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Vishay General Semiconductor - Diodes Division SM6T24CAHE3/5B
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- Part No.:
- SM6T24CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24CAHE3/5B.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,753
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Product details
Overview
SM6T24CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 24 V standoff voltage (VWM), and clamping voltage of 33.2 V at 18 A peak pulse current. It features AEC-Q101 qualification, glass passivated junction, and low inductance for automotive-grade ESD and surge protection on signal lines.
For engineers reviewing the SM6T24CAHE3/5B datasheet, SM6T24CAHE3/5B pinout, SM6T24CAHE3/5B application, or SM6T24CAHE3/5B equivalent, key selection criteria include bidirectional clamping behavior, 24 V working voltage tolerance, AEC-Q101 compliance, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
The SM6T24CAHE3/5B operates as a bidirectional voltage-clamping device, symmetrically suppressing transients above ±24 V standoff in both polarities. Its breakdown voltage is specified at 22.8–25.2 V (min/max) with 1 mA test current, and it delivers 33.2 V clamping at 18 A IPPM under 10/1000 μs waveform.
Designed for high-reliability automotive environments, it meets MSL level 1 per J-STD-020, supports 260 °C lead-free reflow, and exhibits ≤1.0 μA reverse leakage at VWM. Its junction-to-ambient thermal resistance (100 °C/W) and 150 °C max operating temperature enable stable operation in compact, thermally constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse voltage before clamping begins; defines circuit operating margin. |
| VBR (min/max) | 22.8 V / 25.2 V - Breakdown occurs within this range at 1 mA; ensures predictable turn-on threshold. |
| VC @ IPPM | 33.2 V at 18 A - Clamped voltage during 10/1000 μs surge; protects downstream ICs from overvoltage stress. |
| PPPM | 600 W - Peak pulse power handling capability; sustains short-duration surges without failure. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; determines required PCB copper area for thermal management. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive applications. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TC, HAST, and ESD testing per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. No polarity marking on bidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; symmetrical to cathode in bidirectional operation. |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; functionally identical to anode due to bidirectional design. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| Glass passivated junction | Ensures stable VBR and low leakage over time and temperature; improves long-term reliability in harsh environments. |
| Low inductance | Minimizes voltage overshoot during fast transients (e.g., ESD), improving clamping response speed. |
| MSL Level 1 rating | Allows unlimited floor life and supports 260 °C peak reflow without baking, simplifying manufacturing flow. |
| Automated placement compatible | Standard SMB footprint and lead geometry ensure high-yield pick-and-place assembly on production lines. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector or IC input pins. Use Value: Limits transient voltage to ≤33.2 V, preventing damage to 3.3 V or 5 V ADC inputs while maintaining signal integrity. | Use Scenario: Safeguarding CANH/CANL differential pair against ESD and ISO 7637-2 pulses in vehicle body control modules. IC Role / Device Role / Timing Role: Symmetrical surge suppression device across differential bus lines. Use Value: Maintains common-mode immunity and preserves CAN signal timing by clamping surges without adding capacitance-induced skew. |
| Consumer USB Port ESD Protection | Telecom Line Card Surge Suppression |
Use Scenario: Shielding USB 2.0 D+/D− lines in portable infotainment systems from human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp integrated into USB connector footprint. Use Value: Provides <1.0 μA leakage at 24 V, ensuring no impact on USB signal rise/fall times or eye diagram integrity. | Use Scenario: Front-end protection of Ethernet PHY or xDSL line drivers exposed to lightning-induced surges on outdoor telecom equipment. IC Role / Device Role / Timing Role: Primary coarse-clamp stage before secondary TVS or GDT in multi-stage protection architecture. Use Value: Absorbs up to 600 W of surge energy, reducing stress on downstream precision protection components. |
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 (24 V), lower PPPM (400 W), SMA package (larger RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W is required | Select SM6T24CAHE3/5B when 600 W surge handling and AEC-Q101 qualification are mandatory. |
| 1.5KE24CA | Higher PPPM (1500 W), axial DO-201 package, non-SMT, no AEC-Q101 qualification | Requires through-hole assembly; incompatible with automated SMT lines and space-constrained PCBs | Choose SM6T24CAHE3/5B for surface-mount automotive designs requiring RoHS-compliant, AEC-Q101-qualified TVS. |
Compared with SMAJ24CA and 1.5KE24CA, the SM6T24CAHE3/5B uniquely combines 600 W surge rating, SMB SMT footprint, AEC-Q101 qualification, and bidirectional 24 V clamping-making it optimal for automotive and industrial SMT applications demanding reliability, density, and standardized compliance.
