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SMB8J26C-E3/5B Equivalent & Substitute Parts
Part Overview
The SMB8J26C-E3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 26V reverse standoff voltage and provides clamping at 46.6V maximum. The part is currently classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Substitute parts maintain the same electrical protection characteristics while offering active product status and improved availability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SMB8J26C-E3/5B |
| Manufacturer | Vishay General Semiconductor - Diodes Division |
| Category | Transient Voltage Suppressors (TVS) |
| Package / Case | DO-214AA, SMB |
| Voltage - Reverse Standoff (Typ) | 26V |
| Voltage - Breakdown (Min) | 28.9V |
| Voltage - Clamping (Max) @ Ipp | 46.6V |
| Current - Peak Pulse (10/1000µs) | 17.2A |
| Power - Peak Pulse | 800W |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the SMB8J26C-E3/5B is determined by the following critical electrical and mechanical parameters:
Mandatory Matching Parameters:
- Voltage - Reverse Standoff (Typ): 26V
- Voltage - Breakdown (Min): 28.9V
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Type: Zener (Bidirectional, 1 Channel)
- Applications: General Purpose
Allowable Variation Parameters:
- Voltage - Clamping (Max) @ Ipp: 42.1V to 46.6V (lower clamping voltage acceptable for improved protection margin)
- Current - Peak Pulse (10/1000µs): 14.2A to 19A (higher current rating acceptable)
- Power - Peak Pulse: 600W to 800W (higher power rating acceptable)
- Operating Temperature Range: -55°C to -65°C minimum; 150°C to 175°C maximum (extended ranges acceptable)
Substitute parts must maintain identical voltage standoff and breakdown specifications while accommodating improved electrical performance characteristics. All substitutes are ROHS3 compliant with MSL 1 rating.
Parameter Comparison
| Parameter | SMB8J26C-E3/5B (Main) | SMB8J26CA-E3/5B | SMBJ26CA (EVVO) | SMBJ26CA-HR (Littelfuse) | SMBJ26CA-HRA (Littelfuse) | SMBJ26CA-TP (MCC) | SMBJ26CA-TR (STMicroelectronics) |
|---|---|---|---|---|---|---|---|
| Manufacturer | Vishay | Vishay | EVVO Semi | Littelfuse | Littelfuse | Micro Commercial Co | STMicroelectronics |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active |
| Voltage - Reverse Standoff (Typ) | 26V | 26V | 26V | 26V | 26V | 26V | 26V |
| Voltage - Breakdown (Min) | 28.9V | 28.9V | 28.9V | 28.9V | 28.9V | 28.9V | 28.9V |
| Voltage - Clamping (Max) @ Ipp | 46.6V | 42.1V | 42.1V | 42.1V | 42.1V | 42.1V | 42.1V |
| Current - Peak Pulse (10/1000µs) | 17.2A | 19A | 14.3A | 14.3A | 14.3A | 14.2A | 14.9A |
| Power - Peak Pulse | 800W | 800W | 600W | 600W | 600W | 600W | 600W |
| Operating Temperature Range | -55°C ~ 150°C | -55°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C | -55°C ~ 175°C | -55°C ~ 150°C |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
All listed substitute parts maintain electrical compatibility with the SMB8J26C-E3/5B through identical voltage standoff (26V) and breakdown (28.9V) specifications. Selection among active alternatives should prioritize product availability and supply chain stability.
Primary Recommendation: SMB8J26CA-E3/5B (Vishay) maintains the closest electrical profile with 42.1V clamping voltage and 19A peak pulse current, offering improved performance margin while preserving the original manufacturer's design lineage and active product status.
Alternative Selections:
- SMBJ26CA-HR or SMBJ26CA-HRA (Littelfuse SMBJ-HR/HRA series) provide established reliability with extended temperature range to -65°C and active inventory support.
- SMBJ26CA-TP (Micro Commercial Co) offers the widest operating temperature range (-55°C to 175°C) for applications requiring extended thermal performance.
- SMBJ26CA-TR (STMicroelectronics TRANSIL™ series) delivers mid-range specifications with active status and established supply availability.
- SMBJ26CA (EVVO Semi) provides cost-effective substitution with extended low-temperature rating (-65°C) and high inventory levels.
All substitutes carry ROHS3 compliance and MSL 1 rating, matching the original part's environmental and regulatory requirements.
Frequently Asked Questions (FAQ)
Q: Can SMB8J26C-E3/5B be directly replaced with any of the listed substitutes?
A: Direct replacement is possible for all listed parts. All substitutes maintain the mandatory electrical parameters: 26V reverse standoff voltage, 28.9V minimum breakdown voltage, and DO-214AA SMB surface-mount package. Clamping voltage variations (42.1V vs. 46.6V) represent improved protection performance rather than degradation.
Q: What is the significance of the lower clamping voltage in substitute parts?
A: Substitute parts with 42.1V clamping voltage (versus 46.6V in the original) provide tighter voltage regulation during transient suppression events. This represents enhanced protection capability and is acceptable for direct substitution in applications designed for the original part.
Q: Are there packaging differences between substitute options?
A: All substitutes use the DO-214AA SMB surface-mount package. Packaging format variations (Tape & Reel, Cut Tape, Digi-Reel) affect supply and handling but do not impact electrical or mechanical compatibility. Select packaging format based on procurement and assembly requirements.
Q: Which substitute offers the best temperature performance?
A: SMBJ26CA-TP (Micro Commercial Co) provides the widest operating range at -55°C to 175°C. SMBJ26CA (EVVO Semi), SMBJ26CA-HR, and SMBJ26CA-HRA extend the minimum temperature to -65°C. Standard substitutes maintain -55°C to 150°C matching the original specification.
Q: Do all substitutes meet the same compliance standards?
A: All listed substitutes are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original SMB8J26C-E3/5B specifications. REACH status is unaffected for all parts.
Q: What is the inventory status for each substitute?
A: SMB8J26CA (EVVO Semi) offers the highest inventory at 55,200 pieces. SMB8J26CA-E3/5B (Vishay) provides 1,049 pieces. Littelfuse options (SMBJ26CA-HR: 659 pcs; SMBJ26CA-HRA: 1,146 pcs) and STMicroelectronics SMBJ26CA-TR (2,800 pcs) maintain active stock. Micro Commercial Co SMBJ26CA-TP carries 4,400 pieces.
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