Equivalent & Substitute Parts for SS14/1 Schottky Diode

Part Overview

The SS14/1 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 40 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing production and design requirements. The part exhibits fast recovery characteristics with reverse recovery time ≤ 500 ns at currents > 200 mA, making it suitable for high-frequency rectification applications.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the SS14/1 is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) Maximum: 40 V (exact match required)
Current - Average Rectified (Io): 1 A (minimum requirement; higher ratings acceptable)
Technology: Schottky (mandatory)
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io) (mandatory)
Mounting Type: Surface Mount (mandatory)

Secondary Compatibility Factors:

Package / Case: DO-214AC (SMA) preferred for direct mechanical compatibility; alternative packages (SOD-123W, SOD-123T, PMDS) acceptable with board layout modification
Operating Temperature Range: Minimum -65°C to 125°C required; extended ranges acceptable
RoHS Compliance: ROHS3 Compliant preferred for regulatory alignment

Substitute parts are grouped into two categories:

Category A - Direct Parametric Equivalents (Same Manufacturer): Parts SS14-E3/5AT and SS14-E3/61T are Vishay products with identical electrical specifications to SS14/1, differing only in packaging format (Tape & Reel vs. Cut Tape & Digi-Reel). Both are active products with ROHS3 compliance.

Category B - Cross-Manufacturer Equivalents (Electrical Match): Parts B140-13-F (Diodes Incorporated), CDBA140SL-HF (Comchip Technology), MBRA140T3G (onsemi), and PMEG4010ETR,115 (Nexperia USA Inc.) meet or exceed the primary electrical specifications with identical 40 V / 1 A ratings and fast recovery characteristics. These parts are active products with ROHS3 compliance.

Category C - Functional Alternatives (Higher Current Rating): Part CDBA140SL-HF (Comchip Technology) provides 1.4 A rating, exceeding the 1 A requirement while maintaining 40 V reverse voltage and fast recovery speed.

Category D - Reduced Current Alternatives (Package Variation): Part BAT165E6327HTSA1 (Infineon Technologies) provides 750 mA rating in SOD-323 package, suitable for applications where current requirement is ≤ 750 mA and package size reduction is acceptable.

Category E - Higher Current Alternatives (Package Variation): Part RB056L-40TE25 (Rohm Semiconductor) provides 3 A rating in PMDS package, suitable for applications requiring higher current capacity with 40 V reverse voltage specification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV @ A]	Speed [ns]	Ir @ Vr [µA @ V]	Package / Case	Tj (Max) [°C]	Product Status	RoHS Status
SS14/1	Vishay	40	1	500 @ 1	≤ 500	200 @ 40	DO-214AC, SMA	125	Obsolete	Non-compliant
SS14-E3/5AT	Vishay	40	1	500 @ 1	≤ 500	200 @ 40	DO-214AC, SMA	125	Active	ROHS3 Compliant
SS14-E3/61T	Vishay	40	1	500 @ 1	≤ 500	200 @ 40	DO-214AC, SMA	125	Active	ROHS3 Compliant
B140-13-F	Diodes Incorporated	40	1	500 @ 1	≤ 500	500 @ 40	DO-214AC, SMA	150	Active	ROHS3 Compliant
BAT165E6327HTSA1	Infineon Technologies	40	0.75	740 @ 0.75	≤ 500	50 @ 40	SC-76, SOD-323	150	Active	ROHS3 Compliant
CDBA140SL-HF	Comchip Technology	40	1.4	330 @ 1	≤ 500	1000 @ 40	DO-214AC, SMA	100	Active	ROHS3 Compliant
CDBM140-G	Comchip Technology	40	1	500 @ 1	≤ 500	500 @ 40	SOD-123T	125	Active	ROHS3 Compliant
MBRA140T3G	onsemi	40	1	550 @ 1	≤ 500	500 @ 40	DO-214AC, SMA	125	Active	ROHS3 Compliant
PMEG4010ER,115	Nexperia USA Inc.	40	1	490 @ 1	≤ 500	50 @ 40	SOD-123W	150	Active	ROHS3 Compliant
PMEG4010ETR,115	Nexperia USA Inc.	40	1	490 @ 1	≤ 500	50 @ 40	SOD-123W	175	Active	ROHS3 Compliant
RB056L-40TE25	Rohm Semiconductor	40	3	670 @ 3	≤ 500	50 @ 40	DO-214AC, SMA	150	Not For New Designs	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications and Package):

SS14-E3/5AT and SS14-E3/61T are the primary recommended substitutes. Both are manufactured by Vishay and provide identical electrical and mechanical specifications to the obsolete SS14/1. The distinction between these parts is packaging format: SS14-E3/5AT is supplied in Tape & Reel format with 20,292 units in stock, while SS14-E3/61T is supplied in Cut Tape & Digi-Reel format with 204,599 units in stock. Both parts are active products with ROHS3 compliance, addressing regulatory requirements that the original SS14/1 does not meet.

For Cross-Manufacturer Equivalents (Same Package, Active Status):

B140-13-F (Diodes Incorporated), MBRA140T3G (onsemi), and PMEG4010ETR,115 (Nexperia USA Inc.) are active products meeting the 40 V / 1 A specification with DO-214AC (SMA) or SOD-123W packages. All three are ROHS3 compliant. B140-13-F and MBRA140T3G maintain the DO-214AC (SMA) package for direct board compatibility. PMEG4010ETR,115 uses SOD-123W package, requiring board layout modification but offering superior reverse leakage characteristics (50 µA vs. 200 µA) and extended maximum junction temperature (175°C).

