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Vishay General Semiconductor - Diodes Division 1.5SMC18CAHE3_A/H
- Part No.:
- 1.5SMC18CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18CAHE3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,876
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Product details
Overview
1.5SMC18CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features 1500 W peak pulse power (10/1000 µs), 18 V breakdown voltage (VBR min/max = 17.1–18.9 V at 1 mA), and clamps to ≤25.2 V at 59.5 A peak pulse current. It is AEC-Q101 qualified and RoHS-compliant, used in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the 1.5SMC18CAHE3_A/H datasheet, 1.5SMC18CAHE3_A/H pinout, 1.5SMC18CAHE3_A/H application, or 1.5SMC18CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge rating, SMC package thermal performance (RθJA = 75 °C/W), AEC-Q101 qualification status, and compatibility with 8.0 mm × 8.0 mm copper pad layouts per JEDEC standards.
Technical Context
The 1.5SMC18CAHE3_A/H operates as a bidirectional avalanche diode, symmetrically clamping voltage transients above ±18 V in both polarities. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 15.3 V stand-off), while its low incremental surge resistance enables fast response to ESD and lightning-induced surges.
Designed for surface-mount automated assembly, it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature tolerance. The device sustains repetitive 10/1000 µs pulses at 0.01% duty cycle and derates linearly above 25 °C ambient, maintaining operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at IT = 1 mA - defines precise avalanche onset threshold for bidirectional clamping |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage during 1500 W transient, critical for downstream IC survivability |
| PPPM | 1500 W (10/1000 µs waveform) - peak surge handling capacity for lightning and inductive switching events |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8.0 mm × 8.0 mm pads, guides heatsinking requirements |
| TJ max | +150 °C - maximum junction temperature, enabling use in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional construction has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path during positive or negative overvoltage events |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA devices; forms dual-junction structure for bidirectional clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands high-energy transients from automotive load dump or industrial relay switching |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and compatibility with standard lead-free reflow profiles up to 260 °C |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over temperature and lifetime |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ISO 7637-2 pulse 1/2a/5a transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching interface IC. Use Value: Limits induced voltage to ≤25.2 V during 59.5 A transients, preserving signal integrity and preventing latch-up in 3.3 V/5 V sensor front-ends. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or optocoupler input lines exposed to inductive kickback from solenoids and relays. Use Value: Absorbs 1500 W surges without degradation, maintaining <1.0 µA leakage at 15.3 V to ensure reliable logic-level detection. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHY magnetics and PoE injector circuits from lightning-induced common-mode surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: Secondary protection device placed after gas discharge tube (GDT), providing low-clamping backup for fast-rising transients. Use Value: Clamps within nanoseconds to ≤25.2 V, preventing damage to 100BASE-TX transformers rated for ≤30 V isolation. |
Use Scenario: ESD suppression on USB-C CC lines and auxiliary power rails in wall adapters certified to IEC 61000-4-2 Level 4 (±15 kV contact). IC Role / Device Role / Timing Role: Fast-response TVS integrated into secondary-side PCB layout near connector to divert human-body-model discharges. Use Value: Sub-1 ns response time and 25.2 V clamping protect USB PD controllers from permanent gate oxide damage during plug insertion 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 |
|---|---|---|---|
| SMBJ18CA | Lower peak power (600 W), same VBR range, SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer designs where 1500 W margin is not required | Select when board area is limited and surge threat level is moderate (IEC 61000-4-5 Line-to-Ground 1 kV) |
| 1.5KE18CA | Same 1500 W rating but axial DO-201AD package; higher RθJA, no SMT compatibility | Used in legacy through-hole industrial power supplies where rework flexibility is prioritized over automation | Choose only for manual assembly or retrofit scenarios where SMC footprint cannot be accommodated |
Compared with SMBJ18CA and 1.5KE18CA, the 1.5SMC18CAHE3_A/H uniquely combines AEC-Q101 qualification, SMC's optimized thermal performance (RθJA = 75 °C/W), and full 1500 W surge capability in an automated-placement-ready package-making it the preferred choice for new automotive and industrial SMT designs requiring long-term reliability validation.
Availability
1.5SMC18CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface boards, and consumer power adapter designs requiring stable component supply with AEC-Q101 traceability and RoHS compliance.
Supply support for 1.5SMC18CAHE3_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 developed for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 validation, and consistent clamping performance are mandatory.
FAQ
What does the "CA" suffix indicate in 1.5SMC18CAHE3_A/H?
The "CA" suffix in 1.5SMC18CAHE3_A/H denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges. Unlike unidirectional variants (e.g., 1.5SMC18A), it has no cathode marking and functions identically across either terminal orientation-ideal for protecting AC-coupled or floating signal paths without polarity constraints.
Is 1.5SMC18CAHE3_A/H suitable for automotive applications?
Yes, 1.5SMC18CAHE3_A/H is AEC-Q101 qualified and specifically designed for automotive use. Its qualification covers temperature cycling, highly accelerated life testing (HALT), and ESD robustness per automotive stress standards. The device is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces where protection against ISO 7637-2 pulses and load-dump events is required.
What is the maximum clamping voltage of 1.5SMC18CAHE3_A/H under surge conditions?
The maximum clamping voltage (VC) of 1.5SMC18CAHE3_A/H is 25.2 V at 59.5 A peak pulse current (IPPM), measured using the standardized 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage seen by protected circuitry during a full 1500 W transient event and is critical for ensuring compatibility with 3.3 V or 5 V logic interfaces downstream.
How does the SMC (DO-214AB) package of 1.5SMC18CAHE3_A/H compare thermally to smaller packages like SMB?
The SMC (DO-214AB) package of 1.5SMC18CAHE3_A/H delivers superior thermal performance versus SMB: its typical junction-to-ambient thermal resistance (RθJA) is 75 °C/W on 8.0 mm × 8.0 mm copper pads, compared to ~100–120 °C/W for SMB devices. This lower RθJA allows sustained 1500 W surge dissipation without excessive junction temperature rise, making 1.5SMC18CAHE3_A/H more robust in high-repetition-rate or high-ambient-temperature environments.
Does 1.5SMC18CAHE3_A/H require a heatsink for standard operation?
No, 1.5SMC18CAHE3_A/H does not require an external heatsink for standard transient suppression operation. Its SMC package and 75 °C/W RθJA are engineered for self-sufficient thermal management when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per JEDEC. Heatsinking is unnecessary unless operating continuously near its 6.5 W steady-state power dissipation limit-typical use involves short-duration surges, not DC loading.
1.5SMC18CAHE3_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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- 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)
1.5SMC18CAHE3_A/H FAQ
1.How can I place an order for 1.5SMC18CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18CAHE3_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 1.5SMC18CAHE3_A/H reliable?
The price and inventory of 1.5SMC18CAHE3_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 1.5SMC18CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC18CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18CAHE3_A/H?
1.5SMC18CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18CAHE3_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 1.5SMC18CAHE3_A/H?
For technical support, including 1.5SMC18CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18CAHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC18CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18CAHE3_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 1.5SMC18CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC18CAHE3_A/H?
All 1.5SMC18CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18CAHE3_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 1.5SMC18CAHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC18CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18CAHE3_A/H Tags
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