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US1J-13 Equivalent & Substitute Parts
Part Overview
The US1J-13 is a general-purpose rectifier diode rated for 600 V DC reverse voltage and 1 A average rectified current in a surface mount SMA package (DO-214AC). This component is classified as discontinued at DiGi Electronics, indicating that direct procurement of the original part number is no longer available through standard distribution channels. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure uninterrupted supply for production and repair applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - DC Reverse (Vr) (Max) | 600 | V |
| Current - Average Rectified (Io) | 1 | A |
| Voltage - Forward (Vf) (Max) @ If | 1.7 V @ 1 A | V |
| Speed Classification | Fast Recovery ≤ 500ns, > 200mA (Io) | — |
| Reverse Recovery Time (trr) | 75 | ns |
| Current - Reverse Leakage @ Vr | 5 | µA @ 600 V |
| Capacitance @ Vr, F | 10 | pF @ 4V, 1MHz |
| Package / Case | DO-214AC, SMA | — |
| Mounting Type | Surface Mount | — |
| Operating Temperature - Junction | -65 to 150 | °C |
| RoHS Status | RoHS non-compliant | — |
Substitute Part Grouping Explanation
Substitution of the US1J-13 is determined by strict equivalence across the following critical parameters:
Mandatory Equivalence Parameters:
- Voltage - DC Reverse (Vr) (Max): 600 V
- Current - Average Rectified (Io): 1 A
- Package / Case: DO-214AC, SMA
- Mounting Type: Surface Mount
Performance Parameters (Allowable Variation):
- Voltage - Forward (Vf) (Max) @ If: Range 1.0 V to 1.7 V @ 1 A
- Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns)
- Reverse Recovery Time (trr): 35 ns to 2000 ns
- Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 600 V
- Operating Temperature - Junction: Minimum -65°C, Maximum 150°C or higher
Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical performance) and Manufacturer Recommended Alternatives (functionally compatible with allowable parameter variations).
Parameter Comparison
| Part Number | Manufacturer | Vr (Max) [V] | Io [A] | Vf (Max) @ 1A [V] | Speed | trr [ns] | Ir @ 600V [µA] | Tj (Min-Max) [°C] | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| US1J-13 | Diodes Incorporated | 600 | 1 | 1.7 | Fast Recovery ≤ 500ns | 75 | 5 | -65 to 150 | Discontinued | RoHS non-compliant |
| US1J-13-F | Diodes Incorporated | 600 | 1 | 1.7 | Fast Recovery ≤ 500ns | 75 | 5 | -65 to 150 | Active | ROHS3 Compliant |
| CSFA105-G | Comchip Technology | 600 | 1 | 1.5 | Fast Recovery ≤ 500ns | 35 | 5 | -55 to 150 | Active | ROHS3 Compliant |
| ES1J | HY Electronic (Cayman) Limited | 600 | 1 | 1.7 | Fast Recovery ≤ 500ns | 35 | 5 | -55 to 150 | Active | RoHS Compliant |
| ES1J-LTP | Micro Commercial Co | 600 | 1 | 1.7 | Fast Recovery ≤ 500ns | 35 | 5 | -65 to 175 | Active | ROHS3 Compliant |
| GF1J | onsemi | 600 | 1 | 1.0 | Standard Recovery > 500ns | 2000 | 5 | -65 to 175 | Not For New Designs | ROHS3 Compliant |
| GS1J-LTP | Micro Commercial Co | 600 | 1 | 1.0 | Standard Recovery > 500ns | — | 10 | -55 to 150 | Active | ROHS3 Compliant |
| HS1J | Good-Ark Semiconductor | 600 | 1 | 1.7 | Fast Recovery ≤ 500ns | 75 | 5 | -55 to 150 | Active | ROHS3 Compliant |
| MRA4005T1G | onsemi | 600 | 1 | 1.1 | Standard Recovery > 500ns | — | 10 | -55 to 175 | Not For New Designs | ROHS3 Compliant |
| MRA4005T3G | onsemi | 600 | 1 | 1.1 | Standard Recovery > 500ns | — | 10 | -55 to 175 | Not For New Designs | ROHS3 Compliant |
| RS1J | Taiwan Semiconductor Corporation | 600 | 1 | 1.3 | Fast Recovery ≤ 500ns | 250 | 5 | -55 to 150 | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitute (Parametric Equivalent):
US1J-13-F is the direct parametric equivalent to US1J-13. Both parts share identical electrical specifications: 600 V reverse voltage, 1 A average rectified current, 1.7 V forward voltage drop at 1 A, 75 ns reverse recovery time, and 5 µA reverse leakage current. The primary distinction is product status and compliance: US1J-13-F is active in production and ROHS3 compliant, whereas US1J-13 is discontinued and RoHS non-compliant. US1J-13-F is the recommended direct replacement for new designs and existing applications requiring component refresh.
