1N4946GP-TP Equivalent & Substitute Parts

Part Overview

The 1N4946GP-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 600 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole axial package. This device is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Equivalent and substitute parts are necessary for applications requiring continued supply, design flexibility, or performance optimization while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 1	V @ A
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	5 @ 600	µA @ V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 1N4946GP-TP is determined by strict equivalence in the following electrical parameters:

Voltage Rating: 600 V DC reverse voltage (Vr)
Current Rating: 1 A average rectified current (Io)
Package Type: DO-41 through-hole axial configuration
Speed Classification: Fast Recovery (≤500 ns, >200 mA)
Reverse Leakage: 5 µA @ 600 V
Compliance: ROHS3 Compliant, REACH Unaffected

Substitute parts are classified into two categories:

Parametric Equivalents — Parts with identical or superior electrical specifications and active product status:

1N4937GP-TP (Micro Commercial Co)
FR105GP-TP (Micro Commercial Co)
SF18G-TP (Micro Commercial Co)
FR105G (Taiwan Semiconductor Corporation)
FR105G A0G (Taiwan Semiconductor Corporation)
FR105G R1G (Taiwan Semiconductor Corporation)

Similar Parts — Parts meeting core voltage and current requirements with minor parameter variations or different product status:

1N4937RLG (onsemi)
BA158-E3/53 (Vishay General Semiconductor - Diodes Division)
BA158-E3/54 (Vishay General Semiconductor - Diodes Division)
MUR260RLG (onsemi)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V @ A]	trr [ns]	Ir @ Vr [µA @ V]	Package	Product Status	Inventory [Pcs]
1N4946GP-TP	Micro Commercial Co	600	1	1.3 @ 1	250	5 @ 600	DO-41	Not For New Designs	660
1N4937GP-TP	Micro Commercial Co	600	1	1.2 @ 1	200	5 @ 600	DO-41	Active	890
FR105GP-TP	Micro Commercial Co	600	1	1.3 @ 1	250	5 @ 600	DO-41	Active	1098
SF18G-TP	Micro Commercial Co	600	1	1.3 @ 1	35	5 @ 600	DO-41	Active	862
FR105G	Taiwan Semiconductor Corporation	600	1	1.3 @ 1	250	5 @ 600	DO-41	Active	10952
FR105G A0G	Taiwan Semiconductor Corporation	600	1	1.3 @ 1	250	5 @ 600	DO-41	Active	5309
FR105G R1G	Taiwan Semiconductor Corporation	600	1	1.3 @ 1	250	5 @ 600	DO-41	Active	706
1N4937RLG	onsemi	600	1	1.2 @ 1	300	5 @ 600	Axial	Not For New Designs	4300
BA158-E3/53	Vishay General Semiconductor - Diodes Division	600	1	1.3 @ 1	250	5 @ 600	DO-41	Active	623
BA158-E3/54	Vishay General Semiconductor - Diodes Division	600	1	1.3 @ 1	250	5 @ 600	DO-41	Active	25653
MUR260RLG	onsemi	600	2	1.35 @ 2	75	5 @ 600	Axial	Active	80300

Engineering Selection Recommendations

Primary Substitutes (Parametric Equivalents with Active Status):

1N4937GP-TP — Recommended for direct replacement. Manufactured by Micro Commercial Co with identical voltage and current ratings. Product status is Active. Forward voltage is 1.2 V (lower than 1N4946GP-TP at 1.3 V), and reverse recovery time is 200 ns (faster than 250 ns). ROHS3 Compliant. Inventory: 890 pcs.
FR105GP-TP — Recommended for direct replacement. Manufactured by Micro Commercial Co. Electrical specifications are identical to 1N4946GP-TP. Product status is Active. ROHS3 Compliant. Inventory: 1098 pcs.
SF18G-TP — Suitable for applications requiring faster switching performance. Manufactured by Micro Commercial Co. Reverse recovery time is 35 ns (significantly faster than 250 ns). All other electrical parameters match. Product status is Active. ROHS3 Compliant. Inventory: 862 pcs.
FR105G / FR105G A0G / FR105G R1G — Recommended for direct replacement. Manufactured by Taiwan Semiconductor Corporation. Electrical specifications are identical to 1N4946GP-TP. Product status is Active. ROHS3 Compliant. Available inventory: 10952 pcs (FR105G), 5309 pcs (FR105G A0G), 706 pcs (FR105G R1G).

