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Vishay General Semiconductor - Diodes Division SMBJ26CAHE3/5B
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- Part No.:
- SMBJ26CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26CAHE3/5B.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,187
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Product details
Overview
SMBJ26CAHE3/5B from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 26 V stand-off voltage (VWM), 42.1 V maximum clamping voltage (VC) at 14.3 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives and telecom power supplies.
For engineers reviewing the SMBJ26CAHE3/5B datasheet, SMBJ26CAHE3/5B pinout, SMBJ26CAHE3/5B application, or SMBJ26CAHE3/5B equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device across bidirectional signal or DC bus lines, responding within <1 ps to ESD and surge events per IEC 61000-4-2/4-5. Its glass-passivated junction ensures stable breakdown behavior under repetitive transients, and its low incremental surge resistance minimizes voltage overshoot during high-current surges.
The SMBJ26CAHE3/5B is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020, and supports lead-free reflow up to 260 °C peak. Its bidirectional architecture eliminates polarity concerns in AC-coupled or floating systems, and its 0.106 g unit weight aligns with standard tape-and-reel handling for high-volume assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below circuit rail voltage. |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - Confirmed minimum/maximum breakdown threshold ensuring reliable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 42.1 V at 14.3 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for downstream component voltage rating. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capacity under standardized surge waveform; enables robust protection against lightning-induced transients. |
| IPPM (Peak Pulse Current) | 14.3 A - Maximum non-repetitive surge current the device can safely divert without degradation. |
| TJ max. | +150 °C - Maximum junction temperature; determines thermal derating requirements in enclosed or high-ambient environments. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; used to calculate temperature rise under steady-state power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking for bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reverse-biased path during negative transients | One side of symmetrical PN junction - functions identically to cathode under reverse surge conditions due to bidirectional design. |
| Cathode | Current exit terminal in forward bias; reverse-biased path during positive transients | Second side of symmetrical PN junction - clamps both polarities equally; no band marking on SMBJ26CAHE3/5B. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without external series impedance in many 24–48 V systems. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for ADAS power rails and body control modules. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without moisture-related popcorning; eliminates pre-bake requirement in high-throughput SMT lines. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive 3.3 V or 5 V logic. |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term parameter stability under thermal and humidity stress per JEDEC JESD22-A101. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensing lines against switching-induced dv/dt transients in 48 V BLDC inverters. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across isolated gate drive transformer secondaries and current sense amplifier inputs. Use Value: Limits transient voltage to ≤42.1 V, preventing latch-up or oxide breakdown in SiC MOSFET gate drivers rated for 50 V absolute maximum. |
Use Scenario: Input-stage surge suppression on -48 V DC distribution buses feeding base station RF amplifiers. IC Role / Device Role / Timing Role: Primary-level TVS placed after input filter inductor and before bulk capacitor to absorb lightning-induced common-mode surges. Use Value: Clamps 600 W surges without degradation, maintaining bus integrity during repeated 10/1000 µs events per GR-1089-CORE Section 4.5.2.2. |
| Automotive Body Control Modules | Industrial Sensor Interfaces |
Use Scenario: CAN FD transceiver protection on 12 V battery-supplied nodes exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary-level TVS mounted directly at transceiver pins to limit coupled transients from power supply rails. Use Value: AEC-Q101 qualification ensures survival through 1000 cycles of ISO 16750-2 Test 4b (load dump), preserving communication integrity. |
Use Scenario: Overvoltage protection for 4–20 mA loop-powered pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional clamp across analog input terminals to suppress ESD and inductive kickback from solenoid actuation. Use Value: Symmetrical clamping prevents signal inversion during negative transients, maintaining loop accuracy per IEC 61000-4-2 Level 4 (8 kV contact). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policy. | Choose SMBJ26CA-M3/5B if halogen-free material declaration is required for final product certification. |
| SMAJ26CAHE3/A | Lower peak pulse power (400 W), smaller SMA (DO-214AC) package, same VWM/VC ratings. | Reduced surge margin; suitable only for lower-energy threats (e.g., IEC 61000-4-2 Level 2) or space-constrained layouts. | Use SMAJ26CAHE3/A only where board area is critical and surge threat level is confirmed ≤400 W. |
Compared with SMBJ26CA-M3/5B, the SMBJ26CAHE3/5B offers identical protection performance but differs in material compliance; versus SMAJ26CAHE3/A, it delivers 50 % higher surge energy handling in a slightly larger footprint - making it the preferred choice for industrial and automotive applications requiring full 600 W IEC 61000-4-5 compliance.
Availability
SMBJ26CAHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and industrial sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMBJ26CAHE3/5B 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and telecom systems where AEC-Q101 qualification and 600 W surge capability are mandatory.
FAQ
What is the clamping voltage of SMBJ26CAHE3/5B at its rated peak pulse current?
The SMBJ26CAHE3/5B has a maximum clamping voltage (VC) of 42.1 V at 14.3 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ26CAHE3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C) with minimal drift.
Is SMBJ26CAHE3/5B suitable for automotive applications?
Yes, SMBJ26CAHE3/5B is AEC-Q101 qualified and explicitly listed in Vishay's automotive ordering codes (suffix HE3 denotes RoHS-compliant and AEC-Q101 qualified). It undergoes stress testing including temperature cycling, highly accelerated life testing (HALT), and surge endurance per automotive requirements. The SMBJ26CAHE3/5B is deployed in body control modules, infotainment power supplies, and ADAS camera modules where bidirectional transient suppression is needed.
How does the bidirectional configuration of SMBJ26CAHE3/5B affect its use in DC circuits?
The bidirectional configuration of SMBJ26CAHE3/5B allows it to clamp voltage transients of either polarity symmetrically - making it ideal for protecting DC lines subject to both positive and negative-going surges, such as those induced by inductive load switching or ESD coupling. Unlike unidirectional TVS diodes, SMBJ26CAHE3/5B requires no polarity consideration during placement, simplifying layout and eliminating risk of reverse installation. Its VBR and VC values are identical in both directions.
What is the thermal resistance of SMBJ26CAHE3/5B, and how does it impact PCB layout?
The SMBJ26CAHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 board construction and natural convection cooling. To maintain safe junction temperatures during repetitive surges or elevated ambient conditions, designers must ensure adequate copper area and avoid thermal isolation. The SMBJ26CAHE3/5B's RθJA directly informs derating curves in Figure 2 of its datasheet.
Does SMBJ26CAHE3/5B require a series current-limiting resistor in typical protection circuits?
No, SMBJ26CAHE3/5B is designed for direct parallel connection across protected lines and does not require an external series current-limiting resistor for standard IEC 61000-4-2 or -4-5 surge suppression. Its low dynamic impedance and fast response (<1 ps) enable effective clamping without added components. However, in high-repetition-rate surge environments or where steady-state leakage must be minimized, a small series resistor may be added - but this is not part of the SMBJ26CAHE3/5B's intrinsic design requirement.
SMBJ26CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 14.3A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ26CAHE3/5B FAQ
1.How can I place an order for SMBJ26CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26CAHE3/5B 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 SMBJ26CAHE3/5B reliable?
The price and inventory of SMBJ26CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ26CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26CAHE3/5B?
SMBJ26CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26CAHE3/5B 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 SMBJ26CAHE3/5B?
For technical support, including SMBJ26CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ26CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ26CAHE3/5B 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 SMBJ26CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ26CAHE3/5B?
All SMBJ26CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26CAHE3/5B, 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 SMBJ26CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ26CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26CAHE3/5B Tags
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