B4S-HF Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The B4S-HF is a single-phase bridge rectifier manufactured by Comchip Technology, designed for 400 V peak reverse voltage applications with 800 mA average rectified current capacity. This component is classified as Active in product status and is suitable for surface mount applications in standard rectification circuits.

Substitute parts become necessary when the primary part number reaches end-of-life status, inventory constraints occur, or when alternative packaging formats better suit manufacturing requirements while maintaining identical electrical performance.

Substiute Parts

B4S-HF

Comchip TechnologyIn Stock: 837B4S-HF Datasheet

Current PartRFQ

B4S-G

Comchip TechnologyIn Stock: 3911B4S-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the B4S-HF is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage - Peak Reverse (Max): 400 V
• Current - Average Rectified (Io): 800 mA
• Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 800 mA
• Current - Reverse Leakage @ Vr: 5 µA @ 400 V
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Diode Type: Single Phase
• Technology: Standard
• Mounting Type: Surface Mount
• Package / Case: TO-269AA, 4-BESOP

The B4S-G qualifies as a parametric equivalent substitute, sharing identical electrical specifications and mechanical compatibility. Differences in product status and packaging format do not affect functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The B4S-HF is the preferred selection for new designs due to its Active product status, ensuring long-term availability and manufacturing support. The B4S-G remains functionally equivalent across all electrical and mechanical parameters and is suitable for legacy system maintenance or applications where existing inventory is available.

Both parts maintain identical RoHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial applications. The choice between Tape & Reel and Cut Tape packaging formats depends on production volume and assembly line configuration requirements.

Frequently Asked Questions (FAQ)

Q: Can B4S-G replace B4S-HF in existing designs?

A: Yes. The B4S-G is a parametric equivalent with identical electrical specifications (400 V peak reverse voltage, 800 mA average rectified current, 1.1 V forward voltage, 5 µA reverse leakage) and mechanical compatibility (TO-269AA, 4-BESOP package, surface mount). The only differences are product status and packaging format.

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

A: Tape & Reel (TR) packaging is supplied on continuous carrier tape suitable for automated pick-and-place assembly equipment. Cut Tape (CT) & Digi-Reel® packaging provides the same components in smaller quantities on cut tape segments. Both formats contain identical components with no electrical or mechanical differences.

Q: Are there compliance differences between B4S-HF and B4S-G?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity levels (MSL 1 - Unlimited). Regulatory and environmental compliance is equivalent.

Q: Why is B4S-G marked as Obsolete?

A: Product status reflects manufacturing lifecycle stage. Obsolete status indicates the part is no longer in active production. B4S-HF, with Active status, is recommended for new designs to ensure continued availability.

Q: Can these parts be used interchangeably in circuit design?

A: Yes. Identical electrical parameters (voltage, current, temperature range, forward voltage, reverse leakage) and mechanical specifications (package type, mounting method) ensure direct functional interchangeability in all circuit applications designed for the B4S-HF.