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Vishay General Semiconductor - Diodes Division SMCG8.5AHE3/57T
- Part No.:
- SMCG8.5AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG8.5AHE3/57T.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,974
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Product details
Overview
SMCG8.5AHE3/57T 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 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V clamping voltage (VC) at 20 A peak pulse current, and 1500 W peak pulse power rating with a 10/1000 µs waveform - suitable for automotive power line and sensor interface surge suppression.
For engineers reviewing the SMCG8.5AHE3/57T datasheet, SMCG8.5AHE3/57T pinout, SMCG8.5AHE3/57T application, or SMCG8.5AHE3/57T equivalent, this AEC-Q101 qualified TVS offers verified clamping performance, low incremental surge resistance, and RoHS-compliant matte tin-plated leads - critical for high-reliability automotive and industrial PCB designs requiring IEC 61000-4-5 compliance support.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at 8.5 V), then rapidly avalanches to limit transient voltages when VBR is exceeded. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability across -55 °C to +150 °C operating range.
The device uses a single-junction silicon avalanche structure optimized for fast response (<1 ns) and low clamping ratio (VC/VBR ≈ 1.45). Thermal resistance is specified at RθJA = 75 °C/W on standard 8.0 mm × 8.0 mm copper pads, enabling predictable power derating above 25 °C ambient per Figure 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before significant leakage; defines safe working margin below breakdown. |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - guaranteed avalanche initiation window; ensures consistent turn-on across production lots. |
| VC @ IPPM | 14.4 V at 20 A (10/1000 µs) - clamped voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| PPPM | 1500 W - peak transient energy handling capacity; supports Level 4 IEC 61000-4-5 (4 kV/2 Ω) testing with margin. |
| ID @ VWM | 1.0 µA max - ultra-low reverse leakage preserves signal integrity and battery life in always-on systems. |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-power industrial enclosures. |
| Package | SMCG (DO-215AB) - surface-mount gull-wing package with 0.220"–0.245" lead span; compatible with automated SMT placement and reflow. |
Pinout & Package
SMCG8.5AHE3/57T uses the SMCG (DO-215AB) package: a molded, gull-wing surface-mount outline with cathode band marking on the top surface. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms current loop during clamping event. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 12 V rail or sensor output); marked by visible band on case. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Glass-passivated junction | Stable VBR tolerance and low leakage drift over time and temperature - eliminates parameter shift in harsh environments. |
| Low incremental surge resistance | Enables tighter VC/VBR ratio (≈1.45), reducing voltage overshoot during fast transients compared to standard Zener-based TVS devices. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - no baking required pre-assembly. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation meets flammability safety requirements for enclosed automotive and industrial modules. |
Applications
| Automotive Power Rail Protection | Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and infotainment head units. IC Role / Device Role: Unidirectional shunt clamp placed between power rail and chassis ground. Use Value: Limits peak voltage to 14.4 V during 20 A surge, preventing damage to 16 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Protecting analog outputs of pressure, temperature, and position sensors exposed to ESD and cable discharge events. IC Role / Device Role: Low-capacitance (≈100 pF typical) TVS connected between signal line and ground. Use Value: Sub-µA leakage at 8.5 V avoids loading sensor output; 14.4 V clamping prevents ADC saturation or op-amp latch-up. |
| Industrial Motor Drive Control | Telecom Power Interface |
|
Use Scenario: Safeguarding gate drivers and feedback circuits in BLDC inverters subject to inductive switching spikes. IC Role / Device Role: Clamp placed across MOSFET gate-source or across current-sense resistor inputs. Use Value: Fast <1 ns response captures nanosecond-scale ringing; 1500 W rating handles repetitive 100 A motor commutation surges. |
Use Scenario: Front-end protection of PoE-powered equipment (e.g., IP cameras, wireless access points) against lightning-induced surges on Ethernet lines. IC Role / Device Role: Paired unidirectional TVS on each data pair, referenced to isolated ground plane. Use Value: AEC-Q101 qualification ensures long-term stability in outdoor telecom cabinets; DO-215AB footprint allows dense layout near RJ45 connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A-E3/57T | Same VWM (8.5 V) and VC (14.4 V), but lower PPPM (400 W) and smaller SMA (DO-214AC) package. | Limited to lower-energy transients (e.g., ESD only); unsuitable for load-dump or IEC 61000-4-5 Level 4. | Select SMAJ8.5A-E3/57T only when board space is constrained and surge energy is ≤400 W. |
| SMCJ8.5A-E3/57T | Identical electrical specs (VWM, VBR, VC, PPPM), same DO-215AB package, but lacks AEC-Q101 qualification and HE3 suffix. | Not approved for automotive use; acceptable for industrial/commercial applications where qualification is not mandated. | Choose SMCJ8.5A-E3/57T for cost-sensitive non-automotive designs requiring identical clamping performance. |
Compared with SMAJ8.5A-E3/57T and SMCJ8.5A-E3/57T, SMCG8.5AHE3/57T uniquely combines 1500 W surge capability, AEC-Q101 qualification, and RoHS/halogen-free compliance in the DO-215AB footprint - making it the only option qualified for automotive front-end power protection where both energy handling and reliability certification are mandatory.
