SS14-HF Schottky Diode 40V 1A Equivalent & Substitute Parts

Part Overview

The SS14-HF is an active Schottky rectifier diode manufactured by Comchip Technology, rated for 40V DC reverse voltage and 1A average rectified current in a surface mount DO-214AC (SMA) package. This component is designed for fast recovery applications requiring low forward voltage drop and rapid switching characteristics. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory optimization, or specific qualification standards such as automotive compliance.

Substiute Parts

SS14-HF

Comchip TechnologyIn Stock: 1226SS14-HF Datasheet

Current PartRFQ

NRVBA140NT3G

onsemiIn Stock: 22447NRVBA140NT3G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS14-HF is determined by strict equivalence across the following critical parameters:

Mandatory Matching 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)
• Package / Case: DO-214AC, SMA
• Operating Temperature - Junction: -55°C ~ 125°C
• Technology: Schottky
• Mounting Type: Surface Mount

Acceptable Variation Parameters:

• Current - Reverse Leakage @ Vr: Substitute parts may exhibit higher leakage current within the same voltage and temperature rating, provided the part remains functionally equivalent in the application circuit.
• Capacitance @ Vr, F: Not specified for substitute part; absence of this parameter does not disqualify substitution if all other parameters match.

The NRVBA140NT3G from onsemi meets all mandatory matching parameters and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

SS14-HF (Comchip Technology):

• Active product status with 1140 pcs in stock
• ROHS3 compliant
• Suitable for general industrial and consumer applications
• Lower reverse leakage current (300 µA @ 40 V)

NRVBA140NT3G (onsemi):

• Active product status with 22395 pcs in stock
• ROHS3 compliant
• AEC-Q101 automotive qualification
• Automotive-grade component suitable for automotive and mission-critical applications
• Higher reverse leakage current (500 µA @ 40 V)
• REACH Unaffected status

Selection between these parts is determined by application requirements and supply chain considerations. The NRVBA140NT3G is appropriate for automotive applications requiring AEC-Q101 qualification. Both parts are electrically equivalent for standard industrial rectification circuits operating within the specified voltage and current ratings.

Frequently Asked Questions (FAQ)

Q: Can NRVBA140NT3G replace SS14-HF in all applications?

A: NRVBA140NT3G is a parametric equivalent with matched voltage, current, and switching speed ratings. The primary difference is higher reverse leakage current (500 µA vs. 300 µA @ 40 V). Substitution is valid for applications where reverse leakage current within this range does not affect circuit performance. Applications with strict leakage requirements should retain the SS14-HF.

Q: What is the significance of AEC-Q101 qualification on the NRVBA140NT3G?

A: AEC-Q101 is an automotive industry qualification standard. The NRVBA140NT3G meets this standard, making it suitable for automotive applications. The SS14-HF does not carry this qualification. Selection depends on whether the application requires automotive-grade components.

Q: Are the packages physically identical?

A: Both parts use the DO-214AC (SMA) surface mount package. Physical dimensions and PCB footprints are identical, enabling direct board-level substitution without layout modifications.

Q: Does the absence of capacitance data for NRVBA140NT3G affect substitution?

A: Capacitance specifications are not provided for the NRVBA140NT3G. If the application circuit requires specific capacitance characteristics, the SS14-HF with 110pF @ 4V, 1MHz should be retained. For standard rectification applications, this parameter difference is not limiting.

Q: What is the inventory advantage of NRVBA140NT3G?

A: The NRVBA140NT3G has 22395 pcs in stock compared to 1140 pcs for SS14-HF, providing greater availability for high-volume production or extended supply chain requirements.

Q: Are both parts RoHS compliant?

A: Yes, both SS14-HF and NRVBA140NT3G are ROHS3 compliant and suitable for applications requiring RoHS compliance.