SA36C-B Equivalent & Substitute Parts

Part Overview

The SA36C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This bidirectional Zener diode operates with a 36V reverse standoff voltage and provides 58.1V clamping at peak pulse current. The device is packaged in a DO-204AC (DO-15) through-hole axial configuration and rated for 500W peak pulse power dissipation across an operating temperature range of -65°C to 175°C.

The SA36C-B carries an obsolete product status. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications requiring this voltage suppression specification.

Substiute Parts

SA36C-B

Littelfuse Inc.In Stock: 1111SA36C-B Datasheet

Current PartRFQ

SA36CA

Taiwan Semiconductor CorporationIn Stock: 2223SA36CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA36C-B is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 36V
• Voltage - Clamping (Max) @ Ipp: 58.1V
• Bidirectional Channels: 1
• Type: Zener

Mechanical Equivalence Criteria:

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

Performance Criteria:

• Power - Peak Pulse: 500W
• Operating Temperature Range: Minimum -55°C to 175°C

The SA36CA qualifies as a direct substitute based on identical voltage specifications, clamping characteristics, package configuration, and power rating. The substitute maintains functional compatibility within the specified electrical and thermal operating envelope.

Parameter Comparison

Engineering Selection Recommendations

SA36CA Selection Basis:

The SA36CA is a direct functional equivalent for the obsolete SA36C-B. Both devices share identical voltage specifications (36V standoff, 58.1V clamping), power rating (500W peak pulse), and package configuration (DO-204AC through-hole axial).

The SA36CA offers the following advantages for design continuity:

• Active Product Status: The SA36CA maintains active production status, ensuring long-term availability and supply chain stability compared to the obsolete SA36C-B.
• Enhanced Peak Pulse Current: The SA36CA provides 9A peak pulse current versus 8.8A for the SA36C-B, delivering improved transient suppression capability within the same power envelope.
• Regulatory Compliance: The SA36CA meets ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements.
• Identical Mechanical Interface: Through-hole DO-204AC packaging enables direct board-level substitution without PCB redesign.

Temperature Range Consideration: The SA36CA operates across -55°C to 175°C, compared to the SA36C-B range of -65°C to 175°C. Applications requiring operation below -55°C require thermal analysis to confirm compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SA36CA replace the SA36C-B in existing designs?

A: Yes. The SA36CA provides electrical and mechanical equivalence across all critical parameters: 36V standoff voltage, 58.1V clamping voltage, 500W power rating, and DO-204AC through-hole package. Direct substitution is supported without circuit modification.

Q: What is the difference in peak pulse current between these devices?

A: The SA36CA delivers 9A peak pulse current compared to 8.8A for the SA36C-B. This represents a 2.3% increase in transient suppression capability. Both devices operate within the same 500W power envelope, making the SA36CA suitable for applications requiring the SA36C-B specification.

Q: Are there packaging differences between SA36C-B and SA36CA?

A: Both devices use identical DO-204AC (DO-15) axial through-hole packaging. No PCB layout modifications are required for substitution. The SA36CA is supplied in Tape & Reel (TR) format, while the SA36C-B was supplied in standard packaging.

Q: Does the operating temperature range difference affect substitution?

A: The SA36CA operates from -55°C to 175°C, while the SA36C-B operates from -65°C to 175°C. For applications operating above -55°C, the SA36CA is fully equivalent. Applications requiring operation below -55°C require verification that the narrower temperature range does not impact system performance.

Q: What regulatory compliance certifications apply to the SA36CA?

A: The SA36CA meets ROHS3 compliance and is REACH unaffected. Both certifications satisfy current environmental and regulatory requirements for electronic component procurement.

Q: Is the SA36CA available in the same quantities as the SA36C-B?

A: The SA36CA maintains higher inventory availability (2200 pcs) compared to the SA36C-B (1082 pcs), supporting consistent supply for production requirements.