STTH16BC065CT Equivalent & Substitute Parts

Part Overview

The STTH16BC065CT is a fast recovery diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode with a maximum reverse voltage of 650 V and average rectified current of 16 A per diode. The device is packaged in TO-220-3 through-hole format and is classified as obsolete. Due to its obsolete status, equivalent substitute parts are necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility with the TO-220-3 package and preserve critical electrical parameters within acceptable operating ranges.

Key Parameters

Parameter	STTH16BC065CT Value	Unit
Voltage - DC Reverse (Vr) (Max)	650	V
Current - Average Rectified (Io) (per Diode)	16	A
Voltage - Forward (Vf) (Max) @ If	3.2 @ 8	V @ A
Reverse Recovery Time (trr)	40	ns
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Diode Configuration	1 Pair Common Cathode	—
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the STTH16BC065CT is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Diode Configuration: 1 Pair Common Cathode (all substitutes must match)
Mounting Type: Through Hole (all substitutes must match)
Package / Case: TO-220-3 (all substitutes must match)
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io) (all substitutes must match)

Electrical Parameter Ranges for Substitution:

Voltage - DC Reverse (Vr) (Max): Substitute must equal or exceed 650 V
Current - Average Rectified (Io) (per Diode): Substitute must equal or exceed 16 A
Reverse Recovery Time (trr): Substitute must be ≤ 40 ns for equivalent performance

Substitute parts are grouped into two categories based on voltage rating alignment:

Category 1: 650 V Voltage Rating (Direct Voltage Match)

IDP30C65D2XKSA1 (Infineon Technologies, 15 A, 650 V)

Category 2: 600 V Voltage Rating (Reduced Voltage, Current-Dependent)

STTH16L06CT (STMicroelectronics, 10 A, 600 V)
DHG20C600PB (IXYS, 10 A, 600 V)
DSEC16-06A (IXYS, 10 A, 600 V)
DHG10C600PB (IXYS, 5 A, 600 V)
LXA12T600C (Power Integrations, 6 A, 600 V, Schottky Technology)
LXA08T600C (Power Integrations, 4 A, 600 V, Schottky Technology)
MURH860CTG (onsemi, 4 A, 600 V)

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [A]	Vf (Max) @ If [V @ A]	trr [ns]	Technology	Product Status
STTH16BC065CT	STMicroelectronics	650	16	3.2 @ 8	40	Standard	Obsolete
IDP30C65D2XKSA1	Infineon Technologies	650	15	2.2 @ 15	31	Standard	Active
STTH16L06CT	STMicroelectronics	600	10	1.8 @ 8	55	Standard	Active
DHG20C600PB	IXYS	600	10	2.37 @ 10	35	Standard	Active
DSEC16-06A	IXYS	600	10	2.1 @ 10	35	Standard	Active
DHG10C600PB	IXYS	600	5	2.2 @ 5	35	Standard	Active
LXA12T600C	Power Integrations	600	6	2.94 @ 6	23	Schottky	Active
LXA08T600C	Power Integrations	600	4	2.96 @ 4	18.5	Schottky	Active
MURH860CTG	onsemi	600	4	2.8 @ 4	35	Standard	Active

Engineering Selection Recommendations

Primary Recommendation: IDP30C65D2XKSA1

The IDP30C65D2XKSA1 (Infineon Technologies, Rapid 2 series) is the optimal substitute for the STTH16BC065CT. This part maintains the 650 V reverse voltage rating of the original device, operates at 15 A average rectified current (within 94% of the original 16 A specification), and delivers superior reverse recovery time performance at 31 ns (22% faster than the original 40 ns). The device is ROHS3 compliant, carries active product status, and is available in production quantities. Operating temperature range of −40°C to 175°C provides extended thermal performance.

Secondary Recommendations: 600 V Alternatives

For applications where 50 V voltage derating is acceptable, the following active parts provide viable substitution:

STTH16L06CT (STMicroelectronics): Maintains manufacturer continuity with the original STTH16 base product family. Rated at 10 A, this part is suitable for applications requiring ≤10 A per diode. ROHS3 compliant and active status.
DHG20C600PB (IXYS): Rated at 10 A with 35 ns reverse recovery time. Provides balanced performance across forward voltage and switching characteristics. ROHS3 compliant and active status.
DSEC16-06A (IXYS, HiPerFRED™ series): Rated at 10 A with 35 ns reverse recovery time and extended operating temperature range (−55°C to 175°C). ROHS3 compliant and active status.

