SS14-TP Equivalent & Substitute Parts

Part Overview

The SS14-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 40 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer compatible performance within defined parameter tolerances for the same application category.

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	600 mV @ 1 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500 µA @ 40 V	—
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55°C ~ 125°C	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS14-TP is determined by the following critical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 40 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Technology: Schottky rectifier diode
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount
Package / Case: DO-214AC (SMA) or equivalent footprint-compatible packages (SOD-123W, Mini SMA/SOD-123)

Environmental & Compliance Criteria:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
Operating Temperature Range: Must support minimum -55°C to 125°C junction temperature

Substitute parts are grouped into two categories: direct equivalents (identical specifications, different packaging format) and functional substitutes (enhanced or equivalent electrical performance, potentially different package form factors).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Package / Case	Tj (Max) [°C]	Product Status
SS14-TP	Micro Commercial Co	40	1	600 @ 1 A	DO-214AC, SMA	125	Obsolete
SS14-LTP	Micro Commercial Co	40	1	500 @ 1 A	DO-214AC, SMA	125	Active
B140-13-F	Diodes Incorporated	40	1	500 @ 1 A	DO-214AC, SMA	150	Active
CDBA140SL-HF	Comchip Technology	40	1.4	330 @ 1 A	DO-214AC, SMA	100	Active
CDBM140-G	Comchip Technology	40	1	500 @ 1 A	SOD-123T	125	Active
PMEG4010ER,115	Nexperia USA Inc.	40	1	490 @ 1 A	SOD-123W	150	Active
PMEG4010ETR,115	Nexperia USA Inc.	40	1	490 @ 1 A	SOD-123W	175	Active
RB056L-40TE25	Rohm Semiconductor	40	3	670 @ 3 A	DO-214AC, SMA	150	Not For New Designs
RB160L-40TE25	Rohm Semiconductor	40	1	550 @ 1 A	DO-214AC, SMA	150	Not For New Designs
RB168L-40TFTE25	Rohm Semiconductor	40	1	650 @ 1 A	DO-214AC, SMA	150	Active
SS14	SMC Diode Solutions	100	1	850 @ 1 A	DO-214AC, SMA	150	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

SS14-LTP (Micro Commercial Co) is the direct equivalent to SS14-TP. Both parts share identical electrical ratings (40 V, 1 A) and mechanical specifications (DO-214AC, SMA package). SS14-LTP is currently in active production status with superior forward voltage characteristics (500 mV vs. 600 mV @ 1 A) and higher inventory availability (70,100 units). This part is the preferred replacement for obsolete SS14-TP applications.

DO-214AC (SMA) Package Substitutes (Footprint Compatible):

B140-13-F (Diodes Incorporated) and RB160L-40TE25 (Rohm Semiconductor) maintain identical package form factors and electrical ratings. B140-13-F is recommended for new designs due to active product status and extended maximum junction temperature (150°C). RB160L-40TE25 is classified as "Not For New Designs" and should be avoided for new applications.

Higher Current Capability Substitute:

CDBA140SL-HF (Comchip Technology) provides enhanced current rating (1.4 A vs. 1 A) while maintaining 40 V reverse voltage and DO-214AC package compatibility. This part is suitable for applications requiring current margin or thermal headroom, though maximum junction temperature is limited to 100°C.

Compact Package Alternatives (SOD-123W, SOD-123T):

PMEG4010ETR,115 (Nexperia USA Inc.) and CDBM140-G (Comchip Technology) offer reduced footprint packages (SOD-123W and SOD-123T respectively) with equivalent electrical performance. These parts are suitable for space-constrained applications where package size reduction is acceptable. PMEG4010ETR,115 provides the highest maximum junction temperature (175°C) among all substitutes.

Automotive-Grade Option:

RB168L-40TFTE25 (Rohm Semiconductor) is AEC-Q101 qualified and suitable for automotive applications. This part maintains 40 V, 1 A specifications with DO-214AC package compatibility and active product status.

Parts to Avoid:

SS14 (SMC Diode Solutions) has significantly different electrical characteristics (100 V reverse voltage, 850 mV forward voltage) and is not suitable as a direct substitute despite package compatibility. RB056L-40TE25 is rated for 3 A current and is classified as "Not For New Designs."

Frequently Asked Questions (FAQ)

Q: Can SS14-LTP be used as a direct replacement for SS14-TP?

A: Yes. SS14-LTP is the direct equivalent with identical voltage and current ratings (40 V, 1 A), same package (DO-214AC, SMA), and equivalent operating temperature range. SS14-LTP is currently in active production and is the recommended replacement.

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

A: DO-214AC (SMA) and SOD-123W are both surface mount packages for Schottky diodes but have different physical dimensions and PCB footprints. DO-214AC is larger and more common in power applications. SOD-123W is a compact alternative. Parts using different packages require PCB layout modifications and are not pin-for-pin compatible.

Q: Can CDBA140SL-HF replace SS14-TP in all applications?

A: CDBA140SL-HF has higher current rating (1.4 A) and lower forward voltage (330 mV @ 1 A), making it electrically superior for most applications. However, its maximum junction temperature is limited to 100°C compared to SS14-TP's 125°C. Verify thermal requirements before substitution.

Q: Is the SS14 part from SMC Diode Solutions a suitable substitute?

A: No. Although SS14 shares the same package (DO-214AC, SMA), it has different electrical specifications (100 V reverse voltage vs. 40 V, 850 mV forward voltage vs. 600 mV). This part is not suitable for 40 V applications.

Q: What does "Not For New Designs" mean for RB160L-40TE25 and RB056L-40TE25?

A: "Not For New Designs" indicates the manufacturer has discontinued active development and recommends against using these parts in new product designs. These parts may have limited future availability and support. Use active status parts for new applications.

Q: Can PMEG4010ETR,115 be used in high-temperature applications?

A: Yes. PMEG4010ETR,115 has the highest maximum junction temperature (175°C) among all listed substitutes, making it suitable for elevated temperature environments. It maintains 40 V, 1 A specifications but uses SOD-123W package, requiring PCB layout changes.

Q: Are all listed parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and have MSL rating of 1 (Unlimited), matching the environmental compliance profile of SS14-TP.

Q: What is the significance of reverse recovery time (trr) listed for PMEG4010ETR,115?

A: Reverse recovery time (4.4 ns) indicates the speed at which the diode transitions from forward to reverse bias. Lower trr values reduce switching losses and are beneficial in high-frequency switching applications. This parameter is not specified for SS14-TP but is provided for PMEG4010ETR,115 as additional performance data.

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