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Vishay General Semiconductor - Diodes Division SMCJ8.5CAHE3_A/H
- Part No.:
- SMCJ8.5CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.5CAHE3_A/H.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,313
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Product details
Overview
SMCJ8.5CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features a 8.5 V stand-off voltage (VWM), 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 - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMCJ8.5CAHE3_A/H datasheet, SMCJ8.5CAHE3_A/H pinout, SMCJ8.5CAHE3_A/H application, or SMCJ8.5CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, 1500 W surge rating, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism. Its bidirectional symmetry enables suppression of both positive and negative transients without polarity sensitivity, and its glass-passivated junction ensures stable breakdown characteristics across temperature and lifetime.
Designed for transient immunity per ISO 7637-2 and IEC 61000-4-5 standards, it delivers fast response time (<1 ns), low incremental surge resistance, and meets MSL Level 1 per J-STD-020 with peak reflow tolerance up to 260 °C - critical for automotive-grade reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - Verified breakdown voltage range ensuring consistent turn-on behavior under ESD/lightning surges. |
| VC @ IPPM | 14.4 V at 104.2 A - Clamped voltage during full 1500 W transient; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 μs waveform; supports high-energy automotive load-dump events. |
| ID @ VWM | 20 μA - Reverse leakage at stand-off voltage; low value minimizes standby power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; supports efficient heat transfer to PCB copper pads without heatsink. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides low-impedance path for negative-going surges; electrically identical to cathode in CA-type devices. |
| Cathode | Transient return path (bidirectional) | Provides low-impedance path for positive-going surges; functionally interchangeable with anode in SMCJ8.5CAHE3_A/H. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces requiring long-term reliability. |
| 1500 W peak pulse power | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) without degradation or failure. |
| Low clamping voltage (14.4 V) | Ensures downstream ICs like CAN transceivers or microcontrollers remain within absolute maximum ratings during surge events. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow soldering without moisture-related popcorn failure or parametric shift. |
| Glass passivated junction | Improves long-term stability of VBR and leakage current under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control modules from load-dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor supply line and ground to limit transient excursions. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V ADC front-ends while maintaining signal integrity during ISO 7637-2 compliance testing. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to field wiring surges in factory automation. IC Role / Device Role / Timing Role: Standoff protection element mounted at connector entry point to shunt induced energy before reaching isolation barriers. Use Value: Enables robust 24 V DC input stage design with <15 V clamping, reducing need for additional series impedance or filtering components. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
|
Use Scenario: Shielding RS-485 transceiver pins in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS placed differential-mode across A/B bus lines to suppress common-mode and differential-mode transients. Use Value: Maintains signal eye diagram integrity by limiting clamping overshoot to ≤14.4 V, supporting >500 kbps data rates without distortion. |
Use Scenario: Adding secondary-side surge immunity to USB-C PD adapters where cost-sensitive consumer designs require minimal BOM impact. IC Role / Device Role / Timing Role: Low-profile SMC-packaged protector applied across output rails to absorb ESD and capacitive discharge events. Use Value: Achieves IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact) protection with single-device solution and zero layout redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5CAHE3_A/H | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (100 °C/W) | Suitable for lower-energy consumer electronics; not rated for automotive load-dump events | Select when space-constrained layouts prioritize footprint over surge capacity. |
| SMCJ8.5CAHM3_A/H | Identical electrical specs and AEC-Q101 qualification; halogen-free molding compound | Same automotive/industrial use cases; required where RoHS + halogen-free compliance is mandated | Choose for green manufacturing programs without compromising performance or qualification. |
Compared with SMCJ8.5CAHE3_A/H, SMAJ8.5CAHE3_A/H trades surge robustness for compactness, while SMCJ8.5CAHM3_A/H maintains full equivalence with enhanced environmental compliance - enabling direct substitution only when halogen-free material is specified.
Availability
SMCJ8.5CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface boards, and consumer power adapter designs requiring stable component supply and AEC-Q101 assurance.
Supply support for SMCJ8.5CAHE3_A/H 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-grade qualification.
The SMCJ series targets high-energy transient suppression in demanding environments, with design focus on automotive electronics, industrial controls, and infrastructure equipment needing certified surge resilience.
FAQ
What is the clamping voltage of SMCJ8.5CAHE3_A/H at its rated peak pulse current?
The SMCJ8.5CAHE3_A/H has a maximum clamping voltage (VC) of 14.4 V at its rated peak pulse current (IPPM) of 104.2 A, measured using the standard 10/1000 μs double-exponential waveform. This value ensures protected circuits remain within safe voltage limits during high-energy transients, and is verified per ANSI/IEEE C62.35 test conditions. The SMCJ8.5CAHE3_A/H achieves this with low incremental surge resistance and stable avalanche conduction.
Is SMCJ8.5CAHE3_A/H qualified for automotive applications?
Yes, SMCJ8.5CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88394. This qualification covers stress tests including temperature cycling, humidity bias HAST, and mechanical shock - validating suitability for under-hood and chassis-mounted automotive systems. The SMCJ8.5CAHE3_A/H also meets MSL Level 1 and supports lead-free reflow up to 260 °C.
How does the bidirectional configuration of SMCJ8.5CAHE3_A/H affect its PCB layout?
The SMCJ8.5CAHE3_A/H has no polarity marking and symmetrical terminal construction, so PCB layout requires no orientation alignment - either end connects to line or ground depending on circuit topology. Its DO-214AB (SMC) footprint uses 0.31" × 0.31" copper pads per terminal for optimal thermal dissipation, and the absence of cathode band simplifies automated placement. Unlike unidirectional variants, the SMCJ8.5CAHE3_A/H eliminates risk of reverse installation error.
What is the maximum operating temperature for SMCJ8.5CAHE3_A/H?
The SMCJ8.5CAHE3_A/H has a maximum junction temperature (TJ max) of +150 °C, allowing reliable operation in high-ambient environments such as automotive engine compartments or industrial motor drives. Its thermal resistance values - RθJL = 15 °C/W and RθJA = 75 °C/W - enable effective heat transfer to PCB copper, and derating curves in the datasheet confirm usable power dissipation down to -55 °C ambient. This range is fully supported in the SMCJ8.5CAHE3_A/H specification.
Can SMCJ8.5CAHE3_A/H replace SMCJ8.0CAHE3_A/H in an existing design?
SMCJ8.5CAHE3_A/H can replace SMCJ8.0CAHE3_A/H if the system's stand-off voltage margin allows 0.5 V increase (from 8.0 V to 8.5 V) and clamping voltage rise (from 13.6 V to 14.4 V) is acceptable. Both share identical package, AEC-Q101 qualification, and 1500 W rating, but the SMCJ8.5CAHE3_A/H offers tighter VBR tolerance and slightly improved thermal performance. Verify transient immunity margins and leakage current impact at VWM before substitution.
SMCJ8.5CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ8.5CAHE3_A/H FAQ
1.How can I place an order for SMCJ8.5CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.5CAHE3_A/H 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 SMCJ8.5CAHE3_A/H reliable?
The price and inventory of SMCJ8.5CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.5CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ8.5CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.5CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.5CAHE3_A/H?
SMCJ8.5CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.5CAHE3_A/H 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 SMCJ8.5CAHE3_A/H?
For technical support, including SMCJ8.5CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.5CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ8.5CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ8.5CAHE3_A/H 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 SMCJ8.5CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ8.5CAHE3_A/H?
All SMCJ8.5CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.5CAHE3_A/H, 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 SMCJ8.5CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ8.5CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.5CAHE3_A/H Tags
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