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Vishay General Semiconductor - Diodes Division SMCJ30CHE3/9AT
- Part No.:
- SMCJ30CHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ30CHE3/9AT.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,458
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Product details
Overview
SMCJ30CHE3/9AT from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage at 31.0 A peak pulse current, and 1500 W peak pulse power dissipation with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor signal lines in automotive and industrial power systems.
For engineers reviewing the SMCJ30CHE3/9AT datasheet, SMCJ30CHE3/9AT pinout, SMCJ30CHE3/9AT application, or SMCJ30CHE3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, bi-directional polarity, 150 °C max junction temperature, low incremental surge resistance, and RoHS-compliant matte tin-plated leads suitable for automated placement on PCBs with 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ30CHE3/9AT operates as a bi-directional avalanche diode, providing symmetrical clamping in both forward and reverse directions without polarity marking. Its breakdown voltage range is 33.3 V to 36.8 V at 1.0 mA test current, with <1.0 µA reverse leakage at 30 V stand-off voltage - enabling reliable hold-off during normal operation while triggering fast (<1 ns response time implied by standard TVS behavior) under transient surges.
It is rated for 1500 W peak pulse power per 10/1000 µs waveform, derated linearly above 25 °C ambient using a 75 °C/W junction-to-ambient thermal resistance. The device meets MSL Level 1 per J-STD-020 and passes JESD 201 Class 2 whisker testing due to its HE3 suffix, confirming suitability for high-reliability automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 33.3 V / 36.8 V at 1.0 mA - ensures consistent avalanche turn-on across production lots |
| VC @ IPPM | 48.4 V at 31.0 A - limits downstream voltage stress during 10/1000 µs transients |
| PPPM | 1500 W - supports high-energy surge suppression in automotive load-dump and ISO 7637-2 scenarios |
| TJ max | +150 °C - enables use in under-hood automotive environments and industrial enclosures |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability and lifetime performance |
| Package | DO-214AB (SMCJ) - surface-mount outline with 8.0 mm × 8.0 mm thermal pad footprint |
Pinout & Package
SMCJ30CHE3/9AT uses a two-terminal DO-214AB (SMCJ) package with no polarity marking for bi-directional operation. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and compatible with reflow profiles peaking at 260 °C (MSL Level 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bi-directional avalanche junction | Both terminals function identically - no cathode band; symmetric clamping in either direction |
| Case (cathode side in uni-directional variants) | Thermal and mechanical interface | Mounting to 8.0 mm × 8.0 mm copper pad improves heat dissipation and surge current handling |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronic modules requiring extended temperature cycling and humidity exposure |
| Glass passivated chip junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients like ESD or inductive switching |
| MSL Level 1 rating | Allows unlimited floor life and compatibility with standard SMT reflow without baking preconditioning |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance - critical for high-vibration automotive harness connections |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V/24 V power rails against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Bi-directional TVS clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Limits rail voltage to ≤48.4 V during 1500 W surges, preventing latch-up or permanent damage to downstream silicon. | Use Scenario: Shielding analog and digital signal paths (e.g., CAN, LIN, thermistor inputs) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor placed at connector entry points. Use Value: Clamps sub-100 ns ESD pulses to safe levels while maintaining signal integrity due to minimal parasitic capacitance. |
| Consumer Power Adapters | Telecom Base Station Interfaces |
Use Scenario: Input-stage surge protection in AC/DC adapters exposed to lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Primary-side TVS on rectified DC bus prior to primary FETs and controllers. Use Value: Absorbs 10/1000 µs surges up to 1500 W without degradation, extending adapter field life in surge-prone regions. | Use Scenario: Ethernet and RS-485 port protection in outdoor telecom equipment subject to induced lightning surges. IC Role / Device Role / Timing Role: Bi-directional clamp on differential pairs to prevent common-mode overvoltage damage. Use Value: Symmetrical clamping ensures balanced protection on both signal lines, preserving differential signaling integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3/61T | Lower PPPM (400 W), SMA package (smaller thermal mass), same VWM and VC | Not suitable for high-energy automotive load dump; limited to low-power signal line protection | Select when board space is constrained and surge energy is ≤400 W |
| SMCJ30AHE3/9AT | Uni-directional variant with cathode band marking; identical VWM, VC, PPPM, and package | Requires correct polarity orientation; unsuitable for AC-coupled or floating signal lines | Choose only if circuit topology enforces unidirectional bias and polarity control is guaranteed |
Compared with SMCJ30CHE3/9AT, the SMAJ30AHE3/61T offers smaller footprint but significantly reduced surge handling, while the SMCJ30AHE3/9AT provides identical power ratings but demands strict polarity alignment - making the bi-directional SMCJ30CHE3/9AT optimal for floating, AC, or polarity-agnostic protection nodes.
Availability
SMCJ30CHE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, and telecom infrastructure requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMCJ30CHE3/9AT 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, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SMCJ series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial, and telecom systems where robustness and repeatable clamping performance are mandatory.
FAQ
What does the "HE3" suffix indicate in SMCJ30CHE3/9AT?
The HE3 suffix in SMCJ30CHE3/9AT denotes RoHS compliance and AEC-Q101 qualification, plus JESD 201 Class 2 whisker resistance for matte tin-plated leads. This confirms the SMCJ30CHE3/9AT is approved for automotive applications requiring enhanced mechanical reliability under vibration and thermal cycling.
Is SMCJ30CHE3/9AT bi-directional or uni-directional?
SMCJ30CHE3/9AT is bi-directional, as indicated by the "C" in its part number (SMCJ30C). It has no polarity marking and provides symmetrical clamping in both directions - unlike uni-directional variants such as SMCJ30AHE3/9AT, which feature a cathode band and require correct orientation.
What is the maximum clamping voltage for SMCJ30CHE3/9AT and under what conditions?
The SMCJ30CHE3/9AT has a maximum clamping voltage (VC) of 48.4 V at 31.0 A peak pulse current, measured using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuits during standardized surge events, ensuring downstream components remain within safe operating ranges.
Can SMCJ30CHE3/9AT be used in place of SMCJ30AHE3/9AT?
No - SMCJ30CHE3/9AT is bi-directional while SMCJ30AHE3/9AT is uni-directional. Substituting them requires verifying circuit polarity constraints: SMCJ30CHE3/9AT works in floating or AC-coupled nodes, whereas SMCJ30AHE3/9AT must be oriented correctly with cathode toward the protected side. Their electrical specs match, but functional compatibility depends on system topology.
What thermal pad layout is recommended for optimal performance of SMCJ30CHE3/9AT?
Vishay specifies mounting SMCJ30CHE3/9AT on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W peak pulse power. This layout minimizes thermal resistance and prevents localized overheating during repetitive surges - essential for sustaining performance in automotive and industrial applications where the SMCJ30CHE3/9AT is deployed.
SMCJ30CHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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)
SMCJ30CHE3/9AT FAQ
1.How can I place an order for SMCJ30CHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ30CHE3/9AT 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 SMCJ30CHE3/9AT reliable?
The price and inventory of SMCJ30CHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ30CHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ30CHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ30CHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ30CHE3/9AT?
SMCJ30CHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ30CHE3/9AT 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 SMCJ30CHE3/9AT?
For technical support, including SMCJ30CHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ30CHE3/9AT requirements.
6.How does Aetrix verify that SMCJ30CHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ30CHE3/9AT 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 SMCJ30CHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ30CHE3/9AT?
All SMCJ30CHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ30CHE3/9AT, 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 SMCJ30CHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ30CHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ30CHE3/9AT Tags
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