AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG20AHE3/57T?
All SMCG20AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG20AHE3/57T, 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 SMCG20AHE3/57T part is unused and in its original packaging.
Return procedure for SMCG20AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG20AHE3/57T Tags
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