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Vishay General Semiconductor - Diodes Division SMCG45AHE3/57T
- Part No.:
- SMCG45AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG45AHE3/57T.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,915
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Product details
Overview
SMCG45AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) 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, 1500 W peak pulse power (PPPM), 20.6 A peak pulse current (IPPM), and clamps to 72.7 V at rated surge. It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power systems.
For engineers reviewing the SMCG45AHE3/57T datasheet, SMCG45AHE3/57T pinout, SMCG45AHE3/57T application, or SMCG45AHE3/57T equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under 10/1000 µs transients, thermal resistance (RθJA = 75 °C/W), and AEC-Q101 qualification status - all critical for ESD/surge protection design validation and automotive BOM selection.
Technical Context
The SMCG45AHE3/57T operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to transient overvoltages. Its low incremental surge resistance and tight VBR tolerance (±5%) ensure consistent clamping performance across production lots.
It is rated for 1500 W peak pulse power per 10/1000 µs waveform, derated above 25 °C per Fig. 2, and supports 200 A non-repetitive forward surge (IFSM) - enabling reliable protection against load dump and inductive switching events in 12 V/24 V automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before conduction begins; defines safe working range for 48 V nominal systems. |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - precise breakdown threshold ensures predictable turn-on during transients without false triggering. |
| VC @ IPPM | 72.7 V - clamping voltage at 20.6 A peak pulse current; limits downstream voltage stress during 10/1000 µs surges. |
| PPPM | 1500 W - peak transient energy handling capability under standardized 10/1000 µs waveform; suitable for ISO 7637-2 Pulse 5a/b. |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on 8 mm × 8 mm copper pads; informs PCB thermal layout requirements. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMCG (DO-215AB), surface-mount gull-wing leaded case with matte tin-plated terminals. Cathode indicated by band; meets UL 94 V-0, J-STD-002 solderability, and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side reference. | Completes conduction path during reverse-transient clamping; must be routed with low-inductance trace to minimize overshoot. |
| Cathode | Current exit terminal in forward bias; marked with band; connects to protected line (e.g., power rail or signal). | Defines polarity-sensitive placement; incorrect orientation disables protection and risks device failure under surge. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and improved humidity resistance vs. epoxy-passivated alternatives. |
| MSL Level 1 (260 °C peak) | Enables standard SMT reflow without moisture-induced popcorning; no bake required prior to assembly. |
| Low profile DO-215AB footprint | 0.220–0.245 inch body length fits compact layouts; compatible with automated pick-and-place equipment. |
| 1500 W 10/1000 µs rating | Provides higher surge margin than SMAJ/SMBJ series at same VWM, reducing need for parallel devices. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring extended temperature and reliability compliance. |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a, up to 110 V/100 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges before they reach LDOs or microcontrollers. Use Value: Clamps to 72.7 V at 20.6 A, limiting stress on downstream 40 V-rated input stages while surviving repeated 1500 W pulses. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS installed at connector interface to shunt fast transients (<1 ns rise) before reaching ADC front-end. Use Value: Sub-100 pF junction capacitance minimizes signal distortion on 10 kHz–1 MHz sensor signals while providing ±15 kV contact ESD immunity. |
| DC Motor Drive Surge Suppression | Telecom Power Supply Input Protection |
Use Scenario: Suppressing inductive kickback from brushed DC motors in automotive seat/mirror actuators. IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb flyback energy during PWM switching transitions. Use Value: 200 A IFSM rating handles repetitive 8.3 ms half-sine surges; 75 °C/W RθJA allows direct PCB heat sinking without heatsink. | Use Scenario: Safeguarding AC/DC converter inputs in telecom base station power supplies against lightning-induced surges. IC Role / Device Role / Timing Role: First-stage protection ahead of bridge rectifier to divert high-energy common-mode transients. Use Value: 1500 W PPPM rating meets IEC 61000-4-5 Level 4 (4 kV line-earth) when paired with appropriate series impedance. |
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) and PPPM (400 W), but lower 400 W rating and SMA (DO-214AC) package; RθJA = 85 °C/W. | Limited to lower-energy transients (IEC 61000-4-2 ±8 kV); unsuitable for ISO 7637-2 Pulse 5. | Select SMAJ45A-E3/57T only for cost-sensitive consumer applications where 1500 W surge margin is unnecessary. |
| SMCJ45A-E3/57T | Same VWM (45 V) and PPPM (1500 W), DO-214AB package; slightly higher VC (73.0 V) and identical RθJA (75 °C/W). | Compatible with same PCB pad layout as SMCG45AHE3/57T; differs only in mechanical outline and marking. | SMCJ45A-E3/57T is a mechanically interchangeable alternative with identical electrical specs and AEC-Q101 qualification. |
Compared with SMAJ45A-E3/57T and SMCJ45A-E3/57T, SMCG45AHE3/57T offers identical surge rating and thermal performance to SMCJ45A-E3/57T but in a lower-profile DO-215AB package, while outperforming SMAJ45A-E3/57T by 275% in peak pulse power - making it optimal for space-constrained automotive modules requiring full ISO 7637-2 compliance.
