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Vishay General Semiconductor - Diodes Division SMA5J24AHM3/I
- Part No.:
- SMA5J24AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24AHM3/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,852
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Product details
Overview
SMA5J24AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown range (VBR), 38.9 V clamping voltage at 12.9 A peak pulse current (IPPM), and 500 W peak pulse power (10/1000 µs waveform). It is widely used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMA5J24AHM3/I datasheet, SMA5J24AHM3/I pinout, SMA5J24AHM3/I application, or SMA5J24AHM3/I equivalent, key selection criteria include clamping performance under 10/1000 µs transients, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, activating when reverse voltage exceeds VBR to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, critical for consistent clamping during repetitive transients.
Designed for surface-mount automated assembly, it meets MSL Level 1 (260 °C peak reflow) and supports operation from –55 °C to +150 °C junction temperature. The SMA (DO-214AC) package delivers high power density with 5.0 mm × 5.0 mm copper pad thermal management per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Verified breakdown range ensuring reliable turn-on across process and temperature variation. |
| VC @ IPPM | 38.9 V at 12.9 A - Clamping voltage under standardized 10/1000 µs surge; determines maximum stress imposed on protected device. |
| PPPM | 500 W - Peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports inrush current immunity in DC power rails. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance on recommended 5.0 mm × 5.0 mm copper pads; guides PCB thermal design. |
| Package | SMA (DO-214AC) - Low-profile SMD outline with cathode band marking; compatible with standard pick-and-place and reflow processes. |
Pinout & Package
SMA (DO-214AC) package: surface-mount, two-terminal, unidirectional configuration with cathode band marking on the case. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), lead pitch 2.54 mm, matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return node; must be routed with low-inductance trace for effective clamping. |
| Cathode | Protected line connection / surge injection point | Connected to the line being protected (e.g., 24 V rail input); marked by visible band on case body. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | HM3 suffix confirms halogen-free molding compound and terminations, meeting automotive and industrial environmental requirements. |
| AEC-Q101 qualified | HM3/I variant is AEC-Q101 qualified, enabling use in automotive power modules, body control units, and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive 24 V logic and gate drivers. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C peak reflow without baking, simplifying manufacturing logistics. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage current over temperature and lifetime, critical for field reliability. |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 24 V rail and chassis ground to clamp transients up to 500 W. Use Value: Limits voltage to ≤38.9 V during ISO 7637-2 Pulse 5a (load dump), preventing damage to MCU power regulators and CAN transceivers. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Standoff-rated TVS on each 24 V digital input line, conducting only during >26.7 V transients. Use Value: Maintains signal integrity by suppressing >1 kV/µs spikes while adding <10 pF capacitance, avoiding false triggering of optocouplers. |
| DC Motor Drive Gate Protection | Telecom Power Interface |
Use Scenario: Shielding N-channel MOSFET gate drivers in H-bridge motor controllers from shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: TVS placed between gate and source to clamp Miller-induced overshoot during fast switching transitions. Use Value: Fast response time (<1 ns) and low clamping voltage prevent gate oxide breakdown while supporting PWM frequencies up to 100 kHz. |
Use Scenario: Front-end surge suppression on 24 V PoE-powered telecom equipment receiving power over long cable runs. IC Role / Device Role / Timing Role: Primary clamping device on DC input before DC/DC converter, rated for repeated 10/1000 µs surges. Use Value: Withstands ≥1000 surges at 50 % IPPM per JEDEC JESD22-A114, ensuring multi-year field reliability in outdoor cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J24AHE3_A/I | RoHS-compliant but not halogen-free; lacks HM3's halogen-free certification; same electrical specs and AEC-Q101 qualification. | Acceptable where halogen-free requirement is not mandated (e.g., non-automotive industrial designs). | Select when cost optimization is prioritized and halogen-free compliance is not required by end-customer specification. |
| SMA6J24A-M3/5A | 600 W PPPM, higher IPPM (14.3 A), identical VWM/VBR/VC; larger SMA package variant with enhanced surge margin. | Better suited for systems requiring headroom beyond IEC 61000-4-5 Level 4 or frequent surge exposure. | Choose when long-term reliability under repeated high-energy transients is critical and board space allows larger footprint. |
Compared with SMA5J24AHM3/I, SMA5J24AHE3_A/I offers identical protection performance without halogen-free assurance, while SMA6J24A-M3/5A provides 20 % higher surge power rating at the cost of increased package size and thermal mass-making SMA5J24AHM3/I optimal for space-constrained AEC-Q101 automotive applications needing halogen-free compliance.
Availability
SMA5J24AHM3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and DC motor drive gate protection requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for SMA5J24AHM3/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, power density, and automotive-grade qualification.
The SMA5J series was developed specifically for high-power-density transient suppression in harsh-environment applications, targeting 12 V/24 V automotive and industrial systems where compact size, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of the SMA5J24AHM3/I under a 10/1000 µs surge?
The SMA5J24AHM3/I clamps to 38.9 V at its rated peak pulse current of 12.9 A under a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the maximum voltage seen by downstream components during surge events. The SMA5J24AHM3/I maintains this clamping performance across its qualified operating temperature range.
Is the SMA5J24AHM3/I AEC-Q101 qualified?
Yes, the SMA5J24AHM3/I is AEC-Q101 qualified, as confirmed by the HM3 suffix and "_I" revision code in the ordering part number. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, validating its suitability for automotive powertrain and body electronics applications. The SMA5J24AHM3/I data sheet explicitly lists AEC-Q101 compliance in the mechanical data section.
What does the "HM3" suffix indicate for the SMA5J24AHM3/I?
The "HM3" suffix on SMA5J24AHM3/I denotes halogen-free, RoHS-compliant construction with matte tin-plated leads, meeting JESD201 Class 2 whisker resistance. It distinguishes this variant from E3 (RoHS only) and HE3 (AEC-Q101 + RoHS) versions. The HM3 designation ensures compliance with automotive and industrial environmental directives requiring absence of brominated flame retardants and chlorine-based compounds.
How is polarity identified on the SMA5J24AHM3/I package?
The SMA5J24AHM3/I is unidirectional and uses a visible cathode band on the SMA (DO-214AC) case to identify the cathode terminal. The anode is the unmarked end. This marking aligns with JEDEC DO-214AC standards and ensures correct orientation during PCB layout and automated placement. Incorrect polarity would prevent proper clamping during reverse-transient events.
What is the thermal resistance of the SMA5J24AHM3/I, and how does it affect PCB layout?
The SMA5J24AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To achieve this rating, PCB layout must provide minimum copper area per pad and avoid thermal isolation. Reducing pad size increases RθJA, raising junction temperature during surge events and potentially degrading long-term reliability of the SMA5J24AHM3/I.
SMA5J24AHM3/I 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):
- 12.9A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J24AHM3/I FAQ
1.How can I place an order for SMA5J24AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24AHM3/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 SMA5J24AHM3/I reliable?
The price and inventory of SMA5J24AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J24AHM3/I is usually 5 days.
3.What payment methods are accepted for SMA5J24AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24AHM3/I?
SMA5J24AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24AHM3/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 SMA5J24AHM3/I?
For technical support, including SMA5J24AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24AHM3/I requirements.
6.How does Aetrix verify that SMA5J24AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J24AHM3/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 SMA5J24AHM3/I meets industry standards.
7.What is the process for return or replacement of SMA5J24AHM3/I?
All SMA5J24AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24AHM3/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 SMA5J24AHM3/I part is unused and in its original packaging.
Return procedure for SMA5J24AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J24AHM3/I Tags
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