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Vishay General Semiconductor - Diodes Division SMCJ40CAHE3/57T
- Part No.:
- SMCJ40CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ40CAHE3/57T.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,329
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Product details
Overview
SMCJ40CAHE3/57T 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 40 V standoff voltage (VWM), 1500 W peak pulse power (PPPM), and 64.5 V maximum clamping voltage (VC) at 23.3 A peak pulse current (IPPM). It protects sensitive ICs and MOSFETs against inductive switching transients and lightning-induced surges in automotive and industrial power rails.
For engineers reviewing the SMCJ40CAHE3/57T datasheet, SMCJ40CAHE3/57T pinout, SMCJ40CAHE3/57T application, or SMCJ40CAHE3/57T equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive-grade board-level ESD and surge resilience validation.
Technical Context
The SMCJ40CAHE3/57T operates as a bidirectional avalanche diode with symmetrical breakdown behavior in both polarities, enabling robust protection of AC-coupled or floating signal/power lines without polarity concerns. Its glass-passivated junction ensures stable VBR (min 44.4 V, max 49.1 V at 1 mA) and low temperature coefficient (0.101 %/°C).
It delivers 1500 W peak pulse power under standardized 10/1000 μs waveform per ANSI/IEEE C62.35, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W - supporting reliable operation up to TJ = +150 °C when mounted on 8.0 mm × 8.0 mm copper pads per JEDEC layout guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for 48 V nominal systems. |
| VBR (min/max) | 44.4 V / 49.1 V at IT = 1 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 64.5 V at IPPM = 23.3 A - Clamping voltage limits downstream component stress during 1500 W transient events. |
| PPPM | 1500 W - Peak pulse power rating under 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| ID @ VWM | 1.0 μA - Ultra-low leakage at standoff voltage minimizes standby power loss in battery-powered systems. |
| TJ max. | +150 °C - Extended junction temperature rating enables use in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, RoHS-compliant, matte tin-plated leads, MSL Level 1 (260 °C reflow peak), 0.211 g unit weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (Bidirectional) | Common terminal pair | No polarity marking; symmetrical terminals enable connection across any two-point node requiring bidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses, or ungrounded DC rails without polarity constraints. |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving system-level immunity. |
| MSL Level 1 rating | Allows standard SMT reflow without baking or special handling, reducing manufacturing cost and risk. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 48 V battery-fed ECUs against load dump and alternator surge. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power input pins to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits clamped voltage to 64.5 V, well below 75 V absolute maximum ratings of common 48 V-rated power management ICs. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs from EFT and surge coupling. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground to suppress sub-100 ns transients without distorting mV-level signals. Use Value: 1.0 μA leakage at 40 V preserves signal integrity in high-impedance sensor front-ends while surviving 1500 W surges. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drives |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary surge suppression device placed at board edge, upstream of DC-DC isolation stage. Use Value: 1500 W PPPM meets IEC 61000-4-5 Combination Wave (10/700 μs) requirements for Class B telecom infrastructure. |
Use Scenario: Protecting gate drivers and MCU I/O in washing machine motor control boards from commutation spikes. IC Role / Device Role / Timing Role: Bidirectional TVS across half-bridge supply rails to absorb inductive kickback from BLDC motor windings. Use Value: Symmetrical clamping prevents reverse-bias damage to logic-level MOSFETs during rapid PWM switching transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC40CA | Lower PPPM (400 W), smaller SMA package, higher VC (70 V at 10 A) | Suitable only for lower-energy transients; not rated for automotive AEC-Q101 | Select when space-constrained and surge threat level is limited to IEC 61000-4-4 EFT only. |
| SMCJ40CAHM3/57T | Halogen-free variant with identical electrical specs and AEC-Q101 qualification | Same automotive use cases; differs only in material compliance (halogen-free vs. standard RoHS) | Choose HM3 suffix where halogen-free bill-of-materials is mandated by OEM or regional regulation. |
Compared with SAC40CA and SMCJ40CAHM3/57T, the SMCJ40CAHE3/57T provides the optimal balance of 1500 W surge capacity, AEC-Q101 qualification, and commercial-grade RoHS compliance - making it the preferred choice for mid-to-high-threat automotive and industrial power rail protection where halogen content is not restricted.
Availability
SMCJ40CAHE3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, and telecom DC feed applications requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMCJ40CAHE3/57T 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, power efficiency, and automotive-grade qualification.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where robustness against ISO 7637-2 and IEC 61000-4-5 threats is mandatory.
FAQ
What is the clamping voltage of the SMCJ40CAHE3/57T at its rated peak pulse current?
The SMCJ40CAHE3/57T has a maximum clamping voltage (VC) of 64.5 V at its rated peak pulse current (IPPM) of 23.3 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 64.5 V during a full 1500 W transient event. The SMCJ40CAHE3/57T maintains this clamping performance across its qualified operating temperature range.
Is the SMCJ40CAHE3/57T suitable for automotive applications?
Yes, the SMCJ40CAHE3/57T is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS modules. Its construction features glass-passivated junctions, MSL Level 1 reflow compatibility, and guaranteed operation from –55 °C to +150 °C. The SMCJ40CAHE3/57T meets stringent automotive reliability requirements without derating in typical under-hood thermal environments.
How does the bidirectional configuration of the SMCJ40CAHE3/57T affect its circuit placement?
The SMCJ40CAHE3/57T has no polarity marking and functions identically in both directions, allowing direct placement across any two-node interface - such as across power/ground, differential signal pairs, or floating bus lines - without orientation concerns. This eliminates assembly errors and simplifies layout for AC-coupled or ungrounded systems. Unlike unidirectional variants, the SMCJ40CAHE3/57T requires no cathode alignment during placement.
What is the standoff voltage rating of the SMCJ40CAHE3/57T, and how does it relate to system voltage?
The SMCJ40CAHE3/57T has a standoff voltage (VWM) of 40 V, meaning it remains non-conductive up to this DC or RMS voltage level. This makes it ideal for protecting circuits powered by nominal 36–48 V systems, such as automotive 48 V mild-hybrid architectures or industrial 48 V DC distribution. The 40 V VWM provides sufficient margin above normal operating voltage while ensuring fast response when transients exceed 44.4 V (minimum VBR).
Does the SMCJ40CAHE3/57T require heatsinking for standard operation?
No external heatsink is required for the SMCJ40CAHE3/57T under typical single-event surge conditions, as its thermal design relies on PCB copper pad conduction. When mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, the device achieves RθJA = 75 °C/W - sufficient to dissipate 6.5 W continuously and handle 1500 W transient pulses without exceeding TJ = +150 °C. The SMCJ40CAHE3/57T is optimized for standard FR-4 PCB thermal management.
SMCJ40CAHE3/57T 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):
- 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)
SMCJ40CAHE3/57T FAQ
1.How can I place an order for SMCJ40CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ40CAHE3/57T 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 SMCJ40CAHE3/57T reliable?
The price and inventory of SMCJ40CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ40CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ40CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ40CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ40CAHE3/57T?
SMCJ40CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ40CAHE3/57T 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 SMCJ40CAHE3/57T?
For technical support, including SMCJ40CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ40CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ40CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ40CAHE3/57T 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 SMCJ40CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ40CAHE3/57T?
All SMCJ40CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ40CAHE3/57T, 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 SMCJ40CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ40CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ40CAHE3/57T Tags
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