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Vishay General Semiconductor - Diodes Division SMCG45AHE3/9AT
- Part No.:
- SMCG45AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG45AHE3/9AT.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,828
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Product details
Overview
SMCG45AHE3/9AT 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 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 72.7 V maximum clamping voltage (VC) at 20.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive powertrain control units to safeguard CAN transceivers against load dump and inductive switching transients.
For engineers reviewing the SMCG45AHE3/9AT datasheet, SMCG45AHE3/9AT pinout, SMCG45AHE3/9AT application, or SMCG45AHE3/9AT 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 across automotive, industrial, and telecom systems.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable breakdown behavior and low incremental surge resistance. Its thermal resistance (RθJA = 75 °C/W) and junction temperature range (–55 °C to +150 °C) support operation in high-ambient environments such as engine bay electronics.
The device meets J-STD-020 MSL Level 1 moisture sensitivity and withstands 200 A peak forward surge current (IFSM) per 8.3 ms half-sine wave - confirming suitability for repetitive transient suppression without degradation when mounted on 8.0 mm × 8.0 mm copper pads per recommended layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR (min/max) | 50.0 V / 55.3 V at IT = 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients. |
| VC @ IPPM | 72.7 V at 20.6 A - Clamping voltage limits downstream IC stress during 10/1000 µs surge events. |
| PPPM | 1500 W - Peak power handling capacity determines survivability against ISO 7637-2 Pulse 5a/b load dump surges. |
| ID @ VWM | 1.0 µA - Ultra-low leakage preserves signal integrity in high-impedance sensor interfaces. |
| TJ max. | +150 °C - Enables placement near heat sources in automotive ECUs without derating concerns. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, gull-wing surface-mount case with matte tin-plated leads, UL 94 V-0 molding compound, and polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward conduction mode | Connected to ground or low-side reference in unidirectional clamp configuration. |
| Cathode | Current exit terminal; marked with band | Connected to protected line (e.g., CAN_H); defines clamping direction toward ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules per stress test requirements. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking - compatible with standard SMT lines. |
| Low RINC (incremental surge resistance) | Minimizes voltage overshoot during fast transients (<1 ns response), critical for protecting high-speed interfaces. |
| 1500 W PPPM @ 10/1000 µs | Supports compliance with ISO 16750-2 and ISO 7637-2 Pulse 5 for 12 V vehicle systems. |
Applications
| Automotive Powertrain Control | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting MCU I/O pins and LIN/CAN transceivers in engine control units exposed to alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and chassis ground to limit transient voltage to <73 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V interface ICs during 100 V/100 ms load dump events per ISO 7637-2. |
Use Scenario: Shielding analog outputs (4–20 mA loops) and digital sensor buses (I²C, SPI) in factory automation PLC modules. IC Role / Device Role / Timing Role: Standoff-clamp protector on field-side signal traces to absorb ESD (IEC 61000-4-2 ±8 kV contact) and switching noise. Use Value: Maintains sub-1 µA leakage at 45 V bias, avoiding offset errors in precision current-loop receivers. |
| Telecom Base Station DC Feeds | Consumer Appliance Motor Drive Circuits |
Use Scenario: Safeguarding PoE-powered Ethernet PHYs and DC-DC controllers receiving 48 V phantom power over long cables. IC Role / Device Role / Timing Role: Primary surge limiter on input rail upstream of DC-DC converter, clamping induced lightning surges. Use Value: Withstands 1500 W peak pulse without failure, meeting IEC 61000-4-5 Level 4 (4 kV line-earth) requirements. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine main control boards. IC Role / Device Role / Timing Role: Clamp diode across motor terminals or H-bridge outputs to divert inductive kickback energy. Use Value: 200 A IFSM rating enables repeated surge absorption during daily motor start-stop cycles without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-E3/57T | Same VWM (45 V), lower PPPM (400 W), SMA (DO-214AC) package, RθJA = 110 °C/W | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5 where 1500 W is required. | Select only if board space constraints prevent DO-215AB placement and surge energy is ≤400 W. |
| SMCJ45AHE3/9AT | Same VWM (45 V), identical DO-215AB package, but higher PPPM (3000 W) and VC = 73.0 V at 41.2 A | Over-spec'd for most 45 V systems; increases cost and may require larger PCB copper area for thermal management. | Choose when legacy designs demand 3 kW capability or future-proofing against harsher surge standards. |
Compared with SMAJ45A-E3/57T, SMCG45AHE3/9AT delivers 275 % more surge power headroom and superior thermal dissipation; versus SMCJ45AHE3/9AT, it offers optimal cost-performance balance for 1.5 kW-class automotive and industrial protection without over-engineering.
