1SS181-TP Equivalent & Substitute Parts

Part Overview

The 1SS181-TP is a general-purpose diode array manufactured by Micro Commercial Co, configured as a 1 Pair Common Anode device in SOT-23 surface mount packaging. This component is rated for 80 V DC reverse voltage with 100 mA average rectified current per diode and features a maximum forward voltage of 1.2 V at 100 mA. The 1SS181-TP is classified as Not For New Designs, indicating it has reached end-of-life status. Identifying equivalent substitute parts is necessary for applications requiring continued supply, design updates, or inventory management where active production alternatives are preferred.

Substiute Parts

1SS181-TP

Micro Commercial CoIn Stock: 28671SS181-TP Datasheet

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MMBD2836LT1G

onsemiIn Stock: 440265MMBD2836LT1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1SS181-TP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Diode Configuration: 1 Pair Common Anode
• Package / Case: TO-236-3, SC-59, SOT-23-3 (SOT-23 surface mount)
• Mounting Type: Surface Mount
• Current - Average Rectified (Io): 100 mA (DC) per diode
• Voltage - Forward (Vf) (Max) @ If: 1.2 V @ 100 mA
• Reverse Recovery Time (trr): 4 ns
• RoHS Compliance: ROHS3 Compliant

Allowable Variation Parameters:

• Voltage - DC Reverse (Vr) (Max): Substitute must equal or exceed 80 V
• Operating Temperature - Junction: Substitute must support the application's thermal requirements
• Current - Reverse Leakage @ Vr: Substitute specifications must be compatible with circuit design

The MMBD2836LT1G meets all mandatory matching criteria and allowable variation parameters, qualifying it as a direct substitute for the 1SS181-TP.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MMBD2836LT1G (onsemi)

The MMBD2836LT1G is the qualified substitute for the 1SS181-TP based on the following engineering factors:

1. Functional Equivalence: Both devices share identical diode configuration (1 Pair Common Anode), current rating (100 mA DC per diode), forward voltage characteristics (1.2 V @ 100 mA), and reverse recovery time (4 ns).

2. Package Compatibility: Both components utilize the TO-236-3 / SOT-23-3 surface mount package, ensuring direct PCB footprint compatibility without layout modifications.

3. Compliance Status: The MMBD2836LT1G maintains ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original part.

4. Production Status: The MMBD2836LT1G is classified as Active, providing assured long-term availability and supply chain stability compared to the 1SS181-TP's Not For New Designs status.

5. Voltage Rating Consideration: The MMBD2836LT1G is rated for 75 V maximum DC reverse voltage, which is 5 V lower than the 1SS181-TP's 80 V rating. This substitute is suitable for applications operating at or below 75 V. Applications requiring the full 80 V rating must verify that circuit peak voltages remain within the 75 V specification.

6. Temperature Performance: The MMBD2836LT1G supports an operating junction temperature range of −55°C to 150°C, exceeding the 1SS181-TP's maximum of 125°C and providing enhanced thermal margin for demanding environments.

Frequently Asked Questions (FAQ)

Q: Can the MMBD2836LT1G directly replace the 1SS181-TP without PCB modifications?

A: Yes. Both devices are packaged in TO-236-3 / SOT-23-3 surface mount configuration with identical pin assignments for the 1 Pair Common Anode configuration. No PCB layout changes are required.

Q: What is the significance of the 5 V difference in maximum reverse voltage rating (80 V vs. 75 V)?

A: The MMBD2836LT1G's 75 V maximum rating is suitable for applications where peak reverse voltages do not exceed 75 V. If your circuit design requires operation at voltages between 75 V and 80 V, the MMBD2836LT1G is not appropriate. Verify your application's maximum reverse voltage specification before substitution.

Q: Are the forward voltage and current characteristics identical between these parts?

A: Yes. Both the 1SS181-TP and MMBD2836LT1G are specified at 1.2 V maximum forward voltage at 100 mA, and both are rated for 100 mA average rectified current per diode. Forward biased circuit behavior is equivalent.

Q: Why is the MMBD2836LT1G preferred despite the lower voltage rating?

A: The MMBD2836LT1G is in active production status, ensuring continued availability and supply chain reliability. The 1SS181-TP is classified as Not For New Designs, indicating end-of-life status. For new designs or long-term production, the MMBD2836LT1G is the recommended choice provided your application's voltage requirements are satisfied.

Q: How do the reverse leakage current specifications compare?

A: The 1SS181-TP specifies 500 nA maximum reverse leakage at 80 V, while the MMBD2836LT1G specifies 100 nA maximum at 50 V. The MMBD2836LT1G exhibits lower leakage at its reference voltage. Direct comparison at identical voltage conditions is not provided in the specifications; however, the lower leakage characteristic of the MMBD2836LT1G is generally favorable for low-power applications.

Q: Is the wider operating temperature range of the MMBD2836LT1G (−55°C to 150°C) a significant advantage?

A: The extended temperature range provides design flexibility for applications operating in extreme thermal environments. If your application operates within the 1SS181-TP's maximum junction temperature of 125°C, both parts are functionally equivalent in this regard. The MMBD2836LT1G offers additional margin for high-temperature or low-temperature operation.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both the 1SS181-TP and MMBD2836LT1G are ROHS3 compliant and REACH unaffected, meeting identical regulatory requirements for commercial and industrial applications.