S1K-TP Equivalent & Substitute Parts

Part Overview

The S1K-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 800 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AA (HSMB) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain identical electrical and mechanical specifications for seamless integration into existing designs.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	800 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 @ 800 V
Capacitance @ Vr, F	12 pF @ 4 V, 1 MHz
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

Substitution of the S1K-TP is determined by strict equivalence across the following critical parameters: reverse voltage rating (800 V), average rectified current (1 A), forward voltage drop (1.1 V @ 1 A), reverse recovery time (2 µs), reverse leakage current (5 µA @ 800 V), junction capacitance (12 pF @ 4 V, 1 MHz), package type (DO-214AA/SMB), and operating temperature range (-55°C to 150°C). All identified substitutes maintain these specifications, ensuring functional and mechanical compatibility. Packaging format (bulk versus tape and reel) does not affect electrical substitutability but may impact procurement and assembly workflows.

Parameter Comparison

Parameter	S1K-TP (Micro Commercial Co)	S1K-LTP (Micro Commercial Co)	S1KB (Taiwan Semiconductor)	S1KBH (Taiwan Semiconductor)	S1K_R1_00001 (Panjit International)
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V	800 V	800 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 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 @ 1 A
Reverse Recovery Time (trr)	2 µs	2 µs	Not specified	Not specified	Not specified
Current - Reverse Leakage @ Vr	5 µA @ 800 V	5 µA @ 800 V	5 µA @ 800 V	5 µA @ 800 V	1 µA @ 800 V
Capacitance @ Vr, F	12 pF @ 4 V, 1 MHz	12 pF @ 4 V, 1 MHz	12 pF @ 4 V, 1 MHz	12 pF @ 4 V, 1 MHz	12 pF @ 4 V, 1 MHz
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	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
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)
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active

Engineering Selection Recommendations

S1K-LTP (Micro Commercial Co) is the primary substitute, offering identical electrical and mechanical specifications with active product status and tape and reel packaging. This part maintains continuity with the original manufacturer while ensuring ongoing availability.

S1KB (Taiwan Semiconductor Corporation) provides parametric equivalence across all critical specifications with higher inventory availability (6903 pcs). This part is suitable for applications where manufacturer diversification is acceptable.

S1KBH (Taiwan Semiconductor Corporation) is functionally equivalent to S1KB with additional automotive-grade qualification (AEC-Q101). Selection of this variant is appropriate for automotive or mission-critical applications requiring enhanced reliability documentation.

S1K_R1_00001 (Panjit International Inc.) meets all electrical specifications with superior reverse leakage performance (1 µA versus 5 µA @ 800 V). This part is suitable for low-leakage applications where reduced standby current is beneficial.

All substitutes maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and identical thermal operating ranges, ensuring direct compatibility with existing PCB assembly and environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can S1K-LTP directly replace S1K-TP without design changes?

A: Yes. S1K-LTP is manufactured by the same supplier (Micro Commercial Co) and maintains identical electrical parameters, forward voltage characteristics, reverse recovery time, and package specifications. The only difference is packaging format (tape and reel versus bulk) and active product status.

Q: What is the difference between S1KB and S1KBH?

A: Both parts are manufactured by Taiwan Semiconductor Corporation and share identical electrical specifications. S1KBH carries automotive-grade qualification (AEC-Q101) and is designated for automotive applications. For non-automotive applications, S1KB is functionally equivalent.

Q: Why does S1K_R1_00001 show lower reverse leakage current (1 µA versus 5 µA)?

A: S1K_R1_00001 manufactured by Panjit International Inc. exhibits superior reverse leakage performance. This represents a tighter manufacturing tolerance and is not a deficiency in other substitutes. The part remains fully compatible with the original S1K-TP specification, which allows up to 5 µA leakage.

Q: Are all substitutes available in the same DO-214AA package?

A: Yes. All identified substitutes use the DO-214AA (SMB) surface mount package with identical footprint and pinout, ensuring direct PCB compatibility without layout modifications.

Q: Does the tape and reel packaging of S1K-LTP affect electrical performance?

A: No. Packaging format (tape and reel versus bulk) is a procurement and assembly consideration only. Electrical performance, thermal characteristics, and reliability are unaffected by packaging format.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All identified substitutes maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), meeting environmental and regulatory requirements equivalent to the original S1K-TP.

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