Availability
SMCG45AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom DC feed hardening requiring stable component supply and AEC-Q101-compliant surge resilience.
Supply support for SMCG45AHE3/9AT 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 and automotive qualification.
The SMCG series targets high-energy transient suppression in space-constrained automotive and industrial applications, combining AEC-Q101 validation, low-profile DO-215AB packaging, and precise clamping performance for system-level EMC robustness.
FAQ
What is the clamping voltage of SMCG45AHE3/9AT at its rated peak pulse current?
The SMCG45AHE3/9AT has a maximum clamping voltage (VC) of 72.7 V at 20.6 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value ensures protected circuitry remains below critical voltage thresholds during surge events. The SMCG45AHE3/9AT's low clamping ratio (VC/VWM ≈ 1.62) reflects efficient transient energy diversion without excessive voltage overshoot.
Is SMCG45AHE3/9AT qualified for automotive applications?
Yes, SMCG45AHE3/9AT is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias, temperature cycling, and ESD per JESD22-A114. Its HE3 suffix explicitly denotes AEC-Q101 qualification, making SMCG45AHE3/9AT suitable for under-hood and chassis-mounted automotive modules where reliability under thermal and mechanical stress is mandatory.
What does the "9AT" suffix indicate in SMCG45AHE3/9AT?
The "9AT" suffix specifies the packaging format: 13-inch diameter plastic tape and reel containing 3500 units. This differs from "57T", which denotes 7-inch reels of 850 units. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification. SMCG45AHE3/9AT thus combines automotive-grade reliability with high-volume SMT assembly compatibility.
How does SMCG45AHE3/9AT compare to bidirectional variants like SMCG45CA?
SMCG45AHE3/9AT is unidirectional, with polarity marked by a cathode band and optimized for ground-referenced clamping. In contrast, SMCG45CA is bidirectional, lacks polarity marking, and provides symmetrical clamping in both directions - used where AC signals or differential buses (e.g., RS-485) require protection. SMCG45AHE3/9AT cannot substitute for SMCG45CA in AC-coupled applications due to inherent polarity dependence.
What is the thermal resistance of SMCG45AHE3/9AT, and how does it affect layout?
SMCG45AHE3/9AT 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. This value assumes minimum recommended pad layout; reducing copper area increases thermal impedance and risks exceeding TJ max. of +150 °C during repeated surges. Proper layout is essential for sustained SMCG45AHE3/9AT performance in high-power transient scenarios.
SMCG45AHE3/9AT 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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- 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)
SMCG45AHE3/9AT FAQ
1.How can I place an order for SMCG45AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG45AHE3/9AT 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 SMCG45AHE3/9AT reliable?
The price and inventory of SMCG45AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG45AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG45AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG45AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG45AHE3/9AT?
SMCG45AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG45AHE3/9AT 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 SMCG45AHE3/9AT?
For technical support, including SMCG45AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG45AHE3/9AT requirements.
6.How does Aetrix verify that SMCG45AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG45AHE3/9AT 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 SMCG45AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG45AHE3/9AT?
All SMCG45AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG45AHE3/9AT, 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 SMCG45AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG45AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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