V12P45HM3_A/I Equivalent & Substitute Parts

Part Overview

The V12P45HM3_A/I is an automotive-grade Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 45 V DC reverse voltage with a 12 A average rectified current rating and is housed in a TO-277A (SMPC) package. The device is qualified to AEC-Q101 automotive standards and maintains an active product status. Substitute parts are identified to address inventory availability, supply chain continuity, and manufacturing flexibility while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io)	12	A
Voltage - Forward (Vf) (Max) @ If	580 mV @ 12 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	1	mA @ 45 V
Technology	Schottky	—
Package / Case	TO-277, 3-PowerDFN	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-40 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
Series	eSMP®, TMBS®	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the V12P45HM3_A/I is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part V12P45HM3_A/H maintains identical specifications in the following key areas:

Voltage rating (45 V DC reverse), current capacity (12 A average rectified), forward voltage drop (580 mV @ 12 A), switching speed (fast recovery ≤ 500ns), reverse leakage current (1 mA @ 45 V), package type (TO-277A SMPC), mounting method (surface mount), temperature range (-40°C to 150°C junction), technology (Schottky), automotive grade classification, and AEC-Q101 qualification. Both parts share the same base product number (V12P45) and belong to the eSMP® and TMBS® series. Compliance with ROHS3 and REACH requirements is maintained across both variants. The substitution is based on parametric equivalence with no functional or performance differentiation.

Parameter Comparison

Parameter	V12P45HM3_A/I	V12P45HM3_A/H	Match
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	✓
Current - Average Rectified (Io)	12 A	12 A	✓
Voltage - Forward (Vf) (Max) @ If	580 mV @ 12 A	580 mV @ 12 A	✓
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	✓
Current - Reverse Leakage @ Vr	1 mA @ 45 V	1 mA @ 45 V	✓
Technology	Schottky	Schottky	✓
Package / Case	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	✓
Supplier Device Package	TO-277A (SMPC)	TO-277A (SMPC)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Operating Temperature - Junction	-40°C to 150°C	-40°C to 150°C	✓
Grade	Automotive	Automotive	✓
Qualification	AEC-Q101	AEC-Q101	✓
Series	eSMP®, TMBS®	eSMP®, TMBS®	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
REACH Status	REACH Unaffected	REACH Unaffected	✓
Product Status	Active	Active	✓

Engineering Selection Recommendations

Both the V12P45HM3_A/I and V12P45HM3_A/H are active, production-qualified components suitable for direct substitution in automotive applications. Selection between these parts should be based on inventory availability and supply chain requirements rather than technical performance differentiation. The V12P45HM3_A/H currently maintains higher inventory levels (6905 pcs) compared to the V12P45HM3_A/I (645 pcs), making it the preferred choice for high-volume procurement and extended lead-time mitigation. Both parts satisfy AEC-Q101 automotive qualification requirements and maintain full ROHS3 and REACH compliance. PCB layout, thermal management, and circuit design considerations remain identical between the two variants due to matching electrical characteristics and identical TO-277A package specifications.

Frequently Asked Questions (FAQ)

Q: Can V12P45HM3_A/H be used as a direct replacement for V12P45HM3_A/I in existing designs?

A: Yes. Both parts are parametrically equivalent across all electrical and mechanical specifications. No circuit redesign, PCB layout modification, or thermal analysis revision is required for substitution.

Q: Are there differences in package dimensions or pin configuration between these parts?

A: No. Both parts use the TO-277A (SMPC) package with identical 3-PowerDFN case specifications. Pin-to-pin compatibility is guaranteed.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the V12P45HM3_A/I and V12P45HM3_A/H carry AEC-Q101 automotive qualification and automotive-grade classification.

Q: What is the difference between the part number suffixes _A/I and _A/H?

A: The suffix variation indicates different manufacturing batches or tape reel configurations within the same parametric family. No functional or electrical differences exist between these designations.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts maintain identical ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification.

Q: Can these parts be used interchangeably in high-temperature automotive applications?

A: Yes. Both parts operate across the identical junction temperature range of -40°C to 150°C and are suitable for automotive thermal environments.

Q: Is there a preferred part number for new designs?

A: From a technical standpoint, both parts are equivalent. Selection should be based on current inventory availability and supplier lead times. The V12P45HM3_A/H currently has higher stock levels.

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