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Vishay General Semiconductor - Diodes Division SMCG51CAHE3/57T
- Part No.:
- SMCG51CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG51CAHE3/57T.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,716
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Product details
Overview
SMCG51CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust ESD and surge protection on signal/power lines. It features a 51 V standoff voltage (VWM), 56.7–62.7 V breakdown range (VBR), 1500 W peak pulse power (10/1000 µs), <1 µA reverse leakage at VWM, and clamps to ≤82.4 V at 18.2 A IPPM. It is AEC-Q101 qualified and used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCG51CAHE3/57T datasheet, SMCG51CAHE3/57T pinout, SMCG51CAHE3/57T application, or SMCG51CAHE3/57T equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification status, and direct replacement guidance for automotive-grade TVS selection.
Technical Context
The SMCG51CAHE3/57T operates as a symmetrical bidirectional avalanche diode, with identical VBR min/max (56.7 V / 62.7 V) and clamping performance in both polarities. Its glass-passivated junction enables fast response (<1 ns) and stable breakdown under repetitive transients.
Rated for 1500 W peak pulse power (10/1000 µs waveform), it sustains 18.2 A IPPM while limiting voltage to 82.4 V - critical for protecting 48 V automotive CAN/LIN buses and industrial analog front-ends. Thermal design is supported by RθJL = 15 °C/W and RθJA = 75 °C/W on standard 8 mm × 8 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 48 V systems. |
| VBR (min/max) | 56.7 V / 62.7 V - guaranteed avalanche initiation range at 1 mA test current; ensures predictable turn-on across temperature and lot variation. |
| VC @ IPPM | 82.4 V @ 18.2 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - peak transient energy handling capacity; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) compliance with margin. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage at rated standoff; preserves signal integrity and minimizes standby power loss. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments and high-ambient industrial enclosures. |
| Package | SMCG (DO-215AB) - surface-mount gull-wing package with matte tin leads; compatible with automated SMT assembly and J-STD-002 solderability. |
Pinout & Package
SMCG51CAHE3/57T uses the SMCG (DO-215AB) package: a symmetrical, bidirectional surface-mount device with no polarity marking. Both terminals are electrically identical; neither is designated anode or cathode. The package features gull-wing leads, 0.220–0.245 inch body length, and 0.038–0.058 inch lead width per Vishay outline drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional Surge Path | Either terminal accepts transient energy in either polarity; no DC bias dependency - ideal for AC-coupled data lines like RS-485 or CAN. |
| Terminal 2 | Bidirectional Surge Path | Electrically identical to Terminal 1; completes low-inductance path for surge current diversion to ground or rail. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment I/O - meets stress test requirements for temperature cycling, HTRB, and ESD. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under humidity, thermal aging, and mechanical stress - critical for 15+ year automotive service life. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns - eliminates baking requirement and reduces manufacturing cost. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin for downstream ICs. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation required for automotive cabin modules and industrial safety-rated equipment. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceivers and MEMS pressure/temperature sensors connected to vehicle battery rails. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and chassis ground or supply rail to shunt ESD (IEC 61000-4-2) and load-dump surges (ISO 7637-2). Use Value: Clamps 18.2 A transients to ≤82.4 V, keeping protected transceiver inputs below absolute maximum ratings while maintaining AEC-Q101 reliability. |
Use Scenario: Safeguarding differential RS-485 nodes in factory automation PLCs exposed to motor switching noise and lightning-induced surges. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS on A/B bus pairs, leveraging symmetrical clamping to preserve differential signaling integrity. Use Value: 1500 W PPPM rating supports IEC 61000-4-5 4 kV/2 Ω testing; low capacitance (<100 pF) avoids signal edge degradation at 10 Mbps. |
| Consumer USB-C Port | Power Over Ethernet (PoE) PSE |
|
Use Scenario: ESD protection on USB-C CC, SBU, and VBUS lines in laptops and docking stations. IC Role / Device Role / Timing Role: Primary-level TVS on high-speed and power pins, placed immediately at connector to intercept ±15 kV contact discharge. Use Value: Sub-1 µA leakage at 51 V VWM prevents VBUS droop; fast response (<1 ns) prevents ESD-induced latch-up in USB PD controllers. |
