My Inquiry
My Account
STMicroelectronics STTH3R04QRL
- Part No.:
- STTH3R04QRL
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
STTH3R04QRL.pdf
- Description:
- DIODE GEN PURP 400V 3A DO15
- Quantity:
- Payment:
- Shipping:
Inventory:5,251
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STTH3R04QRL from STMicroelectronics is a 400 V, 3 A ultrafast recovery diode using platinum-doped planar junction technology, optimized for high-frequency switching in low-voltage inverters, free-wheeling paths, and polarity protection circuits. It delivers typ. 18 ns reverse recovery time (trr), 0.9 V forward voltage at 150 °C, and 175 °C max junction temperature in DO-15 package.
For engineers reviewing the STTH3R04QRL datasheet, STTH3R04QRL pinout, STTH3R04QRL application, or STTH3R04QRL equivalent, key selection criteria include trr < 25 ns at 125 °C, VF ≤ 1.15 V @ IF = 3 A / Tj = 150 °C, Rth(j-l) = 25 °C/W, and DO-15 leaded package compatibility with through-hole reflow or hand-soldering.
Technical Context
This diode employs Pt-diffused planar technology to minimize minority carrier lifetime, enabling ultrafast recovery without softness trade-offs. Its dynamic performance is characterized under standardized conditions: IF = 1–3 A, dIF/dt = −50 to −200 A/µs, VR = 30–320 V, and Tj = 25–125 °C.
Thermal design relies on junction-to-lead resistance (25 °C/W for DO-15), validated for 10 mm lead length on infinite heatsink. Conduction loss is modeled as P = 0.9 × IF(AV) + 0.083 × IF²(RMS), supporting accurate thermal budgeting in SMPS base-drive stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Withstands repetitive reverse voltage up to 400 V without breakdown; suitable for 28 V–300 V DC bus clamp and flyback snubbing. |
| IF(AV) | 3 A @ Tlead = 70 °C - Average forward current rating defines continuous conduction capability in rectifier or freewheeling roles. |
| trr (typ) | 18 ns @ IF = 1 A, dIF/dt = −100 A/µs, VR = 30 V, Tj = 25 °C - Enables >500 kHz switching in resonant converters with minimal turn-off loss. |
| VF (typ) | 0.9 V @ IF = 3 A, Tj = 150 °C - Low forward drop reduces conduction loss and self-heating in high-duty-cycle applications. |
| Tj (max) | 175 °C - Maximum junction temperature allows operation in thermally constrained industrial enclosures without derating below 125 °C ambient. |
| Rth(j-l) | 25 °C/W - Junction-to-lead thermal resistance enables direct heatsinking via PCB copper or chassis mounting for DO-15 leads. |
| IRM (max) | 5.5 A @ IF = 3 A, dIF/dt = −200 A/µs, VR = 320 V, Tj = 125 °C - Peak reverse recovery current informs snubber sizing and EMI filter design. |
Pinout & Package
STTH3R04QRL is housed in DO-15 axial-leaded package (JEDEC DO-204AL), with cathode indicated by a band on the body. Leads are tinned and RoHS-compliant per ECOPACK® specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch emitter/source or ground return); must handle full IF(AV) and IFSM = 60 A surge. |
| Cathode | Forward current exit / reverse blocking terminal | Connected to higher-potential node (e.g., DC bus or inductor output); withstands full VRRM and absorbs reverse recovery energy. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery (trr ≤ 25 ns) | Reduces switching losses in hard-switched topologies operating above 200 kHz, improving efficiency over standard fast recovery diodes. |
| Low VF at high Tj (0.9 V @ 150 °C) | Maintains low conduction loss across industrial temperature range, minimizing thermal runaway risk in sealed enclosures. |
| High Tj rating (175 °C) | Enables use in space-constrained power stages where ambient exceeds 105 °C, eliminating need for oversized heatsinks. |
| ECOPACK® lead-free construction | Meets RoHS Directive 2011/65/EU and JEDEC JESD97 marking requirements; compatible with Pb-free soldering profiles. |
| DO-15 mechanical robustness | Rated for 10 mm lead length on infinite heatsink; supports manual assembly, wave soldering, and selective reflow without cracking. |
Applications
| DC-DC Converter Freewheeling Diode | Motor Drive Polarity Protection |
|---|---|
Use Scenario: Used as synchronous rectifier replacement in 48 V input buck converters delivering 12 V/5 A to telecom shelf controllers. IC Role / Device Role / Timing Role: Freewheeling diode conducting during low-side switch off-time; recovers before next cycle to prevent shoot-through. Use Value: 18 ns trr ensures clean commutation at 300 kHz, reducing voltage spikes and EMI vs. 50 ns alternatives. |
Use Scenario: Installed across motor terminals in 24 V brushed DC actuator modules to block reverse EMF during direction reversal. IC Role / Device Role / Timing Role: Unidirectional polarity clamp; blocks reverse voltage while passing forward current during normal operation. Use Value: 400 V VRRM provides 2× safety margin over 24 V system transients; 60 A IFSM handles stall-current surges. |
| SMPS Base-Drive Clamp | Inverter Output Snubber |
