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Vishay General Semiconductor - Diodes Division SMCJ24AHM3_A/I
- Part No.:
- SMCJ24AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24AHM3_A/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,290
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Product details
Overview
SMCJ24AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, designed for clamping voltage transients up to 38.9 V at 38.6 A peak pulse current, with 24 V stand-off voltage and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ24AHM3_A/I datasheet, SMCJ24AHM3_A/I pinout, SMCJ24AHM3_A/I application, or SMCJ24AHM3_A/I equivalent, key selection criteria include clamping voltage (VC = 38.9 V), breakdown voltage range (26.7–29.5 V), unidirectional polarity, AEC-Q101 qualification status, and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This TVS diode operates as a fast-acting shunt protector, responding within picoseconds to transient overvoltages induced by inductive load switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under 10/1000 μs waveform stress.
Designed for surface-mount assembly on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it supports automated placement and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. The cathode band identifies polarity; no marking is used for bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 24 V - Maximum continuous reverse operating voltage before conduction begins |
| Breakdown Voltage (VBR) | 26.7–29.5 V at 1 mA - Confirmed voltage range where device enters avalanche breakdown |
| Clamping Voltage (VC) | 38.9 V at 38.6 A - Maximum voltage seen across protected circuit during 10/1000 μs surge |
| Peak Pulse Power (PPPM) | 1500 W - Surge energy handling capability under standardized 10/1000 μs waveform |
| Junction Temperature Range | −55 °C to +150 °C - Validated operating and storage thermal envelope for automotive-grade reliability |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| AEC-Q101 Qualified | Yes - Certified for automotive electronic systems per stress test requirements |
| RoHS & Halogen-Free | Yes - HM3 suffix denotes halogen-free, RoHS-compliant construction |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or reference node; conducts during reverse transient |
| Cathode | High-side connection with polarity band marking | Connected to protected line; defines direction of clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low clamping ratio | VC/VBR ≈ 1.38 - Minimizes overvoltage stress on downstream components during surge |
| Fast response time | < 1 ps - Enables protection against nanosecond-scale ESD and switching transients |
| Low incremental surge resistance | Confirms stable clamping performance across multiple surge events without parameter drift |
| Automated placement compatibility | Standard SMC outline and matte tin plating support high-yield pick-and-place manufacturing |
| Thermal robustness | RθJL = 15 °C/W - Efficient heat transfer from junction to lead improves surge repetition capability |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 24 V supply rails in body control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt clamping element placed between power rail and chassis ground. Use Value: Limits transient voltage to ≤38.9 V, preventing damage to MCU I/O and CAN transceivers rated for 36 V max. | Use Scenario: Safeguarding gate driver inputs in variable-frequency drives exposed to inductive kickback. IC Role / Device Role / Timing Role: Bidirectional suppression not applicable; unidirectional SMCJ24AHM3_A/I placed anode-to-ground on logic-level input lines. Use Value: Clamps negative-going spikes below −0.7 V (forward VF) and positive surges to 38.9 V, preserving CMOS input integrity. |
| Telecom DC Power Feeds | Automotive Sensor Signal Lines |
Use Scenario: Securing -48 V telecom power interfaces against lightning-induced surges on central office equipment. IC Role / Device Role / Timing Role: Reverse-biased across input terminals to clamp positive transients toward ground. Use Value: Withstands 1500 W pulses while maintaining VWM = 24 V compatibility with intermediate bus regulation stages. | Use Scenario: Shielding analog outputs of pressure sensors in engine bay environments subject to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS connected cathode-to-signal line, anode-to-ground. Use Value: Delivers 38.9 V clamping at 38.6 A, ensuring sensor output stays within ADC input range during 50 V/100 ms transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AHE3_A/H | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 100 °C/W) | Suitable only for lower-energy transients; not recommended for automotive load dump | Select when board space is constrained and surge energy is ≤400 W |
| SMCJ24AHE3_A/I | Same electrical specs but RoHS-compliant commercial grade (E3), not halogen-free or AEC-Q101 qualified | Lacks automotive qualification and halogen-free certification; acceptable for industrial non-automotive use | Choose for cost-sensitive non-automotive designs requiring identical clamping performance |
Compared with SMCJ24AHM3_A/I, SMAJ24AHE3_A/H offers reduced surge capacity in a smaller package, while SMCJ24AHE3_A/I matches all electrical parameters but omits AEC-Q101 and halogen-free compliance-making the HM3 variant uniquely suited for automotive production.
Availability
SMCJ24AHM3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, telecom DC feed safeguarding, and automotive sensor interface design requiring stable component supply across extended temperature and surge conditions.
Supply support for SMCJ24AHM3_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, TVS devices, and optoelectronics with emphasis on reliability and automotive qualification.
The SMCJ series targets high-energy transient suppression in harsh environments; SMCJ24AHM3_A/I specifically serves AEC-Q101-compliant 24 V automotive subsystems needing halogen-free materials and robust 1500 W surge handling.
FAQ
What is the clamping voltage of SMCJ24AHM3_A/I at its rated peak pulse current?
The clamping voltage (VC) of SMCJ24AHM3_A/I is 38.9 V at a peak pulse current (IPPM) of 38.6 A under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal and represents the maximum voltage imposed on the protected circuit during surge conditions. SMCJ24AHM3_A/I maintains this clamping performance across its qualified temperature range.
Is SMCJ24AHM3_A/I qualified for automotive applications?
Yes, SMCJ24AHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix with "_A" revision and "/I" tape-and-reel packaging). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing-making SMCJ24AHM3_A/I suitable for under-hood and powertrain-related automotive electronics.
What does the "HM3" suffix indicate in SMCJ24AHM3_A/I?
The "HM3" suffix in SMCJ24AHM3_A/I denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-201 Class 2 whisker resistance requirements. It distinguishes this variant from E3 (RoHS-compliant commercial) and HE3/HM3 automotive grades-confirming both environmental compliance and automotive qualification when paired with "_A" revision and appropriate packaging code.
How does SMCJ24AHM3_A/I differ from bidirectional SMCJ24CA variants?
SMCJ24AHM3_A/I is unidirectional, featuring a cathode band and conducting only in reverse bias above VBR; SMCJ24CA is bidirectional with symmetrical breakdown in both directions and no polarity marking. Their clamping voltages and surge ratings are identical, but SMCJ24AHM3_A/I must be oriented correctly in-circuit, whereas SMCJ24CA can suppress transients regardless of signal polarity-critical for AC-coupled or differential lines.
What is the thermal resistance from junction to ambient for SMCJ24AHM3_A/I?
The typical junction-to-ambient thermal resistance (RθJA) of SMCJ24AHM3_A/I is 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads). This value assumes still air convection and is used to estimate junction temperature rise under steady-state power dissipation; for pulsed operation, transient thermal impedance curves (Fig. 5 in datasheet) apply instead.
SMCJ24AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 38.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ24AHM3_A/I FAQ
1.How can I place an order for SMCJ24AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24AHM3_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 SMCJ24AHM3_A/I reliable?
The price and inventory of SMCJ24AHM3_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 SMCJ24AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ24AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24AHM3_A/I?
SMCJ24AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24AHM3_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 SMCJ24AHM3_A/I?
For technical support, including SMCJ24AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24AHM3_A/I requirements.
6.How does Aetrix verify that SMCJ24AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ24AHM3_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 SMCJ24AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ24AHM3_A/I?
All SMCJ24AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24AHM3_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 SMCJ24AHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ24AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24AHM3_A/I Tags
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