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Vishay General Semiconductor - Diodes Division SMA5J26CAHM3_A/I
- Part No.:
- SMA5J26CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26CAHM3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,485
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Product details
Overview
SMA5J26CAHM3_A/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 clamping voltage at 11.9 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 µs waveform. Used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMA5J26CAHM3_A/I datasheet, SMA5J26CAHM3_A/I pinout, SMA5J26CAHM3_A/I application, or SMA5J26CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping under repetitive transients.
The device is rated for junction temperatures from −55 °C to +150 °C and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak. Its thermal resistance (RθJA = 80 °C/W) reflects performance on standard PCB pad layouts, and it delivers full 500 W surge handling only when mounted per recommended 5.0 mm × 5.0 mm copper pads.
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 within specified tolerance. |
| VC @ IPPM | 42.1 V - Clamping voltage at 11.9 A peak pulse current; determines maximum voltage stress imposed on downstream components. |
| PPPM | 500 W - Peak pulse power dissipation with 10/1000 µs waveform; quantifies single-event surge energy absorption capacity. |
| ID @ VWM | <1.0 µA - Reverse leakage current at standoff voltage; critical for low-power sensor and battery-backed circuits. |
| TJ max | +150 °C - Maximum junction temperature; sets thermal design margin for sustained operation in enclosed or high-ambient environments. |
| Package | SMA (DO-214AC) - Surface-mount package with 2.54 mm lead pitch; compatible with standard pick-and-place and reflow processes. |
Pinout & Package
SMA5J26CAHM3_A/I uses the SMA (DO-214AC) surface-mount package: a molded plastic case with two coplanar leads, no polarity marking (bidirectional), and matte tin-plated terminals solderable per J-STD-002. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), with 2.54 mm lead spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional terminal pair | No cathode band; symmetrical conduction enables AC line or differential bus protection without orientation constraints. |
| Case | Non-electrical mechanical body | UL 94 V-0 rated molding compound provides flame resistance and mechanical robustness in harsh environments. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and surge endurance-enables use in engine control, ADAS, and infotainment modules. |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-20 requirements; eliminates brominated flame retardants and supports green manufacturing mandates. |
| Low incremental surge resistance | Enables tighter clamping voltage window (VC − VBR ≈ 13.2 V) compared to legacy TVS devices, reducing overvoltage stress on sensitive IC inputs. |
| MSL Level 1 rating | Allows unlimited floor life and exposure to 260 °C peak reflow without baking-reduces production delays and moisture-related defects. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and power supply rails against load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp absorbing ±100 V/500 W transients while maintaining signal integrity during normal operation. Use Value: Prevents latch-up or permanent damage to microcontrollers and analog front-ends exposed to ISO 7637-2 Pulse 5a/b surges. |
Use Scenario: Shielding 4–20 mA current loop transmitters and RTD interface circuits from ESD and switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) transient suppressor placed directly at connector entry points to shunt induced spikes before reaching precision amplifiers. Use Value: Maintains measurement accuracy by limiting voltage excursion to ≤42.1 V during 1 kV EFT bursts per IEC 61000-4-4. |
| Telecom Data Line Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: High-power bidirectional clamp placed across differential pair (A/B) to equalize voltage swing and prevent common-mode overvoltage. Use Value: Withstands repeated 500 W surges without parameter shift, ensuring multi-year field reliability in outdoor telecom cabinets. |
Use Scenario: Integrated into USB 2.0 Type-A port designs to meet IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) ESD immunity. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) TVS positioned between D+/D− and ground to divert ESD without signal distortion. Use Value: Enables full-speed USB data transmission (480 Mbps) while passing system-level ESD validation without firmware resets or disconnect events. |
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_A/I | Same electrical specs and AEC-Q101 qualification, but RoHS-compliant without halogen-free certification. | Acceptable for non-automotive industrial use where halogen content is not restricted. | Select SMA5J26CAHE3_A/I if halogen-free requirement is waived and cost optimization is prioritized. |
| SMA6J26CAHM3_A/I | 600 W PPPM rating (vs. 500 W), same VWM/VC, larger SMA package variant (DO-214AB) with higher thermal mass. | Better suited for high-repetition surge environments (e.g., motor drive feedback loops) requiring extended thermal endurance. | Choose SMA6J26CAHM3_A/I when system-level testing reveals thermal derating issues with SMA5J26CAHM3_A/I under burst-mode transients. |
Compared with SMA5J26CAHE3_A/I and SMA6J26CAHM3_A/I, SMA5J26CAHM3_A/I uniquely balances AEC-Q101 compliance, halogen-free construction, and compact DO-214AC footprint-making it optimal for space-constrained automotive modules where material compliance and reliability are jointly mandated.
Availability
SMA5J26CAHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom infrastructure requiring stable component supply with guaranteed halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMA5J26CAHM3_A/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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability and automotive-grade solutions.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density transient suppression in space-constrained, thermally demanding applications across automotive, industrial, and communications markets.
FAQ
What does the "HM3" suffix indicate in SMA5J26CAHM3_A/I?
The "HM3" suffix in SMA5J26CAHM3_A/I denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-20 and IEC 61249-2-21 standards. It also confirms compliance with JESD 201 Class 2 whisker resistance testing. This designation is critical for automotive Tier 1 suppliers requiring full material declaration and green manufacturing compliance.
Is SMA5J26CAHM3_A/I suitable for protecting CAN bus lines?
Yes, SMA5J26CAHM3_A/I is suitable for CAN bus protection due to its bidirectional clamping, 26 V standoff voltage matching typical 12 V automotive supply rails, and fast response time. Its 42.1 V clamping voltage stays well below the 54 V absolute maximum rating of most CAN transceivers, preventing damage during ISO 16750-2 load dump events.
Does SMA5J26CAHM3_A/I have polarity markings on the package?
No, SMA5J26CAHM3_A/I has no polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMA5J26A), it lacks a cathode band and functions identically in either orientation-simplifying PCB layout and eliminating assembly orientation errors.
What is the minimum recommended PCB pad size for SMA5J26CAHM3_A/I?
The minimum recommended PCB pad size for SMA5J26CAHM3_A/I is 0.2" × 0.2" (5.0 mm × 5.0 mm) copper area per terminal, as specified in the Vishay datasheet for rated 500 W pulse power handling. Smaller pads cause thermal derating and reduce surge current capability, especially above 25 °C ambient.
How does SMA5J26CAHM3_A/I differ from SMA5J26A?
SMA5J26CAHM3_A/I is bidirectional with no polarity marking and symmetric clamping in both directions, whereas SMA5J26A is unidirectional with a cathode band and conducts only in reverse bias. SMA5J26CAHM3_A/I supports AC-coupled or differential line protection; SMA5J26A is limited to DC rail or single-polarity signal protection.
SMA5J26CAHM3_A/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:
- 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:
- 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_A/I FAQ
1.How can I place an order for SMA5J26CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26CAHM3_A/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_A/I reliable?
The price and inventory of SMA5J26CAHM3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J26CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26CAHM3_A/I?
SMA5J26CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26CAHM3_A/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_A/I?
For technical support, including SMA5J26CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26CAHM3_A/I requirements.
6.How does Aetrix verify that SMA5J26CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J26CAHM3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J26CAHM3_A/I?
All SMA5J26CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26CAHM3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMA5J26CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J26CAHM3_A/I Tags
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