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Vishay General Semiconductor - Diodes Division SM6T24CAHE3_A/H
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- Part No.:
- SM6T24CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24CAHE3_A/H.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,947
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Product details
Overview
SM6T24CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 24 V standoff voltage (VWM), 27.2 V minimum breakdown voltage (VBR), 39.3 V maximum clamping voltage (VC) at 18 A IPPM, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive electronics protection.
For engineers reviewing the SM6T24CAHE3_A/H datasheet, SM6T24CAHE3_A/H pinout, SM6T24CAHE3_A/H application, or SM6T24CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.45), RoHS-compliant + AEC-Q101 qualified construction, and compatibility with automated SMT placement on PCBs requiring robust ESD and surge immunity.
Technical Context
The SM6T24CAHE3_A/H operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity dependence. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 μA at 20.5 V), while its low-inductance SMB package supports fast response to sub-microsecond surges.
Rated for 150 °C maximum junction temperature and derated above 25 °C ambient, it delivers 600 W peak pulse power under standardized 10/1000 μs waveform conditions when mounted on 5.0 mm × 5.0 mm copper pads. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation in constrained thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 27.2–30.0 V at 1 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 39.3 V at 18 A (10/1000 μs) - Peak voltage seen by protected circuit; determines safe stress level for downstream ICs/MOSFETs |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capacity; validates suitability for IEC 61000-4-5 Level 3/4 surge testing |
| ID (Reverse Leakage) | <1 μA at 20.5 V - Minimal standby current draw; preserves signal integrity and battery life in always-on systems |
| TJ max. | 150 °C - Enables deployment in under-hood automotive modules and industrial controllers with high ambient temperatures |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative surges; symmetrical with cathode for bidirectional clamping |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive surges; identical electrical behavior to anode due to bidirectional structure |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485, sensor bridges) without polarity concerns |
| 600 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive end equipment |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including body control modules, infotainment, and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected components compared to higher-ratio TVS devices |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity handling restrictions |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and engine crankshaft position sensors from load dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor output lines to limit transient excursions to ≤39.3 V. Use Value: Prevents latch-up or permanent damage to analog front-end amplifiers and microcontroller ADC inputs exposed to >100 V spikes. |
Use Scenario: Safeguarding CAN transceivers (e.g., TJA1042, SN65HVD230) against ESD and surge events on differential bus lines in factory automation networks. IC Role / Device Role / Timing Role: Low-capacitance TVS pair (one per line) maintaining signal integrity while clamping common-mode surges up to ±30 kV contact ESD. Use Value: Ensures uninterrupted CAN communication during EMC testing (IEC 61000-4-2/4-5) without bit errors or node reset. |
| Consumer Power Adapter Input | Telecom DSL Line Protection |
Use Scenario: Suppressing lightning-induced surges on AC-DC adapter primary-side rectifier outputs feeding offline SMPS controllers. IC Role / Device Role / Timing Role: Secondary-side transient suppressor placed between bridge rectifier output and bulk capacitor input to UCC28070 or similar PFC ICs. Use Value: Limits voltage overshoot during line switching events to protect 400 V-rated electrolytic capacitors and MOSFET gate drivers. |
Use Scenario: Protecting ADSL/VDSL line interface ICs (e.g., LME49710, SLICs) from induced surges on twisted-pair telephone lines exposed to outdoor environments. IC Role / Device Role / Timing Role: Bidirectional TVS installed between tip/ring lines and ground to clamp longitudinal mode transients up to 600 W. Use Value: Maintains <10 ns response time and <1 pF parasitic capacitance to avoid degrading high-frequency DSL signal integrity (up to 30 MHz). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Same SMB package, 24 V VWM, but lower PPPM (600 W same), higher VC (43.5 V @ 13.7 A), non-AEC-Q101 rated | Commercial-grade only; unsuitable for automotive under-hood use where AEC-Q101 is mandated | Select SMBJ24CA only for cost-sensitive consumer or industrial applications without automotive qualification requirements |
| 1.5KE24CA | Through-hole DO-201 package, same 24 V VWM, 600 W rating, but larger footprint and higher inductance (slower response) | Not compatible with SMT-only production; clamping performance degraded above 10 MHz due to lead inductance | Choose 1.5KE24CA only for prototyping or legacy through-hole designs where board real estate and high-frequency immunity are not critical |
Compared with SMBJ24CA and 1.5KE24CA, SM6T24CAHE3_A/H uniquely combines AEC-Q101 qualification, SMB SMT compatibility, and optimized clamping ratio (39.3 V) - making it the preferred choice for automotive and space-constrained industrial designs requiring validated reliability and minimal PCB impact.
