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Vishay General Semiconductor - Diodes Division 1.5SMC24AHM3/I
- Part No.:
- 1.5SMC24AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24AHM3/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,977
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Product details
Overview
1.5SMC24AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features 24 V breakdown voltage (VBR = 22.8–25.2 V at IT = 1.0 mA), 20.5 V stand-off voltage (VWM), 33.2 V clamping voltage (VC) at 45.2 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5SMC24AHM3/I datasheet, 1.5SMC24AHM3/I pinout, 1.5SMC24AHM3/I application, or 1.5SMC24AHM3/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, MSL Level 1 rating, and thermal resistance (RθJA = 75 °C/W) for board-level surge immunity design.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM = 20.5 V and rapidly transitions to low-impedance conduction above VBR = 22.8–25.2 V to limit transient energy. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for protecting MOSFET gates and microcontroller I/O against ESD and lightning-induced surges.
The 1.5SMC24AHM3/I is rated for 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and operates across –65 °C to +150 °C junction temperature range. Its SMC package supports automated placement and meets UL 94 V-0 flammability, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at IT = 1.0 mA - defines precise clamping onset threshold for reliable overvoltage detection |
| VWM | 20.5 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 33.2 V at 45.2 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak pulse power handling capacity under standardized surge waveform |
| IFSM | 200 A - single-cycle surge current rating (8.3 ms half-sine), supporting high-energy transients |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding PCB copper pad sizing (8.0 mm × 8.0 mm recommended) |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected circuit ground or lower-potential node in unidirectional clamp configuration |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 24 V rail) - reverse-biased during normal operation, avalanches during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A114 |
| Halogen-free & RoHS-compliant | HM3 suffix confirms full compliance with JEDEC JS709E and RoHS Directive 2011/65/EU |
| MSL Level 1 | Moisture sensitivity level 1 (peak reflow ≤260 °C), eliminating bake requirements prior to assembly |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| Glass passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term parameter stability |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 24 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a, up to 60 V/100 ms) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients before they reach LDOs or microcontrollers. Use Value: Clamps to 33.2 V at 45.2 A, preventing damage to 3.3 V/5 V logic while surviving 200 A surge events. |
Use Scenario: Analog output lines (e.g., 4–20 mA current loop) from pressure sensors in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional-capable but used unidirectionally across signal-to-ground to suppress EFT (IEC 61000-4-4) and ESD (IEC 61000-4-2). Use Value: Low clamping voltage ensures signal integrity remains within ±0.5% error band during 1 kV contact discharge events. |
| Telecom DC Power Interface | Consumer Appliance Motor Drive Protection |
Use Scenario: 24 V PoE-powered network switches with external AC/DC adapters susceptible to lightning-induced surges on input lines. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input, upstream of DC-DC converters and Ethernet PHYs. Use Value: 1500 W rating handles multi-kV induced surges; RθJA = 75 °C/W enables thermal design with minimal copper area. |
Use Scenario: Brushless DC motor control boards in HVAC systems where inductive kickback from H-bridge switching causes voltage spikes on 24 V supply rail. IC Role / Device Role / Timing Role: Rail-to-ground TVS absorbing flyback energy from MOSFET body diodes and freewheeling paths. Use Value: Fast <1 ns response captures sub-microsecond spikes; 200 A IFSM withstands repeated commutation events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-M3/57T | Lower peak power (600 W), SMB package (smaller footprint, higher RθJA = 90 °C/W) | Not AEC-Q101 qualified; suitable for commercial-grade consumer electronics only | Select when space-constrained layout permits reduced surge margin and automotive qualification is unnecessary |
| 1.5KE24A-T | Through-hole DO-201 package, same VBR/VC specs, but no AEC-Q101 or MSL Level 1 rating | Limited to non-automated production; incompatible with SMT lines and high-reliability thermal cycling | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ24A-M3/57T and 1.5KE24A-T, the 1.5SMC24AHM3/I delivers superior automotive readiness (AEC-Q101 + HM3 halogen-free), higher surge robustness (1500 W vs. 600 W), and SMT process compatibility (MSL Level 1), making it the preferred choice for volume automotive and industrial production.
Availability
1.5SMC24AHM3/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5SMC24AHM3/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, TVS, and power MOSFETs with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, surge resilience, and surface-mount manufacturability are mandatory.
FAQ
What does the "HM3" suffix mean in 1.5SMC24AHM3/I?
The HM3 suffix in 1.5SMC24AHM3/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JEDEC JS709E, RoHS Directive 2011/65/EU, and automotive reliability testing - distinct from M3 (halogen-free, commercial grade) or HE3 (RoHS, AEC-Q101, non-halogen-free) variants. This makes 1.5SMC24AHM3/I suitable for under-hood automotive use.
Is 1.5SMC24AHM3/I bidirectional or unidirectional?
The 1.5SMC24AHM3/I is a unidirectional TVS diode, as confirmed by its part number ending in "A" (not "CA") and explicit marking as unidirectional in Vishay's 1.5SMC Series datasheet. It conducts only in reverse bias during clamping and features a cathode band for polarity identification - essential for correct orientation in DC rail protection.
What is the clamping voltage of 1.5SMC24AHM3/I at its rated peak pulse current?
The clamping voltage (VC) of 1.5SMC24AHM3/I is 33.2 V at IPPM = 45.2 A, measured under the standard 10/1000 µs double-exponential surge waveform. This value defines the maximum voltage seen by downstream components during worst-case transient events and is validated per Fig. 1 and Table on page 2 of Document Number 88303.
Can 1.5SMC24AHM3/I be used in place of 1.5SMC24A-E3/57T?
Yes - 1.5SMC24AHM3/I is a direct functional and mechanical replacement for 1.5SMC24A-E3/57T in SMC (DO-214AB) footprint, sharing identical VBR, VWM, VC, and PPPM. The HM3 variant adds halogen-free content and AEC-Q101 qualification, while E3 is RoHS-compliant commercial grade. No PCB changes are needed, but HM3 offers enhanced automotive suitability.
What is the maximum operating temperature for 1.5SMC24AHM3/I?
The maximum junction temperature (TJ) for 1.5SMC24AHM3/I is +150 °C, and the storage temperature range is –65 °C to +150 °C. This rating enables deployment in engine bay ECUs and industrial controllers where ambient temperatures exceed 105 °C, provided thermal design (e.g., 8.0 mm × 8.0 mm copper pads) maintains junction temperature within limits.
1.5SMC24AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 45.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
1.5SMC24AHM3/I FAQ
1.How can I place an order for 1.5SMC24AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24AHM3/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 1.5SMC24AHM3/I reliable?
The price and inventory of 1.5SMC24AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC24AHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC24AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24AHM3/I?
1.5SMC24AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24AHM3/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 1.5SMC24AHM3/I?
For technical support, including 1.5SMC24AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC24AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24AHM3/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 1.5SMC24AHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC24AHM3/I?
All 1.5SMC24AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24AHM3/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 1.5SMC24AHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC24AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24AHM3/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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