SMBJ48D-M3/H Equivalent and Substitute Parts\n\n## Part Overview\n\nThe SMBJ48D-M3/H is a transient voltage suppressor (TVS) diode from Vishay General Semiconductor's TransZorb® series, designed for surface mount applications in the DO-214AA (SMB) package. This unidirectional Zener diode provides overvoltage protection with a 48V reverse standoff voltage and 76.3V clamping voltage at peak pulse current. The device is active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).\n\nSubstitute parts are necessary when the primary device requires extended lead times, when procurement from alternative manufacturers reduces supply chain risk, or when packaging format changes in production require compatible alternatives that maintain electrical and mechanical performance specifications.\n\n## Key Parameters\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c/th\u003e\n\u003cth\u003eValue\u003c/th\u003e\n\u003cth\u003eUnit\u003c/th\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c/td\u003e\n\u003ctd\u003eSMBJ48D-M3/H\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c/td\u003e\n\u003ctd\u003eVishay General Semiconductor - Diodes Division\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCategory\u003c/td\u003e\n\u003ctd\u003eTransient Voltage Suppressors (TVS)\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackaging\u003c/td\u003e\n\u003ctd\u003eTape \u0026 Reel (TR)\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage / Case\u003c/td\u003e\n\u003ctd\u003eDO-214AA, SMB\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c/td\u003e\n\u003ctd\u003eZener\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnidirectional Channels\u003c/td\u003e\n\u003ctd\u003e1\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage - Reverse Standoff (Typ)\u003c/td\u003e\n\u003ctd\u003e48\u003c/td\u003e\n\u003ctd\u003eV\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage - Breakdown (Min)\u003c/td\u003e\n\u003ctd\u003e54.1\u003c/td\u003e\n\u003ctd\u003eV\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage - Clamping (Max) @ Ipp\u003c/td\u003e\n\u003ctd\u003e76.3\u003c/td\u003e\n\u003ctd\u003eV\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent - Peak Pulse (10/1000µs)\u003c/td\u003e\n\u003ctd\u003e7.9\u003c/td\u003e\n\u003ctd\u003eA\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower - Peak Pulse\u003c/td\u003e\n\u003ctd\u003e600\u003c/td\u003e\n\u003ctd\u003eW\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature Range\u003c/td\u003e\n\u003ctd\u003e−55 to +150\u003c/td\u003e\n\u003ctd\u003e°C (TJ)\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c/td\u003e\n\u003ctd\u003eSurface Mount\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoHS Status\u003c/td\u003e\n\u003ctd\u003eROHS3 Compliant\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMSL Rating\u003c/td\u003e\n\u003ctd\u003e1 (Unlimited)\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/table\u003e\n\n## Substitute Part Grouping Explanation\n\nSubstitution of SMBJ48D-M3/H is determined by the following electrical and mechanical parameters that must be maintained:\n\nElectrical Compatibility Requirements:\n- Voltage - Reverse Standoff: 48V (identical)\n- Voltage - Breakdown (Min): Range 53.3–54.1V (acceptable variance within transient suppression design tolerances)\n- Voltage - Clamping (Max) @ Ipp: 76.3–77.4V (acceptable variance within clamping characteristic tolerance)\n- Current - Peak Pulse (10/1000µs): 7.7–8.1A (acceptable variance within surge capacity tolerance)\n- Power - Peak Pulse: 600W (identical)\n- Unidirectional Channels: 1 (identical)\n- Type: Zener (identical)\n\nMechanical Compatibility Requirements:\n- Package / Case: DO-214AA, SMB (identical land pattern and mounting footprint)\n- Mounting Type: Surface Mount (identical)\n- Operating Temperature: −55 to +150°C (identical minimum requirements)\n\nCompliance and Environmental Requirements:\n- RoHS Status: ROHS3 Compliant (required)\n- MSL Rating: 1 (Unlimited) (required)\n- Product Status: Active (required)\n\nThe substitute parts listed below—SMBJ48A-E3/52, SMBJ48A, SMBJ48A-13-F, and SMBJ48A-TR—all maintain these electrical and mechanical parameters and are therefore direct functional substitutes.