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Vishay General Semiconductor - Diodes Division SMA5J26CAHE3_A/H
- Part No.:
- SMA5J26CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26CAHE3_A/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J26CAHE3_A/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 26 V standoff voltage (VWM), 42.1 V clamping voltage (VC) at 11.9 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 I/O circuits against ESD and load dump transients.
For engineers reviewing the SMA5J26CAHE3_A/H datasheet, SMA5J26CAHE3_A/H pinout, SMA5J26CAHE3_A/H application, or SMA5J26CAHE3_A/H equivalent, key selection criteria include bidirectional clamping behavior, 150 °C maximum junction temperature, RoHS-compliant matte tin terminals, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative polarity transients without polarity-sensitive layout. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping performance under repetitive surge stress.
The device is rated for 500 W peak pulse power per 10/1000 µs waveform, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead). It meets JESD201 Class 2 whisker resistance and is qualified to AEC-Q101 for automotive underhood and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 28.9 V / 31.9 V - Breakdown voltage range at 1 mA test current; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 42.1 V - Clamping voltage at 11.9 A peak pulse current; limits transient voltage seen by downstream ICs. |
| PPPM | 500 W - Peak pulse power handling (10/1000 µs); determines survivability against ISO 7637-2 Pulse 1/2a/5a surges. |
| 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; compatible with standard reflow profiles and J-STD-020 MSL Level 1. |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD; required for ECUs and ADAS sensors. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Terminal 1) | Surge current entry point (bidirectional) | Either terminal accepts transient energy; no cathode band marking distinguishes polarity. |
| Anode/Cathode (Terminal 2) | Surge current exit path (bidirectional) | Completes low-impedance path to ground or rail; identical electrical role to Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines without external polarity management. |
| 500 W peak pulse power | Withstands automotive load dump (ISO 7637-2 Pulse 5a) and inductive switching transients in 12 V systems. |
| AEC-Q101 qualification | Validates reliability for automotive body control modules, infotainment interfaces, and sensor signal conditioning. |
| MSL Level 1 rating | Allows floor-life unlimited storage and single-reflow processing without baking - simplifies SMT line integration. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 µA) across temperature and lifetime. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control units from battery transients and ESD. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller input pin to clamp ±2 kV ESD (IEC 61000-4-2) and ±100 V load dump spikes. Use Value: Limits voltage seen by MCU ADC input to ≤42.1 V, preventing latch-up or permanent damage while maintaining signal integrity. | Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field devices subject to inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals to shunt surge energy before it reaches optocoupler or level-shifter circuitry. Use Value: Clamps 500 W surges within 1 ns response time, preserving isolation barrier integrity and avoiding false triggering. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across A/B lines to suppress common-mode transients coupled onto twisted pair. Use Value: Maintains <42.1 V differential clamping while supporting >10 kV surge immunity per IEC 61000-4-5 (10/700 µs). | Use Scenario: Adding secondary surge protection on VBUS and D+/D− lines of USB-C ports in portable medical monitors. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF at VWM) placed after primary ESD array to handle higher-energy events. Use Value: Provides 500 W robustness without degrading USB 2.0 signal integrity or violating eye diagram mask requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J26CAHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM or regional regulation. | Choose SMA5J26CAHM3_A/H if halogen-free bill-of-materials is required; otherwise SMA5J26CAHE3_A/H is preferred for cost-sensitive automotive programs. |
| SMCJ26CAHE3_A/H | Same VWM/VC but in larger SMC (DO-214AB) package; 1500 W PPPM, lower RθJA (35 °C/W), higher IPPM (33.3 A). | Used where higher surge margin or improved thermal dissipation is needed - e.g., 24 V commercial vehicle systems with extended load dump duration. | Select SMCJ26CAHE3_A/H only when 500 W is insufficient; SMA5J26CAHE3_A/H remains optimal for space-constrained 12 V automotive PCBs. |
Compared with SMA5J26CAHM3_A/H, the SMA5J26CAHE3_A/H offers identical protection performance with standard RoHS compliance; versus SMCJ26CAHE3_A/H, it trades higher power handling for 40 % smaller footprint - critical for dense sensor module layouts.
Availability
SMA5J26CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interface, industrial I/O protection, and telecom line interface applications requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for SMA5J26CAHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The SMA5J series is engineered specifically for high-power-density transient suppression in space-constrained automotive and industrial environments, balancing 500 W surge capability with DO-214AC package miniaturization.
FAQ
What is the clamping voltage of the SMA5J26CAHE3_A/H at its rated peak pulse current?
The SMA5J26CAHE3_A/H has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 11.9 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J26CAHE3_A/H maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is the SMA5J26CAHE3_A/H suitable for automotive applications?
Yes, the SMA5J26CAHE3_A/H is AEC-Q101 qualified and explicitly intended for automotive use. Its construction includes glass-passivated junctions, matte tin-plated leads compliant with JESD201 Class 2 whisker testing, and MSL Level 1 moisture sensitivity rating - all validated for under-hood and body electronics. The SMA5J26CAHE3_A/H appears in Vishay's automotive ordering codes (HE3 suffix) and supports ISO 7637-2 transient immunity requirements in 12 V systems.
How does the bidirectional design of the SMA5J26CAHE3_A/H affect its circuit implementation?
The SMA5J26CAHE3_A/H has no polarity marking and functions identically in both directions, allowing direct placement across any two nodes requiring symmetrical overvoltage protection - such as differential signal pairs or AC-coupled lines. Unlike unidirectional TVS diodes, it eliminates the need for orientation verification during assembly and avoids failure modes caused by reverse installation. This simplifies layout and reduces risk in high-volume automotive PCB assembly.
What is the thermal resistance of the SMA5J26CAHE3_A/H, and how does it impact PCB layout?
The SMA5J26CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repeated surges, PCB layout must provide minimum recommended pad area and avoid excessive thermal isolation. The device's junction-to-lead resistance (RθJL) is 25 °C/W, indicating efficient heat transfer to solder joints - reinforcing the need for robust copper pour connections.
Does the SMA5J26CAHE3_A/H meet RoHS and halogen-free requirements?
The SMA5J26CAHE3_A/H is RoHS-compliant (per EU Directive 2011/65/EU) and carries the HE3 suffix denoting commercial-grade RoHS compliance with AEC-Q101 qualification. It is not halogen-free; for halogen-free compliance, the alternative SMA5J26CAHM3_A/H should be selected. Both variants share identical electrical specifications and qualification status, differing only in material composition per Vishay's material categorization standard (doc. 99912).
SMA5J26CAHE3_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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J26CAHE3_A/H FAQ
1.How can I place an order for SMA5J26CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26CAHE3_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 SMA5J26CAHE3_A/H reliable?
The price and inventory of SMA5J26CAHE3_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 SMA5J26CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J26CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26CAHE3_A/H?
SMA5J26CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26CAHE3_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 SMA5J26CAHE3_A/H?
For technical support, including SMA5J26CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26CAHE3_A/H requirements.
6.How does Aetrix verify that SMA5J26CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J26CAHE3_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 SMA5J26CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J26CAHE3_A/H?
All SMA5J26CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26CAHE3_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 SMA5J26CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMA5J26CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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