Fast Recovery Alternatives (Active Status):
ES1J-LTP, CSFA105-G, HS1J, and RS1J are fast recovery diodes with 600 V / 1 A ratings and active product status. These parts maintain the fast recovery speed classification (≤ 500ns) of the original US1J-13. ES1J-LTP offers the widest operating temperature range (-65°C to 175°C) and is ROHS3 compliant. CSFA105-G features the lowest reverse recovery time (35 ns) and lowest forward voltage drop (1.5 V). HS1J matches the original reverse recovery time specification (75 ns) and forward voltage (1.7 V). RS1J provides a mid-range reverse recovery time (250 ns) with 1.3 V forward voltage. All four parts are suitable for applications requiring fast switching characteristics.
Standard Recovery Alternatives (Active Status):
GS1J-LTP is an active standard recovery diode with 600 V / 1 A rating and 1.0 V forward voltage drop. This part exhibits slower switching characteristics (> 500ns recovery) compared to the original US1J-13 and is appropriate for applications where switching speed is not a critical constraint.
Legacy Parts (Not For New Designs):
GF1J and MRA4005T1G/MRA4005T3G are classified as "Not For New Designs" by their manufacturers. These parts are functionally compatible but should not be selected for new product development. They remain available for legacy system support and repair applications only.
Frequently Asked Questions (FAQ)
Q: Can US1J-13-F be used as a direct replacement for US1J-13?
A: Yes. US1J-13-F is a parametric equivalent with identical electrical specifications. The part numbers differ only in suffix designation. US1J-13-F is the active production variant and is recommended for all applications.
Q: What is the difference between fast recovery and standard recovery diodes in this product category?
A: Fast recovery diodes (US1J-13, US1J-13-F, CSFA105-G, ES1J, ES1J-LTP, HS1J, RS1J) have reverse recovery times ≤ 500 ns and are suitable for high-frequency switching applications. Standard recovery diodes (GF1J, GS1J-LTP, MRA4005T1G, MRA4005T3G) have reverse recovery times > 500 ns and are appropriate for lower-frequency or non-switching applications. Selection depends on circuit switching frequency requirements.
Q: Are all substitute parts RoHS compliant?
A: All active substitute parts listed are ROHS3 compliant. The original US1J-13 is RoHS non-compliant. If RoHS compliance is a design requirement, any of the active substitute parts satisfy this criterion.
Q: What is the significance of operating temperature range differences?
A: The original US1J-13 operates from -65°C to 150°C. ES1J-LTP extends the upper limit to 175°C, providing additional thermal margin in high-temperature environments. Most other substitutes operate to 150°C or 175°C. Selection should account for the specific thermal environment of the application.
Q: Can I use a standard recovery diode (GS1J-LTP) in place of a fast recovery diode (US1J-13)?
A: Standard recovery diodes are electrically compatible in terms of voltage and current ratings but exhibit significantly slower switching behavior (2000 ns vs. 75 ns reverse recovery time). Substitution is permissible only in applications where switching frequency is low and the slower recovery time does not degrade circuit performance. High-frequency switching applications require fast recovery variants.
Q: What is the difference between forward voltage drop specifications across these parts?
A: Forward voltage drops range from 1.0 V (GF1J, GS1J-LTP) to 1.7 V (US1J-13, US1J-13-F, ES1J, ES1J-LTP, HS1J). Lower forward voltage reduces power dissipation and heat generation. Selection should account for power budget and thermal design constraints. CSFA105-G offers a moderate 1.5 V drop with fast recovery characteristics.
Q: Are there packaging differences between substitute parts?
A: All substitute parts use the DO-214AC (SMA) surface mount package, which is mechanically and electrically compatible with the original US1J-13. Packaging variations exist only in distribution format (Cut Tape, Digi-Reel, or Tape & Reel), which does not affect component functionality or PCB assembly compatibility.
Q: Why are some parts marked "Not For New Designs"?
A: Parts designated "Not For New Designs" (GF1J, MRA4005T1G, MRA4005T3G) are mature products that manufacturers are transitioning out of active promotion. These parts remain available for legacy system support and repair but should not be selected for new product development. Active alternatives provide better long-term supply assurance and support.
Q: What is reverse leakage current and why does it vary?
A: Reverse leakage current is the small current that flows through the diode when reverse biased. The original US1J-13 and most substitutes specify 5 µA at 600 V. GS1J-LTP and MRA4005 variants specify 10 µA. Higher leakage current increases standby power consumption. Selection should account for circuit standby power requirements.
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