\n\n## Parameter Comparison\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c/th\u003e\n\u003cth\u003eSMBJ48D-M3/H (Main)\u003c/th\u003e\n\u003cth\u003eSMBJ48A-E3/52\u003c/th\u003e\n\u003cth\u003eSMBJ48A (Meritek)\u003c/th\u003e\n\u003cth\u003eSMBJ48A-13-F\u003c/th\u003e\n\u003cth\u003eSMBJ48A-TR\u003c/th\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c/td\u003e\n\u003ctd\u003eVishay\u003c/td\u003e\n\u003ctd\u003eVishay\u003c/td\u003e\n\u003ctd\u003eMeritek\u003c/td\u003e\n\u003ctd\u003eDiodes Inc.\u003c/td\u003e\n\u003ctd\u003eSTMicroelectronics\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackaging\u003c/td\u003e\n\u003ctd\u003eTape \u0026 Reel (TR)\u003c/td\u003e\n\u003ctd\u003eCut Tape \u0026 Digi-Reel®\u003c/td\u003e\n\u003ctd\u003e—\u003c/td\u003e\n\u003ctd\u003eTape \u0026 Reel (TR)\u003c/td\u003e\n\u003ctd\u003eCut Tape \u0026 Digi-Reel®\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage - Reverse Standoff (Typ)\u003c/td\u003e\n\u003ctd\u003e48V\u003c/td\u003e\n\u003ctd\u003e48V\u003c/td\u003e\n\u003ctd\u003e48V\u003c/td\u003e\n\u003ctd\u003e48V\u003c/td\u003e\n\u003ctd\u003e48V\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage - Breakdown (Min)\u003c/td\u003e\n\u003ctd\u003e54.1V\u003c/td\u003e\n\u003ctd\u003e53.3V\u003c/td\u003e\n\u003ctd\u003e53.3V\u003c/td\u003e\n\u003ctd\u003e53.3V\u003c/td\u003e\n\u003ctd\u003e53.3V\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage - Clamping (Max) @ Ipp\u003c/td\u003e\n\u003ctd\u003e76.3V\u003c/td\u003e\n\u003ctd\u003e77.4V\u003c/td\u003e\n\u003ctd\u003e77.4V\u003c/td\u003e\n\u003ctd\u003e77.4V\u003c/td\u003e\n\u003ctd\u003e77.4V\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent - Peak Pulse (10/1000µs)\u003c/td\u003e\n\u003ctd\u003e7.9A\u003c/td\u003e\n\u003ctd\u003e7.8A\u003c/td\u003e\n\u003ctd\u003e7.75A\u003c/td\u003e\n\u003ctd\u003e7.7A\u003c/td\u003e\n\u003ctd\u003e8.1A\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower - Peak Pulse\u003c/td\u003e\n\u003ctd\u003e600W\u003c/td\u003e\n\u003ctd\u003e600W\u003c/td\u003e\n\u003ctd\u003e600W\u003c/td\u003e\n\u003ctd\u003e600W\u003c/td\u003e\n\u003ctd\u003e600W\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage / Case\u003c/td\u003e\n\u003ctd\u003eDO-214AA, SMB\u003c/td\u003e\n\u003ctd\u003eDO-214AA, SMB\u003c/td\u003e\n\u003ctd\u003eDO-214AA (SMB)\u003c/td\u003e\n\u003ctd\u003eDO-214AA, SMB\u003c/td\u003e\n\u003ctd\u003eDO-214AA, SMB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c/td\u003e\n\u003ctd\u003e−55 to +150°C\u003c/td\u003e\n\u003ctd\u003e−55 to +150°C\u003c/td\u003e\n\u003ctd\u003e−55 to +150°C\u003c/td\u003e\n\u003ctd\u003e−55 to +150°C\u003c/td\u003e\n\u003ctd\u003e−55 to +150°C\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoHS Status\u003c/td\u003e\n\u003ctd\u003eROHS3 Compliant\u003c/td\u003e\n\u003ctd\u003eROHS3 Compliant\u003c/td\u003e\n\u003ctd\u003eROHS3 Compliant\u003c/td\u003e\n\u003ctd\u003eROHS3 Compliant\u003c/td\u003e\n\u003ctd\u003eROHS3 Compliant\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMSL Rating\u003c/td\u003e\n\u003ctd\u003e1 (Unlimited)\u003c/td\u003e\n\u003ctd\u003e1 (Unlimited)\u003c/td\u003e\n\u003ctd\u003e1 (Unlimited)\u003c/td\u003e\n\u003ctd\u003e1 (Unlimited)\u003c/td\u003e\n\u003ctd\u003e1 (Unlimited)\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Status\u003c/td\u003e\n\u003ctd\u003eActive\u003c/td\u003e\n\u003ctd\u003eActive\u003c/td\u003e\n\u003ctd\u003eActive\u003c/td\u003e\n\u003ctd\u003eActive\u003c/td\u003e\n\u003ctd\u003eActive\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInventory (Pcs)\u003c/td\u003e\n\u003ctd\u003e1135\u003c/td\u003e\n\u003ctd\u003e20100\u003c/td\u003e\n\u003ctd\u003e77400\u003c/td\u003e\n\u003ctd\u003e6400\u003c/td\u003e\n\u003ctd\u003e1756\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/table\u003e\n\n## Engineering Selection Recommendations\n\nAll listed substitute parts—SMBJ48A-E3/52, SMBJ48A (Meritek), SMBJ48A-13-F, and SMBJ48A-TR—meet the electrical, mechanical, and compliance requirements for direct substitution with SMBJ48D-M3/H.