SS14L Equivalent & Substitute Parts

Part Overview

The SS14L is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40 V DC reverse voltage and 1 A average rectified current. The device is packaged in DO-219AB (Sub SMA) surface mount configuration and operates across a junction temperature range of -55°C to 125°C. The SS14L is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product portfolio. Identification of equivalent and substitute parts is necessary for design continuity, component sourcing, and production support for existing applications utilizing this diode.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	400	µA @ 40 V
Mounting Type	Surface Mount	—
Package / Case	DO-219AB	—
Operating Temperature - Junction	-55 to 125	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS14L is determined by electrical and mechanical parameter equivalence within the Schottky rectifier diode category. The critical parameters governing substitutability are:

Electrical Parameters:

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: 400 µA @ 40 V

Mechanical Parameters:

Mounting Type: Surface Mount
Package / Case: DO-219AB (Sub SMA)
Operating Temperature - Junction: -55°C to 125°C

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are classified into two categories:

Direct Manufacturer Equivalent (SS14L): Identical part number with identical electrical and mechanical specifications.

Parametric Equivalents (SS14L M2G, SS14L MHG, SS14L MQG, SS14L MTG, SS14L RFG, SS14L RHG, SS14L RQG, SS14L RTG): Parts with identical electrical parameters and package configuration but different manufacturing date codes or internal revision designations. These parts maintain full electrical and thermal compatibility with the original SS14L.

Manufacturer Recommended Substitute (SS14LW): Alternative package configuration (SOD-123W) with identical electrical ratings. This part differs in physical package dimensions and mounting footprint but maintains electrical parameter equivalence. The SS14LW exhibits lower reverse leakage current (100 µA @ 40 V versus 400 µA @ 40 V) and is classified as "Active" product status.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Ir @ Vr	Package	Temp Range	Product Status	Inventory
SS14L	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	≤ 500ns	400 µA @ 40 V	DO-219AB	-55 to 125°C	Not For New Designs	23321 Pcs
SS14LW	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	≤ 500ns	100 µA @ 40 V	SOD-123W	-55 to 125°C	Active	78875 Pcs
SS14L M2G	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	≤ 500ns	400 µA @ 40 V	DO-219AB	-55 to 125°C	Active	648 Pcs
SS14L MHG	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	≤ 500ns	400 µA @ 40 V	DO-219AB	-55 to 125°C	Active	1070 Pcs
SS14L MQG	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	≤ 500ns	400 µA @ 40 V	DO-219AB	-55 to 125°C	Active	929 Pcs
SS14L MTG	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	≤ 500ns	400 µA @ 40 V	DO-219AB	-55 to 125°C	Active	898 Pcs
SS14L RFG	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	≤ 500ns	400 µA @ 40 V	DO-219AB	-55 to 125°C	Active	729 Pcs
SS14L RHG	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	≤ 500ns	400 µA @ 40 V	DO-219AB	-55 to 125°C	Active	877 Pcs
SS14L RQG	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	≤ 500ns	400 µA @ 40 V	DO-219AB	-55 to 125°C	Active	870 Pcs
SS14L RTG	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	≤ 500ns	400 µA @ 40 V	DO-219AB	-55 to 125°C	Active	747 Pcs

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Footprint):

The parametric equivalent parts SS14L M2G, SS14L MHG, SS14L MQG, SS14L MTG, SS14L RFG, SS14L RHG, SS14L RQG, and SS14L RTG are fully interchangeable with the original SS14L. All parts maintain identical electrical specifications, package configuration (DO-219AB), and thermal operating range. These parts carry "Active" product status, ensuring continued manufacturer support and availability. Selection among these variants is based on inventory availability and manufacturing date code requirements.

For Package Migration (Alternative Package Configuration):

The SS14LW represents the manufacturer's recommended substitute for new designs and ongoing production. This part maintains all critical electrical parameters (40 V reverse voltage, 1 A average rectified current, 550 mV forward voltage drop) and operates across the same temperature range (-55°C to 125°C). The SS14LW is packaged in SOD-123W configuration, which differs physically from the DO-219AB package of the original SS14L. This substitution requires PCB layout modification to accommodate the different package footprint. The SS14LW exhibits superior reverse leakage characteristics (100 µA @ 40 V versus 400 µA @ 40 V), providing enhanced performance in low-leakage applications. The SS14LW carries "Active" product status with significantly higher inventory availability (78875 Pcs).

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage processes. No additional handling or environmental controls are required beyond standard component management practices.

Frequently Asked Questions (FAQ)

Q: Can SS14L M2G, SS14L MHG, SS14L MQG, SS14L MTG, SS14L RFG, SS14L RHG, SS14L RQG, and SS14L RTG be used interchangeably with the original SS14L?

A: Yes. These parts are parametric equivalents with identical electrical specifications, package configuration, and thermal characteristics. The suffix designations represent manufacturing date codes or internal revision levels and do not affect electrical performance or physical compatibility.

Q: What is the primary difference between SS14L and SS14LW?

A: The primary difference is package configuration. SS14L uses DO-219AB (Sub SMA) package, while SS14LW uses SOD-123W package. Both maintain identical electrical ratings (40 V, 1 A, 550 mV forward voltage). SS14LW exhibits lower reverse leakage current (100 µA versus 400 µA at 40 V). Package migration requires PCB layout modification.

Q: Is the SS14LW suitable for direct PCB replacement without layout changes?

A: No. The SS14LW SOD-123W package has different physical dimensions and pin spacing compared to the SS14L DO-219AB package. PCB footprint modification is required for mechanical and electrical compatibility.

Q: Why is the original SS14L marked "Not For New Designs"?

A: The "Not For New Designs" status indicates the part has been superseded in the manufacturer's product portfolio. The SS14LW is the recommended alternative for new applications. Existing designs using SS14L can continue with parametric equivalent variants (SS14L M2G, SS14L MHG, SS14L MQG, SS14L MTG, SS14L RFG, SS14L RHG, SS14L RQG, SS14L RTG) which carry "Active" status.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and are suitable for applications requiring RoHS certification.

Q: What is the moisture sensitivity level for these diodes?

A: All parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard component storage and handling practices are sufficient.

Q: Which substitute part offers the best availability?

A: SS14LW offers the highest inventory availability at 78875 Pcs. Among parametric equivalents in DO-219AB package, SS14L MHG provides the highest availability at 1070 Pcs.

Q: Can reverse leakage current differences between SS14L and SS14LW affect circuit performance?

A: Reverse leakage current differences (400 µA for SS14L versus 100 µA for SS14LW) are relevant only in applications with stringent low-leakage requirements. For standard rectification applications, both specifications are functionally equivalent. Circuit analysis should determine if the lower leakage of SS14LW provides performance benefits.

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