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Vishay General Semiconductor - Diodes Division SMCJ24AHM3_A/H
- Part No.:
- SMCJ24AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24AHM3_A/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,210
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Product details
Overview
SMCJ24AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) in SMC (DO-214AB) package, with 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR), 38.9 V clamping voltage (VC) at 38.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial power rails.
For engineers reviewing the SMCJ24AHM3_A/H datasheet, SMCJ24AHM3_A/H pinout, SMCJ24AHM3_A/H application, or SMCJ24AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1500 W surge capability under 10/1000 µs waveform, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per HM3 suffix.
Technical Context
The SMCJ24AHM3_A/H uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective clamping of high-energy transients before downstream components are damaged. Its unidirectional configuration provides cathode-banded polarity for DC rail protection with reverse-biased operation during overvoltage events.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets MSL level 1 (J-STD-020) and supports reflow up to 260 °C peak. The device operates across -55 °C to +150 °C junction temperature range and delivers stable clamping performance with 0.096 %/°C VBR temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping initiates; sets DC rail protection threshold. |
| VBR min/max | 26.7 V / 29.5 V - Breakdown occurs within this range at 1 mA test current; defines turn-on consistency window. |
| VC @ IPPM | 38.9 V - Clamped voltage at 38.6 A peak pulse current (10/1000 µs); determines maximum stress on protected IC. |
| PPPM | 1500 W - Peak pulse power handling under standardized 10/1000 µs waveform; quantifies transient energy absorption. |
| TJ max | +150 °C - Maximum allowable junction temperature; enables use in under-hood automotive environments. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient; informs PCB copper pad sizing and airflow requirements. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height. |
Pinout & Package
SMCJ24AHM3_A/H is housed in an SMC (DO-214AB) package with two terminals: anode and cathode. Polarity is marked by a band on the cathode end. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., 24 V rail); conducts surge current to ground when V > VBR. |
| Anode | Reference/ground return | Typically tied to system ground plane; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for Tier 1 automotive suppliers and industrial OEMs without compromising surge robustness. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio ≈ 1.45) versus standard TVS diodes, reducing voltage overshoot on sensitive loads. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning, simplifying manufacturing integration. |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/2b/5a/5b and IEC 61000-4-5 Level 4 surges on 24 V systems without degradation. |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in junction boxes, battery management modules, and lighting controllers exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp transients before they reach PMICs and microcontrollers. Use Value: Limits clamped voltage to 38.9 V during 38.6 A surges, ensuring downstream 40 V-rated MOSFETs remain within safe operating area. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor on isolated 24 V DC input circuits, paired with optocouplers and series resistors. Use Value: Absorbs 1500 W pulses without failure, maintaining signal integrity and preventing false triggering during electromagnetic interference events. |
| Automotive Sensor Signal Lines | Telecom Power Feeds |
Use Scenario: Safeguarding LIN bus or analog sensor outputs (e.g., pressure, temperature) connected to 12/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed at connector interface to shunt ESD and inductive kickback away from ADC front-ends. Use Value: Fast <1 ns response prevents latch-up in precision signal conditioning ICs while meeting ISO 10605 ±25 kV ESD immunity. | Use Scenario: Protecting 24–48 V DC power feeds to remote radio units and base station equipment in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC converters and hot-swap controllers in PoE-like infrastructure. Use Value: Handles repeated 10/1000 µs surges per IEC 61000-4-5 up to 4 kV (line-to-ground), preserving uptime in lightning-prone deployments. |
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), smaller SMA package (DO-214AC), higher RθJA (110 °C/W). | Suitable only for lower-energy transients; not recommended for automotive load dump or industrial 4 kV surge testing. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only. |
| SMCJ24AHE3_A/H | Same electrical specs and SMC package, but RoHS-compliant commercial grade (E3) instead of halogen-free (HM3); no AEC-Q101 qualification. | Lacks automotive qualification evidence; acceptable for industrial/commercial 24 V rails where AEC-Q101 is not mandated. | Choose for cost-sensitive non-automotive designs requiring identical surge performance without halogen-free requirement. |
Compared with SMCJ24AHM3_A/H, SMAJ24AHE3_A/H offers reduced surge margin and thermal derating, while SMCJ24AHE3_A/H matches performance but omits AEC-Q101 validation and halogen-free material compliance-making SMCJ24AHM3_A/H the sole option meeting full automotive production requirements.
Availability
SMCJ24AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and telecom power feed applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMCJ24AHM3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific design.
The SMCJ series targets high-energy transient suppression in harsh environments; its development prioritized automotive-grade robustness, standardized SMT compatibility, and consistent clamping performance across temperature and surge repetition.
FAQ
What is the clamping voltage of the SMCJ24AHM3_A/H at its rated peak pulse current?
The SMCJ24AHM3_A/H has a maximum clamping voltage (VC) of 38.9 V at its rated peak pulse current (IPPM) of 38.6 A under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures protected circuitry remains below critical overvoltage thresholds during surge events. The SMCJ24AHM3_A/H maintains this clamping performance across its specified operating temperature range.
Is the SMCJ24AHM3_A/H qualified for automotive applications?
Yes, the SMCJ24AHM3_A/H carries AEC-Q101 qualification, confirmed in Vishay's official documentation and ordering code structure (HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified). This makes the SMCJ24AHM3_A/H suitable for use in engine control units, body electronics, and other automotive subsystems requiring validated reliability under thermal, mechanical, and electrical stress conditions.
How does the HM3 suffix differ from the HE3 suffix in the SMCJ24A series?
The HM3 suffix indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction, whereas HE3 denotes RoHS-compliant and AEC-Q101 qualified but not halogen-free. Both share identical electrical specifications and SMC package dimensions, but SMCJ24AHM3_A/H meets stricter material content requirements for automotive Tier 1 supply chains. The SMCJ24AHM3_A/H is therefore preferred where halogen-free compliance is mandatory.
What is the thermal resistance from junction to ambient for the SMCJ24AHM3_A/H?
The SMCJ24AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. This value assumes still air conditions and directly impacts power derating above 25 °C ambient; for example, at 85 °C ambient, the device's usable power dissipation drops to approximately 3.3 W. Proper PCB layout is essential to maintain SMCJ24AHM3_A/H reliability.
Can the SMCJ24AHM3_A/H be used in bidirectional configurations?
No, the SMCJ24AHM3_A/H is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires a part with "CA" suffix (e.g., SMCJ24CA). Using SMCJ24AHM3_A/H in reverse-biased AC applications would result in forward conduction and potential failure. For bidirectional protection at 24 V standoff, select SMCJ24CAHM3_A/H instead of SMCJ24AHM3_A/H.
SMCJ24AHM3_A/H 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/H FAQ
1.How can I place an order for SMCJ24AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24AHM3_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 SMCJ24AHM3_A/H reliable?
The price and inventory of SMCJ24AHM3_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 SMCJ24AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ24AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24AHM3_A/H?
SMCJ24AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24AHM3_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 SMCJ24AHM3_A/H?
For technical support, including SMCJ24AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ24AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ24AHM3_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 SMCJ24AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ24AHM3_A/H?
All SMCJ24AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24AHM3_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 SMCJ24AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ24AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24AHM3_A/H Tags
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