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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation MUR315SBH

Name: MUR315SBH
Brand: Taiwan Semiconductor Corporation
SKU: MUR315SBH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MUR315SBH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: MUR315SBH.pdf

Description:: 25NS, 3A, 150V, ULTRA FAST RECOV

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MUR315SBH from Taiwan Semiconductor is an ultra-fast recovery surface-mount power rectifier with 150 V repetitive peak reverse voltage (V_RRM), 3 A average forward current (I_F), and 25 ns reverse recovery time (t_rr), designed for high-efficiency DC-DC converters and automotive freewheeling circuits.

For engineers reviewing the MUR315SBH datasheet, MUR315SBH pinout, MUR315SBH application, or MUR315SBH equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AA (SMB) package, glass-passivated junction, 175 °C maximum junction temperature, and low forward voltage drop of 0.86 V at 3.0 A and 25 °C.

Technical Context

The MUR315SBH is a single-die, unidirectional silicon rectifier optimized for high-frequency switching applications. Its ultra-fast recovery (t_rr ≤ 25 ns) minimizes switching losses in snubber and freewheeling paths, while the glass-passivated junction ensures robust reliability under thermal cycling and humidity stress.

Rated for continuous operation up to 175 °C junction temperature and qualified per AEC-Q101, it supports automotive-grade thermal and mechanical requirements including JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - enabling direct use in reflow-soldered automotive lighting and power modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	150 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 12–48 V automotive bus clamping and flyback secondary rectification.
I_F	3 A - Average forward current at T_L = 75 °C on PCB; supports continuous conduction mode in compact DC-DC converters without forced air cooling.
t_rr	≤25 ns - Ultra-fast reverse recovery; reduces turn-off loss and EMI in >100 kHz switching topologies such as synchronous buck freewheeling.
V_F @ 3 A, 25 °C	0.86 V max - Low forward voltage drop directly improves system efficiency and reduces thermal load on adjacent components.
R_θJA	76 °C/W - Junction-to-ambient thermal resistance on 10 mm × 10 mm Cu pad; enables thermal design predictability in space-constrained automotive PCB layouts.
Junction Temp Range	−55 °C to +175 °C - Full operational range validated for under-hood automotive environments and industrial power supplies.

Pinout & Package

Package: DO-214AA (SMB), surface-mount, single-anode/single-cathode configuration. Cathode identified by molded band. Matte tin-plated leads, solderable per J-STD-002.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter); must withstand I_FSM = 75 A surge during fault conditions.
Cathode (K)	Forward current exit point / reverse-blocking terminal	Connected to output rail or positive bus; polarity marked by visible cathode band; reverse leakage <5 µA at 25 °C ensures minimal standby loss.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including HTOL, TC, HTRB, and UHAST - enabling use in engine control, lighting, and ADAS power stages.
Glass-passivated junction	Hermetically sealed die surface prevents corrosion and degradation under high humidity and thermal cycling - critical for long-term reliability in automotive under-hood applications.
Moisture sensitivity level 1	No baking required before reflow; compatible with standard SMT assembly lines without special handling or dry-pack requirements.
Ultra-fast t_rr ≤ 25 ns	Enables efficient operation in high-frequency (>200 kHz) topologies where slower rectifiers would incur excessive switching loss and heat generation.

Applications

Automotive Lighting Power Supply	DC-DC Converter Secondary Rectification
Use Scenario: LED headlamp driver with 12 V input and 48 V constant-current output using synchronous buck-boost topology. IC Role / Device Role / Timing Role: Freewheeling diode during low-side switch off-time; handles 3 A continuous reverse-recovery current with minimal voltage overshoot. Use Value: 25 ns t_rr limits reverse recovery charge (Q_rr) to <15 nC, reducing EMI and improving efficiency over standard FRDs by ~1.2% at 250 kHz.	Use Scenario: 48 V to 5 V isolated flyback converter in vehicle infotainment power module. IC Role / Device Role / Timing Role: Output rectifier on secondary side; conducts 3 A average forward current with low V_F to minimize conduction loss. Use Value: 0.86 V V_F at 3 A reduces power dissipation by 0.26 W vs. typical 1.1 V FRD, lowering thermal stress on compact PCB layout.
Snubber Network in Motor Drive	Industrial PLC Input Protection
Use Scenario: RC snubber across IGBT collector-emitter in 24 V BLDC motor controller. IC Role / Device Role / Timing Role: Clamp transient voltage spikes during IGBT turn-off; absorbs energy via fast reverse recovery and low capacitance. Use Value: 45 pF junction capacitance and 25 ns t_rr enable effective high-frequency spike suppression without resonant ringing.	Use Scenario: Reverse-polarity and surge protection on 24 V digital input channel of industrial PLC backplane. IC Role / Device Role / Timing Role: Series-connected rectifier preventing reverse current flow; blocks transients up to 150 V with <5 µA leakage at 25 °C. Use Value: AEC-Q101 qualification and −55 °C to +175 °C rating ensure stable operation across wide ambient temperature swings in factory-floor environments.

Automotive Lighting Power Supply

DC-DC Converter Secondary Rectification

Use Scenario: LED headlamp driver with 12 V input and 48 V constant-current output using synchronous buck-boost topology.

IC Role / Device Role / Timing Role: Freewheeling diode during low-side switch off-time; handles 3 A continuous reverse-recovery current with minimal voltage overshoot.

Use Value: 25 ns t_rr limits reverse recovery charge (Q_rr) to <15 nC, reducing EMI and improving efficiency over standard FRDs by ~1.2% at 250 kHz.

Use Scenario: 48 V to 5 V isolated flyback converter in vehicle infotainment power module.

IC Role / Device Role / Timing Role: Output rectifier on secondary side; conducts 3 A average forward current with low V_F to minimize conduction loss.

