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Vishay General Semiconductor - Diodes Division 1.5SMC15CAHM3/H
- Part No.:
- 1.5SMC15CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15CAHM3/H.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,912
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Product details
Overview
1.5SMC15CAHM3/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 a 12.8 V stand-off voltage (VWM), 14.3–15.8 V breakdown voltage (VBR) at 1 mA, 21.2 V maximum clamping voltage (VC) at 70.8 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - ideal for automotive sensor line and industrial I/O port protection.
For engineers reviewing the 1.5SMC15CAHM3/H datasheet, 1.5SMC15CAHM3/H pinout, 1.5SMC15CAHM3/H application, or 1.5SMC15CAHM3/H equivalent, this device serves as a halogen-free, AEC-Q101 qualified TVS for high-reliability bidirectional surge suppression where low clamping voltage, fast response (<1 ns), and MSL Level 1 moisture sensitivity are critical design requirements.
Technical Context
The 1.5SMC15CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling consistent clamping performance across repetitive surges.
Designed for surface-mount automated assembly, it delivers 1500 W peak pulse power handling with 10/1000 μs waveform at ≤0.01% duty cycle, while maintaining thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads) - supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 12.8 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 14.3–15.8 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping) | 21.2 V at 70.8 A - Peak voltage seen by protected circuit during 10/1000 μs surge; limits stress on downstream ICs/MOSFETs. |
| PPPM | 1500 W - Surge energy absorption capacity under standardized 10/1000 μs waveform; enables protection against lightning-induced spikes. |
| IPPM | 70.8 A - Peak surge current capability at rated clamping voltage; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and industrial enclosures. |
| Package | SMC (DO-214AB) - Standardized 7.75 mm × 6.22 mm surface-mount outline with matte tin-plated leads; compatible with J-STD-002 soldering. |
Pinout & Package
SMC (DO-214AB) package: surface-mount, bidirectional device with no polarity marking; two terminals - anode and cathode - function identically in either direction due to symmetrical construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional) | One side of symmetrical PN junction; connects to protected line (e.g., CAN_H or RS-485 A); no cathode band marking. |
| Terminal 2 | Cathode (bidirectional) | Other side of symmetrical PN junction; connects to reference (e.g., ground or complementary line); identical electrical behavior to Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for engine control, ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-020 MSL Level 1 (260 °C peak reflow); supports lead-free manufacturing and environmental compliance programs. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 combination wave (1.2/50 μs voltage, 8/20 μs current) up to Level 4 when mounted per recommended 8.0 mm × 8.0 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes voltage overshoot during surge events; protects 12 V logic interfaces and 3.3 V/5 V microcontrollers without additional series impedance. |
| Glass-passivated junction | Ensures stable leakage (<1 μA at VWM) and repeatable breakdown over lifetime; reduces parameter drift under thermal stress. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning amplifier or ADC. Use Value: Clamps 12 V supply-line transients to ≤21.2 V, preserving sensor accuracy and preventing latch-up in downstream 5 V rail supervisors. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs subject to EFT bursts and ground potential differences. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per line) referenced to local ground, absorbing ±2 kV ESD and 4 kV EFT per IEC 61000-4-4. Use Value: Maintains signal integrity by limiting common-mode voltage excursion to <25 V, ensuring RS-485 transceiver remains within absolute maximum ratings. |
| Consumer Power Adapter Input | Telecom DSL Line Protection |
Use Scenario: Secondary-side DC input protection in wall adapters subjected to surges from shared AC mains and nearby switching loads. IC Role / Device Role / Timing Role: Standoff-rated TVS across +VOUT and GND, triggered only during overvoltage events exceeding 12.8 V. Use Value: Prevents damage to downstream DC-DC controllers and USB-PD interface ICs by clamping 1.5 kV ring wave transients to 21.2 V. |
