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

STMicroelectronics STTH1R04QRL

Name: STTH1R04QRL
Brand: STMicroelectronics
SKU: STTH1R04QRL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH1R04QRL

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: STTH1R04QRL.pdf

Description:: DIODE GEN PURP 400V 1A DO15

Quantity:: RFQ Add To RFQ list

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Inventory:20,768

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Product details

Overview

STTH1R04QRL from STMicroelectronics is a 400 V, 1 A ultrafast recovery rectifier diode in DO-15 package, featuring 14 ns typical reverse recovery time, 0.9 V typical forward voltage at 150 °C, and 175 °C maximum junction temperature. It is engineered for low-voltage, high-frequency inverters, free-wheeling, and polarity protection circuits using Pt-doped planar technology.

For engineers reviewing the STTH1R04QRL datasheet, STTH1R04QRL pinout, STTH1R04QRL application, or STTH1R04QRL equivalent, key selection criteria include ultrafast trr (14 ns @ 1 A, −100 A/µs), thermal robustness (Tj = 175 °C), low VF stability across temperature, and DO-15 mechanical compatibility with legacy through-hole power designs.

Technical Context

This diode employs platinum-doped planar junction technology to achieve precise carrier lifetime control, enabling ultrafast recovery without softness degradation. Its dynamic behavior is characterized by low QRR (e.g., ~12 nC at dIF/dt = 100 A/µs, Tj = 125 °C) and minimal IRM (2.5–3.5 A under harsh switching conditions).

Thermal performance is optimized for lead-mounted operation: Rth(j-l) = 50 °C/W (DO-15, 10 mm leads on infinite heatsink), supporting reliable conduction loss management in compact power stages where forced airflow is limited.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - supports DC bus voltages up to 280 V RMS in bridge rectifiers with 1.4× safety margin
I_F(AV)	1 A - rated for continuous conduction in low-power SMPS output stages and base-drive clamping
t_rr(typ.)	14 ns - enables >500 kHz switching in synchronous rectifier-assisted topologies with minimal turn-off loss
V_F(typ.)	0.9 V @ T_j = 150 °C, I_F = 1 A - reduces conduction loss by ~25% vs. standard FRD at elevated temperature
T_j(max)	175 °C - allows operation in sealed enclosures or high-ambient industrial environments without derating
I_FSM	30 A @ 10 ms - withstands inrush currents in telecom DC/DC input filtering and hold-up capacitor charging
R_th(j-l)	50 °C/W - defines thermal path efficiency from junction to PCB lead; requires ≥10 mm lead length for datasheet-rated dissipation

Pinout & Package

STTH1R04QRL is housed in a DO-15 axial-leaded package per JEDEC DO-204AL. Cathode identified by band marking; anode and cathode terminals are electrically isolated except through the PN junction.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Forward current entry point	Connected to lower-potential node (e.g., switch node in flyback snubber or cathode of driving transistor)
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to higher-potential rail (e.g., +V_OUT in freewheeling path or positive DC bus)

Key Features

Feature	Design Value
Ultrafast recovery	t_rr = 14 ns typ. @ −100 A/µs enables high-frequency hard-switched converters without snubber losses
Low forward voltage drift	V_F increases only 0.25 V from 25 °C to 150 °C @ 1 A - maintains stable conduction loss across thermal range
High-temperature capability	Rated for continuous operation at T_j = 175 °C - eliminates need for oversized heatsinking in space-constrained modules
ECOPACK® compliance	Lead-free, RoHS-compliant construction with UL94 V0 epoxy - meets industrial and telecom environmental mandates

Applications

Telecom AC-DC Adapters

Industrial Motor Drive Snubbers

Use Scenario: Secondary-side rectification in 48 V telecom offline adapters operating at 200–300 kHz.

IC Role / Device Role / Timing Role: Ultrafast freewheeling diode clamping MOSFET drain during dead-time, preventing voltage overshoot.

Use Value: 14 ns t_rr minimizes reverse recovery charge injection, reducing EMI and improving efficiency by 0.8% over standard FRDs.

Use Scenario: Clamp diode in IGBT-based 3-phase inverter half-bridge snubber networks.

IC Role / Device Role / Timing Role: Absorbs inductive kickback energy during IGBT turn-off, limiting dv/dt stress.

Use Value: 175 °C T_j(max) and 30 A I_FSM ensure reliability under repeated short-circuit fault conditions in motor stall events.

Automotive Body Control Modules

LED Driver Polarity Protection

Use Scenario: Reverse polarity protection in 12 V/24 V automotive BCM power inputs exposed to jump-start transients.

