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Vishay General Semiconductor - Diodes Division SMCG33AHE3/9AT
- Part No.:
- SMCG33AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG33AHE3/9AT.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,633
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Product details
Overview
SMCG33AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, with a standoff voltage of 33 V, breakdown voltage range of 36.7–40.6 V at 1 mA, peak pulse power rating of 1500 W (10/1000 µs), clamping voltage of 53.3 V at 28.1 A, and AEC-Q101 qualification for automotive-grade reliability. It protects MOSFETs and signal lines in engine control units against inductive switching transients.
For engineers reviewing the SMCG33AHE3/9AT datasheet, SMCG33AHE3/9AT pinout, SMCG33AHE3/9AT application, or SMCG33AHE3/9AT equivalent, this page delivers verified electrical parameters, mechanical package details, real-world protection use cases, and validated alternative parts - all aligned to Vishay's official 88457 specification document dated 09-Jan-2024.
Technical Context
This TVS diode operates as a unidirectional clamping device with glass-passivated junction and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges. Its thermal resistance (RθJA = 75 °C/W) and junction temperature limit (TJ = 150 °C) support sustained operation under repeated 10/1000 µs pulses on standard 8.0 mm × 8.0 mm copper pads.
The device complies with ANSI/IEEE C62.35 for surge protection standards and meets JESD201 Class 2 whisker resistance. Its matte tin-plated leads are solderable per J-STD-002 and JESD22-B102, and its DO-215AB outline conforms to UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum reverse working voltage before leakage exceeds 1 µA; defines safe operating margin below breakdown. |
| VBR min/max | 36.7 V / 40.6 V at IT = 1 mA - Confirmed breakdown threshold range; ensures consistent clamping initiation across production lots. |
| VC @ IPPM | 53.3 V at 28.1 A - Clamped voltage during full 1500 W surge; determines maximum stress imposed on protected downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 µs waveform; validates robustness against ISO 7637-2 Pulse 1/2a/5a events. |
| IFSM | 200 A - Non-repetitive forward surge current (8.3 ms half-sine); supports protection of high-current power switches like ignition drivers. |
| TJ max | 150 °C - Maximum junction temperature; enables deployment in under-hood automotive environments without derating penalties. |
| Package | SMCG (DO-215AB) - Surface-mount gull-wing package with 3.17 mm lead pitch; optimized for automated placement and reflow compatibility. |
Pinout & Package
SMCG33AHE3/9AT uses the SMCG (DO-215AB) package: a surface-mount gull-wing outline with cathode band marking on the unidirectional variant. Leads are matte tin-plated and compliant with J-STD-002 solderability requirements. Mechanical dimensions match Vishay's documented DO-215AB footprint (0.220–0.245 inch body width, 0.115–0.125 inch lead length).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-side reference in unidirectional clamp configurations; enables surge current path during overvoltage events. |
| Cathode | Current exit terminal; marked with band | Connected to protected line (e.g., 33 V rail or gate drive trace); defines polarity-sensitive clamping direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain and chassis systems; includes temperature cycling, HTRB, and ESD testing per stress test plan. |
| Glass passivated chip junction | Ensures stable leakage performance and long-term reliability under humidity and thermal cycling; eliminates risk of junction corrosion. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients; contributes directly to the 53.3 V clamping performance at 28.1 A. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates bake-out requirement prior to SMT placement. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation suitable for enclosed automotive modules where fire safety compliance is mandatory. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Suppresses load-dump and inductive kickback spikes on 33 V supply rails feeding microcontrollers and analog sensors in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 33 V rail and ground, clamping transients within 1 ns to protect downstream LDOs and CAN transceivers. Use Value: Maintains system uptime by preventing latch-up or permanent damage to 33 V domain ICs during alternator regulation faults or solenoid de-energization. |
Use Scenario: Shields IGBT gate drivers from Miller-induced voltage spikes during high dv/dt switching in HVAC and pump inverters. IC Role / Device Role / Timing Role: Mounted across gate-to-emitter terminals of 600 V IGBTs, limiting gate voltage excursion to ≤53.3 V during turn-off. Use Value: Prevents false triggering and gate oxide degradation, extending IGBT lifetime in 20 kHz PWM motor control stages. |
| Telecom Power Interface Protection | Automotive Body Control Module (BCM) |
Use Scenario: Guards PoE-powered Ethernet PHY interfaces against lightning-induced surges entering via RJ45 connectors. IC Role / Device Role / Timing Role: Placed on 33 V bias rail feeding Ethernet magnetics and PHY ICs; operates in parallel with common-mode chokes. Use Value: Enables compliance with IEC 61000-4-5 Level 3 (1 kV line-earth) without requiring additional series impedance or filtering complexity. |
