FR1J-13 Equivalent & Substitute Parts

Part Overview

The FR1J-13 is a fast recovery rectifier diode manufactured by Diodes Incorporated, rated for 600 V DC reverse voltage and 1 A average rectified current in a surface mount SMB package (DO-214AA). This component is classified as discontinued at DiGi Electronics, indicating limited availability through primary distribution channels. The part operates across a junction temperature range of -65°C to 175°C and features a reverse recovery time of 250 ns, characteristic of fast recovery diode technology.

Identification of equivalent and substitute parts is necessary due to the discontinued product status. Active alternatives with matching or superior electrical characteristics and compatible packaging are available from multiple manufacturers, ensuring design continuity and supply chain reliability.

Key Parameters

Parameter	FR1J-13 Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 1 A	V
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 175	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the FR1J-13 is determined by the following critical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 600 V minimum
Current - Average Rectified (Io): 1 A minimum
Package / Case: DO-214AA (SMB) or DO-214AC (SMA) for surface mount compatibility
Mounting Type: Surface Mount

Performance Characteristics:

Speed Classification: Fast Recovery (≤ 500ns, > 200mA) or Standard Recovery (>500ns)
Reverse Recovery Time (trr): Specified value determines switching performance
Voltage - Forward (Vf) (Max) @ If: Forward voltage drop at rated current
Current - Reverse Leakage @ Vr: Leakage current at maximum reverse voltage

Compliance & Availability:

Product Status: Active status ensures ongoing supply
RoHS Status: ROHS3 Compliant preferred for regulatory alignment
Moisture Sensitivity Level (MSL): 1 (Unlimited) for handling compatibility

Substitute parts are grouped into two categories: Direct Equivalents (matching 1 A current rating and SMB package) and Higher Current Alternatives (2 A or 3 A ratings in SMB package, suitable for applications with current margin requirements).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Speed	Package	Temp Range [°C]	Product Status	RoHS
FR1J-13	Diodes Incorporated	600	1	1.3 @ 1 A	250	Fast Recovery ≤ 500ns	DO-214AA (SMB)	-65 to 175	Discontinued	Non-compliant
S1JB-13-F	Diodes Incorporated	600	1	1.1 @ 1 A	3000	Standard Recovery >500ns	DO-214AA (SMB)	-65 to 150	Active	ROHS3 Compliant
CMR1F-06M TR13 PBFREE	Central Semiconductor Corp	600	1	1.3 @ 1 A	250	Fast Recovery ≤ 500ns	DO-214AC (SMA)	-65 to 150	Active	ROHS3 Compliant
ER1J-LTP	Micro Commercial Co	600	1	1.7 @ 1 A	35	Fast Recovery ≤ 500ns	DO-214AA (SMB)	-65 to 175	Active	ROHS3 Compliant
STTH1L06U	STMicroelectronics	600	1	1.3 @ 1 A	80	Fast Recovery ≤ 500ns	DO-214AA (SMB)	-65 to 175	Active	ROHS3 Compliant
STTH1R06U	STMicroelectronics	600	1	1.7 @ 1 A	45	Fast Recovery ≤ 500ns	DO-214AA (SMB)	-65 to 175	Active	ROHS3 Compliant
STTH2L06U	STMicroelectronics	600	2	1.3 @ 2 A	85	Fast Recovery ≤ 500ns	DO-214AA (SMB)	-65 to 175	Active	ROHS3 Compliant
STTH2R06U	STMicroelectronics	600	2	1.7 @ 2 A	50	Fast Recovery ≤ 500ns	DO-214AA (SMB)	-40 to 175	Active	ROHS3 Compliant
STTH3L06U	STMicroelectronics	600	3	1.3 @ 3 A	85	Fast Recovery ≤ 500ns	DO-214AA (SMB)	-65 to 175	Active	ROHS3 Compliant
STTH3R06U	STMicroelectronics	600	3	1.7 @ 3 A	35	Fast Recovery ≤ 500ns	DO-214AA (SMB)	-65 to 175	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (1 A Rating, SMB Package):

The following parts provide direct functional replacement for the FR1J-13 with active product status and ROHS3 compliance:

