MSB710-RT1 PNP Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The MSB710-RT1 is a PNP bipolar junction transistor manufactured by onsemi, rated for 50V collector-emitter breakdown voltage and 500mA maximum collector current in a surface mount SC-59 package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. The part operates at a maximum junction temperature of 150°C with 200mW power dissipation capability and is RoHS non-compliant.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Max)	500	mA
Collector-Emitter Breakdown Voltage (Max)	50	V
Power Dissipation (Max)	200	mW
DC Current Gain (hFE Min)	120 @ 150mA, 10V	—
Vce Saturation (Max)	600mV @ 30mA, 300mA	—
Collector Cutoff Current (Max)	100	nA
Operating Temperature (Max)	150	°C
Package Type	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the MSB710-RT1 is determined by strict electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be PNP
Collector current rating must be ≥500mA
Collector-emitter breakdown voltage must be ≥50V
DC current gain (hFE) must be ≥120 at specified test conditions
Vce saturation characteristics must be compatible with circuit requirements
Collector cutoff current must not exceed 100nA
Maximum junction temperature must be ≥150°C

Mechanical Compatibility Criteria:

Package must be TO-236-3, SC-59, or SOT-23-3 (surface mount)
Pinout must be identical (Collector, Base, Emitter)
Moisture sensitivity level must be ≤1 (Unlimited)

Substitution Categories:

Direct Equivalent (Upgrade): 2SA1313-Y,LF meets or exceeds all electrical parameters while maintaining identical package compatibility and active product status with RoHS3 compliance.

Direct Substitute (Active): 2PB710ARL,215 and 2PB710ARL,235 provide electrical equivalence with automotive-grade qualification (AEC-Q101) and improved power dissipation (250mW vs 200mW).

Compatible Substitute (Reduced Voltage Rating): BCX17T116 and BCX17,215 operate at 45V breakdown voltage (5V lower than MSB710-RT1) with identical 500mA current rating and compatible package. These are suitable for applications not requiring the full 50V rating.

Compatible Substitute (Reduced Power): BC807K-40VL operates at 45V with 250mW power dissipation and automotive qualification but exhibits higher Vce saturation (700mV vs 600mV).

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(BR) V	Power mW	hFE Min	Vce Sat mV	Freq MHz	Package	Status	RoHS
MSB710-RT1	onsemi	500	50	200	120	600	—	SC-59	Obsolete	Non-compliant
2SA1313-Y,LF	Toshiba	500	50	200	120	250	200	S-Mini	Active	ROHS3
2PB710ARL,215	Nexperia	500	50	250	120	600	120	TO-236AB	Active	ROHS3
2PB710ARL,235	Nexperia	500	50	250	120	600	120	TO-236AB	Active	ROHS3
2PB710ASL,215	Nexperia	500	50	250	170	600	140	TO-236AB	Active	ROHS3
2PB710ASL,235	Nexperia	500	50	250	170	600	140	TO-236AB	Active	ROHS3
BCX17T116	Rohm	500	45	425	100	620	200	SST3	Active	ROHS3
BCX17,215	Nexperia	500	45	250	100	620	80	TO-236AB	Active	ROHS3
BCX17,235	NXP	500	45	250	100	620	80	SOT-23	Active	—
BC807K-40VL	Nexperia	500	45	250	250	700	80	TO-236AB	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation: 2SA1313-Y,LF (Toshiba)

This part provides full electrical equivalence to the MSB710-RT1 with identical 50V breakdown voltage and 200mW power rating. The 2SA1313-Y,LF offers superior Vce saturation performance (250mV vs 600mV) and active product status with RoHS3 compliance. Transition frequency of 200MHz supports higher-speed applications. Suitable for direct replacement in new designs requiring the full 50V rating.

