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Vishay General Semiconductor - Diodes Division SM6T24AHE3_B/I
- Part No.:
- SM6T24AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24AHE3_B/I.pdf
- Description:
- 600W,24V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,150
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Product details
Overview
SM6T24AHE3_B/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features 24 V standoff voltage (VWM = 20.5 V), 33.2 V max clamping voltage at 18 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T24AHE3_B/I datasheet, SM6T24AHE3_B/I pinout, SM6T24AHE3_B/I application, or SM6T24AHE3_B/I equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, RoHS-compliant matte tin terminals, and suitability for automotive-grade ESD/surge protection in sensor interfaces and power rails.
Technical Context
This TVS diode operates as a fast-acting shunt clamp during overvoltage events, leveraging a glass-passivated junction for stable breakdown behavior. Its unidirectional configuration provides forward conduction only in reverse-biased fault conditions, with clamping initiated at VBR = 22.8–25.2 V (IT = 1 mA).
Thermal design relies on low RθJA = 100 °C/W and RθJL = 20 °C/W, requiring minimum 0.2" × 0.2" copper pads per terminal for rated 600 W pulse handling. It meets MSL Level 1 (260 °C reflow peak) and supports automated SMT placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 22.8 V / 25.2 V at 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM |
| VC @ IPPM | 33.2 V at 18 A (10/1000 μs) - Clamping voltage defines worst-case stress on protected IC or MOSFET |
| PPPM | 600 W - Peak surge power handling capability under standardized lightning-surge waveform |
| ID @ VWM | 1.0 μA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max. | +150 °C - Junction temperature limit enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - Validated reliability for automotive electronics per stress-test standard |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (reverse bias during clamping) | Connected to lower-potential side of protected line; forms shunt path to ground when V > VBR |
| Cathode | Forward current exit (reverse bias during clamping) | Marked end; connected to higher-potential side (e.g., supply rail or signal line); clamps to anode potential |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable breakdown voltage and long-term reliability under thermal cycling |
| 600 W peak pulse rating (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV) on 2 Ω source impedance lines |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes let-through voltage to protect sensitive 24 V logic and analog front-ends |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without popcorn or delamination risk |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamp |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and ground, activated within nanoseconds upon overvoltage. Use Value: Limits transient voltage to ≤33.2 V, preventing latch-up or gate oxide damage in 24 V-rated transceivers and ADC inputs. | Use Scenario: Safeguarding 24 V DC input rails of PLC I/O modules against 1 kV/500 A surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry, coordinated with upstream fuses and filters. Use Value: Absorbs 600 W peak energy without degradation, maintaining system uptime during factory electrical disturbances. |
| Consumer Appliance Motor Drive | Telecom Power Interface |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., HVAC blowers, washing machine pumps). IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge high-side switch, clamping inductive kickback. Use Value: Withstands 100 A IFSM surge, enabling robust protection without derating for repetitive motor commutation. | Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras, access points) 24 V auxiliary rails from lightning-induced surges on Ethernet cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on DC input stage, downstream of primary surge arrestors. Use Value: Low 1.0 μA leakage avoids loading 24 V standby supplies; RoHS-compliant HE3 suffix meets global telecom compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Same VWM (20.5 V), slightly higher VC = 38.9 V at 15.4 A; 400 W PPPM rating | Limited to non-automotive industrial use; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and higher clamping voltage is acceptable |
| 1.5SMC24A | Higher PPPM = 1500 W but larger SMC package; VC = 38.9 V at 38.8 A | Requires PCB area increase (~3× footprint); suited for high-energy surge zones (e.g., AC input) | Choose for legacy designs needing higher surge margin where space permits and AEC-Q101 is not required |
Compared with SMAJ24A and 1.5SMC24A, SM6T24AHE3_B/I delivers optimal balance of automotive qualification, compact SMB footprint, and tight 33.2 V clamping-critical for protecting modern 24 V microcontrollers and transceivers without oversizing the board.
Availability
SM6T24AHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial 24 V power rails, and consumer appliance motor drives requiring stable component supply and full traceability.
Supply support for SM6T24AHE3_B/I 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 and application-specific performance.
The SM6T Series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, low clamping, and SMT manufacturability are mandatory.
FAQ
What is the clamping voltage of SM6T24AHE3_B/I under a 10/1000 μs surge?
The SM6T24AHE3_B/I has a maximum clamping voltage (VC) of 33.2 V at 18 A peak pulse current under the standardized 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88385 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM6T24AHE3_B/I suitable for automotive applications?
Yes, SM6T24AHE3_B/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in Vishay's SM6T series datasheet (Rev. 09-Jan-2024). It is explicitly intended for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces.
What does the "_B/I" suffix mean in SM6T24AHE3_B/I?
The "_B/I" suffix indicates packaging: "B" denotes the revision code (Revision B), and "I" specifies 13-inch diameter plastic tape and reel delivery containing 3200 units. This matches Vishay's ordering information table in document 88385.
How does SM6T24AHE3_B/I differ from bidirectional variants like SM6T24CA?
SM6T24AHE3_B/I is unidirectional with cathode band marking and conducts only in reverse bias; SM6T24CA is bidirectional, lacks polarity marking, and clamps symmetrically in both directions. Their VBR and VC values differ slightly due to internal structure-SM6T24CA has dual-junction construction.
What is the thermal resistance of SM6T24AHE3_B/I, and how does it affect layout?
SM6T24AHE3_B/I has RθJA = 100 °C/W (junction-to-ambient) and RθJL = 20 °C/W (junction-to-lead). To achieve rated 600 W pulse power, Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal-underscoring the need for adequate copper area in PCB layout.
SM6T24AHE3_B/I 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T24AHE3_B/I FAQ
1.How can I place an order for SM6T24AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24AHE3_B/I 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 SM6T24AHE3_B/I reliable?
The price and inventory of SM6T24AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T24AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24AHE3_B/I?
SM6T24AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24AHE3_B/I 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 SM6T24AHE3_B/I?
For technical support, including SM6T24AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24AHE3_B/I requirements.
6.How does Aetrix verify that SM6T24AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T24AHE3_B/I 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 SM6T24AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T24AHE3_B/I?
All SM6T24AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24AHE3_B/I, 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 SM6T24AHE3_B/I part is unused and in its original packaging.
Return procedure for SM6T24AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24AHE3_B/I Tags
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