FLLD258TA Equivalent & Substitute Parts

Part Overview

The FLLD258TA is a diode array with 1 pair common cathode configuration rated for 100V DC reverse voltage and 250mA average rectified current per diode. Manufactured by Diodes Incorporated, this component is packaged in SOT-23-3 (TO-236-3, SC-59) surface mount format. The FLLD258TA is classified as obsolete product status, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating modern RoHS compliance requirements.

Substiute Parts

FLLD258TA

Diodes IncorporatedIn Stock: 4395FLLD258TA Datasheet

Current PartRFQ

MMBD7000HC-7-F

Diodes IncorporatedIn Stock: 20501MMBD7000HC-7-F Datasheet

MFR RecommendedRFQ

BAV70,215

Nexperia USA Inc.In Stock: 9396BAV70,215 Datasheet

MFR RecommendedRFQ

BAV70,235

Nexperia USA Inc.In Stock: 116037BAV70,235 Datasheet

MFR RecommendedRFQ

PMBD7100,215

Nexperia USA Inc.In Stock: 4345PMBD7100,215 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FLLD258TA is determined by strict electrical and mechanical compatibility across the following parameters:

Critical Compatibility Parameters:

• Diode Configuration: 1 Pair Common Cathode (all substitutes maintain this configuration)
• Voltage - DC Reverse (Vr) (Max): 100 V (all substitutes rated at 100 V)
• Package / Case: TO-236-3, SC-59, SOT-23-3 (all substitutes use identical package)
• Mounting Type: Surface Mount (all substitutes are surface mount)
• Technology: Standard (all substitutes use standard diode technology)

Current Rating Considerations: The FLLD258TA is rated for 250mA average rectified current per diode. Substitute parts are grouped based on current capacity:

• MMBD7000HC-7-F: 300mA (DC) - exceeds FLLD258TA rating
• BAV70,215 and BAV70,235: 215mA (DC) - below FLLD258TA rating
• PMBD7100,215: 215mA (DC) - below FLLD258TA rating

Thermal and Compliance Considerations: All substitute parts are active product status with RoHS3 compliance, addressing the obsolescence and compliance limitations of the FLLD258TA. Operating temperature ranges and reverse recovery times vary across substitutes but remain within fast recovery classification.

Parameter Comparison

Engineering Selection Recommendations

MMBD7000HC-7-F (Diodes Incorporated)

The MMBD7000HC-7-F is the primary manufacturer-recommended substitute from Diodes Incorporated. This part maintains identical voltage and package specifications while providing 300mA current capacity, exceeding the FLLD258TA requirement of 250mA. The MMBD7000HC-7-F is active product status with RoHS3 compliance, addressing obsolescence concerns. Forward voltage is reduced to 1.25V at 150mA, and reverse recovery time is significantly improved to 4ns. Operating temperature range extends to -65°C minimum. This substitute is suitable for direct replacement in applications where the higher current rating and improved performance characteristics are acceptable.

BAV70,235 (Nexperia USA Inc.)

The BAV70,235 is supplied in Tape & Reel packaging with the highest inventory availability (116,000 pcs). This part maintains 100V voltage rating and SOT-23-3 package compatibility. Current rating is 215mA (DC), below the FLLD258TA specification of 250mA. The BAV70,235 is active product status with RoHS3 compliance. This substitute is applicable in applications where current requirements do not exceed 215mA and where Nexperia sourcing is preferred.

BAV70,215 (Nexperia USA Inc.)

The BAV70,215 is supplied in Cut Tape and Digi-Reel packaging. Electrical specifications are identical to BAV70,235 with 215mA current rating and 100V voltage rating. This part is active product status with RoHS3 compliance. Selection between BAV70,215 and BAV70,235 is determined by packaging and supply chain requirements.

PMBD7100,215 (Nexperia USA Inc.)

The PMBD7100,215 is supplied in Tape & Reel packaging with 4,300 pcs inventory. Current rating is 215mA (DC), below the FLLD258TA specification. Reverse leakage current is specified at 2.5µA at 100V. This part is active product status with RoHS3 compliance. Selection is appropriate for applications where current requirements do not exceed 215mA.

Frequently Asked Questions (FAQ)

Q: Can MMBD7000HC-7-F directly replace FLLD258TA in all applications?

A: The MMBD7000HC-7-F maintains identical voltage (100V) and package (SOT-23-3) specifications. The higher current rating (300mA vs. 250mA) and improved reverse recovery time (4ns vs. 400ns) are compatible with FLLD258TA applications. Electrical performance is enhanced rather than degraded. Direct replacement is supported from an electrical and mechanical standpoint.

Q: Why do BAV70,215, BAV70,235, and PMBD7100,215 have lower current ratings than FLLD258TA?

A: These parts are rated for 215mA average rectified current, which is below the FLLD258TA specification of 250mA. These substitutes are applicable only in applications where the actual circuit current requirement does not exceed 215mA. Circuit design review is necessary to confirm current compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All four substitute parts (MMBD7000HC-7-F, BAV70,215, BAV70,235, and PMBD7100,215) are RoHS3 compliant. The FLLD258TA is RoHS non-compliant. Substitution addresses regulatory compliance requirements for new designs and production.

Q: What is the difference between BAV70,215 and BAV70,235?

A: Both parts are electrically identical with 215mA current rating and 100V voltage specification. The primary difference is packaging: BAV70,215 is supplied in Cut Tape and Digi-Reel format, while BAV70,235 is supplied in Tape & Reel format. BAV70,235 has significantly higher inventory availability (116,000 pcs vs. 9,300 pcs).

Q: Does the improved reverse recovery time of substitute parts affect circuit design?

A: The substitute parts feature reverse recovery times of 4ns compared to the FLLD258TA specification of 400ns. This improvement is beneficial for high-frequency switching applications and does not introduce compatibility issues. Circuits designed for the FLLD258TA will operate with equal or improved performance using substitute parts with faster recovery characteristics.

Q: What is the operating temperature range difference between substitutes?

A: MMBD7000HC-7-F operates from -65°C to 150°C, extending the minimum temperature by 10°C compared to FLLD258TA (-55°C to 150°C). BAV70,215, BAV70,235, and PMBD7100,215 specify 150°C maximum junction temperature without explicit minimum temperature. All substitutes support the FLLD258TA maximum operating temperature of 150°C.

Q: Is the forward voltage difference between FLLD258TA and substitutes significant?

A: The FLLD258TA specifies 1.4V forward voltage at 200mA, while all substitutes specify 1.25V at 150mA. The lower forward voltage in substitutes reduces power dissipation and heat generation. This characteristic is advantageous and does not introduce compatibility concerns.

Q: Can PMBD7100,215 be used instead of MMBD7000HC-7-F?

A: Both parts maintain 100V voltage and SOT-23-3 package compatibility. However, PMBD7100,215 is rated for 215mA current while MMBD7000HC-7-F is rated for 300mA. Selection depends on actual circuit current requirements. If the application requires current capacity above 215mA, MMBD7000HC-7-F is the appropriate choice.