S1M-JR2 Equivalent & Substitute Parts

Part Overview

The S1M-JR2 is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. Manufactured by Taiwan Semiconductor Corporation, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for ongoing design support, production continuity, and long-term component availability.

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)	1.5 µs
Current - Reverse Leakage @ Vr	1 µA @ 1000 V
Capacitance @ Vr, F	12 pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 175°C
Technology	Standard
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the S1M-JR2 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

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): 1.5 µs
Operating Temperature - Junction: -55°C ~ 175°C

Mechanical Parameters:

Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical electrical ratings and mechanical compatibility. Reverse leakage current specifications may vary within acceptable ranges for general-purpose rectifier applications. Parts are grouped by manufacturer and product status to facilitate selection based on availability and design phase requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max)	Io	Vf (Max) @ If	trr	Ir @ Vr	Package	Inventory (Pcs)
S1M-JR2	Taiwan Semiconductor Corporation	Obsolete	1000 V	1 A	1.1 V @ 1 A	1.5 µs	1 µA @ 1000 V	DO-214AC, SMA	915
S1M-KR2G	Taiwan Semiconductor Corporation	Active	1000 V	1 A	1.1 V @ 1 A	1.5 µs	1 µA @ 1000 V	DO-214AC, SMA	725
S1M-26R2	Taiwan Semiconductor Corporation	Active	1000 V	1 A	1.1 V @ 1 A	1.5 µs	1 µA @ 1000 V	DO-214AC, SMA	742
S1M-26R2G	Taiwan Semiconductor Corporation	Active	1000 V	1 A	1.1 V @ 1 A	1.5 µs	1 µA @ 1000 V	DO-214AC, SMA	972
S1M-26R3	Taiwan Semiconductor Corporation	Active	1000 V	1 A	1.1 V @ 1 A	1.5 µs	1 µA @ 1000 V	DO-214AC, SMA	1036
S1M-26R3G	Taiwan Semiconductor Corporation	Active	1000 V	1 A	1.1 V @ 1 A	1.5 µs	1 µA @ 1000 V	DO-214AC, SMA	953
S1M-KR3G	Taiwan Semiconductor Corporation	Active	1000 V	1 A	1.1 V @ 1 A	1.5 µs	1 µA @ 1000 V	DO-214AC, SMA	1015
S1MR2	Taiwan Semiconductor Corporation	Active	1000 V	1 A	1.1 V @ 1 A	1.5 µs	1 µA @ 1000 V	DO-214AC, SMA	7800
S1MR3	Taiwan Semiconductor Corporation	Active	1000 V	1 A	1.1 V @ 1 A	1.5 µs	1 µA @ 1000 V	DO-214AC, SMA	934
MRA4007T3G	onsemi	Not For New Designs	1000 V	1 A	1.1 V @ 1 A	Not Specified	10 µA @ 1000 V	DO-214AC, SMA	425100

Engineering Selection Recommendations

For Active Production and New Designs:

Taiwan Semiconductor Corporation parts with Active product status are the primary selection for new designs and ongoing production. Among the active Taiwan Semiconductor Corporation alternatives, S1MR2 and S1MR3 offer the highest inventory levels (7800 and 934 units respectively), providing superior supply chain continuity. S1M-26R3 and S1M-26R3G also maintain substantial inventory (1036 and 953 units) with confirmed Active status.

For Design Continuation and Legacy Support:

When S1M-JR2 replacement is required for existing designs, any Taiwan Semiconductor Corporation part listed with Active status provides direct electrical and mechanical compatibility. All listed Taiwan Semiconductor Corporation alternatives maintain identical electrical specifications and DO-214AC package compatibility.

Alternative Cross-Manufacturer Option:

MRA4007T3G (onsemi) is electrically equivalent with identical voltage and current ratings. However, this part carries "Not For New Designs" status and exhibits higher reverse leakage current (10 µA versus 1 µA). MRA4007T3G is suitable only for legacy system support where design changes are not feasible. The significantly higher inventory (425,100 units) reflects its historical use but does not override its design status classification.

Compliance Considerations:

All recommended Taiwan Semiconductor Corporation substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original S1M-JR2 specifications. No compliance trade-offs are introduced through substitution.

Frequently Asked Questions (FAQ)

Q: Can S1M-JR2 be directly replaced with S1MR2 or S1MR3?

A: Yes. S1MR2 and S1MR3 are direct electrical and mechanical equivalents. Both maintain identical voltage ratings (1000 V), current ratings (1 A), forward voltage (1.1 V @ 1 A), reverse recovery time (1.5 µs), and package configuration (DO-214AC, SMA). No circuit modifications are required.

Q: What is the difference between the various Taiwan Semiconductor Corporation part numbers (S1M-KR2G, S1M-26R2, S1M-26R3, etc.)?

A: All listed Taiwan Semiconductor Corporation parts are parametrically equivalent with identical electrical and mechanical specifications. Differences exist only in internal product line designations and manufacturing batches. Selection among these parts should be based on inventory availability and supplier allocation.

Q: Why is MRA4007T3G listed as a substitute if it has "Not For New Designs" status?

A: MRA4007T3G is included because it maintains electrical equivalence (1000 V, 1 A, 1.1 V forward voltage, DO-214AC package). Its "Not For New Designs" status indicates it should not be selected for new product development. It is listed for reference in legacy system support scenarios where design changes are not feasible and existing MRA4007T3G inventory must be utilized.

Q: Does the reverse leakage current difference between Taiwan Semiconductor Corporation parts (1 µA) and MRA4007T3G (10 µA) affect circuit performance?

A: Reverse leakage current is specified at maximum rated voltage (1000 V). For general-purpose rectifier applications operating at typical voltage levels below maximum rating, this difference has negligible impact on circuit performance. However, for precision analog circuits or high-impedance applications operating near maximum voltage, the lower leakage of Taiwan Semiconductor Corporation parts is preferable.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts use DO-214AC (SMA) surface mount packaging. No PCB layout modifications or reflow profile adjustments are required when substituting between listed parts.

Q: Which substitute part should be selected for maximum supply chain security?

A: S1MR2 provides the highest inventory level (7800 units) among active Taiwan Semiconductor Corporation alternatives, followed by S1M-26R3 (1036 units) and S1M-26R3G (953 units). For applications requiring extended production runs or long-term component availability, S1MR2 is the optimal selection.

Q: Is the S1M-JR2 still available for purchase?

A: S1M-JR2 is classified as Obsolete. Current inventory is limited to 915 units. For new production commitments or designs requiring component longevity beyond current stock levels, transition to an Active status substitute part is necessary.

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