Availability
SM6T24CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB port protection, and telecom line card surge suppression requiring stable component supply and full traceability.
Supply support for SM6T24CAHE3/5B 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 performance.
The SM6T Series is designed specifically for robust transient voltage suppression in automotive, industrial, and communications systems-delivering high-power clamping in compact, qualified surface-mount packages like SMB.
FAQ
What does the "CA" suffix indicate in SM6T24CAHE3/5B?
The "CA" suffix denotes that the SM6T24CAHE3/5B is a bidirectional transient voltage suppressor, meaning it provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SM6T24A), the CA version has no polarity marking and functions identically in either direction-ideal for protecting AC-coupled or floating signal paths such as CAN bus or USB differential pairs.
Is SM6T24CAHE3/5B suitable for automotive applications?
Yes, the SM6T24CAHE3/5B is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It undergoes rigorous stress testing-including temperature cycling, humidity bias, and ESD-to meet automotive reliability standards. Its 150 °C max junction temperature, MSL Level 1 rating, and 260 °C reflow compatibility make it suitable for under-hood and body-control module deployments.
What is the clamping voltage of SM6T24CAHE3/5B and how is it measured?
The SM6T24CAHE3/5B has a maximum clamping voltage (VC) of 33.2 V at 18 A peak pulse current, tested with a 10/1000 μs waveform per IEC 61000-4-5. This value represents the upper voltage limit seen by protected circuitry during a standardized surge event-critical for ensuring downstream ICs (e.g., microcontrollers or transceivers) remain within their absolute maximum ratings.
How does the SMB (DO-214AA) package of SM6T24CAHE3/5B compare to SMA in size and thermal performance?
The SMB package of SM6T24CAHE3/5B measures 3.94 mm × 2.20 mm × 1.52 mm-smaller than SMA (4.57 mm × 2.79 mm × 2.30 mm)-enabling higher board density. Thermally, SMB offers RθJA = 100 °C/W (vs. ~140 °C/W for SMA), allowing better heat dissipation on standard 0.2″ × 0.2″ copper pads, which supports sustained 5.0 W power dissipation at 50 °C ambient.
Does SM6T24CAHE3/5B require external series impedance for effective protection?
No, the SM6T24CAHE3/5B functions as a shunt protector and does not require external series impedance to operate-but adding a small series resistor (e.g., 1–10 Ω) or ferrite bead upstream can improve filtering of high-frequency noise and reduce peak current stress during very fast transients. The device's low inductance and bidirectional symmetry make it effective even without added components in most automotive and industrial interface protection layouts.
SM6T24CAHE3/5B 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:
- 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):
- 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)
SM6T24CAHE3/5B FAQ
1.How can I place an order for SM6T24CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24CAHE3/5B 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 SM6T24CAHE3/5B reliable?
The price and inventory of SM6T24CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SM6T24CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24CAHE3/5B?
SM6T24CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24CAHE3/5B 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 SM6T24CAHE3/5B?
For technical support, including SM6T24CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24CAHE3/5B requirements.
6.How does Aetrix verify that SM6T24CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T24CAHE3/5B 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 SM6T24CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SM6T24CAHE3/5B?
All SM6T24CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24CAHE3/5B, 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 SM6T24CAHE3/5B part is unused and in its original packaging.
Return procedure for SM6T24CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24CAHE3/5B Tags
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