Availability
SMCG8.5AHE3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive protection, and telecom power interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG8.5AHE3/57T 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, TVS devices, and optoelectronics with emphasis on high-reliability, automotive-grade, and industrial solutions.
The SMCG series was developed specifically for AEC-Q101-compliant transient suppression in automotive power distribution and sensor interfaces - delivering higher surge ratings than SMAJ/SMCJ families while maintaining compatibility with standard SMT assembly processes.
FAQ
What is the clamping voltage of SMCG8.5AHE3/57T at its rated peak pulse current?
The SMCG8.5AHE3/57T has a maximum clamping voltage (VC) of 14.4 V at 20 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and represents the upper voltage limit imposed on the protected circuit during a defined surge event. The SMCG8.5AHE3/57T maintains this clamping performance consistently due to its glass-passivated junction and low incremental surge resistance.
Is SMCG8.5AHE3/57T suitable for bidirectional transient protection?
No, SMCG8.5AHE3/57T is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMCG8.5CA variant (e.g., SMCG8.5CAHE3/57T), which provides symmetrical clamping in both polarities. Using SMCG8.5AHE3/57T in bidirectional applications may result in forward conduction and failure during negative transients.
Does SMCG8.5AHE3/57T require derating at elevated ambient temperatures?
Yes, SMCG8.5AHE3/57T must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Document Number 88457). Its peak pulse power rating decreases linearly with increasing junction temperature, reaching ~50 % of 1500 W at TJ ≈ 100 °C. Designers must apply thermal modeling using RθJA = 75 °C/W and ensure adequate copper pad area (0.31" × 0.31") to maintain safe operation within the -55 °C to +150 °C junction range.
What does the "HE3" suffix signify in SMCG8.5AHE3/57T?
The "HE3" suffix in SMCG8.5AHE3/57T indicates RoHS-compliant construction with AEC-Q101 qualification and industrial-grade reliability. Specifically, "H" denotes AEC-Q101 qualification, "E3" confirms RoHS compliance and matte tin plating, and "57T" specifies packaging in 7" diameter tape-and-reel with 850 units per reel. This distinguishes it from non-automotive variants like SMCJ8.5A-E3/57T.
Can SMCG8.5AHE3/57T be used in place of SMAJ8.5A-E3/57T without layout changes?
No - although both share the same VWM and VC, SMCG8.5AHE3/57T uses the larger DO-215AB (SMCG) package, whereas SMAJ8.5A-E3/57T uses the smaller DO-214AC (SMA) package. Their footprints are incompatible: SMCG requires wider lead spacing (0.220"–0.245") and different pad geometry. Replacing SMAJ8.5A-E3/57T with SMCG8.5AHE3/57T requires PCB layout revision to accommodate the DO-215AB outline.
SMCG8.5AHE3/57T 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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 104.2A
- 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)
SMCG8.5AHE3/57T FAQ
1.How can I place an order for SMCG8.5AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG8.5AHE3/57T 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 SMCG8.5AHE3/57T reliable?
The price and inventory of SMCG8.5AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG8.5AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG8.5AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG8.5AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG8.5AHE3/57T?
SMCG8.5AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG8.5AHE3/57T 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 SMCG8.5AHE3/57T?
For technical support, including SMCG8.5AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG8.5AHE3/57T requirements.
6.How does Aetrix verify that SMCG8.5AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG8.5AHE3/57T 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 SMCG8.5AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG8.5AHE3/57T?
All SMCG8.5AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG8.5AHE3/57T, 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 SMCG8.5AHE3/57T part is unused and in its original packaging.
Return procedure for SMCG8.5AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG8.5AHE3/57T Tags
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