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Vishay General Semiconductor - Diodes Division 1.5SMC20CAHE3_A/I
- Part No.:
- 1.5SMC20CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20CAHE3_A/I.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,698
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Product details
Overview
1.5SMC20CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features a 20 V standoff voltage (VWM), 22.8 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), <1 µA reverse leakage at VWM, and clamps to ≤33.2 V at 45.2 A peak pulse current - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC20CAHE3_A/I datasheet, 1.5SMC20CAHE3_A/I pinout, 1.5SMC20CAHE3_A/I application, or 1.5SMC20CAHE3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, SMC package mechanical data, clamping performance under standardized surge waveforms, and direct alternatives with documented parameter differences.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior during positive and negative transients. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while the SMC package supports automated placement and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow.
The device is rated for 1500 W peak pulse power (10/1000 µs waveform), derated linearly above 25 °C ambient, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads). It is AEC-Q101 qualified (HE3 suffix), RoHS-compliant, and UL 497B recognized for protector classification (QVGQ2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 22.8–25.2 V at 1 mA - Voltage at which device enters avalanche conduction; ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | ≤33.2 V at 45.2 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case transient; critical for IC-level survivability. |
| PPPM | 1500 W - Peak pulse power handling capability; determines maximum energy absorption without failure under standardized surge. |
| IPPM | 45.2 A - Corresponding peak pulse current at VC; used to size PCB trace width and verify system-level surge path integrity. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| Leakage (ID) | <1 µA at 20 V - Minimal standby current draw; preserves signal integrity and battery life in always-on circuits. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals suitable for AC-coupled or differential signal lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied across the device. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly mounted on 8 mm × 8 mm copper pads - eliminates need for external series impedance in many cases. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on downstream ICs - critical for protecting 3.3 V or 5 V logic interfaces without additional voltage margin. |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 260 °C peak - supports high-yield automated assembly without moisture sensitivity concerns. |
| UL 497B recognition (QVGQ2) | Meets safety standards for telecom and industrial signal line protectors - simplifies end-equipment certification for Class 2 circuits. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching MCU or signal conditioner. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2b (inductive kick), leveraging AEC-Q101 qualification and 1500 W surge capacity. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from relay coils, motor drives, or lightning-induced coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, operating in parallel with optocoupler input stage. Use Value: Limits transient voltage to ≤33.2 V, ensuring compatibility with 30 V-rated input buffers and preventing latch-up in isolation ICs. |
| Telecom Line Interface | Consumer USB/Display Port ESD Protection |
Use Scenario: Shielding RS-485/RS-422 differential pairs in base station backhaul or network switch management ports from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional TVS pair (one per line) placed before line driver/receiver ICs to absorb fast-rising transients. Use Value: Achieves sub-1 ns response time and low capacitance (<100 pF), preserving signal rise/fall times while meeting IEC 61000-4-5 compliance. |
Use Scenario: Adding secondary surge protection on USB 2.0 or DisplayPort lanes behind primary ESD diodes in laptops and docking stations. IC Role / Device Role / Timing Role: High-power backup clamp for rare but destructive multi-kV surges that exceed primary ESD device ratings. Use Value: Provides 1500 W pulse handling - 10× higher than typical 150 W ESD arrays - enabling robustness against accidental hot-plug or cable discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA | Same VWM (20 V), lower PPPM (600 W), SMB (DO-214AA) package - 30% smaller footprint, 40% lower surge capacity. | Preferred for space-constrained consumer PCBs where IEC 61000-4-5 Level 2/3 compliance suffices. | Select SMBJ20CA only if board layout cannot accommodate SMC pad dimensions and peak surge energy is ≤600 W. |
| 1.5KE20CA | Same VWM (20 V), same PPPM (1500 W), axial-lead DO-15 package - incompatible with SMT assembly, higher parasitic inductance. | Used in legacy through-hole designs or prototyping where manual soldering is acceptable. | Choose 1.5KE20CA only for hand-soldered repairs or non-automated production; not suitable for new SMT designs. |
Compared with SMBJ20CA and 1.5KE20CA, the 1.5SMC20CAHE3_A/I uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, and full 1500 W surge rating - making it the only option qualified for automotive SMT production requiring both high reliability and high energy handling.
Availability
1.5SMC20CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for 1.5SMC20CAHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix mean in 1.5SMC20CAHE3_A/I?
The "CA" suffix in 1.5SMC20CAHE3_A/I indicates a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., "A"), it has no cathode marking and functions identically regardless of polarity applied across its terminals, making it ideal for AC-coupled or differential signal lines.
Is 1.5SMC20CAHE3_A/I suitable for automotive applications?
Yes, 1.5SMC20CAHE3_A/I is AEC-Q101 qualified (denoted by the "HE3" suffix), tested for temperature cycling, high-temperature reverse bias, and ESD robustness per automotive requirements. It is explicitly rated for under-hood and chassis-mounted use in ECUs, ADAS sensors, and body control modules where sustained +125 °C ambient and repetitive surge exposure occur.
What is the maximum clamping voltage of 1.5SMC20CAHE3_A/I at rated surge current?
The maximum clamping voltage (VC) of 1.5SMC20CAHE3_A/I is 33.2 V at 45.2 A peak pulse current (10/1000 µs waveform), as specified in the Vishay datasheet. This value represents the highest voltage the protected circuit will experience during a full-rated transient event - critical for verifying compatibility with downstream 3.3 V or 5 V logic interfaces.
How does the SMC (DO-214AB) package of 1.5SMC20CAHE3_A/I compare to SMB (DO-214AA)?
The SMC package of 1.5SMC20CAHE3_A/I measures 7.11 mm × 6.22 mm × 2.62 mm and offers higher thermal dissipation and 1500 W pulse power vs. SMB's 4.6 mm × 3.95 mm × 2.3 mm and 600 W rating. The larger SMC footprint improves heat spreading and surge energy handling but requires more PCB area - a trade-off between robustness and density.
Does 1.5SMC20CAHE3_A/I require a heatsink for normal operation?
No, 1.5SMC20CAHE3_A/I does not require an external heatsink for transient suppression duty cycles (e.g., IEC 61000-4-5 pulses at 0.01 % duty cycle). Its RθJA of 75 °C/W and 6.5 W steady-state power dissipation are sufficient when mounted on standard 8 mm × 8 mm copper pads per Vishay's recommended layout - heatsinking is only needed for continuous high-power DC fault conditions, which fall outside its intended use case.
1.5SMC20CAHE3_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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- 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)
1.5SMC20CAHE3_A/I FAQ
1.How can I place an order for 1.5SMC20CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20CAHE3_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 1.5SMC20CAHE3_A/I reliable?
The price and inventory of 1.5SMC20CAHE3_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 1.5SMC20CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC20CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20CAHE3_A/I?
1.5SMC20CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20CAHE3_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 1.5SMC20CAHE3_A/I?
For technical support, including 1.5SMC20CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20CAHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC20CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20CAHE3_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 1.5SMC20CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC20CAHE3_A/I?
All 1.5SMC20CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20CAHE3_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 1.5SMC20CAHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC20CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20CAHE3_A/I Tags
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