My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ8.5CAHE3_A/I
- Part No.:
- SMCJ8.5CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.5CAHE3_A/I.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,843
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ8.5CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 8.5 V standoff voltage (VWM), 1500 W peak pulse power (PPPM), and clamping voltage of 14.4 V at 104.2 A IPPM. It protects signal lines and power rails in automotive sensor units, industrial I/O interfaces, and telecom front-end circuits.
For engineers reviewing the SMCJ8.5CAHE3_A/I datasheet, SMCJ8.5CAHE3_A/I pinout, SMCJ8.5CAHE3_A/I application, or SMCJ8.5CAHE3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, 10/1000 μs waveform compliance, and thermal resistance (RθJA = 75 °C/W) for board-level thermal design.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding its breakdown voltage (VBR min = 9.44 V, max = 10.4 V at IT = 1 mA), it enters avalanche conduction to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage (< 20 μA at VWM) and low incremental surge resistance.
Designed for bidirectional operation, SMCJ8.5CAHE3_A/I exhibits identical electrical characteristics in both polarities - no polarity marking on the case - and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is qualified to AEC-Q101 for automotive underhood and chassis applications.
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 - defines reliable turn-on threshold across temperature and unit variation |
| VC @ IPPM | 14.4 V at 104.2 A - clamped voltage during 10/1000 μs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak transient energy handling capacity under standardized waveform |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on recommended 8 mm × 8 mm copper pads |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" body length and matte tin leads |
Pinout & Package
SMCJ8.5CAHE3_A/I uses the SMC (DO-214AB) package: a two-terminal, non-polarized surface-mount device with no cathode/anode marking due to bidirectional functionality. Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as input/output path; symmetric conduction enables AC line or differential signal protection without orientation constraints |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; no polarity dependency simplifies PCB layout and automated placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| 1500 W peak pulse power | Withstands high-energy transients such as ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without degradation |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage exposure to protected devices compared to higher-ratio TVS diodes |
| MSL Level 1 rating | Enables standard SMT reflow without dry-pack or baking, reducing manufacturing overhead |
| Glass-passivated junction | Ensures stable leakage current (< 20 μA at VWM) and long-term parameter consistency across life cycle |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in engine control modules. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to clamp fast-rising ESD and surge events before reaching signal conditioning circuitry. Use Value: Maintains signal integrity by limiting transient voltage to ≤14.4 V while surviving repeated 1500 W pulses - critical for AEC-Q100 Grade 0/1 system compliance. | Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Bidirectional clamping element across input terminals to absorb both positive and negative polarity transients without polarity-sensitive layout. Use Value: Eliminates need for dual unidirectional devices, reducing BOM count and PCB area while delivering consistent 8.5 V standoff and 14.4 V clamping in either direction. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors exposed to lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary surge suppression stage before common-mode chokes and secondary TVS arrays, handling bulk energy dissipation per IEC 61000-4-5. Use Value: 1500 W PPPM rating supports Level 4 (4 kV/2 kA) surge immunity testing with margin, and bidirectional symmetry avoids polarity misalignment in differential pairs. | Use Scenario: Input-stage overvoltage protection for AC-DC adapters and USB PD chargers subjected to mains-borne transients and hot-plug events. IC Role / Device Role / Timing Role: Standoff-rated clamping device across primary-side rectifier output to prevent MOSFET gate oxide damage during line surges. Use Value: 8.5 V VWM aligns with typical 12 V auxiliary rail designs, and 14.4 V VC ensures downstream regulators remain within absolute maximum ratings during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CAHE3_A/I | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC specs | Reduced surge handling limits use to lower-risk consumer or internal-board applications | Select when space-constrained layouts require smaller footprint and surge threat level is ≤600 W |
| SMCJ8.5CAHM3_A/I | Halogen-free construction, identical electrical and thermal specs, same AEC-Q101 qualification | No functional difference; required only where halogen-free compliance is mandated by OEM or regional regulation | Choose when RoHS + halogen-free material declaration is contractually required |
Compared with SMBJ8.5CAHE3_A/I, SMCJ8.5CAHE3_A/I delivers 2.5× higher surge energy absorption in the same mounting orientation; versus SMCJ8.5CAHM3_A/I, it offers identical protection performance but with standard RoHS-compliant (non-halogen-free) materials.
Availability
SMCJ8.5CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply with AEC-Q101 traceability and full production lifecycle support.
Supply support for SMCJ8.5CAHE3_A/I 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, precision, and automotive-grade qualification.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against ISO 7637-2 and IEC 61000-4-5 threats is mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ8.5CAHE3_A/I?
The "CA" suffix in SMCJ8.5CAHE3_A/I denotes a bidirectional configuration: the device provides symmetrical transient suppression for both positive and negative voltage excursions, with identical breakdown and clamping characteristics in either polarity. This eliminates polarity marking on the SMC (DO-214AB) package and enables use in AC-coupled or differential signal paths without orientation concerns. The SMCJ8.5CAHE3_A/I is not polarity-sensitive.
Is SMCJ8.5CAHE3_A/I qualified for automotive applications?
Yes, SMCJ8.5CAHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" (RoHS-compliant + AEC-Q101). It undergoes stress testing for temperature cycling, high-temperature operating life, and mechanical shock per AEC-Q101 Rev D. This makes SMCJ8.5CAHE3_A/I suitable for under-hood, chassis, and infotainment applications where automotive-grade reliability is mandatory.
What is the clamping voltage of SMCJ8.5CAHE3_A/I and how is it measured?
The clamping voltage (VC) of SMCJ8.5CAHE3_A/I is 14.4 V, measured at peak pulse current (IPPM) of 104.2 A under the standardized 10/1000 μs double-exponential surge waveform. This value represents the maximum voltage seen across the device during worst-case transient events and is critical for ensuring downstream components remain within their absolute maximum ratings. VC is specified at TA = 25 °C with device mounted on 8.0 mm × 8.0 mm copper pads.
How does the thermal resistance of SMCJ8.5CAHE3_A/I affect PCB layout?
The junction-to-ambient thermal resistance (RθJA) of SMCJ8.5CAHE3_A/I is 75 °C/W when mounted on the minimum recommended pad layout - two 8.0 mm × 8.0 mm copper pads, one per terminal. To maintain safe junction temperatures during repetitive surges, PCB layout must replicate this copper area; reducing pad size increases RθJA and risks thermal runaway. Thermal vias under pads further improve heat dissipation but are not assumed in the 75 °C/W rating.
What packaging options are available for SMCJ8.5CAHE3_A/I?
SMCJ8.5CAHE3_A/I is supplied in 13-inch plastic tape and reel format (package code "I"), with 3500 units per reel. The "HE3" suffix confirms RoHS-compliant construction and AEC-Q101 qualification, while "_A/I" indicates revision A and reel packaging. This format supports high-volume automated SMT assembly and is compatible with standard pick-and-place equipment calibrated for SMC (DO-214AB) devices.
SMCJ8.5CAHE3_A/I 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/I FAQ
1.How can I place an order for SMCJ8.5CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.5CAHE3_A/I 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/I reliable?
The price and inventory of SMCJ8.5CAHE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SMCJ8.5CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.5CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.5CAHE3_A/I?
SMCJ8.5CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.5CAHE3_A/I 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/I?
For technical support, including SMCJ8.5CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.5CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ8.5CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ8.5CAHE3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of SMCJ8.5CAHE3_A/I?
All SMCJ8.5CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.5CAHE3_A/I, 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/I part is unused and in its original packaging.
Return procedure for SMCJ8.5CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.5CAHE3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
