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Vishay General Semiconductor - Diodes Division SMA5J26CAHM3/H
- Part No.:
- SMA5J26CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26CAHM3/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,865
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Product details
Overview
SMA5J26CAHM3/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), 28.9–31.9 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 µs), clamping voltage of 42.1 V at 11.9 A IPPM, and operates from –55 °C to +150 °C - used in automotive sensor interface protection.
For engineers reviewing the SMA5J26CAHM3/H datasheet, SMA5J26CAHM3/H pinout, SMA5J26CAHM3/H application, or SMA5J26CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and stable clamping under repetitive transients. Its bidirectional architecture enables symmetric suppression of positive and negative polarity surges without polarity marking - critical for AC-coupled or differential signal lines.
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 MSL Level 1 (260 °C reflow peak) and supports automotive-grade reliability via AEC-Q101 qualification under HM3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 28.9 V / 31.9 V at 1 mA - ensures reliable breakdown onset within defined tolerance band |
| VC @ IPPM | 42.1 V at 11.9 A - clamping voltage limits downstream IC stress during 500 W surge events |
| PPPM | 500 W (10/1000 µs) - defines energy-handling capacity for lightning and ESD-like transients |
| TJ range | –55 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with standard pick-and-place and reflow processes |
| Compliance | AEC-Q101 qualified, halogen-free, RoHS-compliant - meets automotive supply chain requirements |
Pinout & Package
SMA5J26CAHM3/H is housed in an SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, UL 94 V-0 flammability rating, and no polarity marking (bidirectional type). Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per JEDEC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Transient current path | Bidirectional conduction - either terminal serves as anode or cathode depending on surge polarity |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and contributes to thermal dissipation via PCB copper area |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables compact layout in space-constrained modules such as ADAS camera ECUs and infotainment head units |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| 500 W peak pulse rating | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges without degradation |
| AEC-Q101 qualification (HM3) | Validated for automotive applications including engine control, body electronics, and chassis systems |
| MSL Level 1 (260 °C) | Supports single-reflow assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceivers |
|---|---|
Use Scenario: Protecting LIN/CAN signal lines in vehicle door modules against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching transceiver IC. Use Value: Limits voltage seen by MAX13041 or TJA1042T/3 transceivers to ≤42.1 V during 500 W surges, preserving signal integrity and preventing latch-up. | Use Scenario: Surge protection on RS-485/CAN bus lines in factory automation PLC I/O modules exposed to motor drive noise. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on differential bus pairs, working alongside common-mode chokes. Use Value: Clamps common-mode transients up to ±30 kV contact ESD (IEC 61000-4-2) while maintaining <1 μA leakage at 26 V DC bias. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Card Protection |
Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters after primary-side isolation. IC Role / Device Role / Timing Role: Fast-response clamp across DC output rails to prevent damage to USB-PD controller and FET drivers during output short-circuit recovery. Use Value: Responds in <1 ns to suppress 100 V transients from transformer ringing, limiting rail overshoot to 42.1 V with no recovery delay. | Use Scenario: Protection of ADSL/VDSL line interface ICs (e.g., Lantiq XWAY VRX200) against lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: First-stage protector mounted at line entry before hybrid transformer and line driver. Use Value: Handles 10/700 µs telecom surges per ITU-T K.21 Basic Level with 500 W rating and 42.1 V clamping, reducing need for secondary GDT stages. |
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/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial/industrial use only - not approved for automotive production | Select SMA5J26CAHE3/H where halogen content and automotive qualification are not required |
| SMCJ26CAHM3 | Higher 1500 W PPPM rating; larger SMC (DO-214AB) package; same VWM/VBR/VC | Used where higher surge margin is needed (e.g., EV charging station inputs); requires larger PCB area | Choose SMCJ26CAHM3 when system-level surge testing exceeds 500 W or when board layout allows larger footprint |
Compared with SMA5J26CAHM3/H, SMA5J26CAHE3/H omits halogen-free and AEC-Q101 compliance - making it unsuitable for automotive Tier 1 designs - while SMCJ26CAHM3 trades compactness for 3× higher surge capacity, requiring layout revision and thermal reassessment.
Availability
SMA5J26CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom line card protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMA5J26CAHM3/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 performance.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered for high-power-density transient suppression in automotive, industrial, and communications systems where compact size and AEC-Q101 compliance are mandatory.
FAQ
What does the "HM3" suffix mean in SMA5J26CAHM3/H?
The "HM3" suffix in SMA5J26CAHM3/H indicates halogen-free, RoHS-compliant construction and AEC-Q101 qualification - verified per Vishay's automotive reliability test plan. This distinguishes it from E3 (RoHS only) and HE3 (RoHS + AEC-Q101, not halogen-free) variants. The "H" denotes tape-and-reel packaging per ordering code conventions.
Is SMA5J26CAHM3/H unidirectional or bidirectional?
SMA5J26CAHM3/H is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number and absence of cathode band marking. Its electrical characteristics - including symmetric VBR, ID, and VC - apply identically in both polarities, enabling protection of AC-coupled or differential signal paths without orientation constraints.
What is the maximum clamping voltage of SMA5J26CAHM3/H and at what current?
The maximum clamping voltage (VC) of SMA5J26CAHM3/H is 42.1 V, measured at the peak pulse current (IPPM) of 11.9 A under a 10/1000 µs waveform. This value is specified in Vishay's datasheet Document Number 88875, Table "ELECTRICAL CHARACTERISTICS", row for SMA5J26A - applicable to SMA5J26CAHM3/H due to identical core TVS structure and rating.
Can SMA5J26CAHM3/H be used in place of SMA5J26A?
No - SMA5J26CAHM3/H is bidirectional, while SMA5J26A is unidirectional. They differ in polarity marking (band present on SMA5J26A, absent on SMA5J26CAHM3/H), forward voltage behavior, and leakage symmetry. Substitution requires circuit review: SMA5J26CAHM3/H may be used only where bidirectional clamping is intended and no DC forward conduction path exists.
What is the thermal resistance specification for SMA5J26CAHM3/H?
SMA5J26CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W and junction-to-lead resistance (RθJL) of 25 °C/W, measured on 0.2" × 0.2" copper pads per terminal. These values assume JEDEC-standard mounting and define temperature rise under sustained power dissipation - critical for derating calculations above 25 °C ambient.
SMA5J26CAHM3/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):
- 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/H FAQ
1.How can I place an order for SMA5J26CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26CAHM3/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/H reliable?
The price and inventory of SMA5J26CAHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMA5J26CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26CAHM3/H?
SMA5J26CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26CAHM3/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/H?
For technical support, including SMA5J26CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26CAHM3/H requirements.
6.How does Aetrix verify that SMA5J26CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J26CAHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMA5J26CAHM3/H?
All SMA5J26CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26CAHM3/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/H part is unused and in its original packaging.
Return procedure for SMA5J26CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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