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Vishay General Semiconductor - Diodes Division SM6T24CAHM3/H
- Part No.:
- SM6T24CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24CAHM3/H.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,160
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Product details
Overview
SM6T24CAHM3/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), 33.2 V maximum clamping voltage at 18 A peak pulse current (10/1000 μs), 600 W peak pulse power rating, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T24CAHM3/H datasheet, SM6T24CAHM3/H pinout, SM6T24CAHM3/H application, or SM6T24CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (1.38×VWM), halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on PCBs requiring IEC 61000-4-2/4-4/4-5 surge protection.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) of 26.7–29.5 V at 1 mA test current and reverse leakage ≤1 μA at 20.5 V. Its low dynamic impedance ensures rapid response to ESD and lightning-induced surges, while glass-passivated junction enhances reliability under repetitive transient stress.
The device meets J-STD-020 MSL Level 1 (260 °C reflow peak), supports 150 °C maximum junction temperature, and delivers stable clamping performance across -65 °C to +150 °C operating range - critical for under-hood automotive electronics and industrial control interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - Confirmed symmetrical breakdown in both directions; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 33.2 V at 18 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case surge; enables robust IC/MOSFET protection. |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients per IEC 61000-4-5; validated with 0.2" × 0.2" copper pad layout. |
| Package | SMB (DO-214AA) - Standard surface-mount outline with 2.20 mm max height; compatible with IPC-7351B footprint and pick-and-place equipment. |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
Pinout & Package
SMB (DO-214AA) package with center cathode/anode symmetry; bidirectional configuration has no polarity marking on body. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically in bidirectional mode; clamps positive and negative transients without external polarity assignment. |
| Case (body) | Thermal and mechanical interface | No electrical connection; provides thermal path to PCB copper pads (min. 5.0 mm × 5.0 mm per terminal) for power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, sensor differential pairs) without polarity concerns. |
| 600 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 Level 4 (4 kV surge) requirements when mounted per recommended pad layout. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Complies with automotive ELV directive and IPC-1752A material declaration requirements for Tier 1 supply chains. |
| Low clamping ratio (VC/VWM = 1.38) | Minimizes voltage overshoot during surge events, reducing risk of latch-up or gate oxide damage in downstream MOSFETs and logic ICs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C), eliminating bake requirements prior to assembly. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors exposed to load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor output lines to shunt transients before reaching signal conditioning amplifier. Use Value: Prevents false triggering and sensor failure during ISO 7637-2 Pulse 1/2a/5a events; AEC-Q101 qualification ensures long-term field reliability. |
Use Scenario: Guarding CAN_H/CAN_L differential pair against ESD and coupled surges in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance TVS connected line-to-line and line-to-ground to maintain signal integrity up to 1 Mbps data rate. Use Value: Clamps common-mode surges to <33.2 V while adding <0.5 pF parasitic capacitance - preserving CAN bus timing margins and bit error rate. |
| Consumer USB Port ESD Protection | Power Supply Input Stage |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in portable medical devices against IEC 61000-4-2 ±8 kV contact discharge. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector to divert ESD current away from USB transceiver IC. Use Value: Achieves <10 ns response time and <1 μA leakage at 20.5 V, preventing data corruption without loading high-speed signaling. |
Use Scenario: Secondary-side transient suppression on 24 V DC input rails of industrial HMIs after DC/DC conversion. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing switching spikes from relay coils and motor drivers upstream of LDO regulators. Use Value: Withstands 100 A non-repetitive forward surge (IFSM) and dissipates 5.0 W continuously, enabling compact board-level surge resilience. |
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) and VC (38.9 V @ 15.4 A), but lower PPPM (400 W); SMA package (larger footprint, higher RθJA). | Limited to lower-energy transients (IEC 61000-4-2 only); not AEC-Q101 qualified; unsuitable for automotive under-hood deployment. | Select when cost sensitivity outweighs automotive qualification and 600 W surge headroom. |
| 1.5KE24CA | Higher VWM (20.5 V same), but axial leaded DO-201 package; 1500 W PPPM but slower response due to higher inductance. | Requires through-hole assembly; incompatible with high-density SMT layouts; better suited for bulk power entry points than signal lines. | Choose for legacy designs with through-hole constraints or where higher peak power justifies manual assembly trade-offs. |
Compared with SMAJ24CA and 1.5KE24CA, SM6T24CAHM3/H delivers superior surge robustness in a compact, automotive-qualified SMT package - making it optimal for space-constrained, high-reliability signal-line protection where AEC-Q101 compliance and 600 W clamping are mandatory.
