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1.5KE75A-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts
Part Overview
The 1.5KE75A-B is a unidirectional transient voltage suppressor diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in through-hole applications. This component features a 64.1V reverse standoff voltage with 103V maximum clamping voltage and 1500W peak pulse power rating in a DO-201 package. The original part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for circuit protection applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 64.1 | V |
| Voltage - Breakdown (Min) | 71.3 | V |
| Voltage - Clamping (Max) @ Ipp | 103 | V |
| Current - Peak Pulse (10/1000µs) | 14.6 | A |
| Power - Peak Pulse | 1500 | W |
| Type | Zener | - |
| Unidirectional Channels | 1 | - |
| Mounting Type | Through Hole | - |
| Operating Temperature Range | -55 to 175 | °C |
| RoHS Status | ROHS3 Compliant | - |
Substitute Part Grouping Explanation
Substitute parts for the 1.5KE75A-B are categorized based on strict electrical and mechanical parameter alignment:
Direct Electrical Equivalents (Same Power Rating - 1500W): Parts maintaining identical or near-identical reverse standoff voltage (64.1V ±0.5V), breakdown voltage (71.3V ±0.2V), clamping voltage (103V ±1V), and peak pulse current (14.6A ±0.4A) in compatible through-hole packages qualify as direct substitutes. These include 1.5CE75A TR PBFREE, 1.5KE75A (Taiwan Semiconductor Corporation), 1.5KE75A-B (Littelfuse Inc.), 1.5KE75A-G (Comchip Technology), and 1.5KE75A-TP (Micro Commercial Co).
Package Variant Equivalents: The 1N5654A maintains identical electrical specifications but uses a DO-13 package instead of DO-201, requiring PCB layout modification. The 1V5KE75A uses a DO-201AD package with 104V clamping voltage (1V higher than nominal).
Higher Power Alternatives: The 5KP58E3/TR13 and 5KP64AE3/TR13 provide 5000W peak pulse power with P600 packages, suitable for applications requiring increased transient energy absorption but with different physical dimensions.
Parameter Comparison
| Part Number | Manufacturer | Vwm (V) | Vbr (V) | Vc (V) | Ipp (A) | Power (W) | Package | Status |
|---|---|---|---|---|---|---|---|---|
| 1.5KE75A-B | Diodes Incorporated | 64.1 | 71.3 | 103 | 14.6 | 1500 | DO-201 | Obsolete |
| 1.5CE75A TR PBFREE | Central Semiconductor Corp | 64.1 | 71.3 | 103 | 14.6 | 1500 | DO-201 | Active |
| 1.5KE75A | Taiwan Semiconductor Corporation | 64.1 | 71.3 | 103 | 15.0 | 1500 | DO-201 | Active |
| 1.5KE75A-B | Littelfuse Inc. | 64.1 | 71.3 | 103 | 14.8 | 1500 | DO-201 | Active |
| 1.5KE75A-G | Comchip Technology | 64.1 | 71.25 | 103 | 14.56 | 1500 | DO-201 | Active |
| 1.5KE75A-TP | Micro Commercial Co | 64.1 | 71.3 | 103 | 14.8 | 1500 | DO-201AE | Active |
| 1N5654A | Solid State Inc. | 64.1 | 71.3 | 103 | 14.6 | 1500 | DO-13 | Active |
| 1V5KE75A | Taiwan Semiconductor Corporation | 64.1 | 71.3 | 104 | 14.6 | 1500 | DO-201AD | Active |
| 5KP58E3/TR13 | Microchip Technology | 58.0 | 64.4 | 103 | 48.5 | 5000 | P600 | Active |
| 5KP64AE3/TR13 | Microchip Technology | 64.0 | 71.1 | 103 | 48.5 | 5000 | P600 | Active |
| TP6KE75A | Littelfuse Inc. | 64.1 | 71.3 | 103 | 5.9 | 600 | DO-204AC | Active |
Engineering Selection Recommendations
Primary Substitutes (Direct Replacement): The 1.5KE75A from Taiwan Semiconductor Corporation and 1.5KE75A-B from Littelfuse Inc. are recommended as primary replacements. Both maintain active product status, full RoHS3 compliance, and electrical parameters within 2% of the original specification. The Littelfuse variant includes automotive-grade qualification options.
Secondary Substitutes (Electrical Equivalence with Package Consideration): The 1.5CE75A TR PBFREE from Central Semiconductor Corp provides identical electrical performance with active status and higher inventory availability (2487 units). The 1.5KE75A-G from Comchip Technology offers active status with AEC-Q101 automotive qualification. Selection between these depends on supply chain requirements and packaging format preference (Cut Tape vs. Tape & Box).
Package Variant Substitutes: The 1N5654A maintains full electrical equivalence but requires PCB layout modification due to DO-13 package geometry. The 1V5KE75A provides a 1V higher clamping voltage in DO-201AD package, acceptable for applications with 1V tolerance margin. The TP6KE75A operates at reduced peak pulse current (5.9A vs. 14.6A) and lower power rating (600W), suitable only for lower-energy transient applications.
Higher Power Alternatives: The 5KP64AE3/TR13 from Microchip Technology provides 5000W peak pulse power with matching 64V standoff voltage, applicable to high-energy transient environments. This substitution requires verification of PCB thermal management and mechanical mounting compatibility due to P600 package dimensions.
Frequently Asked Questions (FAQ)
Q: Can 1.5KE75A-B be directly replaced with 1.5KE75A? A: Yes. The 1.5KE75A from Taiwan Semiconductor Corporation maintains identical reverse standoff voltage (64.1V), breakdown voltage (71.3V), clamping voltage (103V), and power rating (1500W). Peak pulse current differs by 0.4A (15A vs. 14.6A), which is within acceptable tolerance for general-purpose protection circuits. Both use DO-201 through-hole packages.
Q: What is the difference between DO-201 and DO-13 packages? A: DO-201 (also designated DO-27) and DO-13 are both axial through-hole packages but differ in physical dimensions. DO-201 is larger with greater lead spacing, while DO-13 is more compact. The 1N5654A uses DO-13 packaging and requires PCB layout modification. Verify PCB hole spacing and thermal clearance before substitution.
Q: Can 5KP64AE3/TR13 replace 1.5KE75A-B? A: Electrical substitution is possible due to matching 64V standoff voltage and 103V clamping voltage. However, the 5KP64AE3/TR13 uses a P600 package with significantly different physical dimensions compared to DO-201. This substitution requires PCB redesign and is recommended only for applications requiring the higher 5000W power rating. Standard 1500W applications should use 1.5KE75A variants.
Q: Are all substitute parts RoHS3 compliant? A: All listed substitute parts maintain RoHS3 compliance. The 1.5CE75A TR PBFREE explicitly indicates lead-free construction. Verify REACH compliance status with your supplier, as some variants show "REACH Unaffected" or "Vendor Undefined" designations.
Q: What is the operating temperature range difference between substitutes? A: Most 1.5KE75A variants operate from -55°C to 175°C. The 1.5CE75A TR PBFREE extends the lower limit to -65°C. The 1.5KE75A-G from Comchip Technology operates to 150°C maximum. Verify application temperature requirements before selection.
Q: Is automotive qualification available for substitutes? A: Yes. The 1.5KE75A-TP from Micro Commercial Co includes automotive-grade designation. The TP6KE75A from Littelfuse Inc. carries AEC-Q101 qualification. Standard industrial-grade variants are available from other manufacturers. Specify automotive qualification if required by application standards.
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