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Vishay General Semiconductor - Diodes Division 1.5SMC75CAHM3/I
- Part No.:
- 1.5SMC75CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC75CAHM3/I.pdf
- Description:
- TVS DIODE 64.1VWM 104VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,033
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Product details
Overview
1.5SMC75CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features a 75 V standoff voltage (VWM), 82.9 V minimum breakdown voltage (VBR), 104 V maximum clamping voltage at 14.6 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 μs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the 1.5SMC75CAHM3/I datasheet, 1.5SMC75CAHM3/I pinout, 1.5SMC75CAHM3/I application, or 1.5SMC75CAHM3/I equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification, halogen-free RoHS compliance, and thermal resistance (RθJA = 75 °C/W) under PCB pad-limited conduction.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both polarities, enabling robust surge suppression without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at 64.1 V), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The 1.5SMC75CAHM3/I delivers 1500 W peak pulse power handling per 10/1000 μs waveform at 25 °C, derating linearly above TA = 25 °C per Fig. 2, and maintains clamping voltage ≤104 V up to its rated IPPM of 14.6 A - critical for safeguarding 75 V-rated CAN FD or LIN bus receivers against ISO 7637-2 pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 64.1 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC working range. |
| VBR (Breakdown) | 71.3–78.8 V at 1 mA - guaranteed avalanche initiation window; ensures predictable turn-on during transients. |
| VC (Clamping) | 104 V at 14.6 A - peak voltage seen by protected circuit during full-rated surge; determines downstream component stress. |
| PPPM | 1500 W - peak transient energy absorption capacity with 10/1000 μs waveform; meets IEC 61000-4-5 Level 4. |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient on standard 8 mm × 8 mm copper pads; governs power derating in real layouts. |
| TJ max. | +150 °C - maximum allowable junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suffix HM3 denotes qualification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); cathode band omitted for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical avalanche junction; accepts surge current regardless of polarity direction. |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical junction; completes bidirectional conduction path during either polarity surge. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines (e.g., RS-485, CAN, sensor bridges) without polarity concerns. |
| 1500 W peak pulse power | Withstands high-energy transients such as ISO 7637-2 Pulse 1/2a/5a in automotive ECUs without degradation. |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including engine control, body electronics, and ADAS sensor modules. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles; no moisture sensitivity handling required pre-assembly. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >30 kV), improving system immunity. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor supply and ground pins to limit transient excursions. Use Value: Maintains sensor signal integrity by limiting clamped voltage to ≤104 V during 14.6 A surges, preventing ADC saturation or op-amp latch-up. |
Use Scenario: Safeguarding 24 V PLC digital input channels against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals to shunt transient energy before reaching optocoupler or Schmitt trigger input. Use Value: Clamps 10/1000 μs surges to ≤104 V within nanoseconds, ensuring reliable logic-level recognition and extending input stage lifetime. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side surge protection on Ethernet PHY power rails (e.g., 3.3 V or 5 V bias supplies) in PoE-powered devices. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp suppressing common-mode transients coupled onto isolated DC rails. Use Value: Provides 1500 W surge margin while adding <10 pF capacitance, avoiding signal integrity impact on 100BASE-TX timing. |
Use Scenario: Input-stage transient suppression on universal-input (90–264 VAC) SMPS front-ends subjected to lightning-induced line surges. IC Role / Device Role / Timing Role: Primary-side clamping device across bulk capacitor or bridge rectifier outputs to absorb differential-mode surges. Use Value: Limits voltage overshoot to ≤104 V during 1.2/50 μs surges, preventing bulk capacitor overvoltage failure and MOSFET avalanche stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75CA | Lower peak power (400 W), smaller SMA package (DO-214AC), higher RθJA (~110 °C/W). | Suitable for lower-energy transients (IEC 61000-4-2 ESD only); not rated for ISO 7637-2 Pulse 5a. | Select when board space is constrained and surge threat level is limited to ESD or low-duty-cycle switching noise. |
| 1.5KE75CA | Through-hole TO-204AA (DO-41) package, same 75 V VWM, but slower response due to higher junction capacitance and inductance. | Not suitable for high-speed data line protection; better for AC mains or transformer-coupled secondary side. | Choose for legacy through-hole designs or where manual assembly and higher surge margin (1500 W) outweigh SMT requirements. |
Compared with SMAJ75CA and 1.5KE75CA, the 1.5SMC75CAHM3/I uniquely combines AEC-Q101 qualification, SMC's superior thermal dissipation (RθJA = 75 °C/W), and bidirectional 1500 W surge capability in an SMT footprint - making it optimal for next-generation automotive and industrial controllers requiring zero-layout compromise on reliability.