Secondary Substitutes (Similar Parts with Acceptable Variations):

BA158-E3/54 — Manufactured by Vishay General Semiconductor - Diodes Division. Meets all core electrical requirements (600 V, 1 A, DO-41 package). Product status is Active. ROHS3 Compliant. Highest inventory availability: 25653 pcs. Operating temperature range: -65°C to 125°C (narrower than 1N4946GP-TP).
BA158-E3/53 — Manufactured by Vishay General Semiconductor - Diodes Division. Meets all core electrical requirements. Product status is Active. ROHS3 Compliant. Operating temperature range: -65°C to 175°C (wider than 1N4946GP-TP). Inventory: 623 pcs.
1N4937RLG — Manufactured by onsemi. Meets voltage and current requirements. Product status is Not For New Designs. Reverse recovery time is 300 ns (slower than 250 ns). Inventory: 4300 pcs.

Not Recommended for Direct Substitution:

MUR260RLG — Current rating is 2 A (exceeds 1N4946GP-TP requirement of 1 A). While electrically compatible at lower current levels, this part is oversized for the application and should only be used if higher current capacity is required.

Frequently Asked Questions (FAQ)

Q1: Can I use 1N4937GP-TP as a direct replacement for 1N4946GP-TP?

A: Yes. Both parts are manufactured by Micro Commercial Co and share identical voltage (600 V) and current (1 A) ratings in DO-41 packages. The 1N4937GP-TP has lower forward voltage (1.2 V vs. 1.3 V) and faster reverse recovery time (200 ns vs. 250 ns), making it a superior substitute. Product status is Active.

Q2: What is the difference between FR105GP-TP and FR105G?

A: Both parts have identical electrical specifications and are manufactured by different suppliers (FR105GP-TP by Micro Commercial Co, FR105G by Taiwan Semiconductor Corporation). FR105G has higher inventory availability (10952 pcs vs. 1098 pcs). Both are Active products and ROHS3 Compliant.

Q3: Why is SF18G-TP listed as a substitute if its reverse recovery time is much faster (35 ns vs. 250 ns)?

A: SF18G-TP meets all core electrical requirements (600 V, 1 A, DO-41 package, 5 µA leakage). The faster reverse recovery time (35 ns) is a performance enhancement, not a limitation. It is suitable for applications where faster switching is beneficial or neutral. Product status is Active.

Q4: Can I use BA158-E3/54 instead of 1N4946GP-TP?

A: Yes, with one consideration. BA158-E3/54 meets all electrical requirements (600 V, 1 A, DO-41 package). However, its operating temperature range is -65°C to 125°C, which is narrower than 1N4946GP-TP (-55°C to 150°C). Verify that your application does not exceed 125°C junction temperature. Product status is Active with highest inventory (25653 pcs).

Q5: Is MUR260RLG a suitable substitute?

A: MUR260RLG is not a direct substitute. While it shares the 600 V voltage rating and DO-41 package, its current rating is 2 A (double the 1N4946GP-TP). Use MUR260RLG only if your application requires higher current capacity. It is an oversized part for 1 A applications.

Q6: What does "Not For New Designs" mean for 1N4946GP-TP?

A: This designation indicates the manufacturer has discontinued active development and recommends using newer alternatives for new circuit designs. Existing inventory may still be available, but long-term supply is not guaranteed. Substitutes with "Active" product status are recommended for new designs.

Q7: Are all substitute parts ROHS3 Compliant?

A: Yes. All listed substitute parts are ROHS3 Compliant and REACH Unaffected, matching the compliance status of 1N4946GP-TP.

Q8: Can I use parts with different reverse recovery times interchangeably?

A: Reverse recovery time affects switching speed and electromagnetic interference characteristics. Parts with faster recovery times (lower trr values) are generally suitable replacements for slower parts in the same voltage and current class. Parts with slower recovery times may introduce additional switching losses. Verify application requirements before substitution.

Q9: What is the significance of packaging variants (Tape & Reel vs. Cut Tape)?

A: Tape & Reel (TR) packaging is used for automated assembly lines, while Cut Tape (CT) is used for manual or semi-automated assembly. Both contain identical components. Select based on your assembly process requirements, not electrical performance.

Q10: Which substitute offers the best inventory availability?

A: BA158-E3/54 (Vishay) offers the highest inventory with 25653 pcs in stock. FR105G (Taiwan Semiconductor Corporation) offers 10952 pcs. Both are Active products suitable for immediate procurement.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message