SA14-B Equivalent & Substitute Parts

Part Overview

The SA14-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 14V reverse standoff voltage with a 23.2V maximum clamping voltage and 22A peak pulse current rating in a through-hole DO-204AC (DO-15) axial package. The SA14-B is classified as obsolete, necessitating identification of equivalent substitute components that maintain identical electrical and mechanical specifications for continued system support and new design implementations.

Substiute Parts

SA14-B

Littelfuse Inc.In Stock: 1088SA14-B Datasheet

Current PartRFQ

SA14A

Fairchild SemiconductorIn Stock: 300422SA14A Datasheet

DirectRFQ

SA14A-B

Littelfuse Inc.In Stock: 1145SA14A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SA14-B TVS diode are qualified based on strict electrical and mechanical parameter matching. The substitution criteria are:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 14V
• Voltage - Breakdown (Min): 15.6V
• Voltage - Clamping (Max) @ Ipp: 23.2V
• Current - Peak Pulse (10/1000µs): 22A
• Power - Peak Pulse: 500W
• Type: Zener
• Unidirectional Channels: 1

Mechanical Parameters (Must Match):

• Package / Case: DO-204AC (DO-15)
• Mounting Type: Through Hole

The identified substitute parts SA14A and SA14A-B meet all specified electrical and mechanical requirements and are therefore direct functional equivalents for the obsolete SA14-B component.

Parameter Comparison

Engineering Selection Recommendations

SA14A-B (Littelfuse Inc.) is the primary substitute for the obsolete SA14-B. This component is classified as Active product status, ensuring continued availability and manufacturer support. The SA14A-B maintains identical electrical specifications and package configuration while offering ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for new designs and legacy system support.

SA14A (Fairchild Semiconductor) is a secondary substitute option. While electrically equivalent to the SA14-B, this component is also classified as Obsolete. The SA14A operates across a reduced temperature range (-55°C to 175°C versus -65°C to 175°C), which may limit suitability for applications requiring extended low-temperature performance.

For new designs and ongoing production, SA14A-B is the recommended selection due to its Active status and full regulatory compliance. For legacy system maintenance where component availability is critical, SA14A serves as an alternative equivalent, provided the reduced minimum operating temperature does not conflict with application requirements.

Frequently Asked Questions (FAQ)

Q: Can SA14A or SA14A-B be used as direct replacements for SA14-B in existing designs?

A: Yes. Both SA14A and SA14A-B are direct electrical and mechanical equivalents. All three components share identical voltage ratings (14V standoff, 23.2V clamping), current ratings (22A peak pulse), power dissipation (500W), and package configuration (DO-204AC through-hole axial). Pin-for-pin and footprint compatibility is confirmed.

Q: What is the difference between SA14A and SA14A-B?

A: The primary differences are manufacturer and product status. SA14A is manufactured by Fairchild Semiconductor and is Obsolete. SA14A-B is manufactured by Littelfuse Inc. and is Active. Both meet identical electrical specifications. SA14A operates at a minimum temperature of -55°C, while SA14A-B operates at -65°C. For applications requiring the full -65°C minimum temperature range, SA14A-B is required.

Q: Are there any compliance or certification differences between these parts?

A: SA14-B and SA14A-B are both RoHS Compliant (RoHS3). SA14A is ROHS3 Compliant. SA14A-B includes REACH Unaffected status. All three components carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. Moisture Sensitivity Level is 1 (Unlimited) for SA14-B and SA14A-B.

Q: Which substitute should be selected for new production designs?

A: SA14A-B is the recommended selection for new designs. This component is Active product status, ensuring long-term availability and manufacturer support. It maintains full electrical equivalence to SA14-B while offering current regulatory compliance and extended low-temperature operating range.

Q: Can SA14A be used if SA14A-B is unavailable?

A: SA14A is electrically equivalent and mechanically compatible. However, verify that the reduced minimum operating temperature (-55°C versus -65°C) does not conflict with application requirements. SA14A is Obsolete, which may impact long-term availability.