BAR28 Equivalent & Substitute Parts

Part Overview

The BAR28 is a Schottky diode manufactured by STMicroelectronics, rated for 70 V DC reverse voltage with 15 mA average rectified current in a DO-35 through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The BAR28 operates across a junction temperature range of -65°C to 200°C and is ROHS3 compliant.

Substiute Parts

BAR28

STMicroelectronicsIn Stock: 1161BAR28 Datasheet

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1N5711

Microchip TechnologyIn Stock: 472811N5711 Datasheet

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1N5711-1

Microchip TechnologyIn Stock: 21111N5711-1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BAR28 are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 70 V
• Voltage - Forward (Vf) (Max) @ If: Must equal 1 V @ 15 mA
• Current - Reverse Leakage @ Vr: Must equal 200 nA @ 50 V
• Capacitance @ Vr, F: Must equal 2 pF @ 0 V, 1 MHz
• Technology: Must be Schottky diode type
• Speed Classification: Small Signal ≤ 200 mA (Io), Any Speed

Mechanical Compatibility Criteria:

• Package / Case: Must be DO-204AH, DO-35, or Axial equivalent
• Mounting Type: Must be Through Hole

The substitute parts 1N5711 and 1N5711-1 meet all electrical parameters and mechanical requirements. Both are manufactured by Microchip Technology and are available in active product status with higher average rectified current ratings (33 mA), providing enhanced current capacity while maintaining full backward compatibility with the BAR28 electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 1N5711 or 1N5711-1

Both 1N5711 and 1N5711-1 are direct electrical and mechanical substitutes for the BAR28. These parts are manufactured by Microchip Technology and maintain active product status, ensuring long-term availability and supply chain continuity.

Electrical Equivalence: The 1N5711 and 1N5711-1 satisfy all critical electrical parameters of the BAR28, including reverse voltage rating, forward voltage drop, reverse leakage current, and junction capacitance. The higher average rectified current rating (33 mA versus 15 mA) provides additional design margin without introducing incompatibility.

Compliance Considerations: The BAR28 is ROHS3 compliant, while the 1N5711 and 1N5711-1 are RoHS non-compliant. Applications requiring RoHS compliance must account for this difference. Both substitute parts are REACH unaffected and carry EAR99 export classification, matching the BAR28 regulatory profile.

Temperature Range: The BAR28 operates to 200°C junction temperature, while substitute parts operate to 150°C. Applications requiring operation above 150°C junction temperature cannot use these substitutes.

Availability: The 1N5711 is available in high volume (47,190 pieces in stock), while 1N5711-1 is available in lower volume (2,050 pieces in stock). The 1N5711 is recommended for applications requiring immediate or high-volume procurement.

Frequently Asked Questions (FAQ)

Q: Can the 1N5711 directly replace the BAR28 in existing designs?

A: Yes. The 1N5711 meets all electrical specifications of the BAR28, including reverse voltage (70 V), forward voltage drop (1 V @ 15 mA), reverse leakage current (200 nA @ 50 V), and junction capacitance (2 pF @ 0 V, 1 MHz). Both components use identical DO-35 through-hole packaging and axial lead configuration.

Q: What is the difference between 1N5711 and 1N5711-1?

A: Both parts are electrically identical Schottky diodes with 70 V reverse voltage rating and identical electrical characteristics. The primary difference is inventory availability and base product number designation. 1N5711-1 references 1N5711 as its base product number.

Q: Why does the 1N5711 have a higher current rating (33 mA) than the BAR28 (15 mA)?

A: The 1N5711 is a higher-capacity variant of the same Schottky diode technology. The increased current rating provides additional design margin and thermal headroom. This does not affect compatibility; circuits designed for 15 mA operation function identically with the 33 mA rated part.

Q: Are there temperature range limitations when substituting the 1N5711 for the BAR28?

A: Yes. The BAR28 operates to 200°C junction temperature, while the 1N5711 operates to 150°C. Applications requiring sustained operation above 150°C junction temperature cannot use the 1N5711 as a substitute.

Q: What is the impact of RoHS compliance differences?

A: The BAR28 is ROHS3 compliant, while the 1N5711 and 1N5711-1 are RoHS non-compliant. Applications subject to RoHS regulations must account for this difference. Both substitute parts are REACH unaffected.

Q: Can these diodes be used interchangeably in PCB designs?

A: Yes. All three parts use DO-35 through-hole packaging with identical axial lead configuration and spacing. No PCB layout modifications are required for substitution.

Q: What is the reverse leakage current specification?

A: All three parts specify 200 nanoamperes (nA) reverse leakage current at 50 V reverse bias, indicating identical leakage characteristics across the BAR28 and substitute parts.