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Vishay General Semiconductor - Diodes Division SMA5J26CAHM3_A/H
- Part No.:
- SMA5J26CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26CAHM3_A/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,721
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Product details
Overview
SMA5J26CAHM3_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 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), commonly deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J26CAHM3_A/H datasheet, SMA5J26CAHM3_A/H pinout, SMA5J26CAHM3_A/H application, or SMA5J26CAHM3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), and halogen-free RoHS compliance per ordering suffix HM3.
Technical Context
This device operates as a voltage-clamped crowbar during transients, with symmetrical breakdown characteristics in both directions due to its bidirectional construction. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), enabling protection of sensitive CMOS inputs against ESD and load-dump events.
The SMA5J26CAHM3_A/H is rated for TJ = –55 °C to +150 °C operation and meets MSL Level 1 (260 °C reflow peak). Its 500 W surge rating applies under standardized 10/1000 μs waveform conditions with derating above 25 °C ambient, per Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 28.9 V / 31.9 V - Breakdown occurs within this range at 1 mA test current, confirming bidirectional threshold consistency |
| VC @ IPPM | 42.1 V - Clamped voltage seen by protected circuit when subjected to 11.9 A transient current |
| PPPM | 500 W - Peak surge power handling capability under 10/1000 μs waveform, defining robustness against lightning-induced surges |
| IPPM | 11.9 A - Maximum non-repetitive surge current the device can safely divert without failure |
| TJ max | +150 °C - Maximum junction temperature, supporting operation in under-hood automotive environments |
| RθJA | 80 °C/W - Thermal resistance from junction to ambient on standard 5.0 mm × 5.0 mm copper pads, guiding PCB thermal layout |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-020 (MSL Level 1, 260 °C peak). Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode/Anode (unmarked) | Reversible terminals | Both ends function identically; no cathode band-enables symmetric placement in AC-coupled or differential lines |
| Anode/Cathode (reversed) | Reversible terminals | Identical electrical behavior in either orientation-eliminates assembly orientation errors in bidirectional protection paths |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-201 Class 2 whisker resistance and EU RoHS Directive 2011/65/EU requirements |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 13.2 V) and lower let-through energy during fast transients |
| Glass passivated junction | Provides stable leakage performance (<1.0 μA at VWM) and long-term parameter stability over temperature and life |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing at 260 °C peak without baking preconditioning |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and outputs from ISO 7637-2 pulse 1, 2a, and 5a transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines or between signal line and chassis ground. Use Value: Clamps 42.1 V at 11.9 A to keep transceiver input voltage within safe operating range during 100 V/50 ms load dump events. |
Use Scenario: Guarding RS-485/RS-422 transceivers in factory automation controllers against EFT and surge per IEC 61000-4-4/5. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on data pair (A/B) and common-mode lines. Use Value: Limits induced surge voltage to ≤42.1 V while maintaining <1.0 μA leakage at 26 V, preserving signal integrity at 1 Mbps. |
| Consumer Power Adapter Input | Telecom DSL Line Protection |
Use Scenario: Secondary-side DC output protection in wall adapters exposed to conducted surges via USB-C PD negotiation lines. IC Role / Device Role / Timing Role: Bidirectional clamp across VBUS and GND to absorb coupling from primary-side transients. Use Value: Withstands 500 W pulses without degradation, ensuring sustained protection over >100,000 surge events per JEDEC JESD22-A114. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Differential-mode TVS placed across tip/ring conductors upstream of transformer coupling. Use Value: Symmetrical clamping maintains balanced line impedance and prevents common-mode distortion during 10/1000 μs surges up to 11.9 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J26CAHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free; uses P/NHE3 suffix instead of HM3 | Lacks halogen-free certification; acceptable where material compliance is limited to RoHS only | Select SMA5J26CAHE3_A/H if halogen content is not restricted in target market or end-equipment standard |
| SMA6J26CA-M3/5A | 600 W rating (vs. 500 W); higher IPPM (13.3 A); same VWM/VC; DO-214AC package, halogen-free | Higher surge margin supports harsher environments (e.g., commercial vehicle alternator load dump) | Choose SMA6J26CA-M3/5A when system-level surge testing exceeds IEC 61000-4-5 Level 4 (4 kV line-earth) |
Compared with SMA5J26CAHE3_A/H, the SMA5J26CAHM3_A/H adds halogen-free compliance without sacrificing clamping performance; versus SMA6J26CA-M3/5A, it trades 100 W surge headroom for tighter cost and footprint control in consumer-grade designs.
Availability
SMA5J26CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, and telecom line cards requiring stable component supply with AEC-Q101 validation and halogen-free materials compliance.
Supply support for SMA5J26CAHM3_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 application-specific optimization.
The SMA5JxxCA family delivers high-power-density TVS solutions targeting automotive, industrial, and telecom surge standards, with design focus on bidirectional symmetry, low clamping ratio, and process-controlled junction stability.
FAQ
What does the "HM3" suffix indicate in SMA5J26CAHM3_A/H?
The "HM3" suffix in SMA5J26CAHM3_A/H denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-201 Class 2 whisker resistance requirements. It distinguishes this variant from HE3 (RoHS only) and confirms compliance with environmental regulations such as IEC 61249-2-21. The SMA5J26CAHM3_A/H is also AEC-Q101 qualified for automotive use.
Is SMA5J26CAHM3_A/H suitable for protecting CAN FD bus lines?
Yes, SMA5J26CAHM3_A/H is suitable for CAN FD bus protection due to its 26 V standoff voltage matching typical 12 V automotive supply rails, 42.1 V clamping level below CAN transceiver absolute maximum ratings, and bidirectional symmetry preserving differential signaling integrity. Its 11.9 A IPPM handles ISO 16750-2 pulse 5a surges.
Does SMA5J26CAHM3_A/H have polarity markings on the package?
No, SMA5J26CAHM3_A/H has no polarity markings because it is a bidirectional TVS diode. Both terminals are electrically identical, eliminating orientation concerns during automated placement. This contrasts with unidirectional variants (e.g., SMA5J26A) that feature a cathode band.
What is the maximum junction temperature rating for SMA5J26CAHM3_A/H?
The maximum junction temperature (TJ max) for SMA5J26CAHM3_A/H is +150 °C, validated per AEC-Q101 stress testing. This enables reliable operation in under-hood automotive environments and industrial enclosures where ambient temperatures exceed 105 °C, provided PCB thermal design maintains RθJA ≤ 80 °C/W.
How does the clamping voltage of SMA5J26CAHM3_A/H compare to its breakdown voltage?
SMA5J26CAHM3_A/H has a VBR range of 28.9 V to 31.9 V at 1 mA and clamps to 42.1 V at 11.9 A, yielding a clamping ratio (VC/VBRmin) of ~1.46. This low ratio indicates efficient energy diversion with minimal let-through voltage-critical for safeguarding 3.3 V or 5 V logic interfaces downstream of the TVS.
SMA5J26CAHM3_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:
- 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/H FAQ
1.How can I place an order for SMA5J26CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26CAHM3_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 SMA5J26CAHM3_A/H reliable?
The price and inventory of SMA5J26CAHM3_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 SMA5J26CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J26CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26CAHM3_A/H?
SMA5J26CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26CAHM3_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 SMA5J26CAHM3_A/H?
For technical support, including SMA5J26CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26CAHM3_A/H requirements.
6.How does Aetrix verify that SMA5J26CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J26CAHM3_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 SMA5J26CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J26CAHM3_A/H?
All SMA5J26CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26CAHM3_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 SMA5J26CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMA5J26CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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