SMA5C39-TP Equivalent & Substitute Parts

Part Overview

The SMA5C39-TP is a Zener diode rated at 39 V nominal with 3 W maximum power dissipation in a surface mount DO-214AC (SMA) package. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and procurement needs. The part is manufactured by Micro Commercial Co and is ROHS3 compliant with unlimited moisture sensitivity rating.

Substiute Parts

SMA5C39-TP

Micro Commercial CoIn Stock: 789SMA5C39-TP Datasheet

Current PartRFQ

3SMAJ5939B-TP

Micro Commercial CoIn Stock: 53103SMAJ5939B-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMA5C39-TP is determined by the following critical parameters:

• Zener Voltage: 39 V nominal specification
• Power Rating: 3 W maximum dissipation capability
• Package Type: DO-214AC (SMA) surface mount form factor
• Compliance: ROHS3 compliance and MSL rating
• Operating Temperature: Functional range within specified limits

The substitute part 3SMAJ5939B-TP meets these core requirements. Both parts share identical nominal zener voltage (39 V), maximum power rating (3 W), and package configuration (DO-214AC, SMA). The substitute part is currently in active production status, addressing the obsolescence of the original component.

Parameter Comparison

Engineering Selection Recommendations

The 3SMAJ5939B-TP is the direct substitute for the obsolete SMA5C39-TP based on electrical and mechanical equivalence. Both components are ROHS3 compliant and carry MSL rating 1 (unlimited moisture sensitivity). The substitute part is in active production status, ensuring long-term availability and supply chain continuity.

The 3SMAJ5939B-TP exhibits tighter zener voltage tolerance (±5% versus ±5.13%), lower maximum impedance (45 Ohms versus 50 Ohms), and slightly higher forward voltage drop (1.5 V versus 1.2 V at 200 mA). The operating temperature range of the substitute part is -55°C to 150°C, compared to -65°C to 150°C for the original part. These parameter variations remain within acceptable substitution criteria for 39 V, 3 W zener diode applications in DO-214AC packaging.

Frequently Asked Questions (FAQ)

Q: Can the 3SMAJ5939B-TP directly replace the SMA5C39-TP in existing designs?

A: Yes. Both parts share identical nominal zener voltage (39 V), maximum power rating (3 W), and DO-214AC (SMA) package configuration. Electrical and mechanical compatibility is established through parameter equivalence.

Q: What is the primary reason for substitution?

A: The SMA5C39-TP is classified as obsolete. The 3SMAJ5939B-TP is an active production equivalent that provides continued component availability.

Q: Are there differences in operating temperature ranges?

A: The SMA5C39-TP operates from -65°C to 150°C, while the 3SMAJ5939B-TP operates from -55°C to 150°C. Applications requiring operation below -55°C must evaluate this parameter difference.

Q: How do the impedance specifications compare?

A: The SMA5C39-TP specifies maximum impedance of 50 Ohms, while the 3SMAJ5939B-TP specifies 45 Ohms. The lower impedance of the substitute part is compatible with applications designed for the original component.

Q: Are both parts RoHS compliant?

A: Yes. Both the SMA5C39-TP and 3SMAJ5939B-TP are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity).

Q: What packaging options are available for the substitute part?

A: The 3SMAJ5939B-TP is supplied in Cut Tape (CT) packaging, compared to the original part's unspecified packaging format. Both use identical DO-214AC (SMA) component packaging.