RN732BTTD1433B25 Equivalent & Substitute Parts

Part Overview

The RN732BTTD1433B25 is a 143 kOhms ±0.1% 0.125W (1/8W) Chip Resistor in 1206 (3216 Metric) package manufactured by KOA Speer Electronics, Inc. This thin film, moisture-resistant component operates across -55°C to 155°C with a temperature coefficient of ±25ppm/°C. The part is currently obsolete, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility while offering active product status and improved availability.

Key Parameters

Parameter	Value
Resistance	143 kOhms
Tolerance	±0.1%
Power Rating	0.125W (1/8W)
Package / Case	1206 (3216 Metric)
Composition	Thin Film
Temperature Coefficient	±25ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RN732BTTD1433B25 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Resistance value: 143 kOhms
Tolerance: ±0.1%
Package: 1206 (3216 Metric)
Composition: Thin Film
Temperature Coefficient: ±25ppm/°C
Operating Temperature Range: -55°C ~ 155°C minimum
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

Power rating may be equal to or greater than 0.125W (1/8W)
Dimensional tolerances within supplier specifications for 1206 package
Additional features (automotive qualification, anti-sulfur properties) do not disqualify substitution
RoHS compliance status may differ based on application requirements

Substitute parts are grouped into two categories: Direct Equivalents (matching 0.125W power rating) and Upgrades (higher power ratings with enhanced features).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Temp Range (°C)	Product Status	RoHS
RN732BTTD1433B25	KOA Speer	143k	±0.1%	0.125	±25	-55 ~ 155	Obsolete	ROHS3
RN73R2BTTD1433B25	KOA Speer	143k	±0.1%	0.25	±25	-55 ~ 155	Active	ROHS3
CPF1206B143KE1	TE Connectivity	143k	±0.1%	0.125	±25	-55 ~ 155	Active	ROHS3
RNCF1206BTE143K	Stackpole Electronics	143k	±0.1%	0.333	±25	-55 ~ 155	Active	ROHS3
TNPW1206143KBETY	Vishay Dale	143k	±0.1%	0.25	±25	-55 ~ 125	Active	Non-compliant
AT1206BRD07143KL	YAGEO	143k	±0.1%	0.25	±25	-55 ~ 155	Active	ROHS3
ERA-8AEB1433V	Panasonic	143k	±0.1%	0.25	±25	-55 ~ 155	Active	ROHS3
PTN1206E1433BST1	Vishay Dale	143k	±0.1%	0.4	±25	-55 ~ 155	Active	ROHS3
RG3216N-1433-B-T5	Susumu	143k	±0.1%	0.25	±10	-55 ~ 155	Active	ROHS3
RG3216N-1433-W-T1	Susumu	143k	±0.05%	0.25	±10	-55 ~ 155	Active	ROHS3
RG3216P-1433-B-T1	Susumu	143k	±0.1%	0.25	±25	-55 ~ 155	Active	ROHS3

Engineering Selection Recommendations

Direct Equivalent (Matching Power Rating):

CPF1206B143KE1 (TE Connectivity) is the primary direct equivalent. It matches the 0.125W power rating, ±0.1% tolerance, and operating temperature range of the original part. The component is active, ROHS3 compliant, and maintains identical electrical specifications. Inventory availability is 761 pieces.

Preferred Substitutes (Higher Power Rating with Active Status):

For applications where higher power dissipation capability is acceptable, the following active components provide enhanced reliability and availability:

RN73R2BTTD1433B25 (KOA Speer): Same manufacturer as original part, 0.25W rating, automotive AEC-Q200 qualified, 3961 pieces in stock
ERA-8AEB1433V (Panasonic): 0.25W rating, automotive AEC-Q200 qualified, highest inventory (7433 pieces), ROHS3 compliant
AT1206BRD07143KL (YAGEO): 0.25W rating, automotive AEC-Q200 qualified, anti-sulfur and moisture-resistant features, 980 pieces in stock
RG3216P-1433-B-T1 (Susumu): 0.25W rating, automotive AEC-Q200 qualified, anti-sulfur features, 798 pieces in stock

Enhanced Performance Options:

RG3216N-1433-W-T1 (Susumu): Tighter tolerance (±0.05%), improved temperature coefficient (±10ppm/°C), automotive AEC-Q200 qualified
PTN1206E1433BST1 (Vishay Dale): Highest power rating (0.4W), anti-sulfur and non-inductive properties, moisture-resistant

Compliance Consideration:

TNPW1206143KBETY (Vishay Dale) is not RoHS3 compliant and has a reduced operating temperature maximum of 125°C. This part is suitable only for applications where RoHS non-compliance and lower temperature ceiling are acceptable.

Frequently Asked Questions (FAQ)

Q: Can I use a higher power-rated resistor as a substitute for the RN732BTTD1433B25?

A: Yes. The RN732BTTD1433B25 is rated at 0.125W (1/8W). Substitute parts with 0.25W (1/4W), 0.333W (1/3W), or 0.4W (2/5W) ratings are electrically compatible. Higher power ratings do not affect circuit performance in applications designed for the original 0.125W component. Physical dimensions remain within 1206 package specifications.

Q: What is the difference between direct equivalents and upgrade substitutes?

A: Direct equivalents match the original 0.125W power rating (CPF1206B143KE1). Upgrade substitutes provide higher power ratings with additional features such as automotive AEC-Q200 qualification, anti-sulfur properties, or improved temperature coefficients. Both categories maintain the critical electrical parameters: 143 kOhms resistance, ±0.1% tolerance, thin film composition, and -55°C to 155°C operating range.

Q: Are all substitute parts ROHS3 compliant?

A: No. TNPW1206143KBETY is RoHS non-compliant. All other listed substitutes are ROHS3 compliant. Verify compliance requirements for your specific application before selection.

Q: Does the 1206 package dimension vary between manufacturers?

A: Yes. While all parts conform to the 1206 (3216 Metric) standard, dimensional tolerances vary slightly. Length ranges from 0.120" to 0.126" (3.05mm to 3.20mm), and height ranges from 0.020" to 0.033" (0.50mm to 0.84mm). Verify PCB footprint compatibility for space-constrained applications.

Q: Which substitute offers the best temperature stability?

A: RG3216N-1433-B-T5 and RG3216N-1433-W-T1 (Susumu) provide the lowest temperature coefficient at ±10ppm/°C, compared to ±25ppm/°C for the original part. RG3216N-1433-W-T1 additionally offers ±0.05% tolerance for applications requiring tighter resistance accuracy.

Q: What is the significance of automotive AEC-Q200 qualification?

A: AEC-Q200 qualification indicates the component meets automotive industry reliability standards for passive components. Parts with this rating (RN73R2BTTD1433B25, RNCF1206BTE143K, AT1206BRD07143KL, ERA-8AEB1433V, RG3216N-1433-B-T5, RG3216N-1433-W-T1, RG3216P-1433-B-T1) are suitable for automotive and high-reliability applications.

Q: Can I substitute TNPW1206143KBETY if my application operates only to 125°C?

A: TNPW1206143KBETY has a maximum operating temperature of 125°C, compared to 155°C for the original part and most substitutes. This part is suitable only if your application's maximum operating temperature does not exceed 125°C. Additionally, verify that RoHS non-compliance is acceptable for your application.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture-related degradation. All listed parts have MSL 1 rating, meaning they do not require special moisture-control storage or handling procedures.

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