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Vishay General Semiconductor - Diodes Division 1.5SMC75CAHM3_A/H
- Part No.:
- 1.5SMC75CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC75CAHM3_A/H.pdf
- Description:
- TVS DIODE 64.1VWM 104VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC75CAHM3_A/H 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 75 V standoff voltage (VWM), 82.9–91.4 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), and clamps to ≤125 V at 14.6 A peak pulse current - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC75CAHM3_A/H datasheet, 1.5SMC75CAHM3_A/H pinout, 1.5SMC75CAHM3_A/H application, or 1.5SMC75CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMC (DO-214AB) package compatibility, and thermal resistance (RθJA = 75 °C/W) under standard PCB pad layout.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding VWM (75 V), it avalanches symmetrically in both directions to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM), while the 10/1000 µs waveform rating reflects real-world lightning and inductive-switching surge immunity.
The 1.5SMC75CAHM3_A/H is halogen-free, RoHS-compliant, and AEC-Q101 qualified (automotive grade), with MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility. Its thermal design relies on 8.0 mm × 8.0 mm copper pads per terminal to sustain 6.5 W steady-state dissipation and manage junction temperature up to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 75 V - maximum continuous reverse voltage before clamping begins; defines operating margin below breakdown |
| VBR (Breakdown) | 82.9–91.4 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on under transient stress |
| VC (Clamping) | ≤125 V at IPPM = 14.6 A - peak voltage seen by protected IC/MOSFET during 10/1000 µs surge; limits stress on downstream components |
| PPPM | 1500 W - surge energy handling capacity per single 10/1000 µs pulse; supports IEC 61000-4-5 Level 4 compliance |
| ID (Leakage) | ≤1 µA at VWM - minimal DC loading on signal/power lines; preserves accuracy in high-impedance sensing paths |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8 mm × 8 mm pads; informs heatsinking requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical cathode/anode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either direction) | One of two identical terminals; accepts surge current regardless of polarity - enables bidirectional clamping without external orientation logic |
| Cathode | Transient current exit (either direction) | Electrically identical to Anode in bidirectional configuration; forms low-impedance shunt path to ground or rail during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces - supports 15-year reliability under thermal cycling and vibration |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and end-of-life disposal requirements without compromising surge performance or thermal stability |
| 1500 W peak pulse power | Withstands repeated 10/1000 µs surges up to 14.6 A - sufficient for IEC 61000-4-5 open-circuit test levels in industrial and telecom infrastructure |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for sensitive CMOS inputs |
| MSL Level 1, 260 °C reflow | Compatible with standard lead-free SMT assembly processes without pre-baking or special handling - reduces manufacturing cost and risk |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between signal line and ground/rail to divert surge energy away from precision amplifier or transceiver input stages. Use Value: Maintains signal integrity during 100 V/50 ms load dump events by clamping to ≤125 V - prevents latch-up or gate oxide damage in connected ASICs. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring transients and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or PNP/NPN input channels, mounted directly at connector entry point. Use Value: Limits transient voltage to <125 V within 1 ns, enabling reliable detection of true logic states even during 1.5 kV ring-wave surges per IEC 61000-4-12. |
| Telecom Line Interface | Power Supply Input Stage |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and PoE injectors from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage TVS in multi-tier protection scheme - absorbs bulk surge energy before secondary GDT or MOV stages. Use Value: Handles 1500 W peak pulse without degradation, reducing need for oversized secondary protectors and minimizing PCB footprint. |
Use Scenario: Protecting AC-DC converter primary-side rectifiers and DC-DC controller ICs from mains-borne transients and capacitor discharge spikes. IC Role / Device Role / Timing Role: Parallel-connected clamp across bulk capacitor or input rectifier output to suppress >75 V excursions. Use Value: Prevents overvoltage shutdown or internal FET failure in controllers like UC384x or LM5021 by limiting input rail excursions to ≤125 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA | Same VWM (75 V) and bidirectional function, but lower PPPM (600 W) and smaller SMB (DO-214AA) package - RθJA = 85 °C/W | Limited to lower-energy transients (e.g., ESD-only); unsuitable for IEC 61000-4-5 Level 3+ or automotive load dump | Select when board space is constrained and surge threat level is limited to ±15 kV contact ESD or localized switching noise. |
| 1.5KE75CA | Through-hole TO-218 package, same 75 V VWM and 1500 W rating, but higher RθJA (50 °C/W on large heatsink only) and no AEC-Q101 qualification | Requires through-hole assembly and external heatsinking; not approved for automotive under-hood use | Choose for legacy designs with through-hole constraints or where AEC-Q101 is not mandated and manual rework is acceptable. |
Compared with SMBJ75CA and 1.5KE75CA, the 1.5SMC75CAHM3_A/H uniquely combines AEC-Q101 qualification, surface-mount SMC packaging, and full 1500 W surge capability - making it the only option among the three validated for high-reliability automotive and industrial SMT production.
