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STPR120A Equivalent & Substitute Parts
Part Overview
The STPR120A is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 200 V DC reverse voltage and 1 A average rectified current in a surface mount SMA (DO-214AC) package. This part is classified as obsolete, indicating it is no longer in active production. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - DC Reverse (Vr) (Max) | 200 | V |
| Current - Average Rectified (Io) | 1 | A |
| Voltage - Forward (Vf) (Max) @ If | 940 mV @ 1 A | mV |
| Speed | Fast Recovery ≤ 500ns, > 200mA (Io) | — |
| Reverse Recovery Time (trr) | 35 | ns |
| Current - Reverse Leakage @ Vr | 3 | µA @ 200 V |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AC, SMA | — |
| Operating Temperature - Junction (Max) | 150 | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the STPR120A are selected based on the following critical electrical and mechanical parameters:
Primary Substitution Criteria:
- Voltage - DC Reverse (Vr) (Max): 200 V minimum
- Current - Average Rectified (Io): 1 A minimum
- Mounting Type: Surface Mount
- Package / Case: DO-214AC (SMA) or compatible surface mount package
- Technology: Standard rectifier diode
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
Secondary Compatibility Factors:
- Reverse Recovery Time (trr): ≤ 500 ns (fast recovery)
- Forward Voltage (Vf): Comparable performance at rated current
- Reverse Leakage Current: ≤ 10 µA @ 200 V
- Operating Temperature Range: Support for junction temperatures up to 150°C minimum
Parts are grouped into two categories: direct electrical equivalents (matching 200 V / 1 A specifications) and enhanced-performance alternatives (higher current ratings or improved thermal characteristics). All substitute parts maintain compliance with RoHS3 and MSL 1 requirements.
Parameter Comparison
| Part Number | Manufacturer | Vr (Max) [V] | Io [A] | Vf (Max) @ If [mV] | trr [ns] | Ir @ Vr [µA] | Package | Tj (Max) [°C] | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| STPR120A | STMicroelectronics | 200 | 1 | 940 @ 1 A | 35 | 3 @ 200 V | DO-214AC (SMA) | 150 | Obsolete |
| STTH1R02A | STMicroelectronics | 200 | 1.5 | 1000 @ 1.5 A | 30 | 3 @ 200 V | DO-214AC (SMA) | 175 | Active |
| CGRA4003-G | Comchip Technology | 200 | 1 | 1100 @ 1 A | — | 5 @ 200 V | DO-214AC (SMA) | 150 | Active |
| EGF1D | onsemi | 200 | 1 | 1000 @ 1 A | 50 | 10 @ 200 V | DO-214AC (SMA) | 175 | Not For New Designs |
| EGF1D-E3/5CA | Vishay General Semiconductor - Diodes Division | 200 | 1 | 1000 @ 1 A | 50 | 5 @ 200 V | DO-214BA (GF1) | 175 | Active |
| EGF1D-E3/67A | Vishay General Semiconductor - Diodes Division | 200 | 1 | 1000 @ 1 A | 50 | 5 @ 200 V | DO-214BA (GF1) | 175 | Active |
| ES1D | EVVO Semi | 200 | 1 | 1000 @ 1 A | 35 | 5 @ 200 V | DO-214AC (SMA) | 150 | Active |
| ES1D-13-F | Diodes Incorporated | 200 | 1 | 920 @ 1 A | 25 | 5 @ 200 V | DO-214AC (SMA) | 150 | Active |
| ES1D-E3/5AT | Vishay General Semiconductor - Diodes Division | 200 | 1 | 920 @ 1 A | 25 | 5 @ 200 V | DO-214AC (SMA) | 150 | Active |
| ES1D-E3/61T | Vishay General Semiconductor - Diodes Division | 200 | 1 | 920 @ 1 A | 25 | 5 @ 200 V | DO-214AC (SMA) | 150 | Active |
Engineering Selection Recommendations
Primary Recommendation for Direct Replacement:
ES1D-E3/61T (Vishay General Semiconductor - Diodes Division) is the preferred direct substitute for STPR120A. This part maintains identical electrical specifications (200 V, 1 A, DO-214AC package), is in active production status, and carries ROHS3 compliance with MSL 1 rating. The forward voltage (920 mV @ 1 A) and reverse recovery time (25 ns) are superior to the original part, providing improved performance characteristics. Inventory availability is substantial (2,328,659 units), ensuring supply chain continuity.
Alternative Direct Equivalents:
ES1D-E3/5AT (Vishay General Semiconductor - Diodes Division) provides identical electrical performance to ES1D-E3/61T with equivalent specifications and active product status. ES1D-13-F (Diodes Incorporated) offers comparable performance with the lowest reverse recovery time (25 ns) among direct equivalents and high inventory availability (550,400 units).
