MUN2136T1 Equivalent & Substitute Parts

Part Overview

The MUN2136T1 is a pre-biased PNP bipolar junction transistor (BJT) manufactured by onsemi, designed for surface mount applications in the SC-59 package. This component integrates internal base and emitter-base resistors (100 kOhms each) to simplify circuit design in switching and amplification applications. The device is rated for 50 V collector-emitter breakdown voltage and 100 mA maximum collector current with 230 mW power dissipation.

The MUN2136T1 carries an obsolete product status. Locating direct equivalents or suitable substitutes is necessary for ongoing production support, design updates, and inventory management. The onsemi MUN2136T1G variant provides an active-status alternative with identical electrical specifications and RoHS3 compliance, while several Diodes Incorporated and Rohm Semiconductor pre-biased PNP transistors offer functional substitution with differing internal resistor configurations and package options.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP - Pre-Biased	—
Current - Collector (Ic) Max	100	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Resistor - Base (R1)	100	kOhms
Resistor - Emitter Base (R2)	100	kOhms
DC Current Gain (hFE) Min @ Ic, Vce	80 @ 5mA, 10V	—
Vce Saturation (Max) @ Ib, Ic	250mV @ 300µA, 10mA	—
Current - Collector Cutoff (Max)	500	nA
Power - Max	230	mW
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MUN2136T1 is determined by the following critical parameters:

Mandatory Matching Criteria:

Transistor Type: PNP - Pre-Biased
Voltage - Collector Emitter Breakdown (Max): 50 V
Current - Collector (Ic) Max: 100 mA (or higher)
Mounting Type: Surface Mount
Package compatibility: SC-59, SOT-23-3, or equivalent three-pin surface mount packages

Internal Resistor Configuration: The MUN2136T1 features symmetric internal resistors (R1 = 100 kOhms, R2 = 100 kOhms). Substitute parts may employ different resistor values, which alter the bias network behavior and switching characteristics. Parts with identical resistor configurations provide direct functional equivalence. Parts with differing resistor values require circuit-level evaluation to confirm suitability for the target application.

Performance Parameters:

DC Current Gain (hFE) and saturation voltage (Vce Sat) vary among substitutes and influence switching speed and power dissipation
Frequency - Transition (where specified) indicates high-frequency capability; the MUN2136T1 does not specify this parameter, while many substitutes list 250 MHz

Compliance and Status:

Product Status: Active substitutes are preferred for new designs and ongoing production
RoHS Status: RoHS3-compliant substitutes are required for regulated applications; the original MUN2136T1 is RoHS non-compliant
Packaging: Tape & Reel (TR) is standard for production volumes; alternative packaging (Cut Tape, Digi-Reel) may apply to specific sourcing scenarios

Parameter Comparison

Part Number	Manufacturer	Ic Max (mA)	Vce Breakdown (V)	R1 (kOhms)	R2 (kOhms)	hFE Min @ Ic, Vce	Vce Sat Max (mV)	Power Max (mW)	Package	Product Status	RoHS Status
MUN2136T1	onsemi	100	50	100	100	80 @ 5mA, 10V	250 @ 300µA, 10mA	230	SC-59	Obsolete	RoHS non-compliant
MUN2136T1G	onsemi	100	50	100	100	80 @ 5mA, 10V	250 @ 300µA, 10mA	230	SC-59	Active	RoHS3 Compliant
DDTA114GCA-7-F	Diodes Incorporated	100	50	—	10	30 @ 5mA, 5V	300 @ 500µA, 10mA	200	SOT-23-3	Active	RoHS3 Compliant
DDTA123TCA-7-F	Diodes Incorporated	100	50	2.2	—	100 @ 1mA, 5V	300 @ 500µA, 5mA	200	SOT-23-3	Active	RoHS3 Compliant
DDTA124GCA-7-F	Diodes Incorporated	100	50	—	22	56 @ 5mA, 5V	300 @ 500µA, 10mA	200	SOT-23-3	Active	RoHS3 Compliant
DDTA124TCA-7-F	Diodes Incorporated	100	50	22	—	100 @ 1mA, 5V	300 @ 500µA, 5mA	200	SOT-23F	Active	RoHS3 Compliant
DDTA144ECA-7-F	Diodes Incorporated	100	50	47	47	68 @ 5mA, 5V	300 @ 500µA, 10mA	200	SOT-23-3	Active	RoHS3 Compliant
DDTA144GCA-7-F	Diodes Incorporated	100	50	—	47	68 @ 5mA, 5V	300 @ 500µA, 10mA	200	SOT-23-3	Active	RoHS3 Compliant
DTA114EKAT146	Rohm Semiconductor	50	50	10	10	30 @ 5mA, 5V	300 @ 500µA, 10mA	200	SMT3	Active	RoHS3 Compliant
DTA115ECAT116	Rohm Semiconductor	100	50	100	100	82 @ 5mA, 5V	300 @ 250µA, 5mA	200	SST3	Active	RoHS3 Compliant
DTA115EKAT146	Rohm Semiconductor	20	50	100	100	82 @ 5mA, 5V	300 @ 250µA, 5mA	200	SMT3	Active	RoHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Recommended for Replacement):

MUN2136T1G is the primary substitute for the obsolete MUN2136T1. This part is manufactured by onsemi and maintains identical electrical specifications, internal resistor configuration (R1 = 100 kOhms, R2 = 100 kOhms), and package designation (SC-59). The MUN2136T1G carries Active product status and RoHS3 compliance, addressing regulatory requirements and ensuring long-term availability. No circuit modifications are required for direct substitution.

