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SMBJ26A-HRA Equivalent & Substitute Parts
Part Overview
The SMBJ26A-HRA is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 26V reverse standoff voltage and provides 42.1V maximum clamping voltage at peak pulse current of 14.3A, delivering 600W peak pulse power dissipation. The device is housed in a DO-214AA (SMB) package and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). The SMBJ26A-HRA maintains active product status with 1052 units currently in stock.
Equivalent and substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative packaging formats are required, or when sourcing from multiple qualified manufacturers is needed to ensure supply chain continuity and cost optimization.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 26 | V |
| Voltage - Breakdown (Min) | 28.9 | V |
| Voltage - Clamping (Max) @ Ipp | 42.1 | V |
| Current - Peak Pulse (10/1000µs) | 14.3 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -65°C to 150°C | TJ |
| Package / Case | DO-214AA, SMB | |
| Mounting Type | Surface Mount | |
| RoHS Status | ROHS3 Compliant | |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the SMBJ26A-HRA is determined by strict adherence to the following electrical and mechanical parameters:
Critical Parameters (Must Match):
- Voltage - Reverse Standoff (Typ): 26V
- Voltage - Breakdown (Min): 28.9V
- Voltage - Clamping (Max) @ Ipp: 42.1V
- Current - Peak Pulse (10/1000µs): 14.3A ±tolerance
- Power - Peak Pulse: 600W minimum
- Package / Case: DO-214AA or DO-214AC (SMB/SMA variants)
- Mounting Type: Surface Mount
- Type: Zener (Unidirectional)
- Unidirectional Channels: 1
Acceptable Variations:
- Operating Temperature Range: -55°C to 150°C is acceptable (wider range than original -65°C to 150°C)
- Packaging Format: Tape & Reel (TR), Cut Tape (CT), or Digi-Reel® are functionally equivalent
- Manufacturer: Any qualified manufacturer meeting electrical specifications
- Series designation: May vary (TransZorb®, SMBJ, SMBJ-Q, TRANSIL™, etc.)
- Peak Pulse Current: ±5% tolerance acceptable (14.3A ±0.7A range)
Parts that deviate from critical parameters or introduce higher power ratings (1000W) are listed for reference but represent design upgrades rather than direct substitutes.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Vr (Typ) V | Vbr (Min) V | Vc (Max) V | Ipp A | Ppk W | Temp Range °C | Package | Packaging Format |
|---|---|---|---|---|---|---|---|---|---|
| SMBJ26A-HRA | Littelfuse Inc. | 26 | 28.9 | 42.1 | 14.3 | 600 | -65 to 150 | DO-214AA, SMB | Tape & Reel (TR) |
| SMBJ26A | EVVO Semi | 26 | 28.9 | 42.1 | 14.3 | 600 | -65 to 150 | DO-214AC, SMA | Cut Tape (CT) & Digi-Reel® |
| SMBJ26A-E3/52 | Vishay General Semiconductor - Diodes Division | 26 | 28.9 | 42.1 | 14.3 | 600 | -55 to 150 | DO-214AA, SMB | Tape & Reel (TR) |
| SMBJ26A-E3/5B | Vishay General Semiconductor - Diodes Division | 26 | 28.9 | 42.1 | 14.3 | 600 | -55 to 150 | DO-214AA, SMB | Tape & Reel (TR) |
| ATV06B260J-HF | Comchip Technology | 26 | 28.9 | 42.1 | 14.25 | 600 | -55 to 150 | DO-214AA, SMB | Tape & Reel (TR) |
| SMB10J26A-E3/52 | Vishay General Semiconductor - Diodes Division | 26 | 28.9 | 42.1 | 23.8 | 1000 | -55 to 150 | DO-214AA, SMB | Tape & Reel (TR) |
| SMBJ26A-13-F | Diodes Incorporated | 26 | 28.9 | 42.1 | 14.2 | 600 | -55 to 150 | DO-214AA, SMB | Cut Tape (CT) & Digi-Reel® |
| SMBJ26A-Q | Bourns Inc. | 26 | 28.9 | 42.1 | 14.3 | 600 | -55 to 150 | DO-214AA, SMB | Tape & Reel (TR) |
| SMBJ26A-TR | STMicroelectronics | 26 | 28.9 | 42.1 | 14.9 | 600 | -55 to 150 | DO-214AA, SMB | Cut Tape (CT) & Digi-Reel® |
Engineering Selection Recommendations
Direct Equivalents (Recommended Primary Substitutes):
SMBJ26A-E3/52 and SMBJ26A-E3/5B from Vishay General Semiconductor maintain identical electrical specifications with DO-214AA SMB packaging. Both are ROHS3 compliant with unlimited MSL rating. The narrower operating temperature range (-55°C to 150°C versus -65°C to 150°C) is acceptable for most general-purpose applications. Inventory availability is 2000 and 4203 units respectively.
