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Vishay General Semiconductor - Diodes Division SMA5J15CAHM3_A/H
- Part No.:
- SMA5J15CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J15CAHM3_A/H.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,121
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Product details
Overview
SMA5J15CAHM3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage at 20.5 A peak pulse current (IPPM), 500 W peak pulse power (10/1000 µs), and operates from −55 °C to +150 °C - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SMA5J15CAHM3_A/H datasheet, SMA5J15CAHM3_A/H pinout, SMA5J15CAHM3_A/H application, or SMA5J15CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device functions as a voltage-clamping protector using an avalanche breakdown mechanism, with symmetrical reverse/forward characteristics due to its bidirectional construction. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The SMA5J15CAHM3_A/H is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive use. It meets MSL level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature, and uses glass-passivated chip junctions for stable long-term reliability under repetitive surge stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 16.7 V / 18.5 V - breakdown occurs within this range at 1 mA test current |
| VC @ IPPM | 24.4 V - clamps transients to ≤24.4 V when subjected to 20.5 A 10/1000 µs surge |
| PPPM | 500 W - peak transient power handling capability under standard waveform |
| TJ max | +150 °C - maximum junction temperature rating supports under-hood automotive use |
| RθJA | 80 °C/W - thermal resistance from junction to ambient on standard 5.0 mm × 5.0 mm pad layout |
| ID @ VWM | 1.0 µA - leakage current at stand-off voltage ensures minimal standby power loss |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads. No polarity marking - bidirectional operation confirmed per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no cathode band marking required for bidirectional types |
| Case (body) | Thermal and mechanical interface | Plastic molding provides UL 94 V-0 flammability rating and mechanical robustness |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements for industrial and consumer electronics |
| MSL Level 1 | Allows unlimited floor life and compatibility with standard lead-free reflow profiles up to 260 °C |
| Glass-passivated junction | Improves long-term stability and reduces parameter drift under repeated surge stress |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Voltage clamping element placed directly at connector entry point or IC input pins. Use Value: Limits induced surges to ≤24.4 V, preventing damage to downstream 3.3 V/5 V logic and analog front-ends while maintaining signal integrity. | Use Scenario: Shielding PLC digital input modules and fieldbus terminations from EFT and surge events in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage protection device across 24 V DC supply rails and discrete input channels. Use Value: Withstands 500 W transient energy and 20.5 A peak current, enabling robust operation in electrically noisy industrial environments. |
| Telecom Line Protection | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against lightning-induced surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across data pairs and common-mode to chassis ground. Use Value: Symmetrical clamping ensures equal protection for both polarities of fast-rising transients, critical for full-duplex communication links. | Use Scenario: Secondary-level surge suppression on AC-DC adapter primary-side rectifier outputs and secondary-side 12 V/19 V rails. IC Role / Device Role / Timing Role: Clamping device located after bulk capacitor, before DC-DC converter input. Use Value: 15 V VWM aligns with typical adapter output tolerances, while 24.4 V VC prevents overvoltage stress on downstream regulators during line surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J15CAHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks HM3 suffix designation | Approved for commercial-grade automotive use but not halogen-free requirement | Select when halogen-free material is not mandated by end-product compliance standards |
| SMA6J15CAHM3_A/H | 600 W PPPM rating (vs. 500 W); identical VWM, VBR, VC, and package | Higher surge margin for systems exposed to more severe transients (e.g., heavy-duty vehicle alternators) | Choose when design requires ≥600 W transient power headroom without changing PCB layout |
Compared with SMA5J15CAHM3_A/H, SMA5J15CAHE3_A/H offers identical clamping performance but omits halogen-free certification, while SMA6J15CAHM3_A/H delivers 20 % higher peak pulse power in the same footprint - enabling upgrade paths without redesign.
Availability
SMA5J15CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line surge suppression requiring stable component supply and AEC-Q101 traceability.
Supply support for SMA5J15CAHM3_A/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 is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability and automotive-grade solutions.
The SMA5JxxCA family is engineered for high-power-density transient suppression in space-constrained applications, targeting automotive, industrial, and telecom systems where bidirectional clamping and AEC-Q101 qualification are mandatory.
FAQ
What is the clamping voltage of the SMA5J15CAHM3_A/H under a 10/1000 µs surge?
The SMA5J15CAHM3_A/H clamps to a maximum of 24.4 V when subjected to its rated peak pulse current of 20.5 A under the standardized 10/1000 µs waveform. This value is measured at the device terminals with specified mounting conditions (0.2" × 0.2" copper pads), and represents the upper limit of voltage seen by protected circuitry during transient events.
Is the SMA5J15CAHM3_A/H suitable for automotive applications?
Yes, the SMA5J15CAHM3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix. It supports operating temperatures from −55 °C to +150 °C, meets MSL Level 1 for lead-free assembly, and is halogen-free and RoHS-compliant - fulfilling key requirements for engine control units, body electronics, and ADAS sensor modules.
Does the SMA5J15CAHM3_A/H have polarity markings?
No, the SMA5J15CAHM3_A/H does not feature a cathode band or other polarity marking because it is a bidirectional TVS diode. Both terminals are functionally identical, allowing installation without orientation concern - a key advantage for protecting AC-coupled or floating signal paths such as CAN bus or Ethernet differential pairs.
What is the thermal resistance of the SMA5J15CAHM3_A/H?
The SMA5J15CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air conditions and is critical for estimating junction temperature rise during sustained surge events or elevated ambient environments.
How does the SMA5J15CAHM3_A/H differ from the unidirectional SMA5J15A variant?
The SMA5J15CAHM3_A/H is bidirectional with symmetrical clamping in both directions and no polarity marking, whereas the SMA5J15A is unidirectional, features a cathode band, and conducts only in reverse bias. Their VWM (15 V), VBR (16.7–18.5 V), and VC (24.4 V) match, but SMA5J15A supports forward surge current (IFSM = 40 A) - a capability absent in the CA version.
SMA5J15CAHM3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 20.5A
- 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)
SMA5J15CAHM3_A/H FAQ
1.How can I place an order for SMA5J15CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J15CAHM3_A/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 SMA5J15CAHM3_A/H reliable?
The price and inventory of SMA5J15CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J15CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J15CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J15CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J15CAHM3_A/H?
SMA5J15CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J15CAHM3_A/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 SMA5J15CAHM3_A/H?
For technical support, including SMA5J15CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J15CAHM3_A/H requirements.
6.How does Aetrix verify that SMA5J15CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J15CAHM3_A/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 SMA5J15CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J15CAHM3_A/H?
All SMA5J15CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J15CAHM3_A/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 SMA5J15CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMA5J15CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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