\n\nSelection Basis:\n\nSMBJ48A-E3/52 (Vishay): Maintains same manufacturer as primary device. ROHS3 Compliant, MSL 1, Active status. Packaging in Cut Tape \u0026 Digi-Reel® format requires compatible handling equipment if production normally uses Tape \u0026 Reel equipment.\n\nSMBJ48A (Meritek): Highest inventory availability (77,400 Pcs) reduces lead time risk. ROHS3 Compliant, MSL 1, Active status. Packaging format unspecified in product data.\n\nSMBJ48A-13-F (Diodes Incorporated): Available in Tape \u0026 Reel format, matching primary device packaging. ROHS3 Compliant, MSL 1, Active status. Peak pulse current specified at 7.7A, lowest within acceptable substitution range.\n\nSMBJ48A-TR (STMicroelectronics): Peak pulse current at 8.1A, highest among substitutes, provides margin in surge capacity. ROHS3 Compliant, MSL 1, Active status. Packaging in Cut Tape \u0026 Digi-Reel® format.\n\nSelection among these alternatives depends on procurement strategy, packaging compatibility with existing production lines, and supply chain risk management objectives.\n\n## Frequently Asked Questions (FAQ)\n\nQ: Can SMBJ48A-E3/52 replace SMBJ48D-M3/H in existing board designs?\n\nA: Yes. Both devices share identical DO-214AA (SMB) package footprints, 48V reverse standoff voltage, 600W peak pulse power, and operating temperature range. Electrical parameters fall within acceptable variance for TVS diode design: clamping voltage 77.4V versus 76.3V, and peak pulse current 7.8A versus 7.9A.\n\nQ: What is the difference between Tape \u0026 Reel and Cut Tape \u0026 Digi-Reel® packaging?\n\nA: Tape \u0026 Reel (TR) packaging provides continuous reel format suitable for high-volume automated pick-and-place assembly. Cut Tape \u0026 Digi-Reel® packaging offers tape segments and alternate reel format. Both formats contain identical components; packaging selection depends on production equipment compatibility and volume requirements.\n\nQ: Why do clamping voltage values differ between SMBJ48D-M3/H and substitute parts?\n\nA: TVS diode clamping characteristics vary within manufacturing tolerances. SMBJ48D-M3/H specifies 76.3V maximum clamping at peak pulse current, while SMBJ48A variants specify 77.4V. Both values fall within normal transient voltage suppression performance envelope and do not affect circuit protection function.\n\nQ: Are all substitute parts ROHS3 compliant?\n\nA: Yes. All listed substitutes—SMBJ48A-E3/52, SMBJ48A, SMBJ48A-13-F, and SMBJ48A-TR—carry ROHS3 Compliant certification and MSL 1 (Unlimited) moisture sensitivity rating, matching the primary device specifications.\n\nQ: Which substitute provides the best surge capacity margin?\n\nA: SMBJ48A-TR from STMicroelectronics offers peak pulse current specification of 8.1A, providing 0.2A margin above the primary device 7.9A specification, within the 600W peak pulse power limitation common to all devices.\n\nQ: Can these substitutes be used interchangeably in the same bill of materials (BOM)?\n\nA: Substitution suitability depends on production workflow. If Tape \u0026 Reel format is production standard, SMBJ48A-13-F maintains compatibility. For flexible sourcing, all four alternatives meet electrical and mechanical requirements; however, packaging format changes may require production equipment verification.","file_path":"/tmp/SMBJ48D-M3H_Equivalent_Substitute_Parts.md"}","type":"input_json_delta"},"index":1,"type":"content_block_delta"}

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