Request Quote
(Ships tomorrow)
SD05-7 Transient Voltage Suppressor Equivalent & Substitute Parts
Part Overview
The SD05-7 is a unidirectional Zener-type transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in SOD-323 surface mount package. This component provides ESD and transient protection with a 5V reverse standoff voltage, 14.5V maximum clamping voltage, and 24A peak pulse current capability (8/20µs). The part carries automotive-grade qualification (AEC-Q101) and is ROHS3 compliant.
The SD05-7 is designated as Last Time Buy, indicating end-of-life status. Equivalent and substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production and field service applications.
Substiute Parts
Key Parameters
| Parameter | SD05-7 Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 5V | V |
| Voltage - Breakdown (Min) | 6.2V | V |
| Voltage - Clamping (Max) @ Ipp | 14.5V | V |
| Current - Peak Pulse (8/20µs) | 24A | A |
| Power - Peak Pulse | 350W | W |
| Capacitance @ 1MHz | 350pF | pF |
| Operating Temperature Range | -55°C to 150°C | °C |
| Package / Case | SOD-323 | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
Substitute Part Grouping Explanation
Substitution eligibility for the SD05-7 is determined by the following critical parameters:
- Reverse Standoff Voltage (Typ): 5V nominal
- Breakdown Voltage (Min): 6.0V to 6.4V range
- Clamping Voltage (Max) @ Ipp: 9.8V to 20V range (device-dependent)
- Peak Pulse Current (8/20µs): 1A to 47A range
- Package Type: SOD-323 surface mount
- Unidirectional Configuration: Single channel Zener TVS
- Compliance: ROHS3, AEC-Q101 (automotive grade preferred)
Substitute parts are grouped into three categories based on electrical performance alignment:
Category A - Direct Electrical Equivalents (Clamping voltage 13V–14.5V, peak current 24A–40A): SD05A-7, SD05.TCT. These parts maintain the primary protection characteristics of the SD05-7 with minimal circuit impact.
Category B - Lower Clamping Voltage Alternatives (Clamping voltage 9.8V–12V, peak current 1A–4.6A): SD05T1G, PESD5V0L1UA,115, PJSD05W_R1_00001. These parts provide tighter voltage regulation but reduced current handling capacity.
Category C - Higher Clamping Voltage Alternatives (Clamping voltage 18.3V–20V, peak current 15A–47A): CDSOD323-T05, CDSOD323-T05L, ESDA8V2-1J, PESD5V0S1UA,115. These parts offer increased transient energy absorption but higher clamping thresholds.
Parameter Comparison
| Part Number | Manufacturer | Standoff (V) | Breakdown Min (V) | Clamp Max (V) | Peak Current (A) | Power (W) | Capacitance (pF) | Temp Range (°C) | Status |
|---|---|---|---|---|---|---|---|---|---|
| SD05-7 | Diodes Inc. | 5 | 6.2 | 14.5 | 24 | 350 | 350 | -55 to 150 | Last Time Buy |
| SD05A-7 | Diodes Inc. | 5.5 | 6.2 | 13 | 40 | 520 | 350 | -65 to 150 | Active |
| SD05.TCT | Semtech | 5 | 6 | 14.5 | 24 | 350 | 350 | -55 to 125 | Active |
| SD05T1G | onsemi | 5 | 6.2 | 9.8 | 24 | 350 | 350 | -55 to 150 | Active |
| CDSOD323-T05 | Bourns Inc. | 5 | 6 | 18.3 | 17 | 350 | 3 | -55 to 150 | Active |
| CDSOD323-T05L | Bourns Inc. | 5 | 6 | 18.3 | 15 | 350 | 1 | -55 to 150 | Active |
| ESDA8V2-1J | STMicroelectronics | 5 | 8.2 | 20 | 25 | 500 | 210 | -40 to 125 | Active |
| PESD5V0L1UA,115 | Nexperia USA Inc. | 5 | 6.4 | 12 | 4.6 | 42 | 25 | -55 to 150 | Active |
| PESD5V0S1UA,115 | Nexperia USA Inc. | 5 | 6.2 | 19 | 47 | 890 | 480 | -55 to 150 | Active |
| PESD5V0U1UA,115 | Nexperia USA Inc. | 5 | 5.8 | — | — | — | 2 | -55 to 150 | Active |
| PJSD05W_R1_00001 | Panjit International Inc. | 5 | 6 | 9.8 | 1 | 350 | 300 | -50 to 150 | Active |
Engineering Selection Recommendations
Primary Recommendation: SD05A-7 (Diodes Incorporated)
SD05A-7 is the manufacturer-recommended direct successor to SD05-7. Both are produced by Diodes Incorporated, ensuring design continuity and supply chain stability. SD05A-7 offers improved specifications with 40A peak current (versus 24A) and 520W peak power (versus 350W), providing enhanced transient protection margin. Operating temperature range extends to -65°C. Product status is Active with established supply. Automotive-grade qualification and ROHS3 compliance are maintained.
