STTH212RL Equivalent & Substitute Parts

Part Overview

The STTH212RL is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 1200 V DC reverse voltage and 2 A average rectified current in a DO-201AD axial through-hole package. This component is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. The STTH212RL features fast recovery characteristics with a reverse recovery time of 75 ns, suitable for standard rectification applications requiring high voltage tolerance.

Substiute Parts

STTH212RL

STMicroelectronicsIn Stock: 1099STTH212RL Datasheet

Current PartRFQ

STTH310

STMicroelectronicsIn Stock: 4634STTH310 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STTH212RL is determined by the following critical electrical and mechanical parameters:

Mandatory Compatibility Criteria:

• Package / Case: DO-201AD, Axial (identical mechanical form factor required for through-hole PCB mounting)
• Mounting Type: Through Hole (no alternative mounting types applicable)
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (functional performance class)
• RoHS Status: ROHS3 Compliant (regulatory requirement)

Electrical Parameter Constraints:

• Voltage - DC Reverse (Vr) (Max): Substitute must equal or exceed 1200 V
• Current - Average Rectified (Io): Substitute must equal or exceed 2 A
• Reverse Recovery Time (trr): Substitute must maintain ≤ 75 ns for fast recovery classification
• Forward Voltage (Vf): Substitute must not exceed 1.75 V @ rated current

The STTH310 qualifies as a substitute despite lower maximum reverse voltage (1000 V versus 1200 V) because it maintains identical package geometry, fast recovery speed classification, and exceeds current rating requirements (3 A versus 2 A). The STTH310 is active product status, ensuring ongoing availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

STTH212RL (Main Part): The STTH212RL is obsolete and no longer in active production. While 1027 pieces remain in stock, this component should not be selected for new designs or long-term production commitments due to end-of-life status and supply uncertainty.

STTH310 (Substitute): The STTH310 is the designated substitute for the STTH212RL. This component is active product status with 4618 pieces in current inventory, ensuring supply chain continuity. Both components are ROHS3 compliant and REACH unaffected, meeting regulatory requirements. The STTH310 provides superior current rating (3 A versus 2 A) and equivalent reverse recovery time (75 ns). The primary design consideration is the reduced maximum reverse voltage rating (1000 V versus 1200 V); substitution is valid only for applications where the circuit design operates at or below 1000 V DC reverse voltage. The STTH310 features an extended operating temperature range (-40°C to 175°C) compared to the STTH212RL (175°C maximum), providing additional thermal margin in cold-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can the STTH310 directly replace the STTH212RL in existing designs?

A: Direct replacement is valid only if the circuit design operates at or below 1000 V DC reverse voltage. The STTH310 is rated for 1000 V maximum reverse voltage, compared to the STTH212RL's 1200 V rating. If the application requires 1200 V reverse voltage capability, the STTH310 is not suitable. Both components share identical DO-201AD axial through-hole package geometry and mounting requirements, enabling mechanical interchangeability without PCB modification.

Q: What are the key electrical differences between these parts?

A: The STTH310 provides higher average rectified current (3 A versus 2 A) and lower forward voltage drop (1.7 V @ 3 A versus 1.75 V @ 2 A). Both maintain identical fast recovery characteristics with 75 ns reverse recovery time. The STTH310 operates at reduced maximum reverse voltage (1000 V versus 1200 V). Reverse leakage current is equivalent at their respective voltage ratings (10 µA).

Q: Why is the STTH310 recommended despite lower voltage rating?

A: The STTH310 is active product status with robust supply availability, whereas the STTH212RL is obsolete. For applications designed to operate within 1000 V reverse voltage limits, the STTH310 provides superior current capacity and forward voltage characteristics. The substitute ensures long-term design support and production continuity.

Q: Are there packaging or mounting differences between these diodes?

A: Both the STTH212RL and STTH310 use identical DO-201AD axial through-hole packaging. No PCB layout modifications, lead bending adjustments, or mounting procedure changes are required for substitution. The STTH310 is supplied in cut tape packaging, whereas the STTH212RL inventory status does not specify packaging format.

Q: What compliance certifications apply to both components?

A: Both the STTH212RL and STTH310 are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (unlimited) for both components, indicating no special moisture control requirements during storage or handling. Both are classified under ECCN EAR99 and HTSUS 8541.10.0080.