S1B-LTP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The S1B-LTP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 100V DC reverse voltage and 1A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent substitute parts is necessary to maintain design continuity, support existing production lines, and ensure component availability for legacy system maintenance and repair applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 1 A
Speed Classification	Standard Recovery >500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	2	µs
Current - Reverse Leakage @ Vr	5	µA @ 100 V
Capacitance @ Vr, F	12	pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the S1B-LTP are identified based on strict parametric equivalence within the general purpose rectifier diode category. The substitution criteria are:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C
Technology: Standard
RoHS Status: ROHS3 Compliant

All substitute parts must match these parameters exactly to ensure direct functional and mechanical compatibility. Deviations in any critical parameter disqualify a part from substitution eligibility.

Parameter Comparison

Parameter	S1B-LTP (Micro Commercial Co)	S1B_R1_00001 (Panjit International Inc.)	Match Status
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	Equivalent
Current - Average Rectified (Io)	1 A	1 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1.1 V @ 1 A	Equivalent
Speed Classification	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Equivalent
Current - Reverse Leakage @ Vr	5 µA @ 100 V	1 µA @ 100 V	Substitute Superior
Capacitance @ Vr, F	12 pF @ 4V, 1MHz	12 pF @ 4V, 1MHz	Equivalent
Package / Case	DO-214AA, SMB	DO-214AA, SMB	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Not For New Designs	Active	Substitute Active

Engineering Selection Recommendations

The S1B_R1_00001 manufactured by Panjit International Inc. is a direct parametric equivalent to the S1B-LTP. All critical electrical and mechanical specifications match exactly, including reverse voltage rating, forward current capacity, forward voltage drop, package configuration, and operating temperature range.

The substitute part offers the additional advantage of Active product status, ensuring continued availability and manufacturing support. Both parts maintain ROHS3 compliance and identical moisture sensitivity classification, confirming suitability for equivalent environmental and regulatory requirements.

The S1B_R1_00001 demonstrates superior reverse leakage current performance (1 µA versus 5 µA at 100V), which represents an improvement over the original specification without introducing any compatibility concerns.

For applications currently using the S1B-LTP, direct substitution with the S1B_R1_00001 is supported by complete parametric alignment and active product status.

Frequently Asked Questions (FAQ)

Q: Can the S1B_R1_00001 be used as a direct replacement for the S1B-LTP in existing designs?

A: Yes. The S1B_R1_00001 matches all critical electrical parameters (100V reverse voltage, 1A average rectified current, 1.1V forward voltage drop) and mechanical specifications (DO-214AA SMB package, surface mount configuration). No circuit modifications are required.

Q: What is the significance of the "Not For New Designs" status on the S1B-LTP?

A: This designation indicates the part has reached end-of-life and is no longer recommended for new product development. The S1B_R1_00001 carries Active status, confirming ongoing manufacturing and supply chain support.

Q: Are there differences in reverse leakage current between these parts?

A: The S1B_R1_00001 specifies 1 µA reverse leakage at 100V, compared to 5 µA for the S1B-LTP. This represents improved performance and does not affect substitution compatibility.

Q: Do both parts share identical package and mounting specifications?

A: Yes. Both parts use the DO-214AA (SMB) surface mount package with identical pin configuration and PCB footprint requirements.

Q: Are compliance certifications equivalent between the two parts?

A: Yes. Both parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity classification, and share identical REACH and ECCN designations.

Q: What inventory considerations apply to these parts?

A: The S1B-LTP has 832 pieces in stock with Not For New Designs status. The S1B_R1_00001 has 1882 pieces in stock with Active product status, providing greater long-term availability assurance.

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