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Vishay General Semiconductor - Diodes Division SMA5J24AHM3/H
- Part No.:
- SMA5J24AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24AHM3/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,289
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Product details
Overview
SMA5J24AHM3/H 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 24 V stand-off voltage (VWM), 38.9 V maximum clamping voltage (VC) at 12.9 A peak pulse current (IPPM), 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification - used to protect automotive sensor interfaces and industrial power rails against inductive switching transients.
For engineers reviewing the SMA5J24AHM3/H datasheet, SMA5J24AHM3/H pinout, SMA5J24AHM3/H application, or SMA5J24AHM3/H equivalent, this page delivers verified electrical parameters, thermal resistance (RθJA = 80 °C/W), polarity marking (cathode band), and AEC-Q101-compliant halogen-free construction - critical for automotive-grade ESD/surge design validation and BOM sourcing.
Technical Context
This TVS diode operates as a unidirectional clamping device with a breakdown voltage range of 26.7–29.5 V at 1 mA test current, enabling precise overvoltage threshold control in DC power domains. Its low incremental surge resistance and fast response time (<1 ns) ensure effective suppression of fast-rising transients such as ISO 7637-2 pulse 1 and pulse 2b.
Designed for surface-mount assembly on 5.0 mm × 5.0 mm copper pads per terminal, it delivers 500 W peak pulse power dissipation under standardized 10/1000 µs waveform conditions and supports junction temperatures from –55 °C to +150 °C - meeting requirements for under-hood automotive electronics and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - reverse stand-off voltage; defines maximum continuous operating voltage before significant leakage begins. |
| VBR min/max | 26.7 V / 29.5 V - breakdown voltage range at 1 mA; sets reliable conduction onset for transient clamping. |
| VC @ IPPM | 38.9 V at 12.9 A - maximum clamped voltage during 500 W surge; determines protected circuit's worst-case overvoltage exposure. |
| PPPM | 500 W - peak pulse power rating (10/1000 µs); defines single-event surge energy handling capability. |
| RθJA | 80 °C/W - junction-to-ambient thermal resistance; informs PCB copper pad sizing and derating above 25 °C ambient. |
| TJ max | +150 °C - maximum junction temperature; enables operation in high-temperature environments like engine control units. |
| AEC-Q101 | Qualified - certified for automotive reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; conducts during forward surge events (e.g., reverse battery connection). |
| Cathode | Clamping node (marked with band) | Connected to higher-potential side; initiates avalanche breakdown when reverse voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | Meets environmental compliance for automotive and industrial markets without compromising surge robustness. |
| MSL Level 1 moisture sensitivity | Enables unlimited floor life and reflow compatibility up to 260 °C peak without baking preconditioning. |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for downstream ICs like MCUs and CAN transceivers. |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting 24 V supply lines feeding ABS wheel speed sensors exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VBAT and GND to clamp transients before they reach sensor front-end ASICs. Use Value: Limits clamped voltage to ≤38.9 V, preserving sensor IC integrity during ISO 7637-2 pulse 5a (load dump) events up to 500 W. |
Use Scenario: Safeguarding PLC I/O module 24 V DC power inputs against relay coil de-energization spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input terminals to absorb repetitive 10/1000 µs surges without degradation. Use Value: Sustains 500 W peak pulse power with <1 ns response, preventing false triggering or latch-up in isolated power supplies. |
| Telecom Line Interface Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding RS-485 transceiver VCC pins in outdoor base station equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on 24 V bias rail, coordinated with secondary GDT or polymer PTC for staged protection. Use Value: Provides precise 24 V standoff and 38.9 V clamping to maintain transceiver common-mode range while surviving 100 A surge tests. |
Use Scenario: Securing microcontroller VDD supply in washing machine main board during brushless motor commutation noise. IC Role / Device Role / Timing Role: Localized TVS on 24 V logic rail upstream of LDO regulator to prevent brownout or reset faults. Use Value: Delivers AEC-Q101 reliability and halogen-free materials required for white goods safety certifications (IEC 60335). |
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/H | Same electrical specs, RoHS-compliant but not halogen-free; uses standard matte tin plating without halogen-free molding compound. | Approved for commercial/industrial use; not qualified for automotive applications requiring halogen-free compliance. | Select SMA5J24AHE3/H where AEC-Q101 is not required and halogen-free material is not mandated by OEM spec. |
| SMCJ24A-HF | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VWM/VC but 38.9 V clamping at 38.9 A - not pin-compatible. | Used where higher surge margin is needed (e.g., alternator output lines); requires PCB layout change due to larger footprint. | Choose SMCJ24A-HF only when system-level surge testing exceeds 500 W and board space allows SMC package relocation. |
Compared with SMA5J24AHE3/H and SMCJ24A-HF, the SMA5J24AHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, and SMA footprint - making it the only drop-in solution for automotive Tier-1 suppliers requiring both environmental compliance and automotive reliability without increasing board area.
Availability
SMA5J24AHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC power inputs, and telecom line interface protection requiring stable component supply, halogen-free materials, and AEC-Q101 traceability.
Supply support for SMA5J24AHM3/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and AEC-Q101 certification capabilities.
The SMA5J series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for robust clamping performance, automated assembly compatibility, and compliance with stringent environmental and qualification standards.
FAQ
What is the clamping voltage of the SMA5J24AHM3/H under a 500 W surge?
The SMA5J24AHM3/H clamps to a maximum of 38.9 V at its rated peak pulse current of 12.9 A, corresponding to the standardized 10/1000 µs waveform delivering 500 W. This value is measured at TA = 25 °C with devices mounted on 5.0 mm × 5.0 mm copper pads per terminal, as specified in Vishay document 88875.
Is the SMA5J24AHM3/H suitable for automotive applications?
Yes, the SMA5J24AHM3/H is AEC-Q101 qualified and constructed with halogen-free, RoHS-compliant materials - explicitly designated for automotive use via the "HM3" suffix. It meets requirements for under-hood and chassis-mounted ECUs, including temperature cycling, HTRB, and surge immunity testing per AEC standard.
How does the SMA5J24AHM3/H differ from the SMA5J24A-E3/61?
The SMA5J24AHM3/H uses halogen-free molding compound and matte tin plating compliant with JESD 201 Class 2 whisker resistance, whereas SMA5J24A-E3/61 is RoHS-compliant but not halogen-free and lacks AEC-Q101 qualification. Both share identical electrical specs and SMA package, but only SMA5J24AHM3/H satisfies automotive OEM halogen-free mandates.
What is the thermal resistance of the SMA5J24AHM3/H?
The SMA5J24AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air convection and is used to calculate allowable power derating above 25 °C ambient temperature.
Does the SMA5J24AHM3/H have polarity marking, and how is it identified?
Yes, the SMA5J24AHM3/H is unidirectional and marked with a cathode band on the package body - located at the cathode terminal end. This band must be oriented toward the higher-potential side of the protected circuit (e.g., connected to VBAT or VCC) to ensure proper clamping action during reverse transients.
SMA5J24AHM3/H 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/H FAQ
1.How can I place an order for SMA5J24AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24AHM3/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 SMA5J24AHM3/H reliable?
The price and inventory of SMA5J24AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J24AHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J24AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24AHM3/H?
SMA5J24AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24AHM3/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 SMA5J24AHM3/H?
For technical support, including SMA5J24AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24AHM3/H requirements.
6.How does Aetrix verify that SMA5J24AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J24AHM3/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 SMA5J24AHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J24AHM3/H?
All SMA5J24AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24AHM3/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 SMA5J24AHM3/H part is unused and in its original packaging.
Return procedure for SMA5J24AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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