J111RLRPG N-Channel JFET Equivalent & Substitute Parts

Part Overview

The J111RLRPG is an N-Channel JFET transistor manufactured by onsemi, rated for 35 V breakdown voltage with 350 mW power dissipation in a TO-92 through-hole package. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The J111 series provides direct functional equivalents with improved specifications and active product status.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Voltage - Breakdown (V(BR)GSS)	35	V
Current - Drain (Idss) @ Vds (Vgs=0)	20 mA @ 15 V	—
Voltage - Cutoff (VGS off) @ Id	3 V @ 1 µA	—
Resistance - RDS(On)	30	Ohms
Power - Max	350	mW
Operating Temperature Range	-65°C ~ 150°C	TJ
Mounting Type	Through Hole	—
Package / Case	TO-226-3, TO-92-3	—

Substitute Part Grouping Explanation

Substitution of the J111RLRPG is based on electrical parameter equivalence and mechanical compatibility. All substitute parts maintain identical electrical characteristics: 35 V breakdown voltage, 20 mA drain current at 15 V, 3 V cutoff voltage, and 30 Ohms on-resistance. All substitutes use the same TO-92-3 through-hole package, ensuring direct pin-compatible replacement.

The substitute parts (J111, J111-D26Z, J111-D74Z) differ from the main part in the following allowed parameters:

Power dissipation rating increased from 350 mW to 625 mW
Operating temperature range expanded from -65°C ~ 150°C to -55°C ~ 150°C
Product status changed from obsolete to active
Packaging format varies (bulk, cut tape)
RoHS compliance status updated to ROHS3 Compliant

These differences represent improvements and do not restrict substitution in applications designed for the J111RLRPG.

Parameter Comparison

Parameter	J111RLRPG	J111	J111-D26Z	J111-D74Z
Manufacturer	onsemi	onsemi	onsemi	onsemi
FET Type	N-Channel	N-Channel	N-Channel	N-Channel
Voltage - Breakdown (V(BR)GSS)	35 V	35 V	35 V	35 V
Current - Drain (Idss) @ Vds (Vgs=0)	20 mA @ 15 V	20 mA @ 15 V	20 mA @ 15 V	20 mA @ 15 V
Voltage - Cutoff (VGS off) @ Id	3 V @ 1 µA	3 V @ 1 µA	3 V @ 1 µA	3 V @ 1 µA
Resistance - RDS(On)	30 Ohms	30 Ohms	30 Ohms	30 Ohms
Power - Max	350 mW	625 mW	625 mW	625 mW
Operating Temperature Range	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three substitute parts (J111, J111-D26Z, J111-D74Z) are electrically and mechanically equivalent to the J111RLRPG and provide direct replacement capability. Selection among substitutes should be based on packaging and availability requirements:

J111: Bulk packaging format, highest inventory availability (95,300 pcs)
J111-D26Z: Cut tape packaging, 43,529 pcs in stock
J111-D74Z: Cut tape packaging, 59,715 pcs in stock

All substitute parts carry active product status and ROHS3 compliance, providing long-term supply assurance compared to the obsolete J111RLRPG. The increased power rating (625 mW vs. 350 mW) and expanded operating temperature range (-55°C to 150°C vs. -65°C to 150°C) represent specification improvements that do not affect backward compatibility.

Frequently Asked Questions (FAQ)

Q: Can J111, J111-D26Z, and J111-D74Z be used interchangeably with J111RLRPG?

A: Yes. All three parts share identical electrical parameters (35 V breakdown, 20 mA drain current, 3 V cutoff voltage, 30 Ohms on-resistance) and use the same TO-92-3 through-hole package. Pin configuration and functional behavior are identical.

Q: What is the difference between J111, J111-D26Z, and J111-D74Z?

A: The three parts are electrically identical. Differences exist only in packaging format (bulk vs. cut tape) and inventory availability. J111-D26Z and J111-D74Z are tape-and-reel formats suitable for automated assembly, while J111 is supplied in bulk.

Q: Why does the J111RLRPG have a lower power rating (350 mW) than the substitutes (625 mW)?

A: The J111RLRPG is an obsolete part. The substitute parts represent the current production versions with improved thermal specifications. The higher power rating does not affect applications designed for the original 350 mW specification.

Q: Are there any temperature range limitations when substituting?

A: The J111RLRPG operates from -65°C to 150°C, while substitutes operate from -55°C to 150°C. Applications requiring operation below -55°C cannot use the substitute parts. For applications within the -55°C to 150°C range, substitutes are fully compatible.

Q: What packaging should I select for my application?

A: For manual assembly or prototyping, bulk packaging (J111) is suitable. For automated pick-and-place assembly, cut tape formats (J111-D26Z or J111-D74Z) are recommended. Electrical performance is identical across all packaging options.

Q: Are the substitute parts RoHS compliant?

A: Yes. All substitute parts (J111, J111-D26Z, J111-D74Z) are ROHS3 compliant. The J111RLRPG RoHS status was not specified in the original documentation.

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