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Vishay General Semiconductor - Diodes Division SMAJ24AHE3/61
- Part No.:
- SMAJ24AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ24AHE3/61.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,152
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Product details
Overview
SMAJ24AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.9 V maximum clamping voltage (VC) at 10.3 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), commonly deployed to protect MOSFET gates and microcontroller I/O in automotive body electronics.
For engineers reviewing the SMAJ24AHE3/61 datasheet, SMAJ24AHE3/61 pinout, SMAJ24AHE3/61 application, or SMAJ24AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a shunt-clamping device: under normal conditions it presents high impedance (>1 μA leakage at 24 V), but triggers into low-impedance conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and fast response (<1 ns) to ESD and lightning-induced surges.
The SMAJ24AHE3/61 is rated for 400 W peak pulse power (derated to 300 W above 78 V), with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). Its AEC-Q101 qualification confirms suitability for automotive under-hood and infotainment systems requiring robust transient immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown window ensuring reliable turn-on without premature conduction. |
| VC @ IPPM | 38.9 V at 10.3 A - Clamped voltage during 10/1000 μs surge; determines worst-case overvoltage seen by downstream ICs. |
| PPPM | 400 W (10/1000 μs) - Surge energy handling capacity; supports protection against ISO 7637-2 Pulse 1/2a/5a in automotive environments. |
| ID @ VWM | 1.0 μA - Ultra-low reverse leakage at rated stand-off voltage, minimizing standby power loss in battery-powered systems. |
| TJ max | +150 °C - Enables operation in under-hood automotive locations and industrial motor drive control modules. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with cathode band marking; compatible with JEDEC MS-013AC footprint. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C reflow peak), RoHS-compliant and AEC-Q101 qualified. Cathode indicated by band on one end; anode is unmarked opposite terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime, with minimal parameter drift during repeated surge events. |
| 400 W peak pulse power | Supports single-event surge immunity up to IEC 61000-4-5 Level 4 (4 kV line-earth, 2 kV line-line) with proper PCB layout. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during clamping-critical for safeguarding 3.3 V or 5 V logic-level interfaces. |
| MSL Level 1 rating | Enables standard SMT reflow without moisture sensitivity concerns; no baking required prior to assembly. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting 12 V supply rail and LIN bus lines from load dump and inductive switching spikes in door module ECUs. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between power rail and chassis ground to limit transients below MCU and transceiver absolute maximum ratings. Use Value: Withstands 400 W surges while clamping to ≤38.9 V, preventing latch-up or gate oxide damage in protected 24 V-rated CAN/LIN transceivers. |
Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS connected across input optocoupler terminals to clamp reverse transients before they reach isolation barrier. Use Value: 1.0 μA leakage at 24 V avoids false triggering; 10.3 A IPPM handles typical 200–500 A/m surge coupling in factory floor environments. |
| Consumer Appliance Motor Drive | Telecom Power Supply OVP |
|
Use Scenario: Suppressing commutation spikes on BLDC motor phase outputs in smart washing machine inverters. IC Role / Device Role / Timing Role: Mounted directly at motor driver IC output pins to clamp inductive kickback before reaching gate drivers and bootstrap circuits. Use Value: Fast <1 ns response and low Rsurge ensure clamping occurs before voltage rise exceeds 40 V, preserving MOSFET avalanche margin. |
Use Scenario: Providing secondary overvoltage protection on +48 V telecom DC-DC converter outputs feeding sensitive baseband processors. IC Role / Device Role / Timing Role: Placed downstream of primary regulation to catch regulator failure or feedback loop faults causing sustained overvoltage. Use Value: 24 V VWM aligns with 48 V rail derating; 150 °C TJ max ensures reliability in sealed, thermally constrained telecom enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/61 | Commercial-grade version; lacks AEC-Q101 qualification and uses standard RoHS-compliant molding compound. | Approved for industrial and consumer equipment only-not certified for automotive production use. | Select when AEC-Q101 compliance is not required and cost optimization is prioritized. |
| SMAJ24AHM3/61 | Halogen-free, RoHS-compliant, and AEC-Q101 qualified-identical electrical specs but different material composition. | Required where halogen-free bill-of-materials (BOM) mandates apply, e.g., EU public infrastructure projects. | Choose for green-compliance-critical deployments without sacrificing automotive qualification. |
Compared with SMAJ24A-E3/61, the SMAJ24AHE3/61 adds AEC-Q101 validation for automotive use; compared with SMAJ24AHM3/61, it omits halogen-free packaging but retains full automotive qualification-making it optimal for cost-sensitive automotive Tier 2 suppliers needing verified reliability without halogen restrictions.
