Equivalent & Substitute Parts for S1KB-13

Part Overview

The S1KB-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 800 V DC reverse voltage and 1 A average rectified current in a Surface Mount SMB (DO-214AA) package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with modified parameters suitable for specific application requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	V
Reverse Recovery Time (trr)	3	µs
Current - Reverse Leakage @ Vr	5	µA @ 800 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-65 to 150	°C

Substitute Part Grouping Explanation

Substitution of the S1KB-13 is determined by the following critical parameters: reverse voltage rating (Vr), average rectified current (Io), forward voltage drop (Vf), recovery characteristics (trr), reverse leakage current, package type, and operating temperature range. Parts are grouped into two categories:

Category 1: Direct Equivalents (Identical Electrical and Mechanical Specifications) Parts maintaining 800 V reverse voltage, 1 A current rating, SMB package, and equivalent thermal characteristics enable direct replacement without circuit redesign.

Category 2: Functional Substitutes (Modified Electrical Specifications) Parts with higher voltage ratings, increased current capacity, or different recovery speeds provide functional alternatives where application requirements permit parameter variation. These substitutes require verification of circuit tolerance to modified electrical characteristics.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Package	Product Status	RoHS Status
S1KB-13	Diodes Incorporated	800	1	1.1 @ 1A	3 µs	DO-214AA, SMB	Discontinued	Non-compliant
S1KB-13-F	Diodes Incorporated	800	1	1.1 @ 1A	3 µs	DO-214AA, SMB	Active	ROHS3 Compliant
S1K-13-F	Diodes Incorporated	800	1	1.1 @ 1A	3 µs	DO-214AC, SMA	Active	ROHS3 Compliant
S1K	YAGEO	800	1	1.1	—	DO-214AC	Active	ROHS3 Compliant
STTH208U	STMicroelectronics	800	2	1.65 @ 2A	75 ns	DO-214AA, SMB	Active	ROHS3 Compliant
UF1M-TP	Micro Commercial Co	1000	1	—	100 ns	DO-214AA, SMB	Active	ROHS3 Compliant

Engineering Selection Recommendations

S1KB-13-F (Diodes Incorporated): This part is the primary equivalent for the discontinued S1KB-13. It maintains identical electrical specifications (800 V, 1 A, 1.1 V forward drop, 3 µs recovery time) and mechanical packaging (DO-214AA, SMB). The S1KB-13-F is active in production with ROHS3 compliance and represents the direct replacement path. Inventory availability is 18,400 units.

S1K-13-F (Diodes Incorporated): This part provides electrical equivalence with package variation. It maintains 800 V reverse voltage, 1 A current, and 1.1 V forward drop specifications but uses DO-214AC (SMA) package instead of SMB. This substitute requires PCB layout modification due to different footprint geometry. ROHS3 compliant with 215,900 units in stock.

S1K (YAGEO): This part offers electrical equivalence from an alternative manufacturer. It maintains 800 V reverse voltage and 1 A current rating with DO-214AC package. Complete recovery time specification is not provided in available data. ROHS3 compliant with 5,824 units in stock.

STTH208U (STMicroelectronics): This part provides functional substitution with increased current capacity (2 A versus 1 A) and faster recovery characteristics (75 ns versus 3 µs). The 800 V reverse voltage rating matches the original specification. Forward voltage drop increases to 1.65 V at 2 A operation. This substitute is suitable for applications where higher current capacity and faster switching are beneficial. ROHS3 compliant with 20,300 units in stock.

UF1M-TP (Micro Commercial Co): This part provides functional substitution with elevated reverse voltage rating (1000 V versus 800 V) and faster recovery characteristics (100 ns versus 3 µs). Current rating remains 1 A. This substitute is suitable for applications requiring higher voltage margin or faster switching performance. ROHS3 compliant with 1,415 units in stock.

Frequently Asked Questions (FAQ)

Q: Can S1KB-13-F be used as a direct replacement for S1KB-13?

A: Yes. S1KB-13-F maintains identical electrical parameters (800 V, 1 A, 1.1 V forward drop, 3 µs recovery time) and mechanical packaging (DO-214AA, SMB). The primary difference is product status (active versus discontinued) and RoHS compliance (ROHS3 versus non-compliant). No circuit modification is required.

Q: What is the difference between S1KB-13-F and S1K-13-F?

A: Both parts are manufactured by Diodes Incorporated with identical electrical specifications. The difference is package type: S1KB-13-F uses DO-214AA (SMB) while S1K-13-F uses DO-214AC (SMA). These packages have different footprint geometries and require different PCB layouts. Electrical performance is equivalent.

Q: Can STTH208U replace S1KB-13 in all applications?

A: STTH208U provides functional substitution with modified electrical characteristics. It maintains 800 V reverse voltage but increases current capacity to 2 A and reduces recovery time to 75 ns. Forward voltage drop increases to 1.65 V at 2 A. This substitute is suitable for applications where higher current capacity and faster switching are acceptable or beneficial. Circuit analysis is required to confirm compatibility with modified electrical parameters.

Q: Can UF1M-TP replace S1KB-13 in all applications?

A: UF1M-TP provides functional substitution with elevated reverse voltage (1000 V) and faster recovery (100 ns). Current rating remains 1 A. This substitute is suitable for applications where higher voltage margin or faster switching performance is required. The higher voltage rating provides additional design margin in high-voltage circuits.

Q: Why does S1K-13-F have higher inventory than S1KB-13-F?

A: S1K-13-F uses SMA package (DO-214AC) while S1KB-13-F uses SMB package (DO-214AA). SMA is a smaller package with broader application use across multiple product categories, resulting in higher overall inventory levels. SMB package availability is lower but remains adequate for production requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (S1KB-13-F, S1K-13-F, S1K, STTH208U, UF1M-TP) are ROHS3 compliant. The original S1KB-13 is RoHS non-compliant. Compliance status should be verified for applications subject to RoHS regulatory requirements.

Q: What is the operating temperature range difference between parts?

A: S1KB-13, S1KB-13-F, S1K-13-F, and UF1M-TP operate from -65°C to 150°C junction temperature. STTH208U operates to 175°C maximum junction temperature, providing 25°C additional thermal margin. This difference is relevant for high-temperature applications.

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