BT168E,112 Equivalent & Substitute Parts

Part Overview

The BT168E,112 is a sensitive gate SCR (silicon-controlled rectifier) rated for 500 V off-state voltage and 800 mA RMS current, manufactured by WeEn Semiconductors in TO-92-3 through-hole packaging. This component is active and RoHS compliant, designed for applications requiring controlled rectification with low gate trigger requirements.

Substitute parts are necessary when the BT168E,112 becomes unavailable, when alternative packaging or compliance certifications are required, or when application parameters allow for higher voltage or current ratings within the same form factor.

Key Parameters

Parameter	BT168E,112
Voltage - Off State	500 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV
Current - Gate Trigger (Igt) (Max)	200 µA
Voltage - On State (Vtm) (Max)	1.7 V
Current - On State (It (RMS)) (Max)	800 mA
Current - Hold (Ih) (Max)	5 mA
SCR Type	Sensitive Gate
Mounting Type	Through Hole
Package / Case	TO-92-3
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the BT168E,112 is determined by the following criteria:

Direct Substitutes maintain identical or superior electrical performance within the same package type (TO-92-3). Acceptable variations include:

Off-state voltage equal to or greater than 500 V
Gate trigger voltage and current within specified maximums
On-state voltage and current ratings meeting or exceeding the original specification
Identical SCR type classification (Sensitive Gate)
Through-hole mounting in TO-92-3 package
RoHS compliance status

Similar Substitutes share the same package and gate sensitivity characteristics but may differ in voltage or current ratings. These are suitable only when application parameters permit the alternative ratings.

Parameter Comparison

Parameter	BT168E,112	S6X8ESRP	EC103M	S401E	S6X8ES
Manufacturer	WeEn Semiconductors	Littelfuse Inc.	Littelfuse	Littelfuse Inc.	Littelfuse Inc.
Voltage - Off State	500 V	600 V	600 V	400 V	600 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV	800 mV	800 mV	1.5 V	800 mV
Current - Gate Trigger (Igt) (Max)	200 µA	200 µA	200 µA	10 mA	200 µA
Voltage - On State (Vtm) (Max)	1.7 V	1.7 V	1.7 V	1.6 V	1.7 V
Current - On State (It (RMS)) (Max)	800 mA	800 mA	800 mA	1 A	800 mA
Current - Hold (Ih) (Max)	5 mA	5 mA	5 mA	30 mA	5 mA
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate	Standard Recovery	Sensitive Gate
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Operating Temperature	Not specified	-40°C ~ 125°C	-40°C ~ 110°C	-40°C ~ 125°C	-40°C ~ 125°C

Engineering Selection Recommendations

S6X8ESRP and S6X8ES are direct functional equivalents to the BT168E,112. Both are Littelfuse sensitive gate SCRs with 600 V off-state voltage, matching gate trigger specifications, and identical on-state characteristics. S6X8ESRP is supplied in cut tape packaging with 2409 units in stock, while S6X8ES is supplied in bulk with 5100 units in stock. Both carry ROHS3 compliance and operate across -40°C to 125°C. These parts are suitable for applications where 600 V off-state voltage is acceptable.

EC103M is a Littelfuse sensitive gate SCR with 600 V off-state voltage and matching gate trigger specifications. It differs in non-repetitive surge current rating (16 A / 20 A versus 8 A / 9 A) and operates to 110°C maximum. EC103M is supplied in bulk with 5400 units in stock and carries ROHS3 compliance. This part is suitable for applications permitting 600 V operation and lower temperature limits.

S401E is a Littelfuse standard recovery SCR with 400 V off-state voltage and 1 A RMS current rating. It differs significantly in gate trigger voltage (1.5 V maximum) and current (10 mA maximum), and hold current (30 mA maximum). S401E is not a direct substitute due to different SCR type classification and lower voltage rating. This part is suitable only for applications with 400 V maximum voltage requirements and where standard recovery characteristics are acceptable.

All substitute parts maintain TO-92-3 through-hole packaging and RoHS compliance status.

Frequently Asked Questions (FAQ)

Q: Can S6X8ESRP directly replace BT168E,112 in my application?

A: S6X8ESRP is a direct functional equivalent. It maintains identical gate trigger specifications (800 mV, 200 µA maximum) and on-state characteristics. The 600 V off-state voltage exceeds the BT168E,112 specification of 500 V, making it suitable for applications where this higher rating is acceptable. Both use TO-92-3 packaging and are RoHS compliant.

Q: What is the difference between S6X8ESRP and S6X8ES?

A: S6X8ESRP and S6X8ES are electrically identical sensitive gate SCRs with 600 V off-state voltage and matching electrical specifications. The primary difference is packaging: S6X8ESRP is supplied in cut tape format, while S6X8ES is supplied in bulk. Both are suitable for direct substitution of the BT168E,112.

Q: Why is S401E listed as a substitute if it has different specifications?

A: S401E is listed as a similar substitute based on the provided input data. However, it differs in SCR type (standard recovery versus sensitive gate), gate trigger specifications, and off-state voltage (400 V). S401E is suitable only for applications where these differences are acceptable and 400 V operation is sufficient.

Q: Can I use EC103M if my application operates at lower temperatures?

A: EC103M operates to 110°C maximum, compared to 125°C for S6X8ESRP and S6X8ES. If your application operates within the -40°C to 110°C range, EC103M is suitable. It maintains identical gate trigger specifications and on-state characteristics as the BT168E,112, with 600 V off-state voltage.

Q: Are all substitute parts RoHS compliant?

A: Yes. The BT168E,112 is RoHS compliant, and all listed substitutes carry ROHS3 compliance certification, meeting current regulatory requirements.

Q: Does packaging format affect electrical performance?

A: No. S6X8ESRP (cut tape) and S6X8ES (bulk) are electrically identical. Packaging format affects only handling, storage, and supply chain logistics, not component performance.

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