BZX84-B15/LF1R Equivalent & Substitute Parts

Part Overview

The BZX84-B15/LF1R is an automotive-grade Zener diode manufactured by NXP USA Inc., rated at 15 V nominal with 250 mW power dissipation in a surface mount TO-236AB (SOT-23) package. This component is classified as Active and carries AEC-Q101 automotive qualification. Substitute parts are identified to address inventory availability, alternative packaging formats, and equivalent electrical performance across qualified manufacturers. All substitute relationships maintain compliance with automotive standards and RoHS3 requirements.

Substiute Parts

BZX84-B15/LF1R

NXP USA Inc.In Stock: 961BZX84-B15/LF1R Datasheet

Current PartRFQ

BZX84-A15,215

Nexperia USA Inc.In Stock: 12842BZX84-A15,215 Datasheet

Parametric EquivalentRFQ

BZX84-B15,215

Nexperia USA Inc.In Stock: 55475BZX84-B15,215 Datasheet

Parametric EquivalentRFQ

BZX84-B15,235

Nexperia USA Inc.In Stock: 10624BZX84-B15,235 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZX84-B15/LF1R is determined by the following critical parameters:

Electrical Parameters (Must Match):

• Voltage - Zener (Nom): 15 V
• Power - Max: 250 mW
• Impedance (Max): 30 Ohms
• Current - Reverse Leakage @ Vr: 50 nA @ 10.5 V
• Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA
• Operating Temperature Range: -65°C to 150°C

Mechanical & Compliance Parameters (Must Match):

• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount
• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant
• MSL: 1 (Unlimited)

Tolerance Variation (Allowed):

• Tolerance: ±1% or ±2% are functionally equivalent for this application

Packaging Format (Allowed Variation):

• Supplier Device Package may vary between SOT-23 (TO-236AB) and TO-236AB formats from different manufacturers

All identified substitute parts maintain identical electrical specifications, automotive qualification, and compliance certifications while sourced from Nexperia USA Inc.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (BZX84-A15,215, BZX84-B15,215, and BZX84-B15,235) are direct functional equivalents to the BZX84-B15/LF1R. Selection criteria are based on the following factors:

Tolerance Specification:

• BZX84-A15,215 offers ±1% tolerance, providing tighter voltage regulation compared to the ±2% tolerance of the main part and other substitutes. This part is suitable for applications requiring enhanced voltage accuracy.
• BZX84-B15,215 and BZX84-B15,235 maintain ±2% tolerance, matching the original specification.

Compliance & Qualification: All substitute parts carry identical automotive-grade classification and AEC-Q101 qualification, confirming suitability for automotive applications. All parts are ROHS3 compliant with MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints.

Inventory Availability:

• BZX84-B15,215 (Nexperia) offers the highest inventory level at 55,403 units, providing optimal supply chain continuity.
• BZX84-A15,215 (Nexperia) provides 12,759 units with enhanced tolerance specification.
• BZX84-B15,235 (Nexperia) provides 10,516 units as an alternative source.

Packaging & Mounting: All substitute parts utilize identical TO-236-3 / SOT-23-3 surface mount packages, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q1: Can BZX84-A15,215 replace BZX84-B15/LF1R in all applications?

A: Yes. BZX84-A15,215 is a direct functional equivalent with identical electrical performance across all critical parameters. The ±1% tolerance of BZX84-A15,215 is tighter than the ±2% specification of BZX84-B15/LF1R, making it suitable for all applications requiring the original part. No circuit modifications are required.

Q2: What is the difference between BZX84-B15,215 and BZX84-B15,235?

A: Both parts are electrically and mechanically identical, maintaining ±2% tolerance and all other specifications. The difference is in the packaging format designation and inventory source. Both are sourced from Nexperia USA Inc. and are interchangeable at the circuit level.

Q3: Are all substitute parts automotive-qualified?

A: Yes. All substitute parts carry AEC-Q101 automotive qualification and Automotive grade classification, identical to the original BZX84-B15/LF1R. All parts are suitable for automotive applications without additional qualification requirements.

Q4: Do the substitute parts require different PCB footprints?

A: No. All substitute parts use the TO-236-3 / SOT-23-3 surface mount package, which is mechanically and electrically identical. Direct PCB footprint compatibility is maintained without layout modifications.

Q5: What is the significance of the tolerance difference between ±1% and ±2%?

A: Tolerance defines the allowable deviation of the Zener voltage from the nominal 15 V specification. BZX84-A15,215 with ±1% tolerance ensures the Zener voltage remains between 14.85 V and 15.15 V. BZX84-B15/LF1R, BZX84-B15,215, and BZX84-B15,235 with ±2% tolerance allow deviation between 14.70 V and 15.30 V. Both tolerances are functionally equivalent for standard voltage regulation applications.

Q6: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts carry ROHS3 Compliant status with MSL rating of 1 (Unlimited), matching the environmental and moisture sensitivity specifications of the original part.

Q7: Which substitute part should be selected for maximum inventory availability?

A: BZX84-B15,215 (Nexperia) provides the highest inventory level at 55,403 units while maintaining identical electrical specifications and ±2% tolerance matching the original part.