Availability
1.5SMC75CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor systems, industrial PLC I/O modules, telecom line interfaces, and power supply input stages requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for 1.5SMC75CAHM3_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 surface-mount transient suppression in harsh environments - balancing high surge power, compact size, and automotive-grade qualification to replace older axial or through-hole TVS solutions.
FAQ
What does the "HM3" suffix indicate in 1.5SMC75CAHM3_A/H?
The "HM3" suffix in 1.5SMC75CAHM3_A/H denotes a halogen-free, RoHS-compliant, and AEC-Q101-qualified variant. It confirms compliance with automotive reliability standards and environmental regulations, distinguishing it from commercial-grade "E3" or "M3" versions. The "_A/H" further specifies packaging: 7-inch tape-and-reel (H) with revision A. This makes 1.5SMC75CAHM3_A/H suitable for under-hood automotive applications where both material content and qualification matter.
Is 1.5SMC75CAHM3_A/H unidirectional or bidirectional?
The "CA" in 1.5SMC75CAHM3_A/H explicitly indicates a bidirectional configuration - meaning it provides symmetrical clamping in both forward and reverse directions. Unlike "A"-suffixed unidirectional parts, this device has no polarity marking and protects AC-coupled lines or differential buses (e.g., CAN, RS-485) without requiring orientation during placement. Its VBR and VC values apply identically across both polarities, as verified in Vishay's 88303 datasheet Table 1.
What is the maximum clamping voltage for 1.5SMC75CAHM3_A/H at rated surge current?
The maximum clamping voltage (VC) for 1.5SMC75CAHM3_A/H is 125 V at 14.6 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (−65 °C to +150 °C) and represents the highest voltage the protected circuit will experience during a worst-case surge event. It is critical for ensuring downstream ICs remain within their absolute maximum ratings.
Does 1.5SMC75CAHM3_A/H require a heatsink for continuous operation?
No, 1.5SMC75CAHM3_A/H does not require an external heatsink for its specified 6.5 W steady-state power dissipation (PD), provided it is mounted on the recommended 8.0 mm × 8.0 mm copper pads per terminal. Its RθJA of 75 °C/W is characterized under that layout. Adding heatsinking offers marginal improvement but is unnecessary for typical transient-duty applications where power is applied only during short pulses - not continuous DC stress.
How does the 1.5SMC75CAHM3_A/H compare to the older 1.5KE75CA in terms of PCB assembly?
The 1.5SMC75CAHM3_A/H uses an SMC (DO-214AB) surface-mount package, enabling fully automated pick-and-place and reflow soldering, whereas the 1.5KE75CA uses a through-hole DO-204AC (Axial) package requiring wave soldering or manual insertion. This makes 1.5SMC75CAHM3_A/H compatible with modern high-volume SMT lines, reduces assembly cost, eliminates via drilling, and improves mechanical reliability under vibration - all without sacrificing 1500 W surge rating.
1.5SMC75CAHM3_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):
- 64.1V
- Voltage - Breakdown (Min):
- 71.3V
- Voltage - Clamping (Max) @ Ipp:
- 104V
- Current - Peak Pulse (10/1000µs):
- 14.6A
- 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)
1.5SMC75CAHM3_A/H FAQ
1.How can I place an order for 1.5SMC75CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC75CAHM3_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 1.5SMC75CAHM3_A/H reliable?
The price and inventory of 1.5SMC75CAHM3_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 1.5SMC75CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC75CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC75CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC75CAHM3_A/H?
1.5SMC75CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC75CAHM3_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 1.5SMC75CAHM3_A/H?
For technical support, including 1.5SMC75CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC75CAHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC75CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC75CAHM3_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 1.5SMC75CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC75CAHM3_A/H?
All 1.5SMC75CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC75CAHM3_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 1.5SMC75CAHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC75CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC75CAHM3_A/H Tags
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