EM1A General Purpose Rectifier Diode 600V 1A Equivalent & Substitute Parts

Part Overview

The EM1A is a general purpose rectifier diode manufactured by Sanken Electric USA Inc., rated for 600V DC reverse voltage and 1A average rectified current in an axial through-hole package. This component is classified as Active product status and is RoHS Compliant. Equivalent and substitute parts are necessary to address supply chain availability, packaging preferences, and manufacturing continuity requirements while maintaining electrical and mechanical compatibility within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	970 mV @ 1 A	mV
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	10	µA @ 600 V
Mounting Type	Through Hole	-
Package / Case	Axial	-
Operating Temperature - Junction	-40°C ~ 150°C	°C
RoHS Status	RoHS Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the EM1A are qualified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): 600V minimum
Current - Average Rectified (Io): 1A minimum
Speed: Standard Recovery >500ns, > 200mA (Io)
Mounting Type: Through Hole
Technology: Standard

Mechanical Compatibility Criteria:

Package / Case: Axial or DO-204AL (DO-41) configurations
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Compliance Criteria:

RoHS Status: RoHS3 Compliant or RoHS Compliant
ECCN: EAR99
HTSUS: 8541.10.0080

Substitute parts are grouped into two categories: (1) Direct axial package equivalents from multiple manufacturers, and (2) DO-204AL (DO-41) package alternatives that provide electrical equivalence with different mechanical form factors. All substitute parts meet or exceed the electrical specifications of the EM1A while maintaining through-hole mounting compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Package / Case	Operating Temp [°C]	RoHS Status	Product Status
EM1A	Sanken Electric USA Inc.	600	1	970 @ 1 A	10 @ 600 V	Axial	-40 ~ 150	RoHS Compliant	Active
1N4005-E3/54	Vishay General Semiconductor - Diodes Division	600	1	1100 @ 1 A	5 @ 600 V	DO-204AL, DO-41, Axial	-55 ~ 150	ROHS3 Compliant	Active
1N4005-E3/73	Vishay General Semiconductor - Diodes Division	600	1	1100 @ 1 A	5 @ 600 V	DO-204AL, DO-41, Axial	-55 ~ 150	ROHS3 Compliant	Active
1N4005-T	Diodes Incorporated	600	1	1000 @ 1 A	5 @ 600 V	DO-204AL, DO-41, Axial	-65 ~ 150	ROHS3 Compliant	Last Time Buy
1N4005-TP	Micro Commercial Co	600	1	1100 @ 1 A	5 @ 600 V	DO-204AL, DO-41, Axial	-55 ~ 150	ROHS3 Compliant	Active
1N4005G	Good-Ark Semiconductor	600	1	1100 @ 1 A	5 @ 600 V	DO-204AL, DO-41, Axial	-55 ~ 150	ROHS3 Compliant	Active
1N4005G-T	Diodes Incorporated	600	1	1000 @ 1 A	5 @ 600 V	DO-204AL, DO-41, Axial	-65 ~ 175	ROHS3 Compliant	Active
1N4005GP-E3/54	Vishay General Semiconductor - Diodes Division	600	1	1100 @ 1 A	5 @ 600 V	DO-204AL, DO-41, Axial	-65 ~ 175	ROHS3 Compliant	Active
1N4005GP-E3/73	Vishay General Semiconductor - Diodes Division	600	1	1100 @ 1 A	5 @ 600 V	DO-204AL, DO-41, Axial	-65 ~ 175	ROHS3 Compliant	Active
1N4005RLG	onsemi	600	1	1100 @ 1 A	10 @ 600 V	DO-204AL, DO-41, Axial	-65 ~ 175	ROHS3 Compliant	Not For New Designs
1N4247	Microchip Technology	600	1	1300 @ 3 A	1 @ 600 V	A, Axial	-65 ~ 175	RoHS non-compliant	Active

Engineering Selection Recommendations

Primary Substitute Recommendations (Active Status, ROHS3 Compliant):

The following parts are recommended as direct substitutes for new designs and ongoing production:

1N4005GP-E3/54 and 1N4005GP-E3/73 (Vishay General Semiconductor - Diodes Division, SUPERECTIFIER® Series): Both parts meet all electrical requirements with extended operating temperature range (-65°C ~ 175°C) and ROHS3 compliance. These are preferred for applications requiring enhanced temperature performance.
1N4005-TP (Micro Commercial Co): Meets all electrical specifications with ROHS3 compliance and Active product status. Suitable for standard applications within the -55°C ~ 150°C operating range.
1N4005G and 1N4005G-T (Good-Ark Semiconductor and Diodes Incorporated): Both provide ROHS3 compliance and Active status. The 1N4005G-T offers extended temperature range (-65°C ~ 175°C).