Lower Current Alternatives:

Parts rated below 10 A (DHG10C600PB, LXA12T600C, LXA08T600C, MURH860CTG) are suitable only for applications where the circuit design accommodates reduced current capacity. These parts are not recommended as direct replacements for the full 16 A specification of the original device.

Compliance and Availability:

All recommended substitute parts are ROHS3 compliant, REACH unaffected, and classified as active products with confirmed inventory availability. All parts maintain the TO-220-3 through-hole package format and 1 Pair Common Cathode configuration of the original device.

Frequently Asked Questions (FAQ)

Q: Can the IDP30C65D2XKSA1 directly replace the STTH16BC065CT in all applications?

A: The IDP30C65D2XKSA1 is electrically compatible with the STTH16BC065CT for applications operating at ≤15 A per diode. The 650 V voltage rating matches the original specification. The 31 ns reverse recovery time is faster than the original 40 ns, which improves switching performance. Verify that your circuit design does not depend on the specific forward voltage characteristics of the original part at 8 A operation.

Q: Why do some substitute parts have 600 V ratings instead of 650 V?

A: The 600 V alternatives represent a 50 V voltage derating from the original 650 V specification. These parts are suitable for applications where the maximum operating voltage does not exceed 600 V. Circuit designs with voltage margins greater than 50 V can accommodate these substitutes. Applications requiring the full 650 V rating must use the IDP30C65D2XKSA1.

Q: Are Schottky technology parts (LXA12T600C, LXA08T600C) suitable substitutes?

A: Schottky diodes exhibit different forward voltage and reverse leakage characteristics compared to standard fast recovery diodes. The LXA12T600C and LXA08T600C are rated at 6 A and 4 A respectively, both below the 16 A specification of the original part. These parts are not recommended as direct replacements for full-current applications. Schottky substitutes are suitable only for reduced-current circuit designs where the lower forward voltage drop provides system-level benefits.

Q: What is the significance of reverse recovery time (trr) in selecting a substitute?

A: Reverse recovery time determines the switching speed of the diode. The original STTH16BC065CT specifies 40 ns. Substitute parts with equal or faster trr (lower values) provide equivalent or improved switching performance. Parts with slower trr (higher values) may introduce additional switching losses and heat generation. The IDP30C65D2XKSA1 at 31 ns and DHG20C600PB at 35 ns both meet or exceed the original performance specification.

Q: Is the TO-220-3 package format consistent across all substitute parts?

A: Yes. All substitute parts listed maintain the TO-220-3 through-hole package format. This ensures mechanical and thermal compatibility with existing PCB layouts and heatsink mounting arrangements. Verify that your PCB footprint and thermal management design accommodate the specific supplier device package variant (TO-220 vs. TO-220AB vs. PG-TO220-3), as these may have minor dimensional variations.

Q: What is the impact of forward voltage (Vf) differences between the original and substitute parts?

A: Forward voltage affects power dissipation and circuit efficiency. The original STTH16BC065CT specifies 3.2 V maximum at 8 A. Substitute parts exhibit varying forward voltages depending on technology and current rating. Lower forward voltages (such as DSEC16-06A at 2.1 V @ 10 A) reduce power dissipation. Higher forward voltages (such as LXA08T600C at 2.96 V @ 4 A) increase dissipation. Verify that your thermal design accommodates the forward voltage characteristics of the selected substitute.

Q: Can I use a lower-current-rated part if my application only requires partial current capacity?

A: Yes, provided the application current does not exceed the substitute part's rating. For example, if your circuit operates at 5 A per diode, the DHG10C600PB (5 A rating) is suitable. However, this approach reduces design margin and eliminates headroom for future current increases. Using a part rated closer to the original specification (such as the 15 A IDP30C65D2XKSA1) provides greater design flexibility and safety margin.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original STTH16BC065CT is also ROHS3 compliant. This ensures compatibility with environmental and regulatory requirements for lead-free manufacturing and hazardous substance restrictions.

Q: What is the difference between "Active" and "Obsolete" product status?

A: Active products are in current production with guaranteed availability and ongoing manufacturer support. Obsolete products are no longer manufactured and have limited remaining inventory. The STTH16BC065CT is obsolete, which necessitates substitution. All recommended substitute parts carry active status, ensuring long-term availability and supply chain reliability.

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