Availability
SMCG45AHE3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, DC motor drives, and telecom power supply input protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMCG45AHE3/57T 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 automotive qualification.
The SMCG series is engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 1500 W surge capability are mandatory.
FAQ
What is the clamping voltage of SMCG45AHE3/57T at its rated peak pulse current?
The SMCG45AHE3/57T clamps to 72.7 V at its specified peak pulse current (IPPM) of 20.6 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the maximum voltage imposed on protected circuitry during standardized surge events. The clamping performance is guaranteed across the full operating temperature range and forms the basis for downstream component voltage rating selection in designs using SMCG45AHE3/57T.
Is SMCG45AHE3/57T suitable for automotive applications?
Yes, SMCG45AHE3/57T is AEC-Q101 qualified and explicitly designed for automotive use. Its construction includes glass-passivated junction, MSL Level 1 reflow compatibility, and operation up to +150 °C junction temperature. It meets key automotive surge standards including ISO 7637-2 Pulse 5a/b and provides robust protection for ECUs, body control modules, and sensor interfaces - confirmed in Vishay's qualification report referenced in Document Number 88457.
How does the SMCG45AHE3/57T differ from the SMAJ45A-E3/57T in practical design?
The SMCG45AHE3/57T delivers 1500 W peak pulse power versus 400 W for SMAJ45A-E3/57T - a 275% increase - enabling protection against severe load dump and lightning-induced surges that SMAJ45A-E3/57T cannot safely handle. Additionally, SMCG45AHE3/57T uses the lower-profile DO-215AB package and has superior thermal resistance (75 °C/W vs. 85 °C/W), allowing more efficient PCB heat dissipation in dense automotive layouts.
What is the meaning of the 'HE3' suffix in SMCG45AHE3/57T?
The 'HE3' suffix in SMCG45AHE3/57T indicates RoHS-compliant construction with AEC-Q101 qualification. 'H' denotes AEC-Q101 qualification, 'E3' specifies matte tin plating and industrial-grade RoHS compliance per JEDEC standards. This distinguishes it from base variants like SMCG45A-E3/57T (RoHS, not AEC-Q101) and confirms its suitability for automotive production environments where both environmental compliance and reliability certification are mandatory.
Can SMCG45AHE3/57T be used in bidirectional configurations?
No, SMCG45AHE3/57T is a unidirectional TVS diode, as indicated by the 'A' suffix (e.g., SMCG45A). Bidirectional versions carry the 'CA' suffix (e.g., SMCG45CA). Using SMCG45AHE3/57T in a bidirectional application would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. For bidirectional protection, select SMCG45CAHE3/57T or equivalent.
SMCG45AHE3/57T 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)
SMCG45AHE3/57T FAQ
1.How can I place an order for SMCG45AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG45AHE3/57T 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 SMCG45AHE3/57T reliable?
The price and inventory of SMCG45AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG45AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG45AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG45AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG45AHE3/57T?
SMCG45AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG45AHE3/57T 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 SMCG45AHE3/57T?
For technical support, including SMCG45AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG45AHE3/57T requirements.
6.How does Aetrix verify that SMCG45AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG45AHE3/57T 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 SMCG45AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG45AHE3/57T?
All SMCG45AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG45AHE3/57T, 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 SMCG45AHE3/57T part is unused and in its original packaging.
Return procedure for SMCG45AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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