1SMB5953B-13 Equivalent & Substitute Parts

Part Overview

The 1SMB5953B-13 is an active-status zener diode manufactured by Diodes Incorporated, rated for 150 V nominal zener voltage with 3 W maximum power dissipation in a surface mount SMB package. This component is designed for voltage regulation and transient protection applications requiring stable reverse-bias operation across industrial temperature ranges. Substitute parts are identified based on matching electrical specifications and mechanical compatibility to ensure functional equivalence in circuit applications.

Substiute Parts

1SMB5953B-13

Diodes IncorporatedIn Stock: 19291SMB5953B-13 Datasheet

Current PartRFQ

1SMB5953BT3G

onsemiIn Stock: 304751SMB5953BT3G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1SMB5953B-13 are identified through parametric equivalence. The following electrical and mechanical parameters must match exactly to establish functional substitution:

• Voltage - Zener (Nom): 150 V
• Tolerance: ±5%
• Power - Max: 3 W
• Impedance (Max): 600 Ohms
• Current - Reverse Leakage @ Vr: 1 µA @ 114 V
• Voltage - Forward (Vf) (Max) @ If: 1.5 V @ 200 mA
• Operating Temperature Range: -65°C to 150°C
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

The 1SMB5953BT3G from onsemi meets all specified electrical parameters and mechanical requirements, establishing it as a parametric equivalent. Packaging format differences (Tape & Reel versus Cut Tape & Digi-Reel) do not affect electrical performance or circuit compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the 1SMB5953B-13 and 1SMB5953BT3G are active-status components with identical electrical specifications and regulatory compliance. Selection between these parts is based on supply chain availability and packaging format requirements:

• 1SMB5953B-13 (Diodes Incorporated): 1900 units in stock, supplied in Tape & Reel format
• 1SMB5953BT3G (onsemi): 30400 units in stock, supplied in Cut Tape & Digi-Reel format

Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level 1 (unlimited) indicates no special storage or handling requirements. The choice between manufacturers and packaging formats does not affect circuit performance, thermal characteristics, or regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 1SMB5953BT3G replace the 1SMB5953B-13 in existing designs?

A: Yes. Both parts share identical electrical parameters, operating temperature range, and package specifications. Direct substitution is supported without circuit modification.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Packaging format affects handling and assembly processes but does not alter electrical performance or component functionality. Tape & Reel is continuous reel format; Cut Tape & Digi-Reel provides pre-cut tape segments. Both formats contain the same SMB package component.

Q: Are there compliance differences between the two manufacturers?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings. Regulatory status is equivalent.

Q: What parameters must match for zener diode substitution?

A: Zener voltage (150 V), tolerance (±5%), maximum power (3 W), impedance (600 Ohms), reverse leakage current (1 µA @ 114 V), forward voltage (1.5 V @ 200 mA), operating temperature range (-65°C to 150°C), and package type (DO-214AA, SMB) must all match exactly.

Q: Is the 1SMB5953 base product number significant for substitution?

A: Yes. Both the 1SMB5953B-13 and 1SMB5953BT3G share the same base product number (1SMB5953), indicating they are part of the same electrical specification family and are parametrically equivalent.