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Vishay General Semiconductor - Diodes Division 1.5SMC20CAHE3/57T
- Part No.:
- 1.5SMC20CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20CAHE3/57T.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,826
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Product details
Overview
1.5SMC20CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 20 V standoff voltage (VWM), 22.8 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), clamping voltage of 33.2 V at 45.2 A, and operates across -65 °C to +150 °C. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges in automotive and industrial systems.
For engineers reviewing the 1.5SMC20CAHE3/57T datasheet, 1.5SMC20CAHE3/57T pinout, 1.5SMC20CAHE3/57T application, or 1.5SMC20CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMC (DO-214AB) package compatibility, thermal resistance (RθJA = 75 °C/W), and compliance with UL 497B surge protector standards.
Technical Context
This device operates as a voltage-clamped shunt protector: when reverse (or forward, in bidirectional mode) voltage exceeds VBR, it avalanches into low-impedance conduction, diverting transient current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM).
Designed for high-reliability environments, the 1.5SMC20CAHE3/57T meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), supports automated placement, and delivers repeatable 1500 W surge handling at 0.01% duty cycle - validated under standardized 10/1000 µs waveform testing per ANSI/IEEE C62.35.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown, min) | 22.8 V at 1.0 mA - Guaranteed avalanche initiation voltage; ensures predictable turn-on during transients. |
| VC (Clamping) | 33.2 V at 45.2 A - Maximum voltage seen by protected circuit during full-rated 1500 W surge; critical for IC voltage tolerance margin. |
| PPPM | 1500 W (10/1000 µs) - Peak transient energy absorption capacity; enables protection against IEC 61000-4-5 Level 4 surges. |
| IPPM | 45.2 A - Corresponding peak pulse current at VC; determines required PCB trace width and grounding path design. |
| TJ Range | -65 °C to +150 °C - Full operational junction temperature range; supports under-hood automotive and industrial ambient conditions. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with IPC-7351B SMC_775X622N. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Conducts during positive or negative overvoltage events; connects to line being protected. |
| Cathode | Transient current sink (bidirectional) | Paired terminal with Anode; forms symmetrical clamping path - no polarity marking on device body. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or differential signals without polarity concerns - eliminates need for dual unidirectional devices. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; supports use in engine control, ADAS, and infotainment power rails. |
| 1500 W peak pulse rating | Withstands repeated 10/1000 µs surges up to 45.2 A - meets IEC 61000-4-5 surge immunity requirements for industrial equipment. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., EFT/burst), improving protection margin for 3.3 V/5 V logic interfaces. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with high-volume automated assembly using 260 °C peak profile. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-supplied ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt TVS placed between power rail and ground to clamp spikes above 33.2 V within nanoseconds. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers exposed to ISO 7637-2 Pulse 5a (up to 60 V/100 ms). |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O of PLC modules from field-wiring induced surges. IC Role / Device Role / Timing Role: Bidirectional clamping element on signal lines to suppress ±1 kV ESD and ±2 kV surge per IEC 61000-4-5. Use Value: Maintains signal integrity while enabling Class 4 surge immunity without adding series impedance or propagation delay. |
| Telecom Line Interface Protection | Consumer Device USB/Power Port Protection |
|
Use Scenario: Shielding Ethernet PHY power pins and data pair terminations in PoE-powered switches and base stations. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF at 0 V) placed across DC bias and signal paths to absorb lightning-induced common-mode surges. Use Value: Limits clamped voltage to ≤33.2 V during 1500 W transients - preserves PHY IC absolute maximum ratings and avoids false link drops. |
Use Scenario: Hardening USB-C VBUS and accessory detection lines in smart home hubs and portable chargers against user-handling ESD. IC Role / Device Role / Timing Role: Primary-level TVS on input power path to absorb ±15 kV contact ESD (IEC 61000-4-2) before reaching DC-DC converters. Use Value: Achieves system-level ESD immunity without derating output current or requiring additional filtering components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA | Same VWM/VBR/VC, but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 90 °C/W). | Not suitable for IEC 61000-4-5 Level 4; limited to consumer-grade surge environments with <600 W threat levels. | Select only if space-constrained and surge threat is ≤600 W - verify thermal derating at elevated ambient temperatures. |
| 1.5KE20CA | Same electrical specs, but axial-leaded DO-201 package; higher mechanical robustness but incompatible with SMT assembly. | Requires through-hole rework or hybrid assembly; unsuitable for high-density PCBs or automated production. | Choose only for prototyping, legacy repair, or non-SMT applications where board real estate and assembly process allow axial mounting. |
Compared with SMBJ20CA and 1.5KE20CA, the 1.5SMC20CAHE3/57T uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC surface-mount compatibility - making it the only option qualified for volume automotive production with full IEC 61000-4-5 compliance and zero manual assembly overhead.
Availability
1.5SMC20CAHE3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 1.5SMC20CAHE3/57T 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, and protection devices with emphasis on reliability, power efficiency, and automotive-grade validation.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive power distribution, industrial automation I/O, and telecom infrastructure where 1500 W surge immunity and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC20CAHE3/57T at its rated peak pulse current?
The 1.5SMC20CAHE3/57T clamps to a maximum of 33.2 V at its rated peak pulse current of 45.2 A (10/1000 µs waveform). This value is guaranteed per the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during full-rated surge events - critical for ensuring compatibility with 3.3 V or 5 V logic supply tolerances.
Is the 1.5SMC20CAHE3/57T suitable for automotive applications?
Yes, the 1.5SMC20CAHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It has passed stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD per AEC-Q101 Rev D - making it appropriate for engine control units, body electronics, and ADAS power rail protection where reliability under thermal and vibration stress is mandatory.
Does the 1.5SMC20CAHE3/57T have polarity markings on the package?
No, the 1.5SMC20CAHE3/57T is a bidirectional TVS diode and carries no polarity marking on its SMC (DO-214AB) package body. Unlike unidirectional variants (e.g., 1.5SMC20A), it functions identically in either orientation - simplifying layout and eliminating risk of incorrect placement during automated assembly.
What is the thermal resistance junction-to-ambient for the 1.5SMC20CAHE3/57T?
The 1.5SMC20CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pad per terminal. This value assumes standard JEDEC test conditions and directly impacts steady-state power dissipation limits - for example, limiting continuous power to ~6.5 W at 50 °C ambient with infinite heatsink assumptions.
How does the 1.5SMC20CAHE3/57T differ from the standard 1.5SMC20CA-E3/57T?
The 1.5SMC20CAHE3/57T differs from 1.5SMC20CA-E3/57T solely in qualification level: the "HE3" suffix denotes AEC-Q101 qualification and RoHS compliance, whereas "E3" indicates commercial-grade RoHS compliance only. Both share identical electrical specs, package, and marking - but only the HE3 variant is approved for automotive production use per manufacturer documentation.
1.5SMC20CAHE3/57T 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:
- Discontinued at Digi-Key
- 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)
1.5SMC20CAHE3/57T FAQ
1.How can I place an order for 1.5SMC20CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20CAHE3/57T 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 1.5SMC20CAHE3/57T reliable?
The price and inventory of 1.5SMC20CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC20CAHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC20CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20CAHE3/57T?
1.5SMC20CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20CAHE3/57T 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 1.5SMC20CAHE3/57T?
For technical support, including 1.5SMC20CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20CAHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC20CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20CAHE3/57T 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 1.5SMC20CAHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC20CAHE3/57T?
All 1.5SMC20CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20CAHE3/57T, 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 1.5SMC20CAHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC20CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20CAHE3/57T Tags
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