Secondary Recommendation: 2PB710ASL,235 (Nexperia)

This automotive-grade part (AEC-Q101 qualified) maintains 50V breakdown voltage with enhanced DC current gain (170 vs 120) and 140MHz transition frequency. The 250mW power dissipation provides thermal margin. RoHS3 compliance and high inventory availability (10,643 pcs) support production continuity. Recommended for automotive and industrial applications.

Alternative for Reduced Voltage Applications: BCX17,235 (NXP)

Where circuit design permits operation at 45V breakdown voltage, the BCX17,235 offers the highest inventory availability (134,745 pcs) and bulk packaging options. Maintains 500mA current rating with 250mW power dissipation. Suitable for cost-optimized designs not requiring the full 50V rating.

Thermal Performance Consideration: BCX17T116 (Rohm)

For applications requiring maximum power dissipation capability, the BCX17T116 provides 425mW rating with 200MHz transition frequency. The 45V breakdown voltage limitation applies; use only in circuits designed for this voltage class.

Frequently Asked Questions (FAQ)

Q: Can I use BCX17,235 as a direct replacement for MSB710-RT1?

A: BCX17,235 is electrically compatible for applications not requiring the full 50V collector-emitter breakdown voltage. The part maintains 500mA current rating, 250mW power dissipation, and identical SOT-23 package pinout. Circuit analysis must confirm that maximum operating voltage does not exceed 45V. If your circuit operates above 45V, use 2SA1313-Y,LF or 2PB710ASL,235 instead.

Q: What is the difference between 2PB710ARL,235 and 2PB710ASL,235?

A: Both parts maintain identical electrical ratings (50V, 500mA, 250mW) and package compatibility. The primary difference is DC current gain: 2PB710ARL,235 has hFE minimum of 120, while 2PB710ASL,235 has hFE minimum of 170. Additionally, 2PB710ASL,235 provides 140MHz transition frequency versus 120MHz for the ARL variant. Select 2PB710ASL,235 for applications requiring higher current gain or faster switching performance.

Q: Is the MSB710-RT1 package identical to the 2SA1313-Y,LF package?

A: Both parts use TO-236-3 package family (SC-59 and S-Mini are equivalent designations). Pinout is identical: Collector, Base, Emitter. Physical dimensions are compatible for PCB footprints designed for SOT-23-3 or SC-59 packages. Verify with component datasheets for specific land pattern requirements.

Q: Why is the MSB710-RT1 obsolete?

A: The MSB710-RT1 is classified as obsolete by onsemi. Active equivalent parts from Toshiba, Nexperia, NXP, and Rohm provide superior performance characteristics, RoHS3 compliance, and guaranteed long-term availability. New designs should specify active alternatives to ensure supply chain continuity.

Q: Can I use BC807K-40VL in a high-current switching application?

A: BC807K-40VL is rated for 500mA maximum collector current, matching the MSB710-RT1. However, the Vce saturation is higher (700mV vs 600mV), resulting in increased power dissipation during saturation. For applications requiring low saturation voltage, select 2SA1313-Y,LF (250mV) or 2PB710ASL,235 (600mV). BC807K-40VL is suitable for linear amplification or applications where saturation voltage is not critical.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry standard qualification for discrete semiconductors. Parts bearing this qualification (2PB710ARL,215, 2PB710ARL,235, 2PB710ASL,215, 2PB710ASL,235, BCX17,215, BCX17,235, BC807K-40VL) have undergone rigorous testing for reliability, temperature cycling, and performance consistency. These parts are suitable for automotive and mission-critical applications requiring documented quality assurance.

Q: What is the significance of RoHS3 compliance?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All recommended active substitutes except BCX17,235 carry explicit RoHS3 compliance. For applications subject to environmental regulations or customer requirements, specify RoHS3-compliant parts.

Q: Can I mix different substitute parts in the same circuit board?

A: Yes, provided all selected parts meet the circuit's electrical requirements. However, for production consistency and supply chain management, standardize on a single part number. If multiple part numbers are necessary, ensure they are qualified equivalents with identical electrical characteristics at the specified test conditions.

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