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Vishay General Semiconductor - Diodes Division SMCJ12CAHE3/9AT
- Part No.:
- SMCJ12CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ12CAHE3/9AT.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,983
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Product details
Overview
SMCJ12CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 12 V standoff voltage (VWM), 19.9 V clamping voltage (VC) at 75.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed across automotive sensor signal lines, industrial I/O ports, and telecom interface protection.
For engineers reviewing the SMCJ12CAHE3/9AT datasheet, SMCJ12CAHE3/9AT pinout, SMCJ12CAHE3/9AT application, or SMCJ12CAHE3/9AT equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 rating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction delivers fast response time (<1 ns) and low incremental surge resistance, critical for protecting MOSFET gates and IC inputs against ESD and inductive switching spikes.
The device is rated for continuous operation from −55 °C to +150 °C junction temperature, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable performance under high ambient conditions when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum reverse standoff voltage before clamping begins; defines operating range for protected circuit |
| VBR min/max | 13.3 V / 14.7 V - breakdown voltage range at 1 mA test current; ensures consistent turn-on threshold |
| VC @ IPPM | 19.9 V at 75.4 A - clamped voltage during 10/1000 μs surge; limits stress on downstream components |
| PPPM | 1500 W - peak pulse power handling capacity; supports high-energy transients like ISO 7637-2 Pulse 5a |
| ID @ VWM | 5.0 μA - reverse leakage at 12 V; negligible loading on low-power signal lines |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive environments |
| Package | SMC (DO-214AB) - surface-mount outline with 8.13 mm × 6.22 mm footprint and 2.62 mm height; compatible with standard SMT reflow |
Pinout & Package
SMCJ12CAHE3/9AT uses the SMC (DO-214AB) package - a two-terminal, bidirectional device with no polarity marking. Both terminals are electrically symmetrical; neither functions as anode or cathode in normal operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient Input/Output Node | Connects to line under protection (e.g., CAN_H or RS-485 A); carries full surge current during clamping |
| Terminal 2 | Transient Input/Output Node | Connects to return path (e.g., CAN_L or RS-485 B); completes symmetrical clamping path with Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards |
| MSL Level 1 | Rated for unlimited floor life at ≤30 °C/85 % RH; supports lead-free reflow up to 260 °C peak |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift |
| Matte tin plated leads | Complies with J-STD-002 and JESD22-B102; eliminates whisker growth risk in Class 2 applications |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation material; meets fire safety requirements for enclosed industrial systems |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤19.9 V, preventing ADC saturation and latch-up while maintaining 12 V DC signal integrity. | Use Scenario: Safeguarding differential data lines in factory automation PLCs subject to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Line-to-line TVS across RS-485 bus (A–B), absorbing common-mode surges up to 1500 W. Use Value: Maintains signal fidelity by clamping transients within 1 ns, preserving >500 kbps data integrity without added latency. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
Use Scenario: Shielding 12 V PoE-powered DSLAM line cards from lightning-induced surges on twisted-pair feeds. IC Role / Device Role / Timing Role: Primary-level surge suppressor installed at board edge before DC-DC converter input. Use Value: Absorbs 10/1000 μs surges up to 75.4 A without degradation, extending system MTBF in outdoor cabinets. | Use Scenario: Guarding USB-C CC and VBUS lines in portable monitors against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Bidirectional clamp between CC1/CC2 and ground, and across VBUS–GND, meeting IEC 61000-4-2 Level 4. Use Value: Delivers <5.0 μA leakage at 12 V, avoiding false CC detection while clamping ±15 kV contact ESD to <20 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (23.2 V at 22.5 A) | Suitable for space-constrained consumer boards but insufficient for ISO 7637-2 Pulse 5a compliance | Select when board area is critical and surge energy is limited to <400 W |
| 1.5KE12CA | Through-hole DO-201 package, same VWM/VC specs, higher thermal mass but incompatible with SMT assembly | Used in legacy industrial power supplies where manual assembly or repairability is prioritized | Choose only for through-hole designs requiring identical electrical behavior and serviceability |
Compared with SMAJ12CA-E3/61T and 1.5KE12CA, the SMCJ12CAHE3/9AT provides optimal balance of high-energy surge handling (1500 W), AEC-Q101 qualification, and SMT manufacturability - making it the preferred choice for new automotive and industrial designs requiring production scalability and long-term supply assurance.
Availability
SMCJ12CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom power feed protection requiring stable component supply across multi-year production cycles.
Supply support for SMCJ12CAHE3/9AT 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 qualification.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive powertrain, ADAS sensor hubs, and industrial control systems where failure modes must be mitigated without compromising signal integrity.
FAQ
What is the clamping voltage of SMCJ12CAHE3/9AT at its rated peak pulse current?
The SMCJ12CAHE3/9AT has a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current (IPPM) of 75.4 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 19.9 V during surge events, preserving functionality of 3.3 V or 5 V logic interfaces connected via appropriate series impedance.
Is SMCJ12CAHE3/9AT suitable for automotive applications?
Yes, SMCJ12CAHE3/9AT is AEC-Q101 qualified and manufactured with HE3 suffix indicating RoHS-compliance and automotive-grade reliability testing. It supports operating temperatures from −55 °C to +150 °C and meets MSL Level 1 for lead-free reflow, making it appropriate for engine control units, body electronics, and ADAS camera modules where transient immunity is critical.
How does the bidirectional design of SMCJ12CAHE3/9AT affect its PCB layout?
The bidirectional nature of SMCJ12CAHE3/9AT eliminates polarity concerns during placement - no cathode band or orientation marking is present. Layout requires symmetric 8.0 mm × 8.0 mm copper pads per terminal per Vishay's recommended footprint, ensuring thermal dissipation and mechanical stability during high-current surges without directional routing constraints.
What is the maximum reverse leakage current of SMCJ12CAHE3/9AT at its standoff voltage?
At its 12 V standoff voltage (VWM), the SMCJ12CAHE3/9AT exhibits a maximum reverse leakage current (ID) of 5.0 μA at 25 °C. This ultra-low leakage ensures minimal loading on high-impedance sensor outputs or reference lines, preserving accuracy in precision analog circuits such as automotive pressure transducers or industrial 4–20 mA loop receivers.
Does SMCJ12CAHE3/9AT meet UL recognition requirements?
Yes, SMCJ12CAHE3/9AT carries Underwriters Laboratories recognition under file number E136766 for both unidirectional and bidirectional transient protectors per UL 497B. Its molding compound also complies with UL 94 V-0 flammability rating, satisfying safety certification requirements for end equipment in North America and globally harmonized markets.
SMCJ12CAHE3/9AT 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 75.4A
- 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)
SMCJ12CAHE3/9AT FAQ
1.How can I place an order for SMCJ12CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ12CAHE3/9AT 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 SMCJ12CAHE3/9AT reliable?
The price and inventory of SMCJ12CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ12CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ12CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ12CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ12CAHE3/9AT?
SMCJ12CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ12CAHE3/9AT 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 SMCJ12CAHE3/9AT?
For technical support, including SMCJ12CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ12CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ12CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ12CAHE3/9AT 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 SMCJ12CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ12CAHE3/9AT?
All SMCJ12CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ12CAHE3/9AT, 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 SMCJ12CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ12CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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