Use Scenario: Protects LIN bus transceivers and window lift motor drivers from battery reversal and jump-start transients in door modules. IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-LIN line; clamps negative-going spikes to −0.7 V and positive surges to 53.3 V. Use Value: Eliminates need for discrete Zener + series resistor networks, reducing BOM count while maintaining AEC-Q100 Grade 2 temperature range operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Same VWM (33 V), lower PPPM (400 W), SMA (DO-214AC) package with higher RθJA (110 °C/W) | Limited to lower-energy surges; unsuitable for ISO 7637-2 Pulse 5a or automotive load-dump scenarios | Select when cost sensitivity outweighs surge robustness and board space allows larger thermal pad area. |
| SMCJ33AHE3/9AT | Identical VWM, VBR, and VC; same DO-215AB package but rated for 3000 W PPPM | Supports higher-energy threats (e.g., 10/1000 µs surges >1500 W) without derating; requires identical PCB layout | Choose for future-proofing against evolving OEM surge test requirements or multi-pulse stress conditions. |
Compared with SMAJ33A-E3/57T, SMCG33AHE3/9AT delivers 275 % higher peak pulse power in the same footprint; versus SMCJ33AHE3/9AT, it trades 50 % lower surge capacity for tighter parametric binning and reduced unit cost in volume automotive programs.
Availability
SMCG33AHE3/9AT is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drives, telecom interface protection, and body electronics requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMCG33AHE3/9AT 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and testing infrastructure supporting automotive, industrial, and computing markets.
The SMCG series was developed specifically for high-reliability surface-mount transient suppression in automotive under-hood and chassis applications, emphasizing AEC-Q101 qualification, low-profile packaging, and repeatable clamping performance across temperature.
FAQ
What is the clamping voltage of SMCG33AHE3/9AT at its rated peak pulse current?
The SMCG33AHE3/9AT has a maximum clamping voltage (VC) of 53.3 V at its peak pulse current (IPPM) of 28.1 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCG33AHE3/9AT maintains this clamping performance due to its low incremental surge resistance and glass-passivated junction structure.
Is SMCG33AHE3/9AT suitable for bidirectional transient suppression?
No, SMCG33AHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the SMCG33CA variant, which provides symmetrical clamping in both polarities. Using SMCG33AHE3/9AT in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect downstream components. Always verify polarity designation before layout integration.
What does the "HE3/9AT" suffix indicate in SMCG33AHE3/9AT?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification, while "9AT" specifies packaging in a 13-inch diameter plastic tape-and-reel format containing 3500 units. This differs from "57T" variants (7-inch reel, 850 units) and confirms the part meets automotive reliability standards and automated assembly requirements. The SMCG33AHE3/9AT is not halogen-free; that variant uses the "HM3" suffix instead.
How does SMCG33AHE3/9AT compare to SMAJ33A in terms of thermal performance?
SMCG33AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on standard 8.0 mm × 8.0 mm copper pads, significantly lower than SMAJ33A's 110 °C/W in the SMA package. This 32 % improvement enables higher sustained power dissipation and better stability during repetitive surge events. The SMCG33AHE3/9AT's DO-215AB gull-wing leads also provide superior solder joint reliability compared to SMA's flat leads under thermal cycling stress.
Can SMCG33AHE3/9AT be used in place of SMCG33A-E3/9AT?
Yes - SMCG33AHE3/9AT and SMCG33A-E3/9AT share identical electrical specifications (VWM, VBR, VC, PPPM) and mechanical form factor, differing only in qualification level: "HE3" adds AEC-Q101 certification while "E3" is industrial-grade. Both use the same DO-215AB package and RoHS-compliant materials. The SMCG33AHE3/9AT is fully backward-compatible and preferred for automotive designs requiring certified reliability.
SMCG33AHE3/9AT 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCG33AHE3/9AT FAQ
1.How can I place an order for SMCG33AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG33AHE3/9AT 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 SMCG33AHE3/9AT reliable?
The price and inventory of SMCG33AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG33AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG33AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG33AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG33AHE3/9AT?
SMCG33AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG33AHE3/9AT 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 SMCG33AHE3/9AT?
For technical support, including SMCG33AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG33AHE3/9AT requirements.
6.How does Aetrix verify that SMCG33AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG33AHE3/9AT 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 SMCG33AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG33AHE3/9AT?
All SMCG33AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG33AHE3/9AT, 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 SMCG33AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG33AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG33AHE3/9AT Tags
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