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Vishay General Semiconductor - Diodes Division SMA5J15CAHM3/H
- Part No.:
- SMA5J15CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J15CAHM3/H.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,425
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Product details
Overview
SMA5J15CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 20.5 A peak pulse current (IPPM), 500 W peak pulse power (10/1000 µs), and operates across -55 °C to +150 °C junction temperature. It is used to protect automotive sensor interfaces and industrial I/O lines against ESD and load dump transients.
For engineers reviewing the SMA5J15CAHM3/H datasheet, SMA5J15CAHM3/H pinout, SMA5J15CAHM3/H application, or SMA5J15CAHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under standardized surge waveforms, and direct alternatives with documented differences in breakdown voltage and unidirectional capability.
Technical Context
This bidirectional TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ps) to transient overvoltages and low incremental surge resistance. Its symmetrical breakdown behavior ensures identical clamping in both polarities, making it suitable for AC-coupled or floating signal paths where polarity reversal is possible.
The device is rated for 500 W peak pulse power per 10/1000 µs waveform, derated above 25 °C with RθJA = 80 °C/W, and meets J-STD-020 MSL Level 1 (260 °C reflow). The HM3 suffix confirms halogen-free, RoHS-compliant construction with AEC-Q101 qualification for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR min/max | 16.7 V / 18.5 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on during transients. |
| VC @ IPPM | 24.4 V - Clamped voltage at 20.5 A peak pulse current; limits downstream IC stress during ISO 7637-2 Pulse 1/2a/5a events. |
| PPPM | 500 W - Peak pulse power handling (10/1000 µs); supports robust protection in automotive and industrial environments. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood or enclosed industrial enclosures. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance; informs PCB pad layout requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), cathode band omitted per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; voltage clamping activates when differential voltage exceeds ±VBR. |
| Case (body) | Thermal and mechanical interface | Plastic-molded body provides UL 94 V-0 flammability rating and mechanical stability during reflow soldering. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails. |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental compliance standards without compromising surge robustness or thermal performance. |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR = 7.7 V) and lower let-through energy compared to standard Zener-based TVS devices. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking, simplifying SMT manufacturing flow. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from ESD and load dump in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits transient voltage to ≤24.4 V during ISO 10605 ESD (±30 kV air) and ISO 7637-2 Pulse 5a (75 V/300 ms), preserving signal integrity and IC reliability. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input channels to shunt surge energy before reaching optocoupler or microcontroller GPIO. Use Value: Withstands repetitive 500 W surges while maintaining <1 μA leakage at 15 V, minimizing false triggering and power loss in always-on monitoring circuits. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side surge suppression on Ethernet PHY power rails and auxiliary bias supplies in PoE-powered equipment. IC Role / Device Role / Timing Role: Standoff-clamp element between VDD and GND on isolated DC/DC converter outputs feeding sensitive PHY ICs. Use Value: Fast response time and symmetrical clamping prevent latch-up in 3.3 V/5 V logic domains during induced lightning surges on nearby cables. |
Use Scenario: Input-stage transient protection on universal-input (90–264 VAC) AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Secondary-side TVS across bulk capacitor output to absorb residual transients escaping primary-side MOV/clamp networks. Use Value: 15 V VWM aligns with 12 V output regulation; 24.4 V VC ensures downstream LDOs and PMICs remain within absolute maximum ratings during EN 61000-4-5 testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J15AHE3/A | Unidirectional; same VWM, VBR, and PPPM, but only conducts in one polarity; HE3 suffix denotes AEC-Q101 + RoHS, no halogen restriction. | Requires correct polarity placement; unsuitable for AC or floating signals; preferred where cost or legacy design mandates unidirectional behavior. | Select SMA5J15AHE3/A only if circuit topology guarantees fixed polarity and halogen-free material is not required. |
| SMA6J15CA-M3/5A | 600 W rating (vs. 500 W); same VWM/VC; M3 suffix indicates halogen-free/RoHS; different package (SMA vs. DO-214AC identical footprint but distinct thermal profile). | Higher power headroom for extended surge duration; identical mounting but slightly higher RθJA (85 °C/W); validated for same automotive applications. | Choose SMA6J15CA-M3/5A when system-level testing reveals marginal margin with 500 W rating or when dual-sourcing across Vishay's 600 W family is desired. |
Compared with SMA5J15CAHM3/H, SMA5J15AHE3/A lacks bidirectionality and halogen-free compliance, limiting its use in modern automotive designs; SMA6J15CA-M3/5A offers higher pulse power but requires verification of thermal performance under repeated surge conditions due to elevated RθJA.
