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Vishay General Semiconductor - Diodes Division SMA6J24AHM3/5A
- Part No.:
- SMA6J24AHM3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J24AHM3/5A.pdf
- Description:
- TVS DIODE 24VWM 37.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,125
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Product details
Overview
SMA6J24AHM3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, with 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR at IT = 1 mA), and 37.8 V maximum clamping voltage (VC) at 15.9 A peak pulse current (IPP) under 10/1000 μs waveform. It delivers 600 W peak pulse power and is designed for protecting MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and telecom equipment.
For engineers reviewing the SMA6J24AHM3/5A datasheet, SMA6J24AHM3/5A pinout, SMA6J24AHM3/5A application, or SMA6J24AHM3/5A equivalent, key selection criteria include verified clamping performance at 15.9 A IPP, unidirectional polarity confirmation, SMA package thermal resistance (RθJA = 120 °C/W), and compliance with J-STD-020 MSL level 1.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM (24 V), avalanches at VBR (min 26.7 V), and limits transient voltage to ≤37.8 V at rated IPP. Its dynamic resistance (RD = 0.523 Ω) directly determines clamping rise under surge conditions.
Designed for PCB-level protection of low-voltage DC rails and signal paths, it features matte tin-plated leads solderable per J-STD-002, meets UL 94 V-0 flammability, and sustains 50 A non-repetitive forward surge (IFSM) - enabling robust handling of inductive kickback in motor drivers and power supply outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before leakage exceeds 0.2 μA; sets upper limit for protected circuit DC bias. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed avalanche onset range; ensures reliable turn-on above normal operating voltage. |
| VC @ IPP | 37.8 V at 15.9 A (10/1000 μs) - Measured clamping voltage defines worst-case overvoltage seen by downstream ICs during surge. |
| PPPM (10/1000 μs) | 600 W - Peak transient energy absorption capacity under standard lightning-surge waveform; validates protection margin. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm copper pads; determines derating above 50 °C ambient. |
| Polarity | Unidirectional - Cathode marked by band; blocks reverse conduction but conducts forward surges only when anode is positive relative to cathode. |
| IFSM | 50 A - Non-repetitive peak forward surge rating (8.3 ms half-sine); supports protection of power switches during load dump events. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, MSL level 1 (260 °C peak reflow). Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point during forward-biased surge | Connected to protected line (e.g., +12 V rail); conducts surge current toward ground when voltage exceeds VBR. |
| Cathode | Transient current exit point and reference node | Connected to system ground; establishes clamping reference; color band identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping voltage control | VC = 37.8 V at 15.9 A ensures downstream 24 V logic or analog circuits remain within absolute maximum ratings during surge. |
| Low-profile SMT packaging | SMA (DO-214AC) footprint enables automated placement and fits space-constrained PCB layouts without height penalty. |
| High surge current capability | 50 A IFSM rating allows safe handling of repetitive inductive turn-off spikes in relay or solenoid drive circuits. |
| Thermal reliability | 150 °C max junction temperature and J-STD-020 MSL level 1 qualification support reflow compatibility and long-term field operation. |
| Controlled leakage | ≤0.2 μA ID at 24 V VWM prevents measurable power loss or signal distortion in always-on sensor interfaces. |
Applications
| Industrial Motor Drive Protection | Telecom Power Supply Clamp |
|---|---|
Use Scenario: Suppresses inductive kickback from 24 V DC solenoids and small motors in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt TVS diode placed across motor coil terminals to clamp flyback voltage to ≤37.8 V. Use Value: Prevents gate oxide damage to driving MOSFETs by limiting transient overshoot below their 40 V VDS rating. | Use Scenario: Protects secondary-side 24 V DC output rails in telecom AC/DC adapters against lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected between +24 V and GND to absorb 600 W 10/1000 μs transients. Use Value: Maintains output regulation integrity by clamping surges before they propagate into downstream DC-DC converters or interface ICs. |
| Automotive Body Control Module | Industrial Sensor Signal Line Guard |
Use Scenario: Safeguards microcontroller GPIOs and LIN bus transceivers from load dump pulses in 24 V vehicle systems. IC Role / Device Role / Timing Role: TVS placed at module input connector to divert surge energy before entering ESD protection network. Use Value: Enables compliance with ISO 7637-2 Pulse 5a (load dump) by limiting clamped voltage to 37.8 V at 15.9 A. | Use Scenario: Shields analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation. IC Role / Device Role / Timing Role: Low-leakage (≤0.2 μA) unidirectional TVS installed inline on signal conductor to ground. Use Value: Preserves signal accuracy while providing 37.8 V clamping - critical for maintaining 12-bit ADC resolution in 24 V systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J24AHE3/5A | Same electrical specs, RoHS-compliant with lead finish per E3 (not halogen-free); RθJA identical; same MSL level. | No functional difference in protection performance; differs only in material compliance (E3 vs. M3). | Select SMA6J24AHM3/5A when halogen-free requirement applies per IPC-1752 or customer environmental policy. |
| SMCJ24A | Higher power rating (1500 W PPPM), larger SMC (DO-214AB) package, higher RθJA (60 °C/W), same VWM/VBR/VC specs. | Better thermal handling for sustained surges; requires larger PCB area and different pad layout. | Choose SMCJ24A where surge duty cycle or ambient temperature exceeds SMA6J24AHM3/5A derating limits. |
Compared with SMA6J24AHM3/5A, SMA6J24AHE3/5A offers identical protection performance with non-halogen-free construction, while SMCJ24A trades compact size for higher surge endurance and lower thermal resistance - making it suitable for thermally demanding or high-energy transient environments.
