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Vishay General Semiconductor - Diodes Division 1.5SMC24CAHE3/57T
- Part No.:
- 1.5SMC24CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CAHE3/57T.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,944
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Product details
Overview
1.5SMC24CAHE3/57T 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, 1500 W peak pulse power (10/1000 μs), clamping voltage of 33.2 V at 45.2 A, and AEC-Q101 qualification for automotive applications.
For engineers reviewing the 1.5SMC24CAHE3/57T datasheet, 1.5SMC24CAHE3/57T pinout, 1.5SMC24CAHE3/57T application, or 1.5SMC24CAHE3/57T equivalent, this device serves as a high-reliability, surface-mount solution for protecting CAN bus interfaces, automotive sensor signal lines, and industrial I/O ports against ESD, lightning surges, and inductive switching transients.
Technical Context
The 1.5SMC24CAHE3/57T operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at 20.5 V).
It delivers 1500 W peak pulse power per the standardized 10/1000 μs waveform, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to +150 °C junction temperature. The device meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive underhood and chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20.5 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown) | 26.7–29.5 V at 1 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping) | 33.2 V at 45.2 A - Peak voltage seen by protected circuit during 1500 W surge; limits stress on downstream ICs. |
| PPPM | 1500 W - Surge energy handling capability with 10/1000 μs waveform; suitable for ISO 7637-2 Pulse 1/2/5a/b and IEC 61000-4-5 Level 4. |
| ID (Leakage) | <1 μA at VWM - Negligible standby current; avoids loading of high-impedance sensor or communication lines. |
| TJ max | +150 °C - Enables deployment in engine control units, powertrain modules, and industrial motor drives with elevated ambient temperatures. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TC, UHAST, and ESD testing; supports PPAP documentation. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, UL 94 V-0 compliant molding compound. Dimensions: 7.75 × 6.22 × 2.62 mm (L × W × H). No polarity marking - bidirectional symmetry eliminates orientation dependency during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminals; conducts equally in both directions above VBR - enables single-device protection of differential pairs or AC signals. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of RS-485, CAN, LIN, and other differential or AC-coupled interfaces without external polarity management. |
| 1500 W peak pulse rating | Withstands severe transients per ISO 7637-2 and IEC 61000-4-5 without degradation - reduces need for cascaded protection stages. |
| AEC-Q101 qualification | Validated for automotive-grade reliability across temperature cycling, humidity, and lifetime stress - supports Tier-1 BOM acceptance. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD), improving protection margin for sub-3.3 V logic interfaces. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in body control modules against load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching CAN transceiver. Use Value: Maintains signal integrity below 33.2 V clamping threshold while surviving repeated 1500 W pulses - extends transceiver lifetime in 12 V/24 V vehicle architectures. |
Use Scenario: Safeguarding 4–20 mA current loop or analog voltage outputs of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) TVS placed across sensor output terminals to suppress field-induced surges without affecting calibration. Use Value: Prevents false readings or latch-up in precision ADC front-ends by limiting transient overvoltage to ≤33.2 V with no DC loading effect. |
| Telecom Power Interface | Consumer USB Port ESD Protection |
Use Scenario: Input-stage surge suppression on PoE-powered network switches exposed to lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary clamping device on 48 V DC input rail, coordinated with upstream fuses and secondary filtering. Use Value: Absorbs multi-kW transients per IEC 61000-4-5 while maintaining <20.5 V steady-state holdoff - prevents upstream DC/DC converter shutdown. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines (D+/D−) in smart home hubs and portable audio devices. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) bidirectional clamp placed adjacent to USB connector to divert ±8 kV contact discharge. Use Value: Clamps ESD events to ≤33.2 V within nanoseconds, preserving signal rise time and meeting USB-IF compliance without adding capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA-E3/52 | Lower peak power (600 W), same VWM/VBR range, SMB package (smaller footprint, higher RθJA = 85 °C/W). | Suitable for space-constrained consumer designs with lower surge threat levels (IEC 61000-4-2 only); not rated for ISO 7637-2 Pulse 5. | Select when board area is critical and automotive qualification is unnecessary. |
| 1.5KE24CA | Through-hole TO-204AA (DO-41) package, identical electrical specs but larger size and manual assembly requirement. | Used in legacy industrial controls or prototyping where rework flexibility and thermal mass outweigh SMT density needs. | Choose for repair-friendly designs or where PCB layout cannot accommodate SMC pad geometry. |
Compared with SMBJ24CA-E3/52 and 1.5KE24CA, the 1.5SMC24CAHE3/57T uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC surface-mount compatibility - making it the preferred choice for production automotive and high-reliability industrial applications requiring validated long-term performance.
