S1M-TP Equivalent & Substitute Parts

Part Overview

The S1M-TP is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AA (SMB) package. Manufactured by Micro Commercial Co, this component is discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Reverse Recovery Time (trr)	2 µs
Current - Reverse Leakage @ Vr	5 µA @ 1000 V
Capacitance @ Vr, F	12 pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the S1M-TP are grouped based on electrical and mechanical compatibility within the rectifier diode category. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 1000 V minimum
Current - Average Rectified (Io): 1 A minimum
Package / Case: DO-214AA, SMB (surface mount)
Mounting Type: Surface Mount
Technology: Standard recovery rectifier

Substitution Categories:

Direct Equivalent (S1M-LTP): Identical electrical specifications and base product number (S1M) with active product status and tape & reel packaging.

Similar Equivalent (S1MB-13-F): Matches all critical electrical parameters (1000 V, 1 A, DO-214AA SMB) with active product status and extended temperature range (-65°C to 150°C). Reverse recovery time differs slightly (3 µs vs. 2 µs) and capacitance is 10 pF instead of 12 pF.

Parametric Equivalent (S1M_R1_00001): Meets all critical electrical specifications with identical base product number (S1M), active status, and improved reverse leakage performance (1 µA vs. 5 µA @ 1000 V).

Higher Current Rating (CGRB207-G): Comchip Technology part with 2 A current rating (exceeds 1 A requirement) and identical 1000 V voltage rating in DO-214AA SMB package. Suitable for applications requiring higher current capacity within the same voltage class.

Parameter Comparison

Parameter	S1M-TP	S1M-LTP	S1MB-13-F	S1M_R1_00001	CGRB207-G
Manufacturer	Micro Commercial Co	Micro Commercial Co	Diodes Incorporated	Panjit International Inc.	Comchip Technology
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	1000 V	1000 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 2 A
Reverse Recovery Time (trr)	2 µs	2 µs	3 µs	Not specified	Not specified
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	5 µA @ 1000 V	5 µA @ 1000 V	1 µA @ 1000 V	5 µA @ 1000 V
Capacitance @ Vr, F	12 pF @ 4V, 1MHz	12 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz	12 pF @ 4V, 1MHz	Not specified
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	150°C (Max)
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: S1M-LTP

The S1M-LTP is the recommended direct substitute for the S1M-TP. Both parts share identical electrical specifications, the same base product number (S1M), and equivalent compliance certifications (ROHS3, REACH Unaffected). The S1M-LTP maintains active product status with higher inventory availability (2100 pcs vs. 1139 pcs). Packaging differs only in format (tape & reel vs. unspecified), which does not affect electrical performance.

Secondary Substitute: S1MB-13-F

The S1MB-13-F from Diodes Incorporated is suitable for applications where extended low-temperature operation is required (-65°C minimum vs. -55°C). All critical electrical parameters match the S1M-TP specification. The reverse recovery time is slightly longer (3 µs vs. 2 µs), and capacitance is marginally lower (10 pF vs. 12 pF), which may be acceptable in most general-purpose rectification applications. This part has the highest inventory availability (30200 pcs).

Tertiary Substitute: S1M_R1_00001

The S1M_R1_00001 from Panjit International Inc. provides improved reverse leakage performance (1 µA vs. 5 µA @ 1000 V), which may benefit applications sensitive to leakage current. All other electrical parameters are equivalent to the S1M-TP. This part maintains active status with substantial inventory (6237 pcs).

Higher Current Alternative: CGRB207-G

The CGRB207-G from Comchip Technology is suitable only for applications where the 1 A current rating is insufficient. This part provides 2 A average rectified current while maintaining the 1000 V voltage rating and DO-214AA SMB package. Use this substitute only when higher current capacity is required by the circuit design.

Frequently Asked Questions (FAQ)

Q: Can S1M-LTP be used as a direct replacement for S1M-TP?

A: Yes. The S1M-LTP is electrically and mechanically equivalent to the S1M-TP. Both parts have identical voltage (1000 V), current (1 A), forward voltage drop (1.1 V @ 1 A), reverse recovery time (2 µs), reverse leakage (5 µA @ 1000 V), and capacitance (12 pF @ 4V, 1MHz) specifications. The S1M-LTP is currently in active production status.

Q: What is the difference between S1MB-13-F and S1M-TP?

A: The S1MB-13-F matches all critical electrical specifications of the S1M-TP (1000 V, 1 A, 1.1 V forward drop, 5 µA reverse leakage). Minor differences include reverse recovery time (3 µs vs. 2 µs) and capacitance (10 pF vs. 12 pF). The S1MB-13-F also supports a lower minimum operating temperature (-65°C vs. -55°C). These differences are typically acceptable in general-purpose rectification circuits.

Q: When should CGRB207-G be used instead of S1M-TP?

A: The CGRB207-G should be selected only when the circuit requires higher average rectified current capacity. This part is rated for 2 A compared to the 1 A rating of the S1M-TP. Both parts maintain the same 1000 V voltage rating and DO-214AA SMB package. If the circuit design specifies 1 A or less, the CGRB207-G is not necessary and may introduce unnecessary cost.

Q: Are all substitute parts available in the same DO-214AA SMB package?

A: Yes. All substitute parts listed (S1M-LTP, S1MB-13-F, S1M_R1_00001, and CGRB207-G) are packaged in the DO-214AA (SMB) surface mount package. This ensures mechanical and thermal compatibility with existing PCB layouts and assembly processes.

Q: Do all substitute parts meet RoHS and REACH compliance?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the S1M-TP. All parts carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the difference between S1M_R1_00001 and S1M-TP?

A: The S1M_R1_00001 is electrically equivalent to the S1M-TP with one notable improvement: reverse leakage current is reduced to 1 µA @ 1000 V compared to 5 µA @ 1000 V in the S1M-TP. This lower leakage may benefit applications where leakage current must be minimized. All other parameters, including voltage, current, forward drop, and capacitance, are identical.

Q: Can these parts be used interchangeably in existing designs?

A: S1M-LTP, S1MB-13-F, and S1M_R1_00001 can be used interchangeably in designs specified for 1000 V, 1 A general-purpose rectification. The CGRB207-G can be used in place of the S1M-TP only if the circuit can tolerate the higher 2 A current rating. Verify that the specific application does not depend on the exact reverse recovery time or capacitance values before substitution.

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