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Vishay General Semiconductor - Diodes Division SMCG51CA-E3/9AT
- Part No.:
- SMCG51CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG51CA-E3/9AT.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,860
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Product details
Overview
SMCG51CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the TRANSZORB® family, designed for robust overvoltage protection on signal and power lines. It features a 51 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 82.4 V at 18.2 A, and AEC-Q101 qualification for automotive-grade reliability. It is used to protect MOSFETs, sensor interfaces, and CAN/LIN bus lines against ESD and inductive switching transients.
For engineers reviewing the SMCG51CA-E3/9AT datasheet, SMCG51CA-E3/9AT pinout, SMCG51CA-E3/9AT application, or SMCG51CA-E3/9AT equivalent, this page delivers verified electrical parameters, package geometry, real-world protection use cases, and validated alternative parts - all aligned with Vishay's official 88457 specification revision (09-Jan-2024).
Technical Context
This device operates bidirectionally with symmetrical breakdown characteristics: minimum VBR = 56.7 V and maximum VBR = 62.7 V at 1 mA test current. Its low clamping ratio (VC/VWM ≈ 1.62) and fast response time ensure effective suppression of 10/1000 µs surge waveforms without compromising downstream IC integrity.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The SMCG (DO-215AB) package supports automated SMT placement and meets UL 94 V-0 flammability rating, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 56.7 V / 62.7 V - Breakdown occurs within this band at 1 mA; ensures predictable turn-on during transients. |
| VC @ IPPM | 82.4 V at 18.2 A - Clamped voltage under 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; enables survival of high-energy transients like ISO 7637-2 Pulse 5a. |
| ID @ VWM | 1.0 µA - Reverse leakage at rated stand-off voltage; negligible loading on low-power sensor or communication lines. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood automotive and industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM. |
Pinout & Package
SMCG51CA-E3/9AT uses the SMCG (DO-215AB) surface-mount package: a low-profile, gull-wing leaded case measuring 7.87 mm × 9.64 mm × 2.41 mm (L × W × H), with cathode/anode terminals on opposite ends and no polarity marking for bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current from either direction; connects to line being protected (e.g., CAN_H or LIN bus). |
| Cathode | Transient current exit point (bidirectional) | Completes surge path to ground or return rail; requires low-inductance PCB layout for optimal clamping performance. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift in harsh environments. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without moisture-related popcorning or delamination risks. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), critical for protecting high-speed interfaces. |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for automotive cabin and industrial control enclosures. |
| Matte tin plating (J-STD-002 compliant) | Guarantees reliable solder wetting and intermetallic formation across multiple reflow cycles. |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting analog output sensors (e.g., pressure, temperature) in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and chassis ground to clamp ±100 V transients. Use Value: Prevents latch-up or permanent damage to 12-bit ADC inputs while maintaining <1.0 µA leakage at 51 V bias. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair in body control modules subjected to ISO 16750-2 jump-start pulses. IC Role / Device Role / Timing Role: Two SMCG51CA-E3/9AT devices deployed in back-to-back configuration across CAN_H–GND and CAN_L–GND. Use Value: Limits clamped voltage to ≤82.4 V during 1500 W surges, preserving signal integrity and meeting ISO 11898-2 EMC immunity thresholds. |
| Industrial I/O Module Protection | Telecom Line Interface Guarding |
|
Use Scenario: Shielding 24 V DC digital input channels in PLC modules from field-wiring induced transients during relay coil de-energization. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between input terminal and common return, absorbing 10/1000 µs surges up to 18.2 A. Use Value: Maintains functional safety by preventing false triggering or microcontroller reset due to >1 kV transients on long cable runs. |
Use Scenario: Protecting RS-485 transceivers in base station remote units from lightning-induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Bidirectional clamping device installed on each data line (A/B) referenced to local ground plane. Use Value: Withstands repeated 1500 W surges while holding capacitance below 100 pF at 0 V bias - avoiding signal edge degradation at 10 Mbps. |
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) and PPPM (1500 W), but SMA (DO-214AC) package; RθJA = 85 °C/W vs. 75 °C/W for SMCG. | Larger footprint (4.3 mm × 2.6 mm vs. 7.87 mm × 9.64 mm); less thermal mass reduces surge endurance margin in high-duty-cycle scenarios. | Select SMAJ51CA only when board space constraints prohibit DO-215AB or when legacy SMA footprint reuse is required. |
| 1.5KE51CA | Higher VBR tolerance (±5 % vs. ±5.5 %), same VWM/VC, but axial-leaded DO-201AD package; not SMT-compatible. | Requires through-hole assembly and manual rework; unsuitable for automated production or vibration-prone automotive mounts. | Choose 1.5KE51CA only for prototyping, repair, or non-automated low-volume industrial controls where SMT is unavailable. |
Compared with SMAJ51CA and 1.5KE51CA, SMCG51CA-E3/9AT delivers superior thermal performance in SMT layouts, AEC-Q101 validation for automotive deployment, and optimized gull-wing geometry for high-yield reflow - making it the preferred choice for volume production of ruggedized electronics.
Availability
SMCG51CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN/LIN bus protection, and industrial I/O modules requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG51CA-E3/9AT 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 engineered specifically for high-energy transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-clamp performance, and robust SMT packaging for mission-critical signal and power line protection.
FAQ
What is the clamping voltage of SMCG51CA-E3/9AT under a 10/1000 µs surge?
The SMCG51CA-E3/9AT clamps to 82.4 V when subjected to its rated peak pulse current of 18.2 A using 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 protected circuits.
Is SMCG51CA-E3/9AT suitable for automotive applications?
Yes, SMCG51CA-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its construction - including glass-passivated junction, MSL Level 1 reflow compatibility, and operation up to +150 °C - meets stringent requirements for engine bay, body control, and ADAS subsystems.
Does SMCG51CA-E3/9AT have polarity markings on the package?
No, SMCG51CA-E3/9AT is a bidirectional TVS diode and carries no polarity marking on the SMCG (DO-215AB) case. Unlike unidirectional variants, it functions identically regardless of orientation - simplifying layout and eliminating risk of reverse installation.
What is the maximum reverse leakage current of SMCG51CA-E3/9AT at its VWM?
At its 51 V stand-off voltage (VWM), SMCG51CA-E3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 µA at TA = 25 °C. This ultra-low leakage preserves signal integrity and battery life in always-on sensor and telemetry circuits.
Which tape-and-reel format does SMCG51CA-E3/9AT ship in?
SMCG51CA-E3/9AT ships in 13-inch diameter plastic tape and reel with a base quantity of 3500 units per reel (ordering code suffix "9AT"). This format supports high-speed pick-and-place assembly and aligns with IPC-7351B land pattern recommendations for DO-215AB.
SMCG51CA-E3/9AT 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG51CA-E3/9AT FAQ
1.How can I place an order for SMCG51CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG51CA-E3/9AT 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 SMCG51CA-E3/9AT reliable?
The price and inventory of SMCG51CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG51CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG51CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG51CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG51CA-E3/9AT?
SMCG51CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG51CA-E3/9AT 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 SMCG51CA-E3/9AT?
For technical support, including SMCG51CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG51CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG51CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG51CA-E3/9AT 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 SMCG51CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG51CA-E3/9AT?
All SMCG51CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG51CA-E3/9AT, 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 SMCG51CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG51CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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