UGF12J C0G Equivalent & Substitute Parts

Part Overview

The UGF12J C0G is a general-purpose rectifier diode rated for 600 V DC reverse voltage and 12 A average rectified current in a through-hole TO-220-2 Full Pack configuration. Manufactured by Taiwan Semiconductor Corporation, this component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Active alternatives with identical or comparable electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	12	A
Voltage - Forward (Vf) (Max) @ If	2 V @ 12 A	V @ A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	20	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Mounting Type	Through Hole	—
Package / Case	TO-220-2 Full Pack	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the UGF12J C0G are classified into two categories based on electrical parameter alignment:

Direct Equivalents maintain identical electrical specifications across all critical parameters: 600 V reverse voltage rating, 12 A average rectified current, 2 V forward voltage drop at 12 A, 20 ns reverse recovery time, and 5 µA reverse leakage current at 600 V. These parts are interchangeable without circuit modification.

Parametric Equivalents share the same voltage and current ratings but may differ in secondary characteristics such as reverse recovery time, forward voltage drop, or reverse leakage current. These parts are suitable for applications where the primary design constraints are voltage and current handling capability.

Similar Parts operate at the same 600 V reverse voltage but with different current ratings (8 A, 15 A, or 20 A). Selection depends on circuit current requirements and thermal management considerations.

The critical parameters determining substitution eligibility are:

Voltage - DC Reverse (Vr) (Max): 600 V (mandatory match)
Mounting Type: Through Hole (mandatory match)
Package / Case: TO-220-2 Full Pack or compatible isolated tab variant (mandatory match)
Current - Average Rectified (Io): 12 A minimum for direct equivalents; higher ratings acceptable for similar parts
Speed Classification: Fast Recovery technology (mandatory match)

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Package	Product Status
UGF12J C0G	Taiwan Semiconductor Corporation	600	12	2 @ 12 A	20	5 @ 600 V	TO-220-2 Full Pack	Discontinued
UGF12J	Taiwan Semiconductor Corporation	600	12	2 @ 12 A	20	5 @ 600 V	TO-220-2 Full Pack	Active
UGF12JH	Taiwan Semiconductor Corporation	600	12	2 @ 12 A	20	5 @ 600 V	TO-220-2 Full Pack	Active
BYC8X-600P,127	WeEn Semiconductors	600	8	1.9 @ 8 A	18	20 @ 600 V	TO-220-2 Full Pack, Isolated Tab	Active
BYC20X-600PQ	WeEn Semiconductors	600	20	2.5 @ 20 A	35	10 @ 600 V	TO-220-2 Full Pack, Isolated Tab	Active
MURF1560G	onsemi	600	15	1.5 @ 15 A	60	10 @ 600 V	TO-220-2 Full Pack	Active
VS-ETL1506FP-M3	Vishay General Semiconductor - Diodes Division	600	15	1.07 @ 15 A	210	15 @ 600 V	TO-220-2 Full Pack	Active

Engineering Selection Recommendations

Direct Replacement (Identical Specifications): UGF12J and UGF12JH are direct equivalents to the discontinued UGF12J C0G. Both parts maintain 600 V reverse voltage, 12 A current rating, and identical electrical characteristics. UGF12J is available in active status with 1146 pieces in stock. UGF12JH is an automotive-grade variant (AEC-Q101 qualified) with 1949 pieces in stock and is suitable for applications requiring automotive qualification.

Current-Rated Alternatives: BYC8X-600P,127 (8 A rating) is suitable only for applications with maximum current requirements not exceeding 8 A. BYC20X-600PQ (20 A rating) and MURF1560G (15 A rating) accommodate higher current demands and provide design margin for thermal management. These parts are interchangeable in circuits where the 12 A specification represents a design margin rather than a hard requirement.

Low Forward Voltage Option: VS-ETL1506FP-M3 (Vishay FRED Pt® series) exhibits the lowest forward voltage drop at 1.07 V @ 15 A, reducing power dissipation in high-current applications. This part is suitable for designs prioritizing efficiency and thermal performance, though its 210 ns reverse recovery time is significantly longer than the original specification.

Compliance and Availability: All substitute parts are ROHS3 compliant and REACH unaffected. UGF12J and UGF12JH maintain the original operating temperature range of -55°C to 150°C. Alternative manufacturers' parts extend the maximum junction temperature to 175°C, providing enhanced thermal headroom in demanding applications.

Frequently Asked Questions (FAQ)

Q: Can UGF12J be used as a direct replacement for UGF12J C0G? A: Yes. UGF12J is a direct equivalent with identical electrical specifications (600 V, 12 A, 2 V forward drop, 20 ns recovery time) and the same TO-220-2 Full Pack package. The primary difference is product status: UGF12J is active with higher inventory availability.

Q: What is the difference between UGF12J and UGF12JH? A: Both parts are electrically identical with 600 V, 12 A ratings and 20 ns reverse recovery time. UGF12JH is automotive-grade and AEC-Q101 qualified, making it suitable for automotive applications. Standard UGF12J is appropriate for general industrial and consumer applications.

Q: Can BYC8X-600P,127 replace UGF12J C0G? A: BYC8X-600P,127 is not a direct replacement due to its 8 A current rating versus the 12 A requirement. It is suitable only for circuits where maximum current does not exceed 8 A. The part shares the 600 V voltage rating and fast recovery speed classification.

Q: Is MURF1560G compatible with UGF12J C0G? A: MURF1560G is compatible in circuits where 15 A current capacity is acceptable. It maintains the 600 V voltage rating and TO-220-2 Full Pack package. The 60 ns reverse recovery time is longer than the original 20 ns specification, which may affect high-frequency switching performance.

Q: What is the advantage of VS-ETL1506FP-M3 over UGF12J? A: VS-ETL1506FP-M3 offers lower forward voltage drop (1.07 V @ 15 A versus 2 V @ 12 A), reducing power dissipation and heat generation. This advantage applies to high-current applications. The trade-off is significantly longer reverse recovery time (210 ns versus 20 ns), which may limit use in high-frequency switching circuits.

Q: Are all substitute parts available in the same package? A: All parts use TO-220-2 Full Pack or TO-220-2 Full Pack with isolated tab variants, which are mechanically compatible. The isolated tab option in WeEn and some onsemi parts provides additional thermal and electrical isolation flexibility without affecting pin-to-pin compatibility.

Q: What is the operating temperature range for substitute parts? A: UGF12J and UGF12JH maintain the original -55°C to 150°C range. BYC8X-600P,127, BYC20X-600PQ, MURF1560G, and VS-ETL1506FP-M3 extend the maximum junction temperature to 175°C, providing enhanced thermal margin in high-temperature environments.

Q: Can higher-rated parts (15 A or 20 A) be used in place of the 12 A UGF12J C0G? A: Yes. Higher current-rated parts are suitable for applications where the circuit current does not exceed the original 12 A specification. The higher rating provides design margin and thermal headroom. Verify that forward voltage drop and reverse recovery time characteristics are acceptable for the specific application.

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