Secondary Substitute (Last Time Buy Status):

1N4005-T (Diodes Incorporated): Meets electrical specifications but carries Last Time Buy product status. Use only for legacy system support or when primary recommendations are unavailable.

Not Recommended:

1N4005RLG (onsemi): Carries "Not For New Designs" product status and should not be selected for new applications.
1N4247 (Microchip Technology): RoHS non-compliant status disqualifies this part from applications requiring RoHS compliance. Additionally, forward voltage specification is provided at 3A rather than 1A, making direct comparison difficult.

Frequently Asked Questions (FAQ)

Q: Can I substitute the EM1A with any 600V 1A diode?

A: No. Substitutes must meet all specified electrical parameters including voltage rating (600V minimum), current rating (1A minimum), recovery speed (Standard Recovery >500ns, > 200mA), and mounting type (Through Hole). Additionally, compliance certifications (RoHS status) and product status must be considered for your application requirements.

Q: What is the difference between the EM1A and the 1N4005 series?

A: The EM1A is an axial package diode from Sanken Electric USA Inc. The 1N4005 series comprises multiple manufacturers' implementations available in both axial and DO-204AL (DO-41) packages. All meet the same 600V 1A electrical specifications. The primary differences are packaging form factor, forward voltage characteristics, and operating temperature ranges across different manufacturer variants.

Q: Can I use a DO-204AL (DO-41) package diode in place of the axial EM1A?

A: Yes, if the application's PCB layout and mounting infrastructure support the DO-204AL (DO-41) package form factor. Electrically, parts such as 1N4005-E3/54, 1N4005-TP, and 1N4005G are fully compatible. However, physical board modifications may be required to accommodate the different package geometry.

Q: Why do some substitute parts have different forward voltage specifications?

A: Forward voltage (Vf) specifications vary by manufacturer and measurement conditions. The EM1A specifies 970 mV @ 1A, while most 1N4005 variants specify 1100 mV @ 1A. These differences fall within acceptable operating ranges for general purpose rectifier applications. The 1N4247 specifies 1300 mV @ 3A, which is measured at a different current level and is not directly comparable.

Q: Should I use the 1N4247 as a substitute?

A: The 1N4247 is not recommended as a substitute due to RoHS non-compliant status. If your application does not require RoHS compliance and you require the specific characteristics of the 1N4247, verify compatibility with your system requirements before selection.

Q: What does "Last Time Buy" product status mean?

A: "Last Time Buy" indicates that the manufacturer will no longer produce the part after a specified date. The 1N4005-T carries this status. While currently available, this part should not be selected for new designs or long-term production requirements. Use only for legacy system maintenance or when primary recommendations are exhausted.

Q: Are all substitute parts ROHS3 compliant?

A: No. The 1N4247 is RoHS non-compliant. All other recommended substitutes carry either RoHS Compliant or ROHS3 Compliant status. Verify compliance requirements for your specific application before part selection.

Q: What is the significance of the reverse leakage current difference between EM1A and substitute parts?

A: The EM1A specifies 10 µA @ 600V reverse leakage, while most 1N4005 variants specify 5 µA @ 600V. Lower reverse leakage indicates better diode quality and lower standby current consumption. The 1N4247 specifies only 1 µA @ 600V. For most general purpose applications, these differences are not critical, but high-impedance or low-power circuits may benefit from lower leakage specifications.

Q: Can I mix different substitute parts in the same circuit board?

A: Yes, provided all selected parts meet the minimum electrical specifications for your application. However, for consistency in manufacturing, testing, and long-term reliability tracking, using a single part number across a design is recommended.

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