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Vishay General Semiconductor - Diodes Division 1.5SMC30CAHM3_A/I
- Part No.:
- 1.5SMC30CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30CAHM3_A/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,588
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Product details
Overview
1.5SMC30CAHM3_A/I 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 30 V standoff voltage (VWM), 33.3 V minimum breakdown voltage (VBR), 41.4 V maximum clamping voltage (VC) at 36.2 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC30CAHM3_A/I datasheet, 1.5SMC30CAHM3_A/I pinout, 1.5SMC30CAHM3_A/I application, or 1.5SMC30CAHM3_A/I equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for high-reliability bidirectional surge suppression where low clamping ratio, fast response (<1 ns), and MSL Level 1 solderability are critical selection criteria.
Technical Context
The 1.5SMC30CAHM3_A/I operates as a symmetrical avalanche diode, conducting equally in both directions above its reverse standoff threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at 25.6 V), while its DO-214AB (SMC) package enables high thermal dissipation under repetitive transients.
Designed for unclamped inductive switching events and lightning-induced surges, it delivers consistent clamping performance across -65 °C to +150 °C operating range, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), supporting reliable operation on standard 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 25.6 V - Maximum continuous reverse voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 33.3 V min / 36.8 V max at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transient events. |
| VC (Clamping) | 41.4 V max at 36.2 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress level. |
| PPPM | 1500 W - Sustained energy-handling capacity per IEEE 62.35-compliant 10/1000 μs waveform; supports repeated surge events at 0.01% duty cycle. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; optimized for automated placement and thermal pad layout. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC specification. |
| RoHS & Halogen-Free | Compliant - Meets JEDEC J-STD-020 MSL Level 1 (260 °C peak reflow) and JESD201 Class 2 whisker resistance requirements. |
Pinout & Package
Package: SMC (DO-214AB), bidirectional configuration with no polarity marking; symmetrical terminals enable identical electrical behavior in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either direction) | One terminal of the bidirectional PN junction; conducts surge current into the device regardless of voltage polarity. |
| Cathode | Transient current exit (either direction) | Second terminal of the bidirectional PN junction; completes low-impedance path to ground or return rail during 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 | Handles severe transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave (10/700 μs). |
| Low clamping ratio (VC/VBR ≈ 1.24) | Minimizes voltage overshoot during clamping, reducing stress on downstream ICs like CAN transceivers or ADC front-ends. |
| MSL Level 1 rating | Supports lead-free reflow without preconditioning; eliminates moisture-related popcorning risk in high-volume SMT assembly. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor modules requiring long-term field reliability. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and MEMS pressure sensors from load dump and ESD in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±30 kV ESD and 100 V load dump transients before they reach transceiver ICs. Use Value: Prevents latch-up or permanent damage to automotive-grade microcontrollers and analog front-end amplifiers under harsh vehicle electrical environments. |
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from induced surges due to relay switching or nearby motor drives. IC Role / Device Role / Timing Role: Fast-clamping TVS installed across input terminals to limit transient voltage to <45 V, preserving integrity of precision op-amps and ADCs. Use Value: Maintains measurement accuracy and system uptime by preventing false triggering or reset events caused by sub-microsecond transients. |
| Telecom Line Protection | Consumer Power Adapter Output |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors against lightning-induced surges on twisted-pair cabling in outdoor access points. IC Role / Device Role / Timing Role: Bidirectional TVS used in common-mode configuration on differential pairs to suppress mode conversion transients up to 1.5 kW. Use Value: Ensures compliance with IEC 61000-4-5 Level 4 (4 kV line-earth) while preserving signal integrity through low capacitance (<100 pF at 0 V). |
Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters and wireless charging base stations exposed to output short-circuit recovery spikes. IC Role / Device Role / Timing Role: Clamping diode placed between VBUS and GND to absorb 1500 W surge energy during hot-plug or fault recovery events. Use Value: Eliminates need for redundant Zener stacks, reducing BOM count and PCB area while meeting UL 62368-1 transient immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VBR range. | Suitable for space-constrained consumer electronics but not automotive or industrial surge-heavy environments. | Select when board area is critical and surge energy is limited to <400 W (e.g., USB data lines). |
| 1.5KE33CA | Through-hole DO-201 package, identical 1500 W rating and 33 V VBR, but lacks AEC-Q101 qualification and MSL Level 1 rating. | Acceptable for non-automotive industrial controls but unsuitable for reflow-soldered automotive modules. | Choose only for legacy through-hole designs or cost-sensitive non-automotive applications where AEC-Q101 is not mandated. |
Compared with SMAJ33CA and 1.5KE33CA, the 1.5SMC30CAHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, MSL Level 1 compatibility, and SMC package thermal performance - making it the preferred choice for new automotive and high-reliability industrial designs requiring full production traceability and long-term supply continuity.
