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Vishay General Semiconductor - Diodes Division 1.5SMC24CAHE3_A/H
- Part No.:
- 1.5SMC24CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CAHE3_A/H.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,265
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Product details
Overview
1.5SMC24CAHE3_A/H 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 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 to ≤33.2 V at 45.2 A peak pulse current - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the 1.5SMC24CAHE3_A/H datasheet, 1.5SMC24CAHE3_A/H pinout, 1.5SMC24CAHE3_A/H application, or 1.5SMC24CAHE3_A/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), clamping behavior under lightning-induced surges, and direct alternatives with documented voltage and power trade-offs.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling transient suppression without polarity sensitivity - ideal for AC-coupled lines, differential buses, or ungrounded sensor interfaces. Its glass-passivated junction ensures stable leakage (<1 μA at 20.5 V) and fast response (<1 ns), while low incremental surge resistance maintains tight clamping during repetitive 10/1000 μs pulses at 0.01% duty cycle.
The device is rated for -65 °C to +150 °C operating junction temperature and meets J-STD-020 MSL Level 1 (260 °C peak reflow). Its AEC-Q101 qualification confirms suitability for automotive electronics, including engine control modules and ADAS sensor front-ends where reliability under thermal cycling and mechanical shock is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20.5 V - maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 26.7–29.5 V at 1 mA - guaranteed conduction onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | ≤33.2 V at 45.2 A (10/1000 μs) - peak voltage seen by protected circuit; limits stress on downstream ICs like CAN transceivers or ADC inputs. |
| PPPM | 1500 W - peak transient energy absorption capability; supports IEC 61000-4-5 Level 4 (4 kV) surge testing with proper PCB layout. |
| ID (Leakage) | ≤1 μA at VWM - negligible standby current; avoids loading of high-impedance sensor bias networks or battery-powered nodes. |
| RθJA | 75 °C/W - thermal resistance from junction to ambient; requires ≥8 mm × 8 mm copper pads per terminal for full power derating. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. No polarity marking - bidirectional operation eliminates cathode/anode distinction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as input/output for transient current; symmetrical structure enables placement without orientation check. |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal completes bidirectional clamping path; no internal polarity - identical electrical behavior in both directions. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, or ungrounded sensor pairs without polarity constraints. |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 4 kV surge (line-to-ground) when mounted on 8 mm × 8 mm copper pads - reduces need for cascaded protection stages. |
| AEC-Q101 qualification | Validated for automotive under-hood and cabin applications including engine management, infotainment, and radar sensor interfaces. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking - simplifies SMT line integration and inventory handling. |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature; prevents parameter drift in harsh environments like industrial motor drives. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure or temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor supply and ground pins to shunt transients before reaching precision amplifier or ADC. Use Value: Limits voltage excursion to ≤33.2 V during 45.2 A surges, preserving sensor accuracy and preventing latch-up in connected microcontrollers. |
Use Scenario: Safeguarding 24 V DC digital input cards in PLCs against field-wiring induced surges and inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel to clamp fast-rising transients before optocoupler or Schmitt trigger input stage. Use Value: Maintains ≤1 μA leakage at 20.5 V stand-off, avoiding false triggering while absorbing up to 1500 W of transient energy per event. |
| Telecom Line Interface | Consumer Device USB Port |
Use Scenario: Shielding RS-485 transceiver terminals in building automation gateways from lightning-induced common-mode surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional TVS placed differentially across A/B bus lines and common-mode across A-GND/B-GND to suppress both modes. Use Value: Symmetrical 26.7–29.5 V VBR ensures matched clamping in either direction, minimizing data corruption during ±1 kV EFT bursts. |
Use Scenario: Adding secondary surge protection on VBUS and D+/D− lines of USB-C ports in portable medical monitors subject to accidental hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) placed after primary ESD array to handle higher-energy surges beyond IEC 61000-4-2. Use Value: Clamps 10/1000 μs surges to ≤33.2 V without degrading signal integrity - verified for USB 2.0 eye diagram compliance at 480 Mbps. |
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 | Same VWM (20.5 V) and VC (≤38.9 V), but lower PPPM (600 W); SMB package (smaller footprint, higher RθJA = 110 °C/W). | Lower surge capacity suits consumer-grade 1 kV IEC 61000-4-5 applications; insufficient for automotive Level 4 or industrial 4 kV tests. | Select when board space is constrained and surge requirements are ≤600 W - verify thermal performance with reduced copper area. |
| 1.5KE24CA | Same VWM/VC specs, but through-hole DO-201 package; higher IPPM (63.8 A) due to better thermal mass, but not RoHS-compliant or AEC-Q101 qualified. | Lacks automotive qualification and lead-free finish; suitable only for legacy industrial equipment with manual assembly or repair scenarios. | Choose only for prototyping or non-automotive repair where SMT compatibility and regulatory compliance are not required. |
Compared with SMBJ24CA and 1.5KE24CA, the 1.5SMC24CAHE3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC package manufacturability - making it the only option qualified for volume automotive production with full 4 kV surge immunity and zero reflow restrictions.
