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Vishay General Semiconductor - Diodes Division 1.5SMC24CAHE3/9AT
- Part No.:
- 1.5SMC24CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CAHE3/9AT.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,250
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Product details
Overview
1.5SMC24CAHE3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 μs), and clamps transients to ≤33.2 V at 45.2 A, protecting sensitive signal lines in automotive and industrial electronics.
For engineers reviewing the 1.5SMC24CAHE3/9AT datasheet, 1.5SMC24CAHE3/9AT pinout, 1.5SMC24CAHE3/9AT application, or 1.5SMC24CAHE3/9AT equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping, low incremental surge resistance, fast response time, and RoHS-compliant matte tin-plated terminals suitable for automated placement on PCBs with 8.0 mm × 8.0 mm copper pads.
Technical Context
The 1.5SMC24CAHE3/9AT operates as a bidirectional voltage-clamping device, leveraging a glass-passivated silicon junction to suppress transient overvoltages in both polarities. Its design supports repetitive 10/1000 μs surges at 0.01% duty cycle, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads).
It meets UL 497B recognition (QVGQ2) and J-STD-020 MSL Level 1 (260 °C peak reflow), enabling use in automotive-grade assemblies. The device exhibits a temperature coefficient of VBR at +0.094 %/°C and maintains stable leakage (<1.0 μA at 20.5 V) across -65 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20.5 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR (Breakdown) | 26.7–29.5 V at 1 mA - Confirmed breakdown threshold ensuring reliable turn-on during transients |
| VC (Clamping) | ≤33.2 V at 45.2 A - Peak voltage seen by protected circuit under full-rated 10/1000 μs surge |
| PPPM | 1500 W - Surge energy handling capacity compatible with IEC 61000-4-5 Level 4 requirements |
| ID (Leakage) | ≤1.0 μA at VWM - Minimal standby current preserving signal integrity in high-impedance circuits |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 | Qualified - Validated for automotive electronic systems per stress test requirements |
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; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (bidirectional) | One end of symmetrical PN junction; no polarity marking required for bidirectional operation |
| Cathode | Current exit terminal (bidirectional) | Other end of symmetrical PN junction; identical electrical behavior to anode in reverse bias |
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 | Supports robust immunity against lightning-induced surges and inductive switching spikes per IEC 61000-4-5 |
| Fast response time | Sub-nanosecond turn-on ensures protection before downstream ICs experience overstress |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during high-di/dt events, improving protection margin |
| AEC-Q101 qualification | Validated reliability for automotive infotainment, ADAS sensor interfaces, and body control modules |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing ±100 V transients while maintaining signal fidelity below 20.5 V DC operating range. Use Value: Prevents sensor IC latch-up or damage during ISO 7637-2 Pulse 5a/b events without adding series impedance or capacitance. |
Use Scenario: Safeguarding CAN_H and CAN_L differential pair in factory automation PLCs subjected to ESD and cable discharge events. IC Role / Device Role / Timing Role: Symmetrical clamping device placed across bus lines to limit common-mode overvoltage to <33.2 V during 1 kV/500 A surges. Use Value: Maintains CAN FD signal integrity up to 5 Mbps by limiting junction capacitance and avoiding false dominant states. |
| Telecom Power Supply Input Stage | Consumer USB Port ESD Protection |
Use Scenario: Front-end surge suppression on 24 V DC input rails of VoIP gateways and base station power converters. IC Role / Device Role / Timing Role: Primary-level TVS absorbing 1500 W surges before upstream fuse or DC-DC controller. Use Value: Reduces need for secondary crowbar circuits and extends MTBF by diverting >95% of surge energy away from active components. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines in smart home hubs where space constraints preclude discrete capacitor+TVS solutions. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp integrated directly at connector footprint. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without signal degradation or timing skew on D+/D− lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Lower peak power (400 W), SMA package (smaller thermal mass), higher RθJA (110 °C/W) | Suitable only for lower-energy transients; not recommended for IEC 61000-4-5 compliance | Select when board space is critical and surge threat level is limited to ESD or low-energy switching noise |
| 1.5KE24CA | Through-hole DO-201 package, same 1500 W rating but slower thermal recovery and no AEC-Q101 qualification | Lacks automotive qualification and surface-mount compatibility; requires wave soldering | Choose for legacy through-hole designs or cost-sensitive non-automotive industrial applications |
Compared with SMAJ24CA and 1.5KE24CA, the 1.5SMC24CAHE3/9AT delivers superior thermal performance (75 °C/W vs. 110/100 °C/W), AEC-Q101 validation, and SMC package compatibility with automated SMT lines-making it optimal for new automotive and high-reliability industrial designs requiring repeatable surge immunity.
