1SMB5936B-13 Equivalent & Substitute Parts

Part Overview

The 1SMB5936B-13 is an active surface mount Zener diode manufactured by Diodes Incorporated, rated for 30 V nominal Zener voltage with 550 mW maximum power dissipation. This component is packaged in the DO-214AA SMB form factor and is supplied on Tape & Reel (TR). The part is ROHS3 compliant and carries an unlimited moisture sensitivity level (MSL 1), making it suitable for standard manufacturing environments without special handling requirements. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications requiring 30 V Zener diodes in SMB packaging.

Substiute Parts

1SMB5936B-13

Diodes IncorporatedIn Stock: 82181SMB5936B-13 Datasheet

Current PartRFQ

1SMB5936BT3G

onsemiIn Stock: 950701SMB5936BT3G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1SMB5936B-13 is determined by strict equivalence across the following critical parameters:

Zener Voltage (Vz): Both the main part and substitute must maintain 30 V nominal Zener voltage with ±5% tolerance to ensure voltage regulation performance in the target circuit.

Impedance (Zzt): Maximum impedance of 28 Ohms must be matched to preserve dynamic impedance characteristics and transient response.

Reverse Leakage Current: 1 µA @ 22.8 V specification ensures equivalent leakage behavior under reverse bias conditions.

Forward Voltage (Vf): 1.5 V maximum @ 200 mA forward current must be maintained for consistent forward conduction characteristics.

Operating Temperature Range: -65°C to 150°C operating window must be supported by the substitute to ensure reliability across the full application temperature spectrum.

Package and Mounting: Both parts must use DO-214AA SMB surface mount packaging to ensure mechanical and electrical compatibility with printed circuit board layouts and reflow soldering processes.

Compliance Standards: RoHS3 compliance and MSL 1 rating are required to meet manufacturing and environmental standards.

The substitute part 1SMB5936BT3G, manufactured by onsemi, meets all these critical parameters. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and maximum power rating (3 W versus 550 mW), with the higher power rating of the substitute providing additional thermal margin without affecting electrical performance at the specified operating point.

Parameter Comparison

Engineering Selection Recommendations

The 1SMB5936BT3G manufactured by onsemi is a direct functional substitute for the 1SMB5936B-13. Both parts are active products with ROHS3 compliance and MSL 1 rating, confirming current manufacturing support and environmental standard adherence.

Electrical Equivalence: All critical electrical parameters—Zener voltage, impedance, reverse leakage, forward voltage, and operating temperature range—are identical between the two parts. This ensures drop-in compatibility for voltage regulation and transient suppression applications.

Thermal Margin: The onsemi substitute carries a 3 W maximum power rating compared to the 550 mW rating of the Diodes Incorporated part. This higher power capability provides additional thermal headroom in applications approaching the original part's power dissipation limits, without introducing any electrical performance changes at standard operating points.

Packaging Consideration: The substitute is supplied in Cut Tape & Digi-Reel format rather than standard Tape & Reel. This difference affects procurement and assembly logistics but does not impact electrical or mechanical compatibility on the printed circuit board.

Supply Chain: The onsemi part carries significantly higher inventory availability (94,970 pieces versus 8,126 pieces), supporting consistent supply for high-volume production requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1SMB5936BT3G replace the 1SMB5936B-13 in existing designs without circuit modification?

A: Yes. Both parts share identical Zener voltage (30 V), impedance (28 Ohms), reverse leakage (1 µA @ 22.8 V), forward voltage (1.5 V @ 200 mA), and operating temperature range (-65°C to 150°C). The DO-214AA SMB package dimensions and pinout are identical, enabling direct substitution on the printed circuit board.

Q: What is the significance of the higher 3 W power rating on the onsemi part?

A: The 1SMB5936BT3G is rated for 3 W maximum power dissipation compared to 550 mW on the 1SMB5936B-13. This higher rating does not change electrical performance at the circuit operating point but provides additional thermal capacity. Applications operating near the 550 mW limit of the original part benefit from the increased margin without requiring circuit redesign.

Q: Are there differences in packaging that affect assembly?

A: The 1SMB5936B-13 is supplied on standard Tape & Reel (TR), while the 1SMB5936BT3G uses Cut Tape & Digi-Reel format. Both formats are compatible with standard surface mount assembly equipment. The difference is primarily in procurement and tape handling; no changes to reflow soldering parameters or board layout are required.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 1SMB5936B-13 and 1SMB5936BT3G are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level). Both carry REACH Unaffected status and EAR99 export classification, ensuring equivalent regulatory and environmental compliance.

Q: Which part should be selected for new designs?

A: Selection depends on supply chain and thermal requirements. For applications with standard power dissipation profiles, either part is suitable. The onsemi 1SMB5936BT3G offers higher inventory availability and thermal margin. The Diodes Incorporated 1SMB5936B-13 is appropriate where existing supplier relationships or specific packaging formats are required.

Q: Are the electrical characteristics identical at the rated operating point?

A: Yes. At the specified operating conditions (30 V Zener voltage, 1 µA reverse leakage @ 22.8 V, 1.5 V forward voltage @ 200 mA), both parts deliver identical electrical performance. The difference in maximum power rating does not affect performance within the design operating envelope.