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Vishay General Semiconductor - Diodes Division 1.5SMC30CAHE3_A/I
- Part No.:
- 1.5SMC30CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30CAHE3_A/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,967
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Product details
Overview
1.5SMC30CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 30 V standoff voltage (VWM), 33.3 V minimum breakdown voltage (VBR), clamps transients to ≤45.7 V at 32.8 A peak pulse current (IPPM), and delivers 1500 W peak pulse power with 10/1000 μs waveform - used to protect automotive sensor signal lines, industrial I/O ports, and DC power rails against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC30CAHE3_A/I datasheet, 1.5SMC30CAHE3_A/I pinout, 1.5SMC30CAHE3_A/I application, or 1.5SMC30CAHE3_A/I equivalent, this AEC-Q101 qualified, RoHS-compliant bidirectional TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive-grade board-level ESD and surge hardening in production designs.
Technical Context
The 1.5SMC30CAHE3_A/I operates as a symmetrical avalanche diode, conducting equally in both directions when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5 %), fast response time (<1 ns), and low clamping ratio (VC/VBR ≈ 1.37) under standardized 10/1000 μs surge conditions.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device is rated for repetitive 0.01 % duty cycle surges and meets UL 497B recognition (QVGQ2) for telecom and industrial protector applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC working margin. |
| VBR (Breakdown Voltage @ 1 mA) | 33.3–36.8 V - Guaranteed avalanche initiation range; ensures predictable turn-on during transient events. |
| VC (Clamping Voltage @ IPPM) | ≤45.7 V - Peak voltage seen by protected circuit at 32.8 A surge; determines downstream component stress level. |
| IPPM (Peak Pulse Current) | 32.8 A - Maximum non-repetitive surge current survivable with 10/1000 μs waveform; validates robustness vs. IEC 61000-4-5 Level 4. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity per surge event; enables protection of 12–24 V systems against 1 kV/2 kA coupling. |
| TJmax | +150 °C - Maximum junction temperature; supports under-hood automotive and industrial ambient environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; connects across protected line (e.g., CAN_H/CAN_L or RS-485 A/B) without orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 1500 W surge capability | Enables single-device protection of differential buses (CAN, RS-485) without external polarity management. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage exposure to downstream ICs while maintaining margin above VWM. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage current under thermal cycling and humidity stress. |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive powertrain, body control, and ADAS sensor interfaces. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor supply and ground, clamping transients before they reach precision ADC inputs. Use Value: Maintains signal integrity below 45.7 V clamp during 32.8 A surges, preventing ADC saturation and sensor calibration drift. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs subjected to ground loop surges and EFT bursts. IC Role / Device Role / Timing Role: Differential pair protection between A/B lines and ground, absorbing common-mode energy without distorting data timing. Use Value: Symmetrical clamping preserves signal symmetry and common-mode rejection ratio (CMRR), avoiding communication errors during 1 kV surges. |
| DC Power Rail Protection | Telecom Line Interface |
Use Scenario: Guarding 24 V DC input rails of industrial HMIs against inductive kickback from relay coils and motor drivers. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor, diverting surge current away from upstream DC-DC converters. Use Value: 1500 W rating sustains repeated 10/1000 μs surges without degradation, extending system uptime in harsh factory environments. |
Use Scenario: UL 497B-compliant protection on telephone line interface cards in VoIP gateways and PBX systems. IC Role / Device Role / Timing Role: Primary surge suppressor on tip/ring lines, meeting telecom safety standards for lightning immunity. Use Value: Recognized under UL QVGQ2 file E136766, eliminating need for additional certification testing in end-equipment approvals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Lower PPPM (600 W), same VWM/VBR range, SMB (DO-214AA) package - 30 % smaller footprint but higher thermal resistance (RθJA = 85 °C/W). | Preferred for space-constrained consumer electronics where 600 W surge margin suffices; not AEC-Q101 qualified. | Select when board area is critical and automotive qualification is unnecessary. |
| 1.5KE33CA | Through-hole TO-218 package, identical electrical specs, higher IFSM (200 A), but incompatible with SMT assembly and lacks MSL rating. | Suitable for legacy industrial power supplies requiring manual assembly or high-reliability through-hole mounting. | Choose only if SMT is not required and existing through-hole infrastructure exists. |
Compared with SMBJ33CA and 1.5KE33CA, the 1.5SMC30CAHE3_A/I uniquely combines AEC-Q101 qualification, 1500 W SMT-compatible surge rating, and UL recognition - making it the optimal choice for new automotive and industrial designs demanding validated reliability and automated manufacturing support.
Availability
1.5SMC30CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and telecom line interfaces requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for 1.5SMC30CAHE3_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 passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for robust board-level surge protection in harsh environments, emphasizing AEC-Q101 compliance, high peak power density, and compatibility with automated SMT processes.
FAQ
What is the clamping voltage of the 1.5SMC30CAHE3_A/I at its rated peak pulse current?
The 1.5SMC30CAHE3_A/I clamps to a maximum of 45.7 V at its rated peak pulse current of 32.8 A (10/1000 μs waveform). This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC30CAHE3_A/I suitable for automotive applications?
Yes, the 1.5SMC30CAHE3_A/I is AEC-Q101 qualified (indicated by the HE3 suffix) and rated for operation from –65 °C to +150 °C. It has undergone stress testing including high-temperature reverse bias, temperature cycling, and humidity bias, making it suitable for under-hood and body electronics in passenger vehicles and commercial vehicles.
Does the 1.5SMC30CAHE3_A/I have polarity markings?
No, the 1.5SMC30CAHE3_A/I is a bidirectional TVS diode and carries no polarity marking on the SMC (DO-214AB) package. Both terminals are electrically identical, allowing flexible placement across differential signal pairs or power/ground rails without orientation constraints.
What is the maximum steady-state power dissipation of the 1.5SMC30CAHE3_A/I?
The 1.5SMC30CAHE3_A/I has a maximum steady-state power dissipation (PD) of 6.5 W at TA = 50 °C on an infinite heatsink. In typical PCB layouts with 8 mm × 8 mm copper pads per terminal, derating applies above 25 °C ambient - consult Figure 2 in the Vishay datasheet 88303 for precise thermal derating curves.
How does the 1.5SMC30CAHE3_A/I differ from unidirectional variants like 1.5SMC30AHE3_A/I?
The 1.5SMC30CAHE3_A/I is bidirectional with symmetrical breakdown in both directions, while 1.5SMC30AHE3_A/I is unidirectional and conducts only when cathode is positive relative to anode. The "C" suffix denotes bidirectionality, enabling use on AC-coupled or differential lines without polarity concerns - unlike the unidirectional version, which requires correct orientation and cannot protect against reverse-polarity surges.
1.5SMC30CAHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC30CAHE3_A/I FAQ
1.How can I place an order for 1.5SMC30CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30CAHE3_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 1.5SMC30CAHE3_A/I reliable?
The price and inventory of 1.5SMC30CAHE3_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 1.5SMC30CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC30CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30CAHE3_A/I?
1.5SMC30CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30CAHE3_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 1.5SMC30CAHE3_A/I?
For technical support, including 1.5SMC30CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30CAHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC30CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30CAHE3_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 1.5SMC30CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC30CAHE3_A/I?
All 1.5SMC30CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30CAHE3_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 1.5SMC30CAHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC30CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30CAHE3_A/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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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
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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