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Vishay General Semiconductor - Diodes Division 1.5SMC51CAHE3_A/I
- Part No.:
- 1.5SMC51CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51CAHE3_A/I.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,244
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Product details
Overview
1.5SMC51CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. It features a 51 V breakdown voltage (VBR min/max = 48.5–53.6 V at 1 mA), 43.6 V stand-off voltage (VWM), clamps to ≤70.1 V at 21.4 A peak pulse current (10/1000 μs), and delivers 1500 W peak pulse power. It is AEC-Q101 qualified and used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC51CAHE3_A/I datasheet, 1.5SMC51CAHE3_A/I pinout, 1.5SMC51CAHE3_A/I application, or 1.5SMC51CAHE3_A/I equivalent, this device is selected for robust bidirectional ESD and lightning surge suppression where low clamping voltage, fast response (<1 ns), and automotive-grade reliability are required - especially in CAN/LIN bus nodes, automotive body control modules, and industrial PLC analog inputs.
Technical Context
The 1.5SMC51CAHE3_A/I operates as a silicon avalanche diode with symmetrical bidirectional conduction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
It responds to transients with sub-nanosecond turn-on time and maintains low dynamic impedance (incremental surge resistance) to minimize voltage overshoot during 10/1000 μs surges. Thermal resistance (RθJA = 75 °C/W) and 150 °C max junction temperature support operation in under-hood automotive environments when mounted per recommended 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise avalanche initiation threshold in both directions |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | ≤70.1 V at 21.4 A (10/1000 μs) - clamping voltage limiting downstream IC stress during surge events |
| PPPM | 1500 W - peak surge energy handling capability compliant with IEC 61000-4-5 Level 4 |
| Junction Temp Range | −65 °C to +150 °C - enables deployment in automotive engine compartments and industrial enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, and no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional) | One end of symmetrical avalanche junction; connects to protected line or node |
| Terminal 2 | Cathode (bidirectional) | Other end of symmetrical avalanche junction; connects to reference (e.g., ground or rail) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 1500 W surge rating | Enables single-device protection of AC signals, differential buses (e.g., RS-485, CAN), and floating sensors without external polarity management |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream 5 V or 3.3 V logic, reducing need for secondary protection stages |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive applications including BCM, ADAS sensor hubs, and infotainment I/O |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift across temperature and lifetime |
Applications
| Automotive Sensor Interface | Industrial Analog Input Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and temperature/pressure sensor outputs in vehicle cabin modules against load dump and ESD. IC Role / Device Role: Bidirectional TVS placed between sensor signal line and chassis ground to clamp ±1 kV EFT and 10/1000 μs surges. Use Value: Prevents latch-up or damage to 12-bit ADC front-ends by limiting transient voltage to ≤70.1 V while maintaining <1 μA leakage at 43.6 V nominal. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers against field wiring surges and induced lightning transients. IC Role / Device Role: Placed across input terminals to shunt surge current away from precision op-amp and isolator circuitry. Use Value: Withstands repetitive 1500 W pulses at 0.01% duty cycle, enabling reliable operation in harsh factory floor environments without derating. |
| Automotive Body Control Module | Consumer Appliance Motor Drive I/O |
|
Use Scenario: Shielding microcontroller GPIOs driving relays and LEDs in door module ECUs from inductive kickback and battery reversal transients. IC Role / Device Role: Bidirectional clamp on switched 12 V supply lines feeding solenoid drivers and status indicators. Use Value: AEC-Q101 qualification ensures compliance with ISO 7637-2 Pulse 1/2a/3a, eliminating need for additional qualification testing. |
Use Scenario: Protecting microcontroller UART lines and hall-effect sensor inputs in washing machine motor control boards from ESD and motor commutation noise. IC Role / Device Role: Mounted directly at board edge connectors to intercept fast transients before reaching MCU pins. Use Value: Sub-nanosecond response and low capacitance (<100 pF at 0 V) prevent signal integrity degradation on 115.2 kbps serial links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Same VBR range but lower PPPM (600 W), SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer PCBs with lower surge threat levels (IEC 61000-4-2 only) | Select when board area is critical and surge energy does not exceed 600 W; verify thermal margin with smaller pad layout. |
| 1.5KE51CA | Same electrical specs but axial DO-15 package; no AEC-Q101 qualification; higher RθJA (100 °C/W) | Used in legacy industrial power supplies and non-automotive equipment where through-hole mounting is preferred | Choose for cost-sensitive, non-automotive designs requiring identical clamping but accepting manual assembly and reduced thermal performance. |
Compared with SMBJ51CA and 1.5KE51CA, the 1.5SMC51CAHE3_A/I provides higher surge robustness (1500 W vs. 600 W or same-power axial), automotive qualification, and optimized SMT thermal performance - making it the preferred choice for new automotive and industrial designs demanding reliability and scalability.
