SS14HE Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS14HE is a 40V, 1A Schottky rectifier diode manufactured by onsemi in SOD-323HE surface mount packaging. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. The part remains in stock with 23,100 units available. Due to its discontinued design status, equivalent and substitute parts are necessary for ongoing production support, maintenance applications, and design transitions to active alternatives.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) Maximum @ If	550 mV @ 1 A	mV
Reverse Recovery Time (trr)	5.6	ns
Current - Reverse Leakage @ Vr	50	µA @ 40 V
Capacitance @ Vr, F	55	pF @ 4V, 1MHz
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
Mounting Type	Surface Mount	—
Package / Case	SOD-323HE	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS14HE is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) Maximum: 40 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) Maximum @ If: 550 mV @ 1 A
Technology: Schottky
Operating Temperature - Junction: -55°C to 150°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Package Considerations: Substitute parts are grouped into two categories based on package type:

SOD-323HE Package Equivalents — Direct mechanical and electrical equivalents with identical package footprint
Alternative Package Equivalents — Parts with different package types (SOD-123HE, MicroSMP, Micro SMA) that maintain electrical specifications but require PCB layout modification

All substitute parts listed maintain the core electrical performance parameters and environmental compliance requirements of the original SS14HE.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	trr [ns]	Ir @ Vr [µA]	C @ Vr [pF]	Package	Product Status	Inventory [Pcs]
SS14HE	onsemi	40	1	550 @ 1 A	5.6	50 @ 40 V	55 @ 4V, 1MHz	SOD-323HE	Not For New Designs	23,100
NRVBSS14HE	onsemi	40	1	550 @ 1 A	5.6	50 @ 40 V	55 @ 4V, 1MHz	SOD-323HE	Not For New Designs	5,399
SS14M RSG	Taiwan Semiconductor Corporation	40	1	550 @ 1 A	—	50 @ 40 V	50 @ 4V, 1MHz	Micro SMA	Active	2,370
SS14MH	Taiwan Semiconductor Corporation	40	1	550 @ 1 A	—	50 @ 40 V	50 @ 4V, 1MHz	Micro SMA	Active	4,399
MSS1P4-M3/89A	Vishay General Semiconductor - Diodes Division	40	1	550 @ 1 A	—	200 @ 40 V	50 @ 4V, 1MHz	MicroSMP (DO-219AD)	Active	90,600
SS1040HE_R1_00001	Panjit International Inc.	40	1	550 @ 1 A	—	30 @ 40 V	155 @ 0V, 1MHz	SOD-123HE	Active	4,200

Engineering Selection Recommendations

Direct Replacement (Same Package):

NRVBSS14HE is the primary parametric equivalent to SS14HE. Both parts are manufactured by onsemi, share identical SOD-323HE packaging, and maintain matching electrical specifications across all critical parameters. NRVBSS14HE includes AEC-Q101 automotive qualification, providing enhanced reliability documentation. Both parts carry "Not For New Designs" status, indicating they are suitable for legacy system support and maintenance applications only.

Active Product Alternatives (Different Packages):

For new designs or long-term production planning, the following active-status alternatives are available:

SS14M RSG and SS14MH (Taiwan Semiconductor Corporation) — Both maintain identical electrical specifications with Micro SMA packaging. SS14MH includes AEC-Q101 automotive qualification. These parts require PCB layout modification due to package change from SOD-323HE to Micro SMA.
MSS1P4-M3/89A (Vishay) — Active product with MicroSMP packaging. Electrical specifications match the SS14HE with the exception of reverse leakage current (200 µA versus 50 µA at 40V). This part offers the highest inventory availability (90,600 units) and is suitable for applications where elevated leakage current is acceptable.
SS1040HE_R1_00001 (Panjit) — Active product with SOD-123HE packaging. Maintains core electrical specifications but exhibits higher capacitance (155 pF at 0V versus 55 pF at 4V) and lower reverse leakage current (30 µA). Package change from SOD-323HE to SOD-123HE requires PCB redesign.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and REACH Unaffected status, matching the environmental and regulatory requirements of the original SS14HE.

Frequently Asked Questions (FAQ)

Q: Can NRVBSS14HE be used as a direct replacement for SS14HE?

A: Yes. NRVBSS14HE is a parametric equivalent manufactured by onsemi with identical electrical specifications and SOD-323HE packaging. No PCB layout modification is required. Both parts are classified as "Not For New Designs," indicating suitability for legacy system support.

Q: What is the difference between SS14M RSG and SS14MH?

A: Both parts are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications and Micro SMA packaging. SS14MH includes AEC-Q101 automotive qualification, while SS14M RSG does not. Selection depends on automotive compliance requirements for the application.

Q: Why does MSS1P4-M3/89A have higher reverse leakage current (200 µA) compared to SS14HE (50 µA)?

A: MSS1P4-M3/89A is manufactured by Vishay using MicroSMP packaging technology. The elevated reverse leakage current is a characteristic of this package variant. This part remains functionally equivalent for applications where reverse leakage current within 200 µA at 40V is acceptable.

Q: Can SS1040HE_R1_00001 be used in place of SS14HE without PCB modification?

A: No. SS1040HE_R1_00001 uses SOD-123HE packaging, which has a different footprint than the SOD-323HE package of SS14HE. PCB layout redesign is required. This part is manufactured by Panjit and carries active product status.

Q: Which substitute part has the best inventory availability?

A: MSS1P4-M3/89A (Vishay) has the highest inventory with 90,600 units in stock. This part is suitable for high-volume production planning and offers long-term supply security.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the environmental compliance of the original SS14HE.

Q: What is the primary reason to transition from SS14HE to an alternative part?

A: SS14HE is classified as "Not For New Designs," indicating end-of-life status. For new product development, active-status alternatives such as SS14M RSG, SS14MH, MSS1P4-M3/89A, or SS1040HE_R1_00001 are recommended to ensure long-term supply availability and manufacturer support.

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