SP3050-04HTG Equivalent & Substitute Parts

Part Overview

The SP3050-04HTG is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for steering rail-to-rail protection with 4 unidirectional channels in a SOT-23-6 surface mount package. This part is rated for 6V reverse standoff voltage, 15V clamping voltage at peak pulse current, and 10A peak pulse current (8/20µs). The product status is obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	SP3050-04HTG
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Steering (Rail to Rail)
Unidirectional Channels	4
Voltage - Reverse Standoff (Typ)	6V (Max)
Voltage - Breakdown (Min)	8V (Typ)
Voltage - Clamping (Max) @ Ipp	15V
Current - Peak Pulse (10/1000µs)	10A (8/20µs)
Power - Peak Pulse	150W
Mounting Type	Surface Mount
Package / Case	SOT-23-6
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the SP3050-04HTG is determined by the following critical parameters:

Primary Matching Criteria:

Steering (Rail to Rail) type with 4 unidirectional channels
Voltage - Reverse Standoff: 6V (Max)
Voltage - Clamping (Max) @ Ipp: 15V
Current - Peak Pulse (10/1000µs): 10A (8/20µs)
Surface mount package compatibility
SOT-23-6 package footprint

Substitute Categories:

Category 1: Direct Electrical & Package Match Parts meeting all primary criteria with SOT-23-6 packaging and identical electrical specifications.

Category 2: Electrical Equivalents with Package Variation Parts meeting electrical specifications but with different surface mount packages (TSOP, SOIC, UDFN).

Category 3: Partial Electrical Match Parts with similar steering topology and channel count but differing in voltage or current ratings, suitable only for applications with relaxed specifications.

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (Max)	Clamping Voltage @ Ipp	Peak Pulse Current (8/20µs)	Power - Peak Pulse	Package	Channels	Product Status
SP3050-04HTG	Littelfuse Inc.	6V	15V	10A	150W	SOT-23-6	4	Obsolete
SRV05-4HTG	Littelfuse Inc.	6V	15V	10A	150W	SOT-23-6	4	Obsolete
CDSOT23-SRV05-4	Bourns Inc.	5V	15V	30A	500W	SOT-23-6	4	Active
SRV05-4.TCT	UMW	5V	20V	3A	60W	SOT-23-6	4	Active
D1213A-04TS-7	Diodes Incorporated	3.3V	10V	1A	—	TSOT-26	4	Active
NUP2201MR6T1G	onsemi	5V	20V	8A	500W	6-TSOP	2	Active
NUP4106DR2G	onsemi	3.3V	15V	25A	500W	8-SOIC	4	Active
RCLAMP0504N.TCT	Semtech Corporation	5V	17.5V	12A	300W	SLP2020P6	4	Active
SZCM1213A-04SO	onsemi	3.3V	10V	1A	—	SC-74	4	Active
USBLC6-2SC6	UMW	5V	15V	6A	150W	SOT-23-6	2	Active
USBLC6-4SC6	STMicroelectronics	5.25V	17V	5A	—	SOT-23-6	4	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

SRV05-4HTG (Littelfuse Inc.) provides the closest match with identical electrical parameters (6V reverse standoff, 15V clamping, 10A peak pulse current) and SOT-23-6 packaging. Both parts are obsolete, but SRV05-4HTG maintains the same performance envelope.

For Active Product Substitution with Enhanced Performance:

CDSOT23-SRV05-4 (Bourns Inc.) offers superior specifications in an active product status: 5V reverse standoff, 15V clamping voltage, and 30A peak pulse current (500W power rating). The SOT-23-6 package maintains footprint compatibility. This part exceeds the original specifications and is suitable for designs requiring higher current handling.

RCLAMP0504N.TCT (Semtech Corporation, RailClamp® series) provides active product status with 5V reverse standoff, 17.5V clamping voltage, and 12A peak pulse current in a 6-UDFN package. This part requires PCB layout modification due to package change but offers improved performance metrics.

For Reduced Specification Applications:

USBLC6-2SC6 (UMW) and USBLC6-4SC6 (STMicroelectronics) are active products in SOT-23-6 packages suitable for applications with lower current requirements. USBLC6-4SC6 maintains 4-channel configuration with 5.25V reverse standoff and 17V clamping voltage.

Compliance Considerations:

All listed substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. D1213A-04TS-7 and SZCM1213A-04SO include AEC-Q101 automotive qualification, suitable for automotive-grade applications.

Frequently Asked Questions (FAQ)

Q: Can SRV05-4HTG directly replace SP3050-04HTG without circuit modification?

A: Yes. SRV05-4HTG matches all electrical parameters (6V reverse standoff, 15V clamping, 10A peak pulse current) and uses identical SOT-23-6 packaging. No circuit or layout changes are required.

Q: What is the primary difference between SP3050-04HTG and CDSOT23-SRV05-4?

A: CDSOT23-SRV05-4 has lower reverse standoff voltage (5V vs. 6V), higher peak pulse current (30A vs. 10A), and higher power dissipation (500W vs. 150W). It is suitable for applications requiring higher transient current handling but may require circuit validation for lower voltage standoff operation.

Q: Why do some substitutes have different package types?

A: Package variations (TSOP, SOIC, UDFN, SC-74) reflect different manufacturers' design approaches. While electrical performance may be equivalent, package changes require PCB layout redesign and cannot be used as direct drop-in replacements without board modification.

Q: Are parts with 2 channels (NUP2201MR6T1G, USBLC6-2SC6) suitable replacements?

A: No. The SP3050-04HTG has 4 unidirectional channels for steering protection. Parts with 2 channels provide different protection topology and are not functionally equivalent for applications requiring 4-channel steering configuration.

Q: What does "Steering (Rail to Rail)" mean in the context of TVS diodes?

A: Steering topology provides bidirectional protection between multiple signal lines and power rails. The 4-channel configuration allows independent protection of four signal paths. This differs from simple clamping diodes and is essential for multi-line protection applications such as Ethernet interfaces.

Q: Can D1213A-04TS-7 or SZCM1213A-04SO replace SP3050-04HTG?

A: No. These parts have significantly lower specifications (3.3V reverse standoff, 10V clamping, 1A peak pulse current) and are designed for lower-voltage applications. They are not suitable for circuits designed for 6V standoff and 10A transient current handling.

Q: What is the significance of "Product Status: Active" vs. "Obsolete"?

A: Active products are currently manufactured and supported by the vendor with ongoing availability. Obsolete products are no longer manufactured. For new designs or long-term procurement, active product substitutes are preferred to ensure supply chain continuity.

Q: Does operating temperature range affect substitution suitability?

A: Operating temperature range affects application suitability but does not determine electrical substitution compatibility. SP3050-04HTG operates -40°C to 85°C. Substitutes with wider ranges (-55°C to 150°C) provide additional design margin but are not required for direct replacement in applications within the original temperature specification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message