Availability
1.5SMC51CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial analog input safeguarding, and consumer appliance motor drive I/O requiring stable component supply and full traceability.
Supply support for 1.5SMC51CAHE3_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 is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in automotive, industrial, and telecom systems - prioritizing low clamping, AEC-Q101 compliance, and robust surge handling in compact SMC packaging.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC51CAHE3_A/I?
The 1.5SMC51CAHE3_A/I has a breakdown voltage (VBR) range of 48.5 V to 53.6 V at 1 mA test current, corresponding to a ±5% tolerance around the nominal 51 V rating. This tight tolerance ensures predictable clamping behavior in bidirectional protection circuits and supports consistent design margins across production lots.
Is the 1.5SMC51CAHE3_A/I suitable for CAN bus protection?
Yes, the 1.5SMC51CAHE3_A/I is widely used for CAN FD and classical CAN bus protection due to its bidirectional symmetry, low clamping voltage (≤70.1 V), and fast response. Its 43.6 V stand-off voltage aligns with 12 V automotive supply rails, and AEC-Q101 qualification confirms suitability for automotive network nodes without additional validation.
Does the 1.5SMC51CAHE3_A/I have polarity markings on the package?
No - the 1.5SMC51CAHE3_A/I is a bidirectional TVS diode and carries no cathode band or polarity marking on the SMC (DO-214AB) case. Both terminals are functionally identical, allowing flexible placement across differential or AC-coupled signal paths without orientation constraints during automated assembly.
What is the maximum operating temperature for the 1.5SMC51CAHE3_A/I?
The 1.5SMC51CAHE3_A/I has a maximum junction temperature (TJ) of +150 °C and an operating ambient range of −65 °C to +150 °C. When mounted on the recommended 8.0 mm × 8.0 mm copper pads, it sustains full 1500 W surge capability at up to +85 °C ambient, supporting under-hood automotive and industrial control cabinet deployments.
How does the HE3 suffix affect the 1.5SMC51CAHE3_A/I specification?
The HE3 suffix on 1.5SMC51CAHE3_A/I denotes RoHS-compliant construction with AEC-Q101 qualification - confirming successful completion of automotive stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). This distinguishes it from commercial-grade E3 or M3 variants lacking automotive validation.
1.5SMC51CAHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 21.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC51CAHE3_A/I FAQ
1.How can I place an order for 1.5SMC51CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51CAHE3_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 1.5SMC51CAHE3_A/I reliable?
The price and inventory of 1.5SMC51CAHE3_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 1.5SMC51CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC51CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51CAHE3_A/I?
1.5SMC51CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51CAHE3_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 1.5SMC51CAHE3_A/I?
For technical support, including 1.5SMC51CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51CAHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC51CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51CAHE3_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 1.5SMC51CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC51CAHE3_A/I?
All 1.5SMC51CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51CAHE3_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 1.5SMC51CAHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC51CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51CAHE3_A/I Tags
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