1SMB5914B-13 Equivalent & Substitute Parts

Part Overview

The 1SMB5914B-13 is a Zener diode rated at 3.6 V nominal with 550 mW maximum power dissipation in a Surface Mount SMB (DO-214AA) package. This component is classified as Obsolete, indicating it is no longer in active production. The availability of equivalent substitute parts is necessary to support ongoing design requirements, maintenance operations, and new production builds where this specification remains applicable.

Substiute Parts

1SMB5914B-13

Diodes IncorporatedIn Stock: 9281SMB5914B-13 Datasheet

Current PartRFQ

1SMB5914BT3G

onsemiIn Stock: 422391SMB5914BT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1SMB5914B-13 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Zener voltage (Vz) must be 3.6 V nominal with ±5% tolerance
• Impedance (Zzt) maximum of 9 Ohms
• Reverse leakage current of 75 µA @ 1 V
• Forward voltage (Vf) maximum of 1.5 V @ 200 mA
• Operating temperature range of -65°C to 150°C

Mechanical & Package Equivalence Requirements:

• Surface Mount mounting type
• DO-214AA / SMB package configuration
• RoHS3 compliance
• Moisture Sensitivity Level 1 (Unlimited)

The substitute part 1SMB5914BT3G meets all electrical and mechanical equivalence criteria. The primary distinction is the maximum power rating (3 W versus 550 mW), which represents an enhancement rather than a limitation, making this part suitable for applications requiring the specified 3.6 V Zener characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 1SMB5914BT3G manufactured by onsemi is the qualified substitute for the obsolete 1SMB5914B-13. Selection of this substitute is based on the following engineering criteria:

Product Status Justification: The main part (1SMB5914B-13) carries Obsolete status, making it unavailable for new production. The substitute part (1SMB5914BT3G) maintains Active product status with confirmed inventory availability (42,200 pieces), ensuring supply chain continuity.

Compliance & Certification: Both parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), ensuring compatibility with current manufacturing and storage requirements. The substitute part carries REACH Unaffected status with ECCN classification EAR99, compared to the main part's REACH Affected status.

Electrical & Mechanical Compatibility: All critical electrical parameters are identical: 3.6 V nominal Zener voltage, ±5% tolerance, 9 Ohms maximum impedance, 75 µA reverse leakage, and 1.5 V forward voltage. The operating temperature range (-65°C to 150°C) and SMB package configuration are fully compatible. The enhanced power rating (3 W versus 550 mW) provides additional thermal margin without affecting circuit operation.

Frequently Asked Questions (FAQ)

Q: Can the 1SMB5914BT3G be used as a direct replacement for the 1SMB5914B-13?

A: Yes. The 1SMB5914BT3G meets all electrical and mechanical specifications of the 1SMB5914B-13. Both parts share identical Zener voltage (3.6 V), tolerance (±5%), impedance (9 Ohms maximum), reverse leakage (75 µA @ 1 V), forward voltage (1.5 V @ 200 mA), operating temperature range (-65°C to 150°C), and SMB package configuration. The substitute part is electrically and mechanically compatible for direct substitution.

Q: What is the difference in power rating between these parts?

A: The 1SMB5914B-13 is rated at 550 mW maximum power dissipation, while the 1SMB5914BT3G is rated at 3 W maximum power dissipation. This difference represents an enhancement in the substitute part. The higher power rating provides additional thermal capability without changing the Zener voltage or other electrical characteristics.

Q: Are there any compliance differences between the main part and substitute?

A: Both parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). The substitute part (1SMB5914BT3G) carries REACH Unaffected status and ECCN classification EAR99, whereas the main part (1SMB5914B-13) carries REACH Affected status. These compliance differences do not affect electrical or mechanical compatibility.

Q: Why is the main part classified as Obsolete?

A: The 1SMB5914B-13 is no longer in active production by Diodes Incorporated. The 1SMB5914BT3G from onsemi is the active equivalent that maintains the same electrical specifications and package configuration, ensuring continued availability for applications requiring 3.6 V Zener diodes in SMB packages.

Q: Are the packaging options different between these parts?

A: The main part (1SMB5914B-13) does not specify a packaging option in the provided data. The substitute part (1SMB5914BT3G) is available in Cut Tape (CT) and Digi-Reel® packaging. Both parts use the DO-214AA / SMB package configuration for the component itself.

Q: Can I use the 1SMB5914BT3G in existing designs without modification?

A: Yes. The 1SMB5914BT3G is a direct electrical and mechanical equivalent. No circuit modifications are required. The identical Zener voltage, tolerance, impedance, leakage current, forward voltage, operating temperature range, and SMB package ensure compatibility with existing PCB layouts and circuit designs.