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Vishay General Semiconductor - Diodes Division SMA5J26CAHM3/I
- Part No.:
- SMA5J26CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26CAHM3/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,356
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Product details
Overview
SMA5J26CAHM3/I 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 26 V standoff voltage (VWM), 42.1 V maximum clamping voltage (VC) at 11.9 A peak pulse current (IPPM), and 500 W peak pulse power (10/1000 μs waveform), making it suitable for automotive sensor line and industrial I/O port protection.
For engineers reviewing the SMA5J26CAHM3/I datasheet, SMA5J26CAHM3/I pinout, SMA5J26CAHM3/I application, or SMA5J26CAHM3/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), thermal resistance (RθJA = 80 °C/W), and junction temperature range (–55 °C to +150 °C).
Technical Context
This device operates as a voltage-clamped crowbar during transients, with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and fast response time (<1.0 ps), critical for protecting sensitive analog inputs and CAN/LIN bus interfaces.
The SMA5J26CAHM3/I is rated for 500 W peak pulse power under standardized 10/1000 μs waveform conditions, with clamping validated at IPPM = 11.9 A. Its thermal design relies on low RθJL (25 °C/W) and recommended 5.0 mm × 5.0 mm copper pads to sustain repetitive surge events without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on across production lot. |
| VC @ IPPM | 42.1 V - Clamped voltage seen by protected circuit at 11.9 A surge; limits stress on downstream ICs like microcontrollers or transceivers. |
| PPPM | 500 W - Peak pulse power handling per 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity testing. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint; compatible with standard SMT reflow profiles (MSL level 1, 260 °C peak). |
Pinout & Package
SMA5J26CAHM3/I uses the SMA (DO-214AC) package: a two-terminal, non-polarized surface-mount device with no cathode marking (bidirectional type). Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as input/output; bidirectional clamping allows placement without polarity concern on AC or differential lines. |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; copper pad layout directly impacts thermal dissipation and surge endurance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets JEDEC JESD201 Class 2 whisker resistance and environmental compliance for global OEM supply chains. |
| Low incremental surge resistance | Enables tighter clamping (VC – VBR = 13.2 V) and reduced let-through energy during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a). |
| Fast response time | Sub-nanosecond turn-on ensures protection of high-speed interfaces such as LIN, CAN FD, and RS-485 before damage occurs. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and ECU input to limit transient overvoltage. Use Value: Maintains signal integrity below 42.1 V during 11.9 A surges, preventing ADC saturation or op-amp latch-up in 24 V systems. |
Use Scenario: Safeguarding programmable logic controller (PLC) digital input channels connected to field switches and solenoids. IC Role / Device Role / Timing Role: Standoff-and-clamp protector on 24 V DC input lines subject to inductive kickback from relay coils. Use Value: Withstands 500 W surges without degradation, enabling >100,000 switching cycles while maintaining <1.0 μA leakage at 26 V. |
| Telecom Line Interface | Consumer Appliance Control Board |
|
Use Scenario: Shielding RS-485 transceiver pins in building automation gateways against ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF at 0 V) placed directly at connector entry point. Use Value: Clamps common-mode transients to <42.1 V while preserving signal rise/fall times due to minimal parasitic capacitance. |
Use Scenario: Securing microcontroller GPIOs driving relays or triacs in smart home appliances subjected to mains-borne noise. IC Role / Device Role / Timing Role: Secondary-level surge suppression after primary MOV filtering on 12 V control rails. Use Value: Provides precise 26 V standoff to avoid false triggering during normal 12 V/24 V rail fluctuations while clamping fast spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J26CAHE3/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial/industrial use only; not approved for automotive under-hood deployment. | Select when halogen-free requirement or automotive qualification is not mandated. |
| SMA6J26CAHM3/I | Higher PPPM (600 W); identical VWM, VBR, and VC; same SMA package and HM3 suffix. | Provides 20 % higher surge margin for designs targeting IEC 61000-4-5 Level 5 or extended lifetime under repetitive stress. | Choose when system-level surge testing exceeds 500 W or long-term reliability under frequent transients is critical. |
Compared with SMA5J26CAHM3/I, SMA5J26CAHE3/I offers cost savings without halogen-free or automotive validation, while SMA6J26CAHM3/I delivers headroom for higher-energy threats-both retain identical PCB layout and signal integrity behavior.
Availability
SMA5J26CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply with full traceability and lifecycle management.
Supply support for SMA5J26CAHM3/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 high-reliability diodes, rectifiers, and protection devices for demanding environments.
The SMA5JxxCA family was engineered for high-power-density transient suppression in space-constrained automotive and industrial applications, emphasizing AEC-Q101 compliance, thermal robustness, and repeatable clamping performance.
FAQ
What does the "HM3" suffix indicate in SMA5J26CAHM3/I?
The "HM3" suffix in SMA5J26CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JEDEC JESD201 Class 2 whisker resistance, UL 94 V-0 flammability, and automotive-grade reliability testing-critical for under-hood and safety-critical systems.
Is SMA5J26CAHM3/I unidirectional or bidirectional?
SMA5J26CAHM3/I is a bidirectional TVS diode, as indicated by the "CA" suffix. Its symmetrical breakdown and clamping behavior in both polarities eliminate polarity concerns during placement, making it ideal for AC-coupled lines, differential buses (e.g., RS-485), and floating sensor outputs.
What is the maximum clamping voltage for SMA5J26CAHM3/I, and at what current is it specified?
The maximum clamping voltage for SMA5J26CAHM3/I is 42.1 V, measured at a peak pulse current (IPPM) of 11.9 A using the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events.
Can SMA5J26CAHM3/I be used in place of SMA5J26A (unidirectional) without circuit modification?
No-SMA5J26CAHM3/I is bidirectional and lacks polarity marking, whereas SMA5J26A is unidirectional with a cathode band. Substituting them requires verifying that reverse conduction is acceptable in the target circuit; direct replacement may cause malfunction in DC-biased paths.
What thermal derating applies to SMA5J26CAHM3/I above 25 °C ambient?
SMA5J26CAHM3/I must be derated linearly above 25 °C ambient per Figure 2 in the datasheet: peak pulse power decreases by approximately 0.625 %/°C. At 85 °C ambient, usable PPPM drops to ~312 W when mounted on 5.0 mm × 5.0 mm copper pads.
SMA5J26CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 11.9A
- 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)
SMA5J26CAHM3/I FAQ
1.How can I place an order for SMA5J26CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26CAHM3/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 SMA5J26CAHM3/I reliable?
The price and inventory of SMA5J26CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J26CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMA5J26CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26CAHM3/I?
SMA5J26CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26CAHM3/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 SMA5J26CAHM3/I?
For technical support, including SMA5J26CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26CAHM3/I requirements.
6.How does Aetrix verify that SMA5J26CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J26CAHM3/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 SMA5J26CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMA5J26CAHM3/I?
All SMA5J26CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26CAHM3/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 SMA5J26CAHM3/I part is unused and in its original packaging.
Return procedure for SMA5J26CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J26CAHM3/I Tags
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