Use Value: 0.86 V V_F at 3 A reduces power dissipation by 0.26 W vs. typical 1.1 V FRD, lowering thermal stress on compact PCB layout.

Snubber Network in Motor Drive

Industrial PLC Input Protection

Use Scenario: RC snubber across IGBT collector-emitter in 24 V BLDC motor controller.

IC Role / Device Role / Timing Role: Clamp transient voltage spikes during IGBT turn-off; absorbs energy via fast reverse recovery and low capacitance.

Use Value: 45 pF junction capacitance and 25 ns t_rr enable effective high-frequency spike suppression without resonant ringing.

Use Scenario: Reverse-polarity and surge protection on 24 V digital input channel of industrial PLC backplane.

IC Role / Device Role / Timing Role: Series-connected rectifier preventing reverse current flow; blocks transients up to 150 V with <5 µA leakage at 25 °C.

Use Value: AEC-Q101 qualification and −55 °C to +175 °C rating ensure stable operation across wide ambient temperature swings in factory-floor environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06S	V_RRM = 60 V, t_rr = 35 ns, R_θJA = 80 °C/W, non-AEC-Q101	Lower voltage rating and slower recovery limit use to ≤60 V, ≤100 kHz applications without automotive qualification.	Select only if 60 V rating suffices and AEC-Q101 is not required; verify thermal margin due to higher R_θJA.
ON Semi MUR315S	V_RRM = 150 V, t_rr = 25 ns, same SMB package, AEC-Q101 qualified, but lead-free matte tin plating differs in whisker test compliance (JESD201 Class 1 vs. Class 2).	Functionally interchangeable in most 150 V automotive designs, but requires validation for whisker-sensitive high-reliability modules.	Drop-in replacement where JESD201 Class 2 is not mandated; confirm board-level reliability testing aligns with end-equipment requirements.

Compared with STTH3L06S and ON Semi MUR315S, the MUR315SBH uniquely combines 150 V rating, 25 ns t_rr, AEC-Q101 qualification, and JESD201 Class 2 whisker resistance - making it the only option fully aligned with Tier-1 automotive power module specifications requiring all four attributes.

Availability

MUR315SBH is available at Aetrix Electronics and suitable for automotive lighting, DC-DC converter secondary rectification, and industrial PLC input protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MUR315SBH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS diodes, and MOSFETs for automotive and industrial markets.

The MUR315SBH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier family, engineered specifically for high-reliability, high-frequency power conversion in automotive under-hood and body electronics.

FAQ

What is the maximum junction temperature rating for the MUR315SBH?

The MUR315SBH has a maximum junction temperature (T_J) of +175 °C, verified per AEC-Q101 stress testing. This rating allows continuous operation in high-ambient environments such as automotive engine compartments. The device maintains specified electrical performance up to this temperature, with forward voltage decreasing to 0.69 V at 3.0 A and 150 °C. Thermal design must account for R_θJA = 76 °C/W on a 10 mm × 10 mm Cu pad.

Is the MUR315SBH pin-compatible with other devices in the MUR3xxSBH series?

Yes, all MUR3xxSBH devices - including MUR305SBH, MUR310SBH, MUR315SBH, and MUR320SBH - share identical DO-214AA (SMB) package dimensions, pinout, and thermal footprint. Only the V_RRM rating differs (50 V to 200 V). This allows design reuse across voltage grades without PCB layout changes, provided thermal and surge margins are verified for each variant's specific rating.

Does the MUR315SBH meet RoHS and halogen-free requirements?

Yes, the MUR315SBH is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants, and the matte tin-plated leads satisfy EU RoHS Directive 2011/65/EU and JEDEC JS709C. Certificate of Compliance is available upon request from Aetrix Electronics for full material declaration and substance reporting.

What is the reverse recovery time (t_rr) specification for the MUR315SBH, and under what test conditions?

The MUR315SBH has a maximum reverse recovery time (t_rr) of 25 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, per the manufacturer's datasheet. This ultra-fast recovery is achieved via optimized carrier lifetime control and supports high-frequency switching in DC-DC converters and snubber circuits without significant turn-off loss or voltage overshoot.

Can the MUR315SBH be used in place of a standard FRD in an existing automotive design?

Yes, the MUR315SBH can replace standard fast recovery diodes in automotive designs where 150 V V_RRM, 3 A I_F, and AEC-Q101 qualification are required. Its 25 ns t_rr and 0.86 V V_F improve efficiency and reduce EMI versus typical 50–100 ns FRDs. However, verify layout thermal relief and ensure the DO-214AA (SMB) footprint matches - no PCB change is needed if the original FRD used the same package.

MUR315SBH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 150 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 3 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 25 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 150 V

Capacitance @ Vr, F:: 45pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMB)

Operating Temperature - Junction:: -55°C ~ 175°C

MUR315SBH FAQ

1.How can I place an order for MUR315SBH through Aetrix?

Please submit a Request for Quotation (RFQ) for MUR315SBH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MUR315SBH reliable?

The price and inventory of MUR315SBH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR315SBH is usually 5 days.

3.What payment methods are accepted for MUR315SBH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR315SBH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MUR315SBH?

MUR315SBH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MUR315SBH order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MUR315SBH?

For technical support, including MUR315SBH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR315SBH requirements.

6.How does Aetrix verify that MUR315SBH is sourced from the original manufacturer or authorized distributors?

All MUR315SBH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MUR315SBH meets industry standards.

7.What is the process for return or replacement of MUR315SBH?

All MUR315SBH units undergo pre-shipment inspection (PSI). If there is an issue with MUR315SBH, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MUR315SBH part is unused and in its original packaging.

Return procedure for MUR315SBH:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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