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Vishay General Semiconductor - Diodes Division 1.5SMC18CAHM3_A/H
- Part No.:
- 1.5SMC18CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18CAHM3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,481
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Product details
Overview
1.5SMC18CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 1500 W peak pulse power rating (10/1000 μs), 18 V breakdown voltage (VBR min/max = 17.1–18.9 V at IT = 1.0 mA), and clamps transients to ≤25.2 V at 59.5 A peak pulse current - ideal for safeguarding automotive sensor signal lines against ESD and lightning-induced surges.
For engineers reviewing the 1.5SMC18CAHM3_A/H datasheet, 1.5SMC18CAHM3_A/H pinout, 1.5SMC18CAHM3_A/H application, or 1.5SMC18CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
The 1.5SMC18CAHM3_A/H operates as a voltage-clamped transient suppressor using an avalanche junction structure, with symmetrical forward/reverse conduction enabling bidirectional protection without polarity sensitivity. Its glass-passivated chip junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
It delivers 1500 W peak pulse power per 10/1000 μs waveform at TA = 25 °C, derating linearly above 25 °C per Fig. 2, and maintains clamping performance across -65 °C to +150 °C operating junction temperature range. The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at IT = 1.0 mA - defines precise avalanche onset threshold for reliable bidirectional clamping |
| VWM | 15.3 V - maximum continuous reverse stand-off voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 25.2 V at 59.5 A - clamping voltage during full 1500 W surge, limiting downstream IC stress |
| PPPM | 1500 W (10/1000 μs) - peak transient energy absorption capacity for lightning and inductive switching events |
| IPPM | 59.5 A - maximum non-repetitive surge current the device safely conducts without failure |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One of two identical terminals; accepts surge current in either direction during overvoltage events |
| Cathode | Transient current exit (bidirectional) | Second identical terminal; completes low-impedance path to ground or reference rail during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial manufacturing |
| 1500 W peak pulse power | Withstands high-energy transients from load dump, ISO 7637-2 Pulse 5a, and IEC 61000-4-5 Level 4 |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes voltage overshoot during clamping, reducing stress on protected downstream components |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector or IC input pins to shunt surge energy before it reaches sensitive analog front-ends or communication PHYs. Use Value: Maintains signal integrity by limiting transient voltage to ≤25.2 V while surviving >1000 surges per AEC-Q101 test conditions. |
Use Scenario: Safeguarding differential CAN_H/CAN_L lines in factory automation gateways subject to EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Common-mode transient suppressor bridging CAN_H and CAN_L, leveraging symmetrical breakdown to absorb bidirectional line-to-line surges. Use Value: Prevents bus lockup and PHY damage by clamping differential transients within 1 ns response time and sustaining 1500 W peak power. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
|
Use Scenario: Secondary-side DC input protection in USB-C PD adapters where 12–20 V rails interface with microcontrollers and USB protocol ICs. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary filtering but before LDOs or USB controllers to intercept residual surges escaping upstream protection. Use Value: Provides precise 15.3 V standoff and 25.2 V clamping - compatible with 18 V nominal rails and avoids false triggering during normal operation. |
Use Scenario: Protecting Ethernet PHY interfaces and POTS line drivers in VoIP gateways subjected to lightning-induced longitudinal surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional suppressor mounted across line pairs (e.g., tip/ring or differential pairs) to clamp common-mode overvoltages before transformer coupling. Use Value: Delivers 1500 W surge handling with <1 ns response, meeting GR-1089-CORE Level 3 telecom surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | Lower peak power (600 W), same VBR range (17.1–18.9 V), SMB package (smaller footprint, higher thermal resistance) | Limited to lower-energy transients (IEC 61000-4-2 contact discharge only); unsuitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports) |
| 1.5KE18CA | Higher peak power (1500 W), same VBR, but axial DO-201 package - not SMT-compatible | Requires through-hole assembly; incompatible with automated SMT lines and high-density PCB layouts | Choose only for legacy repair or prototyping where SMT is unavailable and manual assembly is acceptable |
Compared with SMBJ18CA and 1.5KE18CA, the 1.5SMC18CAHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, SMC package thermal performance (RθJL = 15 °C/W), and full 1500 W surge capability in a production-ready SMT format - making it the preferred choice for automotive and industrial volume designs.
Availability
1.5SMC18CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN gateways, telecom line cards, and consumer power adapter designs requiring stable component supply with guaranteed long-term manufacturability.
Supply support for 1.5SMC18CAHM3_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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for robust, high-power transient suppression in harsh environments - emphasizing AEC-Q101 qualification, low clamping ratios, and SMT process compatibility for mission-critical automotive and industrial electronics.
FAQ
What does the "HM3" suffix indicate in 1.5SMC18CAHM3_A/H?
The "HM3" suffix in 1.5SMC18CAHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with automotive reliability standards and environmental regulations, distinguishing it from commercial-grade "M3" or non-automotive "E3" variants. This makes the 1.5SMC18CAHM3_A/H suitable for under-hood and safety-critical vehicle systems where both material content and long-term robustness are mandated.
Is 1.5SMC18CAHM3_A/H unidirectional or bidirectional?
The 1.5SMC18CAHM3_A/H is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number and verified in Vishay's 1.5SMC Series datasheet (Document Number 88303). It provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals, differential buses like CAN, or floating sensor outputs without requiring polarity-aware layout.
What is the maximum clamping voltage of 1.5SMC18CAHM3_A/H at rated surge current?
The maximum clamping voltage (VC) of 1.5SMC18CAHM3_A/H is 25.2 V at 59.5 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value is specified in the Electrical Characteristics table of the Vishay datasheet and represents the upper limit of voltage seen by protected circuitry during worst-case transient events.
Does 1.5SMC18CAHM3_A/H require a heatsink for standard operation?
No, the 1.5SMC18CAHM3_A/H does not require an external heatsink for transient suppression duty cycles (e.g., single or infrequent surges), as its thermal design relies on short-duration pulse dissipation. However, for sustained power dissipation, its RθJA is 75 °C/W and RθJL is 15 °C/W - meaning adequate PCB copper area (0.31" × 0.31" pads per terminal) is sufficient to handle repetitive surges without exceeding TJ = 150 °C.
How does the "A/H" in 1.5SMC18CAHM3_A/H affect packaging and delivery?
The "A/H" in 1.5SMC18CAHM3_A/H specifies tape-and-reel packaging: "A" indicates AEC-Q101 qualification grade, and "H" denotes 7-inch diameter plastic tape and reel containing 850 units. This format ensures compatibility with high-speed pick-and-place equipment and supports just-in-time manufacturing for automotive and industrial SMT lines using the 1.5SMC18CAHM3_A/H.
1.5SMC18CAHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC18CAHM3_A/H FAQ
1.How can I place an order for 1.5SMC18CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18CAHM3_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 1.5SMC18CAHM3_A/H reliable?
The price and inventory of 1.5SMC18CAHM3_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 1.5SMC18CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC18CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18CAHM3_A/H?
1.5SMC18CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18CAHM3_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 1.5SMC18CAHM3_A/H?
For technical support, including 1.5SMC18CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18CAHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC18CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18CAHM3_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 1.5SMC18CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC18CAHM3_A/H?
All 1.5SMC18CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18CAHM3_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 1.5SMC18CAHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC18CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18CAHM3_A/H Tags
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