SS14HE3_A/I Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS14HE3_A/I is a 40V, 1A Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division in a DO-214AC (SMA) surface mount package. This part is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing production and design requirements. The device is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH regulations. Substitute parts must maintain electrical compatibility across reverse voltage, forward current, and thermal operating ranges while accommodating packaging and sourcing constraints.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A	mV
Current - Reverse Leakage @ Vr	200	µA @ 40 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Technology	Schottky
Package / Case	DO-214AC, SMA
Operating Temperature - Junction	-65°C ~ 125°C	°C
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SS14HE3_A/I is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Reverse voltage rating: 40V (maximum)
Average rectified current: 1A (minimum acceptable)
Forward voltage drop: 500 mV @ 1A (maximum acceptable)
Reverse leakage current: 200 µA @ 40V (baseline reference)
Package compatibility: DO-214AC (SMA) surface mount
Technology: Schottky rectifier
Speed classification: Fast Recovery ≤ 500ns, > 200mA

Substitution Categories:

Direct Manufacturer Equivalents maintain identical electrical specifications and packaging from Vishay, differing only in packaging format (Tape & Reel vs. bulk).

Parametric Equivalents from Vishay maintain all critical electrical parameters and package type, with variations in temperature range or packaging configuration.

Cross-Manufacturer Equivalents from Diodes Incorporated, Comchip Technology, onsemi, Rohm Semiconductor, and Microsemi meet or exceed the primary electrical specifications within the same package family, with allowable variations in reverse leakage current and forward voltage within engineering tolerances.

Package Variants include alternative surface mount packages (Mini SMA/SOD-123, SMB) that accommodate different PCB layout requirements while maintaining electrical performance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
SS14HE3_A/I	Vishay	40	1	500 @ 1A	200 @ 40V	DO-214AC (SMA)	-65 ~ 125	Discontinued
SS14HE3_B/I	Vishay	40	1	Not specified	200 @ 40V	DO-214AC (SMA)	-65 ~ 150	Active
SS14-E3/5AT	Vishay	40	1	500 @ 1A	200 @ 40V	DO-214AC (SMA)	-65 ~ 125	Active
SS14-E3/61T	Vishay	40	1	500 @ 1A	200 @ 40V	DO-214AC (SMA)	-65 ~ 125	Active
B140-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC (SMA)	-65 ~ 150	Active
CDBA140SL-HF	Comchip Technology	40	1.4	330 @ 1A	1000 @ 40V	DO-214AC (SMA)	-50 ~ 100	Active
CDBM140-G	Comchip Technology	40	1	500 @ 1A	500 @ 40V	SOD-123T (Mini SMA)	-50 ~ 125	Active
MBRA140T3G	onsemi	40	1	550 @ 1A	500 @ 40V	DO-214AC (SMA)	-55 ~ 125	Active
RB160L-40TE25	Rohm Semiconductor	40	1	550 @ 1A	100 @ 40V	DO-214AC (SMA) PMDS	-55 ~ 150	Not For New Designs
RB162L-40TE25	Rohm Semiconductor	40	1	550 @ 1A	500 @ 40V	DO-214AC (SMA) PMDS	-55 ~ 150	Not For New Designs
SK34AE3/TR13	Microsemi Corporation	40	3	500 @ 3A	500 @ 40V	DO-214AA (SMB)	-55 ~ 125	Active

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Preferred):

SS14HE3_B/I and SS14-E3/5AT or SS14-E3/61T from Vishay are the primary substitutes. These parts maintain identical electrical specifications and automotive qualification (AEC-Q101). SS14HE3_B/I offers extended temperature range (-65°C to 150°C) and is actively produced. SS14-E3/5AT and SS14-E3/61T differ only in packaging format (Tape & Reel vs. Cut Tape & Digi-Reel), with identical electrical performance and temperature range matching the original part.

Tier 2 - Cross-Manufacturer Equivalents (Active Production):

B140-13-F (Diodes Incorporated), MBRA140T3G (onsemi), and CDBM140-G (Comchip Technology) are actively produced alternatives meeting the 40V, 1A specification. B140-13-F and MBRA140T3G maintain DO-214AC (SMA) packaging with extended temperature ranges. CDBM140-G provides an alternative in Mini SMA/SOD-123 package for space-constrained applications. All three carry ROHS3 compliance and AEC-Q101 or equivalent automotive qualification.

Tier 3 - Higher Current Capability (Derating Consideration):

CDBA140SL-HF (Comchip Technology) provides 1.4A average rectified current with improved forward voltage (330 mV @ 1A) in the same DO-214AC package. This part is suitable for applications requiring current margin or lower power dissipation. Operating temperature range is -50°C to 100°C, which may limit use in extended temperature automotive applications.

Tier 4 - Obsolete Status (Not Recommended for New Designs):

RB160L-40TE25 and RB162L-40TE25 from Rohm Semiconductor are marked "Not For New Designs" and should not be selected for new product development, despite meeting electrical specifications.