Availability
1.5SMC24CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor systems, industrial PLC I/O modules, telecom RS-485 gateways, and consumer USB-C port protection requiring stable component supply, AEC-Q101 compliance, and 1500 W transient handling.
Supply support for 1.5SMC24CAHE3_A/H 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-power, and automotive-qualified components.
The 1.5SMC Series targets robust transient suppression in space-constrained, high-surge environments - engineered specifically for automotive, industrial, and telecom applications demanding AEC-Q101 validation and 1500 W pulse capability.
FAQ
What is the clamping voltage of the 1.5SMC24CAHE3_A/H under a 10/1000 μs surge?
The 1.5SMC24CAHE3_A/H clamps to a maximum of 33.2 V when subjected to its rated peak pulse current of 45.2 A using the standardized 10/1000 μs waveform. This value is measured at TA = 25 °C with devices mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal - critical for achieving full 1500 W rating. The 1.5SMC24CAHE3_A/H maintains this clamping performance across its qualified operating temperature range.
Is the 1.5SMC24CAHE3_A/H suitable for automotive applications?
Yes, the 1.5SMC24CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev G. The 1.5SMC24CAHE3_A/H is deployed in engine control units, ADAS camera modules, and body control modules where protection against load dump and ISO 7637-2 pulses is required.
Does the 1.5SMC24CAHE3_A/H have polarity markings?
No, the 1.5SMC24CAHE3_A/H is a bidirectional TVS and carries no polarity marking on its SMC (DO-214AB) package. Its symmetrical construction means either terminal functions identically as anode or cathode depending on transient polarity - eliminating orientation errors during automated placement and simplifying PCB layout for differential or AC-coupled lines.
What is the maximum leakage current of the 1.5SMC24CAHE3_A/H at its stand-off voltage?
The 1.5SMC24CAHE3_A/H exhibits a maximum reverse leakage current (ID) of 1 μA when biased at its rated stand-off voltage of 20.5 V and measured at TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance circuits such as sensor bias networks or battery-monitoring inputs, and remains stable over temperature due to its glass-passivated junction structure.
How does the 1.5SMC24CAHE3_A/H differ from unidirectional variants like 1.5SMC24AHE3_A/H?
The 1.5SMC24CAHE3_A/H is bidirectional with symmetrical clamping in both polarities, whereas 1.5SMC24AHE3_A/H is unidirectional and features a cathode band marking. The "CA" suffix indicates bidirectional operation - essential for protecting AC signals, RS-485 buses, or floating sensor outputs. The 1.5SMC24CAHE3_A/H has identical VWM, VBR, and VC specs but no polarity dependency, unlike the unidirectional version which conducts only in reverse bias.
1.5SMC24CAHE3_A/H 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/H FAQ
1.How can I place an order for 1.5SMC24CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CAHE3_A/H 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/H reliable?
The price and inventory of 1.5SMC24CAHE3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CAHE3_A/H?
1.5SMC24CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CAHE3_A/H 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/H?
For technical support, including 1.5SMC24CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CAHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC24CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CAHE3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CAHE3_A/H?
All 1.5SMC24CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CAHE3_A/H, 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/H part is unused and in its original packaging.
Return procedure for 1.5SMC24CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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