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Vishay General Semiconductor - Diodes Division SMCG43AHE3/9AT
- Part No.:
- SMCG43AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG43AHE3/9AT.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,761
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Product details
Overview
SMCG43AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 21.6 A peak pulse current (IPPM) under 10/1000 µs waveform, and clamps to ≤69.4 V at IPPM - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCG43AHE3/9AT datasheet, SMCG43AHE3/9AT pinout, SMCG43AHE3/9AT application, or SMCG43AHE3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-215AB mechanical layout, clamping performance under surge conditions, and direct alternatives for ESD/surge protection design-in.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable avalanche behavior and low incremental surge resistance. Its 1500 W PPPM rating is validated per 10/1000 µs waveform with derating above 25 °C ambient, and thermal resistance is specified at RθJA = 75 °C/W on 8.0 mm × 8.0 mm copper pads.
The device meets AEC-Q101 stress testing requirements for automotive applications and complies with UL 497B recognition (QVGQ2, E136766). It exhibits <1.0 µA reverse leakage at VWM and maintains clamping voltage ≤69.4 V up to its rated IPPM - enabling reliable protection of 48 V nominal systems against ISO 7637-2 pulses and IEC 61000-4-5 surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before conduction begins; defines system rail compatibility (e.g., 48 V automotive supply) |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - guaranteed avalanche onset range; ensures predictable turn-on margin above VWM |
| VC @ IPPM | ≤69.4 V at IPPM = 21.6 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure |
| PPPM | 1500 W - peak pulse power handling capability; supports high-energy transients like load dump or inductive switching |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at stand-off voltage; minimizes standby power loss and avoids false triggering |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures |
| Package | SMCG (DO-215AB) - low-profile SMD outline with 0.31" × 0.31" pad footprint; optimized for automated placement and reflow soldering |
Pinout & Package
SMCG43AHE3/9AT uses the SMCG (DO-215AB) surface-mount package: a dual-leaded, gull-wing configuration with cathode band marking on the anode-side end. The package measures 7.87 mm × 3.17 mm × 2.41 mm (L × W × H), features matte tin-plated leads compliant with J-STD-002, and meets MSL Level 1 per J-STD-020 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to system ground or low-side reference | Enables unidirectional clamping from cathode to anode; must be tied to lowest potential node in protected path |
| Cathode | Current exit terminal during reverse-biased clamping; connected to protected line (e.g., CAN_H, 48 V rail) | Acts as the surge-sensing node; voltage rise above VBR triggers avalanche conduction to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for engine control, ADAS, and body electronics |
| Glass passivated junction | Ensures stable, repeatable avalanche characteristics over lifetime and across temperature; eliminates parameter drift due to moisture or contamination |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients; critical for protecting MOSFET gates and microcontroller I/O pins |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics for high-volume SMT lines |
| UL 497B recognized (QVGQ2) | Meets safety standards for telecom and industrial protectors; enables use in certified end-equipment without additional system-level testing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed control modules from load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V rail and chassis ground to clamp surges up to 1500 W. Use Value: Limits rail voltage to ≤69.4 V during 21.6 A surge, preventing damage to DC-DC converters and MCU power supplies. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) in factory automation sensors exposed to EFT and surge. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) clamping device mounted at connector interface to absorb fast transients before reaching ADC input. Use Value: Maintains signal integrity with sub-µA leakage at 43 V stand-off while responding in <1 ns to clamp induced spikes. |
| Telecom Interface Protection | OBD-II Diagnostic Port Protection |
Use Scenario: Shielding RS-485 transceiver I/O pins in base station backhaul equipment from lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable family member (though SMCG43AHE3/9AT is unidirectional) used in conjunction with series impedance for common-mode suppression. Use Value: Delivers 1500 W surge handling with ≤69.4 V clamping - meeting IEC 61000-4-5 Level 4 requirements when properly laid out. |
Use Scenario: Hardening OBD-II data lines (CAN_H/CAN_L) against coupling from 12 V ignition circuits and jump-start events. IC Role / Device Role / Timing Role: Unidirectional TVS on each CAN line referenced to vehicle ground, leveraging AEC-Q101 qualification for under-dash deployment. Use Value: Survives repeated 10/1000 µs surges up to 21.6 A while maintaining <1 µA leakage - ensuring diagnostic communication remains functional post-event. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/57T | Same VWM (43 V), lower PPPM (400 W), SMA (DO-214AC) package - 30% smaller footprint, higher RθJA (105 °C/W) | Better suited for space-constrained consumer PCBs; insufficient for automotive load dump where 1500 W is required | Select SMCG43AHE3/9AT when 1500 W surge handling and AEC-Q101 compliance are mandatory; choose SMAJ43A-E3/57T only for cost-sensitive, non-automotive 43 V protection |
| SMCJ43AHE3/9AT | Identical VWM, VBR, and PPPM (1500 W); same AEC-Q101 qualification; larger SMC (DO-214AB) package with higher thermal mass | Offers superior thermal dissipation (RθJA ≈ 50 °C/W) but requires 40% more board area than SMCG | Prefer SMCG43AHE3/9AT for high-density automotive modules where DO-215AB's compact size and proven reflow yield outweigh marginal thermal advantage of SMC |
Compared with SMAJ43A-E3/57T and SMCJ43AHE3/9AT, SMCG43AHE3/9AT uniquely balances 1500 W surge capability, AEC-Q101 qualification, and minimal DO-215AB footprint - making it optimal for next-generation 48 V automotive ECUs where board space and reliability are co-constrained.
