MURS360BT3G — ON Semi 3A/600V Ultrafast Rectifier, 75ns t_rr (SMB)

What Are the Technical Specifications of MURS360BT3G?

Key numbers that matter: 600V at 3A in an SMB package. At 230V AC rectified (~325V DC bus), you have nearly 2× voltage margin for ringing and transients. The 75ns t_rr at 100kHz is 0.75% of the period. Above 200kHz, consider MURS320 (200V/3A, 25ns) if your rail voltage allows.

The 100A surge rating is worth attention. At 3A average, that's a 33× surge multiplier. In PFC circuits where the inrush into the output capacitor can hit 60–80A for a few cycles, the MURS360 handles it without added limiting. One less NTC thermistor or relay bypass circuit to design in.

When Should You Use (and NOT Use) the MURS360BT3G?

✔ Use MURS360BT3G when:

• 230V AC SMPS output rectification. Rectified 230V AC gives a ~325V DC bus. Reflected voltage plus leakage spike in a flyback secondary can reach 450–550V. The MURS360's 600V rating provides margin without going to a larger TO-220 part.
• PFC boost diode (sub-300W). In transition-mode PFC at 230V AC, the boost diode sees 400V output plus reverse recovery overshoot. 75ns t_rr keeps switching loss manageable below 150kHz without SiC diode cost. At 3A, it covers PFC stages up to about 300W output.
• Compact AC adapters and laptop power bricks. The SMB package is thinner than SMC and much smaller than TO-220. In a 65–90W adapter where the output rectifier sits on a tight secondary-side PCB, the MURS360BT3G fits where through-hole parts won't.
• Freewheeling diode in high-voltage buck converters. Offline buck converters stepping 325V DC down to 12–48V need a freewheeling diode rated for the full DC bus. At 3A continuous, the MURS360 handles sub-150W offline bucks.
• Automotive on-board chargers (use SURS8360BT3G for PPAP). OBC output rectification runs at 400–500V DC. The AEC-Q101 qualified SURS8360BT3G variant provides the same electrical performance with full PPAP documentation.

✘ Don't use MURS360BT3G when:

• Rail voltage is below 200V. The MURS360's higher V_F (1.25V) and slower t_rr (75ns) are penalties you pay for 600V blocking. For ≤200V rails, use the MURS320T3G (200V, 25ns, 0.875V V_F) — faster, cooler, cheaper.
• Average current above 2.5A in high-ambient. At T_A = 85°C with minimal copper, the 3A rating derates significantly. For sustained 3A in hot enclosures, step up to an SMC-packaged part with lower R_θJA or use the MURS360T3G (SMC, better thermals).
• Above 300kHz switching frequency. At 300kHz, 75ns is 2.25% of the period — recovery loss becomes noticeable. At these frequencies, step up to SiC (near-zero t_rr) or use STTH3R06S (600V/3A, 35ns).
• Ultra-low-profile designs (<1.5mm height). The SMB at 2.13mm max height is compact but not flat. For sub-1.5mm, look at DFN-packaged rectifiers or use a flip-chip Schottky.

What Are the Alternatives to MURS360BT3G?

MURS360BT3G vs MURS360T3G — SMB or SMC? Same silicon, different package. The SMB (BT3G) is smaller and cheaper. The SMC (T3G) has a larger leadframe for better heat dissipation.

If your layout has generous cathode copper pours and ambient stays below 65°C, the SMB version works fine at 3A. If you're pushing 3A in a sealed 85°C enclosure, the SMC version's lower thermal resistance is worth the extra board space.

How Much Does the MURS360BT3G Cost and Is It in Stock?

Contact ICMASS for a same-day quote. The MURS360BT3G is an active ON Semi catalog part. Full reel quantity is 2,500 units. Most orders ship same-day from Shenzhen. Production pricing in the ranges above depending on quantity and lead time.

What Are the Typical Applications of MURS360BT3G?

Flyback SMPS Output Rectifier (230V AC Input): In a 65W flyback adapter, the MURS360BT3G rectifies the secondary winding. The 600V rating covers reflected primary voltage (~150V) plus leakage spike margin. The SMB package fits on the cramped secondary-side PCB next to the output capacitors and common-mode choke.

PFC Boost Diode (Transition-Mode, Sub-300W): The boost diode carries full output current during MOSFET off-time. At 150kHz, 75ns t_rr keeps recovery loss manageable. Above 300W, the 3A rating becomes marginal — use a TO-220 ultrafast or SiC diode instead.

High-Voltage DC-DC Freewheeling Diode: Offline buck converters stepping 325V DC to 24V or 48V need a freewheeling diode rated for the full bus voltage. The MURS360's 600V rating and 100A surge capability handle the worst-case inrush into a shorted output without failing short — critical for safety-agency compliance.

Inverter Snubber and Clamp Circuits: In solar microinverters and motor drives, the DC bus runs at 350–400V. Snubber diodes across IGBTs and MOSFETs see the full DC bus plus ringing. The MURS360BT3G's oxide-passivated junction and AEC-Q101 pedigree provide the reliability margin for 10–15 year field life.