Availability
1.5SMC24CAHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom power supplies, and consumer USB interface protection requiring stable component supply and full traceability.
Supply support for 1.5SMC24CAHE3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven, standardized protection.
FAQ
What is the clamping voltage of the 1.5SMC24CAHE3/57T at its rated peak pulse current?
The 1.5SMC24CAHE3/57T has a maximum clamping voltage (VC) of 33.2 V when subjected to its peak pulse current (IPPM) of 45.2 A under the standard 10/1000 μs waveform. This value is guaranteed across temperature and lifetime, and appears in the Electrical Characteristics table of Vishay's document 88303. The 1.5SMC24CAHE3/57T maintains this clamping performance while delivering 1500 W of transient power dissipation.
Is the 1.5SMC24CAHE3/57T suitable for automotive applications?
Yes, the 1.5SMC24CAHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix, indicating RoHS-compliant and AEC-Q101 qualified construction. It meets stress test requirements for temperature cycling, humidity, and surge endurance relevant to engine control, body electronics, and infotainment systems. The 1.5SMC24CAHE3/57T is referenced in Vishay's ordering guide for automotive-grade variants.
What does the "CA" suffix mean in 1.5SMC24CAHE3/57T?
The "CA" suffix denotes a bidirectional configuration - meaning the 1.5SMC24CAHE3/57T provides symmetrical transient suppression in both polarities, with identical VBR, VC, and leakage characteristics for positive and negative surges. This eliminates the need for polarity-aware layout and makes the 1.5SMC24CAHE3/57T ideal for protecting differential buses like CAN, RS-485, and LVDS.
What is the maximum operating junction temperature for the 1.5SMC24CAHE3/57T?
The 1.5SMC24CAHE3/57T has a maximum operating junction temperature (TJ) of +150 °C, as specified in the Maximum Ratings table of Vishay document 88303. This rating allows reliable operation in under-hood automotive environments and high-temperature industrial enclosures. Derating curves in Figure 2 confirm usable power dissipation down to ambient temperatures of +125 °C when mounted per recommended pad layout.
How does the 1.5SMC24CAHE3/57T differ from unidirectional versions like 1.5SMC24AHE3/57T?
The 1.5SMC24CAHE3/57T is bidirectional (CA), while 1.5SMC24AHE3/57T is unidirectional (A). The CA version clamps equally on both polarities and has no cathode band marking; the A version has polarity-sensitive behavior and a visible cathode band. Their VWM, VBR, and VC values differ slightly - e.g., 1.5SMC24AHE3/57T lists VWM = 20.5 V (same), but VBR min = 22.8 V vs. 26.7 V for the CA variant - reflecting distinct test conditions per ANSI/IEEE C62.35.
1.5SMC24CAHE3/57T 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)
1.5SMC24CAHE3/57T FAQ
1.How can I place an order for 1.5SMC24CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CAHE3/57T 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 1.5SMC24CAHE3/57T reliable?
The price and inventory of 1.5SMC24CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC24CAHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CAHE3/57T?
1.5SMC24CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CAHE3/57T 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 1.5SMC24CAHE3/57T?
For technical support, including 1.5SMC24CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CAHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC24CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CAHE3/57T 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 1.5SMC24CAHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CAHE3/57T?
All 1.5SMC24CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CAHE3/57T, 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 1.5SMC24CAHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC24CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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