Availability
SMCG43AHE3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and OBD-II diagnostic port surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG43AHE3/9AT 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series was developed specifically for high-power, space-constrained transient protection in automotive and industrial environments - combining AEC-Q101 qualification, UL recognition, and DO-215AB manufacturability into a single platform.
FAQ
What is the clamping voltage of SMCG43AHE3/9AT at its rated peak pulse current?
The SMCG43AHE3/9AT clamps to a maximum of 69.4 V at its rated peak pulse current (IPPM) of 21.6 A under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 0.31" × 0.31" copper pads per JEDEC standards and represents the upper limit of voltage seen by downstream circuitry during surge events - critical for validating safe operating margins of protected ICs and MOSFETs in the SMCG43AHE3/9AT design.
Is SMCG43AHE3/9AT suitable for automotive applications?
Yes, SMCG43AHE3/9AT is AEC-Q101 qualified and UL 497B recognized (file E136766), making it suitable for automotive applications including engine control units, ADAS domain controllers, and body electronics. Its 1500 W peak pulse power rating, +150 °C maximum junction temperature, and DO-215AB package with MSL Level 1 reflow compatibility meet stringent OEM requirements - confirmed in Vishay's qualification report for the SMCG family, which explicitly lists SMCG43AHE3/9AT under qualified part numbers.
What does the "HE3" suffix indicate in SMCG43AHE3/9AT?
The "HE3" suffix in SMCG43AHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from industrial-grade "E3" variants. Per Vishay's ordering documentation, HE3 parts feature matte tin-plated leads, pass JESD 201 Class 2 whisker testing, and undergo full automotive stress screening, whereas E3 parts lack AEC-Q101 validation. The "9AT" denotes 13-inch tape-and-reel packaging with 3500 units per reel - essential for high-volume SMT assembly of SMCG43AHE3/9AT.
How does SMCG43AHE3/9AT differ from bidirectional variants like SMCG43CA?
SMCG43AHE3/9AT is unidirectional with cathode-band polarity, while SMCG43CA is bidirectional and unmarked. Electrically, both share identical VWM (43 V), VBR (47.8–52.8 V), and PPPM (1500 W), but SMCG43AHE3/9AT conducts only in reverse avalanche mode and blocks forward current beyond VF ≈ 3.5 V at 100 A, whereas SMCG43CA clamps symmetrically in both directions. Use SMCG43AHE3/9AT for DC rail protection where polarity is fixed; select SMCG43CA only for AC-coupled or floating signal lines requiring bidirectional clamping.
What is the thermal resistance of SMCG43AHE3/9AT, and how does it affect layout?
The SMCG43AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal - as defined in the Vishay datasheet. This value assumes minimum recommended pad layout; reducing copper area increases RθJA and risks exceeding +150 °C junction temperature during sustained surge events. For reliable operation, maintain full pad dimensions and avoid thermal isolation - especially in automotive modules where ambient temperatures exceed 85 °C and SMCG43AHE3/9AT may experience multiple surges in quick succession.
SMCG43AHE3/9AT 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 21.6A
- 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)
SMCG43AHE3/9AT FAQ
1.How can I place an order for SMCG43AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG43AHE3/9AT 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 SMCG43AHE3/9AT reliable?
The price and inventory of SMCG43AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG43AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG43AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG43AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG43AHE3/9AT?
SMCG43AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG43AHE3/9AT 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 SMCG43AHE3/9AT?
For technical support, including SMCG43AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG43AHE3/9AT requirements.
6.How does Aetrix verify that SMCG43AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG43AHE3/9AT 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 SMCG43AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG43AHE3/9AT?
All SMCG43AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG43AHE3/9AT, 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 SMCG43AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG43AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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