Equivalent & Substitute Parts for TT8M-T Bridge Rectifier

Part Overview

The TT8M-T is a medium/high power bridge rectifier manufactured by Diodes Incorporated, designed for single-phase rectification applications at 1 kV peak reverse voltage with 8 A average rectified current. This component is classified as obsolete, which necessitates identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Bridge rectifiers in this category serve as fundamental power conversion components in AC-to-DC conversion circuits, power supplies, and industrial rectification systems. The obsolete status of the TT8M-T requires substitution with functionally equivalent active parts to ensure design continuity and supply chain reliability.

Substiute Parts

TT8M-T

Diodes IncorporatedIn Stock: 1004TT8M-T Datasheet

Current PartRFQ

HBS810-13

Diodes IncorporatedIn Stock: 4810HBS810-13 Datasheet

Parametric EquivalentRFQ

TT8M

Diodes IncorporatedIn Stock: 101015TT8M Datasheet

Parametric EquivalentRFQ

TT8M_HF

Diodes IncorporatedIn Stock: 1105TT8M_HF Datasheet

Parametric EquivalentRFQ

HBS810

SMC Diode SolutionsIn Stock: 4254HBS810 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TT8M-T is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Voltage - Peak Reverse (Max): 1 kV
• Current - Average Rectified (Io): 8 A
• Current - Reverse Leakage @ Vr: 5 µA @ 1000 V
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Diode Type: Single Phase
• Technology: Standard

Mechanical Parameters (Must Match):

• Mounting Type: Surface Mount
• Package / Case: 4-SMD, Gull Wing

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain these critical parameters. Variations in forward voltage specification (Vf @ If) and supplier device package designation do not preclude substitution when all other parameters remain equivalent. Product status transition from obsolete to active represents the primary substitution driver.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Diodes Incorporated):

The TT8M and TT8M_HF parts are direct substitutes manufactured by Diodes Incorporated, the original manufacturer of the TT8M-T. Both parts maintain identical electrical specifications and are classified as active products. The TT8M offers the highest inventory availability at 100,965 pieces, providing supply chain stability. The TT8M_HF variant is also available with 1,077 pieces in stock. Both parts carry ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the obsolete TT8M-T.

Secondary Substitutes (Diodes Incorporated HBS Package):

The HBS810-13 is a parametrically equivalent bridge rectifier from Diodes Incorporated with identical electrical performance. This part differs in supplier device package designation (HBS versus TT) and forward voltage specification point (1 V @ 8 A versus 1 V @ 4 A), but maintains all critical electrical and mechanical parameters. The HBS810-13 is available in Tape & Reel packaging with 4,771 pieces in stock and carries ROHS3 compliance and REACH Unaffected status.

Alternative Substitute (SMC Diode Solutions):

The HBS810 from SMC Diode Solutions is electrically and mechanically equivalent to the TT8M-T with 4,148 pieces available in Cut Tape and Digi-Reel packaging. This part carries ROHS3 compliance but is classified as REACH Affected, which may introduce regulatory considerations in certain applications or jurisdictions. The HBS810 maintains identical electrical specifications and 4-SMD Gull Wing package configuration.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating. The HBS810-13, TT8M, and TT8M_HF retain REACH Unaffected status identical to the TT8M-T. The HBS810 carries REACH Affected status, which requires evaluation against specific application regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the TT8M directly replace the TT8M-T in existing designs?

A: Yes. The TT8M is electrically and mechanically equivalent to the TT8M-T. Both parts share identical voltage ratings (1 kV peak reverse), current ratings (8 A average rectified), temperature range (-55°C to 150°C), and package configuration (4-SMD Gull Wing). The TT8M is an active product, whereas the TT8M-T is obsolete.

Q: What is the difference between the TT8M and TT8M_HF?

A: Both parts are electrically equivalent with identical voltage, current, and temperature specifications. The designation difference (_HF suffix) indicates a variant classification by Diodes Incorporated. Both maintain the same 4-SMD Gull Wing package and are suitable for direct substitution of the TT8M-T.

Q: Can I use the HBS810-13 instead of the TT8M-T?

A: Yes. The HBS810-13 maintains all critical electrical parameters: 1 kV peak reverse voltage, 8 A average rectified current, 5 µA reverse leakage at 1000 V, and -55°C to 150°C operating temperature. The primary difference is the supplier device package designation (HBS versus TT), which does not affect electrical compatibility. The HBS810-13 is available in Tape & Reel packaging.

Q: What is the difference between the HBS810-13 and HBS810?

A: Both parts are electrically equivalent with identical voltage, current, and temperature specifications. The HBS810-13 is manufactured by Diodes Incorporated with REACH Unaffected status, while the HBS810 is manufactured by SMC Diode Solutions with REACH Affected status. The HBS810-13 is supplied in Tape & Reel packaging, while the HBS810 is supplied in Cut Tape and Digi-Reel packaging.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts (HBS810-13, TT8M, TT8M_HF, and HBS810) carry ROHS3 compliance certification, matching the regulatory status of the TT8M-T.

Q: Does the forward voltage specification difference affect substitution?

A: No. The TT8M-T specifies 1 V @ 4 A forward voltage, while the HBS810-13 and HBS810 specify 1 V @ 8 A. These specifications represent maximum values at different test current points and do not preclude substitution. All parts maintain the same maximum forward voltage limit of 1 V and are suitable for equivalent circuit operation.

Q: What is the MSL rating for these bridge rectifiers?

A: All parts, including the TT8M-T and all substitutes, carry MSL Level 1 (Unlimited) moisture sensitivity rating. This indicates unlimited shelf life without moisture control requirements during storage and handling.

Q: Which substitute offers the best supply availability?

A: The TT8M offers the highest inventory availability with 100,965 pieces in stock, followed by the HBS810-13 with 4,771 pieces and the HBS810 with 4,148 pieces. The TT8M_HF has 1,077 pieces available.

Q: Can I mix different substitute parts in the same production run?

A: Yes. All substitute parts are electrically and mechanically equivalent and maintain identical package configuration (4-SMD Gull Wing). However, design documentation and bill of materials should specify the selected part number for traceability and future maintenance purposes.

Q: What is the REACH status significance for these parts?

A: The TT8M-T, HBS810-13, and TT8M variants carry REACH Unaffected status, indicating no regulatory restrictions under the REACH regulation. The HBS810 carries REACH Affected status, which may require additional compliance verification depending on application jurisdiction and end-use requirements.