Availability
SMA5J15CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, AEC-Q101 qualification, and halogen-free compliance.
Supply support for SMA5J15CAHM3/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 reliability and automotive-grade validation.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 compliance, and repeatable clamping performance are critical.
FAQ
What does the 'HM3' suffix mean in SMA5J15CAHM3/H?
The 'HM3' suffix in SMA5J15CAHM3/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The 'H' denotes AEC-Q101 compliance, 'M3' specifies halogen-free and RoHS materials, and '/H' is the revision code. This makes SMA5J15CAHM3/H suitable for automotive applications requiring strict environmental and reliability standards, unlike commercial-grade variants such as SMA5J15CA-E3/61.
Is SMA5J15CAHM3/H bidirectional, and how does that affect circuit placement?
Yes, SMA5J15CAHM3/H is a bidirectional TVS diode, meaning it clamps voltage transients equally in both polarities without polarity marking. This allows placement across floating or AC-coupled signal lines-such as CAN differential pairs or transformer-isolated interfaces-without orientation concerns. Unlike unidirectional variants like SMA5J15AHE3/A, SMA5J15CAHM3/H eliminates risk of incorrect installation and supports symmetric surge protection in full-bridge or H-bridge motor driver feedback paths.
What is the maximum clamping voltage of SMA5J15CAHM3/H, and under what test condition is it specified?
The maximum clamping voltage (VC) of SMA5J15CAHM3/H is 24.4 V, measured at a peak pulse current (IPPM) of 20.5 A using the standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed across the operating temperature range and reflects worst-case let-through voltage during transient events such as ISO 7637-2 Pulse 1 or IEC 61000-4-5 Combination Wave surges, ensuring downstream ICs remain within safe operating limits.
Does SMA5J15CAHM3/H require special PCB layout considerations for thermal management?
Yes, SMA5J15CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W, so effective copper pour area on both terminals is essential for sustained surge handling. Vishay recommends minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Reducing pad size or omitting thermal vias increases junction temperature during repetitive surges, potentially degrading clamping consistency and long-term reliability of SMA5J15CAHM3/H in high-duty-cycle applications.
How does SMA5J15CAHM3/H compare to SMA5J15AHE3/A in terms of automotive qualification?
Both SMA5J15CAHM3/H and SMA5J15AHE3/A are AEC-Q101 qualified, but SMA5J15CAHM3/H adds halogen-free compliance (M3) and uses the '/H' revision code, whereas SMA5J15AHE3/A uses HE3 (RoHS + AEC-Q101, non-halogen-free). SMA5J15CAHM3/H is therefore preferred for Tier 1 automotive programs mandating halogen-free materials, while SMA5J15AHE3/A remains acceptable for cost-sensitive or legacy platforms where halogen content is unrestricted.
SMA5J15CAHM3/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:
- -
- 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/H FAQ
1.How can I place an order for SMA5J15CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J15CAHM3/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/H reliable?
The price and inventory of SMA5J15CAHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMA5J15CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J15CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J15CAHM3/H?
SMA5J15CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J15CAHM3/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/H?
For technical support, including SMA5J15CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J15CAHM3/H requirements.
6.How does Aetrix verify that SMA5J15CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J15CAHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMA5J15CAHM3/H?
All SMA5J15CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J15CAHM3/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/H part is unused and in its original packaging.
Return procedure for SMA5J15CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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