Availability
1.5SMC24CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom power inputs, and consumer USB port protection requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC24CAHE3/9AT 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 application-specific optimization.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where compact size, AEC-Q101 compliance, and 1500 W surge capability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC24CAHE3/9AT at its rated peak pulse current?
The 1.5SMC24CAHE3/9AT clamps to a maximum of 33.2 V when subjected to its rated peak pulse current of 45.2 A under the standard 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 worst-case surge events. The 1.5SMC24CAHE3/9AT achieves this with low incremental resistance, ensuring minimal overshoot beyond the clamping plateau.
Is the 1.5SMC24CAHE3/9AT suitable for automotive applications?
Yes, the 1.5SMC24CAHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix, indicating RoHS-compliant and automotive-grade construction. It has passed stress tests including temperature cycling, humidity bias, and mechanical shock per AEC-Q101 Rev D. The 1.5SMC24CAHE3/9AT is deployed in engine control modules, ADAS camera interfaces, and body electronics where ISO 7637-2 and ISO 16750-2 compliance is required.
How does the bidirectional configuration of the 1.5SMC24CAHE3/9AT affect its circuit implementation?
The 1.5SMC24CAHE3/9AT has symmetrical electrical characteristics in both directions, eliminating the need for polarity-aware placement-it connects across two nodes without cathode band orientation. This simplifies layout for AC-coupled signals like CAN, RS-485, or audio lines, and avoids misplacement errors during assembly. Unlike unidirectional variants, the 1.5SMC24CAHE3/9AT provides identical VBR, VC, and IPPM in either polarity, confirmed in Table 1 of Vishay's 88303 datasheet.
What is the thermal resistance profile of the 1.5SMC24CAHE3/9AT and how does it impact PCB layout?
The 1.5SMC24CAHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the "Mechanical Data" section. To maintain safe junction temperatures under repetitive surges, PCB layout must replicate this pad area and avoid excessive trace length or isolation. The 1.5SMC24CAHE3/9AT also has RθJL = 15 °C/W, confirming efficient heat conduction into PCB copper planes.
Does the 1.5SMC24CAHE3/9AT meet UL safety standards?
Yes, the 1.5SMC24CAHE3/9AT carries Underwriters Laboratories recognition under UL 497B (QVGQ2) for protector classification, covering both unidirectional and bidirectional configurations. This certification validates its suitability for primary- and secondary-side surge protection in telecom, industrial, and automotive equipment subject to UL 60950-1 and UL 62368-1 requirements. The 1.5SMC24CAHE3/9AT's UL file number is E136766, referenced in Vishay document 88303.
1.5SMC24CAHE3/9AT 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):
- 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)
1.5SMC24CAHE3/9AT FAQ
1.How can I place an order for 1.5SMC24CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CAHE3/9AT 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 1.5SMC24CAHE3/9AT reliable?
The price and inventory of 1.5SMC24CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC24CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CAHE3/9AT?
1.5SMC24CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CAHE3/9AT 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 1.5SMC24CAHE3/9AT?
For technical support, including 1.5SMC24CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CAHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC24CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CAHE3/9AT 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 1.5SMC24CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CAHE3/9AT?
All 1.5SMC24CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CAHE3/9AT, 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 1.5SMC24CAHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC24CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24CAHE3/9AT Tags
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