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Vishay General Semiconductor - Diodes Division SMCJ28CAHE3_A/I
- Part No.:
- SMCJ28CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ28CAHE3_A/I.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,500
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Product details
Overview
SMCJ28CAHE3_A/I 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 28 V standoff voltage (VWM), 45.4 V clamping voltage (VC) at 33.0 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ28CAHE3_A/I datasheet, SMCJ28CAHE3_A/I pinout, SMCJ28CAHE3_A/I application, or SMCJ28CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD events. Its bidirectional architecture enables symmetrical clamping in both polarities without polarity marking, and its glass-passivated junction ensures stable breakdown behavior across -55 °C to +150 °C operating range.
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and delivers consistent clamping performance under repetitive surge stress when mounted on recommended 0.31" × 0.31" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 31.1 V / 34.4 V - verified breakdown voltage range at 1.0 mA test current |
| VC @ IPPM | 45.4 V - clamped voltage during 33.0 A 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient power handling capacity under standardized waveform |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance supporting reliable power dissipation |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); molded compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient current return path | Bidirectional terminals - either terminal serves as cathode or anode depending on transient polarity; no band marking required |
| Anode (Cathode) | Transient current entry point | Identical electrical role to opposite terminal; symmetric conduction enables dual-polarity protection without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and body electronics |
| 1500 W peak pulse power | Withstands high-energy load dump and ISO 7637-2 Pulse 5a transients in 12 V systems |
| Low RθJL (15 °C/W) | Minimizes junction temperature rise during repeated surges, extending device lifetime |
| MSL Level 1 | Supports standard lead-free reflow without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus and CAN FD power domains against load dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VBAT and GND, clamping surges above 28 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤45.4 V during 33 A transients, preventing latch-up or permanent damage. | Use Scenario: Safeguarding analog outputs of pressure and temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Bidirectional clamp on 4–20 mA loop supply line, suppressing ESD and relay-switching spikes. Use Value: Maintains signal integrity by clamping transients within 1 ns response time while adding <1 pF capacitance at 0 V bias. |
| Telecom Line Card Surge Protection | Consumer USB-C Port Protection |
Use Scenario: Front-end protection of PoE-powered Ethernet switches against lightning-induced surges on data pairs. IC Role / Device Role / Timing Role: Bidirectional TVS array element across differential pair, referenced to common-mode ground. Use Value: Absorbs up to 1500 W of common-mode energy without degradation, preserving IEEE 802.3af/at compliance. | Use Scenario: Overvoltage guard on VBUS and CC lines of USB-C receptacles in portable monitors and docking stations. IC Role / Device Role / Timing Role: Standoff-rated clamp preventing >28 V from reaching USB PD controllers during hot-plug or adapter fault events. Use Value: Prevents catastrophic failure of USB-C controller ICs by limiting transient overshoot to 45.4 V at full rated surge current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28CAHE3_A/I | Lower PPPM (400 W), smaller SMA package, higher RθJA (100 °C/W) | Suitable only for lower-energy transients; not recommended for automotive load dump | Select when board space is constrained and surge energy remains below 400 W |
| SMCJ28AHE3_A/I | Unidirectional version; includes cathode band marking; identical VWM, VC, and PPPM | Requires correct polarity placement; unsuitable for AC or floating circuits | Choose only if circuit topology guarantees unidirectional transient polarity and layout allows orientation control |
Compared with SMCJ28CAHE3_A/I, SMAJ28CAHE3_A/I offers reduced footprint but sacrifices 73% surge capacity and thermal performance, while SMCJ28AHE3_A/I retains full power rating but introduces polarity dependency - making the bidirectional SMCJ28CAHE3_A/I optimal for flexible, orientation-agnostic protection in harsh environments.
Availability
SMCJ28CAHE3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ28CAHE3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and testing infrastructure focused on reliability and automotive-grade compliance.
The SMCJ series targets high-energy transient suppression in demanding environments; it was engineered specifically for AEC-Q101-compliant automotive, industrial, and telecom applications where 1500 W surge immunity and thermal robustness are critical.
FAQ
What is the clamping voltage of SMCJ28CAHE3_A/I at its rated peak pulse current?
The SMCJ28CAHE3_A/I has a maximum clamping voltage (VC) of 45.4 V when subjected to its rated 33.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components experience limited overvoltage stress during transient events. The SMCJ28CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMCJ28CAHE3_A/I qualified for automotive applications?
Yes, SMCJ28CAHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88394. It undergoes stress testing including temperature cycling, highly accelerated life testing (HALT), and humidity bias HTRB to meet automotive reliability requirements. The SMCJ28CAHE3_A/I is approved for use in engine control units, ADAS camera modules, and body electronics where transient immunity and long-term stability are mandatory.
Does SMCJ28CAHE3_A/I require polarity-aware PCB layout?
No, SMCJ28CAHE3_A/I is a bidirectional TVS diode and carries no polarity marking on its SMC (DO-214AB) package. Its symmetrical breakdown characteristics allow installation in either orientation on the PCB. This eliminates orientation errors during automated placement and simplifies design for AC-coupled, floating, or differential signal paths - a key advantage over unidirectional variants like SMCJ28AHE3_A/I.
What is the thermal resistance from junction to lead for SMCJ28CAHE3_A/I?
The SMCJ28CAHE3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, as specified in Vishay's datasheet 88394. This low value enables efficient heat transfer from the silicon die to the PCB copper pads during surge events, reducing thermal runaway risk and supporting reliable operation under repetitive transient conditions. The SMCJ28CAHE3_A/I achieves this via optimized internal leadframe construction and direct die-to-lead bonding.
Can SMCJ28CAHE3_A/I be used in place of SMCJ28AHE3_A/I?
SMCJ28CAHE3_A/I can replace SMCJ28AHE3_A/I only in circuits where bidirectional clamping is acceptable or required - such as AC lines, floating grounds, or differential buses. Unlike the unidirectional SMCJ28AHE3_A/I, the SMCJ28CAHE3_A/I lacks a cathode band and clamps equally in both directions. However, the SMCJ28CAHE3_A/I should not be substituted where strict polarity control is needed for forward conduction or leakage minimization in DC-biased rails.
SMCJ28CAHE3_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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 33A
- 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)
SMCJ28CAHE3_A/I FAQ
1.How can I place an order for SMCJ28CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ28CAHE3_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 SMCJ28CAHE3_A/I reliable?
The price and inventory of SMCJ28CAHE3_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 SMCJ28CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ28CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ28CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ28CAHE3_A/I?
SMCJ28CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ28CAHE3_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 SMCJ28CAHE3_A/I?
For technical support, including SMCJ28CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ28CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ28CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ28CAHE3_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 SMCJ28CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ28CAHE3_A/I?
All SMCJ28CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ28CAHE3_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 SMCJ28CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ28CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ28CAHE3_A/I Tags
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