Availability
1.5SMC75CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom power management units, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC75CAHM3/I 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 automotive-grade validation.
The 1.5SMC Series was developed specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and 1500 W surge resilience.
FAQ
What is the clamping voltage of the 1.5SMC75CAHM3/I at its rated peak pulse current?
The 1.5SMC75CAHM3/I has a maximum clamping voltage (VC) of 104 V at its rated peak pulse current (IPPM) of 14.6 A with a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The 1.5SMC75CAHM3/I maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C), ensuring consistent protection in automotive and industrial deployments.
Is the 1.5SMC75CAHM3/I suitable for automotive applications?
Yes, the 1.5SMC75CAHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. It undergoes rigorous stress testing for temperature cycling, highly accelerated life testing (HALT), and ESD robustness. The 1.5SMC75CAHM3/I also meets MSL Level 1 for lead-free reflow compatibility and operates reliably from -65 °C to +150 °C - fulfilling under-hood environmental requirements.
How does the bidirectional design of the 1.5SMC75CAHM3/I affect its use in circuit protection?
The bidirectional design of the 1.5SMC75CAHM3/I allows it to suppress voltage transients of either polarity symmetrically, eliminating the need for polarity-aware placement or additional components in AC-coupled or floating signal paths. This makes the 1.5SMC75CAHM3/I ideal for protecting differential buses like CAN, RS-485, or sensor bridges where surge direction is unpredictable. Unlike unidirectional TVS diodes, the 1.5SMC75CAHM3/I provides identical VBR, VC, and IPPM specifications in both directions - simplifying design and reducing BOM count.
What is the thermal resistance of the 1.5SMC75CAHM3/I, and how does it impact layout design?
The 1.5SMC75CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal, as specified in the Vishay datasheet. This value directly impacts power derating: at ambient temperatures above 25 °C, the device's peak pulse power must be reduced per the derating curve in Figure 2. To achieve this RθJA, PCB layout must allocate sufficient copper area and avoid thermal bottlenecks - undersized pads or thin traces will increase effective RθJA and risk thermal runaway during repetitive surges.
Does the 1.5SMC75CAHM3/I have halogen-free and RoHS-compliant construction?
Yes, the "HM3" suffix in 1.5SMC75CAHM3/I explicitly denotes halogen-free, RoHS-compliant construction per JEDEC J-STD-609 and EU Directive 2011/65/EU. The molding compound meets UL 94 V-0 flammability rating, and terminals are matte tin-plated per J-STD-002 and JESD 22-B102. This compliance ensures environmental safety and process compatibility in modern electronics manufacturing, especially for automotive and industrial customers requiring full material declarations and supply chain traceability.
1.5SMC75CAHM3/I 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):
- 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/I FAQ
1.How can I place an order for 1.5SMC75CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC75CAHM3/I 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/I reliable?
The price and inventory of 1.5SMC75CAHM3/I 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/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC75CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC75CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC75CAHM3/I?
1.5SMC75CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC75CAHM3/I 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/I?
For technical support, including 1.5SMC75CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC75CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC75CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC75CAHM3/I 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/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC75CAHM3/I?
All 1.5SMC75CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC75CAHM3/I, 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/I part is unused and in its original packaging.
Return procedure for 1.5SMC75CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC75CAHM3/I Tags
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