SMBJ26A-13-F from Diodes Incorporated provides equivalent performance with peak pulse current of 14.2A (within tolerance) and 600W power rating. This part is available in high volume (416,200 units) in Cut Tape and Digi-Reel® packaging formats, offering supply chain flexibility.
SMBJ26A-Q from Bourns Inc. matches all critical electrical parameters with AEC-Q101 automotive qualification. This part is suitable for applications requiring automotive-grade components and is ROHS3 compliant.
SMBJ26A-TR from STMicroelectronics delivers equivalent voltage and power specifications with peak pulse current of 14.9A. The TRANSIL™ series designation indicates qualified performance for general-purpose transient suppression.
Alternative Packaging Format:
SMBJ26A from EVVO Semi provides identical electrical performance (26V standoff, 42.1V clamping, 14.3A peak pulse, 600W power) in DO-214AC SMA package format with extended temperature range (-65°C to 150°C). This option is suitable when SMA package compatibility is required, with 39,700 units in stock.
Design Upgrade Option:
SMB10J26A-E3/52 from Vishay General Semiconductor represents a higher-performance variant with 23.8A peak pulse current and 1000W power dissipation while maintaining identical voltage specifications. This part is appropriate for applications requiring enhanced transient energy absorption capability.
Compliance Considerations:
All listed substitutes maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Parts designated with AEC-Q101 qualification (ATV06B260J-HF, SMBJ26A-Q) are suitable for automotive applications. REACH status varies; verify compliance requirements for specific end-use applications.
Frequently Asked Questions (FAQ)
Q: Can SMBJ26A-E3/52 replace SMBJ26A-HRA in all applications?
A: Yes. Both parts share identical electrical specifications: 26V reverse standoff, 28.9V minimum breakdown, 42.1V maximum clamping voltage, and 14.3A peak pulse current at 600W power dissipation. The operating temperature range difference (-55°C to 150°C versus -65°C to 150°C) is acceptable for general-purpose applications. Both are ROHS3 compliant with MSL 1 rating.
Q: What is the difference between DO-214AA and DO-214AC packages?
A: DO-214AA (SMB) and DO-214AC (SMA) are physically distinct surface-mount packages with different footprints and lead configurations. DO-214AA is the standard SMB package used in SMBJ26A-HRA. DO-214AC (SMA) is a smaller variant. Package selection depends on PCB layout requirements. Electrical performance is equivalent when specifications match.
Q: Is SMBJ26A-13-F from Diodes Incorporated a direct substitute?
A: Yes, with minor tolerance consideration. Peak pulse current is specified at 14.2A versus 14.3A in the original part, representing a 0.7% difference within acceptable engineering tolerance. All voltage parameters (26V standoff, 28.9V breakdown, 42.1V clamping) and 600W power rating are identical. ROHS3 compliance and MSL 1 rating match the original specification.
Q: When should SMB10J26A-E3/52 be used instead of direct equivalents?
A: SMB10J26A-E3/52 is a design upgrade, not a direct substitute. It provides higher peak pulse current (23.8A) and power dissipation (1000W) while maintaining identical voltage specifications. Use this part when circuit analysis determines that higher transient energy absorption is required beyond the 600W capability of standard SMBJ26A variants.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). Verify REACH status for specific regulatory requirements; REACH status varies by manufacturer and should be confirmed for end-use applications.
Q: What is the significance of AEC-Q101 qualification on SMBJ26A-Q and ATV06B260J-HF?
A: AEC-Q101 qualification indicates that these parts meet automotive industry reliability and quality standards established by the Automotive Electronics Council. These parts are suitable for automotive applications requiring qualified component status. Non-automotive applications do not require this qualification.
Q: Can packaging format (Tape & Reel versus Cut Tape) affect electrical performance?
A: No. Packaging format (Tape & Reel, Cut Tape, or Digi-Reel®) affects only handling, storage, and assembly logistics. Electrical specifications, performance characteristics, and reliability are identical regardless of packaging format. Selection should be based on manufacturing equipment compatibility and supply chain requirements.
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