CMR1-10M BK Equivalent & Substitute Parts

Part Overview

The CMR1-10M BK is a general-purpose rectifier diode manufactured by Central Semiconductor Corp, rated for 1000 V DC reverse voltage and 1 A average rectified current in a surface mount SMA package (DO-214AC). This component is classified as Active product status and utilizes standard recovery technology. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and operational parameters to ensure direct functional replacement in circuit applications.

Key Parameters

Parameter	CMR1-10M BK Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Speed Classification	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	5 µA @ 1000 V
Capacitance @ Vr, F	8 pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-65°C ~ 150°C
Technology	Standard

Substitute Part Grouping Explanation

Substitute parts for the CMR1-10M BK are identified based on the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): 1000 V minimum
Current - Average Rectified (Io): 1 A minimum
Voltage - Forward (Vf) (Max) @ If: Must not exceed 1.1 V @ 1 A for standard recovery devices
Current - Reverse Leakage @ Vr: 5 µA @ 1000 V or lower

Package and Mounting Requirements:

Package / Case: DO-214AC (SMA) or compatible surface mount package
Mounting Type: Surface Mount

Operational Requirements:

Operating Temperature - Junction: Must support -65°C minimum or -55°C minimum with application verification
Technology: Standard or Fast Recovery classification acceptable
Product Status: Active

Substitute parts are grouped into two categories: Direct SMA Package Substitutes (identical package) and Alternative Package Substitutes (SMB package with equivalent electrical performance). Fast Recovery variants are included where reverse recovery time specifications are provided and do not conflict with circuit requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Reverse Leakage @ Vr	Package	Temp Range	RoHS Status
CMR1-10M BK	Central Semiconductor Corp	1000 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns	5 µA @ 1000 V	DO-214AC, SMA	-65°C ~ 150°C	REACH Unaffected
ACGRA4007-HF	Comchip Technology	1000 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns	5 µA @ 1000 V	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
CURA107-G	Comchip Technology	1000 V	1 A	1.7 V @ 1 A	Fast Recovery ≤500ns	5 µA @ 1000 V	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
GS1M-LTP	Micro Commercial Co	1000 V	1 A	1.0 V @ 1 A	Standard Recovery >500ns	10 µA @ 1000 V	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
RS1M	EVVO Semi	1000 V	1 A	1.3 V @ 1 A	Fast Recovery ≤500ns	5 µA @ 1 kV	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
RS1M-13-F	Diodes Incorporated	1000 V	1 A	1.3 V @ 1 A	Fast Recovery ≤500ns	5 µA @ 1000 V	DO-214AC, SMA	-65°C ~ 150°C	ROHS3 Compliant
RS1MB-13-F	Diodes Incorporated	1000 V	1 A	1.3 V @ 1 A	Fast Recovery ≤500ns	5 µA @ 1000 V	DO-214AA, SMB	-65°C ~ 150°C	ROHS3 Compliant
S1M-13-F	Diodes Incorporated	1000 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns	5 µA @ 1000 V	DO-214AC, SMA	-65°C ~ 150°C	ROHS3 Compliant
S1M-E3/5AT	Vishay General Semiconductor - Diodes Division	1000 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns	5 µA @ 1000 V	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
S1M-E3/61T	Vishay General Semiconductor - Diodes Division	1000 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns	5 µA @ 1000 V	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
S1M-M3/5AT	Vishay General Semiconductor - Diodes Division	1000 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns	5 µA @ 1000 V	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical and Package Specifications):

The following parts provide direct substitution with matching voltage, current, forward voltage, and standard recovery speed characteristics:

S1M-13-F (Diodes Incorporated): Matches CMR1-10M BK electrical specifications exactly. Supports extended temperature range -65°C ~ 150°C. ROHS3 Compliant. Highest inventory availability (190,400 pcs).
ACGRA4007-HF (Comchip Technology): Matches electrical specifications with AEC-Q101 automotive qualification. Temperature range -55°C ~ 150°C. ROHS3 Compliant.
S1M-E3/61T (Vishay General Semiconductor - Diodes Division): Matches electrical specifications. Temperature range -55°C ~ 150°C. ROHS3 Compliant. High inventory (100,100 pcs).
S1M-E3/5AT (Vishay General Semiconductor - Diodes Division): Matches electrical specifications. Temperature range -55°C ~ 150°C. ROHS3 Compliant.
S1M-M3/5AT (Vishay General Semiconductor - Diodes Division): Matches electrical specifications. Tape & Reel packaging. Temperature range -55°C ~ 150°C. ROHS3 Compliant.

