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Vishay General Semiconductor - Diodes Division 1.5SMC24AHM3_A/I
- Part No.:
- 1.5SMC24AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24AHM3_A/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,160
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Product details
Overview
1.5SMC24AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 24 V breakdown voltage (VBR = 22.8–25.2 V at IT = 1.0 mA), 1500 W peak pulse power (10/1000 µs), and clamps transients to ≤33.2 V at 45.2 A, making it suitable for automotive power supply input protection per ISO 7637-2.
For engineers reviewing the 1.5SMC24AHM3_A/I datasheet, 1.5SMC24AHM3_A/I pinout, 1.5SMC24AHM3_A/I application, or 1.5SMC24AHM3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 suffix, SMC (DO-214AB) package with cathode band marking, and verified clamping performance under repetitive surge conditions.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable reverse breakdown and low incremental surge resistance. Its response time is sub-nanosecond, enabling effective suppression of fast-rising ESD and lightning-induced transients.
Rated for -65 °C to +150 °C operating junction temperature, it supports high-reliability automotive applications where thermal derating above 25 °C must be applied per Figure 2. The 75 °C/W junction-to-ambient thermal resistance assumes mounting on 8.0 mm × 8.0 mm copper pads per JEDEC 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 avalanche onset window for predictable clamping threshold |
| VWM | 20.5 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | ≤33.2 V at 45.2 A - clamping voltage under full 1500 W transient, critical for downstream IC survival |
| PPPM | 1500 W (10/1000 µs waveform) - peak surge handling capacity for automotive load-dump and ISO 7637-2 pulses |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction during fault events |
| TJ max. | +150 °C - enables operation in under-hood automotive environments without thermal shutdown |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" body length and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case meeting UL 94 V-0 flammability rating; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to protected circuit ground or lower-potential rail; forms current path during transient clamp |
| Cathode | Avalanche breakdown terminal / Clamping output | Marked with band; connects to power rail or signal line being protected; sinks surge current into ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Halogen-free & RoHS-compliant (HM3) | Meets JESD201 Class 2 whisker resistance and global environmental compliance requirements |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) up to 120 V for 400 ms without failure |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during surge, reducing stress on downstream MOSFETs and controllers |
| MSL Level 1 (260 °C peak reflow) | Enables standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 24 V vehicle battery-fed ECUs against load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp surges before regulation stage. Use Value: Limits transient voltage to ≤33.2 V, preventing damage to 36 V-rated input stages while maintaining system uptime. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector interface to shunt fast transients before reaching ADC front-end. Use Value: Sub-ns response ensures clamping occurs before sensitive op-amps or SAR ADCs experience latch-up or parametric shift. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
|
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) receiving 48 V DC from switches against induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input side of DC-DC converter, coordinated with secondary-side TVS for cascaded protection. Use Value: 1500 W rating handles telecom-specific surge waveforms (IEC 61000-4-5 10/700 µs) without degradation over 100,000 cycles. |
Use Scenario: Protecting BLDC motor controller inputs in smart home appliances (e.g., washing machines) from back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Unidirectional TVS across H-bridge supply rail to absorb inductive kickback energy from motor windings. Use Value: 200 A IFSM rating accommodates repeated motor stall currents without bond-wire fusing or parameter drift. |
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-E3/57T | Same VBR range (22.8–25.2 V), but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 load dump | Select when board space is constrained and surge energy is <50 mJ; verify thermal margin with layout simulation. |
| 1.5KE24A | Through-hole TO-204AA (DO-41); identical electrical specs but no AEC-Q101 or MSL Level 1 rating | Not qualified for automotive SMT production; requires wave soldering; incompatible with automated placement | Use only in legacy industrial designs where rework tolerance and manual assembly are acceptable. |
Compared with SMAJ24A-E3/57T and 1.5KE24A, the 1.5SMC24AHM3_A/I uniquely combines AEC-Q101 qualification, 1500 W surge capability, and SMC package compatibility with high-volume SMT lines-making it the only choice for new automotive electronics requiring zero PCB changes and full compliance traceability.
Availability
1.5SMC24AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface modules, and telecom power feed applications requiring stable component supply, full AEC-Q101 documentation, and halogen-free compliance.
Supply support for 1.5SMC24AHM3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments, emphasizing AEC-Q101 qualification, high pulse power density, and process-controlled avalanche characteristics for consistent clamping behavior.
FAQ
What is the exact breakdown voltage range for 1.5SMC24AHM3_A/I?
The 1.5SMC24AHM3_A/I has a guaranteed breakdown voltage range of 22.8 V to 25.2 V at a test current of 1.0 mA, as specified in the Vishay datasheet Document Number 88303. This tight VBR window ensures repeatable clamping performance across production lots and temperature extremes, critical for protecting 24 V systems where overvoltage margins are narrow. The 1.5SMC24AHM3_A/I maintains this specification under all rated operating conditions.
Is 1.5SMC24AHM3_A/I qualified for automotive use?
Yes, the 1.5SMC24AHM3_A/I carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and full AEC-Q101 qualification per Vishay's stress test plan. It is certified for automotive applications including engine control units, body electronics, and ADAS modules where reliability under thermal cycling, humidity, and surge stress is mandatory. The 1.5SMC24AHM3_A/I meets all required lifetime and failure-rate targets defined in AEC-Q101 Rev H.
What does the "_A/I" suffix mean in 1.5SMC24AHM3_A/I?
The "_A" denotes the voltage variant (24 V nominal) within the 1.5SMC family, while "/I" specifies packaging: 3500-piece 13-inch diameter plastic tape-and-reel delivery. The "HM3" portion confirms halogen-free, RoHS-compliant materials and AEC-Q101 qualification. This full ordering code-1.5SMC24AHM3_A/I-uniquely identifies the device's electrical grade, environmental compliance, and logistics format, ensuring correct procurement and traceability for the 1.5SMC24AHM3_A/I.
How does the clamping voltage of 1.5SMC24AHM3_A/I compare to its breakdown voltage?
The 1.5SMC24AHM3_A/I clamps transients to a maximum of 33.2 V at its rated peak pulse current of 45.2 A, yielding a clamping ratio (VC/VBR) of approximately 1.46. This low ratio reflects optimized junction design and low incremental surge resistance, ensuring minimal overvoltage exposure to protected circuits. For the 1.5SMC24AHM3_A/I, this directly translates to reliable safeguarding of 36 V-rated ICs during 1500 W surges without derating headroom loss.
Can 1.5SMC24AHM3_A/I be used in bidirectional configurations?
No, the 1.5SMC24AHM3_A/I is strictly unidirectional, as indicated by the "A" suffix (not "CA"). Bidirectional variants use the "CA" suffix (e.g., 1.5SMC24CA) and exhibit symmetrical clamping in both polarities. Using the 1.5SMC24AHM3_A/I in reverse-biased AC signal paths would result in forward conduction and potential failure. Always verify polarity marking-the cathode band on the 1.5SMC24AHM3_A/I must face the positive rail being protected.
1.5SMC24AHM3_A/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:
- 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):
- 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_A/I FAQ
1.How can I place an order for 1.5SMC24AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24AHM3_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 1.5SMC24AHM3_A/I reliable?
The price and inventory of 1.5SMC24AHM3_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 1.5SMC24AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC24AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24AHM3_A/I?
1.5SMC24AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24AHM3_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 1.5SMC24AHM3_A/I?
For technical support, including 1.5SMC24AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24AHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC24AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24AHM3_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 1.5SMC24AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC24AHM3_A/I?
All 1.5SMC24AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24AHM3_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 1.5SMC24AHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC24AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24AHM3_A/I Tags
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