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Vishay General Semiconductor - Diodes Division 1.5SMC24CAHE3_A/I
- Part No.:
- 1.5SMC24CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CAHE3_A/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,171
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Product details
Overview
1.5SMC24CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 33.2 V maximum clamping voltage (VC) at 45.2 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 μs). It is AEC-Q101 qualified and RoHS-compliant, deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the 1.5SMC24CAHE3_A/I datasheet, 1.5SMC24CAHE3_A/I pinout, 1.5SMC24CAHE3_A/I application, or 1.5SMC24CAHE3_A/I equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification status, SMC package thermal derating behavior, and compatibility with 10/1000 μs surge waveforms in harsh ESD/lightning environments.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering consistent clamping during positive and negative transients without polarity marking. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and fast response time (<1.0 ns), critical for protecting high-speed analog and digital signal paths.
The device sustains 1500 W peak pulse power under standardized 10/1000 μs waveform conditions with 0.01% duty cycle, and exhibits low incremental surge resistance to minimize voltage overshoot during high-current surges. Thermal resistance is rated at RθJA = 75 °C/W (typ.) on recommended 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 33.2 V at IPPM = 45.2 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 1500 W - Surge energy handling capacity under standard waveform; supports IEC 61000-4-5 Level 4 compliance. |
| ID (Reverse Leakage) | <1 μA at VWM - Minimal DC loading on signal lines; preserves integrity of low-power sensor outputs. |
| TJ max. | +150 °C - Enables operation in under-hood automotive and industrial ambient environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminals; conducts bidirectionally during overvoltage events-no cathode band or polarity identification required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without polarity concerns. |
| 1500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive end equipment. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic and microcontrollers. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without moisture sensitivity handling. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay or chassis modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±200 V transients before reaching ADC front-end or signal conditioning op-amps. Use Value: Prevents latch-up or permanent damage to 12-bit SAR ADCs and rail-to-rail op-amps operating at 3.3 V supply. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel to limit transient voltage to ≤33.2 V during 1 kV/500 A surge events. Use Value: Maintains functional safety integrity (IEC 61508 SIL2) by preventing false triggering or input stage failure in safety-critical control loops. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding RS-485 transceivers in base station remote units subjected to lightning-induced common-mode surges on twisted-pair lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair (A/B) and to ground to suppress ±4 kV contact ESD (IEC 61000-4-2) and 10/700 μs telecom surges. Use Value: Ensures >100,000 surge cycles without degradation-critical for unattended telecom infrastructure uptime. |
Use Scenario: Secondary-level protection on VBUS and D+/D− lines of USB 2.0 ports in smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF) limiting clamping voltage to 33.2 V while preserving signal integrity up to 480 Mbps. Use Value: Passes USB-IF compliance testing for eye diagram mask and jitter budget while surviving ±15 kV air discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Same VWM/VBR/VC specs but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA). | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for IEC 61000-4-5 Level 3+. | Select when board space is constrained and surge threat level is limited to ESD-only environments. |
| 1.5KE24CA | Through-hole DO-201 package; identical electrical specs but slower thermal response and no AEC-Q101 rating. | Not qualified for automotive use; requires manual insertion or wave soldering-unsuitable for high-volume SMT lines. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMAJ24CA and 1.5KE24CA, the 1.5SMC24CAHE3_A/I uniquely combines 1500 W surge capability, AEC-Q101 qualification, and SMC's optimized thermal performance-making it the preferred choice for production automotive and industrial SMT applications demanding full IEC 61000-4-5 compliance.
Availability
1.5SMC24CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer USB port protection requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC24CAHE3_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 diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The 1.5SMC Series was engineered for high-energy transient suppression in automotive, industrial, and telecom systems-prioritizing AEC-Q101 qualification, low clamping voltage, and robust SMC package thermal performance.
FAQ
What is the clamping voltage of the 1.5SMC24CAHE3_A/I under a 10/1000 μs surge?
The 1.5SMC24CAHE3_A/I clamps to a maximum of 33.2 V when subjected to its rated peak pulse current of 45.2 A under the standardized 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the 1.5SMC24CAHE3_A/I suitable for automotive applications?
Yes-the 1.5SMC24CAHE3_A/I carries AEC-Q101 qualification, confirmed in Vishay's ordering information table (Revision 09-Mar-2026, Doc. #88303), and is explicitly designated for automotive use via the "HE3" suffix. It meets requirements for engine control, body electronics, and ADAS sensor protection under temperature cycling and surge stress.
Does the 1.5SMC24CAHE3_A/I have polarity markings?
No-the 1.5SMC24CAHE3_A/I is a bidirectional TVS diode and carries no cathode band or polarity marking. Its symmetrical construction allows installation in either orientation across differential or AC-coupled signal paths without functional impact.
What is the maximum operating junction temperature for the 1.5SMC24CAHE3_A/I?
The 1.5SMC24CAHE3_A/I has a maximum junction temperature (TJ max.) of +150 °C, as specified in the "Maximum Ratings" table of Vishay document 88303. This enables reliable operation in under-hood automotive environments and high-ambient industrial enclosures.
How does the 1.5SMC24CAHE3_A/I differ from unidirectional variants like 1.5SMC24AHE3_A/I?
The 1.5SMC24CAHE3_A/I is bidirectional (denoted by "CA"), providing symmetrical clamping for both positive and negative transients, whereas 1.5SMC24AHE3_A/I is unidirectional ("A") with a cathode band and only clamps in reverse bias. The "C" suffix directly indicates bidirectional functionality per Vishay's naming convention in document 88303.
1.5SMC24CAHE3_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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45.2A
- 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)
1.5SMC24CAHE3_A/I FAQ
1.How can I place an order for 1.5SMC24CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CAHE3_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 1.5SMC24CAHE3_A/I reliable?
The price and inventory of 1.5SMC24CAHE3_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 1.5SMC24CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CAHE3_A/I?
1.5SMC24CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CAHE3_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 1.5SMC24CAHE3_A/I?
For technical support, including 1.5SMC24CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CAHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC24CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CAHE3_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 1.5SMC24CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CAHE3_A/I?
All 1.5SMC24CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CAHE3_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 1.5SMC24CAHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC24CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24CAHE3_A/I Tags
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