Availability
SMAJ24AHE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing aligned with IATF 16949 practices.
Supply support for SMAJ24AHE3/61 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade performance.
The SMAJ series delivers standardized surface-mount TVS solutions optimized for high-energy transient suppression in automotive, industrial, and communications infrastructure-designed to meet stringent AEC-Q101, IEC 61000-4-2/4-5, and ISO 7637-2 requirements.
FAQ
What is the clamping voltage of SMAJ24AHE3/61 at its rated peak pulse current?
The SMAJ24AHE3/61 has a maximum clamping voltage (VC) of 38.9 V at 10.3 A peak pulse current (IPPM), measured under the standard 10/1000 μs double-exponential surge waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMAJ24AHE3/61 achieves this clamping performance while maintaining low incremental surge resistance for effective energy diversion.
Is SMAJ24AHE3/61 suitable for automotive applications?
Yes, SMAJ24AHE3/61 is AEC-Q101 qualified, making it suitable for automotive applications including body control modules, infotainment systems, and ADAS sensor interfaces. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and guaranteed operation from –55 °C to +150 °C junction temperature-all validated per AEC-Q101 stress test requirements. The "HE3" suffix explicitly denotes this automotive qualification, distinguishing it from commercial-grade variants like SMAJ24A-E3/61.
How does the unidirectional configuration of SMAJ24AHE3/61 affect its circuit placement?
The unidirectional configuration of SMAJ24AHE3/61 requires correct polarity orientation: the banded end (cathode) must connect to the line being protected, and the unbanded end (anode) to ground or reference potential. This arrangement allows forward conduction only during negative transients relative to ground-ideal for DC power rails and single-polarity signal lines. Unlike bidirectional types, SMAJ24AHE3/61 blocks positive surges above VWM but conducts reverse surges above VBR, enabling precise protection alignment in asymmetric voltage domains.
What is the maximum steady-state power dissipation of SMAJ24AHE3/61?
The SMAJ24AHE3/61 has a maximum steady-state power dissipation (PD) of 3.3 W at TA = 50 °C on an infinite heatsink. In practical PCB layouts using the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, derating applies per Figure 2 of the datasheet. This rating governs continuous leakage-related heating and sets thermal design boundaries-especially important in enclosed automotive or industrial enclosures where ambient temperatures exceed 50 °C.
Does SMAJ24AHE3/61 require special handling during PCB assembly?
No special handling is required for SMAJ24AHE3/61 during PCB assembly: it meets MSL Level 1 per J-STD-020, allowing exposure to ambient conditions indefinitely and supporting standard lead-free reflow profiles with a maximum peak temperature of 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and whisker resistance is certified to JESD 201 Class 2. No pre-baking or dry-packaging is needed-streamlining SMT line integration.
SMAJ24AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 10.3A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ24AHE3/61 FAQ
1.How can I place an order for SMAJ24AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ24AHE3/61 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 SMAJ24AHE3/61 reliable?
The price and inventory of SMAJ24AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ24AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ24AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ24AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ24AHE3/61?
SMAJ24AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ24AHE3/61 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 SMAJ24AHE3/61?
For technical support, including SMAJ24AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ24AHE3/61 requirements.
6.How does Aetrix verify that SMAJ24AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ24AHE3/61 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 SMAJ24AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ24AHE3/61?
All SMAJ24AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ24AHE3/61, 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 SMAJ24AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ24AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ24AHE3/61 Tags
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