Use Scenario: Secondary-side surge suppression on PoE-powered device (PD) input after the transformer, before DC-DC conversion. IC Role / Device Role / Timing Role: Bidirectional clamp across isolated DC output rails to absorb residual common-mode surges coupled through magnetics. Use Value: Withstands repeated 10/1000 µs transients up to 1500 W without parametric shift - extends field lifetime in outdoor telecom deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51CA | Same VWM (51 V), lower PPPM (400 W), SMA (DO-214AC) package - smaller footprint but higher RθJA (110 °C/W). | Limited to lower-energy transients (IEC 61000-4-2 only); unsuitable for ISO 7637-2 load dump or IEC 61000-4-5. | Select when board space is constrained and surge threat level is limited to ESD-only environments. |
| SMCJ51CA | Same VWM (51 V), higher PPPM (1500 W), larger SMC (DO-214AB) package - RθJA = 40 °C/W, but requires more PCB area. | Better thermal performance allows sustained surge duty cycles; preferred for high-reliability industrial power supplies. | Select when thermal management is critical and PCB layout permits larger 7.11 mm × 6.22 mm footprint. |
Compared with SMAJ51CA and SMCJ51CA, the SMCG51CAHE3/57T delivers identical 1500 W surge capability in a mid-size DO-215AB package with AEC-Q101 qualification - making it the optimal choice for space-constrained automotive and industrial designs requiring certified reliability.
Availability
SMCG51CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, consumer USB-C interface hardening, and Power over Ethernet (PoE) system safeguarding requiring stable component supply and long-term lifecycle assurance.
Supply support for SMCG51CAHE3/57T 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, automotive qualification, and high-volume manufacturability.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, bidirectional transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 or UL recognition.
FAQ
What is the clamping voltage of SMCG51CAHE3/57T at its rated peak pulse current?
The SMCG51CAHE3/57T clamps to a maximum of 82.4 V at its specified peak pulse current (IPPM) of 18.2 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for protected circuits.
Is SMCG51CAHE3/57T suitable for automotive applications?
Yes, SMCG51CAHE3/57T is AEC-Q101 qualified and explicitly listed in Vishay's documentation as meeting automotive stress test requirements. Its construction - including glass-passivated junction, MSL Level 1 rating, and UL 94 V-0 molding - supports deployment in engine control units, ADAS sensors, and infotainment systems where reliability under thermal and mechanical stress is mandatory.
Does SMCG51CAHE3/57T have polarity markings?
No, SMCG51CAHE3/57T is a bidirectional TVS diode and carries no polarity marking on the SMCG (DO-215AB) package. Both terminals are functionally identical and interchangeable - enabling flexible PCB layout for AC-coupled or floating signal lines such as CAN, RS-485, or audio interfaces without orientation constraints.
What is the maximum reverse leakage current for SMCG51CAHE3/57T at its standoff voltage?
At its 51 V standoff voltage (VWM), the SMCG51CAHE3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C, as specified in the Vishay datasheet. This ultra-low leakage preserves signal fidelity in high-impedance sensor paths and minimizes power loss in always-on automotive modules.
How does the SMCG51CAHE3/57T package compare thermally to SMAJ and SMCJ alternatives?
The SMCG51CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on standard 8 mm × 8 mm copper pads - positioned between the higher 110 °C/W of SMAJ51CA (SMA) and lower 40 °C/W of SMCJ51CA (SMC). This balance makes SMCG51CAHE3/57T suitable for moderate-duty-cycle surge events without requiring oversized heatsinking or sacrificing board space.
SMCG51CAHE3/57T 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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 18.2A
- 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)
SMCG51CAHE3/57T FAQ
1.How can I place an order for SMCG51CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG51CAHE3/57T 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 SMCG51CAHE3/57T reliable?
The price and inventory of SMCG51CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG51CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG51CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG51CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG51CAHE3/57T?
SMCG51CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG51CAHE3/57T 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 SMCG51CAHE3/57T?
For technical support, including SMCG51CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG51CAHE3/57T requirements.
6.How does Aetrix verify that SMCG51CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG51CAHE3/57T 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 SMCG51CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG51CAHE3/57T?
All SMCG51CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG51CAHE3/57T, 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 SMCG51CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCG51CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG51CAHE3/57T Tags
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