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Vishay General Semiconductor - Diodes Division 1.5SMC51CAHE3_A/H
- Part No.:
- 1.5SMC51CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51CAHE3_A/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,226
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Product details
Overview
1.5SMC51CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at IT = 1.0 mA), 70.1 V maximum clamping voltage (VC) at 21.4 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC51CAHE3_A/H datasheet, 1.5SMC51CAHE3_A/H pinout, 1.5SMC51CAHE3_A/H application, or 1.5SMC51CAHE3_A/H equivalent, this device serves as a RoHS-compliant, AEC-Q101-qualified bidirectional TVS in SMC (DO-214AB) package, optimized for fast response (<1 ns), low incremental surge resistance, and stable clamping under repetitive transients.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VWM (43.6 V), and VC specifications in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and reliable operation from −65 °C to +150 °C junction temperature.
The device delivers 21.4 A peak pulse current (IPPM) under standardized 10/1000 µs surge conditions, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling effective power dissipation (PD = 6.5 W) on standard 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 IT = 1.0 mA - defines precise voltage threshold where avalanche conduction begins reliably |
| VWM | 43.6 V - maximum continuous reverse operating voltage before significant leakage occurs |
| VC @ IPPM | 70.1 V at 21.4 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak surge power handling capacity, critical for lightning and ESD immunity compliance |
| IPPM | 21.4 A - maximum non-repetitive surge current the device safely clamps without degradation |
| TJ range | −65 °C to +150 °C - supports under-hood automotive and industrial environments without derating loss |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated assembly |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak), polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical avalanche junction; connects to protected line or ground reference point |
| Cathode | Terminal K | Other side of symmetrical junction; functionally identical to Anode in bidirectional mode - no polarity marking |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in AC or floating signal paths |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD - suitable for engine control, ADAS sensors, and infotainment power rails |
| Glass-passivated junction | Stable leakage (<1 µA at VWM) and long-term parameter consistency across humidity and thermal stress |
| Low incremental surge resistance | Enables tighter VC–VBR margin (ΔV = 26.5 V), reducing voltage overshoot during fast transients |
| 1500 W 10/1000 µs rating | Meets IEC 61000-4-5 Level 4 (4 kV line-to-line) and ISO 7637-2 Pulse 1/2/5a requirements without external series impedance |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point, shunting surge energy to chassis ground before reaching sensitive analog front-ends. Use Value: Maintains signal integrity by limiting transient voltage to ≤70.1 V during 21.4 A surges, preventing latch-up or gate oxide damage in 5 V/12 V interface ICs. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring transients and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage suppression element across input terminals, coordinated with upstream fuse and series resistor for energy coordination. Use Value: Enables >100,000 surge cycles at rated 1500 W due to low thermal resistance (RθJL = 15 °C/W), extending module service life in factory automation. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair data lines per IEC 61000-4-5. IC Role / Device Role / Timing Role: First-stage transient suppressor mounted adjacent to RJ45 connector, paired with common-mode chokes and secondary TVS arrays. Use Value: Fast <1 ns response time captures initial surge edge, while 70.1 V clamping prevents exceedance of PHY absolute maximum ratings (e.g., 3.6 V supply tolerance). |
Use Scenario: Secondary-side overvoltage protection on 5 V/9 V/12 V USB-C and wall adapter outputs exposed to capacitor discharge events or feedback loop faults. IC Role / Device Role / Timing Role: Final barrier between regulator output and connected devices, absorbing fault energy before it reaches downstream USB PD controllers or charging ICs. Use Value: RoHS-compliant and halogen-free (HM3 variant available) construction meets global regulatory requirements for consumer end-products without compromising surge performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Lower PPPM (600 W), same VBR/VC, SMB (DO-214AA) package - 30% smaller footprint but higher RθJA (110 °C/W) | Preferred for space-constrained consumer PCBs where surge severity is limited to IEC 61000-4-2 ±8 kV contact | Select when board area is critical and peak surge current remains ≤10 A; verify thermal margin with reduced copper pad area. |
| 1.5KE51CA | Higher PPPM (1500 W), axial leaded DO-201AD package - no SMT compatibility, slower mounting, higher inductance | Suitable for prototyping, through-hole legacy designs, or high-reliability military systems requiring manual inspection | Choose only if SMT assembly is unavailable or mechanical robustness under vibration outweighs automated placement benefits. |
Compared with SMBJ51CA and 1.5KE51CA, the 1.5SMC51CAHE3_A/H delivers optimal balance of high-power surge handling, AEC-Q101 qualification, and SMC package manufacturability - making it the preferred choice for production automotive and industrial SMT designs requiring validated reliability and repeatable clamping performance.
