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Vishay General Semiconductor - Diodes Division SMA5J24AHM3_A/I
- Part No.:
- SMA5J24AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24AHM3_A/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,265
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Product details
Overview
SMA5J24AHM3_A/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 DC power rails and signal lines. It features a 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR), 38.9 V clamping voltage at 12.9 A peak pulse current, 500 W peak pulse power rating, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMA5J24AHM3_A/I datasheet, SMA5J24AHM3_A/I pinout, SMA5J24AHM3_A/I application, or SMA5J24AHM3_A/I equivalent, key selection considerations include its unidirectional polarity, 150 °C maximum junction temperature, halogen-free RoHS-compliant construction, and suitability for inductive load switching transients in automotive ECUs and industrial sensor interfaces.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below 24 V and rapidly avalanches above its 26.7 V minimum breakdown threshold to limit transient overvoltages. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and robust surge handling under 10/1000 μs waveforms.
The SMA5J24AHM3_A/I is rated for 40 A non-repetitive forward surge current (IFSM) and exhibits low incremental surge resistance, enabling effective suppression of fast-rising transients induced by relay switching, motor commutation, or ESD events in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail protection level. |
| VBR (min/max) | 26.7 V / 29.5 V - Breakdown occurs within this range at 1 mA test current; ensures predictable clamping onset. |
| VC @ IPPM | 38.9 V at 12.9 A - Clamped voltage during 500 W surge; determines maximum stress imposed on protected ICs. |
| PPPM | 500 W - Peak pulse power handling capability with 10/1000 μs waveform; supports high-energy automotive transients. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with automated placement. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability per stress test requirements including temperature cycling and HTRB. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional configuration with cathode band marking on one end. Molding compound meets UL 94 V-0; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path); conducts during positive transients when cathode is at higher potential. |
| Cathode | Reverse-biased terminal | Marked with band; connected to protected line (e.g., 24 V supply or signal); avalanches into conduction when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant | Meets environmental compliance for automotive and industrial PCBs without compromising thermal or electrical performance. |
| Low incremental surge resistance | Enables tighter clamping (VC = 38.9 V) under 12.9 A surge, reducing voltage overshoot on downstream components. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without preconditioning; eliminates moisture-related popcorning risk during assembly. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤38.9 V, preventing damage to 40 V-rated regulators and microcontrollers. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors. IC Role / Device Role / Timing Role: Bidirectional-capable layout used unidirectionally to shunt cable-induced surges to ground. Use Value: Withstands ≥500 W pulses while maintaining <1.0 μA leakage at 24 V, preserving signal accuracy. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Guarding PoE-powered equipment front-end against lightning-induced surges on 24–48 V DC inputs. IC Role / Device Role / Timing Role: Primary clamping device upstream of hot-swap controllers and PMICs. Use Value: Fast response time and 150 °C TJ rating ensure reliability in enclosed telecom enclosures. |
Use Scenario: Suppressing back-EMF from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to clamp inductive kickback. Use Value: 40 A IFSM rating handles repetitive commutation surges without degradation. |
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 | Same electrical specs, but RoHS-compliant without halogen-free certification; no AEC-Q101 qualification. | Approved for commercial/industrial use only; not validated for automotive temperature cycling or humidity testing. | Select when halogen-free requirement is absent and automotive qualification is unnecessary. |
| SMCJ24A | Same VWM/VC, but larger SMC (DO-214AB) package; 1500 W PPPM; higher thermal mass. | Better suited for higher-energy transients; requires larger PCB area and different pad layout. | Choose when system-level surge immunity exceeds 500 W and board space permits larger footprint. |
Compared with SMA5J24AHM3_A/I, SMA5J24AHE3_A/I lacks halogen-free and AEC-Q101 validation-critical for Tier-1 automotive sourcing-while SMCJ24A trades compactness for higher surge capacity, necessitating layout revision and cost reassessment.
Availability
SMA5J24AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMA5J24AHM3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained automotive and industrial systems, balancing clamping performance, thermal robustness, and manufacturability in surface-mount packages.
FAQ
What is the polarity configuration of SMA5J24AHM3_A/I?
The SMA5J24AHM3_A/I is a unidirectional TVS diode, with the cathode identified by a visible band on the SMA package body. It conducts only when the cathode is at a higher potential than the anode, making it suitable for DC rail protection where polarity is fixed. This differs from bidirectional variants (e.g., SMA5J24CA) which suppress transients regardless of polarity.
Does SMA5J24AHM3_A/I meet automotive qualification standards?
Yes, SMA5J24AHM3_A/I carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and full AEC-Q101 qualification. This includes testing for temperature cycling, high-temperature reverse bias, and accelerated life testing-validating its use in automotive powertrain and chassis modules per industry requirements.
What is the maximum clamping voltage for SMA5J24AHM3_A/I under surge conditions?
The SMA5J24AHM3_A/I clamps to a maximum of 38.9 V when subjected to its rated 12.9 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is guaranteed per the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during transient events.
Can SMA5J24AHM3_A/I be used in bidirectional applications?
No-SMA5J24AHM3_A/I is strictly unidirectional. For bidirectional surge protection, Vishay specifies part numbers ending in "CA" (e.g., SMA5J24CA). Using SMA5J24AHM3_A/I in reverse-biased configurations beyond its specified VWM may result in uncontrolled conduction or failure.
What is the thermal resistance of SMA5J24AHM3_A/I from junction to ambient?
The typical junction-to-ambient thermal resistance (RθJA) of SMA5J24AHM3_A/I is 80 °C/W when mounted on the recommended 0.2" × 0.2" copper pads per terminal. This value assumes standard JEDEC test conditions and is critical for estimating temperature rise during repeated surge events.
SMA5J24AHM3_A/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:
- 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):
- 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_A/I FAQ
1.How can I place an order for SMA5J24AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24AHM3_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 SMA5J24AHM3_A/I reliable?
The price and inventory of SMA5J24AHM3_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 SMA5J24AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J24AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24AHM3_A/I?
SMA5J24AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24AHM3_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 SMA5J24AHM3_A/I?
For technical support, including SMA5J24AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24AHM3_A/I requirements.
6.How does Aetrix verify that SMA5J24AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J24AHM3_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 SMA5J24AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J24AHM3_A/I?
All SMA5J24AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24AHM3_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 SMA5J24AHM3_A/I part is unused and in its original packaging.
Return procedure for SMA5J24AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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