STTH1L06U (STMicroelectronics): Matches forward voltage (1.3 V @ 1 A) and fast recovery speed. Offers improved reverse recovery time (80 ns vs. 250 ns) and extended junction temperature range (-65°C to 175°C). Recommended for applications requiring fast switching performance with thermal margin.
STTH1R06U (STMicroelectronics): Provides fast recovery characteristics with 45 ns reverse recovery time. Forward voltage is 1.7 V @ 1 A, suitable for applications where forward voltage drop is not critical. Extended junction temperature range (-65°C to 175°C).
ER1J-LTP (Micro Commercial Co): Maintains fast recovery speed with 35 ns reverse recovery time. Forward voltage is 1.7 V @ 1 A. Supports full junction temperature range (-65°C to 175°C). Lower inventory availability (937 pcs) compared to STMicroelectronics alternatives.
CMR1F-06M TR13 PBFREE (Central Semiconductor Corp): Matches forward voltage (1.3 V @ 1 A) and reverse recovery time (250 ns) of the original part. Package is DO-214AC (SMA) instead of SMB; physical dimensions differ. Suitable for designs where SMA footprint is acceptable. Junction temperature range limited to -65°C to 150°C.
S1JB-13-F (Diodes Incorporated): Same manufacturer as original part. Standard recovery diode with 3000 ns reverse recovery time; not suitable for fast switching applications. Forward voltage is 1.1 V @ 1 A. Junction temperature range -65°C to 150°C. Recommended only for non-switching rectification applications.

Higher Current Alternatives (2 A and 3 A Ratings, SMB Package):

For applications requiring current margin or higher current capacity:

STTH2L06U and STTH2R06U (STMicroelectronics, 2 A): Provide 2 A current rating in SMB package with fast recovery characteristics. STTH2L06U offers 1.3 V forward voltage @ 2 A; STTH2R06U offers 1.7 V @ 2 A. Both support -65°C to 175°C junction temperature range.
STTH3L06U and STTH3R06U (STMicroelectronics, 3 A): Provide 3 A current rating in SMB package with fast recovery characteristics. STTH3L06U offers 1.3 V forward voltage @ 3 A; STTH3R06U offers 1.7 V @ 3 A. Both support -65°C to 175°C junction temperature range.

Compliance Considerations:

All recommended substitutes are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The original FR1J-13 is RoHS non-compliant; substitution with compliant alternatives is recommended for new designs and long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can the S1JB-13-F replace the FR1J-13 in all applications?

A: The S1JB-13-F is electrically compatible in terms of voltage and current ratings but differs in speed classification. The S1JB-13-F is a standard recovery diode (3000 ns reverse recovery time) versus the FR1J-13 fast recovery diode (250 ns). Substitution is valid only for applications where switching speed is not critical, such as general-purpose rectification. Fast switching applications require a fast recovery substitute such as STTH1L06U or STTH1R06U.

Q: What is the difference between SMB and SMA packages?

A: SMB (DO-214AA) and SMA (DO-214AC) are both surface mount packages but differ in physical dimensions. SMB is larger than SMA. The CMR1F-06M TR13 PBFREE uses SMA packaging; it cannot be directly substituted on a PCB designed for SMB without footprint modification. Verify PCB layout compatibility before selection.

Q: Why do some substitutes have higher forward voltage (1.7 V vs. 1.3 V)?

A: Forward voltage variation is a characteristic of different semiconductor manufacturing processes and die designs. Higher forward voltage results in greater power dissipation (P = Vf × I). Selection between 1.3 V and 1.7 variants depends on thermal design and power budget. For applications sensitive to heat generation, select the 1.3 V variant (STTH1L06U, STTH2L06U, STTH3L06U).

Q: Can I use a 2 A or 3 A rated diode in place of the 1 A FR1J-13?

A: Yes. Higher current-rated diodes (STTH2L06U, STTH2R06U, STTH3L06U, STTH3R06U) are electrically compatible with 1 A applications. They provide current margin and typically offer improved reverse recovery time. Physical package remains SMB (DO-214AA), ensuring footprint compatibility. This substitution is valid for applications where increased current capacity provides design benefit.

Q: What does reverse recovery time (trr) mean for my application?

A: Reverse recovery time is the interval required for a forward-conducting diode to stop conducting when reverse voltage is applied. Shorter trr (35–85 ns in fast recovery substitutes) reduces switching losses and electromagnetic interference, critical in high-frequency switching applications. Longer trr (250 ns or 3000 ns) is acceptable in low-frequency or non-switching rectification circuits.

Q: Are all recommended substitutes available in the same packaging format?

A: Most substitutes are available in Cut Tape (CT) and Digi-Reel® or Tape & Reel (TR) formats. The CMR1F-06M TR13 PBFREE is available in Tape & Reel only. Verify packaging availability with your supplier to ensure compatibility with assembly processes.

Q: What is the significance of ROHS3 compliance?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. The original FR1J-13 is RoHS non-compliant. All recommended substitutes are ROHS3 compliant, ensuring regulatory alignment for new designs and export to regions with RoHS requirements.

Q: Which substitute offers the best overall performance match to the FR1J-13?

A: STTH1L06U (STMicroelectronics) provides the closest performance match: identical forward voltage (1.3 V @ 1 A), fast recovery speed (80 ns trr), SMB package compatibility, and extended junction temperature range (-65°C to 175°C). It is also available in high inventory (6552 pcs), ensuring supply reliability.

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