MPSA13RLRAG Equivalent & Substitute Parts

Part Overview

The MPSA13RLRAG is an NPN Darlington bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features a 30 V collector-emitter breakdown voltage, 500 mA maximum collector current, and 625 mW power dissipation capability in a through-hole TO-92 package. The MPSA13RLRAG is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity.

Substiute Parts

MPSA13RLRAG

onsemiIn Stock: 6441MPSA13RLRAG Datasheet

Current PartRFQ

KSP13TA

onsemiIn Stock: 1968KSP13TA Datasheet

DirectRFQ

MMBTA13LT1G

onsemiIn Stock: 152300MMBTA13LT1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MPSA13RLRAG are identified based on electrical and mechanical compatibility within the NPN Darlington transistor category. The substitution logic is structured as follows:

Direct Substitutes maintain identical or equivalent electrical specifications and mounting technology:

• Collector current rating: 500 mA (maximum)
• Collector-emitter breakdown voltage: 30 V
• DC current gain (hFE): 10000 minimum at specified conditions
• Saturation voltage: 1.5 V maximum at specified bias conditions
• Transition frequency: 125 MHz
• Through-hole mounting configuration

Similar Substitutes provide functional equivalence with reduced current-handling capability or alternative mounting technology:

• Collector current rating: 300 mA or greater (reduced from 500 mA)
• Collector-emitter breakdown voltage: 30 V
• DC current gain (hFE): 10000 minimum at specified conditions
• Saturation voltage: 1.5 V maximum at specified bias conditions
• Transition frequency: 125 MHz
• Surface-mount or through-hole mounting

Parameter Comparison

Engineering Selection Recommendations

KSP13TA is the primary direct substitute for MPSA13RLRAG applications. This part maintains identical electrical specifications, including 500 mA collector current, 30 V breakdown voltage, and 625 mW power dissipation. Both devices utilize through-hole TO-92-3 packaging, ensuring mechanical and thermal compatibility in existing PCB layouts. The KSP13TA is classified as active product status with ROHS3 compliance, providing long-term availability and regulatory alignment for new designs and production continuity.

MMBTA13LT1G serves as a functional alternative where design constraints permit surface-mount technology and reduced current handling. This part maintains the 30 V breakdown voltage, 125 MHz transition frequency, and 10000 minimum DC current gain. The maximum collector current is reduced to 300 mA, and power dissipation is limited to 225 mW. The SOT-23-3 surface-mount package requires PCB redesign but offers space efficiency and improved thermal characteristics in high-density applications. MMBTA13LT1G is active product status with ROHS3 compliance and full temperature range operation (-55 to 150°C).

Selection between direct and similar substitutes depends on application current requirements, PCB form factor constraints, and thermal management considerations. Direct substitution with KSP13TA is recommended for designs requiring full 500 mA capability and through-hole mounting. MMBTA13LT1G substitution is appropriate for applications with maximum collector current requirements of 300 mA or less and where surface-mount technology is acceptable.

Frequently Asked Questions (FAQ)

Q: Can KSP13TA directly replace MPSA13RLRAG in existing designs?

A: Yes. KSP13TA provides direct electrical and mechanical compatibility. Both devices feature identical collector current (500 mA), breakdown voltage (30 V), saturation voltage (1.5 V), DC current gain (10000), and transition frequency (125 MHz) specifications. The TO-92-3 through-hole package is mechanically equivalent, permitting direct PCB substitution without circuit modification.

Q: What are the limitations of MMBTA13LT1G as a substitute?

A: MMBTA13LT1G differs in two critical aspects: maximum collector current is reduced to 300 mA (versus 500 mA), and maximum power dissipation is 225 mW (versus 625 mW). Additionally, MMBTA13LT1G uses SOT-23-3 surface-mount packaging, requiring PCB redesign. This part is suitable only for applications with collector current requirements not exceeding 300 mA and where surface-mount technology is feasible.

Q: Are there temperature range differences between substitute parts?

A: KSP13TA specifies maximum operating temperature of 150°C without stated minimum, while MPSA13RLRAG and MMBTA13LT1G both specify -55 to 150°C operating range. For applications requiring full temperature range operation below -55°C, MMBTA13LT1G provides explicit low-temperature specification. KSP13TA low-temperature capability should be verified with the manufacturer for critical applications.

Q: What compliance certifications apply to substitute parts?

A: KSP13TA and MMBTA13LT1G are both ROHS3 compliant and REACH unaffected. Both parts carry EAR99 export classification and identical HTSUS commodity codes (8541.21.0075). Moisture sensitivity level (MSL) is 1 (unlimited) for MMBTA13LT1G and not applicable for KSP13TA, indicating no special moisture handling requirements for either part.

Q: Can MMBTA13LT1G be used in high-current applications originally designed for MPSA13RLRAG?

A: No. MMBTA13LT1G maximum collector current is 300 mA, making it unsuitable for applications requiring the full 500 mA capability of MPSA13RLRAG. Circuit redesign or current limiting is required if MMBTA13LT1G is selected. For applications requiring 500 mA operation, KSP13TA is the appropriate substitute.

Q: What is the inventory status of substitute parts?

A: KSP13TA has 1873 pieces in stock (active product). MMBTA13LT1G has 152200 pieces in stock (active product). Both parts are actively manufactured and available for procurement, providing supply continuity for MPSA13RLRAG replacement applications.