Availability
SM6T24CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer power adapters, and telecom DSL line protection requiring stable component supply and full traceability.
Supply support for SM6T24CAHE3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, high-efficiency solutions.
The SM6T Series is engineered specifically for robust transient suppression in automotive, industrial, and telecom systems - delivering AEC-Q101-qualified, low-inductance TVS performance in compact SMB packages.
FAQ
What is the clamping voltage of SM6T24CAHE3_A/H at its rated peak pulse current?
The SM6T24CAHE3_A/H has a maximum clamping voltage (VC) of 39.3 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 18 A. This value is measured under standardized test conditions with 5.0 mm × 5.0 mm copper pads per terminal and represents the upper voltage limit imposed on protected circuitry during surge events. The SM6T24CAHE3_A/H maintains this clamping performance consistently across its qualified operating temperature range.
Is SM6T24CAHE3_A/H suitable for automotive applications?
Yes, SM6T24CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix, indicating RoHS-compliant construction with full qualification per JESD22 stress tests. It is deployed in engine control units, body electronics, and ADAS sensor modules where sustained reliability under thermal cycling, vibration, and high-energy transients is mandatory. The SM6T24CAHE3_A/H meets all required lifetime and failure rate criteria for automotive-grade TVS diodes.
What does the "CA" suffix indicate in SM6T24CAHE3_A/H?
The "CA" suffix in SM6T24CAHE3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions without polarity dependency. Unlike unidirectional variants (e.g., SM6T24A), the SM6T24CAHE3_A/H has no cathode band marking and functions identically in either orientation, simplifying layout and eliminating risk of reverse installation in AC-coupled or differential signal paths.
What is the thermal resistance of SM6T24CAHE3_A/H?
The SM6T24CAHE3_A/H exhibits a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and a junction-to-lead thermal resistance (RθJL) of 20 °C/W, measured under standard JEDEC conditions. These values assume mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Effective thermal management using internal/external copper planes is essential to maintain junction temperature below 150 °C during repeated surge events. The SM6T24CAHE3_A/H's RθJL enables efficient heat conduction into PCB traces or heatsinks.
How does SM6T24CAHE3_A/H compare to unidirectional SM6T24AHE3_A/H in circuit design?
The SM6T24CAHE3_A/H differs from SM6T24AHE3_A/H solely in polarity: SM6T24CAHE3_A/H is bidirectional with no marking and equal clamping in both directions, while SM6T24AHE3_A/H is unidirectional with a cathode band and conducts only during reverse-biased transients. In DC-biased circuits (e.g., 5 V logic lines), SM6T24AHE3_A/H offers tighter leakage control; in AC or differential lines (e.g., CAN, RS-485), SM6T24CAHE3_A/H eliminates orientation constraints and simplifies layout. Both share identical VWM, VBR, VC, and PPPM ratings.
SM6T24CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 18A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SM6T24CAHE3_A/H FAQ
1.How can I place an order for SM6T24CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24CAHE3_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 SM6T24CAHE3_A/H reliable?
The price and inventory of SM6T24CAHE3_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 SM6T24CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM6T24CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24CAHE3_A/H?
SM6T24CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24CAHE3_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 SM6T24CAHE3_A/H?
For technical support, including SM6T24CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24CAHE3_A/H requirements.
6.How does Aetrix verify that SM6T24CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T24CAHE3_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 SM6T24CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SM6T24CAHE3_A/H?
All SM6T24CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24CAHE3_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 SM6T24CAHE3_A/H part is unused and in its original packaging.
Return procedure for SM6T24CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24CAHE3_A/H Tags
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