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Vishay General Semiconductor - Diodes Division SMCG51AHE3/57T
- Part No.:
- SMCG51AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG51AHE3/57T.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,168
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Product details
Overview
SMCG51AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 51 V stand-off voltage (VWM), 56.7–62.7 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 18.2 A peak pulse current (IPPM), and clamps to ≤82.4 V at rated surge - deployed in automotive power line and sensor interface protection.
For engineers reviewing the SMCG51AHE3/57T datasheet, SMCG51AHE3/57T pinout, SMCG51AHE3/57T application, or SMCG51AHE3/57T equivalent, this AEC-Q101 qualified TVS offers verified bidirectional-capable packaging, low clamping ratio (VC/VBR ≈ 1.31), and MSL Level 1 reflow compatibility - critical for high-reliability automotive and industrial PCB designs requiring stable surge immunity without layout redesign.
Technical Context
The SMCG51AHE3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering fast response (<1 ns) to transient events such as ESD, load dump, and inductive switching spikes. Its unidirectional polarity uses cathode-band marking and exhibits 1.0 µA max reverse leakage at 51 V, enabling low-power standby integrity in always-on systems.
Thermally, it sustains 150 °C maximum junction temperature with RθJA = 75 °C/W and RθJL = 15 °C/W, and handles 200 A non-repetitive forward surge (8.3 ms half-sine). The DO-215AB package supports automated SMT placement and meets UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC signal margin in protected circuit. |
| VBR (min/max) | 56.7 V / 62.7 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across process variation and temperature. |
| VC @ IPPM | ≤82.4 V at 18.2 A - Clamping voltage under 10/1000 µs surge; determines maximum stress on downstream ICs like MCUs or transceivers. |
| PPPM | 1500 W - Peak pulse power handling capability; enables protection against ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems. |
| IR @ VWM | ≤1.0 µA - Reverse leakage at rated stand-off; preserves low quiescent current in battery-powered sensor nodes. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TCT, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded case with 0.220–0.245 inch body length, matte tin-plated terminals, and polarity indicated by cathode band. Complies with J-STD-002 solderability and JESD22-B102 whisker resistance (Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line (e.g., CAN_H or LIN bus) | Accepts surge current during clamping; must be routed with low-inductance trace to ground reference. |
| Cathode | Current exit terminal in forward bias; marked with band; tied to system ground or low-impedance return path | Serves as clamping reference node; requires direct connection to ground plane to minimize VC rise during surge. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensors - eliminates need for additional qualification testing. |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature; prevents moisture-induced parameter drift in humid or condensing environments. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients - critical for protecting 3.3 V or 5 V logic interfaces without external series impedance. |
| MSL Level 1 (260 °C peak) | Enables single-pass reflow assembly without pre-baking; reduces manufacturing cost and avoids moisture-related popcorn failure. |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for enclosed automotive modules and industrial control cabinets. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rails in vehicle infotainment head units against ISO 7637-2 load dump pulses up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery input and DC/DC converter input stage. Use Value: Limits transient voltage to ≤82.4 V, preventing damage to 65 V-rated input MOSFETs and maintaining system uptime during cold-cranking events. |
Use Scenario: Shielding analog output lines of pressure sensors in factory automation PLC I/O modules from motor drive noise coupling. IC Role / Device Role / Timing Role: Standoff-mode protector on 4–20 mA current loop outputs, grounded at receiver end. Use Value: Maintains <1 µA leakage at 51 V, avoiding offset error in precision current-to-voltage conversion while surviving 1 kV EFT bursts. |
| Automotive CAN Bus Node Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding CAN transceiver PHY pins (CAN_H/CAN_L) in telematics control units exposed to battery disconnect transients. IC Role / Device Role / Timing Role: Secondary-level TVS paired with common-mode choke; placed adjacent to transceiver package. Use Value: Responds in <1 ns to 100 V/µs edges, clamping differential surges to <85 V - preserving CAN FD signal integrity up to 5 Mbps. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home vacuum cleaners during PWM commutation. IC Role / Device Role / Timing Role: Flyback diode replacement with superior surge energy absorption and tighter voltage clamping than standard rectifiers. Use Value: Handles 200 A single-pulse surge (8.3 ms), eliminating need for oversized freewheeling diodes while reducing board area by 40% vs. SMA packages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-E3/57T | Same VWM (51 V) and PPPM (400 W), but lower power rating (400 W vs. 1500 W); SMA package (DO-214AC), smaller footprint. | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for load dump or ISO 7637-2 Pulse 5a. | Select when space-constrained and surge threat level is limited to human-body-model ESD or low-energy switching noise. |
| SMCJ51AHE3/57T | Identical VWM (51 V), higher PPPM (1500 W), same DO-215AB package; differs in thermal resistance (RθJA = 40 °C/W vs. 75 °C/W) and AEC-Q101 status (not qualified). | Higher thermal performance allows sustained operation at elevated ambient temperatures; lacks automotive qualification documentation. | Choose for industrial applications requiring higher thermal margin where AEC-Q101 compliance is not mandated. |
Compared with SMAJ51A-E3/57T and SMCJ51AHE3/57T, the SMCG51AHE3/57T uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and DO-215AB mechanical robustness - making it the only option validated for under-hood automotive deployment with full load-dump immunity.