Availability
1.5SMC30CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom line interfaces, and consumer power adapter outputs requiring stable component supply, full RoHS/halogen-free compliance, and AEC-Q101 validation.
Supply support for 1.5SMC30CAHM3_A/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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 1.5SMC Series was developed to deliver high-power, surface-mount TVS protection with AEC-Q101 qualification and industry-leading clamping performance for next-generation automotive and industrial electronics.
FAQ
What is the clamping voltage of the 1.5SMC30CAHM3_A/I at its rated peak pulse current?
The 1.5SMC30CAHM3_A/I has a maximum clamping voltage (VC) of 41.4 V at 36.2 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC30CAHM3_A/I suitable for automotive applications?
Yes, the 1.5SMC30CAHM3_A/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials. Its qualification covers temperature cycling, mechanical shock, and humidity testing required for under-hood and cabin-mounted ECUs. The HM3 suffix explicitly denotes AEC-Q101 compliance, making the 1.5SMC30CAHM3_A/I appropriate for automotive powertrain, body control, and ADAS sensor protection.
What does the "CA" suffix indicate in 1.5SMC30CAHM3_A/I?
The "CA" suffix in 1.5SMC30CAHM3_A/I designates a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., "A"), the CA version provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals, transformer-isolated interfaces, or floating bus lines where voltage reversal is possible during transients.
What is the thermal resistance of the 1.5SMC30CAHM3_A/I, and how does it affect layout?
The 1.5SMC30CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads (RθJL) of 15 °C/W. To achieve rated power dissipation, the datasheet specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Reducing pad size or omitting thermal vias increases junction temperature, derating peak pulse capability - so PCB layout must follow Vishay's recommended pad dimensions for full 1500 W performance.
How does the 1.5SMC30CAHM3_A/I compare to older 1.5KE series TVS diodes?
The 1.5SMC30CAHM3_A/I replaces through-hole 1.5KE33CA with superior surface-mount performance: identical 1500 W rating and 33 V VBR, but adds AEC-Q101 qualification, MSL Level 1 reflow compatibility, halogen-free construction, and lower profile (SMC vs. DO-201). Its DO-214AB package also offers better thermal coupling to PCB copper than axial leads - enabling higher sustained surge handling in modern automated assemblies.
1.5SMC30CAHM3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 36.2A
- 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)
1.5SMC30CAHM3_A/I FAQ
1.How can I place an order for 1.5SMC30CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30CAHM3_A/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 1.5SMC30CAHM3_A/I reliable?
The price and inventory of 1.5SMC30CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC30CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC30CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30CAHM3_A/I?
1.5SMC30CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30CAHM3_A/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 1.5SMC30CAHM3_A/I?
For technical support, including 1.5SMC30CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30CAHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC30CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30CAHM3_A/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 1.5SMC30CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC30CAHM3_A/I?
All 1.5SMC30CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30CAHM3_A/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 1.5SMC30CAHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC30CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30CAHM3_A/I Tags
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DESD3V3E1BL-7B
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