Alternative Substitutes (Application-Dependent):

DDTA144ECA-7-F and DDTA144GCA-7-F (Diodes Incorporated) provide functional substitution with symmetric internal resistor configuration (R1 = 47 kOhms, R2 = 47 kOhms). These parts meet the 50 V, 100 mA electrical envelope and are RoHS3 compliant with Active status. The higher resistor values alter the bias network time constant and switching behavior; circuit validation is required before deployment.

DTA115ECAT116 (Rohm Semiconductor) matches the MUN2136T1 in internal resistor configuration (R1 = 100 kOhms, R2 = 100 kOhms) and current rating (100 mA). This part is RoHS3 compliant and Active. The SST3 package is mechanically compatible with SC-59 footprints. Saturation voltage specification differs (300 mV vs. 250 mV), indicating slightly different switching characteristics.

DDTA123TCA-7-F and DDTA124TCA-7-F (Diodes Incorporated) employ asymmetric resistor configurations (R1 only or R2 only) and are suitable only for applications where the bias network topology can accommodate single-resistor designs. These parts are RoHS3 compliant and Active.

DTA114EKAT146 (Rohm Semiconductor) is limited to 50 mA maximum collector current and is not suitable for applications requiring the full 100 mA rating of the MUN2136T1.

DTA115EKAT146 (Rohm Semiconductor) is limited to 20 mA maximum collector current and is not suitable for applications requiring the full 100 mA rating of the MUN2136T1.

Compliance Considerations:

All recommended substitutes are RoHS3 compliant, addressing regulatory requirements for new designs and production. The original MUN2136T1 is RoHS non-compliant and should be phased out in favor of compliant alternatives.

Frequently Asked Questions (FAQ)

Q: Can MUN2136T1G be used as a direct replacement for MUN2136T1?

A: Yes. MUN2136T1G is manufactured by onsemi with identical electrical specifications, internal resistor values (100 kOhms each), and SC-59 package. The primary differences are Active product status and RoHS3 compliance. No circuit modifications are required.

Q: What is the significance of internal resistor values (R1 and R2) in pre-biased transistors?

A: Internal resistors establish the bias network that determines the transistor's switching threshold and response time. The MUN2136T1 uses symmetric 100 kOhm resistors. Substitutes with different resistor values (such as DDTA144 series with 47 kOhm resistors) alter the bias point and switching characteristics. Applications sensitive to switching speed or bias current must evaluate these differences.

Q: Are Diodes Incorporated DDTA series parts compatible with MUN2136T1 applications?

A: Diodes Incorporated DDTA series parts meet the 50 V, 100 mA electrical envelope and are RoHS3 compliant. However, internal resistor configurations differ significantly. DDTA144ECA-7-F and DDTA144GCA-7-F use 47 kOhm resistors, while DDTA123TCA-7-F and DDTA124TCA-7-F employ asymmetric designs. Circuit-level evaluation is required to confirm suitability for specific applications.

Q: What is the difference between SC-59, SOT-23-3, and SMT3 packages?

A: SC-59, SOT-23-3, and SMT3 are equivalent three-pin surface mount packages with identical pin configurations and footprints. These designations reflect different manufacturer naming conventions. Parts specified in any of these packages are mechanically interchangeable on standard PCB layouts.

Q: Why do some substitutes specify lower maximum collector current (50 mA or 20 mA)?

A: DTA114EKAT146 and DTA115EKAT146 are designed for lower-current applications. These parts are not suitable for circuits requiring the full 100 mA rating of the MUN2136T1. Selection must match the application's current requirements.

Q: What does "RoHS3 Compliant" mean, and why is it important?

A: RoHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive, which limits the use of lead, cadmium, mercury, and other hazardous materials in electronic components. RoHS3-compliant parts are required for products sold in regulated markets. The original MUN2136T1 is RoHS non-compliant and should be replaced with compliant alternatives for new designs.

Q: Can DTA115ECAT116 replace MUN2136T1 in all applications?

A: DTA115ECAT116 matches the MUN2136T1 in current rating (100 mA), voltage rating (50 V), and internal resistor configuration (100 kOhms each). However, saturation voltage differs (300 mV vs. 250 mV), indicating slightly different switching performance. Applications with tight power dissipation budgets or high-speed switching requirements should evaluate this difference.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel (TR) packaging is standard for high-volume production and automated assembly. Cut Tape (CT) and Digi-Reel packaging are used for lower volumes or manual assembly. The electrical and mechanical specifications of the component are identical; packaging format affects supply chain logistics and handling procedures.

Q: Are there any frequency or switching speed differences between MUN2136T1 and its substitutes?

A: The MUN2136T1 does not specify transition frequency. Many substitutes (DDTA series, DTA series) specify 250 MHz transition frequency, indicating higher-frequency capability. For applications operating below the specified frequency limits of substitutes, this difference is not significant. High-frequency applications should confirm that selected substitutes meet frequency requirements.

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