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Vishay General Semiconductor - Diodes Division 1.5SMC30CAHM3/I
- Part No.:
- 1.5SMC30CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30CAHM3/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,863
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Product details
Overview
1.5SMC30CAHM3/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 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 (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers.
For engineers reviewing the 1.5SMC30CAHM3/I datasheet, 1.5SMC30CAHM3/I pinout, 1.5SMC30CAHM3/I application, or 1.5SMC30CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical reverse/forward conduction behavior due to its bidirectional structure. It responds within <1 ns to transient overvoltages and maintains low incremental surge resistance to limit clamping overshoot during 10/1000 μs surges.
Designed for mounting on standard SMC footprint pads (0.31" × 0.31"), it delivers 1500 W peak pulse power under derated conditions up to TJ = 150 °C and meets J-STD-020 MSL Level 1 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 30 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 33.3 V min - Voltage at which device begins avalanche conduction at 1 mA test current; ensures reliable turn-on before damage threshold. |
| VC (Clamping) | 41.4 V max at IPPM = 36.2 A - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge; determines downstream component stress. |
| PPPM | 1500 W - Peak transient energy absorption capacity with 10/1000 μs waveform; enables protection against lightning-induced surges per IEC 61000-4-5. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient; requires adequate PCB copper area (8.0 mm × 8.0 mm per terminal) for sustained power dissipation. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no marking required for CA-type devices. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; enables symmetrical clamping across differential or single-ended lines without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) on 2 Ω source impedance when properly laid out on recommended copper pads. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics requiring long-term field reliability. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU, China RoHS, and JEITA standards; suitable for green manufacturing programs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C), eliminating bake-out requirements prior to assembly. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) from load dump and ESD events in vehicle cabins. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor output and microcontroller input pin. Use Value: Limits transient voltage to ≤41.4 V, preventing latch-up or gate oxide damage in 3.3 V/5 V automotive MCUs while maintaining signal integrity. |
Use Scenario: Safeguarding PLC digital input channels exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across input terminals to shunt surge energy to ground. Use Value: Absorbs 1500 W surges without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 with stable clamping performance. |
| Telecom Line Driver Protection | Consumer USB Interface Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed differentially across A/B lines and common-mode across line-to-ground. Use Value: Symmetrical clamping ensures balanced suppression without skewing differential signaling; VC ≤41.4 V preserves receiver common-mode range. |
Use Scenario: Guarding USB 2.0 data lines (D+, D−) against ESD per IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) placed directly at connector to minimize stub length. Use Value: Sub-1 ns response time prevents ESD pulse propagation into PHY; bidirectional operation eliminates need for dual unidirectional devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA | Lower PPPM (600 W), same VWM (30 V), SMB package (smaller footprint, higher RθJA = 90 °C/W). | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 4 or automotive load dump. | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with reduced copper area. |
| 1.5KE30CA | Through-hole DO-201 package, same electrical specs but incompatible with SMT assembly and higher RθJA (60 °C/W on larger pad). | Not compatible with automated surface-mount production; requires wave solder or hand assembly. | Choose only for legacy through-hole designs or prototyping where rework flexibility outweighs production efficiency. |
Compared with SMBJ30CA and 1.5KE30CA, the 1.5SMC30CAHM3/I delivers higher surge robustness in an SMT-compatible, AEC-Q101-qualified package - making it optimal for volume automotive and industrial designs requiring 1500 W clamping and halogen-free compliance.
Availability
1.5SMC30CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line driver circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101 assurance.
Supply support for 1.5SMC30CAHM3/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 high-reliability, automotive-qualified components.
The 1.5SMC Series was developed for robust, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, high surge rating, and qualification consistency are critical.
FAQ
What does the "CA" suffix indicate in 1.5SMC30CAHM3/I?
The "CA" suffix in 1.5SMC30CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical clamping in both polarities, with no cathode/anode distinction. This enables use on AC signals, differential buses (e.g., RS-485), or floating nodes without orientation constraints, unlike unidirectional "A" variants that require correct polarity alignment.
Is 1.5SMC30CAHM3/I suitable for automotive applications?
Yes, 1.5SMC30CAHM3/I is AEC-Q101 qualified (indicated by the "HM3" suffix), meaning it has passed stress tests for temperature cycling, high-temperature reverse bias, and ESD required for automotive electronics. It is commonly deployed in engine control units, ADAS camera modules, and body control modules where transient immunity and long-term reliability are mandatory.
How does the SMC (DO-214AB) package of 1.5SMC30CAHM3/I compare to SMB or SOD-123 packages?
The SMC package of 1.5SMC30CAHM3/I offers higher power handling (1500 W PPPM) than SMB (600 W) or SOD-123 (<300 W) due to larger die area and superior thermal path via extended leads. Its 7.75 mm × 6.22 mm footprint supports greater copper pad area (8.0 mm × 8.0 mm), lowering RθJA to 75 °C/W - critical for sustained surge duty in industrial and automotive environments.
What is the maximum clamping voltage of 1.5SMC30CAHM3/I under surge conditions?
The maximum clamping voltage (VC) of 1.5SMC30CAHM3/I is 41.4 V at 36.2 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value represents the highest voltage imposed on the protected circuit during worst-case surge events and must be verified against downstream IC absolute maximum ratings - e.g., ensuring it stays below 45 V for 48 V-tolerant interface ICs.
Does 1.5SMC30CAHM3/I require special PCB layout considerations?
Yes, 1.5SMC30CAHM3/I requires minimum 8.0 mm × 8.0 mm copper pads per terminal to achieve rated 1500 W pulse power and maintain RθJA = 75 °C/W. Short, direct traces to ground or return paths reduce inductance and improve clamping response; avoid vias or narrow traces between the device and protected node to prevent voltage overshoot during fast transients.
1.5SMC30CAHM3/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):
- 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/I FAQ
1.How can I place an order for 1.5SMC30CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30CAHM3/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/I reliable?
The price and inventory of 1.5SMC30CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC30CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30CAHM3/I?
1.5SMC30CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30CAHM3/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/I?
For technical support, including 1.5SMC30CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC30CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC30CAHM3/I?
All 1.5SMC30CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30CAHM3/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/I part is unused and in its original packaging.
Return procedure for 1.5SMC30CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30CAHM3/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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