IC Role / Device Role / Timing Role: Series-connected anode-to-input diode blocking reverse battery connection.

Use Value: 400 V V_RRM withstands load-dump spikes (ISO 7637-2 Pulse 5a: up to 120 V transient), eliminating fuse dependency.

Use Scenario: Input polarity guard in constant-current LED drivers for street lighting.

IC Role / Device Role / Timing Role: Low-V_F series diode preventing damage from accidental reverse wiring during field installation.

Use Value: 0.9 V V_F at 150 °C ensures <100 mW power loss at 1 A, avoiding thermal runaway in enclosed luminaires.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast recovery diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR120RLG	V_RRM = 200 V, t_rr = 35 ns, V_F = 0.93 V @ 25 °C - lower voltage rating and slower recovery	Suitable only for ≤140 V DC bus applications; not recommended for 400 V telecom rectification	Select when cost sensitivity outweighs voltage margin and switching speed requirements
Vishay VS-1EWH04-M3/54	V_RRM = 400 V, t_rr = 25 ns, V_F = 0.97 V @ 150 °C - 11 ns slower recovery, slightly higher VF	Acceptable for 200–300 kHz inverters but increases turn-off loss in >400 kHz designs	Prefer for legacy designs already qualified with TO-220AB footprint; not drop-in for DO-15 board layout

Compared with MUR120RLG and VS-1EWH04-M3/54, STTH1R04QRL delivers superior high-frequency performance (14 ns trr) and thermal stability (0.9 V VF at 150 °C), making it optimal for next-generation compact, high-efficiency power supplies where voltage margin and switching loss are critical.

Availability

STTH1R04QRL is available at Aetrix Electronics and suitable for telecom AC-DC adapters, industrial motor drive snubbers, and automotive body control modules requiring stable component supply and long-term obsolescence management.

Supply support for STTH1R04QRL 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STTH ultrafast diode product line targets high-efficiency, high-frequency power conversion systems-specifically engineered for reduced switching loss, enhanced thermal resilience, and seamless integration into space-constrained power stages.

FAQ

What is the cathode identification method for STTH1R04QRL?

The cathode is marked by a single color band near one lead end of the DO-15 package. This band aligns with the cathode symbol in the device outline drawing (Figure 20, DS5848 Rev 4). The unbanded lead is the anode. No polarity reversal is permitted during soldering or circuit operation.

Can STTH1R04QRL replace standard FR107 diodes in existing designs?

Yes, STTH1R04QRL is a direct DO-15 drop-in replacement for FR107 in terms of footprint and pinout, but offers significantly faster recovery (14 ns vs. 500 ns) and lower VF (0.9 V vs. 1.3 V at 150 °C). Designers must verify reduced reverse recovery charge does not induce unintended ringing in existing snubber networks.

What is the maximum allowable lead length for thermal performance compliance?

For full-rated 1 A average current operation, STMicroelectronics specifies 10 mm lead length on an infinite heatsink to achieve the published Rth(j-l) = 50 °C/W. Shorter leads increase thermal resistance; lengths below 6 mm require derating to ≤0.7 A to maintain Tj ≤ 175 °C under worst-case ambient conditions.

Does STTH1R04QRL support reflow soldering?

No - STTH1R04QRL is a DO-15 axial-leaded device intended for wave or hand soldering only. Its epoxy body and lead finish are not qualified for lead-free reflow profiles (peak temp ≥ 260 °C). Reflow exposure risks internal delamination, bond wire fracture, and irreversible VRRM degradation.

STTH1R04QRL Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 1 A

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

Reverse Recovery Time (trr):: 30 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 400 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-15

Operating Temperature - Junction:: 175°C (Max)

STTH1R04QRL FAQ

1.How can I place an order for STTH1R04QRL through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH1R04QRL 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 STTH1R04QRL reliable?

The price and inventory of STTH1R04QRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH1R04QRL is usually 5 days.

3.What payment methods are accepted for STTH1R04QRL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH1R04QRL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH1R04QRL?

STTH1R04QRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH1R04QRL 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 STTH1R04QRL?

For technical support, including STTH1R04QRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH1R04QRL requirements.

6.How does Aetrix verify that STTH1R04QRL is sourced from the original manufacturer or authorized distributors?

All STTH1R04QRL 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 STTH1R04QRL meets industry standards.

7.What is the process for return or replacement of STTH1R04QRL?

All STTH1R04QRL units undergo pre-shipment inspection (PSI). If there is an issue with STTH1R04QRL, 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 STTH1R04QRL part is unused and in its original packaging.

Return procedure for STTH1R04QRL:

1.Submit a request within 90 days.

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

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