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Vishay General Semiconductor - Diodes Division SMCJ45CAHE3_A/H
- Part No.:
- SMCJ45CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ45CAHE3_A/H.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ45CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with a 10/1000 μs waveform. It features a 45 V stand-off voltage (VWM), 72.7 V maximum clamping voltage (VC) at 20.6 A peak pulse current (IPPM), and operates across -55 °C to +150 °C junction temperature range. It is AEC-Q101 qualified and RoHS-compliant, targeting automotive and industrial electronics protection.
For engineers reviewing the SMCJ45CAHE3_A/H datasheet, SMCJ45CAHE3_A/H pinout, SMCJ45CAHE3_A/H application, or SMCJ45CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge rating, 45 V VWM compatibility with 3.3 V–48 V bus systems, AEC-Q101 qualification status, and SMC package thermal performance under high-reliability PCB layouts.
Technical Context
The SMCJ45CAHE3_A/H implements a glass-passivated silicon avalanche diode structure optimized for fast transient suppression. Its bidirectional symmetry ensures identical electrical characteristics in both polarities, with breakdown voltage (VBR) specified between 50.0 V and 55.3 V at 1 mA test current - enabling robust overvoltage protection on AC-coupled or floating signal lines.
Thermal design relies on low junction-to-lead resistance (RθJL = 15 °C/W) and moderate junction-to-ambient resistance (RθJA = 75 °C/W), requiring adherence to recommended 8.0 mm × 8.0 mm copper pad layout per terminal for rated 1500 W pulse handling. It meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines compatibility with 48 V nominal systems. |
| VBR min/max | 50.0 V / 55.3 V at IT = 1 mA - Ensures reliable avalanche initiation within tight tolerance for predictable turn-on behavior. |
| VC @ IPPM | 72.7 V at 20.6 A - Clamped voltage during full-rated 1500 W transient; limits downstream IC stress to safe levels. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMC (DO-214AB) - Surface-mount footprint with 7.75 mm × 6.22 mm body and 2.06 mm height; compatible with automated placement. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
SMCJ45CAHE3_A/H uses the SMC (DO-214AB) package: a 2-terminal, non-polarized surface-mount device with no cathode/anode marking for bidirectional variants. Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as input/output node; symmetrical construction enables AC line or differential signal protection without polarity constraints. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; no functional distinction - used for connection to protected line and ground/reference plane. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout on balanced interfaces like RS-485 or CAN FD. |
| 1500 W peak pulse rating | Withstands 10/1000 μs surges up to 20.6 A - meets IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor modules - ensures long-term reliability under thermal and mechanical stress. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients - critical for protecting sensitive gate drivers and microcontroller I/O pins. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow profile - simplifies manufacturing and avoids baking requirements. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between power rail and chassis ground to clamp surges exceeding 45 V. Use Value: Limits peak voltage to ≤72.7 V during 1500 W transients, preventing damage to LDOs, CAN transceivers, and MCU power domains. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: TVS connected across differential pair or single-ended output to suppress ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-1 ns response time and low clamping voltage preserve signal integrity while maintaining <100 pF junction capacitance at zero bias. |
| Telecom Data Line Surge Suppression | Consumer USB Port Overvoltage Protection |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors against lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Bidirectional TVS deployed on each data line (e.g., TX+/TX−) referenced to local ground or common-mode choke center tap. Use Value: Symmetrical clamping ensures equal protection on both polarities of AC-coupled signals, supporting IEEE 802.3af/at compliance. | Use Scenario: Preventing damage to USB 2.0 host controllers and Type-A receptacles from hot-plug induced transients and external ESD events. IC Role / Device Role / Timing Role: TVS placed between VBUS and GND, and optionally across D+/D−, to absorb 1500 W surges without latch-up. Use Value: 45 V VWM aligns with USB 2.0 VBUS tolerance (4.4–5.25 V nominal, up to 5.5 V); 72.7 V VC prevents overvoltage on internal 5 V regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45CA-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not suitable for 1500 W surge environments; limited to lower-energy transients in space-constrained consumer designs | Select only when board area is critical and surge threat level is ≤IEC 61000-4-5 Level 2. |
| SMCJ45AHE3_A/H | Unidirectional variant; same VWM, VC, and PPPM but asymmetric conduction - conducts forward current below ~1.2 V | Requires correct polarity orientation; unsuitable for AC or floating lines where reverse voltage may occur | Choose only for DC-biased rails with known polarity, such as 48 V telecom power feeds. |
Compared with SMAJ45CA-E3/57T and SMCJ45AHE3_A/H, the SMCJ45CAHE3_A/H delivers superior surge energy handling in a thermally robust SMC package while maintaining bidirectional symmetry - making it the preferred choice for automotive, industrial, and telecom applications demanding full 1500 W immunity and polarity-agnostic protection.