For Higher Current Applications:

CDBA140SL-HF (Comchip Technology) provides 1.4 A rating while maintaining 40 V reverse voltage and fast recovery characteristics in DO-214AC (SMA) package. This part is suitable for applications where the 1 A rating of SS14/1 is marginal and additional current capacity is beneficial. The part is active and ROHS3 compliant.

For Reduced Current Applications with Package Size Reduction:

BAT165E6327HTSA1 (Infineon Technologies) provides 750 mA rating in SOD-323 package. This part is suitable only for applications where current requirement does not exceed 750 mA and where package size reduction is a design objective. The part is active and ROHS3 compliant.

For Higher Current Applications with Package Size Increase:

RB056L-40TE25 (Rohm Semiconductor) provides 3 A rating in PMDS package. This part is marked as "Not For New Designs" and should be avoided for new product development. It is included for reference only in cases where existing designs require higher current capacity.

Compliance and Regulatory Considerations:

The original SS14/1 is RoHS non-compliant. All recommended active substitutes (SS14-E3/5AT, SS14-E3/61T, B140-13-F, CDBA140SL-HF, CDBM140-G, MBRA140T3G, PMEG4010ER,115, PMEG4010ETR,115) are ROHS3 compliant, satisfying current regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can SS14-E3/5AT and SS14-E3/61T be used interchangeably with SS14/1?

A: Yes. Both parts are manufactured by Vishay and provide identical electrical specifications (40 V, 1 A, 500 mV forward voltage, fast recovery ≤ 500 ns) and mechanical compatibility (DO-214AC SMA package). The only difference is packaging format: SS14-E3/5AT is Tape & Reel, and SS14-E3/61T is Cut Tape & Digi-Reel. Both are active products with ROHS3 compliance, whereas SS14/1 is obsolete and RoHS non-compliant.

Q: What is the difference between DO-214AC (SMA) and SOD-123W packages?

A: DO-214AC (SMA) is a larger surface mount package suitable for higher current applications and standard PCB assembly processes. SOD-123W is a smaller package that reduces board space but requires modified assembly tooling and placement accuracy. Electrical specifications remain identical; package selection depends on board layout constraints and assembly capabilities.

Q: Can B140-13-F replace SS14/1 directly on the PCB?

A: Yes. B140-13-F is manufactured by Diodes Incorporated and uses the same DO-214AC (SMA) package as SS14/1. Electrical specifications are equivalent (40 V, 1 A, 500 mV forward voltage, fast recovery ≤ 500 ns). The part is active and ROHS3 compliant. No board layout modification is required.

Q: Why does CDBA140SL-HF have a lower forward voltage (330 mV @ 1 A) compared to SS14/1 (500 mV @ 1 A)?

A: CDBA140SL-HF is manufactured by Comchip Technology and exhibits superior forward voltage characteristics due to different semiconductor material processing. The lower forward voltage reduces power dissipation in the diode, which is beneficial for thermal management. The part maintains the same 40 V reverse voltage rating and fast recovery characteristics. The 1.4 A current rating exceeds the 1 A requirement of SS14/1.

Q: Is PMEG4010ETR,115 suitable for high-temperature applications?

A: Yes. PMEG4010ETR,115 is manufactured by Nexperia USA Inc. and has a maximum junction temperature of 175°C, compared to 125°C for SS14/1. This part is suitable for applications requiring extended temperature operation. The part uses SOD-123W package, which differs from the DO-214AC (SMA) package of SS14/1, requiring board layout modification.

Q: What is the significance of reverse leakage current differences among substitute parts?

A: Reverse leakage current (Ir) represents the small current flowing through the diode when reverse biased. Lower reverse leakage indicates better diode quality and lower power dissipation in standby conditions. SS14/1 specifies 200 µA @ 40 V, while PMEG4010ETR,115 and BAT165E6327HTSA1 specify 50 µA @ 40 V. Lower leakage is advantageous for low-power applications but does not affect high-current rectification performance.

Q: Can RB056L-40TE25 be used as a substitute for SS14/1?

A: RB056L-40TE25 meets the electrical specifications (40 V, fast recovery ≤ 500 ns) and uses the same DO-214AC (SMA) package. However, this part is marked as "Not For New Designs" by Rohm Semiconductor, indicating end-of-life status. It should not be selected for new product development. Use only if existing designs require higher current capacity (3 A vs. 1 A) and no alternative is available.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape in reel format, suitable for high-volume automated assembly. Cut Tape (CT) & Digi-Reel packaging supplies components on cut tape segments, suitable for lower-volume or mixed-component assembly. Electrical specifications are identical; packaging selection depends on production volume and assembly equipment compatibility.

Q: Does CDBM140-G provide the same performance as SS14/1 despite using SOD-123T package?

A: CDBM140-G is manufactured by Comchip Technology and provides identical electrical specifications to SS14/1 (40 V, 1 A, 500 mV forward voltage, fast recovery ≤ 500 ns). The SOD-123T package is smaller than DO-214AC (SMA), reducing board space. The part is active and ROHS3 compliant. Board layout modification is required to accommodate the different package footprint.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed (SS14-E3/5AT, SS14-E3/61T, B140-13-F, BAT165E6327HTSA1, CDBA140SL-HF, CDBM140-G, MBRA140T3G, PMEG4010ER,115, PMEG4010ETR,115) are ROHS3 compliant. RB056L-40TE25 is also ROHS3 compliant but is marked "Not For New Designs." The original SS14/1 is RoHS non-compliant, making substitution necessary for regulatory compliance.

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