Availability
1.5SMC51CAHE3_A/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O modules, telecom line interfaces, and consumer power adapter output stages requiring stable component supply, AEC-Q101 compliance, and consistent 1500 W surge capability.
Supply support for 1.5SMC51CAHE3_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 1.5SMC Series was engineered for high-energy transient suppression in demanding surface-mount applications - targeting automotive, industrial, and telecom systems where compact size, AEC-Q101 qualification, and repeatable clamping performance are mandatory.
FAQ
What does the "CA" suffix indicate in 1.5SMC51CAHE3_A/H?
The "CA" suffix in 1.5SMC51CAHE3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities, with identical breakdown, clamping, and leakage characteristics across its two terminals. This eliminates polarity concerns during PCB layout and enables use in AC-coupled or floating signal paths, unlike unidirectional variants (e.g., 1.5SMC51A) that require cathode orientation.
Is 1.5SMC51CAHE3_A/H qualified for automotive applications?
Yes, 1.5SMC51CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HE3" suffix) and documentation. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification - making it suitable for under-hood and cabin applications such as engine control units, body control modules, and ADAS sensor interfaces.
What is the maximum clamping voltage of 1.5SMC51CAHE3_A/H and under what test condition?
The maximum clamping voltage of 1.5SMC51CAHE3_A/H is 70.1 V, measured at a peak pulse current (IPPM) of 21.4 A using the standardized 10/1000 µs double-exponential surge waveform. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events, ensuring compatibility with 5 V and 12 V system components.
How does the SMC (DO-214AB) package of 1.5SMC51CAHE3_A/H compare thermally to SMB (DO-214AA)?
The SMC package of 1.5SMC51CAHE3_A/H offers lower thermal resistance than SMB: RθJA = 75 °C/W versus ~110 °C/W for SMBJ equivalents, due to larger copper pad area (8.0 mm × 8.0 mm) and enhanced leadframe thermal path. This allows sustained 6.5 W power dissipation and better handling of repetitive surges without junction overheating - critical in high-duty-cycle industrial environments.
Can 1.5SMC51CAHE3_A/H be used in place of a unidirectional TVS like 1.5SMC51A?
No - 1.5SMC51CAHE3_A/H is bidirectional and lacks polarity marking, while 1.5SMC51A is unidirectional with a cathode band. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating grounds, whereas unidirectional parts are required for DC rail protection where reverse blocking is needed. Interchange introduces risk of improper clamping or leakage path formation.
1.5SMC51CAHE3_A/H 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/H FAQ
1.How can I place an order for 1.5SMC51CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51CAHE3_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 1.5SMC51CAHE3_A/H reliable?
The price and inventory of 1.5SMC51CAHE3_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 1.5SMC51CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC51CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51CAHE3_A/H?
1.5SMC51CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51CAHE3_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 1.5SMC51CAHE3_A/H?
For technical support, including 1.5SMC51CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51CAHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC51CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51CAHE3_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 1.5SMC51CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC51CAHE3_A/H?
All 1.5SMC51CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51CAHE3_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 1.5SMC51CAHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC51CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51CAHE3_A/H Tags
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