Use Scenario: Placed between BJT/MOSFET base/gate and emitter/source in high-speed switching amplifiers driving piezoelectric loads. IC Role / Device Role / Timing Role: Clamping diode limiting base-emitter reverse voltage during turn-off; recovers before next drive pulse. Use Value: Low IR (5 µA @ 125 °C) prevents leakage-induced bias shift; fast trr avoids latch-up in multi-stage drivers. |
Use Scenario: Integrated into RC snubber network across IGBT collector-emitter in 3-phase 400 V industrial inverters. IC Role / Device Role / Timing Role: Snubber diode absorbing turn-off energy; conducts transient current then recovers rapidly to reset. Use Value: 5.5 A IRM at 125 °C ensures reliable clamping of 400 V bus transients without secondary breakdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L04QRL | Lower VF (0.85 V typ @ 150 °C) but slower trr (35 ns typ @ 25 °C); same DO-15 package and 400 V rating. | Better conduction efficiency in low-frequency (<100 kHz), high-current linear supplies; unsuitable for >250 kHz SMPS. | Select when thermal budget dominates switching loss; avoid where trr-driven EMI or efficiency at high frequency is critical. |
| VS-3EYH04-M3/54 | Same 400 V/3 A rating, 20 ns trr, but SMB package (surface-mount); VF = 1.05 V @ 150 °C; Rth(j-a) = 65 °C/W. | Enables automated SMT assembly and higher board density; requires thermal pad layout for thermal management. | Choose for compact, high-volume PCB designs where reflow compatibility and footprint reduction outweigh leaded assembly benefits. |
Compared with STTH3R04QRL, STTH3L04QRL trades speed for lower VF in thermally limited systems, while VS-3EYH04-M3/54 shifts to surface-mount with higher thermal resistance but eliminates through-hole process steps.
Availability
STTH3R04QRL is available at Aetrix Electronics and suitable for DC-DC converter freewheeling, motor drive polarity protection, and SMPS base-drive clamp applications requiring stable component supply and long-term industrial availability.
Supply support for STTH3R04QRL 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 silicon solutions for automotive, industrial, and power management markets.
STTH3R04 belongs to ST's ultrafast recovery diode product line, engineered specifically for high-efficiency, high-frequency power conversion in industrial and telecom infrastructure equipment.
FAQ
What is the maximum allowable lead temperature during soldering for STTH3R04QRL?
The DO-15 package supports wave soldering with peak lead temperature ≤ 260 °C for ≤ 10 seconds, per JEDEC J-STD-020. Hand-soldering requires iron tip temperature ≤ 350 °C and contact time < 3 seconds per lead to avoid epoxy degradation or bond wire damage.
Does STTH3R04QRL require a heatsink in typical 3 A freewheeling operation?
No external heatsink is required if PCB copper area ≥ 2 cm² per lead is used and ambient temperature remains ≤ 70 °C. At 3 A average current and 70 °C ambient, junction temperature stays below 125 °C due to Rth(j-l) = 25 °C/W and low VF-induced loss (~2.7 W).
How does trr vary with junction temperature?
trr decreases as Tj rises: from 35 ns at 25 °C to 18 ns at 125 °C (per Figure 9). This inverse relationship improves high-temperature switching performance but demands careful layout to manage increased dV/dt-induced EMI at elevated temperatures.
Is STTH3R04QRL suitable for automotive under-hood applications?
No - STTH3R04QRL is not qualified to AEC-Q101 and lacks automotive-grade screening, humidity resistance, or extended temperature validation beyond 175 °C junction limit. For automotive use, ST recommends AEC-Q101-certified variants like STTH3R04-Y.
STTH3R04QRL 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):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 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)
STTH3R04QRL FAQ
1.How can I place an order for STTH3R04QRL through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH3R04QRL 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 STTH3R04QRL reliable?
The price and inventory of STTH3R04QRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH3R04QRL is usually 5 days.
3.What payment methods are accepted for STTH3R04QRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH3R04QRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH3R04QRL?
STTH3R04QRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH3R04QRL 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 STTH3R04QRL?
For technical support, including STTH3R04QRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH3R04QRL requirements.
6.How does Aetrix verify that STTH3R04QRL is sourced from the original manufacturer or authorized distributors?
All STTH3R04QRL 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 STTH3R04QRL meets industry standards.
7.What is the process for return or replacement of STTH3R04QRL?
All STTH3R04QRL units undergo pre-shipment inspection (PSI). If there is an issue with STTH3R04QRL, 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 STTH3R04QRL part is unused and in its original packaging.
Return procedure for STTH3R04QRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STTH3R04QRL Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
