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Vishay General Semiconductor - Diodes Division SMCJ8.5AHE3/57T
- Part No.:
- SMCJ8.5AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.5AHE3/57T.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,480
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Product details
Overview
SMCJ8.5AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) 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 maximum clamping voltage (VC) at 104.2 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMCJ8.5AHE3/57T datasheet, SMCJ8.5AHE3/57T pinout, SMCJ8.5AHE3/57T application, or SMCJ8.5AHE3/57T equivalent, this device is selected for automotive-grade transient suppression on DC power rails, signal lines in sensor interfaces, and industrial control inputs where AEC-Q101 qualification, low clamping ratio, and fast response (<1 ns) are critical.
Technical Context
The SMCJ8.5AHE3/57T operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold to shunt surge energy to ground. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive transients.
It delivers 1500 W peak pulse power handling with a low incremental surge resistance, enabling effective clamping of high-energy transients such as ISO 7637-2 Load Dump pulses and IEC 61000-4-5 surges. Thermal resistance is 75 °C/W (junction-to-ambient) on standard 8 mm × 8 mm copper pads, supporting operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - Tight breakdown window ensures predictable turn-on across temperature and lot |
| VC @ IPPM | 14.4 V at 104.2 A - Low clamping voltage limits stress on downstream ICs during surge events |
| PPPM | 1500 W - Handles high-energy transients per 10/1000 µs waveform without failure |
| ID @ VWM | 20 µA - Ultra-low leakage preserves system efficiency in battery-powered or low-power circuits |
| TJ max | +150 °C - Enables use in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - Standardized surface-mount footprint compatible with automated assembly |
Pinout & Package
SMCJ8.5AHE3/57T uses the SMC (DO-214AB) package: a rectangular, low-profile surface-mount case with two leads. Polarity is marked by a cathode band on the body; the banded end is the cathode (anode is unmarked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge return path | Connected to system ground or common reference to divert transient current safely |
| Anode (unmarked end) | Protected line input | Connected to the line being protected (e.g., 12 V rail or sensor output) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensors |
| Glass passivated junction | Ensures stable electrical parameters and long-term reliability under thermal cycling and humidity |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients, protecting 5 V and 3.3 V logic interfaces |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and JESD 22-B102, eliminating whisker risk (JESD 201 Class 2) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in automotive ECUs against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 13.5 V. Use Value: Withstands 1500 W surges and maintains <14.4 V clamping, preventing damage to microcontrollers and CAN transceivers. | Use Scenario: Safeguarding analog outputs of pressure or temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to absorb ESD and inductive switching noise. Use Value: 20 µA leakage at 8.5 V avoids signal offset errors; fast response (<1 ns) prevents latch-up in precision ADC front-ends. |
| Telecom DC Power Input Protection | Consumer USB Power Delivery Line Protection |
Use Scenario: Securing 48 V DC input of PoE-powered network switches against lightning-induced surges. IC Role / Device Role / Timing Role: Primary TVS on input stage, coordinated with upstream fuses and secondary filtering. Use Value: 1500 W rating handles IEC 61000-4-5 Combination Wave (1.2/50 µs & 8/20 µs), ensuring compliance with EN 61000-6-2. | Use Scenario: Adding overvoltage resilience to USB-C VBUS lines in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional suppressor between VBUS and GND, sized for 5–20 V PD profiles. Use Value: Clamps to 14.4 V within nanoseconds, protecting USB PD controllers and port power switches from accidental 24 V misconnection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5AHE3/A | Lower PPPM (400 W), smaller SMA package, same VWM/VBR range | Suitable for lower-energy transients (e.g., ESD-only); not rated for ISO 7637-2 load dump | Select when board space is constrained and surge energy is limited to <400 W |
| SMCJ8.5CAHE3/57T | Bidirectional variant; identical VWM/VBR/PPPM but symmetric clamping in both polarities | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus) | Choose for bidirectional protection where polarity reversal or AC signals exist |
Compared with SMAJ8.5AHE3/A and SMCJ8.5CAHE3/57T, the SMCJ8.5AHE3/57T provides the highest surge energy handling in a standardized SMC footprint while maintaining automotive qualification-making it optimal for primary DC rail protection where robustness and AEC-Q101 compliance are mandatory.
Availability
SMCJ8.5AHE3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, and telecom power supplies requiring stable component supply, AEC-Q101 validation, and high-reliability transient suppression.
Supply support for SMCJ8.5AHE3/57T 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, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where consistent clamping performance and long-term stability are essential.
FAQ
What is the clamping voltage of the SMCJ8.5AHE3/57T at its rated peak pulse current?
The SMCJ8.5AHE3/57T has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current (IPPM) of 104.2 A using a 10/1000 µs waveform. This value is measured under standardized test conditions per JEDEC and ensures predictable overvoltage limiting for downstream components. The SMCJ8.5AHE3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ8.5AHE3/57T qualified for automotive applications?
Yes, the SMCJ8.5AHE3/57T carries AEC-Q101 qualification, confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and surge endurance-making the SMCJ8.5AHE3/57T suitable for under-hood and cabin electronics. The SMCJ8.5AHE3/57T meets requirements for engine control, body electronics, and ADAS sensor protection.
What is the difference between SMCJ8.5AHE3/57T and SMCJ8.5CAHE3/57T?
The SMCJ8.5AHE3/57T is unidirectional, with polarity indicated by a cathode band and intended for DC line protection. The SMCJ8.5CAHE3/57T is bidirectional, offering symmetrical clamping in both directions and no polarity marking-used for AC signals or differential buses like CAN or RS-485. Both share identical VWM (8.5 V), PPPM (1500 W), and SMC packaging, but the SMCJ8.5AHE3/57T cannot replace the CA version in bidirectional applications.
Does the SMCJ8.5AHE3/57T require a heatsink for standard operation?
No, the SMCJ8.5AHE3/57T is designed for surface-mount operation without an external heatsink under typical surge conditions. Its thermal resistance is specified as 75 °C/W (junction-to-ambient) when mounted on 8.0 mm × 8.0 mm copper pads per terminal. For continuous power dissipation, derating applies above 25 °C ambient-but transient suppression duty cycle is inherently low, so heatsinking is unnecessary for standard IEC or ISO surge events. The SMCJ8.5AHE3/57T relies on PCB copper mass for thermal management.
What does the "/57T" suffix indicate in SMCJ8.5AHE3/57T?
"/57T" denotes the preferred packaging configuration: 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This format supports automated pick-and-place assembly. The "HE3" portion confirms RoHS-compliance and AEC-Q101 qualification, while "57T" is a Vishay-defined delivery mode code-not a functional or electrical variant. The SMCJ8.5AHE3/57T shares all electrical and thermal specifications with other HE3 variants in different reels or trays.
SMCJ8.5AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 (SMCJ)
SMCJ8.5AHE3/57T FAQ
1.How can I place an order for SMCJ8.5AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.5AHE3/57T 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 SMCJ8.5AHE3/57T reliable?
The price and inventory of SMCJ8.5AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.5AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ8.5AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.5AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.5AHE3/57T?
SMCJ8.5AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.5AHE3/57T 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 SMCJ8.5AHE3/57T?
For technical support, including SMCJ8.5AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.5AHE3/57T requirements.
6.How does Aetrix verify that SMCJ8.5AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ8.5AHE3/57T 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 SMCJ8.5AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ8.5AHE3/57T?
All SMCJ8.5AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.5AHE3/57T, 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 SMCJ8.5AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ8.5AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.5AHE3/57T Tags
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