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Vishay General Semiconductor - Diodes Division SM6T24AHM3_A/I
- Part No.:
- SM6T24AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24AHM3_A/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,997
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Product details
Overview
SM6T24AHM3_A/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 SM6T24AHM3_A/I datasheet, SM6T24AHM3_A/I pinout, SM6T24AHM3_A/I application, or SM6T24AHM3_A/I equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, halogen-free RoHS compliance, and suitability for automotive-grade ESD/surge protection in sensor interfaces and power rails.
Technical Context
The SM6T24AHM3_A/I operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its breakdown threshold (VBR min = 22.8 V, max = 25.2 V at 1 mA). Its low-inductance SMB package enables fast response to transients, while glass-passivated junction ensures stable leakage (<1 μA at 20.5 V) and long-term reliability under repetitive surge stress.
Thermal design relies on 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. The device is rated for TJ = −65 °C to +150 °C and meets J-STD-020 MSL Level 1 with 260 °C reflow peak.
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 - Ensures predictable turn-on within tight tolerance for robust overvoltage margin |
| VC @ IPPM | 33.2 V at 18 A (10/1000 μs) - Limits downstream IC voltage stress during surge events |
| PPPM | 600 W - Sustains high-energy transients common in automotive load-dump and inductive switching |
| ID @ VWM | <1 μA - Minimizes standby power loss and avoids false triggering in low-current circuits |
| TJ max | +150 °C - Supports operation in under-hood automotive environments and industrial enclosures |
| Package | SMB (DO-214AA) - Standard surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: SMB (DO-214AA), halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / Surge return path | Connected to ground or low-impedance reference plane; carries full transient current during clamping |
| Cathode | Protected line connection / Clamping node | Connected to line being protected (e.g., 24 V rail or sensor output); reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands automotive load-dump surges (ISO 7637-2 Pulse 5a) without degradation |
| AEC-Q101 qualified | Validated for automotive electronics including engine control units, ADAS sensors, and body controllers |
| Glass passivated junction | Ensures stable VBR and low leakage across temperature and lifetime, critical for safety-critical systems |
| Low inductance SMB package | Reduces voltage overshoot during fast transients (e.g., ESD > 30 kV), improving protection fidelity |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in vehicle ECUs against load-dump transients (up to 60 V, 400 ms) and ISO 16750-2 surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery rail and DC-DC input stage. Use Value: Limits voltage to ≤33.2 V during 18 A surge, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC modules from cable-induced surges. IC Role / Device Role / Timing Role: Line-side transient suppressor on 4–20 mA or 0–10 V signal paths interfacing with long field wiring. Use Value: Sub-μA leakage preserves signal accuracy; 33.2 V clamping prevents op-amp saturation and ADC overrange errors. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding AC/DC adapter inputs in telecom base station power supplies exposed to lightning-induced surges on primary side. IC Role / Device Role / Timing Role: Primary-side unidirectional TVS on rectified DC bus prior to bulk capacitor and controller IC. Use Value: 600 W rating handles 10/1000 μs surges up to 18 A; 150 °C max junction temp supports high-ambient deployments. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Flyback suppression diode across motor terminals or on H-bridge supply rail. Use Value: Fast clamping (<1 ns response) limits voltage spikes to safe levels for MOSFET gate drivers and logic ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5B | Same VWM (20.5 V), VC = 38.9 V at 15.4 A; 400 W PPPM; SMA package (larger RθJA) | Lower pulse power rating; less suitable for automotive load-dump; requires larger PCB area | Select if cost sensitivity outweighs surge margin and space constraints allow SMA footprint |
| 1.5SMC24A | Same VWM (20.5 V), VC = 36.0 V at 16.7 A; 1500 W PPPM; SMC package (higher thermal mass) | Higher power handling but larger size; not AEC-Q101 qualified; higher leakage (~5 μA) | Choose for industrial mains-input protection where AEC-Q101 is unnecessary and board space permits SMC |
Compared with SMAJ24A-E3/5B and 1.5SMC24A, the SM6T24AHM3_A/I delivers optimal balance of automotive qualification, compact SMB footprint, and 600 W surge capability-making it preferred for space-constrained, high-reliability 24 V system protection.
Availability
SM6T24AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power supplies, and consumer appliance motor drives requiring stable component supply and AEC-Q101 assurance.
Supply support for SM6T24AHM3_A/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, efficiency, and application-specific optimization.
The SM6T Series was engineered specifically for high-reliability transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, halogen-free construction, and precise clamping performance across 6.8 V to 220 V VWM range.
FAQ
What is the clamping voltage of SM6T24AHM3_A/I under standard surge conditions?
The SM6T24AHM3_A/I has a maximum clamping voltage (VC) of 33.2 V when subjected to an 18 A peak pulse current with a 10/1000 μs waveform. This value is measured per JEDEC standards and ensures downstream components remain within safe operating voltage limits during typical automotive and industrial transients. The SM6T24AHM3_A/I maintains this clamping performance across its specified temperature range and lifetime.
Is SM6T24AHM3_A/I suitable for automotive applications?
Yes, SM6T24AHM3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix HM3 and revision identifier "A/I". It meets stringent requirements for temperature cycling, humidity resistance, and surge endurance required in engine control, body electronics, and ADAS subsystems. The SM6T24AHM3_A/I is halogen-free and RoHS-compliant, supporting modern automotive manufacturing standards.
What does the "HM3" suffix indicate in SM6T24AHM3_A/I?
The "HM3" suffix in SM6T24AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive reliability testing protocols. The "A/I" revision code indicates the specific manufacturing lot and process revision validated for production release. SM6T24AHM3_A/I is fully traceable and documented in Vishay's automotive product portfolio.
How does SM6T24AHM3_A/I compare to bidirectional TVS diodes?
SM6T24AHM3_A/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., 24 V supply rails), offering lower leakage (<1 μA) and tighter VBR tolerance than bidirectional equivalents. Bidirectional variants (e.g., SM6T24CA) are used for AC or floating signal lines but exhibit higher leakage and symmetric clamping. The SM6T24AHM3_A/I's cathode band clearly identifies polarity, simplifying layout and reducing misapplication risk.
What PCB layout guidance applies to SM6T24AHM3_A/I?
For optimal thermal and electrical performance, SM6T24AHM3_A/I requires mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's recommended pad layout. Trace width should be ≥15 mils for surge current paths, and ground planes must be solid beneath the device. Avoid thermal reliefs on pads; use direct copper connections to maximize heat dissipation. The SM6T24AHM3_A/I's SMB footprint aligns with IPC-7351B standard dimensions for automated assembly compatibility.
SM6T24AHM3_A/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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T24AHM3_A/I FAQ
1.How can I place an order for SM6T24AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24AHM3_A/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 SM6T24AHM3_A/I reliable?
The price and inventory of SM6T24AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T24AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24AHM3_A/I?
SM6T24AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24AHM3_A/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 SM6T24AHM3_A/I?
For technical support, including SM6T24AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24AHM3_A/I requirements.
6.How does Aetrix verify that SM6T24AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T24AHM3_A/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 SM6T24AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T24AHM3_A/I?
All SM6T24AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24AHM3_A/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 SM6T24AHM3_A/I part is unused and in its original packaging.
Return procedure for SM6T24AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24AHM3_A/I Tags
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