1N4148WLP-TP Equivalent & Substitute Parts

Part Overview

The 1N4148WLP-TP is a general-purpose small-signal diode manufactured by Micro Commercial Co, rated for 80 V DC reverse voltage and 100 mA average rectified current in a surface-mount SOD-882 package. This part is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. Substitute parts must maintain electrical performance within the specified voltage, current, and thermal operating ranges while accommodating package and form-factor constraints.

Substiute Parts

1N4148WLP-TP

Micro Commercial CoIn Stock: 244581N4148WLP-TP Datasheet

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1N4148WL2-TP

Micro Commercial CoIn Stock: 79531N4148WL2-TP Datasheet

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1SS361LPH4-7B

Diodes IncorporatedIn Stock: 182191SS361LPH4-7B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N4148WLP-TP is determined by the following electrical and mechanical criteria:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 80 V
• Current - Average Rectified (Io): Must equal or exceed 100 mA
• Voltage - Forward (Vf) (Max) @ If: Must not exceed 1.2 V @ 100 mA
• Reverse Recovery Time (trr): Must equal 4 ns
• Speed Classification: Small Signal ≤ 200mA (Io), Any Speed
• Mounting Type: Surface Mount
• Operating Temperature Range: Must encompass -65°C to 150°C junction temperature
• RoHS and Compliance Status: ROHS3 Compliant

Secondary Considerations:

• Package form factor compatibility with circuit board layout
• Reverse leakage current characteristics
• Capacitance specifications where applicable

The identified substitute parts meet or exceed the electrical performance requirements of the main part while maintaining compliance certifications and surface-mount assembly compatibility.

Parameter Comparison

Engineering Selection Recommendations

1N4148WL2-TP (Micro Commercial Co)

This part is an active product with enhanced electrical specifications. It provides 100 V reverse voltage rating (20 V higher than the main part) and 150 mA current capacity (50 mA higher than the main part). Forward voltage is 1.25 V @ 100 mA, within acceptable tolerance of the original 1.2 V specification. The part maintains identical reverse recovery time of 4 ns and operating temperature range of -65°C to 150°C. ROHS3 compliance and MSL 1 rating are equivalent. Package form factor changes from SOD-882 to 0402 (1006 Metric), requiring circuit board layout modification. Reverse leakage current increases to 5 µA @ 75 V, which is higher than the original specification.

1SS361LPH4-7B (Diodes Incorporated)

This part is an active product with electrical specifications closely matching the main part. It maintains 80 V reverse voltage rating and 100 mA current capacity identical to the original. Forward voltage is 1.2 V @ 100 mA, matching the main part exactly. Reverse recovery time remains 4 ns. Operating temperature range is -55°C to 150°C, which is 10°C narrower at the lower bound than the original -65°C specification. ROHS3 compliance and MSL 1 rating are equivalent. Package form factor changes from SOD-882 to 0402 (1006 Metric), requiring circuit board layout modification. Reverse leakage current is 500 nA @ 80 V, higher than the original 100 nA specification.

Both substitute parts are active products with full compliance certifications. Selection between them depends on application requirements for voltage margin, current capacity, and temperature range at the lower operating limit.

Frequently Asked Questions (FAQ)

Q: Can the 1N4148WL2-TP directly replace the 1N4148WLP-TP without circuit modification?

A: Electrical substitution is possible. The 1N4148WL2-TP meets or exceeds all electrical performance requirements. However, package form factor differs (0402 1006 Metric versus SOD-882), requiring printed circuit board layout changes and potential assembly process adjustments.

Q: What is the significance of the higher reverse leakage current in the substitute parts?

A: The 1N4148WL2-TP exhibits 5 µA @ 75 V reverse leakage, and the 1SS361LPH4-7B exhibits 500 nA @ 80 V, compared to 100 nA @ 80 V in the original part. Applications sensitive to leakage current in high-impedance circuits may require circuit design evaluation. The 1SS361LPH4-7B leakage is closer to the original specification.

Q: Does the 1SS361LPH4-7B operating temperature range of -55°C to 150°C affect substitution suitability?

A: The lower temperature limit of -55°C is 10°C higher than the original -65°C specification. Applications requiring operation below -55°C junction temperature cannot use this part. The 1N4148WL2-TP maintains the full -65°C to 150°C range.

Q: Are both substitute parts available in the same packaging format as the original?

A: No. Both substitute parts use 0402 (1006 Metric) package format, while the original 1N4148WLP-TP uses SOD-882 package. Circuit board redesign is required for either substitution.

Q: What compliance certifications apply to all three parts?

A: All three parts are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level). ECCN classification is EAR99 for all parts, and HTSUS code is 8541.10.0070.

Q: Which substitute part provides the closest electrical match to the original?

A: The 1SS361LPH4-7B provides the closest electrical match, with identical 80 V reverse voltage, 100 mA current rating, and 1.2 V forward voltage @ 100 mA. The primary difference is the -55°C lower temperature limit versus -65°C in the original part.