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Vishay General Semiconductor - Diodes Division SMCJ40AHE3_A/H
- Part No.:
- SMCJ40AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ40AHE3_A/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,967
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Product details
Overview
SMCJ40AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 64.5 V maximum clamping voltage (VC) at 23.3 A peak pulse current (IPPM), and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ40AHE3_A/H datasheet, SMCJ40AHE3_A/H pinout, SMCJ40AHE3_A/H application, or SMCJ40AHE3_A/H equivalent, key selection criteria include clamping performance under 23.3 A surge, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ40AHE3_A/H operates as a silicon avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its unidirectional configuration enables cathode-biased protection of positive-rail circuits, with clamping action triggered when reverse voltage exceeds VBR.
Thermally, it sustains 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Figure 2; its RθJL of 15 °C/W supports efficient heat transfer to PCB copper pads. The device meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin for 48 V systems. |
| VBR min/max | 44.4 V / 49.1 V at IT = 1 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 64.5 V at 23.3 A - Clamping voltage limits downstream IC stress during 10/1000 µs transients (e.g., ISO 7637-2 Pulse 1/2a). |
| PPPM | 1500 W - Peak pulse power handling capability validated on 8.0 mm × 8.0 mm copper pads per JEDEC standards. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient air; requires minimum pad layout for rated power dissipation. |
| AEC-Q101 | Qualified - Certified for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected circuit return path | Connected to system ground or low-side reference; reverse-biased during overvoltage events. |
| Anode | Line-side connection | Connected to protected input (e.g., battery feed or sensor VCC); conducts avalanche current to ground during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability across temperature cycling, humidity, and high-temperature bias life tests. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under thermal and humidity stress. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for 3.3 V/5 V logic interfaces. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking. |
| 1500 W 10/1000 µs rating | Withstands severe load-dump surges (e.g., ISO 16750-2) without degradation when mounted per recommended pad layout. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle battery inputs against load dump and jump-start transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps 64.5 V at 23.3 A to prevent overvoltage damage to upstream regulators and microcontrollers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground near connector entry point. Use Value: Sub-ns response prevents latch-up in precision op-amps and ADC drivers during 8 kV contact ESD events. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from surges induced on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Primary-level TVS on main DC input before secondary regulation and isolation stages. Use Value: 1500 W rating handles repetitive lightning-induced surges without parametric shift or failure. |
Use Scenario: Adding robustness to USB Type-A power pins (VBUS) in portable speakers and docking stations. IC Role / Device Role / Timing Role: Standoff-rated TVS placed inline with VBUS trace to limit voltage to ≤64.5 V during hot-plug transients. Use Value: AEC-Q101 qualification ensures consistent performance across production batches and extended temperature ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A-E3/57T | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Not suitable for automotive load dump; limited to low-energy ESD/surge events. | Select only for space-constrained consumer designs where 1500 W surge immunity is not required. |
| SMCJ40CAHE3_A/H | Bidirectional variant; same VWM/VBR/VC ratings but symmetrical clamping in both polarities. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus), not DC rails. | Choose when protecting balanced differential interfaces or floating sensors where polarity reversal may occur. |
Compared with SMAJ40A-E3/57T and SMCJ40CAHE3_A/H, the SMCJ40AHE3_A/H delivers superior energy handling and automotive qualification while maintaining unidirectional polarity essential for DC power rail protection - making it the optimal choice for high-reliability 40 V system inputs.
Availability
SMCJ40AHE3_A/H is available at Aetrix Electronics and suitable for automotive power modules, industrial sensor nodes, telecom DC feeds, and consumer USB power delivery systems requiring stable component supply and AEC-Q101 compliance.
Supply support for SMCJ40AHE3_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, efficiency, and automotive-grade qualification.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered specifically for ISO 16750-2 and IEC 61000-4-5 compliance in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the clamping voltage of SMCJ40AHE3_A/H at its rated peak pulse current?
The SMCJ40AHE3_A/H has a maximum clamping voltage (VC) of 64.5 V at 23.3 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per JEDEC standards. The clamping performance directly determines the voltage stress imposed on downstream components during surge events, making it a critical parameter for validating protection margins in 48 V automotive and industrial systems using the SMCJ40AHE3_A/H.
Is SMCJ40AHE3_A/H qualified for automotive applications?
Yes, the SMCJ40AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMCJ5.0A–SMCJ188CA datasheet (Document Number 88394, Revision 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling (TCT), and unbiased highly accelerated stress testing (UHAST). The SMCJ40AHE3_A/H is therefore approved for use in engine control units, body electronics, and ADAS power supplies where automotive-grade reliability is mandatory.
What does the "HE3" suffix indicate in SMCJ40AHE3_A/H?
The "HE3" suffix in SMCJ40AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification and halogen-free molding compound. Per Vishay's ordering information table, "Base P/NHE3_X" identifies parts meeting both RoHS Directive 2011/65/EU and AEC-Q101 stress test requirements, where "_X" (here "A/H") specifies the revision code and tape-and-reel packaging format. This distinguishes the SMCJ40AHE3_A/H from commercial-grade "E3" variants and confirms its suitability for automotive production environments requiring full traceability and material compliance.
How is polarity marked on the SMCJ40AHE3_A/H package?
The SMCJ40AHE3_A/H uses a cathode band (visible black stripe) on the SMC (DO-214AB) case to identify the cathode terminal, consistent with unidirectional diode convention. As stated in the mechanical data section, "for unidirectional types the band denotes cathode end"; the anode is the opposite end with no marking. This polarity orientation must be observed during PCB layout - the banded end connects to ground or the lower-potential node, while the anode connects to the line being protected. Incorrect orientation renders the SMCJ40AHE3_A/H ineffective against positive-going transients.
What is the thermal resistance of SMCJ40AHE3_A/H, and how does it affect layout?
The SMCJ40AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout - defined as 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes no additional heatsinking; exceeding the 6.5 W steady-state power dissipation (PD) rating will cause junction temperature to rise rapidly. To maintain reliability in high-ambient environments, PCB layout must allocate adequate copper area and consider thermal vias beneath the SMCJ40AHE3_A/H terminals - especially critical in automotive under-hood applications where ambient temperatures exceed 85 °C.
SMCJ40AHE3_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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 23.3A
- 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)
SMCJ40AHE3_A/H FAQ
1.How can I place an order for SMCJ40AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ40AHE3_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 SMCJ40AHE3_A/H reliable?
The price and inventory of SMCJ40AHE3_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 SMCJ40AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ40AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ40AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ40AHE3_A/H?
SMCJ40AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ40AHE3_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 SMCJ40AHE3_A/H?
For technical support, including SMCJ40AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ40AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ40AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ40AHE3_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 SMCJ40AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ40AHE3_A/H?
All SMCJ40AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ40AHE3_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 SMCJ40AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ40AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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