EV On-Board Charger Output Rectification: OBC output stages run at 400–500V DC with 3–6A output current. Two MURS360BT3G in parallel (with small balancing resistors) handle 6A with redundancy. For PPAP-tracked programs, use SURS8360BT3G — same die, formal automotive documentation.

Why Buy MURS360BT3G from ICMASS?

ON Semi authorized distribution. Every reel ships with ON Semi's original markings and lot traceability. The MURS3 series is widely second-sourced, and remarked parts with inferior trr or VF specs are a known issue in the high-voltage rectifier market. We source directly from ON Semi authorized channels.

Cross-reference support for high-voltage rectifier selection. Need help choosing between MURS360BT3G, STTH3R06S (ST), or VS-3EGH06 (Vishay FRED Pt)? Send us your bus voltage, switching frequency, and ambient temperature — we'll tell you which part gives the best efficiency at your operating point.

BOM consolidation for power supply designs. You're probably ordering MURS360 rectifiers alongside MURA ultrafasts, MBRS Schottkys, MOSFETs, and PWM controllers for the same build. One shipment, one invoice, full traceability across your BOM.

Shenzhen warehouse, global DHL/FedEx. Same-day shipping for orders before 15:00 CST. International delivery in 5–10 business days. Full reels, partial reels, and cut tape available.

Frequently Asked Questions About MURS360BT3G

Q1: What's the difference between MURS360BT3G and MURS360T3G?

A: Package size only — same silicon. BT3G = SMB (DO-214AA, smaller). T3G = SMC (DO-214AB, larger). Electrical specs are identical: 600V, 3A, 75ns, 1.25V V_F. The SMC version has better thermal dissipation (lower R_θJA). Choose SMB for space-constrained layouts, SMC for higher ambient temperatures or sustained 3A operation.

Q2: Can MURS360BT3G replace MURS360T3 (obsolete)?

A: Yes — the "G" suffix adds Pb-free/RoHS compliance. The MURS360T3 is the older non-RoHS version, now obsolete. MURS360BT3G is the active SMB replacement. If your layout used MURS360T3 in SMC, you have two options: MURS360T3G (SMC, like-for-like) or MURS360BT3G (SMB, if you can shrink the footprint).

Q3: Does the MURS360BT3G need a heatsink?

A: Not typically at ≤2A with decent cathode copper. At 3A with 1.25V V_F, dissipation is 3.75W. With R_θJA of 85°C/W on minimum pads, that's a 319°C junction rise — obviously you need more copper. Expand the cathode pad into a 10×10mm pour and R_θJA drops to ~40°C/W, giving a 150°C rise. At T_A = 65°C, T_J = 215°C — too hot. For 3A continuous, use the SMC version or keep ambient below 50°C with generous copper.

Q4: MURS360 vs MURS320 — which should I specify?

A: MURS320 if your rail is ≤150V. MURS360 if you need 600V headroom. The MURS320 gives you 25ns t_rr and 0.875V V_F — faster and cooler. But 200V is its limit. On a 230V AC PFC output (~400V DC), the MURS320 has zero margin. The MURS360's 75ns and 1.25V are the price of 600V blocking. Pick the lowest voltage rating your rail actually requires.

Q5: Is there an automotive version?

A: Yes — SURS8360BT3G. Same die, same SMB package, same electrical specs. The difference: AEC-Q101 qualification with full PPAP documentation and production part approval process support. For non-automotive designs, the standard MURS360BT3G is tested to the same AEC-Q101 standard (the datasheet shows it), just without the formal paperwork trail.

Q6: How does MURS360 compare to a SiC Schottky at 600V?

A: SiC wins on speed and V_F at light load; MURS360 costs less. A 600V SiC Schottky has near-zero t_rr and V_F around 1.5–1.7V at 3A. At 100kHz, the MURS360's 75ns recovery loss is measurable but small. At 300kHz+, SiC's zero-recovery advantage dominates. For sub-150kHz designs, the MURS360 gives 90% of the performance at roughly 30–40% of the cost.

Q7: What reel quantity does MURS360BT3G ship in?

A: 2,500 units per 330mm reel. SMB package, 16mm tape width. The smaller SMB package means more parts per reel than an SMC equivalent — good for high-volume pick-and-place. Partial reels and cut tape are available for prototyping and low-volume production.

Q8: Can I parallel two MURS360BT3G for 6A?

A: Yes, with current-sharing resistors. Ultrafast diodes don't share current naturally — the one with lower V_F hogs current and thermally runs away. Add a small series resistor (0.1–0.22Ω) on each diode's anode to force sharing. At 3A per diode, you lose ~0.3–0.66V in the resistors — factor that into your efficiency budget. For a cleaner 6A solution, use a single TO-220 ultrafast like the MUR1560 (600V/15A).

Related Products

• MURS320T3G — 200V/3A Ultrafast, 25ns, SMC
• MURS340T3G — 400V/3A Ultrafast, 50ns, SMC
• MURS360T3G — 600V/3A Ultrafast, SMC package
• SURS8360BT3G — AEC-Q101 automotive variant, same SMB
• STTH3R06S — ST 600V/3A, 35ns, Turbo-2
• MURA110T3G — 100V/1A Ultrafast, for lower-voltage rails