Secondary Recommendation: SD05.TCT (Semtech Corporation)
SD05.TCT provides electrical equivalence with identical clamping voltage (14.5V) and peak current (24A) to the SD05-7. Semtech is an established TVS manufacturer with automotive-qualified products. Operating temperature range is -55°C to 125°C (5°C lower maximum than SD05-7). Product status is Active. ROHS3 compliant. Suitable for applications where thermal headroom above 125°C is not required.
Alternative for High-Current Applications: PESD5V0S1UA,115 (Nexperia USA Inc.)
PESD5V0S1UA,115 delivers 47A peak current and 890W peak power, providing significant transient energy absorption capability. Clamping voltage is 19V (higher than SD05-7). Automotive-grade qualification and AEC-Q101 certification are present. Operating temperature range is -55°C to 150°C. Suitable for applications requiring enhanced ESD protection or higher transient stress environments.
Alternative for Space-Constrained or Low-Current Applications: PESD5V0L1UA,115 (Nexperia USA Inc.)
PESD5V0L1UA,115 offers reduced capacitance (25pF versus 350pF), beneficial for high-speed signal integrity applications. Clamping voltage is 12V with 4.6A peak current. Automotive-grade qualification and AEC-Q101 certification are present. Operating temperature range is -55°C to 150°C. Suitable for precision analog or high-frequency circuits where parasitic capacitance must be minimized.
Frequently Asked Questions (FAQ)
Q: Can SD05A-7 be used as a direct drop-in replacement for SD05-7?
A: Yes. Both parts share identical SOD-323 package geometry, single-channel unidirectional Zener configuration, and 5V nominal standoff voltage. SD05A-7 provides superior performance with higher peak current (40A versus 24A) and power rating (520W versus 350W). No circuit redesign is required.
Q: What is the difference between clamping voltage and standoff voltage?
A: Standoff voltage (5V) is the maximum voltage the TVS allows across its terminals during normal operation without conducting. Clamping voltage (14.5V for SD05-7) is the maximum voltage that appears across the TVS during a transient event at specified peak current. Lower clamping voltage provides tighter protection but may limit current handling.
Q: Why do some substitute parts have higher clamping voltages (18.3V–20V)?
A: Higher clamping voltage indicates the TVS conducts at a higher threshold during transient events. These parts (CDSOD323-T05, ESDA8V2-1J, PESD5V0S1UA,115) are suitable for applications where circuit components tolerate higher transient peaks or where lower standoff voltage regulation is acceptable. Selection depends on downstream component voltage ratings.
Q: Is PESD5V0U1UA,115 a suitable substitute?
A: PESD5V0U1UA,115 has incomplete electrical specifications in available data (clamping voltage, peak current, and power ratings are not provided). This part cannot be reliably evaluated for substitution without complete parametric information. Use only if full datasheet specifications confirm compatibility with circuit requirements.
Q: What is the significance of AEC-Q101 qualification?
A: AEC-Q101 is the automotive industry standard qualification for discrete semiconductors. Parts carrying this certification (SD05-7, SD05A-7, PESD5V0L1UA,115, PESD5V0S1UA,115, PESD5V0U1UA,115) meet stringent reliability, temperature cycling, and stress testing requirements. Automotive-grade parts are preferred for mission-critical applications.
Q: Can parts with different peak current ratings be interchanged?
A: Peak current rating determines the maximum transient energy the TVS can safely dissipate. Parts with lower peak current (PESD5V0L1UA,115 at 4.6A, PJSD05W_R1_00001 at 1A) are suitable only for low-energy transient environments. Parts with higher peak current (PESD5V0S1UA,115 at 47A) provide additional margin for high-stress applications. Selection must match the actual transient current expected in the circuit.
Q: What role does capacitance play in TVS selection?
A: TVS capacitance affects high-frequency signal integrity. Lower capacitance (CDSOD323-T05L at 1pF, PESD5V0U1UA,115 at 2pF) minimizes signal distortion in high-speed circuits. Higher capacitance (PESD5V0S1UA,115 at 480pF) has minimal impact on low-frequency or DC applications. For precision analog or RF circuits, low-capacitance alternatives should be prioritized.
Q: Are there packaging differences between substitute parts?
A: All listed substitute parts use SOD-323 surface mount package, ensuring mechanical compatibility with SD05-7 PCB layouts. Packaging variants (Cut Tape vs. Tape & Reel) affect supply and handling but do not impact electrical performance or board-level integration.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts