SK14-13 Schottky Diode 40V 1A SMB Equivalent & Substitute Parts

Part Overview

The SK14-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 40V DC reverse voltage and 1A average rectified current in a Surface Mount SMB (DO-214AA) package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. The SK14-13 operates across a junction temperature range of -65°C to 125°C and exhibits fast recovery characteristics suitable for high-frequency switching applications.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-65 to 125	°C
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the SK14-13 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal 40V
Current - Average Rectified (Io): Must equal or exceed 1A
Technology: Must be Schottky
Speed: Must be Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Must be Surface Mount
Package / Case: Must be compatible with DO-214AA, SMB footprint

Secondary Considerations:

Forward voltage (Vf) characteristics
Reverse leakage current (Ir)
Operating temperature range
RoHS compliance status

Substitute parts are grouped into two categories:

Category 1: Direct Electrical & Package Equivalents (1A Rating, SMB Package) Parts maintaining identical 1A current rating and SMB package form factor with 40V reverse voltage specification.

Category 2: Higher Current Capacity Alternatives (≥1A Rating, SMB Package) Parts with current ratings exceeding 1A in the same SMB package, suitable for applications with design margin requirements or higher current demands.

Category 3: Alternative Package Solutions (1A Rating, Different Package) Parts with matching electrical specifications but different surface mount packages, applicable when board layout permits package substitution.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Tj (Max) [°C]	Product Status	RoHS Status
SK14-13	Diodes Incorporated	40	1	550 @ 1A	500 @ 40V	DO-214AA, SMB	125	Discontinued	Non-compliant
BAT165E6327HTSA1	Infineon Technologies	40	0.75	740 @ 750mA	50 @ 40V	SC-76, SOD-323	150	Active	ROHS3 Compliant
PMEG4010EP,115	Nexperia USA Inc.	40	1	490 @ 1A	50 @ 40V	SOD-128	150	Active	ROHS3 Compliant
SK14B	Taiwan Semiconductor Corporation	40	1	500 @ 1A	500 @ 40V	DO-214AA, SMB	125	Active	ROHS3 Compliant
SK34B-LTP	Micro Commercial Co	40	3	500 @ 3A	500 @ 40V	DO-214AA, SMB	150	Active	ROHS3 Compliant
SK44BL-TP	Micro Commercial Co	40	4	450 @ 4A	500 @ 40V	DO-214AA, HSMB	150	Active	ROHS3 Compliant
STPS140U	STMicroelectronics	40	1	550 @ 1A	12 @ 40V	DO-214AA, SMB	150	Active	ROHS3 Compliant
STPS1L40U	STMicroelectronics	40	1	500 @ 1A	35 @ 40V	DO-214AA, SMB	150	Active	ROHS3 Compliant
STPS1L40UY	STMicroelectronics	40	1	500 @ 1A	35 @ 40V	DO-214AA, SMB	150	Active	ROHS3 Compliant
STPS2L40U	STMicroelectronics	40	2	430 @ 2A	220 @ 40V	DO-214AA, SMB	150	Active	ROHS3 Compliant
STPS340U	STMicroelectronics	40	3	630 @ 3A	20 @ 40V	DO-214AA, SMB	150	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Specifications & Package):

The SK14B manufactured by Taiwan Semiconductor Corporation is the primary direct replacement for the SK14-13. Both parts maintain 40V reverse voltage, 1A average rectified current, and DO-214AA SMB package compatibility. The SK14B is currently in active production status with ROHS3 compliance, addressing the RoHS non-compliance limitation of the discontinued SK14-13. Operating temperature range is identical at -65°C to 125°C.

Equivalent Performance with Enhanced Compliance:

STPS1L40U and STPS1L40UY (STMicroelectronics) provide electrical equivalence at 40V, 1A with SMB packaging. Both are active products with ROHS3 compliance. The STPS1L40UY variant includes automotive-grade qualification and extended temperature range (-40°C to 150°C). Forward voltage is 500 mV @ 1A, matching the SK14B specification. Reverse leakage is 35 µA @ 40V, significantly lower than the SK14-13 specification of 500 µA.

STPS140U (STMicroelectronics) maintains identical electrical ratings with forward voltage of 550 mV @ 1A, matching the SK14-13 specification exactly. This part is active with ROHS3 compliance and extended maximum junction temperature of 150°C.

Higher Current Capacity Alternatives (Same Package):

STPS2L40U provides 2A capacity in the same SMB package with 40V rating and active product status. Forward voltage is 430 mV @ 2A with ROHS3 compliance.

SK34B-LTP and STPS340U both provide 3A capacity in DO-214AA SMB packages with 40V reverse voltage and active status. SK34B-LTP is manufactured by Micro Commercial Co; STPS340U is manufactured by STMicroelectronics. Both are ROHS3 compliant.

SK44BL-TP provides 4A capacity in DO-214AA HSMB package with 40V rating, active status, and ROHS3 compliance.

Alternative Package Solution:

PMEG4010EP,115 (Nexperia USA Inc.) maintains 40V, 1A electrical specifications with forward voltage of 490 mV @ 1A. This part uses SOD-128 package instead of SMB, requiring board layout verification for footprint compatibility. Product is active with ROHS3 compliance and 150°C maximum junction temperature.

Not Recommended:

BAT165E6327HTSA1 (Infineon Technologies) has reduced current rating of 750 mA, below the 1A requirement of the SK14-13. Although it maintains 40V reverse voltage and offers ROHS3 compliance, the lower current capacity makes it unsuitable for direct replacement in applications requiring full 1A capacity.

Frequently Asked Questions (FAQ)

Q: Can the SK14B directly replace the SK14-13 in existing designs?

A: Yes. The SK14B maintains identical electrical specifications (40V, 1A, Schottky technology, fast recovery) and package form factor (DO-214AA SMB). Both parts have matching operating temperature ranges (-65°C to 125°C). The primary difference is that SK14B is in active production with ROHS3 compliance, whereas SK14-13 is discontinued and RoHS non-compliant. No circuit modifications are required.

Q: What is the difference between STPS1L40U and STPS1L40UY?

A: Both parts are electrically identical with 40V reverse voltage, 1A average rectified current, and SMB packaging. The STPS1L40UY variant includes automotive-grade qualification (Series Q designation) and operates across -40°C to 150°C, compared to the standard STPS1L40U which operates to 150°C maximum. The STPS1L40UY is supplied on Tape & Reel (TR) packaging, while STPS1L40U is supplied on Cut Tape (CT) & Digi-Reel. Select STPS1L40UY for automotive applications requiring extended low-temperature performance.

Q: Can I use a higher current-rated diode like the SK34B-LTP (3A) instead of the SK14-13 (1A)?

A: Yes. Higher current-rated diodes are electrically compatible when reverse voltage and package specifications match. The SK34B-LTP maintains 40V reverse voltage and DO-214AA SMB package compatibility. The 3A rating provides design margin and does not degrade performance in 1A applications. Forward voltage at 3A operation is 500 mV, comparable to the SK14-13 specification. This substitution is suitable for applications where current capacity margin is desired.

Q: Why does the PMEG4010EP,115 have lower forward voltage (490 mV) than the SK14-13 (550 mV)?

A: Forward voltage variation is a normal characteristic of Schottky diodes from different manufacturers and is measured at the specified current level. The PMEG4010EP,115 is measured at 1A, identical to the SK14-13. Lower forward voltage indicates improved efficiency in the forward-biased state, reducing power dissipation. This is a beneficial characteristic and does not indicate incompatibility. However, the PMEG4010EP,115 uses SOD-128 package instead of SMB, requiring board layout verification.

Q: What does "Fast Recovery ≤ 500ns, > 200mA (Io)" mean?

A: This specification indicates the diode's switching speed characteristic. Recovery time of 500 nanoseconds or less applies when reverse current exceeds 200 mA. This fast recovery time is essential for high-frequency switching applications and prevents excessive reverse current spikes during switching transitions. All substitute parts listed maintain this fast recovery specification, ensuring compatibility in switching applications.

Q: Is the BAT165E6327HTSA1 a suitable replacement?

A: No. Although the BAT165E6327HTSA1 maintains 40V reverse voltage and Schottky technology, its current rating is 750 mA, which is below the 1A requirement of the SK14-13. This part is suitable only for applications with maximum current requirements of 750 mA or less. For full 1A capacity applications, select alternatives with 1A or higher ratings.

Q: What is the significance of RoHS compliance in selecting a substitute?

A: RoHS (Restriction of Hazardous Substances) compliance is a regulatory requirement in many markets, particularly for products sold in the European Union. The SK14-13 is RoHS non-compliant, while all active substitute parts listed are ROHS3 compliant. If your application or end-market requires RoHS compliance, select from the active substitute parts. If legacy RoHS non-compliant designs are acceptable, the SK14-13 alternatives remain functionally equivalent.

Q: Can I substitute the SK14-13 with STPS140U?

A: Yes. The STPS140U maintains identical electrical specifications: 40V reverse voltage, 1A average rectified current, 550 mV forward voltage @ 1A, and fast recovery characteristics. Both use DO-214AA SMB packaging. The STPS140U is in active production with ROHS3 compliance and 150°C maximum junction temperature. This is a direct functional equivalent suitable for all applications where the SK14-13 was specified.

Q: What is the difference between SMB and HSMB packages?

A: SMB (Surface Mount Blade) and HSMB (High-power Surface Mount Blade) are both DO-214AA package variants. HSMB is a higher thermal performance variant designed for applications requiring improved heat dissipation. The SK44BL-TP uses HSMB packaging and is rated for 4A, compared to standard SMB packages used in 1A and 2A rated parts. HSMB is physically compatible with standard SMB footprints but provides superior thermal characteristics for higher current applications.

Q: Which substitute part offers the lowest reverse leakage current?

A: The STPS340U offers the lowest reverse leakage current at 20 µA @ 40V, compared to the SK14-13 specification of 500 µA @ 40V. Lower reverse leakage reduces standby power consumption and is beneficial in battery-powered or low-power applications. However, the STPS340U is rated for 3A, providing higher current capacity than the 1A requirement. For 1A applications with low reverse leakage priority, STPS1L40U and STPS1L40UY both offer 35 µA @ 40V leakage.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message