HM4033-TP Equivalent & Substitute Parts

Part Overview

The HM4033-TP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, rated for 80V collector-emitter breakdown voltage and 1A maximum collector current in a surface mount SOT-89 package. This component is classified as obsolete, necessitating identification of equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, and thermal characteristics while accommodating modern supply chain availability.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	1	A
Voltage - Collector Emitter Breakdown (Max)	80	V
Vce Saturation (Max) @ Ib, Ic	500mV @ 50mA, 500mA	—
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 100mA, 5V	—
Power - Max	500	mW
Frequency - Transition	100	MHz
Operating Temperature	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-243AA	—
Supplier Device Package	SOT-89	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the HM4033-TP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

Transistor Type: PNP
Current - Collector (Ic) Max: 1 A minimum
Voltage - Collector Emitter Breakdown (Max): 80 V minimum
Mounting Type: Surface Mount
Package / Case: TO-243AA
Supplier Device Package: SOT-89 or compatible footprint
RoHS Status: ROHS3 Compliant

Allowable Variations:

Power dissipation may exceed 500 mW (higher ratings provide design margin)
Frequency - Transition may exceed 100 MHz (higher bandwidth is compatible)
Operating temperature range may exceed -55°C to 150°C (wider range is compatible)
DC Current Gain (hFE) may exceed minimum specification (higher gain is compatible)
Vce Saturation may be lower than 500mV (improved saturation performance is compatible)
Current - Collector Cutoff (ICBO) may be lower than 100nA (reduced leakage is compatible)

All identified substitute parts meet these criteria and maintain functional equivalence within the HM4033-TP application envelope.

Parameter Comparison

Parameter	HM4033-TP	CXT4033 TR PBFREE	2SB1260T100R	BCX53-16,135
Manufacturer	Micro Commercial Co	Central Semiconductor Corp	Rohm Semiconductor	Nexperia USA Inc.
Product Status	Obsolete	Active	Not For New Designs	Active
Transistor Type	PNP	PNP	PNP	PNP
Current - Collector (Ic) Max	1 A	1 A	1 A	1 A
Voltage - Collector Emitter Breakdown (Max)	80 V	80 V	80 V	80 V
Vce Saturation (Max) @ Ib, Ic	500mV @ 50mA, 500mA	500mV @ 50mA, 500mA	400mV @ 50mA, 500mA	500mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100nA	50nA	1µA	100nA
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 100mA, 5V	100 @ 100mA, 5V	180 @ 100mA, 3V	100 @ 150mA, 2V
Power - Max	500 mW	1.2 W	2 W	1.3 W
Frequency - Transition	100 MHz	100 MHz	100 MHz	145 MHz
Operating Temperature	-55 to 150°C	-65 to 150°C	150°C	150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-243AA	TO-243AA	TO-243AA	TO-243AA
Supplier Device Package	SOT-89	SOT-89	MPT3	SOT-89
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

CXT4033 TR PBFREE (Central Semiconductor Corp)

This substitute is classified as Active product status, ensuring long-term supply chain availability. It maintains identical electrical specifications to the HM4033-TP across all critical parameters: 1A collector current, 80V breakdown voltage, 100 MHz transition frequency, and 500mV saturation voltage. The CXT4033 provides enhanced performance with 1.2W power dissipation (versus 500mW) and lower collector cutoff current (50nA versus 100nA). Extended operating temperature range (-65°C to 150°C) accommodates broader environmental conditions. ROHS3 compliance and MSL-1 rating match the original specification. Packaging is supplied in Tape & Reel format.

BCX53-16,135 (Nexperia USA Inc.)

This substitute is classified as Active product status with AEC-Q100 automotive qualification. It meets all mandatory electrical parameters: 1A collector current, 80V breakdown voltage, and 500mV saturation voltage. The BCX53-16,135 offers superior transition frequency (145 MHz versus 100 MHz) and increased power dissipation (1.3W versus 500mW). DC current gain specification differs at test point (100 @ 150mA, 2V versus 100 @ 100mA, 5V) but maintains minimum gain equivalence. ROHS3 compliance and MSL-1 rating are confirmed. Automotive-grade qualification provides additional reliability assurance for demanding applications. Packaging is supplied in Tape & Reel format.

