2SA1294 Equivalent & Substitute Bipolar (BJT) Transistors Reference

Part Overview

The Sanken Electric USA Inc. 2SA1294 is a PNP bipolar junction transistor (BJT) designed for high-power applications requiring a collector-emitter voltage of up to 230 V, a collector current up to 15 A, and power dissipation up to 130 W. It features a high DC current gain (hFE) and a robust TO-3P package suited for through-hole mounting. The 2SA1294 is currently an active product, but sourcing substitute parts can be essential to address supply chain risks, inventory management, end-of-life scenarios, or specific compliance requirements.

Key Parameters

Parameter	Value
Transistor Type	PNP
Current - Collector (Ic) (Max)	15 A
Voltage - Collector Emitter Breakdown (Max)	230 V
Vce Saturation (Max) @ Ib, Ic	2V @ 500mA, 5A
Current - Collector Cutoff (Max)	100µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	50 @ 5A, 4V
Power - Max	130 W
Frequency - Transition	35MHz
Operating Temperature	150°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-3P-3, SC-65-3
Supplier Device Package	TO-3P
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 2SA1294 are identified based strictly on the following key parameters: transistor type, maximum collector current (Ic), maximum collector-emitter voltage, Vce(sat) at specified current, maximum collector cutoff current, minimum DC current gain (hFE), maximum power dissipation, transition frequency, operating temperature, mounting type, package/case compatibility, and RoHS compliance. Only parts matching or exceeding these fundamental electrical ratings and mechanical dimensions are considered for substitution within the “Transistors, Bipolar (BJT)” category.

Parameter Comparison

Parameter	2SA1294	2SA1962OTU	NJW21194G
Transistor Type	PNP	PNP	NPN
Current - Collector (Ic) (Max)	15 A	17 A	16 A
Voltage - Collector Emitter Breakdown (Max)	230 V	250 V	250 V
Vce Saturation (Max) @ Ib, Ic	2V @ 500mA, 5A	3V @ 800mA, 8A	4V @ 3.2A, 16A
Current - Collector Cutoff (Max)	100µA (ICBO)	5µA (ICBO)	100µA
DC Current Gain (hFE) (Min) @ Ic, Vce	50 @ 5A, 4V	80 @ 1A, 5V	20 @ 8A, 5V
Power - Max	130 W	130 W	200 W
Frequency - Transition	35MHz	30MHz	4MHz
Operating Temperature	150°C (TJ)	-55°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-3P-3, SC-65-3	TO-3P-3, SC-65-3	TO-3P-3, SC-65-3
Supplier Device Package	TO-3P	TO-3P	TO-3P-3L
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both 2SA1294 and 2SA1962OTU are PNP transistors in the TO-3P family and share ROHS3 compliance. The 2SA1294 is active while the 2SA1962OTU is obsolete; consider this status when selecting for long-term projects. The NJW21194G differs in transistor type (NPN vs. PNP) and electrical parameters but matches in compliance and package/case. Moisture Sensitivity Level is 1 (Unlimited) for the 2SA1294 and Not Applicable for the substitutes, which is suitable for through-hole components.

Frequently Asked Questions (FAQ)

Q1: What are the main criteria for selecting a substitute for the 2SA1294?

A1: Key criteria include matching transistor type, maximum collector current, collector-emitter voltage, DC current gain, power rating, package/case (TO-3P-3, SC-65-3), and RoHS compliance.

Q2: Is mechanical compatibility maintained with 2SA1962OTU and NJW21194G?

A2: Both substitutes share the TO-3P-3, SC-65-3 package classification, supporting mechanical and mounting compatibility.

Q3: Are there RoHS or environmental compliance differences?

A3: All listed devices, including 2SA1294 and substitutes, are ROHS3 Compliant.

Q4: Does transistor polarity matter for substitution?

A4: Transistor type (PNP vs. NPN) is a key parameter; substitutes with a different polarity may not function equivalently in an application designed for the original type.

Q5: Is there any difference in Moisture Sensitivity Level between the parts?

A5: 2SA1294 has MSL 1 (Unlimited). Substitutes are listed as “Not Applicable,” which is standard for through-hole devices in this category.

Q6: Why is product status relevant for selection?

A6: Product status (active or obsolete) informs supply chain planning and future availability; only choose obsolete parts if continued supply or stock is confirmed.

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