Availability
SM6T24CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN networks, consumer USB ports, and DC power input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T24CAHM3/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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SM6T Series was developed specifically for surface-mount transient suppression in space-constrained, high-surge environments - emphasizing low clamping voltage, AEC-Q101 qualification, and compatibility with automated manufacturing.
FAQ
What does the 'CA' suffix indicate in SM6T24CAHM3/H?
The 'CA' suffix in SM6T24CAHM3/H denotes a bidirectional configuration, meaning the device clamps voltage transients equally in both polarities. Unlike unidirectional variants (e.g., SM6T24A), SM6T24CAHM3/H has no cathode marking and functions symmetrically across its two terminals - essential for protecting AC-coupled or floating signal paths such as CAN bus or differential sensor outputs.
Is SM6T24CAHM3/H suitable for automotive applications?
Yes, SM6T24CAHM3/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix). It is explicitly rated for automotive use per Vishay's ordering nomenclature, supporting operation from -65 °C to +150 °C and passing rigorous stress tests including temperature cycling, HTRB, and ESD - making SM6T24CAHM3/H appropriate for engine control units, ADAS sensors, and infotainment system interfaces.
What is the maximum clamping voltage of SM6T24CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of SM6T24CAHM3/H is 33.2 V when subjected to an 18 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet (Document Number 88385) and reflects the actual voltage imposed on protected circuitry during standardized surge events - confirming SM6T24CAHM3/H's ability to hold downstream components safely below their absolute maximum ratings.
How does the SMB (DO-214AA) package of SM6T24CAHM3/H compare to SMA in size and thermal performance?
The SMB package of SM6T24CAHM3/H measures 3.94 mm × 2.20 mm × 1.75 mm (L×W×H), approximately 30% smaller in footprint than SMA (DO-214AC). Its typical junction-to-lead thermal resistance (RθJL) is 20 °C/W, enabling more efficient heat transfer to PCB copper pads than SMA's ~30 °C/W - a critical advantage for high-density layouts where thermal management and board space are constrained.
Does SM6T24CAHM3/H require special handling during PCB assembly?
No, SM6T24CAHM3/H is rated MSL Level 1 per J-STD-020 and supports standard SMT reflow profiles with a maximum peak temperature of 260 °C. Its matte tin-plated leads are solderable per J-STD-002 and JESD 22-B102, and it passes JESD 201 Class 2 whisker testing - meaning SM6T24CAHM3/H can be processed in standard high-volume assembly lines without baking, dry pack, or special flux requirements.
SM6T24CAHM3/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:
- 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 (SMB)
SM6T24CAHM3/H FAQ
1.How can I place an order for SM6T24CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24CAHM3/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 SM6T24CAHM3/H reliable?
The price and inventory of SM6T24CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24CAHM3/H is usually 5 days.
3.What payment methods are accepted for SM6T24CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24CAHM3/H?
SM6T24CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24CAHM3/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 SM6T24CAHM3/H?
For technical support, including SM6T24CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24CAHM3/H requirements.
6.How does Aetrix verify that SM6T24CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SM6T24CAHM3/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 SM6T24CAHM3/H meets industry standards.
7.What is the process for return or replacement of SM6T24CAHM3/H?
All SM6T24CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24CAHM3/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 SM6T24CAHM3/H part is unused and in its original packaging.
Return procedure for SM6T24CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24CAHM3/H Tags
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