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Vishay General Semiconductor - Diodes Division SMCG33CAHE3/9AT
- Part No.:
- SMCG33CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG33CAHE3/9AT.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,800
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Product details
Overview
SMCG33CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 33 V stand-off voltage (VWM), 53.3 V clamping voltage (VC) at 28.1 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor signal lines, industrial I/O ports, and telecom interface protection.
For engineers reviewing the SMCG33CAHE3/9AT datasheet, SMCG33CAHE3/9AT pinout, SMCG33CAHE3/9AT application, or SMCG33CAHE3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped surge protector using an avalanche breakdown mechanism, with symmetrical breakdown voltage (VBR) of 36.7 V (min) to 40.6 V (max) in both directions. Its low incremental surge resistance and fast response time enable effective suppression of ESD, lightning-induced transients, and inductive switching spikes without latch-up or degradation under repetitive stress.
Thermally, it delivers 6.5 W power dissipation at TA = 50 °C with RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation across -55 °C to +150 °C junction temperature range. The matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and the device is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 36.7 V / 40.6 V - symmetric breakdown threshold in both directions, ensuring balanced transient response |
| VC @ IPPM | 53.3 V @ 28.1 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling capability, defining surge energy absorption capacity |
| TJ max. | +150 °C - maximum junction temperature, enabling use in under-hood automotive environments |
| MSL Level | Level 1 per J-STD-020 - no floor life limitation; supports standard reflow without baking |
| AEC-Q101 | Qualified - validated for automotive applications including engine control, ADAS sensors, and infotainment interfaces |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with 8.0 mm × 8.0 mm thermal pad footprint, UL 94 V-0 rated molding compound, and cathode/anode terminals unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (direction-agnostic) | One terminal of symmetrical PN junction; accepts surge current from either polarity |
| Cathode | Transient current exit (direction-agnostic) | Second terminal of symmetrical PN junction; completes clamping path regardless of surge polarity |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| Glass passivated junction | Ensures stable VBR over lifetime and high reliability in humid or thermally cycled environments |
| AEC-Q101 qualification | Validates performance for automotive applications including powertrain, chassis, and body electronics |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| MSL Level 1 rating | Eliminates pre-reflow baking requirements, reducing manufacturing cost and cycle time |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector or IC input pins to limit transient voltage before it reaches protected ICs. Use Value: Maintains signal integrity under ISO 16750-2 load dump (up to 120 V) and IEC 61000-4-2 ESD (±15 kV air), preventing latch-up or damage to 3.3 V/5 V sensor interfaces. | Use Scenario: Safeguarding digital and analog I/O channels of programmable logic controllers against field-wiring surges and ground loop transients. IC Role / Device Role / Timing Role: Front-end transient suppressor on isolated or non-isolated I/O terminals, coordinated with upstream fusing and filtering. Use Value: Withstands 1500 W surges while holding clamped voltage below 53.3 V, protecting 24 V-rated microcontrollers and ADC front-ends from permanent failure. |
| Telecom Interface Protection | Consumer Power Adapter Input Protection |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and PoE injectors from induced lightning surges and hot-plug transients. IC Role / Device Role / Timing Role: Primary surge arrestor on differential data lines or DC bias rails, placed before common-mode chokes and isolation barriers. Use Value: Symmetric clamping ensures equal protection on both line polarities, critical for full-duplex communication links exposed to ±1 kV surge per IEC 61000-4-5. | Use Scenario: Input-stage overvoltage protection for AC/DC adapters and USB PD chargers subjected to mains-borne transients and capacitor discharge events. IC Role / Device Role / Timing Role: Secondary-level TVS after primary MOV/fuse, absorbing residual surges that bypass upstream protection. Use Value: Fast 10/1000 µs response and 53.3 V clamping prevent overvoltage stress on bridge rectifiers and primary-side controllers during EN 61000-4-4 EFT bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA-E3/57T | Same VWM (33 V) and VC (53.3 V), but lower PPPM (400 W) and smaller SMA (DO-214AC) package | Limited to lower-energy transients; unsuitable for automotive load dump or industrial 4–20 mA loop protection | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 only |
| SMCJ33CAHE3/9AT | Same VWM (33 V), higher PPPM (3000 W), larger SMC (DO-214AB) package, identical AEC-Q101 qualification | Supports higher surge currents (57.1 A) and longer duration transients, e.g., ISO 7637-2 Pulse 5a | Choose for mission-critical automotive or industrial systems requiring extended surge margin |
Compared with SMAJ33CA-E3/57T, SMCG33CAHE3/9AT delivers 3.75× higher peak pulse power and superior thermal dissipation via its DO-215AB footprint; versus SMCJ33CAHE3/9AT, it trades 2× lower PPPM for 30 % smaller PCB area and identical AEC-Q101 compliance - optimizing space-constrained automotive modules.