2SB1260T100R (Rohm Semiconductor)

This substitute is classified as Not For New Designs, indicating limited future availability and suitability primarily for legacy system maintenance. It satisfies core electrical requirements: 1A collector current and 80V breakdown voltage. The 2SB1260T100R provides enhanced performance with 2W power dissipation and improved saturation voltage (400mV versus 500mV). DC current gain is higher (180 @ 100mA, 3V). However, the Not For New Designs status restricts its application to replacement scenarios only. ROHS3 compliance and MSL-1 rating are maintained. Supplier device package is MPT3 rather than SOT-89, requiring footprint verification.

Frequently Asked Questions (FAQ)

Q: Can the CXT4033 TR PBFREE directly replace the HM4033-TP without circuit modification?

A: Yes. The CXT4033 TR PBFREE maintains identical electrical specifications across all critical parameters: 1A maximum collector current, 80V collector-emitter breakdown voltage, 100 MHz transition frequency, and 500mV saturation voltage at specified test conditions. Both components use TO-243AA package with SOT-89 supplier device package, ensuring mechanical and electrical compatibility. No circuit modification is required.

Q: What is the primary advantage of selecting BCX53-16,135 over other substitutes?

A: The BCX53-16,135 provides AEC-Q100 automotive qualification, making it suitable for applications requiring automotive-grade reliability standards. It also offers superior transition frequency (145 MHz versus 100 MHz) and higher power dissipation capability (1.3W versus 500mW), providing additional design margin. Product status is Active, ensuring long-term supply availability.

Q: Why is 2SB1260T100R marked as "Not For New Designs"?

A: The 2SB1260T100R carries a "Not For New Designs" status from Rohm Semiconductor, indicating the manufacturer is phasing out this component. While it meets electrical substitution criteria and remains available in inventory, it is recommended for legacy system maintenance only. New designs should utilize CXT4033 TR PBFREE or BCX53-16,135 for assured long-term supply chain support.

Q: Are there package differences between substitute parts?

A: The CXT4033 TR PBFREE and BCX53-16,135 both use SOT-89 supplier device package, matching the HM4033-TP footprint exactly. The 2SB1260T100R uses MPT3 supplier device package, which corresponds to the same TO-243AA case outline but may have different land pattern dimensions. Verify PCB footprint compatibility before selecting 2SB1260T100R.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All three substitute parts—CXT4033 TR PBFREE, 2SB1260T100R, and BCX53-16,135—are ROHS3 compliant and carry MSL-1 (Unlimited) moisture sensitivity level rating, matching the HM4033-TP environmental and regulatory specifications.

Q: What is the difference in DC current gain specifications between substitutes?

A: The HM4033-TP specifies minimum hFE of 100 @ 100mA, 5V. The CXT4033 TR PBFREE matches this specification exactly. The BCX53-16,135 specifies 100 @ 150mA, 2V (same minimum gain at different test conditions). The 2SB1260T100R specifies 180 @ 100mA, 3V (higher minimum gain). All substitutes meet or exceed the minimum gain requirement; higher gain values provide additional design margin.

Q: Can saturation voltage differences affect circuit performance?

A: The HM4033-TP, CXT4033 TR PBFREE, and BCX53-16,135 all specify 500mV maximum saturation voltage at 50mA base current and 500mA collector current. The 2SB1260T100R specifies 400mV, representing improved saturation performance. Lower saturation voltage reduces power dissipation in saturated switching applications. This difference is compatible with the HM4033-TP application envelope.

Q: What is the significance of collector cutoff current (ICBO) differences?

A: The HM4033-TP specifies maximum ICBO of 100nA. The CXT4033 TR PBFREE specifies 50nA (lower leakage), and the BCX53-16,135 specifies 100nA (equivalent). The 2SB1260T100R specifies 1µA (higher leakage). Lower ICBO values reduce reverse leakage current in off-state conditions, improving circuit performance in high-impedance applications. All values remain within acceptable ranges for standard switching applications.

Q: Is extended operating temperature range beneficial for the HM4033-TP application?

A: The HM4033-TP specifies -55°C to 150°C operating range. The CXT4033 TR PBFREE extends this to -65°C to 150°C, providing additional low-temperature margin. The BCX53-16,135 and 2SB1260T100R specify 150°C maximum only. Extended temperature range is beneficial for applications subject to extreme environmental conditions but is not required for standard industrial temperature ranges.

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