Availability
SMCJ45CAHE3_A/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom data line surge suppression requiring stable component supply and AEC-Q101 traceability.
Supply support for SMCJ45CAHE3_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 application-specific optimization.
The SMCJ series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial, and infrastructure applications where robustness, AEC-Q101 qualification, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the SMCJ45CAHE3_A/H at its rated peak pulse current?
The SMCJ45CAHE3_A/H has a maximum clamping voltage (VC) of 72.7 V at its rated peak pulse current (IPPM) of 20.6 A with a 10/1000 μs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and reflects the upper limit of voltage seen by protected circuitry during a full 1500 W transient event. The SMCJ45CAHE3_A/H maintains this clamping performance bidirectionally, ensuring consistent protection regardless of surge polarity.
Is the SMCJ45CAHE3_A/H suitable for automotive applications?
Yes, the SMCJ45CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliance and automotive qualification. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD validation. Its -55 °C to +150 °C operating range, 1500 W surge rating, and SMC package's thermal robustness make the SMCJ45CAHE3_A/H appropriate for engine control units, body electronics, and ADAS sensor modules.
How does the bidirectional nature of the SMCJ45CAHE3_A/H affect its PCB layout?
The SMCJ45CAHE3_A/H has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation consideration - either terminal can connect to the protected line and the other to ground or reference. This simplifies routing on differential pairs (e.g., CAN, RS-485), AC-coupled interfaces, or floating sensors. Unlike unidirectional TVS diodes, the SMCJ45CAHE3_A/H eliminates risk of incorrect placement and supports symmetric protection schemes without additional components.
What is the thermal resistance specification for the SMCJ45CAHE3_A/H?
The SMCJ45CAHE3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and a junction-to-ambient resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pad per terminal. These values assume convection cooling only; actual thermal performance depends on PCB copper area, layer stack-up, and airflow. For sustained power dissipation, derating per Figure 2 in the datasheet must be applied above TA = 25 °C - critical for high-temperature automotive deployments of the SMCJ45CAHE3_A/H.
Does the SMCJ45CAHE3_A/H meet any industry surge immunity standards?
Yes, the SMCJ45CAHE3_A/H supports compliance with IEC 61000-4-5 (surge immunity) Level 4 (4 kV line-earth, 2 kV line-line) when implemented with proper PCB layout and grounding. Its 1500 W peak pulse power rating with 10/1000 μs waveform directly maps to the energy requirements of that standard. While the SMCJ45CAHE3_A/H itself is not certified to the standard, its electrical parameters - including VWM = 45 V, VC = 72.7 V, and fast response - enable system-level pass rates when used per Vishay's application guidelines and recommended pad layout.
SMCJ45CAHE3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- 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)
SMCJ45CAHE3_A/H FAQ
1.How can I place an order for SMCJ45CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ45CAHE3_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 SMCJ45CAHE3_A/H reliable?
The price and inventory of SMCJ45CAHE3_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 SMCJ45CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ45CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ45CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ45CAHE3_A/H?
SMCJ45CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ45CAHE3_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 SMCJ45CAHE3_A/H?
For technical support, including SMCJ45CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ45CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ45CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ45CAHE3_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 SMCJ45CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ45CAHE3_A/H?
All SMCJ45CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ45CAHE3_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 SMCJ45CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ45CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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