Availability
SMCG33CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom interface surge suppression requiring stable component supply, AEC-Q101 traceability, and 13" tape-and-reel delivery for high-volume SMT production.
Supply support for SMCG33CAHE3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, precision, and automotive-grade qualification.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy bidirectional surge protection in space-constrained, thermally demanding automotive and industrial applications.
FAQ
What does the 'CA' suffix indicate in SMCG33CAHE3/9AT?
The 'CA' suffix denotes a bidirectional configuration - meaning SMCG33CAHE3/9AT provides symmetrical clamping in both forward and reverse directions, with identical breakdown (36.7–40.6 V) and clamping (53.3 V) characteristics. This eliminates polarity marking on the device and enables use on AC-coupled or floating signal paths where voltage transients may swing positive or negative relative to ground.
Is SMCG33CAHE3/9AT suitable for automotive applications?
Yes, SMCG33CAHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor interfaces, and infotainment systems. Its -55 °C to +150 °C operating range, MSL Level 1 reflow compatibility, and validation against load dump (ISO 16750-2) and ESD (IEC 61000-4-2) make it appropriate for under-hood and cabin-mounted electronics where reliability under thermal and electrical stress is critical.
How does the SMCG (DO-215AB) package compare to SMA (DO-214AC) in thermal performance?
The SMCG (DO-215AB) package used by SMCG33CAHE3/9AT offers lower thermal resistance than SMA: RθJA = 75 °C/W versus ~100–120 °C/W for SMA, due to larger copper pad area (8.0 mm × 8.0 mm vs. 5.5 mm × 5.5 mm) and enhanced leadframe thermal conduction. This allows SMCG33CAHE3/9AT to sustain higher average power (6.5 W at TA = 50 °C) and survive repeated surges without thermal runaway - especially important in automotive and industrial environments.
What is the significance of the 'HE3' suffix in SMCG33CAHE3/9AT?
The 'HE3' suffix indicates RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from industrial-grade 'E3' variants. SMCG33CAHE3/9AT meets automotive reliability standards, including extended temperature cycling, humidity testing, and mechanical shock requirements, and carries Vishay's material categorization per doc# 99912 for compliance reporting in Tier 1 automotive BOMs.
Can SMCG33CAHE3/9AT be used in place of a unidirectional TVS like SMCG33AHE3/9AT?
No - SMCG33CAHE3/9AT is strictly bidirectional and lacks polarity marking, whereas SMCG33AHE3/9AT is unidirectional with cathode band identification and asymmetric behavior (e.g., forward conduction at ~3.5 V). Substituting SMCG33CAHE3/9AT for SMCG33AHE3/9AT in DC-biased circuits risks unintended forward conduction or inadequate clamping on one polarity; always verify circuit topology and transient directionality before replacement.
SMCG33CAHE3/9AT 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 28.1A
- 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)
SMCG33CAHE3/9AT FAQ
1.How can I place an order for SMCG33CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG33CAHE3/9AT 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 SMCG33CAHE3/9AT reliable?
The price and inventory of SMCG33CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG33CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG33CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG33CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG33CAHE3/9AT?
SMCG33CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG33CAHE3/9AT 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 SMCG33CAHE3/9AT?
For technical support, including SMCG33CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG33CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG33CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG33CAHE3/9AT 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 SMCG33CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG33CAHE3/9AT?
All SMCG33CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG33CAHE3/9AT, 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 SMCG33CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG33CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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