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SA54CA Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts
Part Overview
The SA54CA is a 54V Zener transient voltage suppressor diode manufactured by onsemi in DO-15 through-hole packaging. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for general-purpose transient voltage suppression applications. The SA54CA delivers 87.1V maximum clamping voltage at 5.7A peak pulse current with 500W peak pulse power handling capability.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 54 | V |
| Voltage - Breakdown (Min) | 60 | V |
| Voltage - Clamping (Max) @ Ipp | 87.1 | V |
| Current - Peak Pulse (10/1000µs) | 5.7 | A |
| Power - Peak Pulse | 500 | W |
| Type | Zener | — |
| Bidirectional Channels | 1 | — |
| Mounting Type | Through Hole | — |
| Package / Case | DO-204AC, DO-15, Axial | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the SA54CA is determined by strict equivalence across the following critical parameters:
- Voltage - Reverse Standoff (Typ): 54V
- Voltage - Breakdown (Min): 60V
- Voltage - Clamping (Max) @ Ipp: 87.1V
- Current - Peak Pulse (10/1000µs): 5.7A nominal tolerance
- Power - Peak Pulse: 500W
- Type: Zener, single bidirectional channel
- Mounting Type: Through Hole
- Package / Case: DO-204AC (DO-15) Axial
Substitute parts are categorized as follows:
Direct Equivalents (Identical Electrical Specifications): Parts meeting all electrical parameters within specified tolerances and maintaining active product status.
Similar Equivalents (Acceptable Electrical Variance): Parts with minor variations in peak pulse current (±0.3A) while maintaining all voltage specifications and power rating. These parts are functionally interchangeable in general-purpose applications.
Related Alternatives (Voltage Deviation): Parts with different reverse standoff voltage ratings that do not qualify as direct substitutes but are included for reference.
Parameter Comparison
| Part Number | Manufacturer | Vwm (Typ) V | Vbr (Min) V | Vc (Max) @ Ipp V | Ipp (10/1000µs) A | Ppk W | Package | Product Status | Operating Temp °C |
|---|---|---|---|---|---|---|---|---|---|
| SA54CA | onsemi | 54 | 60 | 87.1 | 5.7 | 500 | DO-15 | Obsolete | — |
| SA54CA-E3/54 | Vishay General Semiconductor | 54 | 60 | 87.1 | 5.7 | 500 | DO-204AC (DO-15) | Active | -55 to 175 |
| SA54CAHE3/54 | Vishay General Semiconductor | 54 | 60 | 87.1 | 5.7 | 500 | DO-204AC (DO-15) | Active | -55 to 175 |
| P5KE54CA-AP | Micro Commercial Co | 54 | 60 | 87.1 | 5.7 | 500 | DO-15 | Active | -65 to 175 |
| P5KE54CA-BP | Micro Commercial Co | 54 | 60 | 87.1 | 5.7 | 500 | DO-15 | Active | -65 to 175 |
| P5KE54CA-TP | Micro Commercial Co | 54 | 60 | 87.1 | 5.7 | 500 | DO-15 | Active | -65 to 175 |
| SA54CA (Taiwan Semiconductor) | Taiwan Semiconductor Corporation | 54 | 60 | 87.1 | 6.0 | 500 | DO-204AC (DO-15) | Active | -55 to 175 |
| SA54CA-AP | Micro Commercial Co | 54 | 60 | 87.1 | 5.9 | 500 | DO-15 | Active | -55 to 175 |
| SA54CA-BP | Micro Commercial Co | 54 | 60 | 87.1 | 5.9 | 500 | DO-15 | Active | -55 to 175 |
| SA54CA-TP | Micro Commercial Co | 54 | 60 | 87.1 | 5.9 | 500 | DO-15 | Active | -55 to 175 |
| SA51CA | Taiwan Semiconductor Corporation | 51 | 56.7 | 82.4 | 6.3 | 500 | DO-204AC (DO-15) | Active | -55 to 175 |
Engineering Selection Recommendations
Primary Substitutes (Direct Electrical Equivalents):
The Vishay SA54CA-E3/54 and SA54CAHE3/54 are direct electrical equivalents with identical voltage and current specifications. Both are active products with ROHS3 compliance. The SA54CAHE3/54 includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. Tape & Reel packaging is standard for both.
The Micro Commercial Co P5KE54CA series (P5KE54CA-AP, P5KE54CA-BP, P5KE54CA-TP) provides direct electrical equivalence with extended operating temperature range (-65°C to 175°C). These parts are available in bulk packaging and maintain identical voltage and power specifications.
Secondary Substitutes (Minor Current Variance):
Taiwan Semiconductor Corporation SA54CA and Micro Commercial Co SA54CA variants (SA54CA-AP, SA54CA-BP, SA54CA-TP) exhibit peak pulse current ratings between 5.9A and 6.0A, representing acceptable variance within typical component tolerance bands. All voltage parameters remain identical to the original SA54CA specification. These parts are active products with ROHS3 compliance.
Non-Equivalent Alternative:
The SA51CA from Taiwan Semiconductor Corporation does not qualify as a substitute due to different voltage specifications (51V standoff, 56.7V breakdown minimum, 82.4V clamping maximum). This part is listed for reference only.
Frequently Asked Questions (FAQ)
Q: Can I use SA54CA-E3/54 as a direct replacement for the obsolete onsemi SA54CA?
A: Yes. The SA54CA-E3/54 from Vishay General Semiconductor maintains identical electrical specifications across all critical parameters: 54V reverse standoff, 60V breakdown minimum, 87.1V clamping maximum, and 5.7A peak pulse current. Both use DO-15 through-hole packaging. The Vishay part is active and ROHS3 compliant.
Q: What is the difference between SA54CAHE3/54 and SA54CA-E3/54?
A: Both parts are electrically identical. The SA54CAHE3/54 includes AEC-Q101 automotive qualification and is suitable for automotive applications requiring enhanced reliability screening. Standard industrial applications can use either part.
Q: Are the Micro Commercial Co P5KE54CA variants fully compatible?
A: Yes. The P5KE54CA-AP, P5KE54CA-BP, and P5KE54CA-TP maintain identical voltage specifications and 5.7A peak pulse current. The primary difference is packaging format (bulk vs. tape & reel) and extended operating temperature range (-65°C to 175°C vs. standard -55°C to 175°C). All are electrically interchangeable.
Q: Why do some substitutes show 5.9A or 6.0A peak pulse current instead of 5.7A?
A: These variations fall within acceptable component tolerance ranges for TVS diodes. The voltage specifications—the primary design parameters—remain identical. Peak pulse current variance of ±0.3A does not affect functional compatibility in general-purpose transient suppression circuits.
Q: Can I use SA51CA as a substitute?
A: No. The SA51CA has different voltage specifications (51V standoff vs. 54V, 82.4V clamping vs. 87.1V). This part is not electrically equivalent and would not provide the same transient suppression characteristics.
Q: What packaging options are available for substitutes?
A: Vishay parts are supplied in Tape & Reel (TR) format. Micro Commercial Co parts are available in bulk packaging. All maintain DO-15 through-hole form factor compatible with the original SA54CA footprint.
Q: Are all substitute parts ROHS3 compliant?
A: Vishay and Taiwan Semiconductor Corporation parts are ROHS3 compliant. Micro Commercial Co parts do not specify RoHS status in the provided data. Verify RoHS compliance requirements with your procurement specifications.
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