NJM431L2 Equivalent & Substitute Parts

Part Overview

The NJM431L2 is a shunt voltage reference IC manufactured by Nisshinbo Micro Devices Inc., classified as a Power Management (PMIC) component. This adjustable shunt voltage reference operates with a fixed output of 2.495V, maximum output voltage of 36V, and supports output current up to 100 mA with a tolerance of ±2.2%. The device is packaged in TO-92-3 (TO-226-3) through-hole configuration and operates across the temperature range of -40°C to 85°C.

The NJM431L2 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for applications utilizing this reference voltage IC.

Substiute Parts

NJM431L2

Nisshinbo Micro Devices Inc.In Stock: 2306NJM431L2 Datasheet

Current PartRFQ

TL431ACLPR

Texas InstrumentsIn Stock: 125237TL431ACLPR Datasheet

SimilarRFQ

TL431CLP

onsemiIn Stock: 889103TL431CLP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NJM431L2 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Reference Type: Shunt (all substitutes must be shunt-type references)
• Output Type: Adjustable (output voltage must be adjustable)
• Voltage - Output (Min/Fixed): 2.495V (fixed output voltage point)
• Voltage - Output (Max): 36V (maximum output voltage rating)
• Current - Output: 100 mA (output current capability)
• Package / Case: TO-92-3 or TO-226-3 (physical form factor and pin configuration)
• Mounting Type: Through Hole (PCB assembly method)

Tolerance Consideration: The NJM431L2 specifies ±2.2% tolerance. Substitute parts with equal or tighter tolerance (lower percentage value) are electrically compatible. Parts with looser tolerance do not meet the specification.

Temperature Range: The NJM431L2 operates from -40°C to 85°C. Substitute parts must support at minimum the application's required operating temperature range.

Two substitute parts meet these criteria: TL431ACLPR (Texas Instruments) and TL431CLP (onsemi).

Parameter Comparison

Engineering Selection Recommendations

TL431ACLPR (Texas Instruments) - Preferred Substitute

The TL431ACLPR is the recommended substitute for the NJM431L2. This part is currently in active product status, ensuring long-term availability and continued manufacturer support. The TL431ACLPR meets all critical electrical parameters: identical output voltage (2.495V to 36V), matching output current (100 mA), and compatible TO-92-3 package configuration.

The TL431ACLPR offers superior tolerance specification (±1% versus ±2.2%), providing tighter voltage regulation accuracy. The lower cathode current (600 µA versus 1 mA) reduces power consumption in the reference circuit.

The operating temperature range of 0°C to 70°C is narrower than the NJM431L2 (-40°C to 85°C). Applications requiring operation below 0°C or above 70°C must verify compatibility with the specific design requirements.

TL431CLP (onsemi) - Alternative Substitute

The TL431CLP provides an alternative substitute with identical electrical specifications to the NJM431L2: ±2.2% tolerance, 1 mA cathode current, and 100 mA output current capability. The TO-92-3 package and through-hole mounting are directly compatible.

The TL431CLP is listed as obsolete, similar to the NJM431L2. While currently in stock with substantial inventory (889,088 pieces), long-term availability cannot be assured. This part is suitable for immediate replacement needs but does not provide the supply chain security of an active product.

The operating temperature range (0°C to 70°C) is narrower than the NJM431L2 specification.

Frequently Asked Questions (FAQ)

Q: Can the TL431ACLPR directly replace the NJM431L2 without circuit modifications?

A: The TL431ACLPR is electrically and mechanically compatible with the NJM431L2 for applications operating within 0°C to 70°C. The three-pin TO-92-3 package pinout is identical. The superior tolerance (±1%) and lower cathode current are beneficial characteristics. Applications requiring operation outside the 0°C to 70°C range require design review.

Q: What is the difference between the TL431ACLPR and TL431CLP?

A: Both parts share identical electrical specifications (2.495V output, 36V maximum, 100 mA output current, ±2.2% tolerance for TL431CLP and ±1% for TL431ACLPR). The primary differences are manufacturer (Texas Instruments versus onsemi), product status (active versus obsolete), and cathode current (600 µA versus 1 mA). The TL431ACLPR is preferred due to active product status.

Q: Does the lower cathode current of the TL431ACLPR affect circuit operation?

A: The cathode current specification (600 µA for TL431ACLPR versus 1 mA for NJM431L2) indicates the minimum current required to maintain regulation. The lower value in the TL431ACLPR reduces power dissipation in the reference circuit. Existing circuit designs will operate correctly with this lower requirement.

Q: Are there temperature range limitations when substituting the NJM431L2?

A: Yes. The NJM431L2 operates from -40°C to 85°C, while both substitute parts (TL431ACLPR and TL431CLP) operate from 0°C to 70°C. Applications requiring operation below 0°C or above 70°C must verify alternative solutions or confirm that the narrower range is acceptable for the specific application environment.

Q: Is the TO-92-3 package identical across all three parts?

A: Yes. The NJM431L2, TL431ACLPR, and TL431CLP all use the TO-92-3 (TO-226-3) through-hole package with identical three-pin configuration. Direct PCB mounting compatibility is confirmed.

Q: What is the significance of the ±1% tolerance in the TL431ACLPR compared to ±2.2%?

A: The ±1% tolerance specification indicates tighter voltage regulation accuracy. The TL431ACLPR maintains the 2.495V output voltage within ±1% of the nominal value, compared to ±2.2% for the NJM431L2 and TL431CLP. This provides improved voltage reference stability for precision applications.