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Vishay General Semiconductor - Diodes Division 1.5SMC24AHM3_A/H
- Part No.:
- 1.5SMC24AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24AHM3_A/H.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,764
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Product details
Overview
1.5SMC24AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 24 V standoff voltage (VWM = 20.5 V), 33.2 V clamping voltage at 45.2 A peak pulse current, and 1500 W peak pulse power with 10/1000 μs waveform - deployed for overvoltage protection of power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the 1.5SMC24AHM3_A/H datasheet, 1.5SMC24AHM3_A/H pinout, 1.5SMC24AHM3_A/H application, or 1.5SMC24AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), low incremental surge resistance, and verified clamping performance under repetitive transients per IEC 61000-4-5.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its breakdown threshold (VBR min = 22.8 V, max = 25.2 V at 1 mA). Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response (<1.0 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
Thermally, it features RθJL = 15 °C/W and RθJA = 75 °C/W (on 8 mm × 8 mm copper pads), supporting continuous power dissipation up to 6.5 W at 50 °C ambient. The cathode-band marking confirms polarity, and MSL Level 1 rating permits standard reflow without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown) | 22.8–25.2 V at 1 mA - Confirmed avalanche initiation range under standardized test conditions |
| VC (Clamping) | 33.2 V at IPPM = 45.2 A - Measured peak voltage during 10/1000 μs transient, defining protected circuit stress limit |
| PPPM | 1500 W - Peak pulse power handling capability with industry-standard 10/1000 μs waveform |
| ID (Leakage) | <1.0 μA at VWM - Ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail); band-marked end absorbs positive transients |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Withstands severe IEC 61000-4-5 surge events (e.g., 4 kV line-to-ground) without degradation |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift across temperature and lifetime |
| MSL Level 1 | Compatible with standard Pb-free reflow profiles (peak 260 °C) without moisture sensitivity concerns |
| Halogen-free & RoHS | Meets environmental compliance requirements for automotive and industrial OEM supply chains |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS subsystems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping surges above 33.2 V. Use Value: Prevents damage to downstream regulators and microcontrollers during ISO 16750-2 load-dump events (up to 35 V, 400 ms). |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line near connector, shunting transients to ground before reaching ADC front-end. Use Value: Maintains signal fidelity with <1.0 μA leakage at 20.5 V, avoiding offset errors in precision measurement circuits. |
| Telecom Power Supply Input | Motor Drive Control Board |
Use Scenario: Safeguarding primary-side DC bus in PoE-powered telecom equipment from induced lightning surges. IC Role / Device Role / Timing Role: Primary-level TVS on 24–48 V input rail, coordinated with upstream fuses and secondary-side protection. Use Value: Delivers 1500 W pulse handling with 33.2 V clamping, limiting stress on MOSFETs and gate drivers during IEC 61000-4-5 tests. |
Use Scenario: Protecting isolated gate driver supplies in BLDC motor inverters from cross-talk and switching noise. IC Role / Device Role / Timing Role: Unidirectional clamp on auxiliary 15 V bias rail feeding optocouplers or SiC gate drivers. Use Value: Fast <1 ns response and low Rsurge minimize voltage overshoot during high-di/dt gate switching 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 |
|---|---|---|---|
| SMAJ24A | Lower PPPM (400 W), same VWM (24 V), SMA package (smaller footprint, higher RθJA) | Not AEC-Q101 qualified; suited for cost-sensitive consumer or non-automotive industrial use | Select when board space is constrained and surge energy is limited to IEC 61000-4-2 ESD only |
| 1.5KE24A | Through-hole TO-204AA (DO-41), identical electrical specs but incompatible mounting and thermal profile | Requires PCB redesign; not suitable for automated SMT assembly or high-density layouts | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMAJ24A and 1.5KE24A, the 1.5SMC24AHM3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity, SMC package thermal performance (RθJL = 15 °C/W), and halogen-free compliance - making it the preferred choice for production automotive and high-reliability industrial systems.
Availability
1.5SMC24AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drive interfaces, and telecom power supply inputs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC24AHM3_A/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 diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The 1.5SMC Series was engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where high-energy surge immunity and long-term parametric stability are critical.
FAQ
What is the clamping voltage of the 1.5SMC24AHM3_A/H under maximum surge conditions?
The 1.5SMC24AHM3_A/H exhibits a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current of 45.2 A using the standard 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC24AHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC24AHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets requirements for temperature cycling, high-temperature reverse bias, and mechanical shock - making it appropriate for engine control modules, body electronics, and ADAS power domains where reliability under extended thermal and vibration stress is mandatory.
How does the 1.5SMC24AHM3_A/H differ from the non-HM3 version?
The 1.5SMC24AHM3_A/H differs from base variants (e.g., 1.5SMC24A-E3) by incorporating halogen-free molding compound and passing AEC-Q101 stress testing. The HM3 suffix confirms compliance with automotive material restrictions and enhanced reliability validation - whereas non-HM3 versions are commercial-grade and lack formal automotive qualification, even if electrically identical.
What is the thermal resistance of the 1.5SMC24AHM3_A/H in typical PCB layout?
The 1.5SMC24AHM3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. These values assume standard SMC land patterns and enable accurate thermal modeling for continuous power dissipation up to 6.5 W at 50 °C ambient - essential for derating in enclosed or high-temperature enclosures.
Does the 1.5SMC24AHM3_A/H have polarity marking, and how is it identified?
Yes, the 1.5SMC24AHM3_A/H is unidirectional and features a visible cathode band on the SMC (DO-214AB) package body. This band identifies the cathode terminal - the side connected to the protected line (e.g., 24 V rail) - while the opposite end is the anode, typically tied to ground or return. Correct orientation is essential for proper clamping function and must be verified during layout and assembly.
1.5SMC24AHM3_A/H 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/H FAQ
1.How can I place an order for 1.5SMC24AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24AHM3_A/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 1.5SMC24AHM3_A/H reliable?
The price and inventory of 1.5SMC24AHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC24AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24AHM3_A/H?
1.5SMC24AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24AHM3_A/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 1.5SMC24AHM3_A/H?
For technical support, including 1.5SMC24AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC24AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24AHM3_A/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 1.5SMC24AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC24AHM3_A/H?
All 1.5SMC24AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24AHM3_A/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 1.5SMC24AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC24AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24AHM3_A/H Tags
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