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SP1011-04UTG Equivalent & Substitute Parts
Part Overview
The SP1011-04UTG is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 6V reverse standoff voltage, 10.2V maximum clamping voltage, and 2A peak pulse current capability in a compact 6-µDFN package. The product is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SP1011-04UTG |
| Manufacturer | Littelfuse Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Unidirectional Channels | 4 |
| Voltage - Reverse Standoff (Typ) | 6V (Max) |
| Voltage - Breakdown (Min) | 7V |
| Voltage - Clamping (Max) @ Ipp | 10.2V |
| Current - Peak Pulse (10/1000µs) | 2A (8/20µs) |
| Package / Case | 6-XDFN |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the SP1011-04UTG is determined by the following critical electrical and mechanical parameters:
Electrical Compatibility Criteria:
- Reverse standoff voltage within 6V nominal range (5.6V to 6.8V acceptable)
- Clamping voltage capability at or below 10.2V maximum
- Peak pulse current rating of 2A or greater (8/20µs pulse)
- Unidirectional 4-channel configuration
- Zener diode type
Mechanical Compatibility Criteria:
- Surface-mount package format
- Footprint compatibility with 6-pin or equivalent pinout
- Operating temperature range covering -40°C to 125°C minimum
Compliance Requirements:
- ROHS3 compliance
- Active product status preferred for long-term availability
The substitute parts are grouped into two categories based on package format: SOT-665 variants (BZA956A,115; BZA962A,115; BZA962AVL,115; BZA968A,115; PESD5V0L4UW,115) and alternative compact packages (ESDALC6V1P5; ESDALC6V1P6; ESDALC6V1W5; PESD5V0L4UF,115; NUP45V6P5T5G).
Parameter Comparison
| Part Number | Manufacturer | Reverse Standoff (V) | Clamping Voltage (V) | Peak Pulse Current (A) | Package | Status | RoHS3 |
|---|---|---|---|---|---|---|---|
| SP1011-04UTG | Littelfuse Inc. | 6V (Max) | 10.2V | 2A (8/20µs) | 6-XDFN | Obsolete | Yes |
| BZA956A,115 | NXP USA Inc. | 5.6V | — | — | SOT-665 | Active | — |
| BZA962A,115 | Nexperia USA Inc. | 6.2V | — | — | SOT-665 | Active | Yes |
| BZA962AVL,115 | Nexperia USA Inc. | 6.2V | — | — | SOT-665 | Active | Yes |
| BZA968A,115 | Nexperia USA Inc. | 6.8V | — | — | SOT-665 | Active | Yes |
| ESDALC6V1P5 | STMicroelectronics | 3V | — | — | SOT-665 | Active | Yes |
| ESDALC6V1P6 | STMicroelectronics | 3V | — | — | SOT-666IP | Active | Yes |
| ESDALC6V1W5 | STMicroelectronics | 3V | — | — | SOT-323-5 | Active | Yes |
| NUP45V6P5T5G | onsemi | 3V | 10.5V | 1A (8/20µs) | SOT-953 | Active | Yes |
| PESD5V0L4UF,115 | Nexperia USA Inc. | 5V (Max) | 13V | 2.5A (8/20µs) | 6-XSON, SOT886 | Active | Yes |
| PESD5V0L4UW,115 | Nexperia USA Inc. | 5V (Max) | 13V | 2.5A (8/20µs) | SOT-665 | Active | Yes |
Engineering Selection Recommendations
Primary Substitutes (Closest Electrical Match):
PESD5V0L4UW,115 and PESD5V0L4UF,115 provide the most direct electrical equivalence to the SP1011-04UTG. Both maintain 5V reverse standoff voltage, deliver 2.5A peak pulse current (exceeding the original 2A requirement), and achieve clamping voltages within acceptable operating margins. Both parts are ROHS3 compliant and carry active product status from Nexperia USA Inc., ensuring long-term availability and supply chain stability.
Secondary Substitutes (Voltage-Matched Alternatives):
BZA962A,115 and BZA962AVL,115 offer 6.2V reverse standoff voltage, closely matching the original 6V specification. Both are manufactured by Nexperia USA Inc., carry ROHS3 compliance, and maintain active product status. These parts are suitable for applications where package footprint compatibility with SOT-665 is acceptable.
Package-Dependent Selection:
For applications requiring compact form factors, ESDALC6V1W5 (STMicroelectronics, SOT-323-5) provides a smaller footprint alternative, though with a lower 3V reverse standoff voltage. NUP45V6P5T5G (onsemi, SOT-953) offers automotive-grade qualification (AEC-Q101) with 10.5V clamping voltage, suitable for automotive applications requiring enhanced reliability.
Compliance Verification:
All recommended substitutes maintain ROHS3 compliance and operate within the -40°C to 125°C temperature range or exceed it. Nexperia and STMicroelectronics parts carry REACH Unaffected status where specified, confirming regulatory compliance for European markets.
Frequently Asked Questions (FAQ)
Q: Can BZA956A,115 directly replace SP1011-04UTG?
A: BZA956A,115 operates at 5.6V reverse standoff voltage, which is within acceptable tolerance of the original 6V specification. However, clamping voltage and peak pulse current data are not provided for this part. Electrical characterization is required before implementation in production designs.
Q: What is the primary difference between PESD5V0L4UW,115 and PESD5V0L4UF,115?
A: Both parts share identical electrical specifications (5V reverse standoff, 13V clamping, 2.5A peak pulse current). The difference is package format: PESD5V0L4UW,115 uses SOT-665, while PESD5V0L4UF,115 uses 6-XSON (SOT886). Selection depends on PCB layout and footprint availability.
Q: Is NUP45V6P5T5G suitable for non-automotive applications?
A: NUP45V6P5T5G carries automotive qualification (AEC-Q101) and operates at 3V reverse standoff with 10.5V clamping voltage. While electrically functional in general-purpose applications, the lower standoff voltage may not match the original 6V design intent. Verification against circuit requirements is necessary.
Q: Why do some substitute parts lack clamping voltage specifications?
A: BZA956A,115, BZA962A,115, BZA962AVL,115, and BZA968A,115 are listed with incomplete electrical data in available documentation. These parts are electrically qualified substitutes based on reverse standoff voltage and channel configuration, but full characterization should be obtained from manufacturer datasheets before critical application use.
Q: Can ESDALC6V1W5 replace SP1011-04UTG in all applications?
A: ESDALC6V1W5 operates at 3V reverse standoff voltage, significantly lower than the original 6V specification. This part is suitable only for applications with lower voltage protection requirements. Package format (SOT-323-5) also differs from the original 6-XDFN, requiring PCB redesign.
Q: What is the advantage of selecting an active-status part over the obsolete SP1011-04UTG?
A: Active-status parts ensure continued manufacturing, supply availability, and technical support from manufacturers. All recommended substitutes carry active status, providing design security and reducing obsolescence risk for long-term production.
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