FR1M-13-F Equivalent & Substitute Parts

Part Overview

The FR1M-13-F is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 1000 V DC reverse voltage and 1 A average rectified current in a Surface Mount SMB (DO-214AA) package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement needs. Substitute parts are selected based on matching or exceeding electrical performance parameters while maintaining mechanical compatibility with the SMB package format.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 1	V @ A
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5 @ 1000	µA @ V
Package / Case	DO-214AA, SMB
Operating Temperature - Junction	-65 to 175	°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the FR1M-13-F are categorized based on electrical parameter compatibility within the rectifier diode classification. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 1000 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Package / Case: Must be DO-214AA or SMB equivalent
Mounting Type: Must be Surface Mount
RoHS Status: Must maintain ROHS3 Compliance
Moisture Sensitivity Level: Must be MSL 1 or equivalent

Secondary Parameters Affecting Substitution Suitability:

Voltage - Forward (Vf): Lower values indicate improved efficiency
Reverse Recovery Time (trr): Affects switching performance in high-frequency applications
Current - Reverse Leakage: Lower values indicate superior blocking characteristics
Operating Temperature Range: Wider ranges provide greater design flexibility
Product Status: Active status ensures ongoing availability

Substitute parts are grouped into two categories: Direct Equivalents (matching all critical parameters) and Enhanced Substitutes (exceeding current or voltage ratings while maintaining package compatibility).

Parameter Comparison

Parameter	FR1M-13-F	RS1MB-13-F	ACGRB207-HF	S1M-LTP	STTH208U	UF1M-TP
Manufacturer	Diodes Inc.	Diodes Inc.	Comchip Tech.	Micro Commercial	STMicroelectronics	Micro Commercial
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	1000 V	800 V	1000 V
Current - Average Rectified (Io)	1 A	1 A	2 A	1 A	2 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.3 V @ 1 A	1.1 V @ 3 A	1.1 V @ 1 A	1.65 V @ 2 A	Not Specified
Reverse Recovery Time (trr)	500 ns	500 ns	Not Specified	2 µs	75 ns	100 ns
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	5 µA @ 1000 V	5 µA @ 1000 V	5 µA @ 1000 V	5 µA @ 800 V	10 µA @ 1000 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature - Junction	-65 to 175°C	-65 to 150°C	-55 to 150°C	-55 to 150°C	Max 175°C	-50 to 150°C
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: RS1MB-13-F

The RS1MB-13-F from Diodes Incorporated is the recommended primary substitute for the obsolete FR1M-13-F. This part maintains identical electrical specifications (1000 V, 1 A, 500 ns recovery time) and package format while offering active product status and continuous availability. The RS1MB-13-F is ROHS3 compliant and carries MSL 1 rating, ensuring compatibility with existing design requirements. The operating temperature range of -65°C to 150°C covers the majority of standard industrial applications, with the upper limit 25°C lower than the original part.

Secondary Substitute: UF1M-TP

The UF1M-TP from Micro Commercial Co provides a 1000 V, 1A rated substitute with improved reverse recovery time (100 ns versus 500 ns), offering superior high-frequency performance characteristics. This part is suitable for applications requiring faster switching response. The operating temperature range (-50°C to 150°C) is narrower than the original specification but remains adequate for most commercial and industrial environments. ROHS3 compliance and MSL 1 rating are maintained.

Secondary Substitute: S1M-LTP

The S1M-LTP from Micro Commercial Co matches the 1000 V, 1 A electrical ratings with standard recovery characteristics (>500 ns). Forward voltage is reduced to 1.1 V at 1 A, providing improved efficiency in power dissipation. This part is suitable for applications where thermal management is a design consideration. Operating temperature range is -55°C to 150°C with full ROHS3 compliance.

Enhanced Substitutes: ACGRB207-HF and STTH208U

The ACGRB207-HF (Comchip Technology) and STTH208U (STMicroelectronics) are enhanced substitutes offering increased current ratings (2 A) compared to the original 1 A specification. These parts are suitable for applications requiring higher current capacity within the same package footprint. The ACGRB207-HF maintains 1000 V rating with AEC-Q101 automotive qualification. The STTH208U operates at 800 V with fast recovery characteristics (75 ns), suitable for applications where voltage margin is available and switching speed is critical.

Voltage Derating Consideration:

The STTH208U operates at 800 V maximum reverse voltage, which is 200 V below the original FR1M-13-F specification. This part is suitable only for applications where the circuit design voltage does not exceed 800 V.

Frequently Asked Questions (FAQ)

Q: Can RS1MB-13-F directly replace FR1M-13-F in all applications?

A: Yes. The RS1MB-13-F maintains identical electrical specifications (1000 V, 1 A, 500 ns recovery time) and SMB package format. The primary difference is product status (active versus obsolete) and a 25°C reduction in maximum junction temperature (150°C versus 175°C). For applications operating below 150°C junction temperature, direct substitution is valid.

Q: What is the difference between fast recovery and standard recovery diodes in this comparison?

A: Recovery time indicates the speed at which the diode transitions from conducting to blocking state. Fast recovery diodes (≤500 ns) are suitable for high-frequency switching applications. Standard recovery diodes (>500 ns) are appropriate for lower-frequency rectification. The FR1M-13-F specifies 500 ns (fast recovery boundary). UF1M-TP (100 ns) and STTH208U (75 ns) offer superior switching performance, while S1M-LTP (2 µs) is optimized for standard rectification.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts listed are packaged in DO-214AA (SMB) surface mount format, maintaining mechanical compatibility with the original FR1M-13-F footprint and assembly process.

Q: Which substitute offers the lowest forward voltage drop?

A: The ACGRB207-HF specifies 1.1 V forward voltage at 3 A, and S1M-LTP specifies 1.1 V at 1 A. Both offer improved efficiency compared to the FR1M-13-F specification of 1.3 V at 1 A. For 1 A applications, S1M-LTP provides the lowest forward voltage specification.

Q: Is the STTH208U suitable for 1000 V applications?

A: No. The STTH208U is rated for 800 V maximum reverse voltage. This part is suitable only for applications where the circuit design voltage does not exceed 800 V. For applications requiring 1000 V rating, select from RS1MB-13-F, UF1M-TP, S1M-LTP, or ACGRB207-HF.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 indicates unlimited shelf life without moisture baking requirements. All listed substitute parts carry MSL 1 rating, ensuring compatibility with standard storage and handling procedures without special moisture control measures.

Q: Can I use ACGRB207-HF or STTH208U as direct replacements if my application only requires 1 A current?

A: Yes, with considerations. Both parts are rated for 2 A and will operate safely at 1 A. The ACGRB207-HF maintains 1000 V rating and is suitable for direct substitution. The STTH208U operates at 800 V, which is acceptable only if your circuit design voltage does not exceed 800 V. Both parts are ROHS3 compliant with MSL 1 rating.

Q: What is the operating temperature range limitation for each substitute?

A: RS1MB-13-F: -65°C to 150°C; UF1M-TP: -50°C to 150°C; S1M-LTP: -55°C to 150°C; ACGRB207-HF: -55°C to 150°C; STTH208U: Maximum 175°C (no minimum specified). The original FR1M-13-F specifies -65°C to 175°C. For applications requiring operation below -50°C or above 150°C, verify substitute suitability against specific design requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, maintaining environmental and regulatory compliance equivalent to the original FR1M-13-F.

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