1SMB5913B-13 Equivalent & Substitute Parts

Part Overview

The 1SMB5913B-13 is a Zener diode rated at 3.3 V nominal with 550 mW maximum power dissipation in a Surface Mount SMB (DO-214AA) package. Manufactured by Diodes Incorporated, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, identification of functionally equivalent substitute parts is necessary for ongoing design support and production continuity.

Substiute Parts

1SMB5913B-13

Diodes IncorporatedIn Stock: 9161SMB5913B-13 Datasheet

Current PartRFQ

1SMB5913BT3G

onsemiIn Stock: 403541SMB5913BT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1SMB5913B-13 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Zener voltage: 3.3 V nominal
• Tolerance: ±5%
• Impedance (Max): 10 Ohms
• Current - Reverse Leakage @ Vr: 100 µA @ 1 V
• Voltage - Forward (Vf) (Max) @ If: 1.5 V @ 200 mA
• Operating Temperature Range: -65°C ~ 150°C

Mechanical Compatibility Requirements:

• Mounting Type: Surface Mount
• Package / Case: DO-214AA, SMB

Regulatory Compliance Requirements:

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The 1SMB5913BT3G manufactured by onsemi meets all electrical and mechanical parameters specified for the 1SMB5913B-13. The substitute part maintains identical zener voltage, tolerance, impedance, reverse leakage characteristics, forward voltage characteristics, and operating temperature range. Both components utilize the same SMB package footprint and satisfy equivalent regulatory compliance standards.

Parameter Comparison

Engineering Selection Recommendations

The 1SMB5913BT3G is the direct substitute for the obsolete 1SMB5913B-13. Selection of this substitute part is supported by the following factors:

Compliance and Availability: The 1SMB5913BT3G maintains ROHS3 compliance and carries an active product status with substantial inventory availability (40,300 pcs), ensuring long-term supply continuity compared to the obsolete 1SMB5913B-13.

Electrical Performance: All critical electrical parameters are identical between the main part and substitute, including zener voltage, tolerance, impedance, reverse leakage, forward voltage characteristics, and operating temperature range. The substitute's maximum power rating of 3 W exceeds the original 550 mW specification, providing enhanced thermal margin without altering circuit behavior.

Physical Compatibility: Both components share identical SMB (DO-214AA) package geometry and surface mount configuration, enabling direct PCB footprint compatibility without layout modification.

Regulatory Status: The substitute part is ROHS3 compliant and carries an active ECCN classification (EAR99), eliminating the regulatory constraints associated with the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the 1SMB5913BT3G be used as a direct replacement for the 1SMB5913B-13 without circuit modification?

A: Yes. The 1SMB5913BT3G is electrically and mechanically compatible with the 1SMB5913B-13. All critical parameters including zener voltage, tolerance, impedance, reverse leakage, forward voltage, and operating temperature range are identical. The SMB package footprint is unchanged, permitting direct PCB substitution.

Q: What is the significance of the higher power rating (3 W vs. 550 mW) in the substitute part?

A: The 1SMB5913BT3G's 3 W maximum power rating exceeds the original 550 mW specification. This higher rating does not alter circuit operation but provides increased thermal headroom. The component will function identically in applications designed for the original 550 mW part.

Q: Are there any compliance differences between the two parts?

A: Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The substitute part carries an active ECCN classification (EAR99) versus the obsolete status of the original part, eliminating regulatory discontinuation concerns.

Q: Does the SMB package remain the same for both parts?

A: Yes. Both the 1SMB5913B-13 and 1SMB5913BT3G utilize the DO-214AA SMB package. PCB footprints, land patterns, and mounting procedures are identical.

Q: What is the availability status of the substitute part?

A: The 1SMB5913BT3G is an active product with 40,300 pcs in stock, providing reliable long-term availability. The original 1SMB5913B-13 is obsolete with limited remaining inventory (873 pcs).

Q: Are the electrical characteristics of the zener diode identical between the two parts?

A: Yes. The zener voltage (3.3 V), tolerance (±5%), impedance (10 Ohms max), reverse leakage (100 µA @ 1 V), forward voltage (1.5 V @ 200 mA), and operating temperature range (-65°C ~ 150°C) are identical for both parts.