Availability
SMCG51AHE3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and consumer appliance motor drive circuits requiring stable component supply with guaranteed long-term manufacturability.
Supply support for SMCG51AHE3/57T 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series was engineered specifically for high-energy transient suppression in automotive and industrial environments, prioritizing AEC-Q101 compliance, low clamping ratio, and robust SMT manufacturability in demanding thermal and mechanical conditions.
FAQ
What is the clamping voltage of the SMCG51AHE3/57T at its rated peak pulse current?
The SMCG51AHE3/57T has a maximum clamping voltage (VC) of 82.4 V when subjected to its rated 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 downstream components in the protected circuit.
Is the SMCG51AHE3/57T suitable for bidirectional transient protection?
No - the SMCG51AHE3/57T is a unidirectional TVS diode, as indicated by the "A" suffix and cathode-band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMCG51CA); the SMCG51AHE3/57T conducts only in reverse breakdown and must be oriented with cathode toward the protected line's higher potential side.
Does the SMCG51AHE3/57T require derating at elevated ambient temperatures?
Yes - the SMCG51AHE3/57T must be derated above TA = 25 °C per Figure 2 in the datasheet. At 85 °C ambient, its peak pulse power drops to approximately 750 W (50% of 1500 W), and its 18.2 A IPPM rating decreases proportionally. Thermal design must account for RθJA = 75 °C/W and mounting on 8.0 mm × 8.0 mm copper pads per specification.
What does the "HE3" suffix signify in SMCG51AHE3/57T?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability. It distinguishes the SMCG51AHE3/57T from industrial-grade "E3" variants (non-AEC-Q101) and halogen-free "HM3" versions, confirming its suitability for automotive production programs requiring both environmental compliance and automotive reliability validation.
Can the SMCG51AHE3/57T replace a standard rectifier diode in flyback protection?
The SMCG51AHE3/57T is not intended as a general-purpose rectifier. While it conducts in forward bias, its primary function is transient clamping - it has a specified VF of 3.5 V at 100 A (unidirectional only), significantly higher than Schottky or fast recovery rectifiers. Use only where its 1500 W surge absorption and precise clamping behavior are required, not for steady-state power rectification.
SMCG51AHE3/57T 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):
- 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)
SMCG51AHE3/57T FAQ
1.How can I place an order for SMCG51AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG51AHE3/57T 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 SMCG51AHE3/57T reliable?
The price and inventory of SMCG51AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG51AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG51AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG51AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG51AHE3/57T?
SMCG51AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG51AHE3/57T 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 SMCG51AHE3/57T?
For technical support, including SMCG51AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG51AHE3/57T requirements.
6.How does Aetrix verify that SMCG51AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG51AHE3/57T 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 SMCG51AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG51AHE3/57T?
All SMCG51AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG51AHE3/57T, 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 SMCG51AHE3/57T part is unused and in its original packaging.
Return procedure for SMCG51AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG51AHE3/57T Tags
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