Availability
SMA6J24AHM3/5A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply and halogen-free compliance.
Supply support for SMA6J24AHM3/5A 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices for industrial, automotive, and computing markets.
The SMA6J series targets cost-sensitive, high-volume board-level transient protection with standardized SMT packaging and guaranteed clamping performance - optimized for automated assembly and reliability in harsh electrical environments.
FAQ
What is the maximum clamping voltage of the SMA6J24AHM3/5A under a 10/1000 μs surge?
The SMA6J24AHM3/5A has a maximum clamping voltage (VC) of 37.8 V when subjected to a 10/1000 μs waveform at 15.9 A peak pulse current (IPP). This value is measured per the test conditions specified in the Vishay datasheet (Document Number: 89460) and reflects worst-case overvoltage seen by protected circuitry during standardized surge events. The SMA6J24AHM3/5A maintains this clamping performance across its qualified operating temperature range.
Is the SMA6J24AHM3/5A unidirectional or bidirectional?
The SMA6J24AHM3/5A is a unidirectional transient voltage suppressor, as confirmed in the Vishay datasheet's FEATURES section and ELECTRICAL CHARACTERISTICS table. It conducts only during reverse-biased overvoltage events - i.e., when cathode voltage exceeds anode voltage - and blocks conduction in the forward direction except during specified surge conditions. Polarity is marked by a cathode band on the SMA package.
What does the "M3" suffix indicate in SMA6J24AHM3/5A?
The "M3" suffix in SMA6J24AHM3/5A denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance requirements, as defined in the Vishay ordering information table. It distinguishes this variant from the "E3" version (RoHS-compliant but not halogen-free) and confirms compliance with IPC-1752 material declaration standards for environmentally restricted substances.
Can the SMA6J24AHM3/5A be used in place of SMA6J24AHE3/5A?
Yes, the SMA6J24AHM3/5A can replace SMA6J24AHE3/5A in most applications because both share identical electrical specifications (VWM, VBR, VC, PPPM, IFSM) and mechanical form factor (SMA/DO-214AC). The sole difference is material compliance: M3 is halogen-free, while E3 is RoHS-compliant without halogen restriction. No PCB layout or schematic change is required for substitution unless halogen-free certification is mandated.
What is the thermal resistance junction-to-ambient (RθJA) for SMA6J24AHM3/5A?
The SMA6J24AHM3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on PCBs using the minimum recommended 5.0 mm × 5.0 mm copper pads per terminal, as stated in the THERMAL CHARACTERISTICS table of the Vishay datasheet. This value governs power derating above 50 °C ambient and must be applied in thermal design calculations for continuous or repetitive surge scenarios.
SMA6J24AHM3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.8V
- Current - Peak Pulse (10/1000µs):
- 15.9A
- Power - Peak Pulse:
- 600W
- 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)
SMA6J24AHM3/5A FAQ
1.How can I place an order for SMA6J24AHM3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J24AHM3/5A 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 SMA6J24AHM3/5A reliable?
The price and inventory of SMA6J24AHM3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J24AHM3/5A is usually 5 days.
3.What payment methods are accepted for SMA6J24AHM3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J24AHM3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J24AHM3/5A?
SMA6J24AHM3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J24AHM3/5A 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 SMA6J24AHM3/5A?
For technical support, including SMA6J24AHM3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J24AHM3/5A requirements.
6.How does Aetrix verify that SMA6J24AHM3/5A is sourced from the original manufacturer or authorized distributors?
All SMA6J24AHM3/5A 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 SMA6J24AHM3/5A meets industry standards.
7.What is the process for return or replacement of SMA6J24AHM3/5A?
All SMA6J24AHM3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J24AHM3/5A, 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 SMA6J24AHM3/5A part is unused and in its original packaging.
Return procedure for SMA6J24AHM3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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