Acceptable Substitutes (Equivalent Electrical Performance with Minor Variations):

GS1M-LTP (Micro Commercial Co): Forward voltage 1.0 V @ 1 A (lower than CMR1-10M BK). Reverse leakage 10 µA @ 1000 V (higher than CMR1-10M BK). Standard recovery speed. Temperature range -55°C ~ 150°C. ROHS3 Compliant. High inventory (88,005 pcs).
RS1M-13-F (Diodes Incorporated): Fast recovery technology (≤500ns). Forward voltage 1.3 V @ 1 A (higher than CMR1-10M BK). Temperature range -65°C ~ 150°C. ROHS3 Compliant. Highest inventory availability (189,953 pcs).
RS1M (EVVO Semi): Fast recovery technology (≤500ns). Forward voltage 1.3 V @ 1 A. Temperature range -55°C ~ 150°C. ROHS3 Compliant.

Alternative Package Substitute (SMB Package):

RS1MB-13-F (Diodes Incorporated): Equivalent electrical specifications to RS1M-13-F in DO-214AA (SMB) package instead of SMA. Suitable for applications where SMB footprint is acceptable. Temperature range -65°C ~ 150°C. ROHS3 Compliant.

Fast Recovery Variant (Different Technology Classification):

CURA107-G (Comchip Technology): Ultrafast recovery (75 ns). Forward voltage 1.7 V @ 1 A (significantly higher than CMR1-10M BK). Use only in applications where fast recovery is required and higher forward voltage is acceptable.

All substitute parts listed are Active product status and REACH Unaffected or ROHS3 Compliant, ensuring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can RS1M-13-F replace CMR1-10M BK directly?

A: RS1M-13-F is electrically compatible with CMR1-10M BK in terms of voltage and current ratings. Both support 1000 V reverse voltage and 1 A average rectified current. The primary difference is that RS1M-13-F uses fast recovery technology (500 ns) compared to CMR1-10M BK's standard recovery (>500ns), and has a forward voltage of 1.3 V @ 1 A versus 1.1 V @ 1 A. Direct substitution is acceptable in most applications; however, circuits sensitive to recovery time or forward voltage drop should be evaluated.

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

A: Standard recovery diodes have reverse recovery times greater than 500 ns, while fast recovery diodes have reverse recovery times of 500 ns or less. Fast recovery diodes switch off more quickly when reverse biased, reducing switching losses in high-frequency applications. Standard recovery diodes are suitable for lower-frequency rectification and general-purpose applications.

Q: Can I use GS1M-LTP as a substitute for CMR1-10M BK?

A: GS1M-LTP is compatible with CMR1-10M BK for voltage and current specifications. GS1M-LTP has a lower forward voltage (1.0 V @ 1 A) and higher reverse leakage current (10 µA @ 1000 V) compared to CMR1-10M BK (1.1 V @ 1 A and 5 µA @ 1000 V). These differences are within acceptable ranges for general-purpose rectification. Substitution is acceptable in applications where the higher reverse leakage does not impact circuit performance.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 Compliant or REACH Unaffected, meeting current environmental and regulatory requirements. CMR1-10M BK is REACH Unaffected.

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

A: SMA (DO-214AC) and SMB (DO-214AA) are both surface mount diode packages. SMB is physically larger than SMA, providing higher current handling capability in some applications. Both packages are compatible with standard PCB assembly processes. RS1MB-13-F is available in SMB package as an alternative to SMA-packaged substitutes if board space permits or if higher thermal dissipation is required.

Q: Which substitute part has the best temperature range coverage?

A: S1M-13-F, RS1M-13-F, and RS1MB-13-F all support the extended temperature range of -65°C ~ 150°C, matching CMR1-10M BK's operating temperature range. Other substitutes support -55°C ~ 150°C, which is acceptable for most commercial and industrial applications.

Q: Can CURA107-G replace CMR1-10M BK?

A: CURA107-G is rated for 1000 V and 1 A, matching CMR1-10M BK's voltage and current specifications. However, CURA107-G has a significantly higher forward voltage (1.7 V @ 1 A) and ultrafast recovery (75 ns). This part is suitable only for applications where fast recovery is required and the higher forward voltage drop is acceptable. It is not recommended as a general-purpose substitute.

Q: What inventory levels are available for substitute parts?

A: Inventory availability varies by part number. RS1M-13-F has the highest availability (189,953 pcs), followed by S1M-13-F (190,400 pcs). GS1M-LTP has 88,005 pcs, and RS1M has 75,180 pcs. ACGRA4007-HF has 58,834 pcs. Vishay parts (S1M-E3/61T, S1M-E3/5AT, S1M-M3/5AT) have inventory ranging from 23,760 to 100,100 pcs. CURA107-G has 13,182 pcs, and RS1MB-13-F has 24,248 pcs.

Q: Are there any automotive-qualified substitutes?

A: ACGRA4007-HF is qualified to AEC-Q101 automotive standard, making it suitable for automotive applications requiring certified components.

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