Enhanced Performance Alternative:
STTH1R02A (STMicroelectronics) is suitable for applications requiring higher current capacity (1.5 A vs. 1 A) while maintaining 200 V reverse voltage rating. This part features improved thermal performance (175°C junction temperature vs. 150°C) and faster reverse recovery time (30 ns). Use this substitute when design margins or thermal considerations warrant the higher current rating.
Package Compatibility Note:
EGF1D-E3/5CA and EGF1D-E3/67A (Vishay General Semiconductor - Diodes Division) utilize DO-214BA (GF1) package instead of DO-214AC (SMA). These parts are electrically equivalent but require PCB layout modification due to different package footprint. Both are in active production with extended temperature range (-65°C to 175°C).
Parts to Avoid for New Designs:
EGF1D (onsemi) carries "Not For New Designs" status and exhibits higher reverse leakage current (10 µA @ 200 V) compared to the original specification (3 µA @ 200 V). CGRA4003-G (Comchip Technology) shows elevated forward voltage (1100 mV @ 1 A) relative to the original part.
Frequently Asked Questions (FAQ)
Q: Can STTH1R02A be used as a direct replacement for STPR120A?
A: STTH1R02A is electrically compatible with STPR120A for applications operating at or below 1 A. The higher current rating (1.5 A) and improved thermal characteristics (175°C vs. 150°C) provide design margin. The package (DO-214AC/SMA) is identical. No PCB modifications are required. This substitution is suitable when thermal performance or current headroom is beneficial.
Q: What is the difference between ES1D-E3/61T and ES1D-E3/5AT?
A: Both parts are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications (200 V, 1 A, 920 mV forward voltage, 25 ns reverse recovery time, DO-214AC package). The designations reflect different packaging configurations or tape specifications. Both are active products suitable for direct replacement of STPR120A.
Q: Why do EGF1D-E3/5CA and EGF1D-E3/67A use a different package (DO-214BA) than the original STPR120A (DO-214AC)?
A: DO-214BA (GF1) and DO-214AC (SMA) are distinct surface mount packages with different footprints and pin configurations. While electrically equivalent, substitution requires PCB layout modification. These parts are recommended only when PCB redesign is feasible or when the DO-214BA footprint is already present in the design.
Q: Is CGRA4003-G a suitable substitute?
A: CGRA4003-G (Comchip Technology) meets the core electrical requirements (200 V, 1 A, DO-214AC package) and is in active production. However, the forward voltage specification (1100 mV @ 1 A) exceeds the original part (940 mV @ 1 A), resulting in higher power dissipation. This substitution is acceptable only when thermal design margins accommodate the increased forward voltage drop.
Q: Should EGF1D be considered for new designs?
A: EGF1D (onsemi) carries "Not For New Designs" status and exhibits higher reverse leakage current (10 µA @ 200 V) compared to STPR120A (3 µA @ 200 V). This part is not recommended for new applications. Existing designs currently using EGF1D should transition to active alternatives such as ES1D-E3/61T or STTH1R02A.
Q: What are the key compliance considerations when selecting a substitute?
A: All recommended substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original STPR120A specifications. REACH status is unaffected for all listed alternatives. These certifications ensure compatibility with current manufacturing and environmental regulations.
Q: Can ES1D (EVVO Semi) be used as a substitute?
A: ES1D (EVVO Semi) meets electrical specifications (200 V, 1 A, DO-214AC package) and is in active production. However, the part number lacks specific revision designation (such as -E3/61T or -13-F), which may indicate a generic or unspecified variant. For supply chain traceability and consistency, ES1D-E3/61T or ES1D-13-F are preferred alternatives with clearly defined specifications.
Q: What is the significance of reverse recovery time (trr) in selecting a substitute?
A: Reverse recovery time affects switching speed and electromagnetic interference characteristics. STPR120A specifies 35 ns. Substitute parts with lower trr values (such as ES1D-E3/61T at 25 ns or ES1D-13-F at 25 ns) provide faster switching performance and reduced noise. Parts with higher trr values (such as EGF1D at 50 ns) are acceptable for applications not sensitive to switching speed but may increase EMI.
Q: Are there inventory considerations when selecting a substitute?
A: Inventory availability varies significantly among alternatives. ES1D-E3/61T offers the highest inventory (2,328,659 units), ensuring long-term supply security. STTH1R02A (1,634 units) and ES1D-E3/5AT (20,100 units) have more limited availability. For high-volume production, ES1D-E3/61T is the most reliable choice from a supply chain perspective.
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