Use Scenario: Primary protection for ADSL/VDSL line drivers connected to outdoor copper pairs vulnerable to lightning induction. IC Role / Device Role / Timing Role: Bidirectional clamp between tip/ring and ground, coordinated with gas discharge tube (GDT) upstream for staged protection. Use Value: Limits induced surge voltage to ≤21.2 V before GDT fires, protecting low-capacitance line driver ICs without degrading 30 MHz signal bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | Same VWM (12.8 V) and VC (24.4 V), but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 85 °C/W). | Lower surge rating suits consumer-grade power supplies; not recommended for automotive or industrial IEC 61000-4-5 Level 4. | Select SMBJ15CA only when board space is constrained and surge threat level is ≤600 W. |
| 1.5KE15CA | Same VWM/VC, but axial DO-201 package; higher RθJA (100 °C/W), manual assembly required, no AEC-Q101 qualification. | Limited to prototyping or non-automotive legacy designs; incompatible with automated SMT lines and high-reliability automotive BOMs. | Choose 1.5KE15CA only for through-hole evaluation or cost-sensitive non-automotive applications where AEC-Q101 is not mandated. |
Compared with SMBJ15CA and 1.5KE15CA, the 1.5SMC15CAHM3/H provides superior surge robustness (1500 W vs. 600 W or axial-limited dissipation), AEC-Q101 qualification for automotive use, and SMC package compatibility with high-volume SMT production - making it the preferred choice for mission-critical bidirectional protection where reliability and manufacturability are jointly prioritized.
Availability
1.5SMC15CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for 1.5SMC15CAHM3/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 high-reliability, automotive-qualified components.
The 1.5SMC Series was developed specifically for surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding high-power surge handling, AEC-Q101 compliance, and robust thermal performance.
FAQ
What does the 'HM3' suffix indicate in 1.5SMC15CAHM3/H?
The 'HM3' suffix in 1.5SMC15CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The 'H' indicates 7-inch tape-and-reel packaging (850 units per reel), and '/H' confirms the ordering code matches Vishay's standard halogen-free automotive-grade variant. This distinguishes it from commercial-grade 'M3' or 'E3' versions lacking automotive qualification.
Is 1.5SMC15CAHM3/H unidirectional or bidirectional?
The 1.5SMC15CAHM3/H is a bidirectional transient voltage suppressor, as confirmed by the 'CA' suffix in its part number. It provides symmetrical clamping in both polarities with no polarity marking on the SMC (DO-214AB) package - making it suitable for protecting AC-coupled lines, differential buses like CAN or RS-485, and floating sensor outputs.
What is the maximum clamping voltage of 1.5SMC15CAHM3/H at its rated peak pulse current?
The maximum clamping voltage (VC) of 1.5SMC15CAHM3/H is 21.2 V at 70.8 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88303 and defines the upper voltage limit imposed on protected circuits during worst-case surge events.
Does 1.5SMC15CAHM3/H require a heatsink for standard operation?
No, 1.5SMC15CAHM3/H does not require an external heatsink for transient suppression duty cycles (≤0.01%). Its thermal resistance is specified at 75 °C/W junction-to-ambient when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads. Continuous power dissipation is limited to 6.5 W, but typical TVS operation involves short-duration pulses - so PCB copper area alone suffices for thermal management.
How does the 1.5SMC15CAHM3/H compare to standard 1.5SMC15A in terms of automotive suitability?
Unlike the base 1.5SMC15A, the 1.5SMC15CAHM3/H carries full AEC-Q101 qualification, halogen-free materials, and MSL Level 1 reflow compatibility - making it approved for automotive powertrain, chassis, and ADAS applications. The standard 1.5SMC15A lacks automotive qualification and may not meet long-term reliability requirements in vehicle environments.
1.5SMC15CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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)
1.5SMC15CAHM3/H FAQ
1.How can I place an order for 1.5SMC15CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15CAHM3/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 1.5SMC15CAHM3/H reliable?
The price and inventory of 1.5SMC15CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC15CAHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC15CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15CAHM3/H?
1.5SMC15CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15CAHM3/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 1.5SMC15CAHM3/H?
For technical support, including 1.5SMC15CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC15CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15CAHM3/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 1.5SMC15CAHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC15CAHM3/H?
All 1.5SMC15CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15CAHM3/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 1.5SMC15CAHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC15CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC15CAHM3/H Tags
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