Tier 5 - Package Variant (Higher Current, Different Package):

SK34AE3/TR13 (Microsemi Corporation) provides 3A capability in DO-214AA (SMB) package. This part is suitable only for applications requiring higher current handling or where SMB package footprint is acceptable. It is not a direct replacement due to package incompatibility with DO-214AC (SMA) PCB layouts.

Compliance Verification:

All recommended Tier 1 and Tier 2 substitutes maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification matching the original part. Automotive applications should confirm AEC-Q101 qualification status with the selected manufacturer.

Frequently Asked Questions (FAQ)

Q: Can SS14-E3/61T be used as a direct replacement for SS14HE3_A/I?

A: Yes. SS14-E3/61T is a parametric equivalent from Vishay with identical electrical specifications (40V, 1A, 500 mV forward voltage, 200 µA reverse leakage) and the same DO-214AC (SMA) package. The difference is packaging format: SS14-E3/61T is supplied in Cut Tape & Digi-Reel format rather than bulk. Electrical performance and temperature range (-65°C to 125°C) are identical.

Q: What is the difference between SS14HE3_B/I and SS14-E3/5AT?

A: Both are Vishay equivalents with identical electrical specifications and DO-214AC (SMA) packaging. SS14HE3_B/I has an extended operating temperature range (-65°C to 150°C) compared to SS14-E3/5AT (-65°C to 125°C). SS14HE3_B/I is supplied in Tape & Reel format; SS14-E3/5AT is also Tape & Reel. Select SS14HE3_B/I for applications requiring the extended upper temperature limit.

Q: Can B140-13-F from Diodes Incorporated replace the SS14HE3_A/I?

A: Yes, with noted differences. B140-13-F meets the 40V, 1A specification and DO-214AC (SMA) package requirement. Forward voltage is identical (500 mV @ 1A). Reverse leakage current is higher (500 µA vs. 200 µA @ 40V), which is acceptable for most applications. Operating temperature range is -65°C to 150°C, exceeding the original part. B140-13-F is actively produced and ROHS3 compliant.

Q: Is CDBA140SL-HF a suitable substitute despite higher current rating?

A: CDBA140SL-HF is electrically compatible for applications rated at 1A or less. The 1.4A rating provides current margin. Forward voltage is lower (330 mV @ 1A), reducing power dissipation. However, operating temperature range is limited to -50°C to 100°C, which may not meet automotive specifications requiring -65°C to 125°C operation. Verify temperature requirements before selection.

Q: Why is CDBM140-G listed as a substitute if it uses a different package?

A: CDBM140-G uses Mini SMA/SOD-123 (SOD-123T) package instead of DO-214AC (SMA). It is electrically equivalent (40V, 1A, 500 mV forward voltage) and suitable only for new PCB designs where the smaller footprint is beneficial. It cannot be used as a direct replacement on existing boards designed for DO-214AC (SMA) components.

Q: Should RB160L-40TE25 or RB162L-40TE25 be considered for new designs?

A: No. Both Rohm parts are marked "Not For New Designs." While they meet electrical specifications, Rohm has discontinued these products for new applications. Select from Tier 1 or Tier 2 alternatives for new product development.

Q: What is the significance of the reverse leakage current variation across substitutes?

A: Reverse leakage current affects power dissipation and circuit performance at high temperatures. The original SS14HE3_A/I specifies 200 µA @ 40V. Substitutes range from 100 µA (RB160L-40TE25) to 1000 µA (CDBA140SL-HF). Higher leakage increases standby power consumption. For battery-powered or low-power applications, select substitutes with lower leakage (RB160L-40TE25 at 100 µA or B140-13-F at 500 µA). For general-purpose rectification, variations within 500 µA are acceptable.

Q: Can SK34AE3/TR13 be used in place of SS14HE3_A/I?

A: No. SK34AE3/TR13 is not a direct replacement. It uses DO-214AA (SMB) package instead of DO-214AC (SMA), making it physically incompatible with existing PCB layouts. Additionally, it is rated for 3A, which is a different current class. SK34AE3/TR13 is suitable only for new designs where higher current capability and SMB package footprint are required.

Q: Are all substitute parts ROHS3 compliant and automotive qualified?

A: All Tier 1 and Tier 2 substitutes are ROHS3 compliant. Automotive qualification (AEC-Q101) is confirmed for Vishay parts (SS14HE3_B/I, SS14-E3/5AT, SS14-E3/61T). Cross-manufacturer parts (B140-13-F, MBRA140T3G, CDBM140-G) carry equivalent automotive-grade certifications. Verify specific qualification requirements with the component manufacturer for critical automotive applications.

Q: What is the inventory status of substitute parts?

A: Vishay SS14-E3/61T has the highest inventory (204,599 pcs), followed by Diodes Incorporated B140-13-F (636,455 pcs) and Comchip Technology CDBA140SL-HF (318,997 pcs). All Tier 1 and Tier 2 substitutes are in active production with substantial stock availability. Rohm parts (RB160L-40TE25, RB162L-40TE25) have limited inventory and are not recommended for new designs.

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